:root {
  --bg: #f6f4ef; --fg: #1c1b19; --muted: #6b6760; --card: #ffffff; --line: #e3dfd6;
  --accent: #2f6b4f; --accent-fg: #ffffff; --canvas-bg: #ffffff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121412; --fg: #ecebe6; --muted: #9b988f; --card: #1b1e1b; --line: #2c302c;
    --accent: #7cc59d; --accent-fg: #0d1a12; --canvas-bg: #ffffff;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
  padding: max(1.5rem, env(safe-area-inset-top)) 1rem max(2rem, env(safe-area-inset-bottom));
}
main { max-width: 64rem; margin: 0 auto; }
h1 { font-size: clamp(2rem, 6vw, 3.2rem); line-height: 1.05; margin: .5rem 0 .75rem; letter-spacing: -0.02em; }
.lede { max-width: 44rem; color: var(--muted); margin: 0 0 1.5rem; font-size: 1.05rem; }
.lede strong { color: var(--fg); }

.stage { display: grid; grid-template-columns: minmax(0, 1fr) 20rem; gap: 1.5rem; align-items: start; }
@media (max-width: 760px) { .stage { grid-template-columns: 1fr; } }

.canvas-wrap { position: relative; }
canvas {
  display: block; width: 100%; aspect-ratio: 1; max-width: 100%;
  background: var(--canvas-bg); border-radius: 14px; border: 1px solid var(--line);
  image-rendering: pixelated; cursor: crosshair; touch-action: none;
}
.status {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  background: rgba(0,0,0,.7); color: #fff; padding: .4rem .8rem; border-radius: 8px; font-size: .9rem;
}

.panel {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 1rem;
  display: flex; flex-direction: column; gap: .9rem;
}
.emoji-picker { display: grid; grid-template-columns: repeat(auto-fill, minmax(2.8rem, 1fr)); gap: .4rem; }
.emoji-picker button {
  font-size: 1.6rem; padding: .3rem 0; background: transparent; border: 2px solid var(--line);
  border-radius: 10px; cursor: pointer; line-height: 1.2;
}
.emoji-picker button[aria-checked="true"] { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 15%, transparent); }
.buttons { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem; }
.buttons button {
  font: inherit; font-size: .88rem; padding: .55rem .5rem; border-radius: 10px; cursor: pointer;
  background: var(--accent); color: var(--accent-fg); border: 0; font-weight: 600;
}
.buttons button:hover { filter: brightness(1.08); }
.control { display: flex; flex-direction: column; gap: .2rem; font-size: .9rem; }
.control span { display: flex; justify-content: space-between; gap: .5rem; }
.control output { color: var(--muted); font-variant-numeric: tabular-nums; }
.control small { color: var(--muted); font-size: .78rem; line-height: 1.4; }
input[type=range] { width: 100%; accent-color: var(--accent); }
.toggle { display: flex; gap: .5rem; align-items: flex-start; font-size: .9rem; cursor: pointer; }
.toggle input { accent-color: var(--accent); margin-top: .3rem; }
.stats { margin: 0; color: var(--muted); font-size: .85rem; font-variant-numeric: tabular-nums; }

.explain { margin-top: 3rem; max-width: 46rem; }
.explain h2 { font-size: 1.4rem; }
.explain li { margin: .4rem 0; }
.credit { color: var(--muted); font-size: .9rem; }
a { color: var(--accent); }