/* ================================================================
   OOXML Docs – site.css
   ================================================================ */

/* ── Self-hosted fonts ────────────────────────────────── */
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 400; font-display: swap; src: url('/assets/fonts/inter-400-normal-latin.woff2') format('woff2'); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 500; font-display: swap; src: url('/assets/fonts/inter-500-normal-latin.woff2') format('woff2'); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 600; font-display: swap; src: url('/assets/fonts/inter-600-normal-latin.woff2') format('woff2'); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 700; font-display: swap; src: url('/assets/fonts/inter-700-normal-latin.woff2') format('woff2'); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 400; font-display: swap; src: url('/assets/fonts/jbmono-400-normal-latin.woff2') format('woff2'); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 500; font-display: swap; src: url('/assets/fonts/jbmono-500-normal-latin.woff2') format('woff2'); unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD; }

/* ── Design tokens ── */
:root {
  --bg:          #ffffff;
  --surface:     #f6f8fc;
  --surface-2:   #edf0f8;
  --border:      #dde2ef;
  --text:        #111827;
  --muted:       #5c6680;
  --accent:      #2563eb;
  --accent-2:    #1d4ed8;
  --code-bg:     #f3f4f6;
  --code-text:   #1f2328;
  --header-h:    56px;
  --footer-h:    42px;
  --sidebar-w:   264px;
  --toc-w:       212px;
  --radius:      10px;
  --radius-sm:   6px;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:   0 4px 16px rgba(0,0,0,.08), 0 1px 3px rgba(0,0,0,.05);
  --transition:  180ms ease;
}

html[data-theme='dark'] {
  --bg:          #0c0e17;
  --surface:     #131621;
  --surface-2:   #1b1e2d;
  --border:      #252a40;
  --text:        #e2e8f8;
  --muted:       #8892b0;
  --accent:      #60a5fa;
  --accent-2:    #93c5fd;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.2);
  --shadow-md:   0 4px 20px rgba(0,0,0,.35), 0 1px 4px rgba(0,0,0,.2);
  --code-bg:     #161b22;
  --code-text:   #e6edf3;
}

/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 16px;
  scroll-padding-top: calc(var(--header-h) + 1.25rem);
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
  padding-bottom: var(--footer-h);
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); text-decoration: underline; }

code, pre {
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  /* frosted glass */
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: background var(--transition), border-color var(--transition);
}

.site-header__inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--footer-h);
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: background var(--transition), border-color var(--transition);
}

.site-footer__inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: .8rem;
  color: var(--muted);
}

.site-footer__links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-footer__link {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--transition);
}

.site-footer__link:hover {
  color: var(--fg);
}

/* Brand */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  text-decoration: none;
  flex-shrink: 0;
}

.site-brand__logo {
  width: 30px;
  height: 30px;
  border-radius: 7px;
  background: var(--accent);
  display: grid;
  place-items: center;
  font-size: .65rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -.5px;
  flex-shrink: 0;
  user-select: none;
}

.site-brand__name {
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.015em;
}

.site-brand__name span { color: var(--accent); }

/* ── Spec navigation (header center) ── */
.spec-nav {
  display: flex;
  align-items: center;
  gap: .2rem;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  flex: 1;
  justify-content: center;
  max-width: 580px;
}

.spec-nav::-webkit-scrollbar { display: none; }

.spec-nav__link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .3rem .65rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}

.spec-nav__link:hover { text-decoration: none; }

.spec-nav__badge {
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .04em;
  padding: .1rem .4rem;
  border-radius: 4px;
  line-height: 1.4;
  /* coloured per spec */
  background: var(--spec-color, var(--surface-2));
  color: var(--spec-badge-text, var(--muted));
}

.spec-nav__label {
  font-size: .8rem;
  font-weight: 500;
  color: var(--muted);
  transition: color var(--transition);
}

.spec-nav__link:hover .spec-nav__label,
.spec-nav__link.is-active .spec-nav__label { color: var(--text); }

/* Spec colour tokens applied via data-spec attribute */
[data-spec="wordml"]        { --spec-color: #2563eb; --spec-color-alpha: #dbeafe; --spec-badge-text: #fff; }
[data-spec="presentationml"]{ --spec-color: #ea580c; --spec-color-alpha: #ffedd5; --spec-badge-text: #fff; }
[data-spec="spreadsheetml"] { --spec-color: #16a34a; --spec-color-alpha: #dcfce7; --spec-badge-text: #fff; }
[data-spec="drawingml"]     { --spec-color: #9333ea; --spec-color-alpha: #f3e8ff; --spec-badge-text: #fff; }

html[data-theme='dark'] [data-spec="wordml"]         { --spec-color: #3b82f6; --spec-color-alpha: #1e3a5f; }
html[data-theme='dark'] [data-spec="presentationml"] { --spec-color: #f97316; --spec-color-alpha: #431407; }
html[data-theme='dark'] [data-spec="spreadsheetml"]  { --spec-color: #22c55e; --spec-color-alpha: #052e16; }
html[data-theme='dark'] [data-spec="drawingml"]      { --spec-color: #a855f7; --spec-color-alpha: #2e1065; }

/* Active state: show a coloured underline dot */
.spec-nav__link.is-active .spec-nav__badge {
  box-shadow: 0 0 0 2px var(--spec-color);
}

/* ── Theme toggle (icon button) ── */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition),
              color var(--transition), transform 80ms;
}

.theme-toggle:hover {
  background: var(--surface-2);
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle:active { transform: scale(.88); }
/* Hide all icons by default; show only the active-mode one */
.theme-toggle svg { width: 16px; height: 16px; display: none; }

html[data-theme-mode='light'] .theme-toggle .icon-sun  { display: block; }
html[data-theme-mode='dark']  .theme-toggle .icon-moon { display: block; }
html[data-theme-mode='auto']  .theme-toggle .icon-auto { display: block; }
html:not([data-theme-mode])   .theme-toggle .icon-auto { display: block; }

/* ── Site-wide container ── */
.site-main {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

/* ── Legal page ───────────────────────────────────────────────── */
.legal-content {
  max-width: 740px;
  margin: 3rem auto;
  color: var(--text);
  line-height: 1.75;
}

.legal-content h1 { font-size: 1.75rem; margin: 0 0 2rem; color: var(--fg); }
.legal-content h2 { font-size: 1.15rem; font-weight: 600; margin: 2.5rem 0 .6rem; color: var(--fg); padding-bottom: .3rem; border-bottom: 1px solid var(--border); }
.legal-content h3 { font-size: .95rem; font-weight: 600; margin: 1.5rem 0 .4rem; color: var(--fg); }
.legal-content p  { margin: .6rem 0; }
.legal-content ul, .legal-content ol { margin: .5rem 0 .5rem 1.5rem; }
.legal-content li { margin: .3rem 0; }
.legal-content hr { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }
.legal-content a  { color: var(--accent); }
.legal-content a:hover { text-decoration: underline; }
.legal-content table { width: 100%; border-collapse: collapse; font-size: .85rem; margin: 1rem 0; }
.legal-content th, .legal-content td { padding: .5rem .75rem; border: 1px solid var(--border); text-align: left; }
.legal-content th { background: var(--surface); font-weight: 600; }
.legal-content pre { background: var(--code-bg); color: var(--code-text); padding: 1.25rem 1.5rem; border-radius: var(--radius); overflow-x: auto; font-size: .8rem; line-height: 1.6; margin: 1rem 0; }
.legal-content code:not(pre code) { background: var(--surface); padding: .15em .4em; border-radius: 4px; font-size: .85em; }
.legal-content em { font-size: .85rem; color: var(--muted); }

/* ── Contact form ─────────────────────────────────────────────── */
.contact-form { display: flex; flex-direction: column; gap: 1.25rem; margin-top: 2rem; }
.contact-form__group { display: flex; flex-direction: column; gap: .4rem; }
.contact-form__group label { font-size: .85rem; font-weight: 500; color: var(--fg); }
.contact-form__group input,
.contact-form__group textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: .9rem;
  padding: .6rem .85rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
  box-sizing: border-box;
}
.contact-form__group input:focus,
.contact-form__group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}
.contact-form__group textarea { resize: vertical; min-height: 140px; line-height: 1.6; }
.contact-form__submit {
  align-self: flex-start;
  background: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  cursor: pointer;
  font-family: inherit;
  font-size: .9rem;
  font-weight: 500;
  padding: .6rem 1.4rem;
  transition: opacity var(--transition);
}
.contact-form__submit:hover { opacity: .85; }
.contact-form__note { font-size: .78rem; color: var(--muted); margin-top: -.5rem; }
.contact-form__status { font-size: .88rem; padding: .65rem 1rem; border-radius: var(--radius-sm); border: 1px solid; }
.contact-form__status--ok  { background: color-mix(in srgb, #22c55e 12%, transparent); border-color: #22c55e; color: #16a34a; }
.contact-form__status--err { background: color-mix(in srgb, #ef4444 12%, transparent); border-color: #ef4444; color: #dc2626; }
[data-theme='dark'] .contact-form__status--ok  { color: #4ade80; }
[data-theme='dark'] .contact-form__status--err { color: #f87171; }

/* ── GDPR privacy notice modal ───────────────────────────────── */
.gdpr-overlay {
  position: fixed;
  inset: 0;
  z-index: 199;
  background: rgba(0, 0, 0, .55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  animation: gdpr-fade 1s ease;
}
.gdpr-overlay.is-hidden { display: none; }

.gdpr-modal {
  position: fixed;
  bottom: calc(var(--footer-h) + 1.5rem);
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: .9rem;
  width: min(440px, calc(100vw - 2.5rem));
  height: fit-content;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius, 8px);
  padding: 1.75rem 1.75rem 1.5rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .35);
  font-size: .875rem;
  color: var(--fg);
  animation: gdpr-in .55s cubic-bezier(.34,1.56,.64,1);
}
.gdpr-modal.is-hidden { display: none; }

.gdpr-modal__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -.01em;
}
.gdpr-modal__text { margin: 0; line-height: 1.6; color: var(--muted); }
.gdpr-modal__text strong { color: var(--fg); }
.gdpr-modal__text a { color: var(--accent); }
.gdpr-modal__text code { font-size: .78rem; }
.gdpr-modal__actions { display: flex; justify-content: flex-end; padding-top: .25rem; }
.gdpr-modal__btn {
  cursor: pointer;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  padding: .45rem 1.4rem;
  font-size: .85rem;
  font-family: inherit;
  font-weight: 500;
  transition: opacity var(--transition);
}
.gdpr-modal__btn:hover { opacity: .85; }

@keyframes gdpr-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes gdpr-in {
  from { transform: translateX(-50%) translateY(16px); opacity: 0; }
  to   { transform: translateX(-50%) translateY(0);    opacity: 1; }
}

/* ================================================================
   HOME PAGE
   ================================================================ */

.home-hero {
  min-height: calc(100dvh - var(--header-h) - 2rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 4rem 1rem 6rem;
  text-align: center;
}

.home-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  border-radius: 99px;
  padding: .25rem .85rem;
}

.home-hero h1 {
  margin: 0;
  font-size: clamp(1.9rem, 4.5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -.04em;
  line-height: 1.18;
  color: var(--text);
  max-width: 580px;
}

.home-hero > p {
  margin: 0;
  color: var(--muted);
  font-size: 1.0625rem;
  max-width: 480px;
}

/* ── Search box ── */
.search-wrap {
  position: relative;
  width: min(660px, 100%);
  margin-top: .5rem;
}

.search-wrap__icon {
  position: absolute;
  left: .95rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: .875rem 1rem .875rem 2.8rem;
  font-size: 1rem;
  font-family: inherit;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text);
  outline: none;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent),
              var(--shadow-sm);
}

.search-input::placeholder { color: var(--muted); }

.search-results {
  position: absolute;
  top: calc(100% + .5rem);
  left: 0;
  right: 0;
  margin: 0;
  padding: .3rem;
  list-style: none;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  z-index: 50;
  text-align: left;
}

.search-results:empty { display: none; }

.search-results li a {
  display: block;
  padding: .6rem .85rem;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: .875rem;
  font-weight: 500;
  transition: background var(--transition);
}

.search-results li a:hover {
  background: var(--surface);
  text-decoration: none;
}

.search-results li p {
  margin: 0;
  padding: 0 .85rem .55rem;
  font-size: .775rem;
  color: var(--muted);
  line-height: 1.45;
}

.search-results__empty {
  padding: .875rem;
  color: var(--muted);
  font-size: .84rem;
  text-align: center;
}

/* ================================================================
   DOCS LAYOUT  (three-column grid)
   ================================================================ */

.docs-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  grid-template-areas: "left main right";
  gap: 1.5rem;
  align-items: start;
  padding-top: 1.5rem;
}

/* ── Sidebar shell ── */
.docs-sidebar {
  position: sticky;
  top: calc(var(--header-h) + .75rem);
  max-height: calc(100dvh - var(--header-h) - 1.75rem);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}

.docs-sidebar--left  { grid-area: left; }
.docs-sidebar--right { grid-area: right; }

.docs-sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .75rem 1rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--surface);
  z-index: 1;
}

.docs-sidebar__title {
  margin: 0;
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--muted);
}

/* ── Sidebar collapse ── */
.sidebar-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}

.sidebar-toggle:hover { background: var(--surface-2); color: var(--text); }

.docs-sidebar.is-collapsed .schema-tree,
.docs-sidebar.is-collapsed .docs-sidebar__nav { display: none; }

/* ── Schema treeview ── */
.schema-tree { padding: .5rem .4rem; }

.tree-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

/* Nested indentation with connector line */
.tree-list .tree-list {
  padding-left: .875rem;
  border-left: 1px solid var(--border);
  margin-left: .625rem;
  margin-top: .1rem;
}

.tree-list li { margin: .1rem 0; }

/* Leaf link */
.tree-list li > a {
  display: block;
  padding: .28rem .55rem;
  border-radius: var(--radius-sm);
  font-size: .825rem;
  color: var(--muted);
  transition: color var(--transition), background var(--transition);
}

.tree-list li > a:hover {
  color: var(--text);
  background: var(--surface-2);
  text-decoration: none;
}

/* Node with children (<details>) */
.tree-node > summary {
  display: flex;
  align-items: center;
  padding: .28rem .55rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  list-style: none;
  font-size: .825rem;
  color: var(--text);
  user-select: none;
  transition: background var(--transition);
  gap: .3rem;
}

.tree-node > summary::-webkit-details-marker { display: none; }

/* Animated chevron via pseudo-element */
.tree-node > summary::before {
  content: '';
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 14'%3E%3Cpath d='M5 3l4 4-4 4' stroke='%235c6680' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  transition: transform .2s ease;
}

html[data-theme='dark'] .tree-node > summary::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 14'%3E%3Cpath d='M5 3l4 4-4 4' stroke='%238892b0' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

.tree-node[open] > summary::before { transform: rotate(90deg); }

.tree-node > summary:hover { background: var(--surface-2); }

.tree-node > summary a {
  color: inherit;
  font-size: inherit;
  flex: 1;
  display: block;
}

.tree-node > summary a:hover { text-decoration: none; }

/* ================================================================
   DOCS MAIN CONTENT
   ================================================================ */

.docs-content { grid-area: main; min-width: 0; }

.docs-content__header {
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.docs-content__header h1 {
  margin: 0 0 .4rem;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -.03em;
}

.docs-summary {
  margin: 0;
  color: var(--muted);
  font-size: 1.0375rem;
}

/* Relations: pill badges */
.docs-relations {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1rem;
}

.docs-relations__group {
  flex: 1;
  min-width: 150px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .75rem 1rem;
}

.docs-relations__group h2 {
  margin: 0 0 .5rem;
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--muted);
}

.docs-relations__group ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
}

.docs-relations__group ul li a {
  display: inline-block;
  padding: .2rem .6rem;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  border-radius: 99px;
  font-size: .775rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent);
  transition: background var(--transition);
}

.docs-relations__group ul li a:hover {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  text-decoration: none;
}

/* Article body typography */
.docs-content__body h2 {
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -.025em;
  margin: 2rem 0 .75rem;
  padding-bottom: .4rem;
  border-bottom: 1px solid var(--border);
}

.docs-content__body h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.5rem 0 .5rem;
}

.docs-content__body p { margin: 0 0 1rem; }

.docs-content__body :not(pre) > code {
  font-size: .85em;
  padding: .15em .45em;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

/* ── Code tabs ── */
.code-tabs {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 1.25rem 0;
}

.code-tabs__nav {
  display: flex;
  gap: .25rem;
  padding: .5rem .6rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.code-tabs__nav button {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: .3rem .75rem;
  border-radius: var(--radius-sm);
  font-size: .8rem;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.code-tabs__nav button:hover { background: var(--surface); color: var(--text); }

.code-tabs__nav button.is-active {
  background: var(--accent);
  color: #fff;
  font-weight: 500;
}

.code-tabs pre {
  margin: 0;
  padding: 0;
  background: var(--code-bg);
  color: var(--code-text);
  overflow-x: auto;
  font-size: .85rem;
  line-height: 1.5;
  position: relative;
}

/* Reset: no pills inside code blocks */
.code-tabs pre code {
  display: block;
  padding: 1.1rem 0 1.1rem 1rem; /* 1rem left = fallback when JS/line-numbers inactive */
  background: transparent;
  border: none;
  border-radius: 0;
  font-size: inherit;
  color: inherit;
  counter-reset: code-line;
}

/* ── Line numbers ── */
.code-line {
  display: block;
  padding: 0 1.5rem 0 3rem; /* + code's 1rem left = 4rem total from pre edge */
  position: relative;
  counter-increment: code-line;
}

.code-line::before {
  content: counter(code-line);
  position: absolute;
  left: 0;
  width: 3rem;
  text-align: right;
  padding-right: .75rem;
  color: var(--muted);
  opacity: .4;
  user-select: none;
  pointer-events: none;
  border-right: 1px solid color-mix(in srgb, var(--border) 60%, transparent);
  font-size: .8em;
}

/* ── Copy button ── */
.code-copy-btn {
  position: absolute;
  top: .55rem;
  right: .55rem;
  font-size: .7rem;
  font-family: inherit;
  font-weight: 500;
  padding: .2rem .6rem;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
  background: color-mix(in srgb, var(--surface) 30%, transparent);
  color: var(--code-text);
  opacity: .5;
  cursor: pointer;
  transition: opacity var(--transition), background var(--transition),
              color var(--transition), border-color var(--transition);
  z-index: 2;
  backdrop-filter: blur(4px);
}

.code-tabs pre:hover .code-copy-btn,
.code-copy-btn:focus-visible { opacity: 1; }

.code-copy-btn:hover {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

.code-copy-btn.is-copied {
  opacity: 1;
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

/* ── Syntax token colors (highlight.js) ── */
/* Light mode */
html[data-theme='light'] .hljs-tag,
html[data-theme='light'] .hljs-name        { color: #116329; }
html[data-theme='light'] .hljs-attr         { color: #0550ae; }
html[data-theme='light'] .hljs-string       { color: #0a3069; }
html[data-theme='light'] .hljs-keyword      { color: #cf222e; }
html[data-theme='light'] .hljs-built_in     { color: #8250df; }
html[data-theme='light'] .hljs-type         { color: #953800; }
html[data-theme='light'] .hljs-number       { color: #0550ae; }
html[data-theme='light'] .hljs-comment      { color: #6e7781; font-style: italic; }
html[data-theme='light'] .hljs-punctuation  { color: #24292f; }
html[data-theme='light'] .hljs-title        { color: #8250df; }
html[data-theme='light'] .hljs-variable     { color: #953800; }
html[data-theme='light'] .hljs-literal      { color: #0550ae; }

/* Dark mode */
html[data-theme='dark'] .hljs-tag,
html[data-theme='dark'] .hljs-name         { color: #7ee787; }
html[data-theme='dark'] .hljs-attr          { color: #79c0ff; }
html[data-theme='dark'] .hljs-string        { color: #a5d6ff; }
html[data-theme='dark'] .hljs-keyword       { color: #ff7b72; }
html[data-theme='dark'] .hljs-built_in      { color: #d2a8ff; }
html[data-theme='dark'] .hljs-type          { color: #ffa657; }
html[data-theme='dark'] .hljs-number        { color: #79c0ff; }
html[data-theme='dark'] .hljs-comment       { color: #8b949e; font-style: italic; }
html[data-theme='dark'] .hljs-punctuation   { color: #e6edf3; }
html[data-theme='dark'] .hljs-title         { color: #d2a8ff; }
html[data-theme='dark'] .hljs-variable      { color: #ffa657; }
html[data-theme='dark'] .hljs-literal       { color: #79c0ff; }

/* ── TOC (right sidebar) ── */
.toc-list { list-style: none; margin: 0; padding: .4rem; }
.toc-item { margin: .05rem 0; }

.toc-item a {
  display: block;
  padding: .28rem .7rem;
  border-radius: var(--radius-sm);
  font-size: .8rem;
  color: var(--muted);
  border-left: 2px solid transparent;
  transition: color var(--transition), background var(--transition),
              border-color var(--transition);
}

.toc-item a:hover {
  color: var(--text);
  background: var(--surface-2);
  text-decoration: none;
}

.toc-item.is-active a {
  color: var(--accent);
  border-left-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, transparent);
}

.toc-item--h3 { padding-left: .75rem; }

/* ── 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;
}

/* ── Responsive ── */
@media (max-width: 1120px) {
  .docs-layout {
    grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
    grid-template-areas: "left main";
  }
  .docs-sidebar--right { display: none; }
}

@media (max-width: 700px) {
  :root { --sidebar-w: 100%; }
  .docs-layout {
    grid-template-columns: 1fr;
    grid-template-areas: "main";
  }
  .docs-sidebar--left { display: none; }
  .site-main { padding-inline: 1rem; }
  .spec-nav__label { display: none; }
}

/* ================================================================
   SPEC BADGE  (reused in sidebar header + spec index page)
   ================================================================ */

.spec-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .05em;
  padding: .2rem .55rem;
  border-radius: var(--radius-sm);
  background: var(--spec-color, var(--accent));
  color: #fff;
  user-select: none;
  flex-shrink: 0;
}

.spec-badge--sm { font-size: .58rem; padding: .15rem .45rem; }

/* Large badge on spec index page */
.spec-badge--lg {
  font-size: .85rem;
  padding: .35rem 1rem;
  border-radius: var(--radius);
}

/* ================================================================
   BREADCRUMB
   ================================================================ */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .3rem .4rem;
  font-size: .775rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--text); text-decoration: none; }
.breadcrumb span[aria-current] { color: var(--text); font-weight: 500; }

/* ================================================================
   SPEC INDEX PAGE
   ================================================================ */

.spec-index-page { padding-top: 1.5rem; }

.spec-index-header {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.spec-index-header__text h1 {
  margin: 0 0 .35rem;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -.035em;
}

.spec-index-header__text p {
  margin: 0 0 .6rem;
  color: var(--muted);
  font-size: .9375rem;
  max-width: 520px;
}

.spec-count {
  font-size: .8rem;
  color: var(--muted);
}

.spec-count strong { color: var(--text); }

/* ── Element grid ── */
.element-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: .75rem;
}

.element-card {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: .85rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  text-decoration: none;
  transition: border-color var(--transition), box-shadow var(--transition),
              background var(--transition);
}

.element-card:hover {
  border-color: var(--spec-color, var(--accent));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--spec-color, var(--accent)) 10%, transparent);
  background: var(--bg);
  text-decoration: none;
}

.element-card__id {
  font-size: .8rem;
  font-weight: 600;
  color: var(--spec-color, var(--accent));
  font-family: 'JetBrains Mono', monospace;
}

.element-card__title {
  font-size: .85rem;
  font-weight: 500;
  color: var(--text);
}

.element-card__desc {
  margin: 0;
  font-size: .775rem;
  color: var(--muted);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Empty state ── */
.spec-empty {
  padding: 3rem 1rem;
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

/* ================================================================
   HOME PAGE – spec cards
   ================================================================ */

.home-specs {
  width: min(660px, 100%);
  margin-top: 2.5rem;
}

.home-specs__label {
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: .75rem;
  text-align: left;
}

.home-specs__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .6rem;
}

.home-spec-card {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  text-decoration: none;
  transition: border-color var(--transition), background var(--transition),
              box-shadow var(--transition);
}

.home-spec-card:hover {
  border-color: var(--spec-color, var(--accent));
  background: var(--bg);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

.home-spec-card__text { min-width: 0; }

.home-spec-card__name {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.home-spec-card__count {
  display: block;
  font-size: .75rem;
  color: var(--muted);
  margin-top: .1rem;
}