/* w3dev specs — registry-first, RFC-inflected static site.
   Structure via hairline borders only. No shadows, gradients, glass, or
   illustrations. One CSS file, passthrough-copied as-is. */

/* ---------------------------------------------------------------------
   Tokens — light is the default palette on bare :root; dark overrides it
   first under prefers-color-scheme (respecting OS setting), then again
   under [data-theme="dark"] so the manual toggle always wins.
   --------------------------------------------------------------------- */
:root {
  color-scheme: light dark;

  --bg: #fcfcfb;
  --bg-raised: #f6f5f3;
  --text: #141414;
  --muted: #6b6b66;
  --border: #dedcd7;
  --border-strong: #c7c5bf;
  --code-bg: #f1f0ec;

  --accent: #2451b8;
  --accent-text: #ffffff;
  --accent-soft: rgba(36, 81, 184, 0.1);
  --accent-soft-strong: rgba(36, 81, 184, 0.16);

  --badge-official-bg: #16213f;
  --badge-official-text: #f4f6fb;
  --amber: #a3690a;

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

  --container-wide: 1360px;
  --container-narrow: 70ch;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101114;
    --bg-raised: #17181c;
    --text: #e7e7e5;
    --muted: #98988f;
    --border: #2b2c31;
    --border-strong: #3a3b41;
    --code-bg: #17181c;

    --accent: #7fa1e8;
    --accent-text: #0c1220;
    --accent-soft: rgba(127, 161, 232, 0.14);
    --accent-soft-strong: rgba(127, 161, 232, 0.22);

    --badge-official-bg: #7fa1e8;
    --badge-official-text: #0c1220;
    --amber: #d0a24a;
  }
}

:root[data-theme="dark"] {
  --bg: #101114;
  --bg-raised: #17181c;
  --text: #e7e7e5;
  --muted: #98988f;
  --border: #2b2c31;
  --border-strong: #3a3b41;
  --code-bg: #17181c;

  --accent: #7fa1e8;
  --accent-text: #0c1220;
  --accent-soft: rgba(127, 161, 232, 0.14);
  --accent-soft-strong: rgba(127, 161, 232, 0.22);

  --badge-official-bg: #7fa1e8;
  --badge-official-text: #0c1220;
  --amber: #d0a24a;
}

/* ---------------------------------------------------------------------
   Reset & base
   --------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.55;
  overflow-x: hidden;
}
h1, h2, h3, p, table, figure { margin: 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
img, svg { max-width: 100%; }
.mono { font-family: var(--font-mono); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------------
   Header
   --------------------------------------------------------------------- */
.site-header {
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0.85rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.wordmark {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
  letter-spacing: -0.01em;
}
.wordmark:hover { text-decoration: none; color: var(--accent); }
.header-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.header-links a {
  color: var(--muted);
  font-size: 0.85rem;
}
.header-links a:hover { color: var(--accent); }
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: none;
  color: var(--muted);
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.theme-toggle .icon {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.3;
  stroke-linecap: round;
}
.theme-toggle .icon-moon { display: none; fill: currentColor; stroke: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: inline-flex; }
}
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: inline-flex; }

/* ---------------------------------------------------------------------
   Main containers
   --------------------------------------------------------------------- */
.site-main { display: block; }
body.page-home .site-main {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 2rem 3rem;
}
body.page-spec .site-main {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 1.25rem 4rem;
}

/* ---------------------------------------------------------------------
   Identity strip
   --------------------------------------------------------------------- */
.identity-strip {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
}
.site-name {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.tagline {
  margin-top: 0.5rem;
  font-size: 1rem;
  color: var(--text);
  max-width: 46rem;
}
.subline {
  margin-top: 0.3rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.live-count {
  margin-top: 0.9rem;
  font-size: 0.8rem;
  color: var(--muted);
}

/* ---------------------------------------------------------------------
   Controls bar
   --------------------------------------------------------------------- */
.controls-bar {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.controls-row-top {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.search-input {
  flex: 1 1 20rem;
  min-width: 0;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg);
  color: var(--text);
}
.search-input:focus-visible { border-color: var(--accent); }
.search-input::placeholder { color: var(--muted); }

.control-sort {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
}
.control-sort select {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg);
  color: var(--text);
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.chip {
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: none;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.2;
}
.chip:hover { border-color: var(--border-strong); color: var(--text); }
.chip.is-active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}
.chip-tag { font-family: var(--font-mono); font-size: 0.74rem; }

/* ---------------------------------------------------------------------
   Registry table
   --------------------------------------------------------------------- */
.registry-table-wrap { padding: 1.25rem 0 3rem; }
.results-empty {
  padding: 2.5rem 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}
.registry-table {
  display: block;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.table-row {
  display: grid;
  grid-template-columns: minmax(220px, 2.3fr) 108px 88px minmax(150px, 1.4fr) 92px 84px;
  gap: 0.5rem;
  align-items: center;
  border-bottom: 1px solid var(--border);
}
.table-row:last-child { border-bottom: none; }
.table-row[hidden] { display: none; }
.table-head {
  background: var(--bg-raised);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 600;
}
.table-head .cell { padding: 0.65rem 0.6rem; }
.table-body .table-row {
  color: inherit;
  background: var(--bg);
}
.table-body .table-row:hover { background: var(--bg-raised); cursor: pointer; }
.table-body .table-row:focus-visible { outline-offset: -2px; }

.cell { padding: 0.7rem 0.6rem; min-width: 0; }
.cell-name { padding-left: 0.9rem; }
.cell-links { padding-right: 0.9rem; display: flex; gap: 0.6rem; align-items: center; }

.name-stack { display: flex; flex-direction: column; gap: 0.15rem; min-width: 0; }
.row-title {
  font-weight: 600;
  color: var(--text);
  font-size: 0.92rem;
}
.row-title:hover { color: var(--accent); text-decoration: none; }
.row-meta {
  font-size: 0.74rem;
  color: var(--muted);
}
.row-summary {
  font-size: 0.8rem;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cell-version { font-size: 0.85rem; }
.cell-tags { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.cell-updated { font-size: 0.8rem; color: var(--muted); }
.cell-updated time { cursor: default; }

.pill {
  display: inline-block;
  padding: 0.12rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--muted);
  white-space: nowrap;
}
.pill-more { border-style: dotted; }

.raw-link { font-size: 0.78rem; }
.ext-link { font-size: 0.85rem; }

/* ---------------------------------------------------------------------
   Status badges
   official    = solid near-black fill, accent-tinted
   unofficial  = gray outline
   draft       = dashed amber outline
   adopted     = solid accent outline
   deprecated  = gray outline, strikethrough label
   --------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.18rem 0.55rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
  background: none;
}
.badge-official {
  background: var(--badge-official-bg);
  border-color: var(--badge-official-bg);
  color: var(--badge-official-text);
}
.badge-unofficial {
  border-color: var(--border-strong);
  color: var(--muted);
}
.badge-draft {
  border-style: dashed;
  border-color: var(--amber);
  color: var(--amber);
}
.badge-adopted {
  border-color: var(--accent);
  color: var(--accent);
}
.badge-deprecated {
  border-color: var(--border-strong);
  color: var(--muted);
  text-decoration: line-through;
}

/* ---------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------- */
.site-footer { border-top: 1px solid var(--border); }
.footer-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 1.5rem 2rem 2.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.5rem;
}
.footer-status { color: var(--muted); font-size: 0.78rem; }
.footer-links { display: flex; gap: 1rem; margin-left: auto; }
.footer-links a { font-size: 0.8rem; color: var(--muted); }
.footer-links a:hover { color: var(--accent); }
.footer-convention {
  flex-basis: 100%;
  font-size: 0.72rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
  margin-top: 0.25rem;
}

/* ---------------------------------------------------------------------
   Spec detail page
   --------------------------------------------------------------------- */
.spec-detail { padding: 2.5rem 0 4rem; }
.spec-detail-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.9rem;
}
.spec-number { color: var(--muted); font-size: 0.8rem; }
.spec-title { font-size: 1.7rem; font-weight: 700; letter-spacing: -0.02em; }
.spec-summary { margin-top: 0.6rem; color: var(--muted); font-size: 1rem; }

.spec-actions {
  margin-top: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.copy-raw-btn {
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  background: var(--bg-raised);
  color: var(--text);
  font-size: 0.82rem;
}
.copy-raw-btn:hover { border-color: var(--accent); color: var(--accent); }
.copy-raw-btn.is-copied { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.spec-actions .raw-link { color: var(--muted); font-size: 0.8rem; }
.spec-actions .raw-link:hover { color: var(--accent); }

.facts-table {
  margin-top: 1.5rem;
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.facts-table th, .facts-table td {
  text-align: left;
  padding: 0.5rem 0.75rem 0.5rem 0;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.facts-table th {
  color: var(--muted);
  font-weight: 600;
  width: 9rem;
  white-space: nowrap;
  font-size: 0.78rem;
}
.facts-table .pill { margin: 0 0.25rem 0.25rem 0; }

.spec-body {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.spec-body h2 { font-size: 1.2rem; margin-top: 2rem; margin-bottom: 0.75rem; letter-spacing: -0.01em; }
.spec-body h2:first-child { margin-top: 0; }
.spec-body h3 { font-size: 1.02rem; margin-top: 1.5rem; margin-bottom: 0.6rem; }
.spec-body p { margin: 0.9rem 0; }
.spec-body ul, .spec-body ol { margin: 0.9rem 0; padding-left: 1.4rem; }
.spec-body li { margin: 0.35rem 0; }
.spec-body code {
  background: var(--code-bg);
  border-radius: 4px;
  padding: 0.15em 0.4em;
  font-size: 0.88em;
  font-family: var(--font-mono);
}
.spec-body pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  overflow-x: auto;
}
.spec-body pre code { padding: 0; background: none; }
.spec-body strong { font-weight: 600; }
.spec-body a { text-decoration: underline; text-underline-offset: 2px; }

.raw-link-footer { margin-top: 2.5rem; font-size: 0.85rem; }

/* ---------------------------------------------------------------------
   Responsive — table becomes stacked cards below 720px
   --------------------------------------------------------------------- */
@media (max-width: 900px) {
  .header-inner, .footer-inner { padding-left: 1.25rem; padding-right: 1.25rem; }
  body.page-home .site-main { padding-left: 1.25rem; padding-right: 1.25rem; }
}

@media (max-width: 720px) {
  .header-links { gap: 0.85rem; }
  .header-links a:not(.theme-toggle) { display: none; }
  .identity-strip { padding-top: 1.75rem; }
  .site-name { font-size: 1.35rem; }

  .table-row {
    display: block;
    padding: 0.85rem 0.9rem;
  }
  .table-row.table-head { display: none; }
  .cell {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem;
    padding: 0.3rem 0;
  }
  .cell-name { flex-direction: column; align-items: flex-start; padding-left: 0; }
  .cell::before {
    content: attr(data-label);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
    flex-shrink: 0;
  }
  .cell-name::before { display: none; }
  .cell-tags { justify-content: flex-start; }
  .cell-links { padding-right: 0; justify-content: flex-start; gap: 1rem; }
  .row-summary { white-space: normal; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-links { margin-left: 0; }
}