:root {
  --mint: #8BF5C5;
  --mint-dim: #5bbf97;
  --bg: #0d1117;
  --panel-bg: #161b22;
  --board-bg: #10161d;
  --grid: rgba(139, 245, 197, 0.07);
  --text: #e6f5ee;
  --danger: #ff5c5c;
  --gold: #ffd700;
  --pixel: 'Press Start 2P', cursive;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--pixel);
  overflow: hidden;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Screens ── */
.screen {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  transition: opacity 0.25s;
}
.screen.hidden { display: none; }

.panel {
  background: var(--panel-bg);
  border: 2px solid var(--mint);
  border-radius: 14px;
  padding: 32px 26px;
  width: 100%; max-width: 380px;
  text-align: center;
  box-shadow: 0 0 30px rgba(139, 245, 197, 0.15);
}

.logo {
  font-family: 'Pacifico', cursive;
  font-size: 2.4rem;
  color: var(--mint);
  margin-bottom: 12px;
  text-shadow: 0 2px 12px rgba(139, 245, 197, 0.4);
}

h2 {
  font-size: 1rem;
  color: var(--mint);
  margin-bottom: 18px;
  line-height: 1.5;
}

.hint {
  font-family: 'Pacifico', cursive;
  font-size: 1rem;
  opacity: 0.7;
  margin-bottom: 24px;
  line-height: 1.4;
}

/* ── Name entry ── */
.name-entry { margin-bottom: 20px; }
.name-entry label {
  display: block;
  font-size: 0.6rem;
  margin-bottom: 10px;
  opacity: 0.7;
  letter-spacing: 1px;
}
#player-name {
  width: 100%;
  padding: 12px;
  background: var(--bg);
  border: 2px solid var(--mint-dim);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--pixel);
  font-size: 0.7rem;
  text-align: center;
}
#player-name:focus { outline: none; border-color: var(--mint); }
.error {
  color: var(--danger);
  font-size: 0.55rem;
  height: 1em;
  margin-top: 8px;
}

/* ── Buttons ── */
.btn {
  display: block;
  width: 100%;
  padding: 14px;
  margin: 8px 0;
  background: #21262d;
  color: var(--text);
  border: none;
  border-radius: 8px;
  font-family: var(--pixel);
  font-size: 0.7rem;
  cursor: pointer;
  transition: transform 0.12s, background 0.2s, box-shadow 0.2s;
}
.btn:hover { background: #2d343d; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: var(--mint);
  color: #06281c;
  font-weight: bold;
}
.btn-primary:hover { background: #a3ffd6; box-shadow: 0 4px 18px rgba(139,245,197,0.35); }

.back-link {
  display: inline-block;
  margin-top: 16px;
  color: var(--mint-dim);
  text-decoration: none;
  font-size: 0.55rem;
  letter-spacing: 1px;
}
.back-link:hover { color: var(--mint); }

/* ── Leaderboard list ── */
#lb-list {
  list-style: none;
  text-align: left;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--mint-dim);
  border-radius: 8px;
  margin-bottom: 18px;
  max-height: 300px;
  overflow-y: auto;
}
#lb-list li {
  border-bottom: 1px solid rgba(139,245,197,0.1);
}
#lb-list li:last-child { border-bottom: none; }
.lb-row {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; font-size: 0.6rem;
}
.lb-row.you { background: rgba(255, 215, 0, 0.12); }
.lb-row .rank { min-width: 2em; text-align: center; font-size: 0.8rem; }
.lb-row .nm { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-row .pts { color: var(--mint); font-weight: bold; }
.lb-loading { padding: 16px; text-align: center; opacity: 0.5; font-size: 0.6rem; }
.lb-message {
  font-size: 0.65rem; margin-bottom: 14px; line-height: 1.5;
}

/* ── Game screen ── */
#game-screen { flex-direction: column; gap: 14px; }

.hud {
  display: flex; gap: 10px;
  width: 100%; max-width: 460px;
  justify-content: space-between;
}
.hud-item {
  flex: 1;
  background: var(--panel-bg);
  border: 1px solid var(--mint-dim);
  border-radius: 8px;
  padding: 10px 6px;
  font-size: 0.5rem;
  letter-spacing: 1px;
  opacity: 0.85;
}
.hud-item span {
  display: block;
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--mint);
}

.board-wrap {
  position: relative;
  border: 2px solid var(--mint);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 0 24px rgba(139,245,197,0.18);
  background: var(--board-bg);
}
#board { display: block; }

.controls-hint {
  font-size: 0.5rem;
  opacity: 0.45;
  text-align: center;
  letter-spacing: 0.5px;
  line-height: 1.6;
}

/* Pause overlay */
.board-wrap.paused::after {
  content: "PAUSED";
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.7);
  color: var(--mint);
  font-size: 1rem;
  letter-spacing: 2px;
}

@media (max-width: 420px) {
  .logo { font-size: 2rem; }
  .panel { padding: 26px 18px; }
}