:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100vh;background:#0a0a0a;color:#fafafa;overflow-x:hidden}.shell{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:1rem;user-select:none;-webkit-user-select:none}.game-header{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:400px;margin-bottom:1rem}.game-title{font-size:1.5rem;font-weight:700;letter-spacing:-.02em;background:linear-gradient(135deg,#ff6b6b,orange,#ffdd57);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.score-display{font-size:1.1rem;font-weight:600;color:#ffdd57}.best-score{font-size:.75rem;color:#fff6;text-align:right}.board-container{position:relative;margin-bottom:1.5rem}.board{display:grid;grid-template-columns:repeat(8,1fr);gap:2px;background:#ffffff0d;border:2px solid rgba(255,255,255,.1);border-radius:8px;padding:2px;width:340px;height:340px}.cell{border-radius:4px;background:#ffffff08;transition:background .15s}.cell.filled{box-shadow:inset 0 0 0 1px #ffffff26}.cell.preview-valid{background:#64ff6440;box-shadow:inset 0 0 0 1px #64ff6466}.cell.preview-invalid{background:#ff3c3c33;box-shadow:inset 0 0 0 1px #ff3c3c4d}.cell.clearing{animation:clearFlash .4s ease-out}@keyframes clearFlash{0%{transform:scale(1);filter:brightness(2)}50%{transform:scale(1.1);filter:brightness(3)}to{transform:scale(0);opacity:0}}.color-0{background:#ff6b6b}.color-1{background:orange}.color-2{background:#ffdd57}.color-3{background:#6bcb77}.color-4{background:#4d96ff}.color-5{background:#9b59b6}.color-6{background:#ff6b9d}.piece-tray{display:flex;gap:1rem;justify-content:center;align-items:center;min-height:100px;margin-bottom:1rem}.piece-slot{display:flex;align-items:center;justify-content:center;width:110px;height:90px;background:#ffffff08;border:1px dashed rgba(255,255,255,.1);border-radius:8px;cursor:grab;touch-action:none;transition:transform .15s,border-color .15s}.piece-slot:hover:not(.disabled){border-color:#ffffff4d;transform:scale(1.05)}.piece-slot.disabled{opacity:.2;cursor:not-allowed}.piece-slot.dragging{opacity:.3}.piece-grid{display:inline-grid;gap:2px}.piece-cell{width:20px;height:20px;border-radius:3px;box-shadow:inset 0 0 0 1px #ffffff26}.drag-ghost{position:fixed;pointer-events:none;z-index:1000;opacity:.85;display:inline-grid;gap:2px}.drag-ghost .piece-cell{width:38px;height:38px;border-radius:5px;box-shadow:inset 0 0 0 1px #fff3,0 2px 8px #0006}.game-over-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000c;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:999;animation:fadeIn .3s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.game-over-overlay h2{font-size:2rem;font-weight:700;margin-bottom:.5rem;color:#ff6b6b}.game-over-overlay .final-score{font-size:1.5rem;color:#ffdd57;margin-bottom:1.5rem}.restart-btn{padding:.75rem 2rem;font-size:1rem;font-weight:600;border:none;border-radius:8px;background:linear-gradient(135deg,#ff6b6b,orange);color:#fff;cursor:pointer;transition:transform .15s,box-shadow .15s}.restart-btn:hover{transform:scale(1.05);box-shadow:0 4px 20px #ff6b6b66}.combo-text{position:absolute;font-size:1.5rem;font-weight:800;color:#ffdd57;text-shadow:0 0 10px rgba(255,221,87,.5);animation:comboPop .6s ease-out forwards;pointer-events:none;z-index:10}@keyframes comboPop{0%{transform:scale(.5) translateY(0);opacity:0}30%{transform:scale(1.3) translateY(-10px);opacity:1}to{transform:scale(1) translateY(-40px);opacity:0}}@media(max-width:400px){.board{width:300px;height:300px}.piece-slot{width:90px;height:75px}.piece-cell{width:16px;height:16px}.drag-ghost .piece-cell{width:32px;height:32px}}