:root {
  --bg: #11151f;
  --board: #1a2030;
  --cell: #232b3e;
  --line: #2c364d;
  --wall: #e9e4d8;
  --ink: #eef0f5;
  --muted: #8b93a8;
  --dot: #0b0e16;
  --dot-ink: #ffffff;
  --panel: #171c29;
  --accent: #f2b544;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f3efe6;
    --board: #e4ddcf;
    --cell: #fbf8f2;
    --line: #d6cdbb;
    --wall: #2a2620;
    --ink: #24211c;
    --muted: #7a7266;
    --dot: #24211c;
    --dot-ink: #ffffff;
    --panel: #fbf8f2;
    --accent: #c9781a;
    color-scheme: light;
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--ink); overflow: hidden;
  font: 16px/1.4 ui-rounded, "SF Pro Rounded", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-user-select: none; user-select: none; overscroll-behavior: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

#app { position: fixed; inset: 0; display: flex; flex-direction: column;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left); }

#bar { display: grid; grid-template-columns: 56px 1fr 72px; align-items: center; height: 56px; padding: 0 8px; }
#bar .icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; }
#bar .icon svg { width: 24px; height: 24px; }
#title { text-align: center; display: flex; flex-direction: column; line-height: 1.15; }
#t-main { font-weight: 700; letter-spacing: .02em; }
#t-sub { font-size: 13px; color: var(--muted); }
#timer { text-align: right; padding-right: 8px; font-variant-numeric: tabular-nums; font-weight: 600; color: var(--muted); }

svg { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

#stage { position: relative; flex: 1; min-height: 0; }
#cv { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; display: block; }

#toast { position: absolute; left: 50%; top: 10px; transform: translate(-50%, -8px); opacity: 0;
  background: var(--panel); color: var(--ink); padding: 8px 14px; border-radius: 999px; font-size: 14px; font-weight: 600;
  box-shadow: 0 6px 24px rgba(0,0,0,.25); transition: opacity .25s, transform .25s; pointer-events: none; white-space: nowrap; }
#toast.show { opacity: 1; transform: translate(-50%, 0); }

#tools { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; padding: 6px 12px 10px; }
#tools button { display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 8px 0;
  border-radius: 14px; font-size: 12px; color: var(--muted); }
#tools button svg { width: 24px; height: 24px; }
#tools button:active, #bar .icon:active { background: var(--cell); }
#tools button.on { color: var(--accent); }

.sheet { position: fixed; inset: 0; background: var(--bg); display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .25s; z-index: 10; overflow-y: auto;
  padding: env(safe-area-inset-top) 20px env(safe-area-inset-bottom); }
.sheet.show { opacity: 1; pointer-events: auto; }
#finish { background: color-mix(in srgb, var(--bg) 88%, transparent); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
.sheet-body { width: 100%; max-width: 380px; display: flex; flex-direction: column; gap: 12px; padding: 24px 0; }
.brand { text-align: center; margin-bottom: 12px; }
.brand .logo { width: 84px; height: 84px; stroke: none; }
.brand h1 { margin: 6px 0 4px; font-size: 38px; letter-spacing: .01em; }
.brand p { margin: 0; color: var(--muted); }
h2 { margin: 0 0 4px; font-size: 26px; text-align: center; }

button.big { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; text-align: left;
  background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 16px 18px; }
button.big b { font-size: 18px; }
button.big small { color: var(--muted); font-size: 14px; }
button.big:active { transform: scale(.985); }
button.big.close, #fin-share, #fin-map { align-items: center; }
button.link { color: var(--muted); font-size: 14px; padding: 6px; text-decoration: underline; text-underline-offset: 3px; }
.row { display: flex; gap: 10px; }
button.small { flex: 1; padding: 12px; border-radius: 14px; background: var(--panel); border: 1px solid var(--line); font-size: 15px; }
.fine { color: var(--muted); font-size: 13px; text-align: center; margin: 0; }
.big-num { font-size: 44px; font-weight: 800; text-align: center; margin: 4px 0; font-variant-numeric: tabular-nums; }

.rules { margin: 0; padding-left: 22px; display: flex; flex-direction: column; gap: 10px; color: var(--ink); }
.rules li::marker { color: var(--accent); font-weight: 700; }