/* =========================================================================
   Neutral Elegance — palette and design tokens
   Warm taupe • latte beige • creamy almond • soft rosé • dusty cocoa
   ========================================================================= */
:root {
  --color-cream: #f7f1e7;
  --color-cream-2: #f1e7d7;
  --color-almond: #e7d8c2;
  --color-latte: #d6bfa3;
  --color-rose: #d9b8b1;
  --color-rose-soft: #ecd6d0;
  --color-taupe: #8a6b54;
  --color-taupe-deep: #6e5340;
  --color-cocoa: #4b3a2c;
  --color-cocoa-soft: #6f5b48;
  --color-ink: #2c241d;
  --color-muted: #7a6a5b;
  --color-line: #e2d3bc;
  --color-line-soft: #efe4d2;
  --color-surface: #fcf8f1;
  --color-surface-2: #f3eadb;
  --color-shadow: rgba(75, 58, 44, 0.12);
  --color-shadow-strong: rgba(75, 58, 44, 0.22);

  --accent-leaf: #7e8a5b;
  --accent-sage: #a7b58a;
  --accent-clay: #b27a5a;
  --accent-amber: #c89a5e;
  --accent-plum: #8d6c79;
  --accent-sky: #88a3a8;
  --accent-coral: #cf8a73;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 28px;

  --shadow-sm: 0 1px 2px var(--color-shadow);
  --shadow-md: 0 6px 18px var(--color-shadow);
  --shadow-lg: 0 18px 42px var(--color-shadow-strong);

  --header-height: 68px;
  --page-max: 1500px;
  --content-max: 1180px;
  --prose-max: 80ch;

  --font-sans: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Lora", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --transition-fast: 140ms ease;
  --transition-med: 240ms ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-cream);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(60% 60% at 12% 4%, rgba(217, 184, 177, 0.32), transparent 70%),
    radial-gradient(50% 50% at 92% 8%, rgba(214, 191, 163, 0.30), transparent 70%),
    radial-gradient(60% 50% at 50% 110%, rgba(231, 216, 194, 0.50), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

img, svg { max-width: 100%; height: auto; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

a {
  color: var(--color-taupe-deep);
  text-decoration: none;
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
  background-image: linear-gradient(transparent calc(100% - 1px), var(--color-latte) calc(100% - 1px));
  background-size: 0% 100%;
  background-repeat: no-repeat;
  transition: color var(--transition-fast), background-size var(--transition-med);
}
a:hover, a:focus-visible {
  color: var(--color-cocoa);
  background-size: 100% 100%;
}

main a { text-decoration: underline; text-decoration-color: var(--color-latte); }
main a:hover { text-decoration-color: var(--color-taupe); }

:focus-visible {
  outline: 2px solid var(--color-taupe);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Provide top offset so anchor scrolls don't sit under the sticky header. */
:target { scroll-margin-top: calc(var(--header-height) + 18px); }
h1[id], h2[id], h3[id], h4[id], h5[id], h6[id] {
  scroll-margin-top: calc(var(--header-height) + 18px);
}

/* =========================================================================
   Layout containers
   ========================================================================= */
.container {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 2.5rem);
}

.container--narrow {
  max-width: var(--content-max);
}

main {
  flex: 1 0 auto;
  padding: clamp(1.5rem, 4vw, 3rem) 0 4rem;
}

/* =========================================================================
   Header
   ========================================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(252, 248, 241, 0.86);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--color-line);
  box-shadow: 0 1px 0 rgba(255,255,255,0.6) inset, 0 6px 18px rgba(75, 58, 44, 0.06);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-cocoa);
  font-weight: 600;
  letter-spacing: 0.01em;
  background: none;
}
.brand:hover { color: var(--color-taupe-deep); background: none; }
.brand__mark {
  width: 40px; height: 40px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-rose-soft), var(--color-almond));
  box-shadow: var(--shadow-sm);
}
.brand__name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.1;
}
.brand__name span {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-muted);
  font-weight: 500;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  color: var(--color-cocoa);
  border-radius: 10px;
  padding: 0.4rem 0.55rem;
  cursor: pointer;
  align-items: center;
  gap: 0.5rem;
}
.nav-toggle:focus-visible { outline-offset: 2px; }
.nav-toggle svg { width: 18px; height: 18px; }

.site-nav { display: flex; align-items: center; gap: 0.25rem; }

.site-nav__list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.85rem;
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-cocoa-soft);
  background: none;
}
.site-nav__link:hover,
.site-nav__link:focus-visible {
  background: var(--color-surface-2);
  color: var(--color-cocoa);
}
.site-nav__link[aria-current="page"],
.site-nav__link.is-active {
  background: var(--color-rose-soft);
  color: var(--color-cocoa);
  box-shadow: inset 0 0 0 1px rgba(178, 122, 90, 0.18);
}
.site-nav__icon {
  width: 18px; height: 18px;
  display: inline-flex; align-items: center; justify-content: center;
}

/* =========================================================================
   Footer
   ========================================================================= */
.site-footer {
  flex-shrink: 0;
  margin-top: auto;
  background: linear-gradient(180deg, transparent 0%, rgba(214, 191, 163, 0.20) 100%);
  border-top: 1px solid var(--color-line);
  padding: 2.5rem 0 2rem;
  color: var(--color-cocoa-soft);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 2rem;
  align-items: start;
}
.site-footer__brand p { margin-top: 0.6rem; max-width: 38ch; color: var(--color-muted); }
.site-footer h4 {
  font-family: var(--font-serif);
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin: 0 0 0.6rem;
  color: var(--color-cocoa);
}
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 0.25rem 0; }
.site-footer a { color: var(--color-cocoa-soft); }
.site-footer a:hover { color: var(--color-cocoa); }
.site-footer__bottom {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-line);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* =========================================================================
   Homepage hero
   ========================================================================= */
.hero {
  padding: clamp(2rem, 6vw, 4.5rem) 0 clamp(2rem, 5vw, 3.5rem);
  position: relative;
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}
.hero__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-taupe);
}
.hero h1 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(2rem, 4.4vw, 3.4rem);
  line-height: 1.12;
  margin: 0.5rem 0 1rem;
  letter-spacing: -0.01em;
  color: var(--color-cocoa);
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--accent-clay), var(--color-taupe));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lead {
  font-size: clamp(1rem, 1.2vw, 1.15rem);
  color: var(--color-cocoa-soft);
  max-width: 56ch;
}
.hero__cta {
  margin-top: clamp(1.25rem, 3vw, 2rem);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.85rem;
  max-width: 720px;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1.05rem;
  background: var(--color-surface);
  color: var(--color-cocoa);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.96rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-med), box-shadow var(--transition-med),
              border-color var(--transition-med), background var(--transition-med);
}
.cta-button:hover,
.cta-button:focus-visible {
  background: linear-gradient(180deg, #fffaf1 0%, var(--color-surface) 100%);
  border-color: var(--color-latte);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: var(--color-cocoa);
}
.cta-button__icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center; justify-content: center;
  flex: 0 0 38px;
  color: #fff;
}
.cta-button__icon svg { width: 20px; height: 20px; }
.cta-button__text { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.cta-button__text strong { font-weight: 600; }
.cta-button__text span { font-size: 0.78rem; color: var(--color-muted); }

.icon-bg--architecture { background: linear-gradient(135deg, var(--accent-plum), var(--accent-clay)); }
.icon-bg--registration { background: linear-gradient(135deg, var(--accent-leaf), var(--accent-sage)); }
.icon-bg--badge       { background: linear-gradient(135deg, var(--accent-amber), var(--color-taupe)); }
.icon-bg--sky         { background: linear-gradient(135deg, var(--accent-sky), #5e7c81); }
.icon-bg--coral       { background: linear-gradient(135deg, var(--accent-coral), var(--accent-clay)); }

.hero__art {
  position: relative;
  aspect-ratio: 4 / 3.4;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.6), rgba(247, 241, 231, 0)) ,
    radial-gradient(70% 100% at 0% 0%, var(--color-rose-soft), transparent 60%),
    radial-gradient(80% 100% at 100% 100%, var(--color-almond), transparent 65%),
    linear-gradient(135deg, var(--color-cream-2), var(--color-cream));
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: grid;
  place-items: center;
}

.hero__art svg { width: 78%; height: auto; }

/* =========================================================================
   Section blocks (home)
   ========================================================================= */
.section {
  padding: clamp(2rem, 4vw, 3.5rem) 0;
}
.section + .section { padding-top: 0; }

.section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.section__head h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  margin: 0;
  color: var(--color-cocoa);
}
.section__head p { color: var(--color-muted); margin: 0; max-width: 60ch; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.section-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1.4rem 1.4rem 1.6rem;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  color: var(--color-cocoa);
  transition: transform var(--transition-med), box-shadow var(--transition-med),
              border-color var(--transition-med);
  background-image: none;
}
.section-card:hover,
.section-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-latte);
  background: linear-gradient(180deg, #fffaf1 0%, var(--color-surface) 100%);
  color: var(--color-cocoa);
}
.section-card__icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center; justify-content: center;
  color: #fff;
}
.section-card__icon svg { width: 22px; height: 22px; }
.section-card h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.2rem;
}
.section-card p { margin: 0; color: var(--color-muted); font-size: 0.95rem; }
.section-card__link {
  margin-top: auto;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-taupe-deep);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  text-decoration: none;
  background: none;
}
.section-card__link::after {
  content: "›";
  transform: translateX(0);
  transition: transform var(--transition-med);
}
.section-card:hover .section-card__link::after { transform: translateX(4px); }

.intro-prose {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 3vw, 3rem);
}
.intro-prose p {
  margin: 0 0 1rem;
  color: var(--color-cocoa-soft);
}

/* =========================================================================
   Content / article styles
   ========================================================================= */
.content-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  max-width: var(--content-max);
  margin: 0 auto;
}

.content-shell--with-aside {
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 3rem;
  max-width: var(--page-max);
  align-items: start;
}

.breadcrumbs {
  font-size: 0.86rem;
  color: var(--color-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
}
.breadcrumbs a {
  color: var(--color-cocoa-soft);
  background: none;
}
.breadcrumbs a:hover { color: var(--color-cocoa); }
.breadcrumbs__sep { color: var(--color-latte); }
.breadcrumbs__current { color: var(--color-cocoa); font-weight: 500; }

article.prose {
  font-size: 1.02rem;
  max-width: none;
}

article.prose h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 3.4vw, 2.7rem);
  line-height: 1.15;
  margin: 0 0 1.25rem;
  background: linear-gradient(120deg, var(--accent-clay) 0%, var(--color-taupe-deep) 60%, var(--accent-plum) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: -0.005em;
}

article.prose h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 2vw, 1.7rem);
  margin: 2.4rem 0 0.85rem;
  padding-bottom: 0.45rem;
  color: var(--color-cocoa);
  position: relative;
  border-bottom: 1px solid var(--color-line);
}
article.prose h2::before {
  content: "";
  position: absolute;
  left: 0; bottom: -1px;
  width: 56px; height: 2px;
  background: linear-gradient(90deg, var(--accent-clay), var(--color-taupe));
  border-radius: 2px;
}

article.prose h3 {
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 1.6vw, 1.3rem);
  margin: 1.9rem 0 0.6rem;
  color: var(--color-cocoa);
}
article.prose h4 {
  font-size: 1.02rem;
  margin: 1.5rem 0 0.5rem;
  color: var(--color-cocoa-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

article.prose p {
  margin: 0 0 1.1rem;
  color: var(--color-ink);
}

article.prose ul, article.prose ol {
  margin: 0 0 1.25rem 0;
  padding-left: 1.4rem;
}
article.prose li { margin: 0.3rem 0; }
article.prose li::marker { color: var(--color-taupe); }

article.prose strong { color: var(--color-cocoa); }

article.prose hr {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-line), transparent);
  margin: 2.25rem 0;
}

article.prose blockquote {
  margin: 1.25rem 0;
  padding: 0.6rem 1.1rem;
  border-left: 3px solid var(--accent-clay);
  background: var(--color-surface-2);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-cocoa-soft);
}

/* Anchor link mark next to headings */
article.prose .anchor-mark {
  margin-left: 0.4rem;
  opacity: 0;
  color: var(--color-latte);
  font-weight: 400;
  font-size: 0.85em;
  transition: opacity var(--transition-fast);
}
article.prose h2:hover .anchor-mark,
article.prose h3:hover .anchor-mark,
article.prose h4:hover .anchor-mark { opacity: 1; }

/* =========================================================================
   Inline code & code blocks
   ========================================================================= */
:not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.08em 0.36em;
  background: rgba(214, 191, 163, 0.28);
  color: var(--color-cocoa);
  border-radius: 5px;
  border: none;
}

figure.code-block {
  margin: 1.5rem 0;
  background: #fbf6ec;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.code-block__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.45rem 0.7rem 0.45rem 0.95rem;
  background: linear-gradient(180deg, #f3eadb, #ece1cc);
  border-bottom: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-muted);
}
.code-block__copy {
  background: var(--color-surface);
  color: var(--color-cocoa);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  padding: 0.32rem 0.55rem;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}
.code-block__copy:hover {
  background: #fffaf0;
  border-color: var(--color-latte);
  color: var(--color-cocoa);
}
.code-block__copy.is-copied {
  background: var(--color-rose-soft);
  border-color: var(--color-rose);
  color: var(--color-cocoa);
}
.code-block__copy svg { flex-shrink: 0; }

figure.code-block pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  background: transparent;
  color: var(--color-cocoa);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.55;
  tab-size: 4;
}
figure.code-block code {
  background: none;
  padding: 0;
  border: 0;
  color: inherit;
  font-size: inherit;
}

/* Prism token colors tuned to Neutral Elegance */
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: #a3917a; font-style: italic; }
.token.punctuation { color: #6e5340; }
.token.namespace { opacity: 0.7; }
.token.property, .token.tag, .token.constant, .token.symbol, .token.deleted { color: #b27a5a; }
.token.boolean, .token.number { color: #8d6c79; }
.token.selector, .token.attr-name, .token.string, .token.char, .token.builtin, .token.inserted { color: #7e8a5b; }
.token.operator, .token.entity, .token.url, .language-css .token.string, .style .token.string { color: #88a3a8; }
.token.atrule, .token.attr-value, .token.keyword { color: #a4664a; }
.token.function, .token.class-name { color: #6f5b48; font-weight: 600; }
.token.regex, .token.important, .token.variable { color: #cf8a73; }
.token.important, .token.bold { font-weight: 600; }
.token.italic { font-style: italic; }

/* =========================================================================
   Tables
   ========================================================================= */
.table-wrap {
  overflow-x: auto;
  margin: 1.4rem 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  -webkit-overflow-scrolling: touch;
}
.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  min-width: 540px;
}
.table-wrap th, .table-wrap td {
  text-align: left;
  padding: 0.65rem 0.9rem;
  border-bottom: 1px solid var(--color-line-soft);
  vertical-align: top;
}
.table-wrap thead th {
  background: linear-gradient(180deg, #f3eadb, #ece1cc);
  color: var(--color-cocoa);
  font-weight: 600;
  font-family: var(--font-serif);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
}
.table-wrap tbody tr:nth-child(even) { background: rgba(231, 216, 194, 0.16); }
.table-wrap tbody tr:hover { background: rgba(217, 184, 177, 0.18); }
.table-wrap tbody tr:last-child td { border-bottom: 0; }

/* =========================================================================
   Task list (checkboxes inline)
   ========================================================================= */
.task-list {
  list-style: none;
  padding-left: 0.4rem;
}
.task-list .task-item { padding: 0.05rem 0; margin: 0.15rem 0; }
.task-item__label {
  display: inline-flex;
  align-items: flex-start;
  gap: 0.6rem;
  cursor: pointer;
  line-height: 1.55;
}
.task-item__checkbox {
  appearance: none;
  -webkit-appearance: none;
  width: 1.05em;
  height: 1.05em;
  margin: 0.22em 0 0;
  flex-shrink: 0;
  border: 1.5px solid var(--color-latte);
  border-radius: 5px;
  background: var(--color-surface);
  display: inline-grid;
  place-content: center;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.task-item__checkbox:hover {
  border-color: var(--color-taupe);
  background: #fffaf0;
}
.task-item__checkbox::after {
  content: "";
  width: 0.5em; height: 0.5em;
  transform: scale(0);
  transition: transform var(--transition-fast);
  background: var(--color-taupe-deep);
  border-radius: 2px;
}
.task-item__checkbox:checked {
  background: var(--color-rose-soft);
  border-color: var(--color-taupe);
}
.task-item__checkbox:checked::after { transform: scale(1); }
.task-item__checkbox:focus-visible {
  outline: 2px solid var(--color-taupe);
  outline-offset: 2px;
}
.task-item__checkbox:checked + .task-item__text {
  color: var(--color-muted);
  text-decoration: line-through;
  text-decoration-color: var(--color-latte);
}
.task-item__text { transition: color var(--transition-fast); }

/* =========================================================================
   FAQ accordions
   ========================================================================= */
.faq-item {
  margin: 0.7rem 0;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.faq-item[open] {
  border-color: var(--color-latte);
  box-shadow: var(--shadow-md);
}
.faq-item__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.9rem 1.1rem;
  cursor: pointer;
  font-family: var(--font-serif);
  font-size: 1.02rem;
  color: var(--color-cocoa);
  list-style: none;
  position: relative;
}
.faq-item__summary::-webkit-details-marker { display: none; }
.faq-item__summary::after {
  content: "";
  width: 10px; height: 10px;
  border-right: 2px solid var(--color-taupe);
  border-bottom: 2px solid var(--color-taupe);
  transform: rotate(45deg);
  transition: transform var(--transition-med);
  flex-shrink: 0;
}
.faq-item[open] .faq-item__summary::after { transform: rotate(-135deg); }
.faq-item__summary:hover { background: var(--color-surface-2); }
.faq-item__body { padding: 0 1.1rem 1rem; }
.faq-item__body > *:first-child { margin-top: 0; }
.faq-item__body > *:last-child { margin-bottom: 0; }

/* =========================================================================
   Mermaid containers
   ========================================================================= */
.mermaid {
  margin: 1.5rem 0;
  padding: 1.2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  text-align: center;
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}

/* =========================================================================
   Related pages aside
   ========================================================================= */
.related-aside {
  position: sticky;
  top: calc(var(--header-height) + 1rem);
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  font-size: 0.92rem;
}
.related-aside h4 {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-cocoa-soft);
}
.related-aside ul { list-style: none; margin: 0; padding: 0; }
.related-aside li { margin: 0.3rem 0; }
.related-aside a {
  color: var(--color-cocoa-soft);
  display: inline-block;
  padding: 0.15rem 0;
  background: none;
}
.related-aside a:hover { color: var(--color-cocoa); }
.related-aside a.is-current { color: var(--color-cocoa); font-weight: 600; }
.related-aside__group + .related-aside__group { margin-top: 1.1rem; padding-top: 1.1rem; border-top: 1px solid var(--color-line-soft); }

/* =========================================================================
   Bottom "Related" tile grid (content pages)
   ========================================================================= */
.related-grid {
  margin-top: 2.5rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--color-line);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}
.related-grid__heading {
  grid-column: 1 / -1;
  font-family: var(--font-serif);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-muted);
  margin: 0;
}
.related-tile {
  display: block;
  padding: 1rem 1.1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  color: var(--color-cocoa);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
  background-image: none;
}
.related-tile:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-latte);
  color: var(--color-cocoa);
}
.related-tile__kicker {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-muted);
}
.related-tile__title {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  margin-top: 0.2rem;
}

/* =========================================================================
   Responsive adjustments
   ========================================================================= */
@media (max-width: 960px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__art { max-width: 480px; margin: 0 auto; }
  .content-shell--with-aside {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }
  .related-aside { position: static; }
  .intro-prose { grid-template-columns: 1fr; }
  .site-footer__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-line);
    padding: 0.6rem clamp(1rem, 3vw, 2.5rem) 1rem;
    box-shadow: var(--shadow-md);
    transform: translateY(-150%);
    transition: transform var(--transition-med);
  }
  .site-nav[data-open="true"] { transform: translateY(0); }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
  }
  .site-nav__link { padding: 0.7rem 0.85rem; }
  .site-footer__grid { grid-template-columns: 1fr; }
}

@media (min-width: 1400px) {
  html { font-size: 18px; }
}

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