:root{
  --bg:#0b1020;
  --panel:#111933cc;
  --ink:#e5e7eb;
  --accent:#7dd3fc;
  --good:#34d399;
  --bad:#f87171;
}
*{box-sizing:border-box}
body{margin:0;background:radial-gradient(1200px 800px at 20% 10%, #101735 0%, #0b1020 55%, #070a16 100%);color:var(--ink);font:16px/1.4 system-ui,-apple-system,Segoe UI,Roboto}
.hud{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;padding:.6rem 1rem;background:linear-gradient(180deg,#0b1020cc,#0b102000);backdrop-filter:blur(6px);border-bottom:1px solid #ffffff22}
.title{display:flex;align-items:center;gap:.6rem;font-weight:700}
.dot{width:10px;height:10px;border-radius:50%}
.dot.offline{background:#64748b}
.dot.online{background:var(--good);box-shadow:0 0 10px var(--good)}
.presence{margin-left:.5rem;opacity:.8}
.nav .btn{margin-left:.4rem}
.container{max-width:1100px;margin:0 auto;padding:1rem}
.btn{appearance:none;border:1px solid #ffffff22;color:var(--ink);background:var(--panel);padding:.5rem .8rem;border-radius:.6rem;cursor:pointer}
.btn.primary{background:linear-gradient(180deg,#0e2741cc,#0d1f36cc);box-shadow:0 0 0 1px #6ee7b7aa inset}
.btn.outline{background:transparent}
.room-list{list-style:none;margin:.6rem 0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:.6rem}
.room-item{display:flex;align-items:center;justify-content:space-between;padding:.6rem;border:1px solid #ffffff22;background:#0b1730;border-radius:.6rem}
.room-item .meta{opacity:.7;margin-left:.5rem}
.room-item .actions .btn{margin-left:.35rem}
.game-head{display:flex;justify-content:space-between;align-items:center;margin:1rem 0}
.boards{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.board{min-height:200px;border:1px dashed #1e293b;border-radius:.6rem;display:grid;place-items:center;opacity:.8}
.chat{border:1px solid #ffffff22;background:#0b1730;border-radius:.6rem;padding:.6rem;max-width:560px;margin-top:1rem}
.chat-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:.5rem}
.chat-log{height:220px;overflow:auto;border:1px solid #ffffff22;border-radius:.4rem;padding:.5rem;background:#0c1a34}
.chat-msg{margin:.25rem 0}
.chat-msg .me{color:#93c5fd}
.chat-form{display:flex;gap:.5rem;margin-top:.5rem}
.chat-form input{flex:1;border-radius:.4rem;border:1px solid #334155;background:#0a1628;color:var(--ink);padding:.5rem .6rem}
.badge{font-size:.8rem;padding:.15rem .5rem;border-radius:.5rem;border:1px solid #ffffff22;background:#0a213d}
@media (max-width: 900px){
  .boards{grid-template-columns:1fr}
}