*{box-sizing:border-box}body{margin:0;background:#0b2423;color:#edf3df;font-family:system-ui,sans-serif}main{max-width:780px;margin:auto;padding:35px 20px}header{text-align:center}.eyebrow{color:#b8cba9;font-size:11px;letter-spacing:3px}h1{font-family:Georgia,serif;font-size:clamp(40px,8vw,64px);font-weight:400;margin:12px 0}header>p:last-child{color:#b6c5b7}.game{margin:26px 0;background:#13312f;border:1px solid #39544b;border-radius:24px;padding:22px;text-align:center;box-shadow:0 20px 55px #051c1b}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left}label{font-size:10px;letter-spacing:2px;color:#b8cba9}select{display:block;margin-top:8px;background:#203f3b;border:1px solid #557464;color:#f3efd9;padding:12px;border-radius:10px;font:14px system-ui;max-width:100%}.score{text-align:center;flex-shrink:0}.score strong{font:36px Georgia;display:block;color:#f5c784}.score span{font-size:9px;letter-spacing:2px}#status{font-size:14px;min-height:40px;color:#d5dfc8;margin:22px 0 6px}#board{display:block;max-width:100%;height:auto;margin:0 auto 14px}#board [role=button]:focus{stroke:#fff;stroke-width:6;outline:none}.actions{display:flex;justify-content:center;gap:8px;flex-wrap:wrap}button{font:14px system-ui;color:#f3efd9;background:#294b43;border:1px solid #608071;padding:12px 18px;border-radius:10px;cursor:pointer}button:hover{background:#416653}button:disabled{opacity:.4;cursor:default}button:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid #f5c784;outline-offset:3px}.is-hidden{display:none}.rules{padding:0 8px;color:#bccbbb;line-height:1.65;font-size:14px}h2{font:26px Georgia;color:#edf3df}summary{cursor:pointer;color:#f5c784}footer{border-top:1px solid #355044;margin-top:28px;padding-top:20px;text-align:center;font-size:12px;line-height:1.8;color:#9bb49f}a{color:#dfcb9e}@media(max-width:450px){main{padding:22px 12px}.game{padding:16px 10px}.toolbar{gap:8px}select{max-width:240px;font-size:12px;padding:10px}.score strong{font-size:30px}}