/* ==========================================================================
   Hack My Study — "The Study Desk" Design System
   Self-hosted. No CDNs. No external dependencies.
   ========================================================================== */

/* ---------- Fonts ---------- */
@font-face {
  font-family: 'Inter';
  src: url('/assets/fonts/inter-var.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Space Grotesk';
  src: url('/assets/fonts/space-grotesk-var.woff2') format('woff2');
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}

/* ---------- Custom Properties ---------- */
:root {
  /* Palette — warm study desk tones */
  --color-ink:        #1a1a2e;
  --color-ink-light:  #3a3a52;
  --color-paper:      #faf8f4;
  --color-paper-warm: #f5f0e8;
  --color-paper-cool: #eef1f5;
  --color-cream:      #f0ead6;
  --color-highlight:  #ffe066;
  --color-highlight-soft: rgba(255, 224, 102, 0.35);
  --color-accent:     #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-success:    #059669;
  --color-muted:      #6b7280;
  --color-border:     #d4d0c8;
  --color-border-light: #e8e4dc;
  --color-shadow:     rgba(26,26,46,0.08);

  /* Type scale */
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-heading: 'Space Grotesk', 'Inter', -apple-system, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width:         72rem;
  --max-width-prose:   42rem;
  --max-width-wide:    58rem;
  --border-radius:     0.5rem;
  --border-radius-lg:  1rem;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-ink);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--color-accent-hover); }
a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; border-radius: 2px; }

/* ---------- Skip Link ---------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--border-radius);
  z-index: 1000;
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: var(--space-4); }

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-border-light);
  backdrop-filter: blur(8px);
  background: rgba(250,248,244,0.92);
}
.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-ink);
  flex-shrink: 0;
}
.site-logo__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background: var(--color-ink);
  color: var(--color-paper);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-xs);
  border-radius: 6px;
  letter-spacing: 0.05em;
}
.site-logo__text {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-lg);
}

/* Nav */
.main-nav { flex: 1; }
.main-nav__list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  justify-content: center;
}
.main-nav__item a {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-light);
  text-decoration: none;
  border-radius: var(--border-radius);
  transition: background 0.15s, color 0.15s;
}
.main-nav__item a:hover,
.main-nav__item a[aria-current="page"] {
  background: var(--color-paper-warm);
  color: var(--color-ink);
}

/* Nav toggle (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}
.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform 0.2s;
}

/* Search trigger */
.search-trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-paper-warm);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  color: var(--color-muted);
  font-size: var(--text-sm);
  transition: border-color 0.15s;
}
.search-trigger:hover { border-color: var(--color-border); }
.search-trigger kbd {
  display: inline-block;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  padding: 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.5;
}

/* Mobile breakpoint */
@media (max-width: 52rem) {
  .nav-toggle { display: flex; }
  .main-nav__list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-paper);
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--space-4) var(--space-6);
    box-shadow: 0 4px 12px var(--color-shadow);
  }
  .main-nav__list.is-open { display: flex; }
  .site-logo__text { display: none; }
  .search-trigger kbd { display: none; }
}

/* ==========================================================================
   SEARCH OVERLAY
   ========================================================================== */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(26,26,46,0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.search-overlay[aria-hidden="false"] {
  opacity: 1;
  pointer-events: auto;
}
.search-overlay__inner {
  background: var(--color-paper);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 20px 60px rgba(26,26,46,0.2);
  width: 100%;
  max-width: 36rem;
  padding: var(--space-6);
  position: relative;
}
.search-overlay__close {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: none;
  border: none;
  font-size: var(--text-2xl);
  cursor: pointer;
  color: var(--color-muted);
  line-height: 1;
  padding: var(--space-1);
}

/* ==========================================================================
   PAPER TEXTURE SECTIONS
   ========================================================================== */
.section-paper {
  background: var(--color-paper-warm);
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 1.6rem,
      rgba(180,170,155,0.08) 1.6rem,
      rgba(180,170,155,0.08) 1.65rem
    );
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.section-cool {
  background: var(--color-paper-cool);
}

/* ==========================================================================
   HIGHLIGHTER MOTIF
   ========================================================================== */
.highlight-mark,
mark {
  background: linear-gradient(180deg, transparent 55%, var(--color-highlight-soft) 55%);
  padding: 0 0.15em;
}

/* ==========================================================================
   INDEX CARDS (for tips, checklists, drills)
   ========================================================================== */
.index-card {
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius);
  padding: var(--space-5) var(--space-6);
  box-shadow: 0 1px 3px var(--color-shadow), 0 4px 12px rgba(26,26,46,0.03);
  transition: box-shadow 0.2s, transform 0.2s;
}
.index-card:hover {
  box-shadow: 0 2px 8px var(--color-shadow), 0 8px 24px rgba(26,26,46,0.06);
  transform: translateY(-1px);
}
@media (prefers-reduced-motion: reduce) {
  .index-card:hover { transform: none; }
}

.index-card a {
  text-decoration: none;
  color: var(--color-ink);
  display: block;
}
.index-card a:hover { color: var(--color-accent); }

.index-card__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-1);
}
.index-card__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--space-2);
}
.index-card__desc {
  font-size: var(--text-sm);
  color: var(--color-ink-light);
  line-height: 1.6;
}
.index-card__meta {
  font-size: var(--text-xs);
  color: var(--color-muted);
  margin-top: var(--space-3);
  display: flex;
  gap: var(--space-3);
}

/* ==========================================================================
   CARD GRIDS
   ========================================================================== */
.card-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
  list-style: none;
}
.card-grid--compact {
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
}
.card-grid--2col {
  grid-template-columns: repeat(auto-fill, minmax(22rem, 1fr));
}

/* ==========================================================================
   CALLOUTS (margin-note style)
   ========================================================================== */
.callout {
  border-left: 3px solid var(--color-accent);
  background: var(--color-paper-cool);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  padding: var(--space-4) var(--space-5);
  margin: var(--space-6) 0;
  font-size: var(--text-sm);
  position: relative;
}
.callout--tip { border-left-color: var(--color-success); }
.callout--warning { border-left-color: #f59e0b; background: #fffbeb; }
.callout--important { border-left-color: #ef4444; background: #fef2f2; }

.callout::before {
  content: '';
  position: absolute;
  top: var(--space-3);
  left: calc(-3px - 0.6rem);
  width: 1.2rem;
  height: 1.2rem;
  background: var(--color-paper);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
}
.callout--tip::before { border-color: var(--color-success); }

/* Margin notes */
.margin-note {
  display: block;
  background: var(--color-cream);
  border-radius: var(--border-radius);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-ink-light);
  margin: var(--space-4) 0;
  font-style: italic;
  border-left: 2px solid var(--color-highlight);
}

/* ==========================================================================
   PROSE (article body)
   ========================================================================== */
.prose {
  max-width: var(--max-width-prose);
  font-size: var(--text-base);
  line-height: 1.75;
}
.prose > * + * { margin-top: var(--space-5); }
.prose h2 {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.25;
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
  color: var(--color-ink);
}
.prose h3 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: 1.3;
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}
.prose h4 {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}
.prose p { }
.prose ul, .prose ol {
  padding-left: var(--space-6);
}
.prose li + li { margin-top: var(--space-2); }
.prose blockquote {
  border-left: 3px solid var(--color-border);
  padding-left: var(--space-5);
  color: var(--color-ink-light);
  font-style: italic;
}
.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-paper-warm);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}
.prose pre {
  background: var(--color-ink);
  color: var(--color-paper);
  padding: var(--space-5);
  border-radius: var(--border-radius);
  overflow-x: auto;
}
.prose pre code { background: none; padding: 0; color: inherit; }
.prose hr {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin: var(--space-10) 0;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.prose th, .prose td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
  text-align: left;
}
.prose th { font-weight: 600; background: var(--color-paper-warm); }

/* ==========================================================================
   PAGE LAYOUTS
   ========================================================================== */
.page-layout,
.guide-layout,
.tool-layout,
.note-layout {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: var(--space-10) var(--space-6) var(--space-16);
}

/* Guide header */
.guide-header { margin-bottom: var(--space-8); }
.guide-header h1 {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: 1.15;
  max-width: 38ch;
}
@media (max-width: 40rem) {
  .guide-header h1 { font-size: var(--text-3xl); }
}
.guide-header__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}
.guide-header__pillar {
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-1) var(--space-3);
  border-radius: 100px;
  font-weight: 600;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.guide-header__subtitle {
  font-size: var(--text-xl);
  color: var(--color-ink-light);
  margin-top: var(--space-3);
  max-width: 52ch;
}

/* Page header */
.page-header { margin-bottom: var(--space-8); }
.page-header h1 {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: 1.15;
}
@media (max-width: 40rem) {
  .page-header h1 { font-size: var(--text-3xl); }
}
.page-header__subtitle {
  font-size: var(--text-xl);
  color: var(--color-ink-light);
  margin-top: var(--space-3);
}

/* Note header */
.note-header { margin-bottom: var(--space-8); }
.note-header h1 {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.2;
}

/* Note CTA */
.note-cta {
  margin-top: var(--space-12);
  padding: var(--space-6);
  background: var(--color-paper-warm);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border-light);
}
.note-cta h2 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  margin-bottom: var(--space-3);
}
.note-cta ul { padding-left: var(--space-5); }
.note-cta li + li { margin-top: var(--space-2); }

/* Related guides */
.related-guides {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-light);
}
.related-guides h2 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  margin-bottom: var(--space-6);
}

/* Hero images */
.hero-img {
  margin-bottom: var(--space-8);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  background: var(--color-paper-warm);
}
.hero-img img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.support-img {
  margin: var(--space-8) 0;
  border-radius: var(--border-radius);
  overflow: hidden;
  background: var(--color-paper-warm);
}
.support-img img { width: 100%; height: auto; }

/* ==========================================================================
   HOME PAGE
   ========================================================================== */
.home-hero {
  text-align: center;
  padding: var(--space-16) var(--space-6) var(--space-12);
  max-width: var(--max-width);
  margin: 0 auto;
}
.home-hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-5xl);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-4);
}
@media (max-width: 40rem) {
  .home-hero__title { font-size: var(--text-3xl); }
}
.home-hero__sub {
  font-size: var(--text-xl);
  color: var(--color-ink-light);
  max-width: 38ch;
  margin: 0 auto var(--space-8);
  line-height: 1.5;
}
.home-hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-ink);
  color: var(--color-paper);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-lg);
  transition: background 0.15s;
}
.home-hero__cta:hover { background: var(--color-ink-light); color: var(--color-paper); }

/* Problem grid */
.problem-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6);
}
.problem-grid__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-8);
}

/* Desk Drawer (widgets) */
.desk-drawer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6);
}
.desk-drawer__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-2);
}
.desk-drawer__sub {
  text-align: center;
  color: var(--color-muted);
  margin-bottom: var(--space-8);
}
.desk-drawer__grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
}

/* Widget cards */
.widget-card {
  background: #fff;
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  padding: var(--space-6);
  text-align: center;
}
.widget-card__title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}
.widget-card__timer {
  font-family: var(--font-heading);
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--color-accent);
  margin: var(--space-4) 0;
  font-variant-numeric: tabular-nums;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn--primary:hover { background: var(--color-accent-hover); color: #fff; }
.btn--secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-border);
}
.btn--secondary:hover { border-color: var(--color-ink); }

/* Recently updated */
.recent-updates {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6);
}
.recent-updates__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-8);
}

/* ==========================================================================
   LIBRARY PAGE
   ========================================================================== */
.library-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}
.library-filters__btn {
  background: var(--color-paper-warm);
  border: 1px solid var(--color-border-light);
  border-radius: 100px;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  color: var(--color-ink-light);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.library-filters__btn:hover,
.library-filters__btn.is-active {
  background: var(--color-ink);
  color: var(--color-paper);
  border-color: var(--color-ink);
}

/* ==========================================================================
   TOOL PAGES
   ========================================================================== */
.tool-header {
  text-align: center;
  margin-bottom: var(--space-10);
}
.tool-header h1 {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: 700;
}
.tool-header__subtitle {
  font-size: var(--text-lg);
  color: var(--color-ink-light);
  margin-top: var(--space-3);
}

.tool-widget {
  max-width: var(--max-width-prose);
  margin: 0 auto;
}

/* Pomodoro specific */
.pomodoro-display {
  text-align: center;
  padding: var(--space-8) 0;
}
.pomodoro-display__time {
  font-family: var(--font-heading);
  font-size: 6rem;
  font-weight: 700;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.pomodoro-display__label {
  font-size: var(--text-lg);
  color: var(--color-muted);
  margin-top: var(--space-2);
}
.pomodoro-controls {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

/* Form elements for tools */
.tool-form { margin: var(--space-6) 0; }
.tool-form label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
}
.tool-form input[type="text"],
.tool-form input[type="number"],
.tool-form textarea,
.tool-form select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-family: var(--font-body);
  font-size: var(--text-base);
  background: #fff;
  color: var(--color-ink);
  transition: border-color 0.15s;
}
.tool-form input:focus,
.tool-form textarea:focus,
.tool-form select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.tool-form .field-group {
  margin-bottom: var(--space-5);
}

/* Results display */
.tool-result {
  background: var(--color-paper-warm);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  padding: var(--space-6);
  margin-top: var(--space-6);
}
.tool-result__title {
  font-family: var(--font-heading);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

/* Checklist style */
.checklist { list-style: none; padding: 0; }
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-light);
}
.checklist li:last-child { border-bottom: none; }
.checklist input[type="checkbox"] {
  flex-shrink: 0;
  margin-top: 0.25em;
  width: 1.1em;
  height: 1.1em;
  accent-color: var(--color-accent);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  background: var(--color-ink);
  color: rgba(255,255,255,0.7);
  padding: var(--space-12) var(--space-6);
  margin-top: var(--space-16);
}
.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  gap: var(--space-8);
  grid-template-columns: 1fr auto;
  align-items: start;
}
@media (max-width: 40rem) {
  .site-footer__inner { grid-template-columns: 1fr; }
}
.site-footer__brand .site-logo__mark {
  background: rgba(255,255,255,0.15);
  color: #fff;
  margin-bottom: var(--space-3);
}
.site-footer__brand p {
  font-size: var(--text-sm);
  line-height: 1.6;
  max-width: 30ch;
}
.site-footer__nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
}
.site-footer__nav a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color 0.15s;
}
.site-footer__nav a:hover { color: #fff; }
.site-footer__copy {
  grid-column: 1 / -1;
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* ==========================================================================
   404 PAGE
   ========================================================================== */
.error-page {
  text-align: center;
  padding: var(--space-20) var(--space-6);
}
.error-page__code {
  font-family: var(--font-heading);
  font-size: 8rem;
  font-weight: 700;
  color: var(--color-border);
  line-height: 1;
}
.error-page__title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  margin-top: var(--space-4);
}
.error-page__text {
  color: var(--color-ink-light);
  margin-top: var(--space-4);
  max-width: 40ch;
  margin-left: auto;
  margin-right: auto;
}
.error-page__links {
  margin-top: var(--space-8);
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* ==========================================================================
   PAGEFIND OVERRIDES
   ========================================================================== */
:root {
  --pagefind-ui-scale: 0.9;
  --pagefind-ui-primary: var(--color-accent);
  --pagefind-ui-text: var(--color-ink);
  --pagefind-ui-background: var(--color-paper);
  --pagefind-ui-border: var(--color-border);
  --pagefind-ui-border-width: 1px;
  --pagefind-ui-border-radius: var(--border-radius);
  --pagefind-ui-font: var(--font-body);
}

/* ==========================================================================
   UTILITY CLASSES
   ========================================================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }