/*
  Design note (not decoration — read this before changing a token): the page borrows the
  vernacular of a Hong Kong building directory board — a filed record with a coloured edge tab
  for its status, brass-on-green signage colours, tabular numerals for keys and coordinates.
  No card shadows, no pill badges, no rounded-corner kit: a record is filed, not floated.
*/

:root {
  --paper: #eef0e9;
  --paper-raised: #f7f8f3;
  --ink: #16241f;
  --ink-soft: #46564e;
  --rule: #c9d0c3;
  --green: #1f5c46;
  --green-deep: #123c2d;
  --brass: #b98a3d;
  --brass-deep: #8f6a2c;
  --brick: #8a3324;
  --amber: #9c6b12;

  --radius: 3px;
  --gutter: 16px;
  --measure: 34rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #10201b;
    --paper-raised: #16281f;
    --ink: #eef0e9;
    --ink-soft: #a9b6ac;
    --rule: #2c4137;
    --green: #7bbf9e;
    --green-deep: #a9dcc0;
    --brass: #d4ab63;
    --brass-deep: #e6c383;
    --brick: #d97a63;
    --amber: #e0b25a;
  }
}

:root[data-theme="dark"] {
  --paper: #10201b;
  --paper-raised: #16281f;
  --ink: #eef0e9;
  --ink-soft: #a9b6ac;
  --rule: #2c4137;
  --green: #7bbf9e;
  --green-deep: #a9dcc0;
  --brass: #d4ab63;
  --brass-deep: #e6c383;
  --brick: #d97a63;
  --amber: #e0b25a;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    "PingFang HK",
    "PingFang SC",
    "Noto Sans HK",
    "Microsoft JhengHei",
    "Hiragino Sans GB",
    sans-serif;
  font-size: 16px;
  line-height: 1.55;
  overflow-x: hidden;
}

main,
.site-header,
.site-footer {
  max-width: 40rem;
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

a {
  color: var(--green-deep);
}

a:focus-visible,
button:focus-visible,
textarea:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

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

.site-header {
  padding-top: 2rem;
  padding-bottom: 1.1rem;
  border-bottom: 3px solid var(--green);
}

.site-header h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--green-deep);
}

.tagline {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
  max-width: var(--measure);
}

/* ---- form ---- */

.resolve-form {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.resolve-form label {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.resolve-form textarea {
  font: inherit;
  color: var(--ink);
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 0.7rem 0.8rem;
  resize: vertical;
  min-height: 4.5rem;
}

.resolve-form button {
  align-self: flex-start;
  font: inherit;
  font-weight: 600;
  color: var(--paper-raised);
  background: var(--green);
  border: 1px solid var(--green-deep);
  border-radius: var(--radius);
  padding: 0.55rem 1.4rem;
  cursor: pointer;
}

.resolve-form button:hover {
  background: var(--green-deep);
}

/* ---- examples ---- */

.examples {
  margin-top: 1.1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--rule);
}

.examples-label {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-right: 0.2rem;
}

.example-btn {
  font: inherit;
  font-size: 0.82rem;
  color: var(--ink);
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 0.3rem 0.6rem;
  cursor: pointer;
}

.example-btn:hover {
  border-color: var(--brass);
  color: var(--brass-deep);
}

/* ---- result card: a filed record, coloured tab on its edge for state ---- */

#result:empty {
  display: none;
}

.result-card {
  margin-top: 1.2rem;
  padding: 1rem 1.1rem;
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-left: 5px solid var(--ink-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.result-card.state-matched,
.result-card.state-matched_partial {
  border-left-color: var(--green);
}

.result-card.state-ambiguous,
.result-card.state-under_specified,
.result-card.state-held_back {
  border-left-color: var(--amber);
}

.result-card.state-not_found,
.result-card.state-out_of_scope {
  border-left-color: var(--brick);
}

.result-card .hint {
  margin: 0;
  color: var(--ink-soft);
}

.result-headline h2 {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.4;
}

.result-headline .zh {
  margin: 0.15rem 0 0;
  color: var(--ink-soft);
}

.notice {
  margin: 0.7rem 0 0;
  color: var(--ink-soft);
}

.tags {
  margin: 0.5rem 0 0;
  font-size: 0.9rem;
  color: var(--brick);
}

/* ---- confidence bar ---- */

.confidence-bar {
  position: relative;
  margin-top: 0.8rem;
  height: 0.55rem;
  background: var(--rule);
  border-radius: 999px;
  overflow: hidden;
}

.confidence-fill {
  height: 100%;
  background: var(--green);
}

.confidence-label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
  color: var(--ink-soft);
}

/* ---- keys ---- */

dl.keys {
  margin: 0.8rem 0 0;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 0.8rem;
  row-gap: 0.25rem;
  font-size: 0.92rem;
}

dl.keys dt {
  color: var(--ink-soft);
}

dl.keys dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
}

dl.keys code,
.result-card code {
  font-family: ui-monospace, "SF Mono", "Cascadia Mono", "Noto Sans Mono CJK HK", monospace;
  font-size: 0.88em;
}

.muted {
  color: var(--ink-soft);
  font-size: 0.85em;
}

/* ---- map ---- */

.map {
  margin-top: 0.9rem;
  height: 220px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper);
}

/* ---- why ---- */

details.why {
  margin-top: 0.9rem;
  border-top: 1px solid var(--rule);
  padding-top: 0.7rem;
}

details.why summary {
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--green-deep);
}

details.why h3 {
  margin: 0.8rem 0 0.3rem;
  font-size: 0.82rem;
  color: var(--ink-soft);
  font-weight: 600;
}

dl.components,
dl.numbers {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 0.8rem;
  row-gap: 0.2rem;
  font-size: 0.88rem;
}

dl.components dt,
dl.numbers dt {
  color: var(--ink-soft);
}

dl.components dd,
dl.numbers dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
}

table.posterior {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

table.posterior th {
  text-align: left;
  font-weight: 600;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
  padding: 0.2rem 0.4rem 0.2rem 0;
}

table.posterior td {
  border-bottom: 1px solid var(--rule);
  padding: 0.25rem 0.4rem 0.25rem 0;
  font-variant-numeric: tabular-nums;
}

ol.explanation {
  margin: 0;
  padding-left: 1.2rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* ---- footer ---- */

.site-footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--rule);
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.site-footer p {
  margin: 0.3rem 0;
}

.privacy-note {
  color: var(--ink-soft);
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}