/* Generated by scripts/build_css.py. Edit assets/css/*.css instead. */
@layer tokens, base, layout, navigation, components, pages, utilities, print;

/* === tokens.css === */
@layer tokens {
  :root {
    --site-max-width: 1180px;
    --site-content-width: min(var(--site-max-width), calc(100vw - 2rem));
    --site-section-gap: clamp(2rem, 5vw, 4rem);
    --site-card-radius: var(--radius-md, 0.75rem);
    --site-card-padding: clamp(1.15rem, 2.2vw, 1.6rem);
    --site-border: var(--border-subtle, #e2e8f0);
    --site-shadow-soft: 0 18px 40px color-mix(in srgb, var(--surface-tint, #3a665c) 10%, transparent);
    --site-footer-copy: "Course materials, tools, and academic resources.";
  }
}

/* === base.css === */
@layer base {
/* new-styles.css */
/* Global stylesheet for Prof. Volk's Office website */
/* Updated: March 18, 2025 */

/* Skip-to-main link for keyboard/screen-reader users */
.skip-to-main {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: var(--primary-main, #2563eb);
  color: #fff;
  border-radius: 0 0 4px 4px;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.15s;
}
.skip-to-main:focus {
  top: 0;
}

/* Global design tokens: high-end editorial system */
:root {
  color-scheme: light;
  /* Core Palette */
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-subtle: #e2e8f0;
  --primary-main: #2563eb;
  --emerald-main: #10b981;
  --danger-main: #ef4444;
  --warning-main: #f59e0b;
  --secondary: #64748b;
  /* Soft & Transparent Extension Tokens */
  --surface-transparent: color-mix(in srgb, var(--bg-surface) 80%, transparent);
  --border-transparent: color-mix(in srgb, var(--border-subtle) 65%, transparent);
  --primary-soft: color-mix(in srgb, var(--primary-main) 12%, transparent);
  --emerald-soft: color-mix(in srgb, var(--emerald-main) 12%, transparent);
  --danger-soft: color-mix(in srgb, var(--danger-main) 12%, transparent);

  --hero-on-dark: #f8faf7;
  --hero-on-dark-muted: rgba(248, 250, 247, 0.92);

  --hero-panel-bg: rgba(0, 29, 23, 0.44);
  --hero-panel-bg-strong: rgba(0, 29, 23, 0.58);
  --hero-panel-border: rgba(248, 250, 247, 0.16);

  --hero-contact-bg: rgba(248, 250, 247, 0.14);
  --hero-contact-border: rgba(248, 250, 247, 0.24);
  --hero-contact-label: rgba(248, 250, 247, 0.84);
  --hero-contact-icon: rgba(248, 250, 247, 0.92);
  --hero-contact-value: #ffffff;

  --hero-chip-bg: rgba(0, 29, 23, 0.40);
  --hero-chip-bg-accent: rgba(37, 99, 235, 0.28);
  --hero-chip-border: rgba(248, 250, 247, 0.14);

  --hero-bullet: #dbeafe;

  --ink-strong: #001d17;
  --ink-soft: #3d4a44;
  --ink-inverse: var(--bg-surface);
  --ink-earth: #3e271f;

  --emerald-deep: #001d17;
  --emerald-surface: #00342b;
  --emerald-container: #0f4a3e;
  --emerald-mist: #dce6e0;
  --emerald-shadow: var(--emerald-soft);

  --parchment-base: #f8faf7;
  --parchment-warm: #f2f4f1;
  --parchment-elevated: var(--bg-surface);
  --parchment-muted: #ebeeea;
  --parchment-deep: #e1e3e0;

  --accent-action: var(--primary-main);
  --outline-variant: #c0c8c4;
  --surface-tint: #3a665c;

  --surface: var(--parchment-base);
  --surface-container-low: var(--parchment-warm);
  --surface-container-lowest: var(--parchment-elevated);
  --surface-container: var(--parchment-muted);
  --surface-container-high: color-mix(in srgb, var(--parchment-warm) 55%, var(--emerald-mist));
  --surface-container-highest: var(--parchment-deep);
  --surface-bright: color-mix(in srgb, var(--parchment-elevated) 72%, var(--parchment-base));
  --surface-dim: color-mix(in srgb, var(--parchment-warm) 76%, var(--parchment-deep));
  --primary: var(--emerald-main);
  --primary-container: var(--emerald-surface);
  --secondary-tonal: var(--accent-action);
  --tertiary: var(--ink-earth);
  --on-surface: var(--text-main);
  --on-surface-variant: var(--ink-soft);
  --on-primary: var(--ink-inverse);
  --on-secondary: var(--ink-inverse);

  /* Tier 2 semantic tokens (migration foundation) */
  --bg-body: var(--bg-base);
  --bg-subtle: var(--bg-base);
  --bg-inverse: var(--primary);
  --card-surface: var(--bg-surface);
  --card-surface-alt: var(--bg-base);
  --panel-surface: var(--bg-base);
  --table-header-surface: var(--bg-base);
  --table-row-alt-surface: var(--bg-base);
  --footer-surface: var(--bg-base);
  --text-heading: var(--primary);
  --text-body: var(--on-surface);
  --text-muted: #64748b;
  --text-on-primary: var(--on-primary);
  --text-link: var(--primary-main);
  --text-link-hover: var(--primary-hover);
  --primary-base: var(--bg-surface);
  --primary-hover: color-mix(in srgb, var(--primary-main) 85%, black);
  --primary-surface: color-mix(in srgb, var(--primary-main) 10%, var(--bg-surface));
  --primary-text: var(--text-on-primary);
  --border-subtle: #e2e8f0;
  --border-base: var(--border-subtle);
  --overlay-light: rgba(17, 22, 20, 0.66);
  --overlay-medium: rgba(17, 22, 20, 0.82);
  --overlay-dark: rgba(17, 22, 20, 0.94);
  /* Tier 2b status semantic tokens */
  --status-success: #059669;
  --status-success-bg: var(--emerald-soft);
  --status-success-border: color-mix(in srgb, var(--emerald-main) 40%, transparent);
  --status-warning: #d97706;
  --status-warning-bg: rgba(217, 119, 6, 0.08);
  --status-warning-border: rgba(217, 119, 6, 0.35);
  --status-error: var(--danger-main);
  --status-error-bg: rgba(220, 38, 38, 0.08);
  --status-error-border: rgba(220, 38, 38, 0.35);
  --status-info: var(--primary-main);
  --status-info-bg: var(--primary-soft);
  --status-info-border: color-mix(in srgb, var(--primary-main) 32%, transparent);
  --callout-info-surface: var(--status-info-bg);
  --callout-info-border: var(--status-info-border);
  --callout-success-surface: var(--status-success-bg);
  --callout-success-border: var(--status-success-border);
  --callout-danger-surface: var(--status-error-bg);
  --callout-danger-border: var(--status-error-border);
  --diagram-line: var(--text-main);
  --diagram-label: var(--text-main);
  --diagram-accent: var(--primary-main);
  --diagram-bg: var(--bg-surface);
  --diagram-grid: color-mix(in srgb, var(--border-subtle) 65%, transparent);
  --diagram-axis: var(--border-subtle);
  --diagram-axis-label: var(--text-muted);
  --diagram-ray: var(--primary-main);
  --diagram-arc: var(--emerald-main);
  --diagram-turn: var(--text-muted);
  --diagram-reference: var(--warning-main);
  --diagram-origin: var(--primary-main);
  --excel-accent: var(--emerald-main);
  --nav-surface: linear-gradient(180deg, var(--nav-surface-start), var(--nav-surface-end));
  --nav-text: var(--text-main);
  --nav-text-hover: var(--primary-hover);
  --nav-text-current: var(--text-main);
  --nav-border: var(--border-transparent);
  --nav-dropdown-surface: var(--glass-surface);
  --nav-dropdown-text: var(--text-main);
  --emerald-soft: color-mix(in srgb, var(--emerald-main) 12%, transparent);
  --danger-soft: color-mix(in srgb, var(--danger-main) 12%, transparent);
  --primary-soft: color-mix(in srgb, var(--primary-main) 12%, transparent);
  --border-transparent: color-mix(in srgb, var(--border-subtle) 65%, transparent);
  --surface-transparent: color-mix(in srgb, var(--bg-surface) 80%, transparent);
  /*
   * Legacy compatibility aliases (temporary):
   * - Keep during migration window only (one full release cycle after Bucket C sign-off).
   * - Every alias must resolve through Tier 2 semantic tokens (no direct Tier 1/literal wiring).
   * - Do not introduce blind generic aliases (for example --text/--bg/--surface/--border/--accent)
   * outside approved scoped mapping patterns.
   */
  --primary-color: var(--primary-main);
  --secondary-color: var(--text-main);
  --accent-color: var(--primary-main);
  --text-color: var(--text-body);
  --muted-text-color: var(--text-muted);
  --light-text: var(--text-on-primary);
  --background-color: var(--bg-base);
  --card-background: var(--bg-surface);
  --featured-card-surface: linear-gradient(180deg, var(--surface-transparent), var(--surface-transparent)), linear-gradient(135deg, rgba(0, 29, 23, 0.96), rgba(0, 52, 43, 0.92));
  --featured-card-base: #002720;
  --featured-card-text: var(--primary-text);
  --featured-card-accent: color-mix(in srgb, var(--primary-main) 78%, var(--bg-surface) 22%);

  --font-display: "Newsreader", "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  --font-body: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-meta: var(--font-body);
  --type-display-family: var(--font-display);
  --type-body-family: var(--font-body);
  --type-meta-family: var(--font-meta);
  --display-lg: clamp(3rem, 5vw, 3.5rem);
  --display-md: clamp(2.3rem, 4vw, 2.8rem);
  --title-lg: 1.65rem;
  --title-md: 1.25rem;
  --body-md: 1rem;
  --body-sm: 0.95rem;
  --meta-sm: 0.82rem;
  --meta-tracking: 0.12em;
  --meta-weight: 600;
  --line-height-body: 1.7;
  --line-height-tight: 1.2;

  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;
  --section-space: clamp(3.5rem, 7vw, 6rem);
  --container-space: clamp(1.5rem, 3vw, 2.5rem);
  --stack-gap: clamp(1.5rem, 2vw, 2.5rem);

  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-pill: 999px;
  --border-radius: var(--radius-md);
  --transition: color 0.3s ease, background-color 0.3s ease, opacity 0.3s ease,
    transform 0.3s ease;

  --gradient-library-glow: radial-gradient(
      circle at top left,
      var(--emerald-soft),
      transparent 48%
    ),
    linear-gradient(135deg, rgba(0, 29, 23, 0.97), rgba(0, 52, 43, 0.92));
  --gradient-surface-soft: linear-gradient(
    180deg,
    var(--surface-transparent),
    rgba(242, 244, 241, 0.8)
  );
  --gradient-editorial-panel: linear-gradient(
    180deg,
    var(--surface-transparent),
    rgba(242, 244, 241, 0.9)
  );
  --gradient-editorial-tier: linear-gradient(
    180deg,
    rgba(220, 230, 224, 0.15),
    var(--surface-transparent)
  );
  --gradient-editorial-hover-tier: linear-gradient(
    180deg,
    rgba(220, 230, 224, 0.24),
    var(--surface-transparent)
  );
  --gradient-editorial-hover-panel: linear-gradient(
    180deg,
    var(--surface-transparent),
    rgba(242, 244, 241, 0.94)
  );
  --gradient-card-surface: linear-gradient(
    180deg,
    var(--surface-transparent),
    rgba(242, 244, 241, 0.88)
  );
  --gradient-card-surface-hover: linear-gradient(
    180deg,
    var(--surface-transparent),
    rgba(242, 244, 241, 0.9)
  );
  --gradient-publication-surface: linear-gradient(
    90deg,
    var(--emerald-soft),
    color-mix(in srgb, var(--emerald-main) 3%, transparent) 24%,
    transparent 70%
  ),
  linear-gradient(180deg, var(--surface-transparent), rgba(242, 244, 241, 0.72));
  --gradient-publication-surface-hover: linear-gradient(
    90deg,
    var(--primary-soft),
    var(--emerald-soft) 28%,
    transparent 74%
  ),
  linear-gradient(180deg, var(--surface-transparent), rgba(242, 244, 241, 0.82));
  --glass-surface: var(--surface-transparent);
  --ghost-outline: rgba(192, 200, 196, 0.15);
  --ambient-outline: rgba(192, 200, 196, 0.32);
  --elevation-veil: var(--surface-transparent);
  --elevation-veil-strong: var(--surface-transparent);
  --gradient-footer-surface: linear-gradient(180deg, var(--surface-transparent), rgba(220, 230, 224, 0.18) 14%, rgba(232, 235, 231, 0.98)),
    linear-gradient(180deg, rgba(242, 244, 241, 0.96), rgba(232, 235, 231, 0.98));
  --nav-surface-start: var(--surface-transparent);
  --nav-surface-end: rgba(242, 244, 241, 0.78);
  --context-surface-start: var(--surface-transparent);
  --context-surface-end: rgba(242, 244, 241, 0.88);
  --nav-pill-surface: var(--surface-transparent);
  --nav-mobile-panel-start: var(--surface-transparent);
  --nav-mobile-panel-end: rgba(242, 244, 241, 0.9);
  --nav-mobile-menu-surface: var(--surface-transparent);
}
/* Base styles */
body {
  font-family: var(--type-body-family);
  line-height: var(--line-height-body);
  margin: 0;
  padding: 0;
  color: var(--text-body);
  background:
    radial-gradient(circle at top, var(--emerald-soft), transparent 28%),
    linear-gradient(180deg, rgba(220, 230, 224, 0.24), transparent 24%),
    var(--bg-base);
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

/* Layout containers */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-space);
  width: 100%;
  box-sizing: border-box;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin-top: 0;
  color: var(--text-main);
  line-height: 1.3;
  font-family: var(--type-display-family);
}

a {
  color: var(--primary-main);
  text-decoration-line: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
  text-decoration-color: color-mix(in srgb, var(--primary-main) 72%, transparent);
  transition: color 0.2s ease, text-decoration-color 0.2s ease, text-decoration-thickness 0.2s ease, background-size 0.2s ease;
}

a:hover,
a:focus-visible {
  color: var(--primary-hover);
  text-decoration-color: currentColor;
  text-decoration-thickness: 0.12em;
}

:where(.page-shell-main, .course-page, .review-shell, .summary-sheet, .question-guide, .answer-content, .publications-item, .experience-item, .education-item, #research, #publications, #philosophy, #overview) :where(p, li, dd, figcaption, blockquote) a {
  text-decoration-color: color-mix(in srgb, var(--primary-main) 82%, transparent);
  text-decoration-thickness: 0.09em;
  text-underline-offset: 0.18em;
}

:where(.page-shell-main, .course-page, .review-shell, .summary-sheet, .question-guide, .answer-content, .publications-item, .experience-item, .education-item, #research, #publications, #philosophy, #overview) :where(p, li, dd, figcaption, blockquote) a:hover,
:where(.page-shell-main, .course-page, .review-shell, .summary-sheet, .question-guide, .answer-content, .publications-item, .experience-item, .education-item, #research, #publications, #philosophy, #overview) :where(p, li, dd, figcaption, blockquote) a:focus-visible {
  color: var(--tertiary);
  text-decoration-color: currentColor;
  text-decoration-thickness: 0.13em;
}


.list-reset,
.list-reset ul,
.list-reset ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.top-nav-links,
.top-nav-utilities,
.dropdown-menu,
.highlights-list,
.unit-task-meta,
.cv-section-nav #nav-menu {
  list-style: none;
  margin: 0;
  padding: 0;
}

:where(.course-page, .review-shell, .summary-sheet, .question-guide, .answer-content) :where(ul, ol):not(.list-reset):not(.top-nav-links):not(.top-nav-utilities):not(.dropdown-menu):not(.highlights-list):not(.unit-task-meta):not(.math130-summary-list) {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

:where(.course-page, .review-shell, .summary-sheet, .question-guide, .answer-content) :where(li):not(.highlights-list li):not(.math130-summary-list li) + li {
  margin-top: 0.55rem;
}

:where(.course-page, .review-shell, .summary-sheet, .question-guide, .answer-content) ul:not(.list-reset):not(.top-nav-links):not(.top-nav-utilities):not(.dropdown-menu):not(.highlights-list):not(.unit-task-meta):not(.math130-summary-list) {
  list-style: disc;
}

:where(.course-page, .review-shell, .summary-sheet, .question-guide, .answer-content) ol:not(.list-reset):not(.top-nav-links):not(.top-nav-utilities):not(.dropdown-menu):not(.highlights-list):not(.unit-task-meta):not(.math130-summary-list) {
  list-style: decimal;
}

:where(.course-page, .review-shell, .summary-sheet, .question-guide, .answer-content) :where(ul, ol):not(.list-reset):not(.top-nav-links):not(.top-nav-utilities):not(.dropdown-menu):not(.highlights-list):not(.unit-task-meta):not(.math130-summary-list) ::marker {
  color: var(--bg-surface);
  font-weight: 700;
}

:where(.course-page, .review-shell, .summary-sheet, .question-guide, .answer-content) :where(ul, ol) :where(ul, ol):not(.list-reset):not(.top-nav-links):not(.top-nav-utilities):not(.dropdown-menu):not(.highlights-list):not(.unit-task-meta):not(.math130-summary-list) {
  margin-top: 0.55rem;
  margin-bottom: 0.35rem;
}

/* Header styling */
header {
  margin: 0;
  padding: clamp(2.5rem, 5vw, 4rem) 0;
}

header h1 {
  margin: 0;
  font-size: var(--display-md);
}

.page-shell-header {
  position: relative;
  overflow: hidden;
  background: var(--gradient-library-glow);
  color: var(--text-on-primary);
  text-align: center;
  padding: clamp(3.25rem, 6vw, 5rem) 0;
}

.page-shell-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    var(--emerald-soft),
    var(--primary-soft)
  );
  pointer-events: none;
}

.page-shell-header .container {
  position: relative;
  z-index: 1;
}

.page-shell-header__eyebrow {
  margin-bottom: 0.8rem;
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: var(--meta-weight);
  letter-spacing: var(--meta-tracking);
  text-transform: uppercase;
  opacity: 0.88;
}

.page-shell-header .subtitle {
  max-width: 52rem;
  margin-left: auto;
  margin-right: auto;
}

.page-shell-header--profile .contact-info,
.page-shell-header--profile .contact-item,
.page-shell-header--profile .contact-item i {
  color: var(--text-on-primary);
}

/* Headings inside dark-gradient headers inherit light text rather than the
   global h1–h6 dark-emerald default, which would be invisible on the gradient. */
.page-shell-header h1,
.page-shell-header h2,
.page-shell-header h3,
.course-header h1,
.course-header h2 {
  color: var(--light-text);
}

.page-shell-main {
  padding-top: var(--spacing-12);
  padding-bottom: var(--spacing-12);
}


.reading-page {
  --reading-measure: clamp(42rem, 88vw, 48rem);
  --reading-block-space: clamp(1.75rem, 3vw, 2.5rem);
  display: grid;
  gap: var(--spacing-10);
}

.reading-page > * {
  min-width: 0;
}

.reading-flow,
.reading-surface,
.reading-block {
  max-width: var(--reading-measure);
  width: 100%;
  margin-inline: auto;
}

.reading-flow {
  background: var(--bg-base);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  box-shadow: none;
}

.reading-flow > * + * {
  margin-top: var(--reading-block-space);
}

.reading-flow h1,
.reading-flow h2,
.reading-flow h3,
.reading-flow h4 {
  color: var(--secondary);
}

.reading-flow h1,
.reading-page > h1,
.reading-page .reading-title {
  margin-bottom: var(--spacing-8);
}

.reading-flow h2,
.reading-page h2 {
  margin-top: var(--spacing-12);
  margin-bottom: var(--spacing-4);
}

.reading-flow h3,
.reading-page h3 {
  margin-top: var(--spacing-8);
  margin-bottom: var(--spacing-3);
}

.reading-flow p,
.reading-flow ul,
.reading-flow ol,
.reading-flow pre,
.reading-flow table,
.reading-flow blockquote,
.reading-page .reading-block {
  margin-bottom: 0;
}

.reading-page .reading-block,
.reading-page .question-guide,
.reading-page .unit-overview-block,
.reading-page .unit-module-card,
.reading-page .summary-sheet,
.reading-page .practice-sheet {
  max-width: var(--reading-measure);
  margin-inline: auto;
  background: var(--bg-base);
  border-radius: var(--radius-lg);
  padding: clamp(1.35rem, 2.6vw, 2rem);
  box-shadow: none;
}

.reading-page .question-guide,
.reading-page .unit-module-card,
.reading-page .unit-overview-block,
.reading-page .summary-sheet,
.reading-page .practice-sheet {
  margin-bottom: 0;
}

.reading-page .unit-task-card,
.reading-page .unit-resource-card,
.reading-page .course-meta-card,
.reading-page .quick-link-card {
  background: var(--bg-base);
  box-shadow: none;
}

.reading-page .unit-task-grid,
.reading-page .unit-resource-grid {
  gap: 0.85rem;
}

.reading-page .question-guide + .question-guide,
.reading-page .unit-module-card + .unit-module-card,
.reading-page .reading-block + .reading-block {
  margin-top: var(--spacing-6);
}

.reading-page :where(p, li) {
  max-width: 72ch;
}

.reading-page :where(pre, table) {
  overflow-x: auto;
}

.reading-page :where(p, li, dd, figcaption, blockquote) a {
  text-decoration-color: var(--surface-transparent);
}

.subtitle {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-top: 0.5rem;
}

/* Profile image styling */
.profile-image {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  border: none;
  margin-bottom: 1rem;
  box-shadow:
    0 0 0 0.45rem color-mix(in srgb, var(--surface-container-high) 56%, transparent),
    0 18px 36px rgba(0, 29, 23, 0.08);
  margin: 0 auto 1rem;
  overflow: hidden;
  background: var(--surface-container-high);
  display: flex;
  align-items: center;
  justify-content: center;
}

.profile-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Contact info styling */
.contact-info {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--secondary);
}

/* Legacy nav.navbar styling removed: use the .top-nav system site-wide. */

/* Main content area */
main {
  padding: var(--spacing-12) 0;
}

/* Section defaults */
section {
  margin: 0 0 var(--section-space);
  padding: 0;
}

section:last-child {
  margin-bottom: 0;
}

section h2 {
  margin-top: 0;
  margin-bottom: var(--spacing-5);
  padding-bottom: 0;
  border-bottom: none;
}

.editorial-panel,
.marketing-card,
.feature-section,
.promo-band {
  position: relative;
  background:
    var(--gradient-editorial-tier),
    var(--gradient-editorial-panel);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 4vw, 3rem);
  transition: var(--transition);
  outline: 1px solid transparent;
  -webkit-animation: fadeIn 0.5s ease-out forwards;
  animation: fadeIn 0.5s ease-out forwards;
  opacity: 0;
}

.editorial-panel:hover,
.marketing-card:hover,
.feature-section:hover,
.promo-band:hover {
  box-shadow: 0 18px 36px var(--border-transparent);
  outline-color: color-mix(in srgb, var(--bg-surface) 18%, var(--border-subtle));
}

/* Two-column layout */
.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-8);
}

/* Experience and education items */
.experience-item,
.education-item {
  margin-bottom: 1.5rem;
}

.item-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.item-title {
  font-weight: bold;
  color: var(--text-main);
}

.item-date {
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.item-subtitle {
  font-style: italic;
  margin-bottom: 0.5rem;
}

/* Publications styling */
.publications-item {
  margin-bottom: 1rem;
  padding: 1rem 1.15rem;
  border-radius: var(--radius-md);
  background: var(--gradient-publication-surface);
  transition: var(--transition);
}

.publications-item:hover {
  transform: translateX(5px);
  background: var(--gradient-publication-surface-hover);
}

/* Button styles */
.button,
.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  background: var(--primary-main);
  color: var(--bg-surface);
  padding: 0.9rem 1.6rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 700;
  line-height: 1.2;
  transition: var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
}

.button:hover,
.download-btn:hover {
  background: color-mix(in srgb, var(--primary-main) 85%, black);
  color: var(--bg-surface);
  transform: translateY(-1px);
}

.download-container {
  text-align: center;
  margin-bottom: 1.5rem;
}

.button-secondary {
  background: var(--primary-surface);
  color: var(--primary-main);
  border-color: var(--border-subtle);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: color-mix(in srgb, var(--primary-main) 18%, var(--bg-surface));
  color: var(--primary-hover);
  border-color: color-mix(in srgb, var(--primary-main) 44%, var(--border-subtle));
}

.home-main {
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-16);
}

.home-stage + .home-stage {
  margin-top: clamp(var(--spacing-20), 8vw, calc(var(--section-space) + var(--spacing-8)));
}

.home-kicker {
  margin: 0 0 var(--spacing-4);
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: var(--meta-weight);
  letter-spacing: var(--meta-tracking);
  text-transform: uppercase;
  color: var(--bg-surface);
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  gap: clamp(var(--spacing-8), 5vw, var(--spacing-16));
  align-items: start;
  padding: clamp(2.5rem, 5vw, 4rem);
  background: var(--gradient-library-glow);
  color: var(--on-primary);
}

.home-hero .home-kicker,
.home-hero h2,
.home-hero p,
.home-hero a:not(.button) {
  color: var(--on-primary);
}

.hero-copy-column {
  max-width: 38rem;
}

.hero-copy-column h2 {
  margin-bottom: var(--spacing-5);
  font-family: var(--type-display-family);
  font-size: var(--display-lg);
  line-height: 0.98;
}

.hero-lead {
  max-width: 34rem;
  font-size: 1.12rem;
  color: color-mix(in srgb, var(--on-primary) 88%, var(--surface-transparent));
}

.hero-cta-cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-4);
  align-items: center;
  margin-top: var(--spacing-8);
}

.hero-tertiary-wrap {
  margin: var(--spacing-5) 0 0;
}

.hero-tertiary-link {
  font-weight: 600;
  color: color-mix(in srgb, var(--on-primary) 86%, var(--surface-transparent));
  text-decoration-color: color-mix(in srgb, var(--on-primary) 38%, transparent);
}

.highlighted-destination-card {
  position: relative;
  padding: clamp(1.75rem, 3vw, 2.5rem);
  border-radius: var(--radius-lg);
  background-color: var(--bg-surface);
  background-image: linear-gradient(180deg, var(--surface-transparent), var(--surface-transparent));
  color: var(--text-main);
  backdrop-filter: blur(6px);
  transform: translateY(var(--spacing-8));
}

.home-hero .highlighted-destination-card .home-kicker {
  color: var(--primary-main);
}

.home-hero .highlighted-destination-card h3 {
  color: var(--text-main);
  margin-bottom: var(--spacing-4);
  font-size: clamp(1.9rem, 3vw, 2.4rem);
}

.home-hero .highlighted-destination-card p,
.home-hero .highlighted-destination-card li {
  color: var(--text-muted);
}

.home-hero .highlighted-destination-card a:not(.button) {
  color: var(--text-main);
}

.hero-cta-cluster > .button:not(.button-secondary),
.highlighted-destination-card .button {
  background: var(--primary-main);
  color: var(--bg-surface);
}

.hero-cta-cluster > .button:not(.button-secondary):hover,
.hero-cta-cluster > .button:not(.button-secondary):focus-visible,
.highlighted-destination-card .button:hover,
.highlighted-destination-card .button:focus-visible {
  background: color-mix(in srgb, var(--primary-main) 85%, black);
  color: var(--bg-surface);
}

.supporting-link-list {
  margin: var(--spacing-6) 0 var(--spacing-8);
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--spacing-3);
}

.supporting-link-list li {
  position: relative;
  padding-left: 1.25rem;
}

.supporting-link-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--bg-surface) 78%, var(--bg-surface));
}

.band-intro {
  max-width: 42rem;
  margin-bottom: var(--spacing-10);
}

.band-intro h2 {
  margin-bottom: var(--spacing-4);
}

.home-start-here {
  padding: 0 clamp(0rem, 1vw, 0.5rem);
}

.home-start-here__intro {
  margin-bottom: var(--spacing-12);
}

.supporting-card-grid {
  display: grid;
  gap: var(--spacing-8);
  align-items: start;
}

.home-start-grid {
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
}

.supporting-card {
  padding: clamp(1.5rem, 3vw, 2rem);
  border-radius: var(--radius-lg);
  background: var(--gradient-card-surface);
}

.supporting-card h3 {
  margin-bottom: var(--spacing-3);
}

.supporting-card p:last-child {
  margin-bottom: 0;
}

.supporting-card--feature {
  min-height: 100%;
  background: var(--gradient-card-surface-hover);
}

.supporting-card--feature h3 {
  font-size: clamp(2rem, 3vw, 2.5rem);
}

.home-start-sidebar {
  display: grid;
  gap: var(--spacing-6);
  align-content: start;
}

.supporting-card--sidebar {
  background: var(--gradient-card-surface);
}

.start-here-secondary-link {
  margin: 0;
  padding-left: var(--spacing-2);
  color: var(--on-surface-variant);
}

.start-here-secondary-link span {
  display: block;
  margin-bottom: var(--spacing-2);
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: var(--meta-weight);
  letter-spacing: var(--meta-tracking);
  text-transform: uppercase;
  color: var(--tertiary);
}

.home-support-strip {
  display: grid;
  grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1fr);
  gap: clamp(var(--spacing-8), 4vw, var(--spacing-12));
  align-items: start;
  padding: var(--spacing-10) 0;
}

.home-support-strip__media {
  padding: clamp(1.25rem, 2vw, 1.75rem);
  border-radius: var(--radius-lg);
  background: var(--gradient-card-surface);
}

.home-support-strip__mission {
  max-width: 36rem;
  align-self: center;
}

.home-support-strip__mission p:last-child {
  margin-bottom: 0;
  font-size: 1.08rem;
  color: var(--on-surface-variant);
}

.home-community-links {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: var(--spacing-8);
  align-items: end;
  padding-top: var(--spacing-4);
  color: var(--on-surface-variant);
}

.community-link-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-5) var(--spacing-8);
  align-items: center;
  justify-content: flex-start;
}

.community-link-row a {
  font-weight: 600;
}

@media (max-width: 960px) {
  .home-hero,
  .home-start-grid,
  .home-support-strip,
  .home-community-links {
    grid-template-columns: 1fr;
  }

  .highlighted-destination-card {
    transform: none;
  }
}

@media (max-width: 640px) {
  .home-main {
    padding-top: var(--spacing-12);
    padding-bottom: var(--spacing-12);
  }

  .home-stage + .home-stage {
    margin-top: var(--spacing-20);
  }

  .hero-cta-cluster {
    align-items: stretch;
  }

  .hero-cta-cluster .button {
    width: 100%;
  }

  .community-link-row {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-4);
  }
}

/* YouTube-specific styles */
.youtube-button {
  background-color: var(--danger-main);
}

.youtube-button:hover {
  background-color: #cc0000;
}

/* Card layout and styling */
.card-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-8);
}

.marketing-card {
  width: 100%;
  max-width: 300px;
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.marketing-card:hover {
  box-shadow: 0 18px 36px var(--border-transparent);
  outline-color: color-mix(in srgb, var(--bg-surface) 18%, var(--border-subtle));
}

.marketing-card h2 {
  color: var(--text-main);
  margin-top: 0;
}

.marketing-card p {
  margin-bottom: 1.5rem;
}

.marketing-card > a:not(.button),
.marketing-card > a:not(.button):hover,
.marketing-card > a:not(.button):focus-visible {
  display: inline-block;
  text-decoration: none;
}

.card-icon {
  font-size: var(--display-md);
  margin-bottom: 1rem;
  color: var(--primary-main);
}

/* Reusable course page styles */
.course-page {
  padding: var(--spacing-12) 0;
}

.course-page--longform {
  display: grid;
  gap: var(--spacing-8);
}

.course-page__prose {
  max-width: var(--reading-measure, clamp(42rem, 88vw, 48rem));
  width: 100%;
  margin-inline: auto;
}

.course-page__prose > section + section {
  margin-top: var(--spacing-10);
}

.course-page__lede {
  font-size: 1.05rem;
  color: var(--text-muted);
}

.course-page__section-intro {
  color: var(--text-muted);
}

.course-page__action-list {
  display: grid;
  gap: 0.6rem;
}

.course-page__link-list a {
  font-weight: 600;
}

.course-header {
  position: relative;
  overflow: hidden;
  background: var(--gradient-library-glow);
  color: var(--light-text);
}

.course-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    var(--emerald-soft),
    var(--primary-soft)
  );
  pointer-events: none;
}

.course-header .container {
  position: relative;
  z-index: 1;
}

.course-header--home {
  padding: 3.25rem 0;
}

.course-header--unit {
  padding: 2.75rem 0;
}

.course-header--home .subtitle,
.course-header--unit .subtitle {
  max-width: 52rem;
  margin-left: auto;
  margin-right: auto;
}

.course-identity-wrap {
  margin-top: -1.25rem;
  margin-bottom: 0.75rem;
  position: relative;
  z-index: 2;
}

.course-identity {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  align-items: stretch;
  background: var(--gradient-card-surface);
  box-shadow: 0 16px 34px var(--border-transparent);
  border-radius: var(--border-radius);
  padding: 1rem 1.25rem;
}

.course-identity__item {
  min-width: 0;
}

.course-identity__label {
  display: block;
  margin-bottom: 0.2rem;
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: var(--meta-weight);
  letter-spacing: var(--meta-tracking);
  text-transform: uppercase;
  color: color-mix(in srgb, var(--bg-surface) 72%, var(--text-muted));
}

.course-identity__value {
  margin: 0;
  color: var(--secondary);
  font-weight: 600;
  overflow-wrap: anywhere;
}

.course-identity__value--link a {
  font-weight: 700;
}

.course-identity__pill {
  display: inline-flex;
  align-items: center;
  padding: 0.32rem 0.78rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--bg-surface) 8%, var(--bg-surface));
  color: var(--secondary);
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: var(--meta-weight);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

:root[data-theme="dark"] .course-identity {
  outline-color: var(--border-subtle);
}

:root[data-theme="dark"] .course-identity__pill {
  background: rgba(126, 168, 255, 0.2);
}

.course-meta-grid,
.quick-link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.course-meta-card,
.quick-link-card,
.unit-overview-block {
  background: var(--gradient-card-surface);
  border-radius: var(--border-radius);
  padding: 1.25rem;
  box-shadow: 0 16px 34px var(--border-transparent);
}

.course-meta-card p:last-child,
.quick-link-card p:last-child,
.unit-overview-block > *:last-child {
  margin-bottom: 0;
}

.quick-link-card ul,
.unit-overview-links {
  list-style: disc;
  margin: 0.75rem 0 0 1.25rem;
  padding: 0;
}

.quick-link-card li + li,
.unit-overview-links li + li {
  margin-top: 0.5rem;
}

.unit-overview-block {
  margin-bottom: var(--spacing-8);
}

.course-unit-card {
  max-width: 330px;
}

.course-unit-card .button {
  width: 100%;
  box-sizing: border-box;
}

.unit-module-stack {
  display: grid;
  gap: 1.5rem;
}

.unit-module-card {
  background: var(--gradient-card-surface);
  border-radius: var(--border-radius);
  padding: var(--spacing-6);
  box-shadow: 0 16px 34px var(--border-transparent);
}

.unit-module-card + .unit-module-card {
  margin-top: 0;
}

.unit-module-card h2,
.unit-module-card h3 {
  margin-top: 0;
}

.unit-module-summary {
  margin-bottom: 1.25rem;
}

.unit-task-grid,
.unit-resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1rem 0 0;
}

.unit-task-card,
.unit-resource-card {
  background:
    linear-gradient(180deg, var(--primary-soft), var(--primary-soft)),
    linear-gradient(180deg, var(--surface-transparent), rgba(242, 244, 241, 0.8));
  border-radius: var(--border-radius);
  padding: 1rem;
  box-shadow: 0 12px 28px rgba(0, 29, 23, 0.04);
}

.unit-task-card h3,
.unit-resource-card h3 {
  margin-bottom: 0.5rem;
}

.unit-task-meta {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
}

.unit-task-meta li + li,
.unit-resource-card li + li {
  margin-top: 0.45rem;
}

.unit-task-meta strong {
  color: var(--secondary);
}

.unit-resource-card ul {
  list-style: disc;
  margin: 0.75rem 0 0 1.25rem;
  padding: 0;
}

.unit-detail-toggle {
  margin-top: 1.25rem;
  border-top: none;
  padding-top: 1rem;
}

.unit-detail-toggle summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--secondary);
}

.unit-detail-toggle summary + * {
  margin-top: 1rem;
}

:root[data-theme="dark"] .unit-task-card,
:root[data-theme="dark"] .unit-resource-card {
  background: rgba(126, 168, 255, 0.16);
  outline-color: var(--border-subtle);
}

:root[data-theme="dark"] .unit-detail-toggle {
  outline-color: var(--border-subtle);
}

.assignment-resource-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 1rem 0 2rem;
  background: var(--gradient-card-surface);
  overflow: hidden;
  border-radius: var(--border-radius);
  box-shadow: 0 14px 32px var(--border-transparent);
}

.assignment-resource-table th,
.assignment-resource-table td {
  padding: 0.75em;
  text-align: left;
  vertical-align: top;
}

.assignment-resource-table th {
  background: linear-gradient(180deg, var(--primary-soft), var(--primary-soft));
  color: var(--secondary);
}

.assignment-resource-table tbody tr:nth-child(even) td {
  background: var(--emerald-soft);
}

.assignment-resource-table tbody tr + tr td {
  box-shadow: inset 0 1px 0 var(--surface-transparent);
}

.course-sequence-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
  align-items: stretch;
}

.course-sequence-nav__link {
  margin: 0;
  width: 100%;
  text-align: center;
}

.course-sequence-nav__link[aria-disabled="true"] {
  pointer-events: none;
  opacity: 0.65;
}

.course-sequence-nav__link[aria-disabled="true"]:hover {
  transform: none;
}

@media (max-width: 700px) {
  .course-sequence-nav {
    grid-template-columns: 1fr;
  }
}

:root[data-theme="dark"] .assignment-resource-table th {
  background-color: rgba(126, 168, 255, 0.2);
}

:root[data-theme="dark"] .assignment-resource-table th,
:root[data-theme="dark"] .assignment-resource-table td {
  outline-color: var(--border-subtle);
}

/* Footer styling */
footer {
  background: var(--gradient-footer-surface);
  color: var(--secondary);
  text-align: center;
  padding: 2.75rem 0 2.25rem;
  margin-top: 4rem;
}

footer .container {
  display: grid;
  justify-items: center;
  gap: 0.75rem;
}

footer p {
  margin: 0;
}

/* Social links */
.social-links {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.social-links a {
  color: var(--secondary);
  font-size: 1.5rem;
  text-decoration: none;
  transition: var(--transition);
}

.social-links a:hover {
  color: var(--tertiary);
  transform: translateY(-3px);
}

/* 404 error page styling */
.error-container {
  background: var(--gradient-card-surface);
  border-radius: var(--border-radius);
  box-shadow: 0 18px 40px var(--border-transparent);
  padding: 2.5rem;
  width: 100%;
  max-width: 500px;
  text-align: center;
}

.error-icon {
  font-size: 4rem;
  color: var(--bg-surface);
  margin-bottom: 1rem;
}

.error-code {
  font-size: 3rem;
  font-weight: bold;
  color: var(--secondary);
  margin: 0;
}

.error-message {
  font-size: 1.2rem;
  margin: 1rem 0 2rem;
}

/* Special layout for error page */
main.error-main {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  min-height: 60vh;
}

/* Highlights list styling */
.highlights-list {
  list-style: none;
  margin: 1rem 0 2rem;
  padding: 0;
}

.highlights-list li {
  margin-bottom: 0.8rem;
  padding-left: 1.5rem;
  position: relative;
}

.highlights-list li:before {
  content: "▹";
  color: var(--bg-surface);
  position: absolute;
  left: 0;
  font-size: 1.2rem;
}

/* Skill badges */
.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--primary-soft);
  color: var(--secondary);
  padding: 0.3rem 0.8rem;
  border-radius: 50px;
  font-size: 0.9rem;
  transition: var(--transition);
}

.skill-badge:hover {
  background-color: var(--accent-color);
  transform: translateY(-2px);
}

/* Print styles */


.tool-page-body {
  background:
    radial-gradient(circle at top, var(--surface-transparent), transparent 28%),
    linear-gradient(180deg, color-mix(in srgb, var(--bg-base) 86%, transparent), transparent 22%),
    var(--bg-surface);
}

.tool-page-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-10) var(--container-space) var(--section-space);
}

.tool-page-shell,
.practice-sheet,
.tool-surface-card {
  background: var(--bg-base);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 2vw, 2rem);
  box-shadow: 0 20px 42px color-mix(in srgb, var(--surface-tint) 8%, transparent);
}

.tool-page-shell {
  display: grid;
  gap: var(--spacing-8);
}

.tool-panel,
.tool-control-panel,
.tool-result-panel,
.tool-callout,
.tool-chart-box,
.tool-info-box,
.review-callout,
.recommended-order-panel,
.journey-panel {
  background: var(--bg-base);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: none;
}

.tool-panel,
.tool-control-panel,
.tool-result-panel,
.tool-callout,
.tool-chart-box,
.tool-info-box {
  padding: clamp(1rem, 1.8vw, 1.4rem);
}

.tool-control-panel,
.tool-chart-box,
.tool-info-box,
.review-option-button,
.recommended-order-step,
.journey-step,
.practice-stat,
.stat-card,
.person-box,
.chart-container {
  background: var(--bg-base);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: none;
}

.tool-result-panel,
#info-box,
.review-results-panel {
  background: var(--surface-container-highest);
}

.tool-callout,
.review-callout,
.recommended-order-panel,
.journey-panel {
  border-color: color-mix(in srgb, var(--bg-surface) 24%, var(--border-subtle));
  background: linear-gradient(180deg, color-mix(in srgb, var(--bg-surface) 7%, var(--bg-base)), var(--bg-base));
}

.tool-chart-box,
.chart-container,
#linear-chart-container {
  background: var(--bg-base);
}

.tool-eyebrow,
.journey-kicker,
.recommended-order-panel .order-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bg-surface);
  margin-bottom: 0.7rem;
}

.tool-button,
.tool-button--secondary,
.btn-primary,
.btn-secondary,
.quiz-start-btn,
.practice-start-btn,
.solution-toggle,
.practice-action-btn,
.review-topic-btn,
.print-btn,
.reset-btn,
.quiz-next-btn {
  border-radius: var(--radius-md);
  font-family: var(--type-body-family);
  transition: var(--transition), box-shadow 0.2s ease;
}

.tool-button,
.btn-primary,
.quiz-start-btn,
.practice-start-btn,
.quiz-next-btn {
  background: var(--primary-container);
  color: var(--on-primary);
  box-shadow: none;
}

.tool-button:hover,
.tool-button:focus-visible,
.btn-primary:hover,
.btn-primary:focus-visible,
.quiz-start-btn:hover,
.quiz-start-btn:focus-visible,
.practice-start-btn:hover,
.practice-start-btn:focus-visible,
.quiz-next-btn:hover,
.quiz-next-btn:focus-visible {
  background: color-mix(in srgb, var(--primary-container) 88%, var(--bg-surface));
}

.tool-button--secondary,
.btn-secondary,
.solution-toggle,
.practice-action-btn,
.review-topic-btn,
.print-btn,
.reset-btn {
  background: var(--bg-base);
  color: var(--on-surface);
  border: 1px solid var(--border-subtle);
}

.tool-button--secondary:hover,
.tool-button--secondary:focus-visible,
.btn-secondary:hover,
.btn-secondary:focus-visible,
.solution-toggle:hover,
.solution-toggle:focus-visible,
.practice-action-btn:hover,
.practice-action-btn:focus-visible,
.review-topic-btn:hover,
.review-topic-btn:focus-visible,
.print-btn:hover,
.print-btn:focus-visible,
.reset-btn:hover,
.reset-btn:focus-visible {
  border-color: color-mix(in srgb, var(--bg-surface) 48%, var(--border-subtle));
  background: color-mix(in srgb, var(--bg-surface) 8%, var(--bg-base));
  color: var(--bg-surface);
}

.tool-button:focus-visible,
.tool-button--secondary:focus-visible,
.tool-panel :is(button, a, input, select, textarea):focus-visible,
.tool-page-shell :is(button, a, input, select, textarea):focus-visible {
  outline: 3px solid var(--surface-transparent);
  outline-offset: 2px;
}

.chart-container {
  position: relative;
  min-height: 320px;
  width: min(100%, 900px);
  margin: 1.5rem auto;
  padding: 1rem;
}

.person-box {
  text-align: center;
  padding: 1rem;
}

.tool-page-main h1,
.tool-page-main h2,
.tool-page-main h3 {
  color: var(--primary);
}

@media print {
  nav,
  .download-container,
  .menu-toggle,
  footer {
    display: none !important;
  }

  body {
    background-color: var(--bg-surface);
    font-size: 12pt;
    color: var(--text-main);
  }

  .editorial-panel,
  .feature-section,
  .promo-band,
  .marketing-card,
  .container {
    margin: 0;
    padding: 0.5in;
    box-shadow: none;
    break-inside: avoid;
  }

  a {
    color: var(--text-main);
    text-decoration: none;
  }

  .two-column {
    grid-template-columns: 1fr 1fr;
    gap: 0.5in;
  }

  @page {
    margin: 0.5in;
    size: portrait;
  }

  .card-container {
    display: block;
  }

  .card {
    page-break-inside: avoid;
    max-width: 100%;
    box-shadow: none;
    margin-bottom: 1rem;
  }
}

/* Dark Theme Variables applied via JS */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg-base: #18201d;
  --bg-surface: #1f2724;
  --bg-subtle: #18201d;
  --text-main: #f2f5f2;
  --text-body: #f2f5f2;
  --text-muted: #bac4bf;
  --surface: #111614;
  --surface-container-low: #18201d;
  --surface-container-lowest: #1f2724;
  --surface-container: #202825;
  --surface-container-high: #252e2b;
  --surface-container-highest: #2b3531;
  --surface-bright: #27312e;
  --surface-dim: #0d1210;
  --primary: #e9f1ed;
  --primary-container: #21483e;
  --secondary: #7ea8ff;
  --tertiary: #d0ad97;
  --outline-variant: #5e6b66;
  --surface-tint: #8bb1a8;
  --on-surface: #f2f5f2;
  --on-surface-variant: #bac4bf;
  --bg-body: var(--bg-base);
  --bg-inverse: #f8faf7;
  --text-heading: var(--text-main);
  --text-on-primary: #f8faf7;
  --primary-base: var(--bg-surface);
  --primary-hover: #cfe0ff;
  --primary-surface: rgba(126, 168, 255, 0.14);
  --primary-text: var(--text-on-primary);
  --border-subtle: rgba(255, 255, 255, 0.12);
  --border-base: var(--border-subtle);
  --overlay-light: var(--surface-transparent);
  --overlay-medium: var(--surface-transparent);
  --overlay-dark: var(--surface-transparent);
  --status-success: #34d399;
  --status-success-bg: rgba(52, 211, 153, 0.2);
  --status-success-border: rgba(52, 211, 153, 0.4);
  --status-warning: #f59e0b;
  --status-warning-bg: rgba(245, 158, 11, 0.16);
  --status-warning-border: rgba(245, 158, 11, 0.42);
  --status-error: #f87171;
  --status-error-bg: rgba(248, 113, 113, 0.2);
  --status-error-border: rgba(248, 113, 113, 0.45);
  --status-info: #7ea8ff;
  --status-info-bg: rgba(126, 168, 255, 0.2);
  --status-info-border: rgba(126, 168, 255, 0.4);
  --card-surface: #1f2724;
  --card-surface-alt: #18201d;
  --panel-surface: #18201d;
  --table-header-surface: #202825;
  --table-row-alt-surface: #18201d;
  --footer-surface: #18201d;
  --callout-info-surface: rgba(126, 168, 255, 0.16);
  --callout-info-border: rgba(126, 168, 255, 0.38);
  --callout-success-surface: rgba(52, 211, 153, 0.18);
  --callout-success-border: rgba(52, 211, 153, 0.38);
  --callout-danger-surface: rgba(248, 113, 113, 0.18);
  --callout-danger-border: rgba(248, 113, 113, 0.42);
  --diagram-line: var(--text-main);
  --diagram-label: var(--text-body);
  --diagram-accent: #7ea8ff;
  --diagram-bg: color-mix(in srgb, var(--surface-dim) 88%, black);
  --diagram-grid: color-mix(in srgb, var(--border-subtle) 22%, transparent);
  --diagram-axis: color-mix(in srgb, var(--border-subtle) 72%, transparent);
  --diagram-axis-label: var(--text-muted);
  --diagram-ray: color-mix(in srgb, var(--primary-main) 82%, white);
  --diagram-arc: color-mix(in srgb, var(--emerald-main) 82%, white);
  --diagram-turn: var(--text-muted);
  --diagram-reference: color-mix(in srgb, var(--warning-main) 82%, white);
  --diagram-origin: color-mix(in srgb, var(--primary-main) 82%, white);
  --excel-accent: #34d399;

  --hero-on-dark: #f8faf7;
  --hero-on-dark-muted: rgba(248, 250, 247, 0.94);

  --hero-panel-bg: rgba(17, 22, 20, 0.62);
  --hero-panel-bg-strong: rgba(17, 22, 20, 0.76);
  --hero-panel-border: rgba(242, 245, 242, 0.14);

  --hero-contact-bg: rgba(17, 22, 20, 0.52);
  --hero-contact-border: rgba(248, 250, 247, 0.16);
  --hero-contact-label: rgba(248, 250, 247, 0.80);
  --hero-contact-icon: rgba(248, 250, 247, 0.90);
  --hero-contact-value: #f8faf7;

  --hero-chip-bg: rgba(17, 22, 20, 0.56);
  --hero-chip-bg-accent: rgba(126, 168, 255, 0.22);
  --hero-chip-border: rgba(242, 245, 242, 0.12);

  --hero-bullet: #c8d9ff;
  --primary-color: var(--primary-main);
  --secondary-color: var(--text-main);
  --accent-color: var(--primary-main);
  --text-color: var(--text-body);
  --muted-text-color: var(--text-muted);
  --light-text: var(--text-on-primary);
  --background-color: var(--bg-base);
  --card-background: var(--bg-surface);
  --featured-card-surface: linear-gradient(180deg, var(--surface-transparent), var(--surface-transparent)), linear-gradient(135deg, rgba(22, 29, 27, 0.95), rgba(33, 72, 62, 0.88));
  --featured-card-base: #16211d;
  --featured-card-text: var(--primary-text);
  --featured-card-accent: color-mix(in srgb, var(--primary-main) 82%, var(--primary-surface));
  --glass-surface: rgba(31, 39, 36, 0.85);
  --ghost-outline: rgba(94, 107, 102, 0.18);
  --ambient-outline: rgba(94, 107, 102, 0.36);
  --nav-surface-start: rgba(31, 39, 36, 0.92);
  --nav-surface-end: rgba(24, 32, 29, 0.88);
  --context-surface-start: rgba(31, 39, 36, 0.78);
  --context-surface-end: rgba(17, 22, 20, 0.9);
  --nav-pill-surface: rgba(31, 39, 36, 0.78);
  --nav-mobile-panel-start: rgba(31, 39, 36, 0.96);
  --nav-mobile-panel-end: rgba(24, 32, 29, 0.92);
  --nav-mobile-menu-surface: rgba(24, 32, 29, 0.98);
  --nav-surface: linear-gradient(180deg, var(--nav-surface-start), var(--nav-surface-end));
  --nav-text: #f2f5f2;
  --nav-text-hover: #c8d9ff;
  --nav-text-current: #f8faf7;
  --nav-border: color-mix(in srgb, var(--outline-variant) 42%, transparent);
  --nav-dropdown-surface: rgba(24, 32, 29, 0.98);
  --nav-dropdown-text: #f2f5f2;
  --gradient-library-glow: radial-gradient(
      circle at top left,
      rgba(126, 168, 255, 0.12),
      transparent 48%
    ),
    linear-gradient(135deg, rgba(17, 22, 20, 0.94), rgba(33, 72, 62, 0.9));
  --gradient-surface-soft: linear-gradient(
    180deg,
    rgba(43, 53, 49, 0.94),
    rgba(24, 32, 29, 0.92)
  );
  --gradient-editorial-panel: linear-gradient(
    180deg,
    rgba(43, 53, 49, 0.82),
    rgba(24, 32, 29, 0.9)
  );
  --gradient-editorial-tier: linear-gradient(
    180deg,
    rgba(37, 46, 43, 0.3),
    rgba(17, 22, 20, 0)
  );
  --gradient-editorial-hover-tier: linear-gradient(
    180deg,
    rgba(43, 53, 49, 0.4),
    rgba(17, 22, 20, 0)
  );
  --gradient-editorial-hover-panel: linear-gradient(
    180deg,
    rgba(49, 60, 56, 0.88),
    rgba(24, 32, 29, 0.96)
  );
  --gradient-card-surface: linear-gradient(
    180deg,
    rgba(43, 53, 49, 0.82),
    rgba(24, 32, 29, 0.9)
  );
  --gradient-card-surface-hover: linear-gradient(
    180deg,
    rgba(49, 60, 56, 0.9),
    rgba(24, 32, 29, 0.96)
  );
  --gradient-publication-surface: linear-gradient(
    90deg,
    rgba(126, 168, 255, 0.12),
    var(--emerald-soft) 24%,
    transparent 70%
  ),
  linear-gradient(180deg, rgba(43, 53, 49, 0.82), rgba(24, 32, 29, 0.9));
  --gradient-publication-surface-hover: linear-gradient(
    90deg,
    rgba(126, 168, 255, 0.2),
    var(--emerald-soft) 28%,
    transparent 74%
  ),
  linear-gradient(180deg, rgba(49, 60, 56, 0.88), rgba(24, 32, 29, 0.96));
  --elevation-veil: rgba(17, 22, 20, 0.66);
  --elevation-veil-strong: rgba(17, 22, 20, 0.82);
  --gradient-footer-surface: linear-gradient(180deg, transparent, rgba(37, 46, 43, 0.18) 14%, rgba(24, 32, 29, 0.98)),
    linear-gradient(180deg, rgba(24, 32, 29, 0.96), rgba(17, 22, 20, 0.98));
}

:root[data-theme="dark"] .profile-image {
  border-color: var(--secondary);
}

:root[data-theme="dark"] .item-date {
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--on-surface-variant);
}

/* Theme Toggle Button Styling */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  margin: 0;
  flex: 0 0 auto;
  align-self: center;
  color: var(--secondary);
  border-radius: 50%;
  background-color: var(--primary-soft);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle:hover {
  background-color: var(--primary-soft);
  transform: scale(1.1);
}
/* Accessibility improvements */
:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

:root[data-theme="dark"] :focus {
  outline-color: var(--bg-surface);
}

/* Dark mode: button-secondary uses a light blue background, so needs dark text */
:root[data-theme="dark"] .button-secondary {
  color: var(--emerald-main);
}

:root[data-theme="dark"] .button-secondary:hover,
:root[data-theme="dark"] .button-secondary:focus-visible {
  color: var(--emerald-main);
}

/* Dark mode: skill-badge hover uses a light blue background, so needs dark text */
:root[data-theme="dark"] .skill-badge:hover {
  color: var(--emerald-main);
}

/* Dark mode: math130 unit card refinements */
:root[data-theme="dark"] .math130-unit-card {
  outline: 1px solid var(--border-transparent);
}

:root[data-theme="dark"] .math130-unit-card--priority::before {
  background: linear-gradient(90deg, var(--bg-surface), transparent 70%);
}

:root[data-theme="dark"] .math130-unit-card:hover {
  outline-color: color-mix(in srgb, var(--bg-surface) 28%, var(--border-subtle));
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@-webkit-keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
 }

/* Stagger section animations for smoother page load */
:is(.editorial-panel, .feature-section, .promo-band, .marketing-card):nth-child(1) {
  animation-delay: 0.05s;
}
:is(.editorial-panel, .feature-section, .promo-band, .marketing-card):nth-child(2) {
  animation-delay: 0.1s;
}
:is(.editorial-panel, .feature-section, .promo-band, .marketing-card):nth-child(3) {
  animation-delay: 0.15s;
}
:is(.editorial-panel, .feature-section, .promo-band, .marketing-card):nth-child(4) {
  animation-delay: 0.2s;
}
:is(.editorial-panel, .feature-section, .promo-band, .marketing-card):nth-child(5) {
  animation-delay: 0.25s;
}

/* Media queries for responsive design */
@media (max-width: 768px) {
  /* Hamburger menu toggle */
  .menu-toggle {
    display: flex;
    width: 100%;
    text-align: left;
    padding: 0.75rem 1rem;
    justify-content: space-between;
    align-items: center;
  }

  /* Consistent dropdown handling - Updated for mobile */
  .dropdown-menu {
    position: static;
    width: 100%;
    box-shadow: none;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    transition:
      max-height 0.3s ease-out,
      opacity 0.2s ease-out,
      visibility 0.2s ease-out;
  }

  .dropdown-open {
    max-height: 500px;
    opacity: 1;
    visibility: visible;
    transition:
      max-height 0.5s ease-in,
      opacity 0.3s ease-in,
      visibility 0.3s ease-in;
  }

  /* Dropdown menu styling for mobile */
  .dropdown-menu a {
    padding-left: 2.5rem;
  }

  /* Fix responsive layout */
  .two-column {
    grid-template-columns: 1fr;
  }

  .item-header {
    flex-direction: column;
  }

  .container {
    padding: 0 1rem;
  }

  .editorial-panel,
  .feature-section,
  .promo-band,
  .marketing-card {
    padding: var(--spacing-6);
  }

  .card-container {
    flex-direction: column;
    align-items: center;
  }

  .card {
    max-width: 100%;
  }

  .contact-info {
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
  }
}

/* High contrast mode support */
@media (forced-colors: active) {
  :root {
    --bg-body: Canvas;
    --bg-surface: Canvas;
    --bg-subtle: Canvas;
    --bg-inverse: CanvasText;
    --text-heading: CanvasText;
    --text-body: CanvasText;
    --text-muted: GrayText;
    --text-on-primary: Canvas;
    --primary-base: Highlight;
    --primary-hover: Highlight;
    --primary-surface: Canvas;
    --primary-text: Canvas;
    --border-subtle: CanvasText;
    --border-base: CanvasText;
    --overlay-light: transparent;
    --overlay-medium: transparent;
    --overlay-dark: transparent;
    --status-success: Highlight;
    --status-success-bg: Canvas;
    --status-success-border: CanvasText;
    --status-warning: Highlight;
    --status-warning-bg: Canvas;
    --status-warning-border: CanvasText;
    --status-error: Highlight;
    --status-error-bg: Canvas;
    --status-error-border: CanvasText;
    --status-info: Highlight;
    --status-info-bg: Canvas;
    --status-info-border: CanvasText;
    --primary-color: var(--primary-main);
    --secondary-color: var(--text-main);
    --accent-color: var(--primary-main);
    --text-color: var(--text-body);
    --muted-text-color: var(--text-muted);
    --light-text: var(--text-on-primary);
    --background-color: var(--bg-base);
    --card-background: var(--bg-surface);
  }

  .skill-badge,
  .button,
  .download-btn {
    border: 1px solid CanvasText;
  }
}
/* Canonical Global Site Navbar */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: none;
  box-shadow: inset 0 -1px 0 var(--nav-border);
}

.top-nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.top-nav-branding {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.top-nav-title {
  color: var(--nav-text);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.2;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
}

.top-nav-title:hover,
.top-nav-title:focus-visible {
  color: var(--nav-text-hover);
}

.top-nav-links,
.top-nav-utilities {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.top-nav-links li,
.top-nav-links .dropdown,
.top-nav-utilities li,
.top-nav-utilities .dropdown {
  position: relative;
}

.top-nav-links .dropdown::after,
.top-nav-utilities .dropdown::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  height: 0.7rem;
}

.top-nav-links > li > a,
.top-nav-links > li > button,
.top-nav-links > a,
.top-nav-utilities > li > a,
.top-nav-utilities > li > button,
.top-nav-utilities .dropdown-menu a,
.top-nav-links .dropdown-menu a {
  display: block;
  color: var(--nav-text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.2;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  transition: color 0.2s ease, background-color 0.2s ease, text-decoration-color 0.2s ease;
}

.top-nav-links > li > a:hover,
.top-nav-links > li > a:focus-visible,
.top-nav-links > li > button:hover,
.top-nav-links > li > button:focus-visible,
.top-nav-links > a:hover,
.top-nav-links > a:focus-visible,
.top-nav-utilities > li > a:hover,
.top-nav-utilities > li > a:focus-visible,
.top-nav-utilities > li > button:hover,
.top-nav-utilities > li > button:focus-visible,
.top-nav-links .dropdown-menu a:hover,
.top-nav-links .dropdown-menu a:focus-visible,
.top-nav-utilities .dropdown-menu a:hover,
.top-nav-utilities .dropdown-menu a:focus-visible {
  color: var(--nav-text-hover);
  background: var(--primary-surface);
  text-decoration-line: underline;
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.22em;
  text-decoration-color: currentColor;
  outline: none;
}

.top-nav a:focus-visible,
.top-nav button:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--primary-main) 62%, var(--bg-surface) 12%);
  outline-offset: 3px;
  box-shadow: 0 0 0 0.35rem var(--primary-soft);
}

.top-nav-links .dropdown-trigger,
.top-nav-utilities .dropdown-trigger {
  background: transparent;
  border: none;
  font: inherit;
  cursor: pointer;
}

.top-nav-title[aria-current="page"] {
  color: var(--nav-text-current);
  background: linear-gradient(135deg, color-mix(in srgb, var(--bg-subtle) 88%, transparent), var(--surface-transparent));
  box-shadow: inset 0 0 0 999px var(--surface-transparent);
}

.top-nav-links a[aria-current="page"],
.top-nav-links button[aria-current="page"],
.top-nav-utilities a[aria-current="page"],
.top-nav-utilities button[aria-current="page"] {
  color: var(--nav-text-current);
  background: color-mix(in srgb, var(--primary-main) 12%, var(--bg-surface));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary-main) 24%, var(--border-subtle));
}

.top-nav-links a[aria-current="page"]:hover,
.top-nav-links a[aria-current="page"]:focus-visible,
.top-nav-links button[aria-current="page"]:hover,
.top-nav-links button[aria-current="page"]:focus-visible,
.top-nav-utilities a[aria-current="page"]:hover,
.top-nav-utilities a[aria-current="page"]:focus-visible,
.top-nav-utilities button[aria-current="page"]:hover,
.top-nav-utilities button[aria-current="page"]:focus-visible {
  color: var(--nav-text-current);
  background: color-mix(in srgb, var(--primary-main) 16%, var(--bg-surface));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary-main) 30%, var(--border-subtle));
}

.page-context-bar {
  background: linear-gradient(180deg, var(--context-surface-start), var(--context-surface-end));
  border-bottom: none;
}

.page-context-bar .container {
  padding-top: 0.8rem;
  padding-bottom: 0.8rem;
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: var(--meta-weight);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
  background: var(--gradient-editorial-panel);
  box-shadow: inset 0 1px 0 var(--surface-transparent);
}

.breadcrumb a {
  color: var(--text-main);
  font-weight: 600;
  text-decoration: none;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--primary-hover);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.breadcrumb-sep,
.breadcrumb-current {
  color: color-mix(in srgb, var(--text-muted) 65%, transparent);
}

.breadcrumb-current {
  font-weight: 700;
}

@media (max-width: 768px) {
  .page-context-bar .container {
    padding-top: 0.7rem;
    padding-bottom: 0.7rem;
  }

  .breadcrumb {
    font-size: 0.84rem;
  }
}

.top-nav-links .dropdown-menu,
.top-nav-utilities .dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 0.2rem);
  left: 0;
  z-index: 20;
  min-width: 190px;
  margin: 0;
  padding: 0.4rem;
  list-style: none;
  background: var(--nav-dropdown-surface);
  border-radius: 0.75rem;
  box-shadow: inset 0 0 0 1px var(--nav-border);
}

.top-nav-links .dropdown:hover .dropdown-menu,
.top-nav-links .dropdown:focus-within .dropdown-menu,
.top-nav-utilities .dropdown:hover .dropdown-menu,
.top-nav-utilities .dropdown:focus-within .dropdown-menu {
  display: block;
}

.top-nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-left: auto;
}

.top-nav-utilities {
  padding-left: 0.35rem;
  margin-left: 0.15rem;
  border-left: none;
}

.top-nav-utilities > li > a,
.top-nav-utilities > li > button {
  color: var(--nav-text);
  font-size: 0.9rem;
}

.dropdown-menu--right {
  left: auto;
  right: 0;
}

.menu-toggle.global-nav-toggle {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  min-height: 2.75rem;
  padding: 0.65rem 0.9rem;
  border: none;
  border-radius: 0.85rem;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--bg-base) 96%, transparent), color-mix(in srgb, var(--bg-base) 92%, transparent));
  color: var(--text-main);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  box-shadow: inset 0 0 0 1px var(--border-transparent);
}

.menu-toggle.global-nav-toggle .menu-toggle__icon::before {
  content: "☰";
  font-size: 1.1rem;
  line-height: 1;
}

.top-nav[data-menu-open="true"] .menu-toggle.global-nav-toggle .menu-toggle__icon::before {
  content: "✕";
}

.top-nav-links .dropdown[data-mobile-open="true"] .dropdown-menu,
.top-nav-links .dropdown[data-desktop-open="true"] .dropdown-menu,
.top-nav-utilities .dropdown[data-mobile-open="true"] .dropdown-menu,
.top-nav-utilities .dropdown[data-desktop-open="true"] .dropdown-menu {
  display: block;
  opacity: 1;
  visibility: visible;
}

.top-nav .theme-toggle {

  margin: 0;
}

.cv-section-nav {
  position: sticky;
  top: 4.6rem;
  z-index: 900;
  background: linear-gradient(180deg, color-mix(in srgb, var(--glass-surface) 92%, transparent), color-mix(in srgb, var(--bg-base) 94%, transparent));
  border-top: none;
  border-bottom: none;
  box-shadow: inset 0 -1px 0 var(--border-transparent);
}

.cv-section-nav .cv-section-nav__inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.35rem 1.5rem;
}

.cv-section-nav .menu-toggle {
  background: transparent;
  color: var(--text-main);
}

.cv-section-nav #nav-menu {
  display: flex;
  justify-content: center;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.cv-section-nav #nav-menu > li {
  position: relative;
}

.cv-section-nav #nav-menu > li > a {
  display: block;
  padding: 0.8rem 1rem;
  color: var(--text-main);
  font-weight: 600;
  border-radius: 999px;
}

.cv-section-nav #nav-menu > li > a:hover,
.cv-section-nav #nav-menu > li > a:focus-visible,
.cv-section-nav #nav-menu .dropdown-menu a:hover,
.cv-section-nav #nav-menu .dropdown-menu a:focus-visible {
  background: var(--primary-surface);
  color: var(--primary-hover);
  outline: none;
}

.cv-section-nav .dropdown-menu {
  position: absolute;
  top: calc(100% + 0.25rem);
  left: 0;
  min-width: 220px;
  margin: 0;
  padding: 0.35rem;
  background: linear-gradient(180deg, color-mix(in srgb, var(--bg-base) 96%, transparent), color-mix(in srgb, var(--bg-base) 90%, transparent));
  border-radius: 0.75rem;
  box-shadow: inset 0 0 0 1px var(--border-transparent);
  opacity: 0;
  visibility: hidden;
}

.cv-section-nav li:hover .dropdown-menu,
.cv-section-nav li:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.cv-section-nav .dropdown-menu a {
  display: block;
  padding: 0.65rem 0.85rem;
  border-radius: 0.6rem;
  color: var(--text-body);
}

@media (max-width: 768px) {
  .top-nav-inner {
    align-items: flex-start;
  }

  .top-nav-branding,
  .top-nav-actions {
    width: 100%;
  }

  .top-nav-actions {
    justify-content: space-between;
    margin-left: 0;
    flex-wrap: wrap;
  }

  .top-nav-utilities {
    padding-left: 0;
    margin-left: 0;
    border-left: 0;
  }

  .menu-toggle.global-nav-toggle {
    display: flex;
  }

  .top-nav-links,
  .top-nav-utilities {
    display: none;
    width: 100%;
    gap: 0.4rem;
    flex-direction: column;
    justify-content: flex-start;
    padding: 0.6rem;
    border-radius: 1rem;
    background: linear-gradient(180deg, var(--nav-mobile-panel-start), var(--nav-mobile-panel-end));
    box-shadow: inset 0 0 0 1px var(--border-transparent);
  }

  .top-nav-links[data-open="true"],
  .top-nav-utilities[data-open="true"] {
    display: flex;
  }

  .top-nav-links > li,
  .top-nav-links > a,
  .top-nav-links .dropdown,
  .top-nav-utilities > li,
  .top-nav-utilities > a,
  .top-nav-utilities .dropdown {
    width: 100%;
  }

  .top-nav-links > li > a,
  .top-nav-links > li > button,
  .top-nav-links > a,
  .top-nav-utilities > li > a,
  .top-nav-utilities > li > button,
  .top-nav-utilities > a {
    width: 100%;
  }

  .top-nav-links > li > button,
  .top-nav-utilities > li > button {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .top-nav-links .dropdown-menu,
  .top-nav-utilities .dropdown-menu {
    position: static;
    display: none;
    min-width: 0;
    width: 100%;
    margin-top: 0.35rem;
    padding: 0.45rem;
    background: var(--nav-mobile-menu-surface);
    box-shadow: inset 0 0 0 999px var(--surface-transparent);
    border-radius: 0.75rem;
  }

  .top-nav-links .dropdown[data-mobile-open="true"] .dropdown-menu,
  .top-nav-utilities .dropdown[data-mobile-open="true"] .dropdown-menu {
    display: block;
  }

  .top-nav-links .dropdown-menu a,
  .top-nav-utilities .dropdown-menu a {
    border-radius: 0.65rem;
    padding-left: 1rem;
  }

  .cv-section-nav {
    top: 0;
  }

  .cv-section-nav .cv-section-nav__inner {
    flex-direction: column;
    align-items: stretch;
    padding: 0.5rem 1rem;
  }

  .cv-section-nav #nav-menu {
    display: none;
    flex-direction: column;
    width: 100%;
  }

  .cv-section-nav #nav-menu.open {
    display: flex;
  }

  .cv-section-nav .dropdown-menu {
    position: static;
    width: 100%;
    box-shadow: none;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    transition:
      max-height 0.3s ease-out,
      opacity 0.2s ease-out,
      visibility 0.2s ease-out;
  }

  .cv-section-nav .dropdown-open {
    max-height: 500px;
    opacity: 1;
    visibility: visible;
    transition:
      max-height 0.5s ease-in,
      opacity 0.3s ease-in,
      visibility 0.3s ease-in;
  }

  .cv-section-nav .dropdown-menu a {
    padding-left: 2rem;
  }
}
.shortcut-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-surface);
  padding: 0.5rem;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.shortcut-bar a {
  margin: 0 1rem;
  color: var(--secondary);
  font-size: 1.5rem;
  text-decoration: none;
  transition: var(--transition);
  background-color: var(--primary-soft);
  padding: 0.5rem;
  border-radius: 50%;
}

.shortcut-bar a:hover {
  color: var(--tertiary);
  background-color: var(--primary-soft);
}


/* Math 130 review layer */
:root {
  --review-bg: var(--surface-dim, #111614);
  --review-surface: var(--surface-container-low, #18201d);
  --review-surface-2: var(--surface-container-lowest, #1f2724);
  --review-border: var(--surface-container-highest, #2b3531);
  --review-accent: var(--secondary, #7ea8ff);
  --review-accent-soft: rgba(126, 168, 255, 0.12);
  --review-accent-glow: rgba(126, 168, 255, 0.25);
  --review-muted: var(--on-surface-variant, #bac4bf);
  --review-text: var(--on-surface, #f2f5f2);
  --review-shadow: 0 12px 36px color-mix(in srgb, var(--text-main) 18%, transparent);
  --review-grid: rgba(126, 168, 255, 0.03);
  --review-accent-hover: rgba(126, 168, 255, 0.3);
  --review-green-border: rgba(52, 211, 153, 0.2);
  --review-red-border: rgba(248, 113, 113, 0.2);
  --review-check-bg: rgba(52, 211, 153, 0.04);
  --review-check-border: rgba(52, 211, 153, 0.3);
  --review-got-border: rgba(52, 211, 153, 0.4);
  --review-miss-border: rgba(248, 113, 113, 0.4);
  --review-green-step: rgba(52, 211, 153, 0.25);
  --review-h1-from: var(--on-surface, #f2f5f2);
  --review-h1-to: var(--secondary, #7ea8ff);
  --review-body-muted: var(--on-surface-variant, #bac4bf);
  --review-semantic-body: var(--on-surface, #f2f5f2);
  --review-success: var(--emerald-main);
  --review-success-bg: var(--status-success-bg);
  --review-warning: var(--warning-main);
  --review-warning-bg: var(--status-warning-bg);
  --review-error: var(--danger-main);
  --review-error-bg: var(--status-error-bg);
  --review-info: var(--status-info);
  --review-info-bg: var(--status-info-bg);
  --review-radius: 16px;
  --review-shell-width: min(1100px, calc(100vw - 2rem));
}

body.review-page,
.math-review-page {
  /* Approved scoped bridge aliases for legacy Math 130 review markup only. */
  --bg: var(--review-bg);
  --surface: var(--review-surface);
  --surface2: var(--review-surface-2);
  --border: var(--review-border);
  --accent: var(--review-accent);
  --accent-soft: var(--review-accent-soft);
  --accent-glow: var(--review-accent-glow);
  --text: var(--review-text);
  --text-muted: var(--review-muted);
  --text-body-muted: var(--review-body-muted, var(--review-muted));
  --semantic-body: var(--review-semantic-body, var(--review-text));
  --green: var(--review-success);
  --green-bg: var(--review-success-bg);
  --amber: var(--review-warning);
  --amber-bg: var(--review-warning-bg);
  --red: var(--danger-main);
  --red-bg: var(--review-error-bg);
  --blue: var(--review-info);
  --blue-bg: var(--review-info-bg);
  --shadow: var(--review-shadow);
  --radius: var(--review-radius);
  --grid-line: var(--review-grid);
  --accent-hover: var(--review-accent-hover);
  --green-border: var(--review-green-border);
  --red-border: var(--review-red-border);
  --check-bg: var(--review-check-bg);
  --check-border: var(--review-check-border);
  --got-border: var(--review-got-border);
  --miss-border: var(--review-miss-border);
  --green-step: var(--review-green-step);
  --h1-from: var(--review-h1-from);
  --h1-to: var(--review-h1-to);
  font-family: var(--type-body-family);
  background: var(--bg-base);
  color: var(--text-main);
  line-height: var(--line-height-body);
  min-height: 100vh;
  transition: background-color 0.3s, color 0.3s;
}

body.review-page.light,
body.light .math-review-page,
.math-review-page.is-light {
  --review-bg: var(--surface, #f8faf7);
  --review-surface: var(--surface-container-lowest, var(--bg-surface));
  --review-surface-2: var(--surface-container-low, #f2f4f1);
  --review-border: rgba(192, 200, 196, 0.18);
  --review-accent: var(--secondary, var(--primary-main));
  --review-accent-soft: var(--primary-soft);
  --review-accent-glow: var(--primary-soft);
  --review-muted: var(--on-surface-variant, #3d4a44);
  --review-text: var(--on-surface, #001d17);
  --review-shadow: 0 8px 32px var(--border-transparent);
  --review-grid: var(--emerald-soft);
  --review-accent-hover: var(--primary-soft);
  --review-green-border: var(--emerald-soft);
  --review-red-border: rgba(220, 38, 38, 0.18);
  --review-check-bg: var(--emerald-soft);
  --review-check-border: color-mix(in srgb, var(--emerald-main) 30%, transparent);
  --review-got-border: color-mix(in srgb, var(--emerald-main) 40%, transparent);
  --review-miss-border: rgba(220, 38, 38, 0.35);
  --review-green-step: var(--emerald-soft);
  --review-h1-from: var(--primary, #001d17);
  --review-h1-to: var(--primary-container, #00342b);
  --review-body-muted: color-mix(in srgb, var(--on-surface-variant) 86%, var(--primary) 14%);
  --review-semantic-body: var(--on-surface, #001d17);
  --review-success: var(--emerald-main);
  --review-success-bg: var(--status-success-bg);
  --review-warning: var(--warning-main);
  --review-warning-bg: var(--status-warning-bg);
  --review-error: var(--danger-main);
  --review-error-bg: var(--status-error-bg);
  --review-info: var(--status-info);
  --review-info-bg: var(--status-info-bg);
}

/* Review-page banner header — mirrors .page-shell-header from the CV page */
.review-page-header {
  position: relative;
  overflow: hidden;
  background: var(--gradient-library-glow);
  color: var(--light-text);
  padding: clamp(1.75rem, 4vw, 2.75rem) 0;
  text-align: center;
}

.review-page-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--emerald-soft), var(--primary-soft));
  pointer-events: none;
}

.review-page-header .container {
  position: relative;
  z-index: 1;
}

.review-page-header h1,
.review-page-header h2 {
  color: var(--light-text);
}

/* Explicit overrides needed because the review system's .subtitle, .review-kicker etc.
   rules set color directly on the element, beating inherited color from the parent. */
.review-page-header .subtitle,
.review-page-header .review-subtitle,
.review-page-header .header-subtitle,
.review-page-header .page-shell-header__eyebrow,
.review-page-header p {
  color: var(--surface-transparent);
}

.review-page-header h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  margin-bottom: 0.35rem;
  font-family: var(--type-display-family);
  font-weight: 400;
}

.review-page-header .page-shell-header__eyebrow {
  margin-bottom: 0.6rem;
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: var(--meta-weight);
  letter-spacing: var(--meta-tracking);
  text-transform: uppercase;
  color: var(--surface-transparent);
  opacity: 1;
}

.review-page-header .subtitle {
  max-width: 42rem;
  margin-inline: auto;
  font-size: clamp(1rem, 2vw, 1.12rem);
}

/* Review shell when used with the page banner pattern */
.review-page .review-shell--below-banner {
  padding: var(--spacing-12) var(--container-space) var(--spacing-16);
  max-width: 1200px;
}

/* Long-page section mode: all tab-content visible, scroll-to navigation */
.review-page--sections .tab-content {
  display: block !important;
  animation: none !important;
  padding-top: var(--spacing-12);
  margin-bottom: var(--spacing-8);
  border-top: 1px solid var(--border-transparent);
  scroll-margin-top: 8rem;
}

.review-page--sections .tab-content:first-of-type {
  border-top: none;
  padding-top: var(--spacing-8);
}

.review-page--sections .section-heading-bar {
  margin-bottom: var(--spacing-6);
}

.review-page--sections .section-heading-bar h2 {
  font-family: var(--type-display-family);
  font-weight: 400;
  font-size: 1.65rem;
  margin: 0 0 0.35rem;
}

.review-page--sections .section-heading-bar .section-kicker {
  margin-bottom: 0.5rem;
}

/* MATH 130 unit pathways: the primary learn -> practice -> checkpoint route */
.learning-path {
  display: grid;
  gap: var(--spacing-6);
}

.learning-path__header {
  display: grid;
  gap: 0.65rem;
  max-width: 78ch;
}

.learning-path__eyebrow,
.learning-step__meta,
.learning-path__status {
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.learning-path__eyebrow,
.learning-step__meta {
  color: var(--primary-main);
}

.learning-path__header h2,
.learning-step h3,
.learning-path__bridge h3 {
  margin: 0;
  font-family: var(--type-display-family);
}

.learning-path__header p,
.learning-step p,
.learning-path__bridge p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.6;
}

.learning-path__status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.learning-path__status {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0.32rem 0.68rem;
  border: 1px solid color-mix(in srgb, var(--primary-main) 32%, var(--border-subtle));
  border-radius: 999px;
  background: color-mix(in srgb, var(--primary-main) 8%, var(--bg-surface));
  color: var(--text-main);
}

.learning-path__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 245px), 1fr));
  gap: 1rem;
}

.learning-step {
  position: relative;
  display: grid;
  align-content: start;
  gap: 0.75rem;
  min-height: 100%;
  padding: 1.1rem;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  border-radius: var(--site-card-radius, 0.85rem);
  background: var(--gradient-card-surface, var(--bg-surface));
  box-shadow: var(--shadow);
}

.learning-step::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-main), transparent);
}

.learning-step--assessment::before {
  background: linear-gradient(90deg, var(--emerald-main), transparent);
}

.learning-step__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: auto;
  padding-top: 0.25rem;
}

.learning-step__actions a,
.learning-step__actions button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0.55rem 0.72rem;
  border: 1px solid var(--primary-main);
  border-radius: 0.55rem;
  background: transparent;
  color: var(--primary-main);
  font: 700 0.82rem var(--type-body-family);
  text-decoration: none;
  cursor: pointer;
}

.learning-step__actions .learning-action--primary {
  background: var(--primary-main);
  color: #fff;
}

.learning-step__actions a:hover,
.learning-step__actions button:hover,
.learning-step__actions a:focus-visible,
.learning-step__actions button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px color-mix(in srgb, var(--primary-main) 20%, transparent);
}

.learning-path__bridge {
  display: grid;
  gap: 0.65rem;
  padding: 1rem 1.1rem;
  border: 1px solid color-mix(in srgb, var(--warning-main) 50%, var(--border-subtle));
  border-left-width: 5px;
  border-radius: 0.75rem;
  background: color-mix(in srgb, var(--warning-main) 8%, var(--bg-surface));
  scroll-margin-top: 9rem;
}

.learning-path__readiness {
  padding: 0.85rem 1rem;
  border-radius: 0.7rem;
  background: color-mix(in srgb, var(--emerald-main) 9%, var(--bg-surface));
  color: var(--text-main);
  line-height: 1.55;
}

.learning-path__library {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}

.learning-path__library > summary {
  cursor: pointer;
  color: var(--primary-main);
  font-weight: 800;
}

.learning-library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr));
  gap: 0.8rem;
  margin-top: 1rem;
}

.learning-library-card {
  display: grid;
  gap: 0.55rem;
  padding: 0.9rem;
  border: 1px solid var(--border-subtle);
  border-radius: 0.7rem;
  background: var(--bg-surface);
}

.learning-library-card strong {
  color: var(--text-main);
}

.learning-library-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.learning-library-card__links a {
  color: var(--primary-main);
  font-size: 0.85rem;
  font-weight: 700;
}

@media (max-width: 640px) {
  .learning-step__actions {
    flex-direction: column;
  }

  .learning-step__actions a,
  .learning-step__actions button {
    width: 100%;
  }
}

/* Reuse cv-section-nav on review pages */
.review-section-nav {
  position: sticky;
  top: 4.6rem;
  z-index: 900;
  background: linear-gradient(180deg, color-mix(in srgb, var(--glass-surface) 92%, transparent), color-mix(in srgb, var(--bg-base) 94%, transparent));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: inset 0 -1px 0 var(--border-transparent);
}

.review-page .tab-content {
  scroll-margin-top: 9rem;
}

.review-section-nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem var(--container-space);
  overflow-x: auto;
  scrollbar-width: none;
}

.review-section-nav__inner::-webkit-scrollbar {
  display: none;
}

.review-section-nav__inner a {
  display: block;
  padding: 0.7rem 0.9rem;
  color: var(--text-muted);
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 999px;
  white-space: nowrap;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s ease;
}

.review-section-nav__inner a:hover,
.review-section-nav__inner a:focus-visible {
  background: color-mix(in srgb, var(--primary-main) 12%, var(--bg-surface));
  color: var(--text-main);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary-main) 26%, var(--border-subtle));
  outline: none;
}

.review-section-nav__inner a.is-active {
  background: var(--primary-main);
  color: #ffffff;
  box-shadow: 0 8px 20px color-mix(in srgb, var(--primary-main) 24%, transparent);
}

.review-section-nav__inner a.is-active:hover,
.review-section-nav__inner a.is-active:focus-visible {
  background: color-mix(in srgb, var(--primary-main) 86%, black);
  color: #ffffff;
}

@media (max-width: 640px) {
  .review-page-header {
    padding: clamp(1.25rem, 3vw, 1.75rem) 0;
  }

  .review-section-nav {
    top: 9.95rem;
  }

  .review-page .tab-content {
    scroll-margin-top: 14rem;
  }

  .learning-path__bridge {
    scroll-margin-top: 14rem;
  }
}


.math-review-page {
  position: relative;
  width: 100%;
  font-family: var(--type-body-family);
  color: var(--text-main);
  isolation: isolate;
  background:
    radial-gradient(circle at top, color-mix(in srgb, var(--surface-tint) 10%, transparent), transparent 36%),
    var(--bg-base);
}

.math-review-page .container,
.math-review-page main,
.math-review-page section,
.math-review-page header {
  position: relative;
  z-index: 1;
}


.review-shell {
  width: var(--review-shell-width);
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
  position: relative;
  z-index: 1;
}

.review-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.6rem;
  padding-bottom: 1.35rem;
  position: relative;
}


.review-title-group { max-width: 52rem; }
.review-header h1,
.math-review-page h1.review-title,
.review-page h1.review-title {
  font-family: var(--type-display-family);
  font-weight: 400;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.05;
  color: var(--primary-main);
  margin: 0 0 0.35rem;
}
.math-review-page h2,
.math-review-page h3,
.math-review-page h4,
.review-page h2,
.review-page h3,
.review-page h4 { font-family: var(--type-display-family); font-weight: 400; }
.math-review-page h2,
.review-page h2 { font-size: 1.8rem; margin-bottom: 1.5rem; }
.review-kicker, .course-label { font-family: var(--type-meta-family); font-size: var(--meta-sm); font-weight: var(--meta-weight); letter-spacing: calc(var(--meta-tracking) + 0.04em); text-transform: uppercase; color: color-mix(in srgb, var(--primary-main) 72%, var(--text-body-muted)); margin-bottom: 0.55rem; }
.review-subtitle, .header-subtitle, .subtitle { color: var(--text-body-muted); font-size: 0.98rem; max-width: 52rem; }
.review-meta-chips, .header-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.75rem;
}
.review-chip, .header-chip, .chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.42rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: color-mix(in srgb, var(--bg-surface) 92%, var(--bg-surface));
  color: var(--text-body-muted);
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: var(--meta-weight);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1;
}
.review-chip i, .header-chip i, .chip i { width: 0.9rem; height: 0.9rem; color: var(--primary-main); flex-shrink: 0; }
.review-chip.is-accent, .header-chip.accent, .chip.accent { background: color-mix(in srgb, var(--primary-main) 14%, var(--bg-surface)); border-color: color-mix(in srgb, var(--primary-main) 32%, var(--border-subtle)); color: var(--text-main); }
.review-chip.is-accent i, .header-chip.accent i, .chip.accent i { color: var(--primary-main); }
.review-header-actions { display:flex; align-items:flex-start; justify-content:flex-end; }
.review-theme-toggle, .theme-toggle {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.review-theme-toggle:hover, .theme-toggle:hover { border-color: var(--primary-main); transform: translateY(-1px); }

.tabs.review-tabs, .tab-nav.review-tabs {
  display: grid;
  gap: 0.75rem;
  margin: 1.1rem 0 1.25rem;
}
.tabs.review-tabs.review-tabs-3, .tab-nav.review-tabs.review-tabs-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.tabs.review-tabs.review-tabs-4, .tab-nav.review-tabs.review-tabs-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.tab-btn.review-tab-btn, .review-tabs .tab-btn {
  background: linear-gradient(180deg, var(--bg-surface), var(--bg-surface));
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 0.9rem 1rem;
  border-radius: 16px;
  font-family: var(--type-body-family);
  font-size: 0.98rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-align: left;
  min-height: 78px;
  box-shadow: 0 6px 18px color-mix(in srgb, var(--text-main) 6%, transparent);
}
.review-tabs .tab-btn.priority, .review-tabs .tab-btn.is-priority { position: relative; }
.review-tabs .tab-btn.priority::before, .review-tabs .tab-btn.is-priority::before {
  content: '';
  position: absolute;
  top: 0;
  left: 18px;
  right: 18px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary-main), transparent);
  opacity: 0.85;
}
.tab-btn.review-tab-btn:hover, .review-tabs .tab-btn:hover { transform: translateY(-2px); border-color: color-mix(in srgb, var(--primary-main) 35%, var(--border-subtle)); box-shadow: 0 10px 24px color-mix(in srgb, var(--text-main) 10%, transparent); }
.tab-btn.review-tab-btn.active, .review-tabs .tab-btn.active { border-color: var(--primary-main); background: linear-gradient(180deg, color-mix(in srgb, var(--primary-main) 18%, var(--bg-surface)), color-mix(in srgb, var(--primary-main) 8%, var(--bg-surface))); box-shadow: 0 10px 24px var(--accent-glow); color: var(--text-main); }
.review-tab-icon, .tab-icon, .tab-icon-wrap {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--primary-main) 12%, var(--bg-surface));
  color: var(--primary-main);
  flex-shrink: 0;
}
.review-tabs .tab-btn.active .review-tab-icon,
.review-tabs .tab-btn.active .tab-icon,
.review-tabs .tab-btn.active .tab-icon-wrap { background: color-mix(in srgb, var(--primary-main) 22%, var(--bg-surface)); }
.review-tabs .tab-btn.active .review-tab-label,
.review-tabs .tab-btn.active .tab-label { color: var(--text-main); }
.review-tabs .tab-btn.active .review-tab-meta,
.review-tabs .tab-btn.active .tab-meta,
.review-tabs .tab-btn.active .tab-sub { color: var(--text-body-muted); }
.review-tab-copy, .tab-copy { display:flex; flex-direction:column; gap:0.1rem; min-width:0; }
.review-tab-label, .tab-label { color: var(--text-main); font-weight: 700; line-height: 1.2; }
.review-tab-meta, .tab-meta, .tab-sub { color: var(--text-body-muted); font-size: 0.82rem; line-height: 1.25; }
.math-review-page .tab-content,
.review-page .tab-content { display:none; }
.math-review-page .tab-content.active,
.review-page .tab-content.active { display:block; animation: fadeUp 0.28s ease; }

.card {
  position: relative;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--bg-base) 96%, transparent), color-mix(in srgb, var(--bg-base) 94%, transparent));
  border-radius: var(--radius-lg);
  box-shadow: inset 0 0 0 1px var(--border-transparent);
}

.review-panel, .review-card, .formula-section, .info-card, .practice-stat, .problem-card, .topic-card, .section-summary-card {
  position: relative;
  background: linear-gradient(180deg, var(--bg-surface), color-mix(in srgb, var(--bg-surface) 78%, var(--bg-surface)));
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 1px var(--border-transparent);
}
.review-panel::before, .review-card::before, .card::before, .formula-section::before, .section-summary-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--surface-transparent);
  pointer-events: none;
}
.review-panel > *, .review-card > *, .card > *, .formula-section > *, .section-summary-card > * { position: relative; z-index: 1; }
.review-card, .formula-section { padding: var(--spacing-6); margin-bottom: 1.5rem; }
.card { padding: var(--spacing-6); margin-bottom: 1.5rem; }

.review-checklist-section, .checklist-section { margin-bottom: var(--spacing-8); }
.review-checklist-section > h3, .checklist-section > h3 { font-family: var(--type-body-family); font-size: 1.2rem; color: var(--primary-main); margin-bottom: 1rem; padding-bottom: 0.7rem; background: linear-gradient(180deg, transparent calc(100% - 0.45rem), var(--primary-soft)); }
.review-checklist-row, .check-item, .checklist-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  box-sizing: border-box;
  padding: 1rem;
  background: var(--bg-surface);
  box-shadow: inset 0 0 0 1px var(--border-transparent);
  border-radius: 12px;
  transition: all 0.2s;
}

.checklist-grid .check-item.video-link,
.checklist-grid .check-item.review-video-link {
  margin: 0;
}

.review-formula-box, .formula-box {
  background: var(--bg-surface);
  box-shadow: inset 0 0 0 1px var(--border-transparent);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin: 0.6rem 0;
}
.review-formula-section, .formula-section { padding: 1.4rem; }
.review-formula-grid, .formula-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0.75rem; }

.review-progress-track, .progress-bar-track, .quiz-progress-bar {
  background: var(--border-subtle);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}
.review-progress-fill, .progress-bar-fill, .quiz-progress-fill {
  height: 100%;
  border-radius: inherit;
  background: var(--primary-main);
  transition: width 0.4s ease;
}
.review-progress-fill.is-complete, .progress-bar-fill.complete { background: var(--emerald-main); }

.review-video-link, .video-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0.75rem 0;
  padding: 0.85rem 1rem;
  background: var(--bg-surface);
  box-shadow: inset 0 0 0 1px var(--border-transparent);
  border-radius: 10px;
  color: var(--text-main);
  text-decoration: none;
  transition: all 0.2s;
}
.review-video-link span, .video-link span { color: var(--text-main); font-weight: 500; }
.review-video-link:visited, .video-link:visited { color: var(--text-main); }
.review-video-link:visited span, .video-link:visited span { color: var(--text-main); }
.review-video-link i[data-lucide], .video-link i[data-lucide] { color: var(--green, var(--primary-main)) !important; flex-shrink: 0; opacity: 0.85; }
.review-video-link:hover, .video-link:hover { box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--green, var(--primary-main)) 38%, transparent); }
.review-video-link:hover i[data-lucide], .video-link:hover i[data-lucide] { opacity: 1; }
.review-video-link.watched, .video-link.watched { box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--green, var(--primary-main)) 32%, transparent); background: var(--emerald-soft); }
.review-video-link.watched i[data-lucide], .video-link.watched i[data-lucide] { color: var(--green, var(--primary-main)) !important; opacity: 0.5; }
.review-video-link.watched span, .video-link.watched span { opacity: 0.5; text-decoration: line-through; }
.review-video-link::after, .video-link::after { content: '↗'; font-size: 0.8rem; color: var(--text-main); opacity: 0.35; margin-left: auto; padding-left: 0.5rem; flex-shrink: 0; }

.review-callout {
  padding: 1rem 1.1rem;
  margin: 1rem 0;
  border-radius: 14px;
  box-shadow: inset 0 0 0 1px var(--border-transparent);
  background: linear-gradient(135deg, var(--surface-transparent), var(--bg-surface));
}
.review-callout--exam { text-align:center; box-shadow: inset 0 0 0 1px var(--primary-soft); background: linear-gradient(135deg, color-mix(in srgb, var(--primary-main) 16%, var(--bg-surface)), color-mix(in srgb, var(--bg-surface) 88%, var(--bg-surface))); }
.review-callout--tip, .tip-box,
.review-callout--warning, .warning-box,
.review-callout--info,
.review-callout--success { color: var(--semantic-body); }
.review-callout--tip, .tip-box { background: var(--status-warning-bg); border-left: 4px solid var(--status-warning-border); }
.review-callout--warning, .warning-box { background: var(--status-error-bg); border-left: 4px solid var(--status-error-border); }
.review-callout--info { background: var(--status-info-bg); border-left: 4px solid var(--status-info-border); }
.review-callout--success { background: var(--status-success-bg); border-left: 4px solid var(--status-success-border); }
.review-callout--tip i, .tip-box i, .review-callout--tip strong, .tip-box strong { color: var(--warning-main); }
.review-callout--warning i, .warning-box i, .review-callout--warning strong, .warning-box strong { color: var(--danger-main); }
.review-callout--info i, .review-callout--info strong { color: var(--status-info); }
.review-callout--success i, .review-callout--success strong { color: var(--emerald-main); }
.review-summary-card, .section-summary-card { padding: 1rem 1.1rem; }
.review-stack-gap { margin-top: 2rem; }
.review-link-reset, .video-link.review-link-reset { text-decoration: none; }

.u-text-center { text-align: center; }
.u-mb-0 { margin-bottom: 0; }
.u-mb-xs { margin-bottom: 0.5rem; }
.u-mb-sm { margin-bottom: 0.6rem; }
.u-mb-md { margin-bottom: 1rem; }
.u-mb-lg { margin-bottom: var(--spacing-8); }

.section-lead--center { text-align: center; justify-items: center; }
.section-lead--center h2,
.section-lead--center p { text-align: center; }
.section-lead--results h2 { text-align: center; }


.review-callout--padded { padding: 1.35rem 1.5rem; }

.review-progress-track--sm { height: 10px; }
.review-progress-fill--animated { width: 0%; transition: width 0.4s ease; }

.btn-ghost-muted {
  display: inline-flex;
  align-items: center;
  background: none;
  border: 1px solid var(--text-muted);
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.85rem;
}

.exam-countdown-pill {
  background: var(--danger-soft);
  border: 1px solid var(--danger-main);
  color: var(--danger-main);
  padding: 0.5rem 1rem;
  border-radius: 12px;
  font-weight: 600;
  font-family: var(--type-meta-family);
  font-size: 0.95rem;
}

.section-card {
  background: var(--bg-base);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--spacing-4);
}

.table-compact th,
.table-compact td {
  padding: 0.3rem 0.45rem;
  font-size: 0.9rem;
}

.table-scroll { overflow-x: auto; }
.icon-accent { color: var(--primary-main); }
.quiz-box--active-shell { border-top: 1px solid var(--border-subtle); padding-top: 2rem; }

.u-hidden { display: none !important; }
.u-mt-md { margin-top: 1rem; }
.u-mt-xl { margin-top: 3rem; }
.u-ml-auto { margin-left: auto; }
.u-gap-xs { gap: 0.5rem; }
.u-gap-sm { gap: 0.75rem; }
.u-gap-md { gap: 1rem; }
.u-flex-between-center { display: flex; justify-content: space-between; align-items: center; }
.u-flex-between-center-wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.u-flex-align-center-wrap { display: flex; align-items: center; flex-wrap: wrap; }
.u-text-accent-strong { font-weight: 600; color: var(--primary-main); }
.u-meta-muted-sm { font-family: var(--type-meta-family); color: var(--text-muted); font-size: 0.9rem; }
.u-text-muted-meta { color: var(--text-muted); font-size: 0.95rem; font-weight: 500; }
.review-callout--highlight {
  box-shadow: inset 0 0 0 1px var(--primary-soft);
  background: linear-gradient(180deg, color-mix(in srgb, var(--primary-main) 10%, var(--bg-surface)), var(--bg-surface));
}
.review-callout__title { font-family: var(--type-display-family); font-size: 1.25rem; margin-bottom: 0.75rem; }
.review-callout__title--exam { font-size: 1.4rem; margin-bottom: 0.5rem; }
.review-callout__body { color: var(--text-body-muted, var(--text-muted)); margin-bottom: 1rem; }
.review-callout__body--sm { font-size: 0.9rem; }
.review-callout__body--md { font-size: 0.95rem; }

.review-option-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0.75rem; }
.review-option-button { padding: 0.85rem; text-align: left; border-radius: 12px; }
.review-option-title { font-weight: 600; margin-bottom: 2px; }
.review-option-copy { font-size: 0.8rem; color: var(--text-body-muted, var(--text-muted)); }

.review-results-score { text-align: center; font-size: 3rem; font-family: var(--type-meta-family); color: var(--primary-main); margin: 1rem 0; }
.review-results-actions { text-align: center; margin-top: 1.5rem; }

.review-formula-section,
.formula-section {
  break-inside: avoid;
}



@media print {
  body.review-page,
  .math-review-page {
    background: var(--bg-surface) !important;
    color: var(--text-main) !important;
  }


  .math-review-page {
    width: 100%;
  }

  .math-review-page .review-card,
  .math-review-page .card,
  .math-review-page .formula-section,
  .math-review-page .review-callout,
  .math-review-page .formula-card,
  .math-review-page .formula-item {
    background: var(--bg-surface) !important;
    box-shadow: none !important;
    color: var(--text-main) !important;
    border-color: #cbd5e1 !important;
  }

  .math-review-page .review-theme-toggle,
  .math-review-page .theme-toggle,
  .math-review-page .tabs.review-tabs,
  .math-review-page .quiz-selector,
  .math-review-page .btn-primary,
  .math-review-page .btn-secondary {
    display: none !important;
  }

  .math-review-page .formula-box,
  .math-review-page .review-formula-box,
  .math-review-page .formula-math {
    overflow: visible !important;
    break-inside: avoid;
    page-break-inside: avoid;
  }
}

@media (max-width: 1024px) {
  .tabs.review-tabs.review-tabs-3, .tab-nav.review-tabs.review-tabs-3, .tabs.review-tabs.review-tabs-4, .tab-nav.review-tabs.review-tabs-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .review-shell { width: min(100vw - 1rem, 100%); padding: 1rem 1rem 3rem; }
  .review-header { flex-direction: column; align-items: flex-start; }
  .review-meta-chips, .header-chips { margin-top: 0.65rem; }
  .review-chip, .header-chip, .chip { width: 100%; justify-content: flex-start; }
  .tabs.review-tabs.review-tabs-3, .tab-nav.review-tabs.review-tabs-3, .tabs.review-tabs.review-tabs-4, .tab-nav.review-tabs.review-tabs-4 { grid-template-columns: 1fr; }
  .review-tabs .tab-btn { min-height: auto; }
}

/* Math 130 course dashboard */
body.math130-course-page {
  background:
    radial-gradient(circle at top, var(--emerald-soft), transparent 28%),
    linear-gradient(180deg, rgba(220, 230, 224, 0.24), transparent 24%),
    var(--background-color);
}

/* Math 130 header — mirrors .page-shell-header / .cv-hero */
.math130-header {
  padding: clamp(2.8rem, 6vw, 4.5rem) 0;
}

.math130-header__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.9fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

.math130-header__identity h1 {
  margin-bottom: 0.4rem;
}

.math130-header__identity .subtitle {
  margin: 0;
  font-size: clamp(1rem, 2vw, 1.15rem);
  max-width: 42rem;
}

.math130-header .page-shell-header__eyebrow,
.math130-header .subtitle,
.math130-header__subtitle,
.math130-header__identity .subtitle {
  color: var(--hero-on-dark-muted);
  opacity: 1;
}

.math130-header__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1.25rem;
}

.math130-header__chip {
  display: inline-flex;
  align-items: center;
  padding: 0.38rem 0.72rem;
  border-radius: 999px;
  background: var(--hero-chip-bg);
  box-shadow: inset 0 0 0 1px var(--hero-chip-border);
  color: var(--hero-on-dark);
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: var(--meta-weight);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1;
}

.math130-header__chip--accent {
  background: var(--hero-chip-bg-accent);
  box-shadow: inset 0 0 0 1px var(--hero-chip-border);
}

.math130-header__usage {
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--hero-panel-bg), var(--hero-panel-bg-strong));
  box-shadow: inset 0 0 0 1px var(--hero-panel-border);
  color: var(--hero-on-dark);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.math130-header__usage h2 {
  font-size: 1.3rem;
  margin-bottom: 0.85rem;
  color: var(--hero-on-dark);
  opacity: 1;
}

.math130-summary-list {
  display: grid;
  gap: 0.75rem;
  padding-left: 0;
  list-style: none;
  margin: 0;
}

.math130-summary-list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--hero-on-dark);
  opacity: 1;
}

.math130-summary-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--hero-bullet);
  font-weight: 700;
}

.math130-header h1,
.math130-header .subtitle,
.math130-header__usage h2,
.math130-summary-list li {
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.18);
}

/* Dashboard content area — mirrors .cv-page */
.math130-dashboard {
  padding-top: var(--spacing-12);
  padding-bottom: var(--spacing-12);
}

.math130-progress {
  margin-bottom: 0;
}

.math130-section-heading {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: end;
  margin-bottom: var(--spacing-8);
  padding-bottom: var(--spacing-6);
  border-bottom: 1px solid var(--border-transparent);
}

.math130-section-heading .section-kicker {
  margin-bottom: 0.5rem;
}

.math130-section-heading h2 {
  margin: 0;
  font-family: var(--type-display-family);
  font-weight: 400;
}

.math130-section-heading__sub {
  max-width: 28rem;
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  text-align: right;
}

/* Unit grid — mirrors CV entry cards */
.math130-unit-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-6);
}

.math130-unit-card {
  display: flex;
  flex-direction: column;
  background: var(--gradient-card-surface);
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  transition: var(--transition);
  outline: 1px solid transparent;
  min-height: 100%;
}

.math130-unit-card:hover {
  box-shadow: 0 18px 36px var(--border-transparent);
  outline-color: color-mix(in srgb, var(--bg-surface) 18%, var(--border-subtle));
  transform: translateY(-2px);
}

.math130-unit-card--priority {
  position: relative;
}

.math130-unit-card--priority::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background: linear-gradient(90deg, var(--bg-surface), transparent 70%);
}

.math130-unit-card__copy {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  flex: 1;
}

.math130-unit-card__label {
  font-weight: 700;
  color: var(--secondary);
  font-size: 1.02rem;
  line-height: 1.2;
}

.math130-unit-card__meta {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.4;
}

.math130-meta-stack {
  display: grid;
  gap: 0.5rem;
  width: 100%;
  color: var(--text-muted);
  font-size: 0.86rem;
  line-height: 1.45;
  margin-top: auto;
  padding-top: 0.5rem;
}

.math130-meta-stack strong {
  color: var(--secondary);
}

.math130-unit-card__button {
  margin-top: 0.75rem;
  width: 100%;
}

@media (max-width: 980px) {
  .math130-header__grid {
    grid-template-columns: 1fr;
  }

  .math130-unit-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .math130-section-heading {
    flex-direction: column;
    align-items: flex-start;
  }

  .math130-section-heading__sub {
    max-width: none;
    text-align: left;
  }
}

@media (max-width: 640px) {
  .math130-unit-grid {
    grid-template-columns: 1fr;
  }

  .math130-dashboard {
    padding-top: var(--spacing-8);
    padding-bottom: var(--spacing-8);
  }
}


/* CV page refinements */
.cv-page {
  padding-top: var(--spacing-10);
  padding-bottom: var(--spacing-12);
}

.cv-hero {
  padding: clamp(2.8rem, 6vw, 4.5rem) 0;
}

.cv-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: center;
  text-align: left;
}

.cv-hero__identity h1 {
  margin-bottom: 0.35rem;
}

.cv-hero__identity .subtitle {
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  max-width: 38rem;
}

.cv-hero .page-shell-header__eyebrow,
.cv-hero__identity .subtitle {
  color: var(--hero-on-dark-muted);
  opacity: 1;
}

.page-shell-header--profile .contact-info {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  justify-content: flex-start;
  margin-top: 1.35rem;
}

.page-shell-header--profile .contact-item {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 0.65rem;
  min-height: 3rem;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  background: var(--hero-contact-bg);
  box-shadow: inset 0 0 0 1px var(--hero-contact-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.page-shell-header--profile .contact-item--wide {
  grid-column: 1 / -1;
  border-radius: 1rem;
}

.page-shell-header--profile .contact-item i {
  font-size: 0.95rem;
  color: var(--hero-contact-icon);
  opacity: 1;
}

.page-shell-header--profile .contact-label {
  font-family: var(--type-meta-family);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--hero-contact-label);
}

.page-shell-header--profile .contact-item a,
.page-shell-header--profile .contact-item span:last-child {
  color: var(--hero-contact-value);
  text-decoration-color: currentColor;
  text-decoration-thickness: 0.08em;
  font-weight: 500;
}

.cv-intro {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(16rem, 0.95fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
  margin-bottom: var(--section-space);
  padding-bottom: var(--spacing-10);
  border-bottom: 1px solid var(--border-transparent);
}

.cv-intro__main h2,
.cv-section__header h2 {
  margin-bottom: 0.8rem;
}

.cv-intro__main p,
.cv-entry p,
.cv-entry li,
.cv-section > p {
  max-width: 72ch;
}

.cv-facts-rail {
  display: grid;
  gap: var(--spacing-6);
  padding-top: 0.2rem;
}

.cv-fact-group {
  padding-left: var(--spacing-5);
  border-left: 2px solid var(--border-transparent);
}

.cv-fact-group h3 {
  margin-bottom: 0.65rem;
  font-size: 1rem;
}

.cv-fact-group--featured {
  border-left-color: color-mix(in srgb, var(--bg-surface) 48%, var(--surface-tint));
}

.cv-section {
  margin-bottom: var(--section-space);
}

.cv-section__header {
  margin-bottom: var(--spacing-6);
}

.cv-subsection-title {
  margin: var(--spacing-8) 0 var(--spacing-6);
}

.section-kicker {
  margin: 0 0 0.5rem;
  font-family: var(--type-meta-family);
  font-size: var(--meta-sm);
  font-weight: var(--meta-weight);
  letter-spacing: var(--meta-tracking);
  text-transform: uppercase;
  color: var(--bg-surface);
}

.cv-entries {
  display: grid;
  gap: var(--spacing-6);
}

.cv-entry {
  padding-bottom: var(--spacing-6);
  border-bottom: 1px solid var(--border-transparent);
}

.cv-entry:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.cv-entry--current .item-title::after {
  content: 'Current';
  display: inline-flex;
  align-items: center;
  margin-left: 0.75rem;
  padding: 0.16rem 0.55rem;
  border-radius: 999px;
  font-family: var(--type-meta-family);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bg-surface);
  background: color-mix(in srgb, var(--bg-surface) 12%, var(--bg-surface) 88%);
  vertical-align: middle;
}

.cv-entry--citation {
  padding-bottom: var(--spacing-4);
}

.cv-entry--citation p {
  margin: 0;
}

.compact-list,
.award-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.compact-list li,
.award-list li {
  position: relative;
  padding-left: 1.1rem;
}

.compact-list li + li,
.award-list li + li {
  margin-top: 0.6rem;
}

.compact-list--tight li + li {
  margin-top: 0.45rem;
}

.compact-list li::before,
.award-list li::before {
  content: "";
  position: absolute;
  top: 0.7rem;
  left: 0;
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--bg-surface) 70%, var(--surface-tint));
}

.cv-split-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-8);
}

.item-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  column-gap: 1.25rem;
  row-gap: 0.35rem;
  margin-bottom: 0.35rem;
}

.item-title {
  font-weight: 700;
  color: var(--secondary);
  font-size: 1.02rem;
}

.item-date {
  min-width: 8.5rem;
  text-align: right;
  font-family: var(--type-meta-family);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.item-subtitle {
  font-style: normal;
  font-family: var(--type-meta-family);
  color: var(--text-muted);
  font-size: 0.93rem;
  margin-bottom: 0.35rem;
}

.item-note {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.93rem;
}

.cv-section-nav #nav-menu > li > .cv-nav-link {
  display: block;
  padding: 0.8rem 1rem;
  color: var(--secondary);
  font-weight: 600;
  border-radius: 999px;
  background: transparent;
  border: none;
  font: inherit;
  cursor: pointer;
  text-decoration: none;
}

.cv-section-nav #nav-menu > li > .cv-nav-link:hover,
.cv-section-nav #nav-menu > li > .cv-nav-link:focus-visible {
  background: var(--primary-soft);
  color: var(--bg-surface);
  outline: none;
}

.download-container {
  display: flex;
  justify-content: flex-end;
  margin-top: calc(var(--spacing-8) * -0.25);
  margin-bottom: var(--spacing-8);
}

.download-btn {
  background: transparent;
  color: var(--secondary);
  border: 1px solid var(--border-transparent);
  box-shadow: none;
  font-weight: 600;
  padding: 0.75rem 1.1rem;
}

.download-btn:hover,
.download-btn:focus-visible {
  background: var(--primary-soft);
  color: var(--secondary);
  transform: none;
}

@media (max-width: 900px) {
  .cv-hero__grid,
  .cv-intro,
  .cv-split-list {
    grid-template-columns: 1fr;
  }

  .page-shell-header--profile .contact-info {
    grid-template-columns: 1fr;
  }

  .page-shell-header--profile .contact-item,
  .page-shell-header--profile .contact-item--wide {
    grid-column: auto;
    border-radius: 1rem;
  }
}

@media (max-width: 768px) {
  .item-header {
    grid-template-columns: 1fr;
  }

  .item-date {
    min-width: 0;
    text-align: left;
  }

  .cv-section-nav #nav-menu > li > .cv-nav-link {
    width: 100%;
    text-align: left;
  }

  .download-container {
    justify-content: flex-start;
  }
}

}

/* === layout.css === */
@layer layout {
  .site-main,
  .page-shell-main.site-main {
    width: min(var(--site-max-width), calc(100% - 2rem));
    max-width: var(--site-max-width);
    margin-inline: auto;
    padding-block: clamp(2rem, 4vw, 3.5rem);
    min-width: 0;
  }

  .site-main > * + * {
    margin-top: var(--site-section-gap);
  }

  .site-section {
    margin: 0;
  }

  .site-main > .site-section + .site-section {
    margin-top: var(--site-section-gap);
  }

  .section-header {
    max-width: 46rem;
    margin-bottom: clamp(1.25rem, 3vw, 2rem);
  }

  .section-header--split {
    max-width: none;
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 1.5rem;
  }

  .section-header h2 {
    margin-bottom: 0.45rem;
  }

  .section-header p {
    margin: 0;
    color: var(--text-muted);
  }

  .page-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.35rem;
  }

  .page-actions .button {
    margin-top: 0;
  }

  .page-hero {
    position: relative;
    overflow: hidden;
    background: var(--gradient-library-glow);
    color: var(--hero-on-dark, #f8faf7);
    padding: clamp(2.75rem, 6vw, 5rem) 0;
  }

  .page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--emerald-soft), var(--primary-soft));
    pointer-events: none;
  }

  .page-hero > .container,
  .page-hero__inner {
    position: relative;
    z-index: 1;
  }

  .page-hero__inner {
    width: min(var(--site-max-width), calc(100% - 2rem));
    max-width: var(--site-max-width);
    margin-inline: auto;
    min-width: 0;
  }

  .page-hero__eyebrow {
    margin: 0 0 0.65rem;
    font-family: var(--type-meta-family);
    font-size: var(--meta-sm);
    font-weight: var(--meta-weight);
    letter-spacing: var(--meta-tracking);
    text-transform: uppercase;
    color: var(--hero-on-dark-muted, rgba(248, 250, 247, 0.92));
  }

  .page-hero h1 {
    max-width: 58rem;
    margin: 0;
    color: var(--hero-on-dark, #f8faf7);
    overflow-wrap: anywhere;
  }

  .page-hero__lede {
    max-width: 48rem;
    margin: 0.8rem 0 0;
    color: var(--hero-on-dark-muted, rgba(248, 250, 247, 0.92));
    font-size: clamp(1.02rem, 2vw, 1.18rem);
  }

  .page-hero .button-secondary {
    background: rgba(248, 250, 247, 0.14);
    color: var(--hero-on-dark, #f8faf7);
    border-color: rgba(248, 250, 247, 0.28);
  }

  @media (max-width: 760px) {
    body {
      overflow-x: clip;
    }

    .page-hero {
      padding-block: clamp(2rem, 8vw, 3rem);
    }

    .site-main,
    .page-hero__inner {
      width: calc(100vw - 2rem);
      max-width: calc(100vw - 2rem);
    }

    .page-hero h1 {
      max-width: 100%;
      font-size: clamp(1.9rem, 8vw, 2.25rem);
      line-height: 1.12;
    }

    .section-header--split {
      display: block;
    }

    .page-actions .button {
      width: 100%;
      justify-content: center;
      text-align: center;
    }
  }
}

/* === navigation.css === */
@layer navigation {
  .top-nav-inner {
    max-width: var(--site-max-width);
  }

  .top-nav-links > li > a,
  .top-nav-links > li > button,
  .top-nav-utilities > li > a,
  .top-nav-utilities > li > button {
    white-space: nowrap;
  }

  .dropdown-trigger {
    color: inherit;
  }

  .top-nav .external-destination::after,
  .site-footer .external-destination::after {
    content: " (External)";
    font-size: 0.82em;
    color: currentColor;
  }

  .skip-to-main {
    z-index: 2000;
  }

  @media (max-width: 920px) and (min-width: 769px) {
    .top-nav-inner {
      align-items: flex-start;
    }

    .top-nav-actions {
      width: 100%;
      justify-content: flex-start;
      margin-left: 0;
    }
  }

  @media (max-width: 768px) {
    .top-nav-inner {
      max-width: calc(100vw - 2rem);
      padding-left: 0;
      padding-right: 0;
    }

    .top-nav-actions,
    .menu-toggle.global-nav-toggle {
      max-width: 100%;
    }
  }
}

/* === components.css === */
@layer components {
  .badge-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin: 1.1rem 0 0;
    padding: 0;
    list-style: none;
  }

  .site-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.38rem 0.72rem;
    border-radius: var(--radius-pill);
    background: color-mix(in srgb, var(--primary-main) 12%, var(--bg-surface));
    color: var(--text-main);
    border: 1px solid color-mix(in srgb, var(--primary-main) 24%, var(--border-subtle));
    font-family: var(--type-meta-family);
    font-size: var(--meta-sm);
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    line-height: 1.15;
    max-width: 100%;
    white-space: normal;
  }

  .page-hero .site-badge {
    background: var(--hero-chip-bg);
    color: var(--hero-on-dark);
    border-color: var(--hero-chip-border);
  }

  .card-grid,
  .card-container.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
    gap: clamp(1rem, 2vw, 1.5rem);
    align-items: stretch;
  }

  .site-card,
  .course-card,
  .resource-card,
  .checklist-card,
  .profile-card {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    min-height: 0;
    padding: var(--site-card-padding);
    border-radius: var(--site-card-radius);
    background: var(--gradient-card-surface);
    border: 1px solid var(--border-transparent);
    box-shadow: none;
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .site-card:hover,
  .course-card:hover,
  .resource-card:hover,
  .profile-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--site-shadow-soft);
  }

  .site-card h2,
  .site-card h3,
  .course-card h2,
  .course-card h3,
  .resource-card h2,
  .resource-card h3,
  .checklist-card h2,
  .checklist-card h3,
  .profile-card h2,
  .profile-card h3 {
    margin: 0;
    font-size: clamp(1.15rem, 2vw, 1.35rem);
  }

  .site-card p,
  .course-card p,
  .resource-card p,
  .checklist-card p,
  .profile-card p {
    margin: 0;
    color: var(--text-muted);
  }

  .site-card .button,
  .course-card .button,
  .resource-card .button,
  .profile-card .button {
    margin-top: auto;
    align-self: flex-start;
  }

  .decision-card {
    border-top: 3px solid color-mix(in srgb, var(--primary-main) 72%, var(--emerald-main));
  }

  .checklist-card {
    background: linear-gradient(180deg, var(--surface-transparent), var(--surface-transparent)), var(--bg-surface);
  }

  .checklist-card ol,
  .checklist-card ul {
    display: grid;
    gap: 0.7rem;
    margin: 0;
    padding-left: 1.25rem;
  }

  .site-note {
    padding: clamp(1rem, 2vw, 1.4rem);
    border-radius: var(--site-card-radius);
    background: var(--callout-info-surface);
    border: 1px solid var(--callout-info-border);
  }

  .site-note > *:last-child {
    margin-bottom: 0;
  }

  .category-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin: 1.25rem 0 0;
  }

  .category-nav a {
    display: inline-flex;
    align-items: center;
    padding: 0.48rem 0.75rem;
    border-radius: var(--radius-pill);
    background: var(--primary-surface);
    color: var(--text-main);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.9rem;
  }

  .category-nav a:hover,
  .category-nav a:focus-visible {
    background: color-mix(in srgb, var(--primary-main) 18%, var(--bg-surface));
  }

  .site-footer {
    background: var(--gradient-footer-surface);
    color: var(--text-muted);
  }

  .site-footer nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.8rem 1rem;
    font-size: 0.95rem;
  }

  .site-footer a {
    color: var(--text-muted);
  }
}

/* === pages-home.css === */
@layer pages {
  .home-decision-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .home-section-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .home-connect {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
    gap: clamp(1rem, 3vw, 2rem);
    align-items: stretch;
  }

  @media (max-width: 900px) {
    .home-decision-grid,
    .home-section-grid,
    .home-connect {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  }

  @media (max-width: 640px) {
    .home-decision-grid,
    .home-section-grid,
    .home-connect {
      grid-template-columns: 1fr;
    }
  }
}

/* === pages-courses.css === */
@layer pages {
  .course-home-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .course-dashboard-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  }

  .quick-start-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  }

  .current-need-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .lab-course-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .course-card__meta {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .course-card ul,
  .resource-card ul {
    margin: 0;
    padding-left: 1.2rem;
    color: var(--text-muted);
  }

  @media (max-width: 980px) {
    .course-home-grid,
    .lab-course-grid,
    .current-need-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }
  }

  @media (max-width: 640px) {
    .course-home-grid,
    .lab-course-grid,
    .current-need-grid {
      grid-template-columns: 1fr;
    }
  }
}

/* === pages-tools.css === */
@layer pages {
  .resource-category {
    scroll-margin-top: 7rem;
  }

  .resource-category + .resource-category {
    margin-top: var(--site-section-gap);
  }

  .resource-card__type {
    color: var(--secondary);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .featured-resource-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  }
}

/* === pages-cv.css === */
@layer pages {
  .cv-hero-actions {
    margin-top: 1.25rem;
  }

  .quick-profile-grid,
  .audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr));
    gap: clamp(1rem, 2vw, 1.4rem);
    margin-bottom: var(--site-section-gap);
  }

  .profile-card dl {
    display: grid;
    gap: 0.75rem;
    margin: 0;
  }

  .profile-card dt {
    font-weight: 800;
    color: var(--text-main);
  }

  .profile-card dd {
    margin: 0;
    color: var(--text-muted);
  }
}

/* === pages-mathclub.css === */
@layer pages {
  .mathclub-page {
    --mathclub-accent: #7c2d12;
    --mathclub-accent-strong: #9a3412;
    --mathclub-accent-soft: #fff7ed;
    --mathclub-accent-wash: color-mix(in srgb, var(--mathclub-accent) 10%, var(--bg-surface));
  }

  .mathclub-page .top-nav-links > li > a[href="/club/"] {
    color: var(--text-main);
  }

  .mathclub-subnav-wrap {
    border-bottom: 1px solid var(--border-subtle);
    background: color-mix(in srgb, var(--bg-surface) 92%, var(--mathclub-accent-soft));
  }

  .mathclub-subnav-inner {
    width: min(var(--site-max-width), calc(100% - 2rem));
    margin-inline: auto;
    padding: 0.65rem 0;
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 0;
  }

  .mathclub-back-link {
    flex: 0 0 auto;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 700;
    text-decoration: none;
  }

  .mathclub-subnav {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .mathclub-subnav a {
    flex: 0 0 auto;
    padding: 0.42rem 0.7rem;
    border-radius: var(--radius-pill);
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 800;
  }

  .mathclub-subnav a:hover,
  .mathclub-subnav a:focus-visible,
  .mathclub-subnav a[aria-current="page"] {
    background: color-mix(in srgb, var(--mathclub-accent) 14%, var(--bg-surface));
    color: var(--text-main);
  }

  .mathclub-hero {
    background:
      radial-gradient(circle at 82% 12%, color-mix(in srgb, var(--mathclub-accent) 24%, transparent), transparent 32rem),
      linear-gradient(135deg, color-mix(in srgb, var(--bg-surface) 92%, var(--mathclub-accent-soft)), var(--bg-main));
    color: var(--text-main);
  }

  .mathclub-hero::before {
    background: linear-gradient(135deg, color-mix(in srgb, var(--mathclub-accent) 18%, transparent), transparent);
  }

  .mathclub-hero h1,
  .mathclub-hero .page-hero__lede {
    color: var(--text-main);
  }

  .mathclub-hero .page-hero__eyebrow,
  .mathclub-hero .mathclub-meta-row {
    color: var(--text-muted);
  }

  .mathclub-hero .button-secondary {
    background: color-mix(in srgb, var(--bg-surface) 82%, var(--mathclub-accent-soft));
    color: var(--text-main);
    border-color: color-mix(in srgb, var(--mathclub-accent) 22%, var(--border-subtle));
  }

  .mathclub-hero-brand {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: clamp(1rem, 3vw, 1.5rem);
  }

  .mathclub-logo {
    width: clamp(4.5rem, 10vw, 7rem);
    height: clamp(4.5rem, 10vw, 7rem);
    object-fit: contain;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid var(--border-subtle);
    padding: 0.45rem;
  }

  .mathclub-meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem 1rem;
    margin-top: 1rem;
    color: var(--hero-on-dark-muted, var(--text-muted));
    font-size: 0.95rem;
    font-weight: 700;
  }

  .mathclub-fact-grid,
  .mathclub-audience-grid,
  .mathclub-service-grid,
  .mathclub-comparison-grid {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  }

  .mathclub-fact {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
  }

  .mathclub-fact strong {
    color: var(--text-main);
    font-size: clamp(1.15rem, 2vw, 1.35rem);
  }

  .mathclub-event-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: clamp(1rem, 2vw, 1.5rem);
  }

  .mathclub-event-card {
    display: grid;
    gap: 0.65rem;
    padding: var(--site-card-padding);
    border-radius: var(--site-card-radius);
    background: var(--gradient-card-surface);
    border: 1px solid var(--border-transparent);
    min-width: 0;
  }

  .mathclub-event-card--featured {
    border-color: color-mix(in srgb, var(--mathclub-accent) 42%, var(--border-subtle));
    background:
      linear-gradient(180deg, color-mix(in srgb, var(--mathclub-accent-soft) 60%, transparent), transparent),
      var(--gradient-card-surface);
  }

  .mathclub-event-date,
  .mathclub-event-series,
  .mathclub-card-label {
    color: var(--mathclub-accent-strong);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .mathclub-event-card h3,
  .mathclub-event-card p {
    margin: 0;
  }

  .mathclub-event-meta {
    color: var(--text-muted);
    font-weight: 700;
  }

  .mathclub-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-top: 1rem;
  }

  .mathclub-chip-row a,
  .mathclub-chip-row span {
    display: inline-flex;
    align-items: center;
    padding: 0.42rem 0.7rem;
    border-radius: var(--radius-pill);
    background: var(--mathclub-accent-wash);
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 800;
  }

  .mathclub-timeline {
    display: grid;
    gap: 1rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .mathclub-timeline li {
    position: relative;
    padding: 1rem 1rem 1rem 1.25rem;
    border-left: 4px solid var(--mathclub-accent);
    border-radius: 0 var(--site-card-radius) var(--site-card-radius) 0;
    background: var(--gradient-card-surface);
    border-top: 1px solid var(--border-transparent);
    border-right: 1px solid var(--border-transparent);
    border-bottom: 1px solid var(--border-transparent);
  }

  .mathclub-details {
    display: grid;
    gap: 0.85rem;
  }

  .mathclub-details details {
    padding: 1rem;
    border-radius: var(--site-card-radius);
    background: var(--gradient-card-surface);
    border: 1px solid var(--border-transparent);
  }

  .mathclub-details summary {
    cursor: pointer;
    font-weight: 800;
    color: var(--text-main);
  }

  .mathclub-checklist {
    display: grid;
    gap: 0.7rem;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .mathclub-checklist li {
    padding-left: 1.75rem;
    position: relative;
    color: var(--text-muted);
  }

  .mathclub-checklist li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.18rem;
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--mathclub-accent);
    border-radius: 0.25rem;
    background: var(--bg-surface);
  }

  .mathclub-request-panel {
    display: grid;
    gap: 0.85rem;
  }

  .mathclub-request-panel ul {
    margin: 0;
    padding-left: 1.2rem;
    color: var(--text-muted);
  }

  @media (max-width: 760px) {
    .mathclub-subnav-inner {
      display: block;
    }

    .mathclub-subnav {
      margin-top: 0.55rem;
    }

    .mathclub-hero-brand {
      grid-template-columns: 1fr;
    }
  }
}

/* === pages-review.css === */
@layer pages {
  body.review-page .top-nav,
  .math-review-page .top-nav {
    font-family: var(--type-body-family);
  }
}

/* === utilities.css === */
@layer utilities {
  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .text-link-list {
    display: grid;
    gap: 0.45rem;
    margin: 0;
    padding-left: 1.2rem;
  }

  .muted {
    color: var(--text-muted);
  }
}

/* === print.css === */
@layer print {
  @media print {
    .top-nav,
    .page-context-bar,
    .category-nav,
    .page-actions,
    .site-footer {
      display: none !important;
    }

    .page-hero {
      background: none;
      color: #000;
      padding: 0 0 1rem;
    }

    .page-hero::before {
      display: none;
    }

    .page-hero h1,
    .page-hero__lede,
    .page-hero__eyebrow {
      color: #000;
    }
  }
}