:root{
  --bg:#0b1117; --card:#131b24; --line:#223040; --ink:#eef3f8; --muted:#8fa2b5;
  --accent:#4f8cff; --accent-ink:#ffffff; --good:#39c97e; --fair:#f0b44c; --poor:#f06a5c; --end:#e5484d;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;-webkit-font-smoothing:antialiased;min-height:100%}
body{display:flex;flex-direction:column;min-height:100vh;min-height:100dvh}
[hidden]{display:none!important}
a{color:var(--accent)}

.top{display:flex;align-items:center;justify-content:space-between;padding:.9rem 1.25rem;padding-top:max(.9rem,env(safe-area-inset-top))}
.brand{font-weight:700;letter-spacing:.01em;color:var(--ink);text-decoration:none;font-size:1.05rem}
.brand span{color:var(--accent)}
.doc{font-size:.85rem;color:var(--muted);text-decoration:none}
.doc:hover{color:var(--ink)}

main{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:1rem;width:100%}
.card{width:100%;max-width:30rem;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:1.75rem 1.5rem}
.card h1{margin:0 0 .5rem;font-size:1.5rem;line-height:1.25}
.card p{margin:0 0 1.1rem;color:var(--muted)}
.card .fine{font-size:.8rem;margin:1.1rem 0 0}
.notice{color:var(--fair);font-weight:500}
.form{display:flex;flex-direction:column;gap:.75rem}
.form label{display:flex;flex-direction:column;gap:.3rem;font-size:.85rem;color:var(--muted)}
input{font:inherit;color:var(--ink);background:#0b1117;border:1px solid var(--line);border-radius:8px;padding:.6em .75em;width:100%}
input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}
button,.btn{font:inherit;font-weight:500;color:var(--ink);background:#1b2633;border:1px solid var(--line);border-radius:8px;padding:.65em 1.1em;cursor:pointer;text-decoration:none;text-align:center;display:inline-block}
button:hover,.btn:hover{border-color:var(--accent)}
button.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
button.primary:hover{filter:brightness(1.08)}
button:disabled{opacity:.5;cursor:default}

/* call screen */
.call{width:100%;max-width:1100px;display:flex;flex-direction:column;gap:.75rem}
.stage{position:relative;width:100%;aspect-ratio:16/9;max-height:calc(100dvh - 11rem);background:#000;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
#remote{position:absolute;inset:0;width:100%;height:100%;aspect-ratio:auto;background:#000}
#self{position:absolute;right:.75rem;bottom:.75rem;width:clamp(96px,22%,240px);aspect-ratio:4/3;border-radius:10px;border:1px solid rgba(255,255,255,.25);box-shadow:0 6px 24px rgba(0,0,0,.45);background:#000;z-index:2}
.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(11,17,23,.72);backdrop-filter:blur(6px);z-index:3;padding:1rem}
.overlay .box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:1.5rem;max-width:26rem;width:100%;text-align:center}
.overlay h2{margin:.5rem 0 .25rem;font-size:1.15rem}
.overlay p{margin:0 0 .9rem;color:var(--muted);font-size:.92rem}
.linkrow{display:flex;gap:.5rem}
.linkrow input{flex:1;min-width:0;font-size:.85rem;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.linkrow button{white-space:nowrap}
.spinner{width:28px;height:28px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;margin:0 auto;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.bar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:.75rem;padding:.25rem .25rem max(.25rem,env(safe-area-inset-bottom))}
.bar .left{display:flex;align-items:center;gap:.75rem;min-width:0}
.bar .right{display:flex;justify-content:flex-end;min-width:0}
.peer{font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.status{font-size:.8rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.quality{display:inline-flex;align-items:center;gap:.4rem;font-size:.8rem;color:var(--muted);white-space:nowrap}
.quality i{width:8px;height:8px;border-radius:50%;background:var(--good);display:inline-block}
.quality.fair i{background:var(--fair)} .quality.poor i{background:var(--poor)}
.quality b{font-weight:500;color:var(--ink);font-variant-numeric:tabular-nums}
.controls{display:flex;gap:.6rem;justify-content:center}
.round{width:52px;height:52px;border-radius:50%;padding:0;display:inline-flex;align-items:center;justify-content:center;background:#1b2633}
.round svg{width:22px;height:22px;fill:currentColor}
.round[aria-pressed="true"]{background:#fff;color:#0b1117;border-color:#fff}
.round.end{background:var(--end);border-color:var(--end);color:#fff}
.round.end:hover{filter:brightness(1.1)}

.foot{padding:.75rem 1.25rem;padding-bottom:max(.75rem,env(safe-area-inset-bottom));font-size:.78rem;color:var(--muted);text-align:center}

@media (max-width:640px){
  .card{padding:1.4rem 1.1rem}
  .stage{border-radius:10px;aspect-ratio:auto;height:calc(100dvh - 12.5rem);max-height:none}
  #self{width:28%;aspect-ratio:3/4}
  .bar{grid-template-columns:1fr auto;gap:.5rem}
  .bar .right{display:none}
  .foot{display:none}
}