.tetris-game{margin:2rem auto}.game-area{display:grid;grid-template-columns:1fr 2fr 1fr;gap:2rem;align-items:start;justify-items:center}.game-board{position:relative;border:3px solid var(--border-color);border-radius:var(--border-radius);background:#000;box-shadow:0 8px 32px rgba(0,0,0,.3)}#game-canvas{display:block;border-radius:var(--border-radius)}.hold-piece,.next-piece{text-align:center;padding:1rem;background:var(--surface);border-radius:var(--border-radius);border:1px solid var(--border-color)}.hold-piece h4,.next-piece h4{margin:0 0 1rem;color:var(--primary)}#hold-canvas,#next-canvas{border:1px solid var(--border-color);border-radius:var(--border-radius);background:#000}.game-over{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.9);color:#fff;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;border-radius:var(--border-radius)}.game-over h2{color:#f44;margin-bottom:1rem}.mobile-controls{grid-column:1/-1;display:none;flex-direction:column;gap:1rem;margin-top:2rem}.control-row{display:flex;justify-content:center;gap:1rem}.control-btn{padding:1rem 1.5rem;font-size:1.25rem;font-weight:700;background:var(--primary);color:#fff;border:none;border-radius:var(--border-radius);cursor:pointer;touch-action:manipulation;user-select:none;transition:background-color .2s;min-width:80px}.control-btn:active,.control-btn:hover{background:var(--primary-dark)}.game-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:1rem;margin-bottom:1rem;padding:1rem;background:var(--surface);border-radius:var(--border-radius);border:1px solid var(--border-color)}.stat-group{text-align:center}.stat-label{display:block;font-size:.875rem;color:var(--text-secondary);margin-bottom:.25rem}.stat-value{display:block;font-size:1.25rem;font-weight:700;color:var(--primary)}@media (max-width:768px){.game-area{grid-template-columns:1fr;gap:1rem}.hold-piece,.next-piece{display:none}.mobile-controls{display:flex}#game-canvas{width:100%;max-width:300px;height:auto}.game-controls{flex-wrap:wrap;gap:.5rem}.game-controls .btn{flex:1;min-width:80px}}.high-scores-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.5rem}.score-entry{display:flex;justify-content:space-between;align-items:center;padding:.5rem;background:var(--background);border-radius:var(--border-radius);border:1px solid var(--border-color)}.score-entry-info{flex:1}.score-entry-date{font-size:.75rem;color:var(--text-secondary)}.tetris-i{background-color:#00f5ff}.tetris-o{background-color:#ff0}.tetris-t{background-color:#a000f0}.tetris-s{background-color:#0f0}.tetris-z{background-color:red}.tetris-j{background-color:#00f}.tetris-l{background-color:#ff7f00}