:root{--bg:#0f1115;--bg-elev:#171a21;--bg-tile:#0b0d11;--border:#262b36;--text:#e7eaf0;--text-dim:#9aa4b2;--brand:#5b6cff;--brand-hover:#4757ff;--danger:#ef4444;--danger-hover:#dc2626;--ok:#22c55e}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif}
button{cursor:pointer;font-family:inherit}
.home{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}
.card{width:100%;max-width:440px;background:var(--bg-elev);border:1px solid var(--border);border-radius:16px;padding:32px;box-shadow:0 20px 60px rgba(0,0,0,.45)}
.brand{display:flex;align-items:center;gap:10px;font-size:24px;font-weight:700}
.brand-dot{width:14px;height:14px;border-radius:50%;background:var(--brand);box-shadow:0 0 16px var(--brand)}
.subtitle{color:var(--text-dim);font-size:14px;margin:8px 0 24px}
label{display:block;font-size:13px;color:var(--text-dim);margin:16px 0 6px}
input{width:100%;padding:12px 14px;background:var(--bg);border:1px solid var(--border);border-radius:10px;color:var(--text);font-size:15px;outline:none}
input:focus{border-color:var(--brand)}
.row{display:flex;gap:10px}.row input{flex:1}
.btn-primary{width:100%;margin-top:20px;border:none;border-radius:10px;font-size:15px;font-weight:600;padding:13px 16px;background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-hover)}
.btn-ghost{border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--text);padding:12px 14px;font-weight:600;white-space:nowrap}
.btn-ghost:hover{border-color:var(--brand)}
.hint{margin-top:18px;font-size:12px;color:var(--text-dim);line-height:1.5}
.error{margin-top:14px;color:var(--danger);font-size:13px;min-height:16px}
.room{display:flex;flex-direction:column;height:100vh}
.topbar{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--bg-elev);border-bottom:1px solid var(--border)}
.topbar .brand{font-size:16px}.topbar .room-name{color:var(--text-dim);font-size:14px}.topbar .spacer{flex:1}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--text-dim);background:var(--bg);border:1px solid var(--border);padding:6px 10px;border-radius:999px}
.pill b{color:var(--text)}
.stage{flex:1;display:flex;overflow:hidden}
.grid{flex:1;display:grid;gap:8px;padding:8px;grid-auto-rows:1fr;align-content:stretch}
.tile{position:relative;background:var(--bg-tile);border:1px solid var(--border);border-radius:12px;overflow:hidden;display:flex;align-items:center;justify-content:center;min-height:120px}
.tile video{width:100%;height:100%;object-fit:cover;background:#000}
.tile.screen video{object-fit:contain;background:#000}
.tile .avatar{width:76px;height:76px;border-radius:50%;background:var(--brand);display:flex;align-items:center;justify-content:center;font-size:30px;font-weight:700;color:#fff}
.tile .name{position:absolute;left:8px;bottom:8px;font-size:12px;color:#fff;background:rgba(0,0,0,.55);padding:3px 8px;border-radius:6px;display:flex;align-items:center;gap:6px}
.tile .name .mic-off{color:var(--danger)}
.tile.speaking{border-color:var(--ok);box-shadow:0 0 0 2px var(--ok) inset}
.panel{width:320px;background:var(--bg-elev);border-left:1px solid var(--border);display:none;flex-direction:column}
.panel.open{display:flex}
.panel-tabs{display:flex;border-bottom:1px solid var(--border)}
.panel-tabs button{flex:1;background:none;border:none;color:var(--text-dim);padding:12px;font-weight:600;border-bottom:2px solid transparent}
.panel-tabs button.active{color:var(--text);border-bottom-color:var(--brand)}
.panel-body{flex:1;overflow-y:auto;padding:12px}
.panel-foot{padding:10px;border-top:1px solid var(--border);display:flex;gap:8px}
.panel-foot input{flex:1}
.msg{margin-bottom:12px;font-size:14px}
.msg .who{font-size:12px;color:var(--brand);font-weight:600;margin-bottom:2px}
.msg .body{color:var(--text);word-wrap:break-word}
.msg.system .body{color:var(--text-dim);font-style:italic}
.plist-item{display:flex;align-items:center;gap:10px;padding:8px 4px;font-size:14px}
.plist-item .dot{width:28px;height:28px;border-radius:50%;background:var(--brand);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff}
.controls{display:flex;align-items:center;justify-content:center;gap:10px;padding:12px;background:var(--bg-elev);border-top:1px solid var(--border)}
.ctrl{width:52px;height:52px;border-radius:14px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:20px;display:flex;align-items:center;justify-content:center}
.ctrl:hover{border-color:var(--brand)}
.ctrl.active{background:var(--brand);border-color:var(--brand);color:#fff}
.ctrl.off{background:#2a1416;border-color:var(--danger);color:var(--danger)}
.ctrl.leave{background:var(--danger);border-color:var(--danger);color:#fff;width:60px}
.ctrl.leave:hover{background:var(--danger-hover)}
.ctrl-wrap{display:flex;flex-direction:column;align-items:center;gap:4px;position:relative}
.ctrl-wrap span{font-size:10px;color:var(--text-dim)}
.badge{position:absolute;top:-4px;right:-4px;background:var(--danger);color:#fff;font-size:10px;min-width:16px;height:16px;border-radius:999px;display:none;align-items:center;justify-content:center;padding:0 4px}
.badge.show{display:flex}
.toast{position:fixed;bottom:90px;left:50%;transform:translateX(-50%);background:var(--ok);color:#06210f;padding:10px 16px;border-radius:10px;font-weight:600;opacity:0;transition:opacity .2s;pointer-events:none;font-size:14px}
.toast.show{opacity:1}
@media(max-width:640px){.panel{position:fixed;inset:48px 0 84px 0;width:auto;z-index:20}.ctrl-wrap span{display:none}}