/* ============================================================
   Library Catalog — Neutral Harmony Bliss palette
   Earthy tans · warm coral · deep blue · lush green · golden beige
   ============================================================ */

:root {
  /* Core palette */
  --color-bg:           #faf3e8;          /* golden beige (page) */
  --color-bg-soft:      #f5ede1;          /* slightly darker cream */
  --color-bg-card:      #fffaf0;          /* card surface */
  --color-bg-inline:    #f0e6d2;          /* inline-code background */
  --color-bg-code:      #fdf6ec;          /* code block background */

  --color-tan:          #c9a87c;
  --color-tan-deep:     #a8855a;
  --color-coral:        #e07856;
  --color-coral-deep:   #c25a3b;
  --color-blue:         #274472;          /* primary brand */
  --color-blue-deep:    #1b2f54;
  --color-blue-soft:    #3a5a8c;
  --color-green:        #5b8c5a;
  --color-green-deep:   #406b40;
  --color-gold:         #d4b483;
  --color-gold-deep:    #b8964e;

  --color-text:         #2a2828;
  --color-text-soft:    #4a4742;
  --color-text-muted:   #7a7568;
  --color-border:       #e6d9c2;
  --color-border-soft:  #f0e6d2;
  --color-shadow:       rgba(40, 30, 20, 0.10);

  /* Typography */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Source Serif 4", "Source Serif Pro", Georgia, "Iowan Old Style", serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Layout */
  --header-height: 64px;
  --container-max: 1400px;
  --content-max: 1100px;       /* prose width: wide on desktop, not full edge-to-edge */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* Transitions */
  --t-fast: 120ms ease;
  --t: 200ms ease;
}

/* ----- Reset & base ----- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
main { flex: 1 0 auto; }

img, svg, video { max-width: 100%; display: block; }

/* Focus visibility */
:focus-visible {
  outline: 2px solid var(--color-coral);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ----- Layout containers ----- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(16px, 3vw, 40px);
}
.prose-container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: clamp(16px, 3vw, 40px);
}

/* On very wide screens, push prose container a touch wider for readability */
@media (min-width: 1500px) {
  :root { --content-max: 1180px; }
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 243, 232, 0.92);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--color-border-soft);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.7) inset, 0 2px 12px var(--color-shadow);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: var(--header-height);
}
.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  color: var(--color-blue);
  text-decoration: none;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.site-header__brand svg { width: 36px; height: 36px; }
.site-header__brand:hover { color: var(--color-coral-deep); }
.site-header__brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.site-header__brand-text small {
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text-soft);
  font-weight: 500;
  font-size: 14.5px;
  text-decoration: none;
  transition: background var(--t), color var(--t), transform var(--t);
}
.site-nav__link svg { width: 18px; height: 18px; }
.site-nav__link:hover {
  background: var(--color-bg-soft);
  color: var(--color-blue);
  transform: translateY(-1px);
}
.site-nav__link.is-active {
  background: var(--color-blue);
  color: #fffaf0;
}
.site-nav__link.is-active:hover {
  background: var(--color-blue-deep);
  color: #fff;
  transform: none;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px;
  color: var(--color-blue);
  cursor: pointer;
}
.nav-toggle svg { width: 20px; height: 20px; }

@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    padding: 8px;
    box-shadow: 0 8px 24px var(--color-shadow);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--t), transform var(--t);
  }
  .site-nav.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .site-nav__link { padding: 12px 14px; border-radius: var(--radius-sm); }
  .site-header__brand-text small { display: none; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-blue);
  color: #e9dec7;
  padding: 48px 0 32px;
  margin-top: 80px;
  flex-shrink: 0;
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px;
}
.site-footer__brand p { margin: 8px 0 0; color: #c4b8a0; font-size: 14px; max-width: 32ch; }
.site-footer__col h4 {
  color: #fffaf0;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 10px;
}
.site-footer__col a {
  display: block;
  color: #d4c8b0;
  text-decoration: none;
  padding: 4px 0;
  font-size: 14.5px;
  transition: color var(--t);
}
.site-footer__col a:hover { color: var(--color-gold); }
.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  margin-top: 32px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: #b3a78f;
}
@media (max-width: 720px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .site-footer__brand { grid-column: 1 / -1; }
  .site-footer__bottom { flex-direction: column; gap: 6px; text-align: center; }
}

/* ============================================================
   HOMEPAGE — HERO
   ============================================================ */
.hero {
  padding: clamp(48px, 8vw, 96px) 0 clamp(32px, 5vw, 64px);
  background:
    radial-gradient(ellipse at top right, rgba(224, 120, 86, 0.10), transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(91, 140, 90, 0.10), transparent 55%),
    linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-soft) 100%);
}
.hero__eyebrow {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(39, 68, 114, 0.08);
  color: var(--color-blue);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}
.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(34px, 5.5vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: var(--color-blue-deep);
  max-width: 22ch;
}
.hero__title em {
  font-style: normal;
  background: linear-gradient(120deg, var(--color-coral), var(--color-gold-deep));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lede {
  font-size: clamp(17px, 1.6vw, 19.5px);
  line-height: 1.6;
  color: var(--color-text-soft);
  max-width: 70ch;
  margin: 0 0 16px;
}
.hero__cta-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-top: 36px;
}
.cta-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 22px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
  box-shadow: 0 1px 2px var(--color-shadow);
}
.cta-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px var(--color-shadow);
  border-color: var(--color-border);
}
.cta-card__icon {
  flex: 0 0 auto;
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: #fffaf0;
}
.cta-card__icon svg { width: 30px; height: 30px; }
.cta-card--blue   .cta-card__icon { background: linear-gradient(135deg, var(--color-blue), var(--color-blue-soft)); }
.cta-card--coral  .cta-card__icon { background: linear-gradient(135deg, var(--color-coral), #f0a07a); }
.cta-card--green  .cta-card__icon { background: linear-gradient(135deg, var(--color-green), #84b56b); }
.cta-card--gold   .cta-card__icon { background: linear-gradient(135deg, var(--color-gold-deep), var(--color-gold)); }

.cta-card__body { flex: 1 1 auto; }
.cta-card__title {
  font-weight: 700;
  font-size: 17px;
  color: var(--color-blue-deep);
  margin: 4px 0 6px;
}
.cta-card__desc {
  font-size: 14.5px;
  color: var(--color-text-soft);
  line-height: 1.5;
  margin: 0;
}
.cta-card__arrow {
  align-self: center;
  color: var(--color-text-muted);
  transition: transform var(--t), color var(--t);
}
.cta-card:hover .cta-card__arrow { color: var(--color-coral); transform: translateX(4px); }

/* Homepage section cards (broader pillars) */
.pillars {
  padding: clamp(48px, 6vw, 80px) 0;
}
.pillars__intro h2 {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.2vw, 36px);
  color: var(--color-blue-deep);
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.pillars__intro p {
  color: var(--color-text-soft);
  max-width: 70ch;
  font-size: 17px;
}
.pillars__grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 22px;
}
.pillar {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: transform var(--t), box-shadow var(--t);
}
.pillar:hover { transform: translateY(-2px); box-shadow: 0 10px 24px var(--color-shadow); }
.pillar h3 {
  font-family: var(--font-serif);
  font-size: 21px;
  color: var(--color-blue-deep);
  margin: 0 0 8px;
}
.pillar p { margin: 0 0 14px; color: var(--color-text-soft); font-size: 15px; }
.pillar__sublist {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
  display: grid;
  gap: 6px;
  border-top: 1px solid var(--color-border-soft);
  padding-top: 14px;
}
.pillar__sublist li { margin: 0; }
.pillar__sublist a {
  display: block;
  font-size: 14px;
  color: var(--color-text-soft);
  text-decoration: none;
  padding: 4px 0;
  border-left: 2px solid transparent;
  padding-left: 10px;
  margin-left: -2px;
  transition: color var(--t), border-color var(--t), padding-left var(--t);
}
.pillar__sublist a:hover {
  color: var(--color-coral-deep);
  border-left-color: var(--color-coral);
  padding-left: 14px;
}

.pillar__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 14.5px;
  color: var(--color-coral-deep);
  text-decoration: none;
}
.pillar__link:hover { color: var(--color-blue); }
.pillar__link::after { content: "→"; transition: transform var(--t); }
.pillar__link:hover::after { transform: translateX(4px); }

/* ============================================================
   CONTENT PAGES
   ============================================================ */
.page-header {
  background: linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-bg) 100%);
  padding: 32px 0 24px;
  border-bottom: 1px solid var(--color-border-soft);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  color: var(--color-text-muted);
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumbs li { display: inline-flex; align-items: center; gap: 6px; }
.breadcrumbs li + li::before {
  content: "›";
  color: var(--color-text-muted);
  padding-right: 4px;
}
.breadcrumbs a {
  color: var(--color-blue-soft);
  text-decoration: none;
  padding: 2px 4px;
  border-radius: 4px;
  transition: background var(--t), color var(--t);
}
.breadcrumbs a:hover { background: var(--color-bg-inline); color: var(--color-blue); }
.breadcrumbs li:last-child { color: var(--color-text-soft); font-weight: 500; }

/* Prose styling — use padding-block so we don't override the
   horizontal padding inherited from .prose-container */
.prose {
  padding-block: 32px 64px;
}
.prose h1 {
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.8vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 8px 0 28px;
  color: var(--color-blue-deep);
  background: linear-gradient(120deg, var(--color-blue-deep) 30%, var(--color-coral-deep) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.prose h2 {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.25;
  margin: 56px 0 16px;
  color: var(--color-blue-deep);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border-soft);
  position: relative;
}
.prose h2::before {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 64px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-coral), var(--color-gold));
}
.prose h3 {
  font-family: var(--font-serif);
  font-size: clamp(18px, 1.9vw, 22px);
  margin: 36px 0 12px;
  color: var(--color-blue);
}
.prose h4 {
  font-size: 16.5px;
  margin: 28px 0 10px;
  color: var(--color-blue-deep);
  font-weight: 700;
}

/* In-page anchor offset for sticky header */
.prose :is(h1, h2, h3, h4, h5, h6) {
  scroll-margin-top: calc(var(--header-height) + 16px);
}
.prose :is(h1, h2, h3, h4, h5, h6) a.header-anchor {
  color: inherit;
  text-decoration: none;
}
.prose :is(h1, h2, h3, h4, h5, h6) a.header-anchor:hover {
  color: var(--color-coral);
}

.prose p {
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.72;
  color: var(--color-text);
}
.prose ul, .prose ol {
  margin: 0 0 20px;
  padding-left: 26px;
}
.prose li { margin-bottom: 8px; line-height: 1.65; }
.prose li::marker { color: var(--color-coral); }

.prose a {
  color: var(--color-coral-deep);
  text-decoration: none;
  font-weight: 500;
  background-image: linear-gradient(transparent calc(100% - 2px), var(--color-coral) calc(100% - 2px));
  background-repeat: no-repeat;
  background-size: 100% 100%;
  transition: color var(--t), background-size var(--t), background-color var(--t);
  padding: 0 2px;
}
.prose a:hover {
  color: var(--color-blue-deep);
  background-color: rgba(224, 120, 86, 0.10);
  border-radius: 3px;
}

.prose strong { color: var(--color-blue-deep); }
.prose blockquote {
  margin: 24px 0;
  padding: 16px 24px;
  background: var(--color-bg-soft);
  border-left: 4px solid var(--color-coral);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-soft);
  font-style: italic;
}
.prose hr {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  margin: 40px 0;
}

/* ============================================================
   INLINE CODE  (blends, no border)
   ============================================================ */
.prose :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--color-bg-inline);
  color: var(--color-blue-deep);
  padding: 0.12em 0.4em;
  border-radius: 4px;
  border: 0;
  font-weight: 500;
}
.prose a code {
  color: inherit;
  background: rgba(224, 120, 86, 0.10);
}

/* ============================================================
   CODE BLOCKS
   ============================================================ */
.code-block {
  position: relative;
  margin: 24px 0;
  background: var(--color-bg-code);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 1px 3px var(--color-shadow);
}
.code-block__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: linear-gradient(180deg, #f7eedf, #f0e6d2);
  border-bottom: 1px solid var(--color-border);
}
.code-block__lang {
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
  color: var(--color-blue);
}
.code-block__copy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  color: var(--color-text-soft);
  border: 1px solid transparent;
  font: 600 12px var(--font-sans);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--t), color var(--t), border-color var(--t);
}
.code-block__copy:hover {
  background: rgba(255, 255, 255, 0.6);
  color: var(--color-blue-deep);
  border-color: var(--color-border);
}
.code-block__copy.is-copied {
  background: var(--color-green);
  color: #fff;
  border-color: var(--color-green);
}
.code-block pre {
  margin: 0;
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.65;
  color: #3a3530;
  background: var(--color-bg-code);
}
.code-block code {
  font-family: inherit;
  font-size: inherit;
  background: none;
  padding: 0;
  color: inherit;
}

/* Custom syntax tokens (applied by client-side highlighter) */
.tok-keyword  { color: #8a3a8a; font-weight: 600; }   /* purple */
.tok-string   { color: #6b8a4a; }                     /* lush green */
.tok-comment  { color: #9a8a70; font-style: italic; }
.tok-number   { color: var(--color-coral-deep); }
.tok-function { color: var(--color-blue); font-weight: 600; }
.tok-builtin  { color: #b8743a; }
.tok-decorator { color: var(--color-gold-deep); font-weight: 600; }

/* ============================================================
   TABLES (responsive)
   ============================================================ */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 24px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  -webkit-overflow-scrolling: touch;
}
.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  min-width: 480px;
}
.table-wrap th {
  text-align: left;
  background: var(--color-blue);
  color: #fffaf0;
  padding: 10px 14px;
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: 0.02em;
}
.table-wrap td {
  padding: 10px 14px;
  border-top: 1px solid var(--color-border-soft);
}
.table-wrap tr:nth-child(even) td { background: var(--color-bg-soft); }

/* ============================================================
   TASK LIST CHECKBOXES (markdown-it-task-lists output)
   Remove leading bullet dot, render as toggleable checkboxes
   ============================================================ */
.prose ul li.task-list-item,
.prose .task-list-item { list-style: none; }
.prose ul:has(li.task-list-item) { padding-left: 4px; }
.prose ul li.task-list-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 8px;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  transition: background var(--t);
}
.prose ul li.task-list-item:hover { background: var(--color-bg-soft); }
.prose ul li.task-list-item > input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-top: 5px;
  border: 1.5px solid var(--color-tan-deep);
  border-radius: 4px;
  background: var(--color-bg-card);
  cursor: pointer;
  position: relative;
  transition: background var(--t), border-color var(--t);
}
.prose ul li.task-list-item > input[type="checkbox"]:hover { border-color: var(--color-coral); }
.prose ul li.task-list-item > input[type="checkbox"]:checked {
  background: var(--color-green);
  border-color: var(--color-green-deep);
}
.prose ul li.task-list-item > input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid #fff;
  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[type="checkbox"]:checked) {
  color: var(--color-text-muted);
  text-decoration: line-through;
}
.prose ul li.task-list-item:has(> input[type="checkbox"]:checked) a { color: var(--color-text-muted); }

/* ============================================================
   FAQ ACCORDIONS
   ============================================================ */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 20px 0;
}
.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--t);
}
.faq-item[open] { box-shadow: 0 4px 12px var(--color-shadow); }
.faq-item > summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 48px 14px 18px;
  font-weight: 600;
  color: var(--color-blue-deep);
  position: relative;
  transition: background var(--t);
}
.faq-item > summary::-webkit-details-marker { display: none; }
.faq-item > summary:hover { background: var(--color-bg-soft); }
.faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  color: var(--color-coral);
  transition: transform var(--t);
  line-height: 1;
}
.faq-item[open] > summary::after { content: "−"; }
.faq-item .faq-answer {
  padding: 4px 18px 16px;
  color: var(--color-text-soft);
  border-top: 1px solid var(--color-border-soft);
}

/* ============================================================
   RELATED PAGES SIDEBAR
   ============================================================ */
.related-pages {
  margin-top: 64px;
  padding: 28px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
}
.related-pages h2 {
  font-family: var(--font-serif);
  font-size: 20px;
  margin: 0 0 16px;
  color: var(--color-blue-deep);
  border: 0;
  padding: 0;
}
.related-pages h2::before { display: none; }
.related-pages ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.related-pages li { margin: 0; }
.related-pages a {
  display: block;
  padding: 12px 14px;
  background: var(--color-bg);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-md);
  color: var(--color-blue);
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 500;
  transition: transform var(--t), border-color var(--t), background var(--t);
  background-image: none;
}
.related-pages a:hover {
  transform: translateY(-2px);
  background: #fff;
  border-color: var(--color-coral);
  color: var(--color-coral-deep);
}

/* ============================================================
   MERMAID THEME OVERRIDES (loaded via mermaid initialize too)
   ============================================================ */
.mermaid {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px;
  margin: 24px 0;
  text-align: center;
  overflow-x: auto;
}

/* ============================================================
   UTILITY
   ============================================================ */
.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;
}

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