/* WarmStart AI: attention explainer. Original design, no external assets. */

:root {
  --bg: #f7f5f1;
  --surface: #fffdfa;
  --ink: #17150f;
  --muted: #6f6a5e;
  --line: #e2dcd1;
  --line-strong: #cfc7b8;
  --accent: #c2410c;
  --accent-soft: #fbeee5;
  --green: #1c7c54;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

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

.top { max-width: 960px; margin: 0 auto; padding: 28px 20px 4px; }
.crumb { margin: 0 0 10px; font-size: 0.85rem; color: var(--muted); }
.crumb a { color: var(--accent); text-decoration: none; }
.crumb a:hover { text-decoration: underline; }
h1 { margin: 0 0 6px; font-size: 1.7rem; letter-spacing: -0.01em; }
.sub { margin: 0; color: var(--muted); max-width: 62ch; }

.wrap { max-width: 960px; margin: 0 auto; padding: 14px 20px 48px; }

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin: 14px 0;
}

.row { display: flex; flex-wrap: wrap; gap: 8px; }
.row + .row { margin-top: 10px; }

button {
  font: inherit;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  padding: 7px 12px;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button[aria-pressed="true"] {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: #8a2c07;
  font-weight: 600;
}

.hint { margin: 10px 0 0; color: var(--muted); font-size: 0.9rem; }
.small { font-size: 0.82rem; color: var(--muted); }

.tokens { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 6px; }
.tok {
  border: 1.5px solid var(--line-strong);
  background: #fff;
  border-radius: 9px;
  padding: 6px 9px;
  font-family: var(--mono);
  font-size: 0.92rem;
  cursor: pointer;
}
.tok[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-soft); font-weight: 700; }
.tok.plain { cursor: default; }

.grid-wrap { overflow-x: auto; margin-top: 12px; }
.grid { display: grid; gap: 2px; width: max-content; }
.cell {
  width: 22px; height: 22px;
  border-radius: 3px;
  background: #f1ede6;
  cursor: pointer;
}
.cell.head { background: #e7e1d6; }
.cell.sel { outline: 2px solid var(--accent); outline-offset: -1px; }
.rowlabel { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); width: 86px; text-align: right; padding-right: 8px; }
.axis { font-size: 0.78rem; color: var(--muted); margin-top: 6px; }

.bars { margin-top: 12px; }
.bar { display: grid; grid-template-columns: minmax(70px, 150px) 1fr auto; gap: 10px; align-items: center; margin: 5px 0; }
.bar .name { font-family: var(--mono); font-size: 0.85rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar .track { background: #f1ede6; border-radius: 5px; height: 14px; overflow: hidden; }
.bar .fill { height: 100%; background: var(--accent); border-radius: 5px; }
.bar .val { font-family: var(--mono); font-size: 0.82rem; color: var(--muted); }

.controls { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; margin-top: 12px; }
.controls label { font-size: 0.85rem; color: var(--muted); display: flex; gap: 8px; align-items: center; }
input[type="range"] { accent-color: var(--accent); width: 180px; }
select { font: inherit; padding: 5px 8px; border-radius: 8px; border: 1px solid var(--line-strong); background: #fff; }

.note { background: var(--accent-soft); border: 1px solid #f0d6c4; border-radius: 10px; padding: 12px 14px; margin-top: 12px; font-size: 0.92rem; }
.legend { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; color: var(--muted); margin-top: 8px; }
.swatch { width: 60px; height: 12px; border-radius: 3px; background: linear-gradient(90deg, #f1ede6, rgba(194, 65, 12, 0.85)); border: 1px solid var(--line); }

.footer { max-width: 960px; margin: 0 auto; padding: 0 20px 40px; color: var(--muted); font-size: 0.85rem; }
.footer p { margin: 6px 0; }

@media (max-width: 620px) {
  .cell { width: 15px; height: 15px; }
  .rowlabel { width: 64px; }
  h1 { font-size: 1.4rem; }
}

/* ---------------------------------------------------------------- arcs view */
.arc-wrap { position: relative; padding-bottom: 130px; }
.arc-wrap .tokens { position: relative; z-index: 2; margin-bottom: 0; }
.arcs { position: absolute; left: 0; top: 0; width: 100%; display: block; z-index: 1; pointer-events: none; }
.arc { fill: none; stroke: var(--accent); stroke-linecap: round; animation: arcin 0.3s ease both; }
.arcdot { fill: var(--accent); animation: arcin 0.3s ease both; }
.arclabel {
  font: 600 12px var(--mono);
  fill: #8a2c07;
  paint-order: stroke;
  stroke: var(--surface);
  stroke-width: 4px;
  stroke-linejoin: round;
}
@keyframes arcin { from { opacity: 0; } to { opacity: 1; } }

.howto {
  background: #f1ede6;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 14px;
}
.howto p { margin: 0; font-size: 0.9rem; color: var(--ink-soft); }

.mixline {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin: 12px 0 0;
}

.advanced { margin-top: 14px; }
.advanced summary { cursor: pointer; font-size: 0.9rem; color: var(--muted); }
.advanced summary:hover { color: var(--accent); }
.colnum { width: auto !important; padding: 0 !important; text-align: center; }

.preset { padding: 3px 8px; font-size: 0.8rem; border-radius: 7px; }

.sentence-line { font-size: 1.05rem; margin: 0 0 10px; }
.sentence-line .focus { color: var(--accent-ink); font-weight: 700; }