:root {
  --bg: #faf7fd;
  --surface: #f1ebf8;
  --text: #201a26;
  --muted: #6a6270;
  --accent: #6750a4;
  --on-accent: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141018;
    --surface: #241f2c;
    --text: #e8e0ee;
    --muted: #a49dad;
    --accent: #cfbcff;
    --on-accent: #35275c;
  }
}

* {
  box-sizing: border-box;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  min-height: 100dvh;
  max-width: 46rem;
  margin: 0 auto;
  padding: max(1.5rem, env(safe-area-inset-top)) 1.5rem 2rem;
}

[hidden] { display: none !important; }
.screen[hidden] { display: none; }

h1 { font-size: 1.5rem; font-weight: 500; letter-spacing: 0.02em; }
h2 { font-size: 1.25rem; font-weight: 500; text-align: center; }

.count {
  font-size: clamp(3.5rem, 18vw, 5.5rem);
  font-weight: 300;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.muted { color: var(--muted); }

/* --- controls --- */

button {
  font: inherit;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  background: none;
  color: inherit;
}

.primary {
  background: var(--accent);
  color: var(--on-accent);
  padding: 0.85rem 2rem;
  min-width: 12rem;
}

.link {
  color: var(--accent);
  padding: 0.6rem 1rem;
}

.back {
  align-self: flex-start;
  position: absolute;
  top: max(1rem, env(safe-area-inset-top));
  left: 1rem;
  font-size: 1.5rem;
  line-height: 1;
  padding: 0.25rem 0.75rem;
}

textarea,
input[type="text"] {
  font: inherit;
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--muted);
  border-radius: 0.75rem;
  background: var(--surface);
  color: inherit;
}

textarea { resize: vertical; }

input[type="range"] {
  width: min(100%, 22rem);
  accent-color: var(--accent);
}

.phrases {
  list-style: none;
  padding: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.phrases button {
  width: 100%;
  text-align: left;
  border-radius: 0.75rem;
  padding: 0.9rem 1rem;
  font-size: 1.05rem;
}

.phrases button:hover { background: var(--surface); }

#custom-phrase {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
}

#custom-phrase[hidden] { display: none; }

/* --- tracing panel --- */

.step,
.tracer-host {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  width: 100%;
}

.step[hidden],
.tracer-host[hidden],
.phrases[hidden] { display: none; }

.phrase {
  font-size: 1.25rem;
  color: var(--muted);
}

canvas {
  display: block;
  width: 100%;
  height: clamp(280px, 60vh, 440px);
  background: var(--surface);
  border-radius: 1rem;
  color: var(--accent); /* read by the canvas as its ink colour */
  touch-action: none;
  cursor: crosshair;
}

.lag {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.875rem;
  accent-color: var(--accent);
}