:root {
  color-scheme: dark;
  --bg: #050711;
  --panel: rgba(15, 23, 42, 0.82);
  --line: rgba(148, 163, 184, 0.25);
  --text: #f8fafc;
  --muted: #a8b3c7;
  --accent: #34d399;
  --accent-2: #60a5fa;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
  background:
    radial-gradient(circle at 20% 10%, rgba(96, 165, 250, 0.26), transparent 34rem),
    radial-gradient(circle at 80% 90%, rgba(52, 211, 153, 0.24), transparent 28rem),
    linear-gradient(135deg, #050711 0%, #0f172a 100%);
  color: var(--text);
}

.shell {
  width: min(96vw, 980px);
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(320px, 1fr);
  gap: 28px;
  align-items: center;
}

.hero {
  padding: 30px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin: 0 0 16px;
}

h1 {
  margin: 0;
  font-size: clamp(4rem, 12vw, 8rem);
  line-height: 0.82;
  letter-spacing: -0.09em;
}

.intro {
  margin: 26px 0 0;
  max-width: 28rem;
  color: #dbeafe;
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 750;
  line-height: 1.18;
}

.game-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(18px);
}

.topbar {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.label {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

strong {
  font-size: 1.7rem;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 12px 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04111f;
  font-weight: 900;
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(52, 211, 153, 0.18);
}

button:hover { transform: translateY(-1px); }
button:active { transform: translateY(0); }

canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 20px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: #07111f;
  touch-action: none;
}

.instructions {
  margin-top: 16px;
  color: var(--muted);
  line-height: 1.45;
}

.instructions p { margin: 6px 0; }

#status {
  color: #fef08a;
  font-weight: 750;
}

@media (max-width: 820px) {
  body { padding: 18px; }
  .shell { grid-template-columns: 1fr; }
  .hero { padding: 8px 4px; text-align: center; }
  .intro { margin-left: auto; margin-right: auto; }
}