:root{color-scheme:light dark;--bg:#f3f3f3;--panel:#fff;--panel-soft:rgba(255,255,255,.78);--text:#050505;--muted:#747781;--line:#dedede;--shadow:0 18px 45px rgba(20,24,32,.1);--x:#ff406d;--blue:#4a93ff;--sea:#eaf3ff;--ship:#22252d;--hit:#ff406d;--miss:#4a93ff}
[data-theme=dark]{--bg:#13151b;--panel:#1c2029;--panel-soft:rgba(28,32,41,.86);--text:#f6f7fb;--muted:#a0a6b5;--line:#323846;--sea:#202a3a;--ship:#f8fafc;--shadow:0 22px 55px rgba(0,0,0,.34)}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#13151b;--panel:#1c2029;--panel-soft:rgba(28,32,41,.86);--text:#f6f7fb;--muted:#a0a6b5;--line:#323846;--sea:#202a3a;--ship:#f8fafc;--shadow:0 22px 55px rgba(0,0,0,.34)}}
*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:radial-gradient(circle at top,rgba(255,64,109,.08),transparent 34rem),var(--bg)}button,input{font:inherit}button{border:0;cursor:pointer}.app-shell{width:min(100% - 28px,1120px);min-height:100vh;margin:0 auto;padding:20px 0 22px;display:flex;flex-direction:column;align-items:center}.brand{display:flex;align-items:center;justify-content:center;gap:16px;margin-bottom:22px}.brand h1{margin:0;font-size:clamp(2.1rem,7vw,3.15rem);line-height:1;font-weight:900}.brand-icon{width:clamp(3rem,10vw,4rem);height:clamp(3rem,10vw,4rem);display:grid;place-items:center;color:var(--x);filter:drop-shadow(0 8px 10px rgba(255,64,109,.25))}.brand-icon svg{width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:2.3;stroke-linecap:round;stroke-linejoin:round}.panel,.game-view{width:100%}.menu-panel{width:min(100%,620px);padding:22px;border:1px solid var(--line);border-radius:18px;background:var(--panel-soft);box-shadow:var(--shadow)}.menu-actions{display:grid;gap:14px}.primary-btn,.join-btn,.pill-btn,.copy-btn,.back-home-btn{min-height:44px;border-radius:11px;color:var(--text);background:var(--panel);box-shadow:0 8px 22px rgba(15,18,25,.08);font-weight:850}.primary-btn,.join-btn,.primary-lite{color:#fff;background:linear-gradient(135deg,var(--x),#ff7a95)}.primary-btn{min-height:52px}.join-card{display:grid;gap:7px}.join-card label,.room-strip span{color:var(--muted);font-size:.88rem}.join-row{display:grid;grid-template-columns:1fr auto;gap:10px}input{height:46px;border:1px solid var(--line);border-radius:10px;padding:0 14px;color:var(--text);background:var(--panel);text-transform:uppercase;letter-spacing:.08em}.hint,.error-text,.sync-text,.footer,.placement-text{text-align:center}.hint{margin:16px 0 0;color:var(--muted)}.error-text{min-height:22px;margin:12px 0 0;color:var(--x);font-weight:800}.back-home-btn{width:fit-content;margin:18px auto 0;padding:0 16px;display:flex;align-items:center;justify-content:center;text-decoration:none}.top-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:8px}.pill-btn{padding:0 18px}.room-strip{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:10px;width:min(100%,640px);margin:0 auto 10px;padding:10px 12px;border:1px solid var(--line);border-radius:14px;background:var(--panel-soft)}.room-strip div{display:grid;text-align:center}.copy-btn{padding:0 14px}.placement-text{min-height:24px;margin:8px 0;color:var(--muted);font-weight:800}.boards{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}.boards h2{margin:0 0 10px;text-align:center;font-size:1.1rem}.sea-board{display:grid;grid-template-columns:repeat(10,1fr);width:min(100%,500px);aspect-ratio:1;border:4px solid color-mix(in srgb,var(--text) 35%,var(--blue));border-radius:16px;overflow:hidden;background:var(--line);box-shadow:0 16px 34px rgba(15,18,25,.14)}.sea-cell{border:1px solid color-mix(in srgb,var(--line) 70%,transparent);background:var(--sea);position:relative}.sea-cell.ship{background:color-mix(in srgb,var(--ship) 22%,var(--sea))}.sea-cell.pending{outline:3px solid var(--x);outline-offset:-3px}.sea-cell.hit::after,.sea-cell.miss::after{content:"";position:absolute;inset:28%;border-radius:999px}.sea-cell.hit::after{background:var(--hit)}.sea-cell.miss::after{background:var(--miss)}.target-board .sea-cell:not(.hit):not(.miss):hover{outline:3px solid var(--x);outline-offset:-3px}.status-text{min-height:36px;margin:18px 0 4px;text-align:center;font-size:clamp(1.25rem,4vw,1.65rem)}.sync-text{min-height:22px;margin:0;color:var(--muted)}.footer{margin-top:auto;padding-top:24px;color:var(--muted)}.hidden{display:none!important}@media(max-width:760px){.boards{grid-template-columns:1fr}.sea-board{width:min(100%,460px);margin:0 auto}.room-strip,.join-row{grid-template-columns:1fr}.copy-btn,.join-btn,.back-home-btn{width:100%}}