* { box-sizing: border-box; }
body { margin:0; font:16px/1.5 system-ui, -apple-system, Segoe UI, Roboto; color:#e5e7eb;
       background: radial-gradient(1000px 700px at 20% 10%, #101735 0%, #0b1020 55%, #070a16 100%); }
.topbar { position:sticky; top:0; z-index:10; display:flex; justify-content:space-between; align-items:center;
          padding:10px 16px; background:#0b1020cc; border-bottom:1px solid #ffffff14; backdrop-filter:blur(6px); }
.brand { font-weight:800; letter-spacing:.3px; color:#9edcff; }
.nav a { color:#cbd5e1; margin-left:12px; text-decoration:none; }
.view { display:none; padding:20px; }
.view.active { display:block; }
.cards { display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:16px; margin-top:20px; }
.card { border:1px solid #ffffff22; background:#0f1b33; color:#e5e7eb; border-radius:12px; padding:18px; cursor:pointer; }
.card.primary { background: linear-gradient(180deg, #0e2741cc, #0d1f36cc); border-color:#5eead41a; }
.btn { border:1px solid #ffffff22; background:#13233e; color:#e5e7eb; padding:8px 12px; border-radius:10px; cursor:pointer; }
.btn.primary { background:#144a6a; }
.btn.wa { background:#128C7E; border-color:#0e6f64; }
.lobby-actions { display:flex; gap:8px; align-items:center; margin:10px 0 14px; flex-wrap:wrap; }
.room-list { list-style:none; padding:0; margin:0; }
.room-list li { display:flex; justify-content:space-between; align-items:center; padding:10px 12px; border:1px solid #ffffff1a; border-radius:10px; margin-bottom:8px; background:#0f1b33; cursor:pointer; }
.muted { color:#9ca3af; }
.statusbar { display:flex; gap:18px; align-items:center; flex-wrap:wrap; margin-bottom:12px; }
.badge { padding:2px 8px; border-radius:999px; background:#3b4252; }
.boards { display:grid; grid-template-columns: 1fr 1fr; gap:16px; }
.col h3 { margin:10px 0 8px; color:#cfe5ff; font-weight:600; }
.grid { display:grid; grid-template-columns: repeat(10, 28px); grid-template-rows: repeat(10, 28px); gap:2px;
        background:#0a1224; padding:8px; border-radius:12px; border:1px solid #ffffff12; }
.cell { width:28px; height:28px; border-radius:5px; background:linear-gradient(180deg, #0f2244, #0e1b36); 
        box-shadow: inset 0 -1px 0 0 #0007; display:flex; align-items:center; justify-content:center; font-size:14px; }
.cell.ship { background:#1c2c3f; box-shadow: inset 0 0 0 1px #6ee7b733; }
.cell.hit { background:#163537; box-shadow: inset 0 0 0 1px #34d39999; }
.cell.miss::after{ content:""; width:50%; height:50%; border-radius:50%; background:radial-gradient(circle,#a5b4fc 0, #94a3b8 60%, transparent 65%); }
.log { margin-top:16px; max-height:260px; overflow:auto; border:1px solid #ffffff1a; padding:10px; border-radius:10px; background:#0f1b33; }
@media (max-width: 860px) {
  .boards { grid-template-columns: 1fr; }
  .grid { grid-template-columns: repeat(10, 26px); grid-template-rows: repeat(10, 26px); }
  .nav a { display:none; }
}