:root{--bg:#0d1117;--panel:#151b23;--line:#2a3441;--text:#edf2f7;--muted:#94a3b8;--accent:#5eead4;--danger:#fb7185}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at top,#16253a,#0d1117 45%);color:var(--text);font:16px/1.6 system-ui,sans-serif;min-height:100vh}header,main{width:min(920px,calc(100% - 28px));margin:auto}header{display:flex;justify-content:space-between;align-items:center;padding:22px 0;color:var(--muted)}.brand{font-size:1.3rem;font-weight:800;color:var(--accent);text-decoration:none}.hero,.card,.room-head,.chat,.settings,.owner-key,.notice{border:1px solid var(--line);background:rgba(21,27,35,.92);border-radius:22px;padding:24px}.hero h1,.room-head h1{font-size:clamp(2.2rem,7vw,4.5rem);line-height:1.05;margin:.25em 0}.hero small,.room-head small{color:var(--accent);letter-spacing:.18em}.grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:18px}.card h2{margin-top:0}form{display:grid;gap:14px}label{display:grid;gap:6px;color:var(--muted)}input,select,textarea,button{font:inherit}input,select,textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:12px;background:#0d1117;color:var(--text)}button{padding:11px 16px;border:0;border-radius:12px;background:var(--accent);color:#06211d;font-weight:800;cursor:pointer}.privacy{text-align:center;color:var(--muted)}.notice{margin-bottom:16px}.room-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.room-head p{color:var(--muted)}.owner-key{margin-bottom:16px;border-color:#a16207}.owner-key code{display:block;overflow-wrap:anywhere;background:#0d1117;padding:12px;border-radius:10px}.settings{margin-bottom:16px}.settings form{grid-template-columns:1fr auto;align-items:end;margin-top:14px}.settings form+form{display:block}.danger{background:var(--danger);margin-top:14px}.chat{padding:0;overflow:hidden}.messages{height:min(60vh,620px);overflow:auto;padding:20px;display:grid;gap:12px}.msg{max-width:80%;padding:13px 15px;background:#202936;border-radius:4px 16px 16px 16px}.msg div{display:flex;gap:12px;color:var(--accent)}.msg time{color:var(--muted);font-size:.75rem}.msg p{margin:5px 0;overflow-wrap:anywhere}.msg img,.msg video{display:block;max-width:100%;max-height:320px;border-radius:10px;margin-bottom:8px}.msg a{color:#7dd3fc}.composer{display:grid;grid-template-columns:1fr auto;padding:14px;border-top:1px solid var(--line)}.composer textarea{min-height:54px;max-height:180px;resize:vertical}.upload{display:grid;grid-template-columns:1fr auto auto;align-items:center;padding:0 14px 14px}.upload span{color:var(--muted)}@media(max-width:640px){header span{display:none}.grid{grid-template-columns:1fr}.hero,.card,.room-head,.chat,.settings,.owner-key,.notice{border-radius:16px;padding:17px}.room-head{align-items:flex-start}.room-head h1{font-size:2.4rem}.messages{height:56vh;padding:12px}.msg{max-width:94%}.composer{grid-template-columns:1fr;padding:10px}.upload{grid-template-columns:1fr;padding:0 10px 10px}.settings form{grid-template-columns:1fr}}