:root {
  color-scheme: light;
  --paper: #efe8d9;
  --paper-deep: #e4dbc7;
  --paper-light: #f7f2e6;
  --ink: #26251f;
  --ink-soft: #5d5950;
  --ink-faint: rgba(38, 37, 31, 0.14);
  --vermilion: #b8462f;
  --vermilion-soft: rgba(184, 70, 47, 0.16);
  --moss: #5f6f5e;
  --sepia: #7a5a34;
  --hairline: rgba(67, 61, 50, 0.2);
  --shadow: rgba(61, 50, 33, 0.14);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Baskerville, "Times New Roman", serif;
  --sans: "Avenir Next", Avenir, "Helvetica Neue", system-ui, sans-serif;
  --mono: "SF Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { min-height: 100%; background: var(--paper); }
body {
  margin: 0; min-height: 100vh; color: var(--ink); font-family: var(--serif); font-size: 15px; line-height: 1.45;
  background:
    radial-gradient(circle at 12% 10%, rgba(255,255,255,0.55), transparent 32rem),
    radial-gradient(circle at 85% 80%, rgba(142,117,76,0.09), transparent 36rem),
    repeating-linear-gradient(6deg, rgba(87,76,57,0.016) 0 1px, transparent 1px 8px),
    var(--paper);
}
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--vermilion); outline-offset: 2px; }
code { font-family: var(--mono); font-size: 0.88em; }

.shell { width: min(1480px, 100%); margin: 0 auto; padding: clamp(16px, 3vw, 44px) 16px 40px; }

.masthead { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: clamp(16px, 2vw, 30px); flex-wrap: wrap; }
.eyebrow { display: block; margin-bottom: 4px; color: var(--ink-soft); font-family: var(--sans); font-size: 0.66rem; font-weight: 650; letter-spacing: 0.2em; text-transform: uppercase; }
h1 { margin: 0; font-weight: 500; font-size: clamp(2rem, 4.5vw, 3.4rem); letter-spacing: 0.14em; line-height: 1; }
h1 .kanji { font-weight: 400; color: var(--ink-soft); letter-spacing: 0.06em; }
.deck { max-width: 62ch; margin: 10px 0 0; color: var(--ink-soft); font-style: italic; }
.engine-badge { display: grid; gap: 6px; justify-items: end; }
.badge-label { font-family: var(--sans); font-size: 0.66rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--ink-soft); }
.engine-badge small { font-family: var(--sans); font-size: 0.7rem; color: var(--ink-soft); }

.segmented { display: inline-flex; border: 1px solid var(--hairline); border-radius: 999px; padding: 3px; background: rgba(255,255,255,0.35); }
.segmented button { border: 0; background: transparent; padding: 5px 13px; border-radius: 999px; font-family: var(--sans); font-size: 0.8rem; color: var(--ink-soft); }
.segmented button.is-active { background: var(--ink); color: var(--paper-light); }

.workspace { display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 22px; align-items: start; }
@media (max-width: 960px) { .workspace { grid-template-columns: 1fr; } }

.controls { display: grid; gap: 12px; }
.panel { border: 1px solid var(--hairline); border-radius: 14px; background: rgba(255,255,255,0.38); box-shadow: 0 1px 0 rgba(255,255,255,0.5) inset; }
.panel summary { list-style: none; display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding: 11px 14px; cursor: pointer; }
.panel summary::-webkit-details-marker { display: none; }
.panel-title { font-family: var(--sans); font-size: 0.72rem; font-weight: 650; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-soft); }
.panel-hint { font-size: 0.85rem; color: var(--sepia); font-style: italic; }
.panel-body { padding: 0 14px 14px; display: grid; gap: 12px; }
.panel-body.grid2, .grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 12px; }
.field { display: grid; gap: 5px; }
.field > span { font-family: var(--sans); font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); }
.field.check { grid-template-columns: auto 1fr; align-items: center; gap: 8px; }
.field.check span { text-transform: none; letter-spacing: 0; font-size: 0.85rem; font-family: var(--serif); }
select, input[type="number"] { width: 100%; padding: 7px 9px; border: 1px solid var(--hairline); border-radius: 8px; background: var(--paper-light); }
input[type="range"] { width: 100%; accent-color: var(--vermilion); }
.row { display: flex; gap: 8px; align-items: center; }
.row.between { justify-content: space-between; }
.row select { flex: 1; min-width: 0; }
.subhead { font-family: var(--sans); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--sepia); }
.random-box { border-top: 1px dashed var(--hairline); padding-top: 10px; display: grid; gap: 10px; }
.blurb { margin: 0; font-size: 0.9rem; color: var(--ink-soft); }
.contract-note { margin: 0; font-size: 0.88rem; color: var(--ink-soft); font-style: italic; }
button.ghost { border: 1px solid var(--hairline); background: rgba(255,255,255,0.4); border-radius: 999px; padding: 6px 12px; font-family: var(--sans); font-size: 0.8rem; }
button.ghost:disabled { opacity: 0.45; cursor: default; }
button.primary { border: 0; background: var(--vermilion); color: var(--paper-light); border-radius: 999px; padding: 10px 18px; font-family: var(--sans); font-size: 0.88rem; font-weight: 650; letter-spacing: 0.04em; box-shadow: 0 6px 16px -8px rgba(184,70,47,0.7); }
button.primary:disabled { opacity: 0.5; cursor: default; box-shadow: none; }
.actions { display: flex; gap: 8px; align-items: center; }
.status { margin: 0; font-size: 0.88rem; color: var(--ink-soft); min-height: 1.4em; }
.status.is-error { color: var(--vermilion); }

.canvas-card { border: 1px solid var(--hairline); border-radius: 18px; background: rgba(255,255,255,0.28); padding: 12px; box-shadow: 0 18px 40px -30px var(--shadow); min-width: 0; }
.canvas-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 10px; }
.legend { display: flex; gap: 12px; flex-wrap: wrap; font-family: var(--sans); font-size: 0.7rem; color: var(--ink-soft); }
.legend span { display: inline-flex; align-items: center; gap: 5px; }
.mark { display: inline-block; width: 18px; height: 3px; border-radius: 2px; background: var(--ink); }
.mark.faded { background: rgba(38,37,31,0.25); }
.mark.macro { background: var(--sepia); }
.mark.route { height: 5px; background: var(--vermilion); }
.canvas-wrap { position: relative; aspect-ratio: 16 / 11; border-radius: 12px; overflow: hidden; background: var(--paper-light); box-shadow: 0 0 0 1px var(--hairline) inset; }
@media (max-width: 600px) { .canvas-wrap { aspect-ratio: 4 / 5; } }
.canvas-wrap canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.readout { position: absolute; left: 12px; top: 10px; font-family: var(--sans); font-size: 0.68rem; color: var(--ink-soft); display: grid; gap: 1px; pointer-events: none; }
.readout b { color: var(--ink); font-weight: 600; }
.empty[hidden] { display: none; }
.empty { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; gap: 4px; color: var(--ink-soft); pointer-events: none; }
.playback { display: grid; grid-template-columns: auto 1fr auto auto; gap: 10px; align-items: center; margin-top: 10px; }
.playback output { font-family: var(--mono); font-size: 0.78rem; color: var(--ink-soft); min-width: 5ch; text-align: right; }
.playback .speed { display: flex; align-items: center; gap: 6px; font-family: var(--sans); font-size: 0.68rem; color: var(--ink-soft); width: 130px; }

.compare { margin-top: 30px; }
.compare-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; }
.compare h2 { margin: 0; font-weight: 500; letter-spacing: 0.08em; font-size: 1.4rem; }
.compare-head p { margin: 4px 0 0; color: var(--ink-soft); font-style: italic; }
.algo-picks { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.algo-picks label { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--hairline); border-radius: 999px; padding: 5px 11px 5px 8px; font-family: var(--sans); font-size: 0.78rem; background: rgba(255,255,255,0.35); }
.algo-picks label.exact { border-color: rgba(184,70,47,0.45); }
.algo-picks input { accent-color: var(--vermilion); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.card { border: 1px solid var(--hairline); border-radius: 14px; background: rgba(255,255,255,0.4); padding: 12px; display: grid; gap: 8px; position: relative; }
.card.is-best { border-color: var(--vermilion); box-shadow: 0 0 0 1px var(--vermilion-soft); }
.card.is-detour h3 { color: var(--vermilion); }
.card h3 { margin: 0; font-weight: 500; font-size: 1.05rem; letter-spacing: 0.03em; }
.card .kind { font-family: var(--sans); font-size: 0.62rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-soft); }
.card .kind.exact { color: var(--vermilion); }
.card canvas { width: 100%; aspect-ratio: 4 / 3; border-radius: 8px; background: var(--paper-light); box-shadow: 0 0 0 1px var(--hairline) inset; }
.card .cost { display: flex; align-items: baseline; gap: 8px; }
.card .cost b { font-size: 1.5rem; font-weight: 500; }
.card .cost .gap { font-family: var(--sans); font-size: 0.72rem; color: var(--sepia); }
.card .cost .gap.zero { color: var(--moss); }
.card dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; font-family: var(--sans); font-size: 0.7rem; color: var(--ink-soft); }
.card dt { text-transform: uppercase; letter-spacing: 0.08em; }
.card dd { margin: 0; color: var(--ink); font-family: var(--mono); }
.card .state { font-size: 0.82rem; font-style: italic; color: var(--ink-soft); }
.card .state.bad { color: var(--vermilion); }
.card .replay { justify-self: start; }
.colophon { margin-top: 36px; border-top: 1px solid var(--hairline); padding-top: 12px; color: var(--ink-soft); font-size: 0.8rem; }
.level-control { display: inline-flex; align-items: center; gap: 6px; font-family: var(--sans); font-size: 0.72rem; color: var(--ink-soft); }
.level-control[hidden] { display: none; }
.level-control output { min-width: 11ch; text-align: center; }