/* Mini Tetris styles */
:root{
  --bg:#0f172a; --panel:#0b1220; --ink:#e5e7eb; --muted:#9ca3af; --line:#1f2937;
  --brand:#60a5fa; --accent:#22d3ee; --success:#34d399; --warning:#fbbf24; --danger:#f87171;
  --shadow:0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:radial-gradient(1200px 800px at 20% -10%, #172554 0%, #0f172a 40%, #0b1220 100%);
  color:var(--ink); font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Arial,sans-serif;
}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.site-header{position:sticky;top:0;background:rgba(11,18,32,.8);backdrop-filter:blur(6px);border-bottom:1px solid var(--line);z-index:10}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding:10px 0}
.brand{margin:0;font-size:20px;letter-spacing:.5px;color:var(--brand)}
.nav{display:flex;gap:8px}
.btn{display:inline-block;padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:#0b1220;color:var(--ink);text-decoration:none;box-shadow:var(--shadow);}
.btn:hover{border-color:#334155}
.btn-ghost{background:transparent}

.layout{display:grid;grid-template-columns:1fr 320px;gap:18px;padding:18px}
.panel{background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(255,255,255,.0));border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);}
.board-panel{display:grid;place-items:center;padding:16px}
.side-panel{padding:16px;display:flex;flex-direction:column;gap:16px}
.scorecard .line{display:flex;align-items:center;justify-content:space-between;border-bottom:1px dashed #223049;padding:6px 0}
.next h2,.controls h2{margin:.3em 0 .3em;font-size:16px;color:var(--muted)}
.controls ul{margin:.3em 0 0; padding-left:18px}

.site-footer{border-top:1px solid var(--line);margin-top:10px}
.site-footer .container{padding:10px 0;color:var(--muted);font-size:14px}

canvas{image-rendering:pixelated}

.modal{position:fixed;inset:0;background:rgba(0,0,0,.5);display:grid;place-items:center}
.modal.hidden{display:none}
.modal-card{background:#0b1220;border:1px solid var(--line);border-radius:16px;padding:18px 16px;max-width:520px;box-shadow:var(--shadow)}
.modal-card h3{margin-top:0}

/* Touch Controls */
.touch-controls {
  display: none;
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 400px;
  justify-content: center;
  gap: 15px;
  z-index: 1000;
  padding-bottom: env(safe-area-inset-bottom);
  pointer-events: none;
}

.t-btn {
  pointer-events: auto;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  backdrop-filter: blur(4px);
  transition: background 0.1s, transform 0.1s;
}

.t-btn:active {
  background: rgba(255, 255, 255, 0.4);
  transform: scale(0.95);
}

@media (max-width: 800px) {
  .touch-controls {
    display: flex;
    flex-wrap: wrap;
  }
  .layout {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-bottom: 100px; /* Space for controls */
  }
  .side-panel {
    width: 100%;
    flex-direction: row;
    justify-content: space-around;
    flex-wrap: wrap;
  }
  .controls { display: none; } /* Hide keyboard instructions on mobile */
}