:root {
  --bg: #0a0a0e;
  --bg-panel: #121218;
  --border: #2a2a35;
  --text: #c9c9d4;
  --text-dim: #6a6a78;
  --accent: #52c97a;
  --accent-2: #4bc9f0;
  --danger: #e05252;
  font-family: 'Share Tech Mono', 'Courier New', monospace;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; min-height: 100%;
  background: var(--bg); color: var(--text);
  font-family: 'Share Tech Mono', 'Courier New', monospace;
}
.hidden { display: none !important; }

button {
  font-family: inherit;
  background: var(--bg-panel);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 14px;
  cursor: pointer;
  border-radius: 3px;
  font-size: 0.95rem;
}
button:hover { border-color: var(--accent); color: var(--accent); }
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.4; cursor: default; }
button:disabled:hover { border-color: var(--border); color: var(--text); }

input[type="text"] {
  font-family: inherit;
  background: #050507;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 8px;
  width: 100%;
}

.muted { color: var(--text-dim); font-size: 0.82rem; }

/* ---------- Title screen ---------- */
#title-screen {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.title-box {
  max-width: 460px; text-align: center;
  border: 1px solid var(--border); background: var(--bg-panel);
  padding: 36px 28px; border-radius: 6px;
}
.game-title {
  font-size: 1.6rem; letter-spacing: 0.12em; color: var(--accent);
  margin: 0; text-shadow: 0 0 10px rgba(82, 201, 122, 0.5);
}
.subtitle { color: var(--text-dim); margin-top: 8px; letter-spacing: 0.08em; }
.ad-slot {
  width: 100%; min-height: 90px; margin-top: 20px;
  border: 1px dashed var(--border); border-radius: 6px;
  background: var(--bg-panel);
  display: flex; align-items: center; justify-content: center;
}
.footer-links {
  margin-top: 14px; display: flex; gap: 16px; justify-content: center;
  flex-wrap: wrap;
}
.footer-links a { color: var(--text-dim); font-size: 0.75rem; text-decoration: none; }
.footer-links a:hover { color: var(--text); }
.title-actions {
  display: flex; gap: 10px; justify-content: center;
  margin-top: 24px; flex-wrap: wrap;
}

/* ---------- Game screen ---------- */
#game-screen {
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: center;
  padding: 20px 12px;
}
#hud {
  display: flex; align-items: center; gap: 18px;
  margin-bottom: 12px; font-size: 0.9rem;
}
.stat-row { display: flex; gap: 6px; color: var(--text-dim); }
.stat-row span:last-child { color: var(--accent); font-weight: bold; }

#grid {
  margin: 0;
  padding: 10px;
  background: #050507;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 16px;
  line-height: 1.05;
  letter-spacing: 2px;
  color: var(--border);
  user-select: none;
}

.message {
  min-height: 1.4em; margin: 10px 0 0; color: var(--accent-2);
  font-size: 0.9rem;
}

#touch-controls {
  display: none;
  margin-top: 14px;
}
.dpad {
  display: grid;
  grid-template-columns: repeat(3, 52px);
  grid-template-rows: repeat(2, 52px);
  gap: 4px;
}
.dbtn { font-size: 1.2rem; padding: 0; }
.dup { grid-column: 2; grid-row: 1; }
.dleft { grid-column: 1; grid-row: 2; }
.ddown { grid-column: 2; grid-row: 2; }
.dright { grid-column: 3; grid-row: 2; }

@media (max-width: 720px) {
  #touch-controls { display: flex; }
  #grid { font-size: 13px; letter-spacing: 1px; }
}

/* ---------- Modals ---------- */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center;
  padding: 16px; z-index: 10;
}
.modal-box {
  background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: 6px; padding: 22px 24px;
  max-width: 420px; width: 100%; max-height: 85vh; overflow-y: auto;
}
.modal-box h2 { color: var(--accent); margin-top: 0; }
.modal-box p { font-size: 0.88rem; line-height: 1.5; }

/* ---------- Leaderboard ---------- */
#leaderboard-list {
  display: flex; flex-direction: column; gap: 4px;
  max-height: 300px; overflow-y: auto; margin: 12px 0;
}
.leaderboard-row {
  display: flex; align-items: center; gap: 10px; font-size: 0.85rem;
  padding: 6px 10px; border: 1px solid var(--border); border-radius: 4px;
  background: var(--bg-panel);
}
.leaderboard-row.you { border-color: var(--accent); color: var(--accent); }
.lb-rank { width: 22px; color: var(--text-dim); text-align: right; }
.leaderboard-row.you .lb-rank { color: var(--accent); }
.lb-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-score { color: var(--text-dim); }
.leaderboard-row.you .lb-score { color: var(--accent); }

#leaderboard-submit { display: flex; gap: 8px; margin: 10px 0; flex-wrap: wrap; }
#leaderboard-submit input { flex: 1; min-width: 140px; }
#leaderboard-submit p { flex-basis: 100%; margin: 0; }