:root {
  color-scheme: light dark;
  --bg: #f7f7f5;
  --panel: #ffffff;
  --ink: #17181a;
  --muted: #6b6f76;
  --line: #e3e3df;
  --accent: #1f6feb;
  --constraint: #e08a3c;
  --lexical: #3f9a5f;
  --semantic: #3b7fd4;
  --popularity: #8b5cc7;
  --learned: #cf4f5f;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14151a;
    --panel: #1c1e24;
    --ink: #e9eaec;
    --muted: #9298a3;
    --line: #2b2e36;
    --accent: #6ea8fe;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.5 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, sans-serif;
}

/* Cold-start banner --------------------------------------------------- */
#cold-start {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1rem;
  background: #fff3d4;
  color: #5a4408;
  border-bottom: 1px solid #f0dfae;
  font-size: 0.9rem;
}
@media (prefers-color-scheme: dark) {
  #cold-start { background: #322a12; color: #f0dfae; border-bottom-color: #4a3d18; }
}
#cold-start .dismiss {
  cursor: pointer;
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 0.1rem 0.7rem;
  opacity: 0.7;
  font-size: 0.8rem;
}
#cold-start .dismiss:hover { opacity: 1; }
#cold-start-dismiss:checked ~ #cold-start { display: none; }

/* Masthead ------------------------------------------------------------ */
.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.6rem 2rem 1rem;
  max-width: 1400px;
  margin: 0 auto;
}
.masthead h1 { margin: 0; font-size: 1.5rem; letter-spacing: -0.02em; }
.masthead p { margin: 0.2rem 0 0; color: var(--muted); }
.repo { color: var(--accent); text-decoration: none; font-size: 0.9rem; }
.repo:hover { text-decoration: underline; }

/* Layout -------------------------------------------------------------- */
.layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 1.25rem;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
  align-items: start;
}
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .masthead, .layout { padding-left: 1rem; padding-right: 1rem; }
}

#controls { position: sticky; top: 1rem; display: grid; gap: 1rem; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}
.panel h2 { margin: 0 0 0.7rem; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.09em; color: var(--muted); }
.panel h3 { margin: 0 0 0.5rem; font-size: 0.8rem; color: var(--muted); font-weight: 600; }
.blurb { margin: 0.6rem 0 0; font-size: 0.82rem; color: var(--muted); }

/* Controls ------------------------------------------------------------ */
.segmented { display: grid; gap: 0.3rem; }
.segmented input { position: absolute; opacity: 0; }
.segmented span {
  display: block;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  cursor: pointer;
  font-size: 0.9rem;
}
.segmented input:checked + span { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.segmented input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

textarea {
  width: 100%;
  resize: vertical;
  padding: 0.6rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: transparent;
  color: inherit;
  font: inherit;
}

.slider { display: grid; grid-template-columns: 1fr auto; gap: 0.2rem 0.6rem; margin-bottom: 0.7rem; align-items: center; }
.slider label { grid-column: 1 / -1; font-size: 0.82rem; color: var(--muted); }
.slider input[type=range] { width: 100%; accent-color: var(--accent); }
.slider output { font-family: var(--mono); font-size: 0.82rem; min-width: 3ch; text-align: right; }

.tags { border: 0; padding: 0; margin: 0.9rem 0 0; }
.tags legend { font-size: 0.82rem; color: var(--muted); padding: 0 0 0.4rem; }
.chip input { position: absolute; opacity: 0; }
.chip span {
  display: inline-block;
  margin: 0 0.25rem 0.35rem 0;
  padding: 0.15rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.78rem;
  cursor: pointer;
  color: var(--muted);
}
.chip input:checked + span { background: var(--learned); border-color: var(--learned); color: #fff; }

.ranker { display: flex; align-items: center; gap: 0.5rem; padding: 0.28rem 0; cursor: pointer; }
.ranker .name { font-size: 0.92rem; }
.ranker input { accent-color: var(--accent); }

.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; flex: none; }
.dot-constraint { background: var(--constraint); }
.dot-lexical { background: var(--lexical); }
.dot-semantic { background: var(--semantic); }
.dot-popularity { background: var(--popularity); }
.dot-learned { background: var(--learned); }

/* Results ------------------------------------------------------------- */
#results { display: grid; gap: 1rem; }
.working { display: none; color: var(--muted); font-size: 0.85rem; }
.htmx-request .working, .htmx-request.working { display: block; }

#results-state {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.7rem 1.1rem;
}
.compare-picker { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: var(--muted); }
.compare-picker select {
  font: inherit;
  padding: 0.25rem 0.4rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  max-width: 15rem;
}

.summary { font-size: 0.88rem; color: var(--muted); }
.summary strong { color: var(--ink); }
.ranker-list .dot { margin: 0 0.2rem 0 0.35rem; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-size: 0.82rem; }

table.results {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
table.results th {
  text-align: left;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  font-weight: 600;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--line);
}
table.results td { padding: 0.55rem 0.8rem; border-bottom: 1px solid var(--line); vertical-align: middle; }
table.results tbody tr { cursor: pointer; }
table.results tbody tr:hover { background: color-mix(in srgb, var(--accent) 7%, transparent); }
table.results tbody tr.focused { background: color-mix(in srgb, var(--accent) 12%, transparent); }
table.results tbody tr:last-child td { border-bottom: 0; }
.num { text-align: right; white-space: nowrap; }
.rank { color: var(--muted); font-family: var(--mono); width: 2.5rem; }
.title { font-weight: 600; }
.fields { font-size: 0.75rem; color: var(--muted); margin-top: 0.15rem; }
.bar-cell { width: 32%; min-width: 140px; }
.bar { display: flex; height: 12px; border-radius: 3px; overflow: hidden; background: var(--line); }
.seg { display: block; min-width: 2px; }
.seg-constraint { background: var(--constraint); }
.seg-lexical { background: var(--lexical); }
.seg-semantic { background: var(--semantic); }
.seg-popularity { background: var(--popularity); }
.seg-learned { background: var(--learned); }

.spread { display: inline-block; padding: 0.05rem 0.45rem; border-radius: 999px; font-size: 0.75rem; font-family: var(--mono); }
.s0 { background: color-mix(in srgb, var(--lexical) 18%, transparent); color: var(--lexical); }
.s1 { background: color-mix(in srgb, var(--lexical) 12%, transparent); color: var(--muted); }
.s2 { background: color-mix(in srgb, var(--constraint) 20%, transparent); color: var(--constraint); }
.s3 { background: color-mix(in srgb, var(--learned) 20%, transparent); color: var(--learned); }

/* Explanations -------------------------------------------------------- */
.explain h2 { font-size: 1rem; text-transform: none; letter-spacing: 0; color: var(--ink); }
.quote { margin: 0 0 1rem; color: var(--muted); font-size: 0.88rem; }
.explain-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.2rem; }
.rules, .views { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.35rem; font-size: 0.86rem; }
.rules li::before { content: "pass"; font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.06em; margin-right: 0.5rem; padding: 0.05rem 0.35rem; border-radius: 4px; }
.rules li.pass::before { background: color-mix(in srgb, var(--lexical) 20%, transparent); color: var(--lexical); }
.rules li.fail::before { content: "fail"; background: color-mix(in srgb, var(--learned) 20%, transparent); color: var(--learned); }
.rules li.muted::before { content: none; }
.rules code { font-family: var(--mono); font-size: 0.8rem; }
.rules .value { color: var(--muted); }
.views li { display: flex; align-items: center; gap: 0.5rem; }
.views .name { min-width: 6.5rem; }
.views .place { font-family: var(--mono); min-width: 2.5rem; }

table.diff { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
table.diff th { text-align: left; color: var(--muted); font-weight: 600; font-size: 0.75rem; padding: 0.3rem 0.5rem; border-bottom: 1px solid var(--line); }
table.diff td { padding: 0.35rem 0.5rem; border-bottom: 1px solid var(--line); }
table.diff .up { color: var(--lexical); }
table.diff .down { color: var(--learned); }

details.excluded { font-size: 0.86rem; color: var(--muted); }
details.excluded summary { cursor: pointer; }
details.excluded ul { margin: 0.5rem 0 0; padding-left: 1.2rem; }