:root {
  --bg: #0b1224;
  --panel: #0f172a;
  --accent: #22d3ee;
  --text: #e5e7eb;
  --muted: #94a3b8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at 25% 25%, rgba(34, 211, 238, 0.12), transparent 40%),
    var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.game-header {
  text-align: center;
  margin-bottom: 16px;
}

.back {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.tagline {
  color: var(--muted);
  margin: 4px 0 0;
}

.game-shell {
  background: var(--panel);
  border: 1px solid #1f2937;
  border-radius: 16px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.35);
}

#game-canvas {
  background: #0a1325;
  border: 1px solid #111827;
  border-radius: 8px;
}

.hint {
  margin: 0;
  color: var(--muted);
}