:root {
  --ink: #1a1c1e;
  --ink-soft: #5a6160;
  --ink-faint: #8a908e;
  --paper: #f7f6f3;
  --panel: #ffffff;
  --line: #ddd9d1;
  --accent: #14504a;
  --accent-soft: #e6efed;
  --amber: #8a5a12;
  --amber-soft: #fbf3e2;
  --slate: #3d4a55;
  --slate-soft: #eef1f3;
  --red: #8b2f22;
  --red-soft: #fbecea;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
  --sans: "Segoe UI", ui-sans-serif, system-ui, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --radius: 6px;
  --max: 920px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover { color: #0e3a36; }

code, .curie, .uri { font-family: var(--mono); font-size: 0.92em; }

/* ---------- header ---------- */

.topbar {
  background: var(--accent);
  color: #f4f7f6;
  padding: 22px 28px;
}

.topbar-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

.brand-text { min-width: 0; flex: 1; }

.snail {
  width: 78px;
  height: 78px;
  object-fit: contain;
  flex: none;
  margin-left: auto;
  margin-top: -2px;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.35));
}

.logo {
  width: 54px;
  height: 25px;
  flex: none;
  margin-top: 4px;
  color: currentColor;
}

.brand-text h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.brand-text p {
  margin: 4px 0 0;
  font-size: 0.85rem;
  opacity: 0.78;
}

/* ---------- intro ---------- */

.intro {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 28px 8px;
}

.intro .lede {
  font-size: 1.05rem;
  color: var(--ink-soft);
  max-width: 62ch;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.meta strong { color: var(--ink); font-weight: 600; }

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  background: var(--slate-soft);
  color: var(--slate);
  border: 1px solid var(--line);
}

.chip b { font-weight: 650; }

/* ---------- toolbar ---------- */

.toolbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
  padding: 12px 28px;
}

.toolbar-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

#q {
  flex: 1 1 220px;
  min-width: 180px;
  font: inherit;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
#q:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.filters button {
  font: inherit;
  font-size: 0.82rem;
  padding: 6px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink-soft);
  cursor: pointer;
}
.filters button:hover { border-color: var(--accent); color: var(--accent); }
.filters button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---------- layout ---------- */

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 8px 28px 64px;
}

.toc {
  margin: 24px 0 8px;
  padding: 16px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.toc h2 {
  margin: 0 0 10px;
  font-size: 0.95rem;
  font-weight: 650;
}

.toc-groups { display: grid; gap: 12px; }

.toc-group h3 {
  margin: 0 0 6px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-faint);
  font-weight: 650;
}

.toc-links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.88rem;
}

.toc-links a { font-family: var(--mono); font-size: 0.82rem; }

.section-title {
  margin: 36px 0 12px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--ink);
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 600;
}

/* ---------- term card ---------- */

.term {
  margin: 0 0 14px;
  padding: 14px 16px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  scroll-margin-top: 72px;
}

.term:target {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.term-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  margin-bottom: 10px;
}

.term-head h3 {
  margin: 0;
  font-size: 1.05rem;
  font-family: var(--mono);
  font-weight: 650;
}

.term-head .label {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.badge {
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid transparent;
}
.badge.documented { background: var(--accent-soft); color: var(--accent); }
.badge.draft { background: var(--amber-soft); color: var(--amber); }
.badge.label-only { background: var(--slate-soft); color: var(--slate); }
.badge.proposed { background: var(--red-soft); color: var(--red); }

.term-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.term-table th,
.term-table td {
  text-align: left;
  vertical-align: top;
  padding: 6px 0;
  border-top: 1px solid #eeeae3;
}

.term-table th {
  width: 7.5rem;
  color: var(--ink-faint);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding-right: 12px;
}

.term-table .placeholder {
  color: var(--ink-faint);
  font-style: italic;
}

.example-row {
  display: block;
}
.example-row + .example-row { margin-top: 3px; }

.example-usage {
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--ink-faint);
  text-decoration: none;
  border-bottom: 1px dotted var(--line);
  white-space: nowrap;
}
.example-usage:hover { color: var(--accent); border-bottom-color: var(--accent); }

.term.hidden { display: none; }

.empty {
  margin: 40px 0;
  color: var(--ink-soft);
  text-align: center;
}

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px 40px;
  font-size: 0.82rem;
  color: var(--ink-faint);
}

footer code { font-size: 0.9em; }

@media (max-width: 640px) {
  .topbar, .intro, .toolbar, main, footer { padding-left: 16px; padding-right: 16px; }
  .snail { width: 56px; height: 56px; }
  .term-table th { display: block; width: auto; padding-bottom: 0; border: 0; }
  .term-table td { display: block; border-top: 0; padding-top: 2px; padding-bottom: 10px; }
}