*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,sans-serif;background:#faf8ef;color:#776e65}.app{--size: min(92vw, 480px);--gap: calc(var(--size) * .03);--cell: calc((var(--size) - var(--gap) * 5) / 4);width:var(--size);margin:0 auto;padding:16px 0}header{display:flex;justify-content:space-between;align-items:center}h1{font-size:clamp(48px,14vw,72px);margin:0;color:#776e65}.scores{display:flex;gap:6px}.score{background:#bbada0;color:#fff;border-radius:6px;padding:6px 14px;text-align:center;font-weight:700;font-size:20px;min-width:70px}.score span{display:block;font-size:12px;text-transform:uppercase;color:#eee4da}.bar{display:flex;justify-content:space-between;align-items:center;margin:8px 0 14px;gap:8px}.bar p{margin:0}button{background:#8f7a66;color:#f9f6f2;border:0;border-radius:6px;padding:10px 16px;font-weight:700;font-size:15px;cursor:pointer}button:hover{background:#9f8b77}.board{position:relative;width:var(--size);height:var(--size);background:#bbada0;border-radius:8px;touch-action:none;-webkit-user-select:none;user-select:none}.cell,.tile{position:absolute;width:var(--cell);height:var(--cell);left:calc(var(--gap) + var(--c) * (var(--cell) + var(--gap)));top:calc(var(--gap) + var(--r) * (var(--cell) + var(--gap)))}.cell{background:#eee4da59;border-radius:6px}.tile{transition:left .11s ease-in-out,top .11s ease-in-out;z-index:1}.inner{width:100%;height:100%;border-radius:6px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:calc(var(--cell) * .45);background:#eee4da;color:#776e65}.inner.new{animation:appear .2s ease .1s backwards}.inner.merged{animation:pop .2s ease .1s;z-index:2}@keyframes appear{0%{transform:scale(0);opacity:0}to{transform:scale(1);opacity:1}}@keyframes pop{0%{transform:scale(0)}50%{transform:scale(1.2)}to{transform:scale(1)}}.v4{background:#ede0c8}.v8{background:#f2b179;color:#f9f6f2}.v16{background:#f59563;color:#f9f6f2}.v32{background:#f67c5f;color:#f9f6f2}.v64{background:#f65e3b;color:#f9f6f2}.v128,.v256,.v512{color:#f9f6f2;font-size:calc(var(--cell) * .38)}.v128{background:#edcf72}.v256{background:#edcc61}.v512{background:#edc850}.v1024,.v2048,.vsuper{color:#f9f6f2;font-size:calc(var(--cell) * .3)}.v1024{background:#edc53f}.v2048{background:#edc22e;box-shadow:0 0 20px #edc22e88}.vsuper{background:#3c3a32}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:10;background:#eee4dabf;border-radius:8px;display:flex;flex-direction:column;align-items:center;justify-content:center;animation:appear .4s ease}.overlay.win{background:#edc22e8c;color:#f9f6f2}.overlay h2{font-size:48px;margin:0 0 16px}.overlay div{display:flex;gap:8px}.help{margin-top:16px;text-align:center}