/* Voice Room · appearance layer */
:root{color-scheme:dark;--bg:#0c1220;--surface:#141e30;--surface-2:#101a2b;--surface-3:#22304a;--line:#30405a;--line-soft:#24324a;--fg:#edf2fc;--fg-dim:#b0bed3;--fg-mute:#8798b2;--accent:#799aff;--accent-2:#aec1ff;--glow:rgba(106,141,255,.14);--btn-ink:#101b35;--radius:22px;--radius-sm:12px;--shadow:0 24px 80px #0005;--gold:#ebca85}
:root[data-skin="gold"]{--bg:#151310;--surface:#211e19;--surface-2:#1b1814;--surface-3:#322c23;--line:#4b4030;--line-soft:#393126;--fg:#f5eee2;--fg-dim:#c8baa3;--fg-mute:#aa9b83;--accent:#ddbd80;--accent-2:#efdab1;--glow:rgba(221,189,128,.12);--btn-ink:#282012;--gold:#ddbd80}
:root[data-skin="cloud"]{color-scheme:light;--bg:#edf1f7;--surface:#ffffff;--surface-2:#f5f7fb;--surface-3:#e8edf6;--line:#cbd5e6;--line-soft:#e2e8f1;--fg:#23334e;--fg-dim:#566782;--fg-mute:#667791;--accent:#375ad3;--accent-2:#4569da;--glow:rgba(91,121,212,.10);--btn-ink:#fff;--shadow:0 24px 80px #39517b18;--gold:#947020}
:root[data-skin="forest"]{--bg:#0e1917;--surface:#162823;--surface-2:#11211d;--surface-3:#243c33;--line:#365348;--line-soft:#294136;--fg:#e5f3eb;--fg-dim:#afc9ba;--fg-mute:#8baa99;--accent:#97cbb0;--accent-2:#b7dfc9;--glow:rgba(120,182,150,.12);--btn-ink:#142b21;--gold:#d6c693}
body{font-family:"Inter","Segoe UI Variable Text","PingFang SC","Microsoft YaHei UI","Microsoft YaHei",sans-serif;font-size:14px;line-height:1.65;-webkit-font-smoothing:antialiased;background:radial-gradient(ellipse at 18% 8%,var(--glow),transparent 52%),radial-gradient(ellipse at 88% 90%,var(--glow),transparent 46%),var(--bg)}
button,input,select,textarea{font-family:inherit}
button{transition:background .18s,border-color .18s,box-shadow .18s;min-height:38px;font-weight:500}
button:hover:not(:disabled){background:var(--surface-3);border-color:var(--accent)}
button.primary{color:var(--btn-ink);font-weight:650;box-shadow:0 6px 22px var(--glow)}
button.primary:hover:not(:disabled){background:var(--accent);filter:brightness(1.08)}
button:focus-visible,summary:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
input,select,.chat-input-row textarea{background:var(--surface-2);min-height:42px}
input::placeholder,textarea::placeholder{color:var(--fg-mute)}
input:focus,select:focus,.chat-input-row textarea:focus{box-shadow:0 0 0 3px var(--glow)}
#start,#login,#admin,#guest,#guestjoin{padding:92px 24px 32px;overflow-y:auto;height:100%;min-height:0;align-items:safe center}
.setup-card{max-width:460px;border-radius:24px;box-shadow:var(--shadow);background:var(--surface);overflow:hidden;flex-shrink:0}
.setup-card header{padding:32px 32px 0}
.setup-card h1{font-size:26px;line-height:1.4;font-weight:650;letter-spacing:1px;margin-bottom:10px}
.setup-card .sub{font-size:13px;color:var(--fg-dim)}
.setup-body{padding:26px 32px 30px}
.setup-foot{padding:18px 28px;font-size:12px;background:var(--surface-2);line-height:1.9;color:var(--fg-dim)}
.field label{font-size:13px;color:var(--fg-dim);margin-bottom:8px}
.voice-brand{display:flex;align-items:center;gap:10px;color:var(--accent);font-size:11px;font-weight:600;letter-spacing:2.3px;margin-bottom:26px}
.voice-mark{width:38px;height:38px;display:flex;align-items:center;justify-content:center;gap:3px;background:var(--glow);border:1px solid var(--line);border-radius:12px}
.voice-mark i{width:3px;background:var(--accent);border-radius:3px;height:12px}.voice-mark i:nth-child(2),.voice-mark i:nth-child(4){height:20px}.voice-mark i:nth-child(3){height:26px}
#start h1{font-size:32px;letter-spacing:1.4px;margin-bottom:12px}
#start .setup-body button{min-height:54px;text-align:left;padding-left:18px!important;position:relative}
#start .setup-body button::after{content:'↗';position:absolute;right:18px;opacity:.7;font-size:19px}
.skin-bar{position:fixed;z-index:30;top:max(18px,env(safe-area-inset-top));right:24px;display:flex;align-items:center;gap:10px;padding:9px 12px;border:1px solid var(--line);border-radius:14px;background:var(--surface);box-shadow:0 6px 24px #0001}
.skin-bar label{font-size:12px;color:var(--fg-dim);white-space:nowrap}
.skin-bar select{width:110px;min-height:30px;padding:3px 8px;font-size:12px;border:0;background:var(--surface-2);border-radius:7px;cursor:pointer}
body.in-room .skin-bar{position:static;box-shadow:none;flex:none;margin-left:auto;padding:5px 8px;border-color:var(--line-soft)}
.room-head{background:var(--surface);padding:20px 24px}
.room-title{font-size:25px;font-weight:650;letter-spacing:1px}
.chip{font-size:11px;padding:4px 10px;border-color:var(--line)}
.stage{padding:20px;--avatar-size:clamp(56px,8vh,96px)}.stage-head h2{font-size:13px;letter-spacing:1.2px;color:var(--fg-dim)}
.stage-grow{width:100%;max-width:none;margin:0;flex:1;display:flex;flex-direction:column;justify-content:flex-start;min-height:0}
.seat-grid{flex:1;grid-template-columns:repeat(3,minmax(0,1fr));grid-template-rows:repeat(3,minmax(140px,1fr));gap:14px;align-content:stretch}
.seat{border-radius:18px;padding:16px 8px;justify-content:center;min-width:0;background:var(--surface);border:1px solid var(--line-soft)}
.seat.speaking{border-color:var(--ok);background:var(--surface-3);transform:scale(1.025)}
.seat .name{font-size:13px;font-weight:600}.seat .state,.seat.empty .slot-tip{font-size:11px;color:var(--fg-dim)}
.seat.empty .empty-circle{border-color:var(--line);color:var(--fg-mute);background:var(--surface-2)}
.avatar-fallback{background:var(--surface-3);color:var(--accent-2);border-color:var(--line)}
.slot-no{background:var(--surface-3);color:var(--fg-dim)}
.rail{background:var(--surface);border-color:var(--line)}.rail h3,.chat-head{font-size:13px;font-weight:600}
.chat-line{font-size:13px;padding:6px 4px}.chat-empty{font-size:12px}.chat-line.mine .who{color:var(--accent-2)}
.room-foot{padding:14px 24px;background:var(--surface);gap:10px;flex-wrap:wrap}.foot-log{background:var(--surface-2)}
.roompick button{background:var(--surface-2);border-radius:14px;padding:16px}.roompick button:hover:not(:disabled){background:var(--surface-3)}
.roomlist li.last-used{background:var(--surface-3);border-color:var(--accent)}
:root[data-skin="cloud"] .chip.ok{color:#17734c}:root[data-skin="cloud"] .chip.warn,:root[data-skin="cloud"] .ctrl.muted{color:#805808}:root[data-skin="cloud"] .chip.bad,:root[data-skin="cloud"] .err,:root[data-skin="cloud"] button.danger{color:#b93040}
@media(max-width:820px){.stage{padding:14px;--avatar-size:clamp(48px,7vh,72px)}.seat-grid{grid-template-rows:repeat(3,minmax(120px,1fr));gap:10px}.seat{padding:12px 3px}.room-head{padding:16px 12px}.room-foot{padding:10px 12px}}
@media(max-width:480px){.skin-bar{right:16px;top:max(14px,env(safe-area-inset-top))}.setup-card header{padding:26px 24px 0}.setup-body{padding:22px 24px 26px}#start,#login,#admin,#guest,#guestjoin{padding:84px 16px 24px}.setup-card h1{font-size:24px}#start h1{font-size:29px}.voice-brand{margin-bottom:22px}.room-title{font-size:19px}.room-head button{padding:7px 9px;font-size:12px}body.in-room .skin-bar{gap:5px}body.in-room .skin-bar label{display:none}body.in-room .skin-bar select{width:96px}.seat-grid{gap:12px 7px}.seat .name{font-size:12px}}
@media(prefers-reduced-motion:reduce){button,.seat{transition:none}}
.audio-settings-side{border:0;border-top:1px solid var(--line-soft);border-radius:0;text-align:left;padding:14px 16px;background:var(--surface);font-size:12px;color:var(--fg-dim)}
.audio-dialog{color:var(--fg);background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:0;width:min(540px,calc(100vw - 28px));max-width:none;max-height:calc(100dvh - 40px);overflow:hidden;box-shadow:var(--shadow)}
.audio-dialog[open]{display:flex;flex-direction:column}
.audio-dialog::backdrop{background:rgba(4,9,18,.65);backdrop-filter:blur(5px)}
.audio-dialog-head{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 24px 18px;border-bottom:1px solid var(--line-soft);flex:none}
.audio-dialog-head h2{margin:0;font-size:21px;font-weight:600;letter-spacing:.5px}.audio-dialog-head p{margin:5px 0 0;font-size:12px;color:var(--fg-dim)}
.audio-dialog-head button{width:36px;height:36px;min-height:36px;padding:0;flex:none}
.audio-dialog .settings-body{min-height:0;overflow:auto;padding:22px 24px 24px;overscroll-behavior:contain}
.audio-dialog .field{margin-bottom:18px}.audio-dialog label{font-size:13px;color:var(--fg-dim);margin-bottom:8px}.audio-dialog select{font-size:14px;padding:10px 12px;min-height:44px}
.audio-dialog .bitrate-field{padding:16px;margin-bottom:22px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2)}
.audio-dialog .bitrate-field label{color:var(--fg);font-weight:600}.audio-dialog .bitrate-field select{background:var(--surface);border-color:var(--accent)}
.audio-dialog .hint-mini{font-size:12px;line-height:1.75;color:var(--fg-dim)}
@media(max-width:480px){.audio-dialog{max-height:calc(100dvh - 24px);border-radius:18px}.audio-dialog-head{padding:18px}.audio-dialog .settings-body{padding:18px}.audio-dialog .bitrate-field{padding:12px}}