:root {
  --bg: #0f1115;
  --panel: #181b22;
  --border: #2a2f3a;
  --text: #e6e8ec;
  --dim: #9aa0aa;
  --accent: #7c5cff;
}

* { box-sizing: border-box; }

body.game-page {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.game-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.game-bar h1 { margin: 0; font-size: 1.25rem; font-weight: 700; }

.back {
  color: var(--dim);
  font-size: 0.9rem;
  text-decoration: none;
}
.back:hover { color: var(--accent); }

.score {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--accent);
}

.game-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 1.5rem;
}

#board {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: block;
  max-width: 90vmin;
  max-height: 90vmin;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: blur(4px);
  padding: 2rem;
  border-radius: 12px;
  margin: 1.5rem;
  max-width: 90vmin;
}

.overlay h2 {
  margin: 0 0 0.5rem;
  font-size: 2rem;
  background: linear-gradient(135deg, var(--accent), #ff6bcb);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.overlay p { color: var(--dim); margin: 0.25rem 0; }
.overlay .hint { font-size: 0.8rem; margin-top: 1rem; }

#start-btn {
  margin-top: 1rem;
  padding: 0.75rem 2rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}
#start-btn:hover { background: #9479ff; }

.overlay.hidden { display: none; }