/* The Sort-Off — palette and layout from the design source. */

:root {
  --paper: #f7f1e3;
  --card: #fdfbf4;
  --sunk: #efe7d4;
  --line: #e3d9c2;
  --line-strong: #ddd2b8;
  --ink: #22293a;
  --ink-soft: #4a4436;
  --muted: #8a8065;
  --muted-strong: #6b6350;
  --blue: #1d3a6b;
  --rust: #a8402f;

  --display: 'Bricolage Grotesque', ui-sans-serif, system-ui, sans-serif;
  --body: 'Space Grotesk', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --r-pill: 999px;
  --r-card: 12px;
}

*, *::before, *::after { box-sizing: border-box; }

/* Any author rule that sets `display` outbeats the UA sheet's [hidden] rule, so
   the panels and log boxes below would stay visible while empty. Pin it. */
[hidden] { display: none !important; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 14px;
  line-height: 1.5;
}

h1, p { margin: 0; }

a { color: var(--blue); }
a:hover { color: var(--rust); }

button, select, input, output { font-family: inherit; }

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

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.app {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

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

.bar {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 24px;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

.bar-spacer { flex: 1; }

.brand h1 {
  font-family: var(--display);
  font-weight: 800;
  font-size: 24px;
  letter-spacing: -0.5px;
  line-height: 1;
}

.brand p {
  font-size: 11px;
  color: var(--muted);
  margin-top: 3px;
}

.field { display: flex; align-items: center; gap: 8px; }

.field-label {
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--muted);
}

#size { width: 130px; accent-color: var(--blue); }

#size-label {
  min-width: 52px;
  text-align: right;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

/* ---------- segmented controls ---------- */

.seg {
  display: flex;
  gap: 4px;
  background: var(--sunk);
  border-radius: var(--r-pill);
  padding: 4px;
}

.seg-btn {
  padding: 6px 16px;
  border-radius: var(--r-pill);
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font: 600 13px var(--body);
  cursor: pointer;
}

.seg-sm .seg-btn { padding: 4px 10px; font-size: 12px; }

.seg-btn[aria-selected="true"],
.seg-btn[aria-pressed="true"] {
  background: var(--blue);
  color: var(--paper);
}

/* ---------- buttons ---------- */

.btn {
  padding: 9px 18px;
  border-radius: var(--r-pill);
  font: 600 13px/1 var(--body);
  cursor: pointer;
  background: transparent;
}

.btn-lg { padding: 10px 24px; font: 700 14px var(--body); }
.btn-solid { border: 1px solid var(--blue); background: var(--blue); color: var(--paper); min-width: 80px; }
.btn-outline { border: 1px solid var(--blue); color: var(--blue); }
.btn-quiet { border: 1px solid var(--line-strong); color: var(--ink-soft); }
.btn-rust { border: 1px solid var(--rust); color: var(--rust); }

/* ---------- panels ---------- */

.panel {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 24px;
  align-items: center;
}

.chips-list { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-strong);
  background: var(--card);
  color: var(--ink-soft);
  font: 500 13px var(--body);
  cursor: pointer;
}

.chip[aria-pressed="true"] {
  border-color: var(--blue);
  background: var(--blue);
  color: var(--paper);
}

.chip[aria-pressed="true"] .dot { opacity: 0.5; }

.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  flex: none;
  display: inline-block;
}

.dot-real { background: var(--blue); }
.dot-fun { background: var(--rust); }

.legend {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--muted);
  margin-left: 6px;
}

.legend .dot-fun { margin-left: 6px; }

/* ---------- watch ---------- */

.stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 0 24px 20px;
  flex: 1;
}

.title-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.title-group {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  min-width: 0;
}

.algo-name {
  font-family: var(--display);
  font-weight: 800;
  font-size: 32px;
  letter-spacing: -0.5px;
  line-height: 1.1;
}

.quip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: none;
  border: none;
  padding: 0;
  color: var(--muted);
  font: 400 15px var(--body);
  cursor: pointer;
  text-align: left;
}

.chev {
  display: inline-flex;
  flex: none;
  color: var(--rust);
  transform: rotate(-90deg);
  transition: transform 0.18s;
}

.quip[aria-expanded="true"] .chev { transform: rotate(0deg); }

@media (prefers-reduced-motion: reduce) {
  .chev { transition: none; }
}

.controls { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.expl {
  max-width: 780px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 14px 18px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
  text-wrap: pretty;
}

.note {
  font-size: 12px;
  color: var(--muted-strong);
  line-height: 1.5;
  text-wrap: pretty;
}

.race-bar .note { color: var(--muted); }

/* ---------- stage ---------- */

.stage { position: relative; overflow: hidden; }

.stage-solo {
  height: min(62vh, 680px);
  min-height: 340px;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: var(--card);
}

.stage-lane { height: 30vh; min-height: 170px; }

.stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

.log {
  position: absolute;
  top: 12px; left: 12px;
  max-width: 480px;
  max-height: 80%;
  overflow-y: auto;
  display: flex;
  flex-direction: column-reverse;
  background: rgba(34, 41, 58, 0.94);
  color: #f0ead6;
  border-radius: var(--r-card);
}

.log-lane { top: 8px; left: 8px; right: 8px; max-width: none; border-radius: 10px; }

.log pre {
  margin: 0;
  padding: 14px 18px;
  font: 12.5px/1.75 var(--mono);
  white-space: pre-wrap;
}

.log-lane pre { padding: 10px 12px; font: 11px/1.6 var(--mono); }

.pill {
  position: absolute;
  border-radius: var(--r-pill);
  font-size: 13px;
  padding: 6px 14px;
}

.pill-ink { background: var(--ink); color: var(--paper); }

.pill-paper {
  background: rgba(247, 241, 227, 0.92);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 12px;
  padding: 4px 12px;
  font-variant-numeric: tabular-nums;
}

.pill-tl { top: 12px; left: 12px; }
.pill-bl { bottom: 10px; left: 12px; }

.stage-lane .pill { font-size: 11px; padding: 4px 10px; bottom: 8px; left: 8px; }

/* ---------- race ---------- */

.race-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 24px;
  flex-wrap: wrap;
}

/* Always 1, 2 or 4 columns. `auto-fit` orphaned the fourth lane into a 3+1 row
   at common laptop widths, which reads as broken for a four-lane race. */
.lane-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: 0 24px 20px;
  flex: 1;
}

@media (min-width: 700px) {
  .lane-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1500px) {
  .lane-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.lane {
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  background: var(--card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.lane-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-bottom: 1px solid var(--sunk);
}

.lane-select {
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink);
  font: 600 13px var(--body);
  cursor: pointer;
  max-width: 100%;
}

.badge {
  background: var(--blue);
  color: var(--paper);
  padding: 3px 10px;
  border-radius: var(--r-pill);
  font-size: 11px;
  font-weight: 700;
}

.lane-status {
  padding: 8px 12px;
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  border-top: 1px solid var(--sunk);
}

/* ---------- small screens ---------- */

@media (max-width: 720px) {
  .bar { gap: 12px; padding: 12px 16px; }
  .bar-spacer { display: none; }
  .chips { padding: 12px 16px; }
  .stack { padding: 0 16px 16px; }
  .race-bar { padding: 12px 16px; }
  .lane-grid { padding: 0 16px 16px; }
  .algo-name { font-size: 26px; }
  .controls { width: 100%; }
}