.game-head{display:flex;justify-content:space-between;align-items:center;margin:2px 0 14px}.game-head>div{display:flex;gap:8px}.scorebox{min-width:84px;background:#16233a;border:1px solid #293954;border-radius:10px;padding:5px 12px;text-align:center}.scorebox small{display:block;color:#94a6c6;font-size:10px;text-transform:uppercase;line-height:1.2}.scorebox b{font-size:19px;color:#fff}.board-wrap{position:relative;width:min(100%,500px);margin:0 auto;aspect-ratio:1;background:#26344a;border:8px solid #26344a;border-radius:14px;touch-action:none}.board{width:100%;height:100%;display:grid;grid-template-columns:repeat(4,1fr);grid-template-rows:repeat(4,1fr);gap:8px}.cell{border-radius:9px;background:#34435a;display:grid;place-items:center;font-weight:800;font-size:clamp(22px,6vw,44px);color:#fff;transition:transform .12s,background .12s}.cell[data-v="2"],.cell[data-v="4"]{color:#463e35;background:#eee4d8}.cell[data-v="8"]{background:#f2b179}.cell[data-v="16"]{background:#f59563}.cell[data-v="32"]{background:#f67c5f}.cell[data-v="64"]{background:#f65e3b}.cell[data-v="128"],.cell[data-v="256"],.cell[data-v="512"]{background:#edcf72;color:#fff;font-size:clamp(18px,5vw,36px)}.cell[data-v="1024"],.cell[data-v="2048"]{background:#edc53f;color:#fff;font-size:clamp(16px,4.5vw,30px);box-shadow:0 0 18px rgba(255,210,70,.3)}.cell[data-v="0"]{color:transparent}.message{position:absolute;inset:0;border-radius:8px;background:rgba(10,16,29,.82);backdrop-filter:blur(4px);display:flex;flex-direction:column;justify-content:center;align-items:center;gap:12px;text-align:center}.message[hidden]{display:none}.message strong{font-size:32px}.message span{color:#b9c8e2}.message button{margin-top:8px}.mobile-hint{text-align:center;color:#8596b4;font-size:13px;margin:14px 0 0}@media(max-width:500px){.board-wrap{border-width:5px}.board{gap:5px}.cell{border-radius:6px}.scorebox{min-width:68px;padding:4px 8px}}