:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: #161f35;
  --text: #f4f7ff;
  --muted: #b0b7d0;
  --accent: #4ade80;
  --danger: #ef4444;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background: radial-gradient(circle at top, #1d2e5b, var(--bg));
  color: var(--text);
}

.app {
  width: min(100%, 900px);
  margin: 0 auto;
  padding: 1rem;
}

h1, h2 { margin: 0.4rem 0; }
p { color: var(--muted); }

.panel {
  background: rgba(22, 31, 53, 0.92);
  border: 1px solid #2f3c63;
  border-radius: 14px;
  padding: 0.9rem;
  margin-bottom: 0.9rem;
}

.hud {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
  text-align: center;
}

.game-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
}

canvas {
  width: min(100%, 420px);
  height: auto;
  border: 2px solid #30406e;
  border-radius: 10px;
  background: linear-gradient(#0f1530, #1b2d5c);
}

.message {
  margin: 0;
  min-height: 1.2rem;
  text-align: center;
}

.actions,
.touch-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
}

button {
  border: none;
  border-radius: 10px;
  padding: 0.65rem 0.95rem;
  font-weight: 700;
  color: var(--text);
  background: #334269;
}

.primary { background: var(--accent); color: #0d1a13; }
.danger { background: var(--danger); }

.touch-btn {
  min-width: 140px;
  min-height: 60px;
  font-size: 1.5rem;
}

.controls-panel ul {
  margin-top: 0.4rem;
  color: var(--muted);
}

@media (max-width: 600px) {
  .hud {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .touch-btn {
    min-width: 44vw;
    min-height: 72px;
  }
}