:root{color-scheme:dark;--ink:#f4f7f4;--muted:#a8b6b2;--night:#071014;--panel:#101c20;--line:#29434b;--lime:#c9f45b;--mint:#62d8bd;--water:#123a4a;--hit:#ff7668;--display:"Arial Black","Helvetica Neue",Arial,sans-serif;--body:Inter,system-ui,sans-serif}*{box-sizing:border-box}html{min-width:280px;background:var(--night)}body{margin:0;color:var(--ink);background:radial-gradient(circle at 80% 4%,rgba(71,181,190,.15),transparent 32rem),var(--night);font-family:var(--body);line-height:1.5}a{color:inherit}button{font:inherit}.site-header,main,footer{width:min(1100px,calc(100% - 36px));margin:auto}.site-header{display:flex;align-items:center;justify-content:space-between;min-height:78px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font-weight:850;text-decoration:none}.brand span{display:grid;width:34px;aspect-ratio:1;place-items:center;color:var(--night);background:var(--lime);border-radius:9px;font-family:var(--display)}.site-header p{margin:0;color:var(--muted);font-size:.7rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.intro{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:end;padding:50px 0 30px}.intro>p{margin:0;color:var(--muted)}.eyebrow{margin:0 0 8px;color:var(--mint);font-size:.72rem;font-weight:850;letter-spacing:.16em;text-transform:uppercase}h1,h2,p{margin-top:0}h1{margin-bottom:0;font:clamp(3.5rem,8vw,6rem)/.84 var(--display);letter-spacing:-.07em}.game-shell{padding:14px;background:var(--panel);border:1px solid var(--line);border-radius:18px}.toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.toolbar p{flex:1 1 100%;min-height:24px;margin:0 0 4px;color:var(--muted);font-size:.78rem;text-align:center}.toolbar button{min-height:40px;padding:0 12px;color:var(--ink);background:#0c171b;border:1px solid #47626a;border-radius:8px;font-size:.72rem;font-weight:850;cursor:pointer}.toolbar button:hover,.toolbar button:focus-visible{color:var(--night);background:var(--lime)}#start{margin-left:auto;color:var(--night);background:var(--lime);border-color:var(--lime)}.boards{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:14px}.board-title{display:flex;justify-content:space-between;margin-bottom:7px;color:var(--muted);font-size:.68rem;font-weight:850;text-transform:uppercase}.board-title b{color:var(--mint)}.board{display:grid;grid-template-columns:repeat(10,1fr);aspect-ratio:1;overflow:hidden;background:#0a222d;border:5px solid #294f5c;border-radius:10px;touch-action:manipulation}.cell{position:relative;display:grid;padding:0;place-items:center;background:var(--water);border:1px solid #28566a;cursor:pointer}.cell.ship::before{content:"";width:66%;aspect-ratio:1;background:#8ca6a9;border-radius:35%}.cell.miss::after{content:"";width:18%;aspect-ratio:1;background:#acd7df;border-radius:50%}.cell.hit::after{content:"×";color:var(--hit);font:900 clamp(.75rem,2vw,1.3rem)/1 var(--display)}.cell.sunk{background:#3e2224}.enemy .cell:hover:not(.shot),.enemy .cell:focus-visible:not(.shot){background:#1a5367}.cell:disabled{cursor:default}.rules{display:grid;grid-template-columns:1fr 1.15fr;gap:65px;padding:70px 0}.rules h2{font:clamp(2rem,5vw,3.5rem)/.95 var(--display);letter-spacing:-.05em}.rules p{color:var(--muted)}footer{display:flex;justify-content:space-between;padding:24px 0 38px;border-top:1px solid var(--line);color:var(--muted);font-size:.78rem}footer a{font-weight:800;text-decoration:none}footer p{margin:0}@media(max-width:700px){.intro{display:block;padding:36px 0 24px}.intro>p{margin-top:16px}.boards{grid-template-columns:1fr;gap:22px}.toolbar button{flex:1 1 42%}#start{margin-left:0}.board{border-width:4px}.rules{display:block;padding:48px 0}.rules>div+div{margin-top:22px}footer{display:block}footer p{margin-top:8px}}