:root{
  --bg:#0a0e13; --bg2:#0e141b; --surface:#141c25; --surface2:#1b2530; --line:#26323f;
  --fg:#e7edf3; --muted:#90a0b0; --accent:#22d3b5; --accent2:#17a5e6; --danger:#ef5a5a;
  --radius:14px; --ctrl:#1b2530;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%}
body{margin:0;background:radial-gradient(1200px 600px at 70% -10%,#12202b 0,var(--bg) 60%);color:var(--fg);
  font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
button{font:inherit;cursor:pointer}
input,select{font:inherit}
a{color:inherit;text-decoration:none}
.muted{color:var(--muted)} .small{font-size:13px}
.err{color:var(--danger);min-height:18px}

/* top bar */
.topbar{display:flex;align-items:center;gap:16px;padding:12px 18px;border-bottom:1px solid var(--line);
  background:rgba(10,14,19,.7);backdrop-filter:blur(8px);position:sticky;top:0;z-index:5}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:19px;letter-spacing:.3px}
.sov{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted);
  border:1px solid var(--line);border-radius:999px;padding:4px 11px}
.sov .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent)}
.whoami{margin-left:auto;display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted)}
.whoami .av{width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#04121a;font-weight:700;display:grid;place-items:center;font-size:13px}
.whoami a{color:var(--muted);border-bottom:1px dotted var(--line)}

.screen{min-height:calc(100vh - 57px)}

/* landing */
.hero{max-width:560px;margin:0 auto;padding:7vh 20px 40px;text-align:center}
.hero h1{font-size:44px;margin:14px 0 6px;letter-spacing:.5px}
.tagline{font-size:18px;color:#c6d2de;margin:0 0 26px}
.btn{background:var(--surface2);color:var(--fg);border:1px solid var(--line);border-radius:10px;padding:10px 16px}
.btn:hover{border-color:#3a4a5a}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#04121a;border:0;font-weight:700}
.btn.primary:hover{filter:brightness(1.05)}
.btn.big{padding:13px 24px;font-size:16px;border-radius:12px}
.points{list-style:none;padding:0;margin:34px auto 0;max-width:420px;text-align:left}
.points li{padding:9px 0 9px 28px;position:relative;color:#c6d2de;border-top:1px solid var(--line)}
.points li:before{content:"";position:absolute;left:4px;top:15px;width:9px;height:9px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 8px var(--accent)}

/* prejoin */
.prejoin{display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:center;padding:5vh 20px}
.preview-card{width:min(560px,92vw)}
.preview-video{position:relative;aspect-ratio:16/9;background:#05090d;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line)}
.preview-video video{width:100%;height:100%;object-fit:cover;transform:scaleX(-1)}
.preview-off{position:absolute;inset:0;display:grid;place-items:center;color:var(--muted)}
.levelbar{position:absolute;left:12px;right:12px;bottom:12px;height:6px;background:#0008;border-radius:4px;overflow:hidden}
.levelbar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .08s}
.preview-controls{display:flex;gap:10px;align-items:center;margin-top:12px;flex-wrap:wrap}
.dev{background:var(--surface);color:var(--fg);border:1px solid var(--line);border-radius:9px;padding:9px 10px;max-width:190px}
.prejoin-panel{width:min(360px,92vw)}
.prejoin-panel h2{margin:0 0 18px;font-size:24px}
.field{display:block;margin:0 0 16px;color:var(--muted);font-size:13px}
.field input{display:block;margin-top:6px;width:100%;padding:12px;background:var(--surface);color:var(--fg);
  border:1px solid var(--line);border-radius:10px}

/* icon buttons */
.icon{background:var(--ctrl);border:1px solid var(--line);color:var(--fg);border-radius:12px;width:46px;height:46px;
  display:inline-grid;place-items:center}
.icon:hover{border-color:#3a4a5a}
.icon[aria-pressed="false"]{background:#2a333d;color:var(--muted)}
.icon.off{background:var(--danger);border-color:var(--danger);color:#fff}
.icon.active{background:#16343a;border-color:var(--accent);color:var(--accent)}
.icon svg{width:21px;height:21px;display:block}
.icon.lg{flex-direction:column;width:64px;height:58px;gap:3px;border-radius:14px}
.icon.lg label{font-size:11px;cursor:pointer;color:inherit}
.icon.lg.danger{background:var(--danger);border-color:var(--danger);color:#fff}

/* call */
.call{display:grid;grid-template-columns:1fr auto;grid-template-rows:1fr auto;height:calc(100vh - 57px);gap:0}
.callmain{grid-row:1;grid-column:1;display:flex;flex-direction:column;min-height:0;padding:14px 14px 0}
.callhead{display:flex;align-items:center;gap:12px;margin-bottom:10px;color:var(--muted);font-size:14px}
.callhead .roomname{color:var(--fg);font-weight:600}
.callhead .q{margin-left:auto;display:flex;gap:2px;align-items:flex-end;height:16px}
.stage{flex:1;min-height:0;display:grid;gap:10px;grid-auto-rows:1fr}
.tile{position:relative;background:#05090d;border-radius:12px;overflow:hidden;border:1px solid var(--line);min-height:0}
.tile video{width:100%;height:100%;object-fit:cover}
.tile.me video{transform:scaleX(-1)}
.tile.screen video{object-fit:contain;background:#000}
.tile .nm{position:absolute;left:8px;bottom:8px;background:#000a;padding:3px 9px;border-radius:8px;font-size:13px;display:flex;gap:6px;align-items:center}
.tile .muteind{color:var(--danger)}
.tile.speaking{outline:3px solid var(--accent);outline-offset:-3px}
.tile .avatar{position:absolute;inset:0;display:grid;place-items:center}
.tile .avatar b{width:76px;height:76px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#04121a;display:grid;place-items:center;font-size:30px;font-weight:700}
.strip{display:flex;gap:10px;overflow-x:auto;padding:10px 0 12px;min-height:0}
.strip .tile{width:200px;aspect-ratio:16/9;flex:0 0 auto}
.strip:empty{display:none}

/* side panel */
.side{grid-row:1/3;grid-column:2;width:320px;background:var(--bg2);border-left:1px solid var(--line);display:flex;flex-direction:column}
.side-tabs{display:flex;align-items:center;border-bottom:1px solid var(--line)}
.side-tab{background:none;border:0;color:var(--muted);padding:13px 15px;border-bottom:2px solid transparent}
.side-tab.active{color:var(--fg);border-bottom-color:var(--accent)}
.side-x{margin-left:auto;background:none;border:0;color:var(--muted);font-size:22px;padding:0 14px}
.pane{flex:1;min-height:0;display:flex;flex-direction:column}
.chatlog{flex:1;overflow:auto;padding:12px;display:flex;flex-direction:column;gap:10px}
.chatlog .m .who{font-size:12px;color:var(--accent);font-weight:600}
.chatlog .m .tx{background:var(--surface);padding:7px 11px;border-radius:10px;margin-top:2px;word-wrap:break-word}
.chatlog .sys{color:var(--muted);font-size:12.5px;text-align:center}
.chatform{display:flex;gap:8px;padding:10px;border-top:1px solid var(--line)}
.chatform input{flex:1;padding:10px;background:var(--surface);color:var(--fg);border:1px solid var(--line);border-radius:9px}
.peoplelist{list-style:none;margin:0;padding:8px;overflow:auto}
.peoplelist li{display:flex;align-items:center;gap:10px;padding:9px 8px;border-radius:9px}
.peoplelist li:hover{background:var(--surface)}
.peoplelist .av{width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent2));
  color:#04121a;font-weight:700;display:grid;place-items:center;font-size:13px}
.peoplelist .tag{margin-left:auto;font-size:11px;color:var(--accent);border:1px solid var(--line);border-radius:999px;padding:1px 8px}

/* controls */
.controls{grid-row:2;grid-column:1;display:flex;gap:10px;justify-content:center;align-items:center;padding:14px;
  background:rgba(8,12,17,.85);backdrop-filter:blur(6px)}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:90px;background:var(--surface2);border:1px solid var(--line);
  padding:9px 16px;border-radius:10px;z-index:10}

/* modal */
.modal{position:fixed;inset:0;background:#000a;display:grid;place-items:center;z-index:20;padding:18px}
.modal-box{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;width:min(440px,94vw)}
.modal-box h3{margin:0 0 6px}
.copyrow{display:flex;gap:8px;margin:14px 0}
.copyrow input{flex:1;padding:11px;background:var(--bg2);color:var(--fg);border:1px solid var(--line);border-radius:9px}
.sov-note{border-left:2px solid var(--accent);padding-left:10px;margin-top:14px}
.modal-actions{display:flex;justify-content:flex-end;margin-top:12px}

@media (max-width:760px){
  .call{grid-template-columns:1fr}
  .side{grid-row:auto;grid-column:1;width:auto;height:46vh;border-left:0;border-top:1px solid var(--line)}
  .icon.lg label{display:none}.icon.lg{width:52px;height:52px}
  .hero h1{font-size:36px}
}