:root{color:#27323a;background:#f6f4ea;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}body{min-width:320px;overflow-x:hidden}button,input,textarea,select{font:inherit}.app-shell{min-height:100dvh;padding:max(20px,env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) max(24px,env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}.game-layout{display:grid;gap:18px;width:min(100%,520px);margin:0 auto}.game-header{display:flex;align-items:end;justify-content:space-between;gap:16px}.game-header h1{margin:0;font-size:48px;line-height:1}.score-panel{display:flex;gap:8px}.score-box{min-width:72px;padding:8px 10px;border-radius:8px;background:#2f6f73;color:#fff;text-align:center}.score-box span{display:block;color:#d6ece8;font-size:11px;font-weight:700;line-height:1;text-transform:uppercase}.score-box strong{display:block;margin-top:4px;font-size:18px;line-height:1}.board{position:relative;aspect-ratio:1;width:100%;padding:10px;border-radius:8px;background:#9f968b;touch-action:none}.board-stage{position:relative}.board-grid,.tile-grid{position:absolute;top:10px;right:10px;bottom:10px;left:10px;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr);gap:10px}.board-cell{border-radius:6px;background:rgba(246,244,234,.45)}.tile{display:grid;width:100%;height:100%;min-width:0;min-height:0;align-self:stretch;justify-self:stretch;place-items:center;border-radius:6px;background:#eee4da;color:#5e574f;font-size:clamp(26px,11vw,48px);font-weight:800;line-height:1}.tile span{display:block}.tile-2{background:#eee4da}.tile-4{background:#e6d6b8}.tile-8{background:#e7a55f;color:#fff}.tile-16{background:#e77c64;color:#fff}.tile-32{background:#d95f73;color:#fff}.tile-64{background:#b94d7b;color:#fff}.tile-128{background:#4d8d8a;color:#fff;font-size:clamp(22px,9vw,42px)}.tile-256{background:#2f6f73;color:#fff;font-size:clamp(22px,9vw,42px)}.tile-512{background:#3d6fb6;color:#fff;font-size:clamp(22px,9vw,42px)}.tile-1024{background:#6554a6;color:#fff;font-size:clamp(18px,7.5vw,34px)}.tile-2048,.tile-super{background:#293241;color:#fff;font-size:clamp(18px,7.5vw,34px)}.controls{display:flex;justify-content:center;gap:10px}.control-button{display:inline-flex;min-height:44px;align-items:center;justify-content:center;gap:8px;border:0;border-radius:8px;padding:0 16px;background:#293241;color:#fff;font-weight:700;cursor:pointer}.control-button:disabled{cursor:not-allowed;opacity:.45}.game-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;border-radius:8px;background:rgba(246,244,234,.78)}.overlay-panel{display:grid;gap:14px;justify-items:center}.overlay-panel h2{margin:0;font-size:28px}.overlay-actions{display:flex;gap:10px}.overlay-actions button{min-height:42px;border:0;border-radius:8px;padding:0 14px;background:#293241;color:#fff;font-weight:700}@media (max-width: 480px){.game-header{align-items:stretch;flex-direction:column}.score-panel{display:grid;grid-template-columns:repeat(3,1fr)}.score-box{min-width:0}}