:root{color-scheme:dark;--bg:#171b22;--surface:#202630;--line:#343e4c;--text:#e8edf5;--muted:#a1adbe;--accent:#86acff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.5 system-ui,-apple-system,"Microsoft YaHei UI",sans-serif}button,input{font:inherit}button{border:1px solid transparent;border-radius:4px;color:inherit;background:transparent;padding:7px 10px;cursor:pointer;touch-action:manipulation}button:hover{background:#2c3643}button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}button:disabled{opacity:.45;cursor:default}.primary{background:#426ed5;color:white}.primary:hover{background:#507ee7}input:not([type=checkbox]):not([type=range]){background:var(--bg);border:1px solid var(--line);border-radius:4px;color:inherit;padding:9px 10px;min-width:0}input[type=checkbox],input[type=range]{accent-color:var(--accent)}input[type=checkbox]{width:16px;height:16px;vertical-align:-3px;margin-right:7px}header{height:52px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;padding:0 max(16px,env(safe-area-inset-left))}header strong{font-size:15px}#connection{margin-left:auto;font-size:12px;color:var(--muted)}main{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px;max-width:1400px;margin:auto;padding:24px}#picture{position:relative;background:#090b0f;aspect-ratio:16/9;overflow:hidden;border-radius:4px}video{width:100%;height:100%;display:block;object-fit:contain}#cover{position:absolute;inset:0;background:#171b22e8;display:grid;place-items:center}#cover[hidden]{display:none}#joinForm{width:min(320px,90%)}h1,h2,p{margin:0}#joinForm h1{font-size:19px;font-weight:600;margin-bottom:8px}#joinForm p{color:var(--muted);font-size:13px;margin-bottom:18px}#joinForm label{display:block;font-size:12px;margin-bottom:5px}#nickname{width:100%;margin-bottom:12px}#joinButton{width:100%}#joinHint{margin-top:12px;font-size:12px}.timeline{display:flex;align-items:center;gap:12px;margin-top:12px;font-size:12px;font-variant-numeric:tabular-nums}#seek{flex:1;min-width:0;height:24px;cursor:pointer;margin:0}.controls{display:flex;align-items:center;gap:3px;margin-top:3px}button svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.6;vertical-align:middle}#play svg{fill:currentColor;stroke:none}#play span{margin-left:5px}.spacer{flex:1}.controls label{white-space:nowrap;font-size:12px;margin-right:5px}.under{display:flex;gap:12px;justify-content:space-between;border-top:1px solid var(--line);padding-top:14px;margin-top:9px}.under h1{font-size:14px;font-weight:500;overflow-wrap:anywhere}.under p{font-size:12px;margin-top:5px;color:var(--muted)}.ready{flex-shrink:0;font-size:13px;padding-top:2px}.muted{color:var(--muted)}aside{display:flex;flex-direction:column;min-height:450px;max-height:calc(100dvh - 124px);border-left:1px solid var(--line);padding-left:24px}.asideHead{display:flex;align-items:center;justify-content:space-between}h2{font-size:13px;font-weight:500}.asideHead button{font-size:20px;padding:0 8px}#members{list-style:none;padding:0;margin:9px 0 18px;max-height:100px;overflow:auto;font-size:12px}#members li{display:flex;gap:8px;justify-content:space-between;margin:6px 0}#members li span:last-child{color:var(--muted)}#members .prepared span:last-child{color:var(--accent)}.chatTitle{padding-top:13px;border-top:1px solid var(--line)}#messages{list-style:none;padding:0;margin:12px 0;overflow:auto;flex:1;min-height:140px}#messages li{margin-bottom:16px;overflow-wrap:anywhere}#messages small{display:block;color:var(--muted);font-size:12px;margin-bottom:4px}#messages p{font-size:13px}#chatForm{display:flex;gap:6px}#chat{flex:1;width:0}#send{background:#293240;font-size:13px}.tip{font-size:12px;margin-top:9px}footer{color:var(--muted);font-size:12px;text-align:center;padding:0 16px 18px}.quiet{color:var(--accent);font-size:12px;padding-left:0;margin-top:5px}.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}#danmaku{position:absolute;inset:0;pointer-events:none;overflow:hidden}.comment{position:absolute;left:100%;white-space:nowrap;font-size:17px;color:#edf3ff;text-shadow:0 1px 2px #000;animation:danmaku 8s linear forwards}@keyframes danmaku{to{transform:translateX(var(--travel))}}@media(prefers-reduced-motion:reduce){.comment{display:none}}@media(max-width:800px){main{grid-template-columns:1fr;padding:14px;gap:20px}aside{padding-left:0;border-left:0;max-height:440px;min-height:340px}header{height:48px}.under{flex-direction:column;gap:10px}.ready{align-self:flex-start}.controls{gap:0}.controls button{padding:8px}#pip{display:none}footer{padding-bottom:max(18px,env(safe-area-inset-bottom))}}@media(max-width:360px){.controls #back span,#play span{display:none}header .muted{font-size:12px}}#picture:fullscreen{border-radius:0;aspect-ratio:auto;background:black}#picture:fullscreen video{object-fit:contain}

@media(max-width:800px){#nickname,#chat{font-size:16px}.controls button{min-width:38px;min-height:40px}}
#messages:empty:before{content:"房间消息会显示在这里";color:var(--muted);font-size:12px}

#sourcePanel{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:12px}#sourcePanel p{flex-basis:100%;font-size:12px;overflow-wrap:anywhere}.fileButton{display:inline-block;padding:6px 10px;border:1px solid var(--line);border-radius:4px;font-size:13px;cursor:pointer}.fileButton:hover{background:#2c3643}#sourcePanel .quiet{margin:0;padding:6px 10px}#sourcePanel[hidden]{display:none}

/* Respect hidden state for all source controls. */
[hidden]{display:none!important}

/* Fluent appearance: device-local preference; does not change media or room. */
:root,:root[data-theme=light]{color-scheme:light;--bg:#F6F7F9;--surface:#FFFFFF;--line:#E1E5EB;--text:#202124;--muted:#636B77;--accent:#2563EB;--selected:#EAF1FF;--hover:#EFF2F7;--on-accent:#FFFFFF}
:root[data-theme=dark]{color-scheme:dark;--bg:#161A20;--surface:#20262F;--line:#343C47;--text:#E7EBF2;--muted:#A6AFBD;--accent:#7EA6FF;--selected:#26344A;--hover:#2A3443;--on-accent:#151A23}
header{background:var(--surface);flex-wrap:wrap;height:auto;min-height:48px;padding-top:6px;padding-bottom:6px}
button:hover,.fileButton:hover{background:var(--hover)}.primary,.primary:hover{background:var(--accent);color:var(--on-accent)}#send{background:var(--selected);color:var(--text)}
#cover{background:var(--surface)}#messages p{font-size:14px}#messages small,.tip,footer{font-size:12px}
.appearance-control{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);margin-left:8px}
.appearance-control select{font:inherit;min-height:28px;padding:3px 6px;border:1px solid var(--line);border-radius:4px;background:var(--surface);color:var(--text)}
.appearance-control select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media(max-width:600px){header>.muted{display:none}.appearance-control{font-size:0;margin-left:2px}.appearance-control select{font-size:12px}.controls{flex-wrap:wrap}.under{gap:12px}}
@media(pointer:coarse){.controls button,.appearance-control select{min-height:44px}.appearance-control select{font-size:16px}}