/* ============================================================
   dbt + Geospatial — main stylesheet
   Light, professional palette inspired by maps + analytics.
   ============================================================ */

:root {
  /* Brand palette */
  --color-teal-900: #073e4d;
  --color-teal-700: #0f5b6e;
  --color-teal-500: #1e8a9e;
  --color-teal-200: #cae5ea;
  --color-teal-100: #e3f1f4;

  --color-orange-700: #c8501f;
  --color-orange-500: #ef5f33;
  --color-orange-400: #f06a3a;
  --color-orange-200: #ffd9c8;
  --color-orange-100: #fff0e8;

  --color-sage-700: #41715a;
  --color-sage-500: #5a8c6c;
  --color-sage-300: #9ec5a9;
  --color-sage-100: #e3efe6;

  --color-amber-500: #d99e2b;
  --color-amber-100: #fbf1d6;

  /* Neutrals */
  --color-ink-900: #1f2933;
  --color-ink-700: #3d4a59;
  --color-ink-500: #5a6a7d;
  --color-ink-300: #94a1b2;
  --color-line: #e6e1d5;
  --color-paper: #fbfaf7;
  --color-paper-2: #f4f1ea;
  --color-paper-3: #ede8dc;
  --color-white: #ffffff;

  /* Semantic tokens */
  --bg: var(--color-paper);
  --surface: var(--color-white);
  --surface-2: var(--color-paper-2);
  --text: var(--color-ink-900);
  --text-soft: var(--color-ink-700);
  --text-muted: var(--color-ink-500);
  --link: var(--color-teal-700);
  --link-hover: var(--color-orange-500);
  --border: var(--color-line);
  --accent: var(--color-orange-500);
  --accent-2: var(--color-teal-700);
  --accent-3: var(--color-sage-500);

  /* Type */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-1: 0 1px 2px rgba(15, 91, 110, 0.06), 0 1px 1px rgba(15, 91, 110, 0.04);
  --shadow-2: 0 6px 18px -10px rgba(15, 91, 110, 0.25), 0 2px 6px -2px rgba(15, 91, 110, 0.10);
  --shadow-3: 0 22px 50px -30px rgba(15, 91, 110, 0.35), 0 8px 20px -10px rgba(15, 91, 110, 0.12);

  /* Layout */
  --container: min(1380px, calc(100vw - 2 * var(--gutter)));
  --container-wide: min(1480px, calc(100vw - 2 * var(--gutter)));
  --gutter: clamp(1rem, 3vw, 2.5rem);
  --header-height: 72px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --t-fast: 120ms;
  --t-med: 220ms;
}

/* ============================================================
   Reset
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(15px, 0.5vw + 14px, 17px);
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-decoration: none; transition: color var(--t-fast) var(--ease); }
a:hover, a:focus-visible { color: var(--link-hover); }
button { font-family: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--color-teal-500); outline-offset: 3px; border-radius: 4px; }

/* Skip link */
.skip-link {
  position: absolute; left: -9999px; top: 0; padding: var(--space-3) var(--space-4);
  background: var(--accent-2); color: var(--color-white); z-index: 100; border-radius: 0 0 var(--radius-md) 0;
}
.skip-link:focus { left: 0; color: var(--color-white); }

/* Containers */
.container { width: var(--container); max-width: 100%; margin-inline: auto; padding-inline: 0; }
.container--wide { width: var(--container-wide); }

/* Scroll offset for sticky header anchors */
h1[id], h2[id], h3[id], h4[id], h5[id], h6[id] {
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 250, 247, 0.85);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-3);
}
.brand {
  display: inline-flex; align-items: center; gap: var(--space-3);
  text-decoration: none; color: var(--text);
}
.brand .logo-mark { width: 40px; height: 40px; transition: transform var(--t-med) var(--ease); }
.brand:hover .logo-mark { transform: rotate(-6deg) scale(1.06); }
.brand__text { font-weight: 700; letter-spacing: -0.01em; font-size: 1.05rem; }
.brand__primary { color: var(--color-teal-700); }
.brand__plus { color: var(--color-orange-500); margin-inline: 0.18em; }
.brand__secondary { color: var(--color-sage-700); }

/* Nav */
.primary-nav__list {
  list-style: none; margin: 0; padding: 0;
  display: flex; align-items: center; gap: var(--space-2);
}
.primary-nav__link {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: 0.55rem 0.9rem; border-radius: var(--radius-pill);
  font-weight: 500; font-size: 0.93rem; color: var(--text-soft);
  border: 1px solid transparent;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.primary-nav__link:hover { background: var(--color-paper-2); color: var(--text); transform: translateY(-1px); }
.primary-nav__link.is-current { background: var(--color-teal-100); color: var(--color-teal-900); border-color: var(--color-teal-200); }
.primary-nav__link--orange.is-current { background: var(--color-orange-100); color: var(--color-orange-700); border-color: var(--color-orange-200); }
.primary-nav__link--sage.is-current { background: var(--color-sage-100); color: var(--color-sage-700); border-color: #cfe1d4; }
.primary-nav__icon { width: 18px; height: 18px; display: inline-flex; }
.primary-nav__icon svg { width: 100%; height: 100%; }

.nav-toggle { display: none; background: transparent; border: 1px solid var(--border); border-radius: var(--radius-md); padding: 0.45rem; color: var(--text); }
.nav-toggle__icon { display: inline-flex; width: 22px; height: 22px; }
.nav-toggle__icon--close { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon--open { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon--close { display: inline-flex; }

@media (max-width: 880px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: absolute; left: 0; right: 0; top: 100%;
    background: var(--surface); border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-2);
    max-height: 0; overflow: hidden;
    transition: max-height var(--t-med) var(--ease);
  }
  .primary-nav.is-open { max-height: 60vh; }
  .primary-nav__list { flex-direction: column; align-items: stretch; padding: var(--space-3) var(--gutter); gap: var(--space-1); }
  .primary-nav__link { justify-content: flex-start; padding: 0.75rem 1rem; border-radius: var(--radius-md); }
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  padding-block: clamp(3rem, 6vw, 6rem) clamp(2.5rem, 5vw, 5rem);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(239, 95, 51, 0.10), transparent 60%),
    radial-gradient(900px 500px at 0% 20%, rgba(30, 138, 158, 0.10), transparent 65%),
    linear-gradient(180deg, var(--color-paper) 0%, var(--color-paper-2) 100%);
  overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(15, 91, 110, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 91, 110, 0.045) 1px, transparent 1px);
  background-size: 48px 48px, 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
}
.hero__inner { position: relative; z-index: 1; text-align: center; }
.hero__logo { display: flex; justify-content: center; margin-bottom: var(--space-5); }
.hero__logo .logo-mark {
  width: clamp(120px, 14vw, 180px);
  height: clamp(120px, 14vw, 180px);
  filter: drop-shadow(0 18px 40px rgba(15, 91, 110, 0.25));
  animation: float 7s ease-in-out infinite;
}
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

.hero__title {
  margin: 0 auto var(--space-5);
  font-size: clamp(2rem, 3.6vw + 0.5rem, 3.75rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  display: flex; flex-direction: column; gap: 0.5rem;
}
.hero__title-grad {
  background: linear-gradient(90deg, var(--color-teal-700) 0%, var(--color-orange-500) 60%, var(--color-sage-500) 110%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.hero__title-sub {
  font-size: 0.45em; font-weight: 600; color: var(--text-soft); letter-spacing: 0;
}
.hero__lede {
  max-width: 64ch; margin: 0 auto var(--space-4);
  font-size: clamp(1rem, 0.4vw + 0.95rem, 1.18rem);
  color: var(--text-soft);
}
.hero__lede strong { color: var(--color-teal-900); }

.hero__ctas {
  display: grid; gap: var(--space-3);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: var(--space-6);
  text-align: left;
}

/* CTA buttons */
.cta {
  display: inline-flex; align-items: center; gap: var(--space-3);
  padding: 1rem 1.15rem;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  transition: transform var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease), border-color var(--t-fast) var(--ease);
  text-decoration: none;
}
.cta:hover { transform: translateY(-3px); box-shadow: var(--shadow-3); color: var(--text); }
.cta__icon {
  flex: 0 0 auto;
  width: 44px; height: 44px; border-radius: 12px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-white);
}
.cta__icon svg { width: 22px; height: 22px; }
.cta--teal .cta__icon { background: linear-gradient(135deg, var(--color-teal-500), var(--color-teal-700)); }
.cta--orange .cta__icon { background: linear-gradient(135deg, var(--color-orange-400), var(--color-orange-700)); }
.cta--sage .cta__icon { background: linear-gradient(135deg, var(--color-sage-300), var(--color-sage-500)); color: var(--color-teal-900); }
.cta--teal:hover { border-color: var(--color-teal-200); }
.cta--orange:hover { border-color: var(--color-orange-200); }
.cta--sage:hover { border-color: #cfe1d4; }

.cta__body { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.cta__label { font-weight: 700; font-size: 1rem; }
.cta__sub { font-size: 0.86rem; color: var(--text-muted); }
.cta__arrow { color: var(--text-muted); transition: transform var(--t-med) var(--ease), color var(--t-fast) var(--ease); }
.cta__arrow svg { width: 20px; height: 20px; }
.cta:hover .cta__arrow { transform: translateX(4px); color: var(--accent); }

.cta--ghost {
  background: transparent; border: 1px dashed var(--color-teal-500); color: var(--color-teal-700);
  padding: 0.85rem 1.25rem; gap: var(--space-2); font-weight: 600;
}
.cta--ghost:hover { background: var(--color-teal-100); }

/* ============================================================
   Overview / cards
   ============================================================ */
.overview { padding-block: clamp(3rem, 6vw, 5rem); }
.overview__title {
  font-size: clamp(1.5rem, 1.5vw + 1rem, 2.2rem);
  margin: 0 0 var(--space-6);
  text-align: center;
  background: linear-gradient(90deg, var(--color-teal-700), var(--color-orange-500));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.overview__grid {
  display: grid; gap: var(--space-5);
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.overview__card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-1);
  transition: transform var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease), border-color var(--t-fast) var(--ease);
  display: flex; flex-direction: column; gap: var(--space-3);
}
.overview__card:hover { transform: translateY(-4px); box-shadow: var(--shadow-3); }
.overview__card h3 { margin: 0; font-size: 1.2rem; line-height: 1.25; }
.overview__card h3 a { color: var(--text); }
.overview__card h3 a:hover { color: var(--accent); }
.overview__card p { margin: 0; color: var(--text-soft); }
.overview__icon {
  width: 48px; height: 48px; border-radius: 14px;
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--color-white);
}
.overview__icon svg { width: 24px; height: 24px; }
.overview__icon--teal { background: linear-gradient(135deg, var(--color-teal-500), var(--color-teal-700)); }
.overview__icon--orange { background: linear-gradient(135deg, var(--color-orange-400), var(--color-orange-700)); }
.overview__icon--sage { background: linear-gradient(135deg, var(--color-sage-300), var(--color-sage-500)); color: var(--color-teal-900); }
.overview__card--teal { border-top: 3px solid var(--color-teal-500); }
.overview__card--orange { border-top: 3px solid var(--color-orange-500); }
.overview__card--sage { border-top: 3px solid var(--color-sage-500); }
.overview__links { list-style: none; margin: var(--space-2) 0 0; padding: 0; display: grid; gap: 0.35rem; }
.overview__links a {
  display: block; padding: 0.35rem 0;
  border-bottom: 1px dashed transparent;
  font-size: 0.93rem;
}
.overview__links a:hover { border-bottom-color: currentColor; }

/* Callout */
.callout {
  background: linear-gradient(180deg, var(--color-paper-2), var(--color-paper-3));
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding-block: var(--space-7);
}
.callout__inner {
  display: flex; gap: var(--space-5);
  align-items: center; justify-content: space-between; flex-wrap: wrap;
}
.callout__body { max-width: 60ch; }
.callout__body h2 {
  margin: 0 0 var(--space-2);
  font-size: clamp(1.25rem, 1vw + 1rem, 1.7rem);
  color: var(--color-teal-900);
}
.callout__body p { margin: 0; color: var(--text-soft); }

/* ============================================================
   Document layout (prose)
   ============================================================ */
.doc {
  padding-block: clamp(2rem, 4vw, 4rem);
}
.doc__body { margin-top: var(--space-5); }

.prose {
  max-width: none;
  color: var(--text);
}
.prose > * + * { margin-top: 1.1em; }
.prose h1 {
  font-size: clamp(1.85rem, 2.5vw + 1rem, 2.85rem);
  line-height: 1.1; letter-spacing: -0.02em; font-weight: 800;
  margin-top: 0;
  background: linear-gradient(90deg, var(--color-teal-700), var(--color-orange-500) 75%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.prose h2 {
  font-size: clamp(1.35rem, 1.5vw + 0.9rem, 1.85rem);
  margin-top: 2.4em; padding-bottom: 0.35em;
  border-bottom: 2px solid var(--color-teal-200);
  color: var(--color-teal-900); letter-spacing: -0.01em;
  position: relative;
}
.prose h2::before {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 56px; height: 2px;
  background: var(--color-orange-500);
}
.prose h3 {
  font-size: clamp(1.15rem, 0.8vw + 0.9rem, 1.4rem);
  margin-top: 2em; color: var(--color-teal-900);
}
.prose h4 { color: var(--color-teal-900); }

.prose p { margin: 1.1em 0; color: var(--text); }
.prose strong { color: var(--color-teal-900); }
.prose em { color: var(--text-soft); }

.prose a {
  color: var(--link);
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.prose a:hover {
  color: var(--link-hover);
  border-bottom-color: currentColor;
}

.prose ul, .prose ol {
  padding-left: 1.4em; margin: 1em 0;
}
.prose li { margin: 0.4em 0; }
.prose blockquote {
  margin: 1.5em 0; padding: 1em 1.25em;
  background: var(--color-teal-100); border-left: 4px solid var(--color-teal-500);
  border-radius: var(--radius-sm);
  color: var(--color-teal-900); font-style: italic;
}
.prose hr {
  border: 0; height: 1px; background: var(--border); margin: 2.5em 0;
}

/* Inline code — blends with text, no border */
.inline-code,
.prose :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-teal-100);
  color: var(--color-teal-900);
  padding: 0.12em 0.4em;
  border-radius: 5px;
  border: 0;
}
.prose a .inline-code { color: inherit; background: transparent; }

/* Code blocks */
.code-block {
  margin: 1.5em 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}
.code-block__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.45rem 0.85rem;
  background: var(--color-paper-2);
  border-bottom: 1px solid var(--border);
  font-size: 0.78rem;
}
.code-block__lang {
  text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600;
  color: var(--color-teal-700);
}
.code-block__copy {
  background: var(--surface); border: 1px solid var(--border); color: var(--text-soft);
  padding: 0.2rem 0.65rem; border-radius: var(--radius-pill);
  font-size: 0.78rem; font-weight: 600;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.code-block__copy:hover { background: var(--color-teal-700); border-color: var(--color-teal-700); color: var(--color-white); }
.code-block__copy.is-copied { background: var(--color-sage-500); border-color: var(--color-sage-500); color: var(--color-white); }

.code-block pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  background: transparent;
}
.code-block pre code { background: transparent; padding: 0; }

/* Tables */
.table-wrap {
  overflow-x: auto; margin: 1.5em 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-1);
}
.prose table {
  width: 100%; border-collapse: collapse;
}
.prose th, .prose td {
  padding: 0.75rem 0.9rem; text-align: left; vertical-align: top;
  border-bottom: 1px solid var(--border);
}
.prose th {
  background: var(--color-teal-100); color: var(--color-teal-900);
  font-weight: 600; position: sticky; top: 0;
}
.prose tbody tr:nth-child(even) { background: var(--color-paper-2); }

/* Task list (checkboxes) */
.prose ul li.task-list-item {
  list-style: none;
  padding-left: 0;
  display: flex; align-items: flex-start; gap: 0.6em;
}
.prose ul.contains-task-list { padding-left: 0; }
.prose ul li.task-list-item::marker { content: ""; }
.prose ul li.task-list-item input.task-list-item-checkbox {
  appearance: none; -webkit-appearance: none;
  width: 1.05em; height: 1.05em; margin-top: 0.32em; flex: 0 0 auto;
  border: 1.5px solid var(--color-teal-500);
  border-radius: 4px; background: var(--surface);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
  position: relative;
}
.prose ul li.task-list-item input.task-list-item-checkbox:hover { border-color: var(--color-orange-500); }
.prose ul li.task-list-item input.task-list-item-checkbox:checked {
  background: var(--color-teal-700); border-color: var(--color-teal-700);
}
.prose ul li.task-list-item input.task-list-item-checkbox:checked::after {
  content: ""; position: absolute; left: 3px; top: 0;
  width: 5px; height: 10px;
  border: solid var(--color-white); border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.prose ul li.task-list-item.is-checked,
.prose ul li.task-list-item:has(input:checked) {
  color: var(--text-muted);
  text-decoration: line-through;
}

/* Footnotes */
.prose .footnotes { font-size: 0.9rem; color: var(--text-muted); border-top: 1px solid var(--border); padding-top: var(--space-4); margin-top: var(--space-7); }

/* Mermaid */
.mermaid {
  background: var(--color-teal-100);
  border: 1px solid var(--color-teal-200);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin: 1.5em 0;
  overflow-x: auto;
  /* Center the rendered SVG horizontally */
  display: flex;
  justify-content: center;
  align-items: center;
}
.mermaid > svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
}

/* KaTeX */
.katex-display { overflow-x: auto; overflow-y: hidden; padding: 0.5em 0; }

/* ============================================================
   Breadcrumbs
   ============================================================ */
.breadcrumbs__list {
  list-style: none; padding: 0; margin: 0 0 var(--space-3);
  display: flex; flex-wrap: wrap; gap: 0.25rem;
  font-size: 0.88rem; color: var(--text-muted);
}
.breadcrumbs__item { display: inline-flex; align-items: center; gap: 0.5em; }
.breadcrumbs__item a {
  color: var(--text-muted); padding: 0.1rem 0.35rem; border-radius: 4px;
}
.breadcrumbs__item a:hover { background: var(--color-paper-2); color: var(--accent-2); }
.breadcrumbs__sep { color: var(--color-ink-300); }
.breadcrumbs__item [aria-current="page"] { color: var(--color-teal-900); font-weight: 600; }

/* ============================================================
   Section: child cards
   ============================================================ */
.child-grid {
  margin-top: var(--space-7);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border);
}
.child-grid__title {
  font-size: 1.25rem; margin: 0 0 var(--space-4); color: var(--color-teal-900);
}
.child-grid__list {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: var(--space-3);
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.child-card {
  display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto;
  column-gap: var(--space-3); row-gap: var(--space-1); align-items: center;
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  color: var(--text);
  transition: transform var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease), border-color var(--t-fast) var(--ease);
}
.child-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); border-color: var(--color-teal-200); color: var(--color-teal-900); }
.child-card__icon {
  grid-row: 1 / span 2; width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--color-teal-100); border-radius: var(--radius-sm); color: var(--color-teal-700);
}
.child-card__icon svg { width: 18px; height: 18px; }
.child-card__title { font-weight: 600; }
.child-card__link { font-size: 0.85rem; color: var(--text-muted); }
.child-card:hover .child-card__link { color: var(--accent); }

/* Related + page nav */
.related {
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
}
.related__title { font-size: 1.05rem; margin: 0 0 var(--space-3); color: var(--color-teal-900); }
.related__list {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: var(--space-2);
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}
.related__list a {
  display: block; padding: 0.6rem 0.85rem; background: var(--color-paper-2);
  border-radius: var(--radius-sm); border: 1px solid var(--border);
  font-size: 0.93rem;
}
.related__list a:hover { background: var(--color-teal-100); border-color: var(--color-teal-200); color: var(--color-teal-900); }

.page-nav {
  margin-top: var(--space-6); padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  display: grid; gap: var(--space-3);
  grid-template-columns: 1fr auto 1fr; align-items: center;
}
.page-nav__link {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: 0.7rem 1rem; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius-md);
  color: var(--text); box-shadow: var(--shadow-1);
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.page-nav__link:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); color: var(--color-teal-900); }
.page-nav__link--next { float: right; }
.page-nav__icon { color: var(--color-orange-500); }
.page-nav__icon svg { width: 18px; height: 18px; }
.page-nav__meta { display: flex; flex-direction: column; line-height: 1.2; }
.page-nav__label { font-size: 0.72rem; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.05em; }
.page-nav__title { font-weight: 600; }
.page-nav__up { text-align: center; }
.page-nav__up-link { color: var(--text-muted); font-size: 0.92rem; }
.page-nav__next { text-align: right; }

@media (max-width: 720px) {
  .page-nav { grid-template-columns: 1fr; text-align: left; }
  .page-nav__next { text-align: left; }
  .page-nav__link--next { float: none; }
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  margin-top: auto;
  background: linear-gradient(180deg, var(--color-paper-2), var(--color-paper-3));
  border-top: 1px solid var(--border);
  padding-block: var(--space-7) var(--space-5);
}
.site-footer__inner {
  display: grid; gap: var(--space-5);
  grid-template-columns: 1.2fr 1fr 1fr;
  align-items: start;
}
.site-footer__brand { display: flex; gap: var(--space-3); align-items: center; }
.site-footer__brand .logo-mark { width: 48px; height: 48px; }
.site-footer__tagline { margin: 0; font-weight: 600; color: var(--color-teal-900); max-width: 28ch; }
.site-footer__heading { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; margin: 0 0 var(--space-3); color: var(--text-muted); }
.site-footer__nav ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.4rem; }
.site-footer__nav a { color: var(--text-soft); }
.site-footer__nav a:hover { color: var(--accent); }
.site-footer__meta { font-size: 0.85rem; color: var(--text-muted); }
.site-footer__sub { margin-top: var(--space-2); }
@media (max-width: 720px) {
  .site-footer__inner { grid-template-columns: 1fr; }
}

/* App layout fills viewport so footer hugs bottom */
body { min-height: 100vh; display: flex; flex-direction: column; }
.main { flex: 1; }

/* ============================================================
   Accordions (FAQ) — auto-styled <details>
   ============================================================ */
.prose details {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 0; margin: 0.75em 0; overflow: hidden;
  box-shadow: var(--shadow-1);
}
.prose details + details { margin-top: 0.6em; }
.prose details > summary {
  list-style: none; cursor: pointer;
  padding: 0.9rem 1.1rem;
  font-weight: 600; color: var(--color-teal-900);
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
  transition: background var(--t-fast) var(--ease);
}
.prose details > summary::-webkit-details-marker { display: none; }
.prose details > summary::after {
  content: "+"; font-weight: 400; font-size: 1.3rem; color: var(--color-orange-500);
  transition: transform var(--t-fast) var(--ease);
}
.prose details[open] > summary::after { transform: rotate(45deg); }
.prose details > summary:hover { background: var(--color-teal-100); }
.prose details > *:not(summary) { padding: 0 1.1rem 1rem; }

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   Print
   ============================================================ */
@media print {
  .site-header, .site-footer, .page-nav, .related, .child-grid, .code-block__copy { display: none; }
  .prose a { color: var(--text); border: 0; }
}