/* Layout: one-screen drafting table. A title row, a framed plan sheet that holds the square maze,
   then a control strip. Light = pale vellum with navy ink. Dark = blueprint. */
:root {
  --paper: #E6ECF1;
  --paper-2: #D6E0E9;
  --veil: rgba(230, 236, 241, 0.88);
  --ink: #16315A;
  --ink-soft: #4B6482;
  --grid: #C9D5E0;
  --grid-major: #AEBFCF;
  --accent: #E4570F;
  --player-edge: #16315A;
  --ok: #0E8A52;
  --goal: #0A7FA6;
  --font-display: 'Barlow Condensed', 'Arial Narrow', 'Helvetica Neue', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0E2444;
    --paper-2: #16335E;
    --veil: rgba(14, 36, 68, 0.88);
    --ink: #A9CBF3;
    --ink-soft: #7FA2CE;
    --grid: #17335E;
    --grid-major: #234A82;
    --accent: #FFB020;
    --player-edge: #0E2444;
    --ok: #4BE39A;
    --goal: #6FD6FF;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0E2444;
  --paper-2: #16335E;
  --veil: rgba(14, 36, 68, 0.88);
  --ink: #A9CBF3;
  --ink-soft: #7FA2CE;
  --grid: #17335E;
  --grid-major: #234A82;
  --accent: #FFB020;
  --player-edge: #0E2444;
  --ok: #4BE39A;
  --goal: #6FD6FF;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.45;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 10px;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

.app {
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 0;
  max-width: 980px;
  margin: 0 auto;
}

/* Title row */
.top { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; }
.top > * { min-width: 0; }
.top h1 {
  margin: 0;
  font: 700 34px/0.9 var(--font-display);
  letter-spacing: 0.02em;
}
.top .sub {
  margin: 4px 0 0;
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.clock { text-align: right; }
.clock .time {
  display: block;
  font: 600 24px/1 var(--font-mono);
  font-variant-numeric: tabular-nums;
}
.clock .best {
  display: block;
  margin-top: 4px;
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}

/* Plan sheet */
.sheet {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  border: 1.5px solid var(--ink);
  background: var(--paper);
}
.sheet canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 14px;
  background: var(--veil);
  overflow: auto;
}
.card {
  width: 100%;
  max-width: 400px;
  padding: 20px;
  border: 1.5px solid var(--ink);
  background: var(--paper);
  display: grid;
  gap: 12px;
}
.card h2 {
  margin: 0;
  font: 700 44px/0.9 var(--font-display);
  letter-spacing: 0.02em;
}
.card p { margin: 0; text-wrap: pretty; }
.card .muted { color: var(--ink-soft); font-size: 12px; }
.card .stat {
  font: 600 22px/1.1 var(--font-mono);
  font-variant-numeric: tabular-nums;
}
.rules { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.rules li { display: grid; grid-template-columns: 76px 1fr; gap: 10px; }
.rules b {
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding-top: 1px;
}

/* Control strip */
.strip { display: grid; gap: 8px; }
.read { display: flex; flex-wrap: wrap; gap: 4px 20px; font-variant-numeric: tabular-nums; }
.read span.k {
  margin-right: 8px;
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.read span.v { font-weight: 600; }
.read .ok { color: var(--ok); }
.note { margin: 0; color: var(--ink-soft); font-size: 12px; min-height: 1.45em; text-wrap: pretty; }

.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.btn {
  appearance: none;
  -webkit-appearance: none;
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  background: transparent;
  border: 1.5px solid var(--ink);
  border-radius: 2px;
  min-height: 44px;
  min-width: 44px;
  padding: 0 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  touch-action: manipulation;
}
.btn:hover { background: var(--paper-2); }
.btn:active { background: var(--paper-2); }
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: var(--ink); opacity: 0.9; }
.btn:focus-visible, summary:focus-visible, input[type="range"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn[disabled] { opacity: 0.45; cursor: default; }
.btn.on { background: var(--ink); color: var(--paper); }
.chips { display: flex; gap: 6px; margin-left: auto; }
.chip { padding: 0; width: 44px; font-variant-numeric: tabular-nums; }
.chip.on { background: var(--ink); color: var(--paper); }
.rot { touch-action: none; }
.rot svg { width: 20px; height: 20px; }

details.tune summary {
  cursor: pointer;
  color: var(--ink-soft);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 6px 0;
}
.tune .sliders { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 18px; padding-top: 4px; }
.tune label { display: grid; gap: 4px; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); }
.tune input[type="range"] { width: 100%; accent-color: var(--accent); }

@media (max-width: 520px) {
  .top h1 { font-size: 30px; }
  .tune .sliders { grid-template-columns: 1fr; }
  .chips { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}