:root{
  --bg:#0f1115;--surface:#161a20;--surface-2:#1c2129;--surface-3:#252b35;--border:#2a313c;--border-strong:#39424f;
  --text:#e6e9ee;--text-2:#b4bcc8;--muted:#8a93a0;--accent:#6c9dff;--accent-text:#0b1220;--ok:#4cc38a;--warn:#e2b84b;--danger:#ef5d5d;
  --radius:4px;--radius-sm:3px;--sans:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color-scheme:dark;
}
@media (prefers-color-scheme:light){:root{
  --bg:#f5f6f8;--surface:#fff;--surface-2:#f7f8fa;--surface-3:#eceff3;--border:#dde1e7;--border-strong:#c8ced7;
  --text:#14171c;--text-2:#3c4350;--muted:#6b7380;--accent:#2f6bea;--accent-text:#fff;--ok:#1f9d63;--warn:#b7860f;--danger:#d23b3b;color-scheme:light;
}}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--text);font:14px/1.5 var(--sans);-webkit-text-size-adjust:100%}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
h1{font-size:20px;margin:0;font-weight:650}h2{font-size:13px;margin:0 0 12px;text-transform:uppercase;letter-spacing:.04em;color:var(--text-2);font-weight:600}
p{margin:0 0 10px}
.muted{color:var(--muted)}.small{font-size:12.5px}.bad{color:var(--danger)}.ok{color:var(--ok)}.pad{padding:16px}.nowrap{white-space:nowrap}.right{text-align:right}.grow{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.code{font:15px/1.6 var(--mono);background:var(--surface-2);border:1px dashed var(--border-strong);border-radius:var(--radius-sm);padding:10px 12px;word-break:break-all;display:block}
span.code{display:inline;padding:2px 6px;font-size:13px}

button,a.button{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:34px;padding:0 14px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);
  background:var(--surface-3);color:var(--text);font:500 13.5px var(--sans);cursor:pointer;white-space:nowrap}
button:hover:not(:disabled){border-color:var(--muted)}button:disabled{opacity:.5;cursor:default}
button.go{background:var(--accent);border-color:var(--accent);color:var(--accent-text)}
button.danger{background:transparent;border-color:var(--danger);color:var(--danger)}
button.ghost{background:transparent}button.tiny{height:26px;padding:0 9px;font-size:12.5px}button.icon{width:34px;padding:0;font-size:18px}
button.block{width:100%}
input,select,textarea{font:14px var(--sans);height:36px;padding:0 10px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--bg);color:var(--text);min-width:0;width:100%}
textarea{height:auto;padding:8px 10px;resize:none;line-height:1.45}
input[type=checkbox],input[type=radio]{width:auto;height:auto}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent)}
label{display:flex;flex-direction:column;gap:5px;font-size:13px;color:var(--text-2)}
label.check{flex-direction:row;align-items:center;gap:8px;color:var(--text)}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.search{display:flex;gap:8px;margin-bottom:8px}.search input{flex:1}
.stack,.form{display:flex;flex-direction:column;gap:12px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;margin:0 0 16px}
.meter{height:5px;border-radius:2px;background:var(--surface-3);overflow:hidden;margin-top:4px}.meter i{display:block;height:100%;background:var(--accent)}
.badge{min-width:18px;height:18px;padding:0 5px;border-radius:3px;background:var(--danger);color:#fff;font-size:11px;font-weight:700;display:inline-flex;align-items:center;justify-content:center}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block;background:var(--muted)}.dot.live{background:var(--ok)}
.av{width:34px;height:34px;flex:none;border-radius:var(--radius);background:var(--surface-3);display:inline-flex;align-items:center;justify-content:center;font-weight:650;font-size:13px;color:var(--text-2)}
.av.sm{width:24px;height:24px;font-size:11px}.av.big{width:72px;height:72px;font-size:26px}.av.grp{color:var(--accent)}.av.lib{color:var(--warn)}

/* sign in */
.auth{max-width:400px;margin:8vh auto;padding:0 16px}
.brand{display:flex;align-items:center;gap:9px;font-weight:650}.brand img{width:24px;height:24px}.brand.big{font-size:18px;margin:0 0 16px}.brand.big img{width:30px;height:30px}
.auth h1{margin-bottom:10px}

/* app shell */
.shell{display:grid;grid-template-columns:250px 1fr;height:100vh;height:100dvh}
.topbar{display:none}
.side{background:var(--surface);border-right:1px solid var(--border);overflow-y:auto;padding:14px 10px;display:flex;flex-direction:column;gap:4px}
.side .brand{padding:2px 8px 12px}
.side nav{display:flex;flex-direction:column;gap:1px}
.side nav a{display:flex;align-items:center;gap:9px;padding:6px 8px;border-radius:var(--radius-sm);color:var(--text-2);font-weight:500;text-decoration:none}
.side nav a:hover{background:var(--surface-2)}.side nav a.on{background:var(--surface-3);color:var(--text)}
.sec{display:flex;align-items:center;justify-content:space-between;padding:14px 8px 4px;font-size:11.5px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);font-weight:600}
.sec button{height:22px;width:22px;padding:0;font-size:16px}
.usage{margin-top:auto;padding:14px 8px 4px;color:var(--text-2)}
.main{overflow:hidden;display:flex;flex-direction:column;min-width:0}
.page{padding:20px 24px;overflow-y:auto;flex:1;min-height:0}
.page.narrow>*{max-width:680px}
.head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:0 0 16px}
.crumbs{font-size:18px}.crumbs a{color:var(--text)}

/* files */
.files table{width:100%;border-collapse:collapse}
.files td{padding:7px 8px;border-bottom:1px solid var(--border);vertical-align:middle}
.files tr:hover td{background:var(--surface-2)}
.fname{cursor:pointer;display:flex;align-items:center;gap:10px;min-width:0}.fname span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ficon{width:22px;text-align:center;flex:none}
.empty{border:1px dashed var(--border-strong);border-radius:var(--radius);padding:40px 20px;text-align:center}
.drop.over{outline:2px dashed var(--accent);outline-offset:-8px}
.uploads{position:fixed;right:16px;bottom:16px;display:flex;flex-direction:column;gap:6px;z-index:40;width:min(320px,calc(100vw - 32px))}
.up{display:flex;justify-content:space-between;gap:10px;background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:var(--radius-sm);padding:8px 12px;font-size:13px}
.up.bad{border-left-color:var(--danger)}.up-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* chat */
.chat{display:flex;flex-direction:column;padding:0}
.chat .head{padding:14px 20px;margin:0;border-bottom:1px solid var(--border)}
.log{flex:1;overflow-y:auto;padding:12px 20px;display:flex;flex-direction:column;gap:2px}
.start{text-align:center;padding:16px 0}
.msg{padding:6px 10px;border-radius:var(--radius-sm);max-width:820px}
.msg:hover{background:var(--surface-2)}
.msg .meta{display:flex;align-items:baseline;gap:6px}.msg .acts{margin-left:auto;visibility:hidden}.msg:hover .acts{visibility:visible}
.msg .text{white-space:pre-wrap;word-wrap:break-word;overflow-wrap:anywhere}
.msg.mine .meta b{color:var(--accent)}
.inline-img{display:block;max-width:min(360px,100%);max-height:320px;border-radius:var(--radius-sm);margin-top:6px;cursor:zoom-in;border:1px solid var(--border)}
.file-chip{height:auto;padding:8px 12px;margin-top:6px;gap:10px;max-width:100%}
.composer{display:flex;gap:8px;align-items:flex-end;padding:12px 20px 16px;border-top:1px solid var(--border)}
.callbar{display:flex;align-items:center;gap:8px;padding:8px 20px;background:color-mix(in srgb,var(--ok) 12%,var(--surface));border-bottom:1px solid var(--border);font-size:13px}
.callbar[hidden]{display:none}

/* people */
.person{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--border)}.person:last-child{border-bottom:0}
.picks{display:flex;flex-direction:column;gap:8px;max-height:300px;overflow:auto;margin-top:10px}

/* modal, toasts */
.veil{position:fixed;inset:0;background:rgba(0,0,0,.55);display:flex;align-items:center;justify-content:center;z-index:60;padding:16px}
.modal{background:var(--surface);border:1px solid var(--border-strong);border-radius:var(--radius);width:min(520px,100%);max-height:90vh;display:flex;flex-direction:column}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border)}.modal-head h2{margin:0;text-transform:none;letter-spacing:0;font-size:15px;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.modal-body{padding:16px;overflow:auto;display:flex;flex-direction:column;gap:12px}
.modal-foot{display:flex;gap:8px;justify-content:flex-end;padding:12px 16px;border-top:1px solid var(--border);flex-wrap:wrap}
.preview img,.preview video{max-width:100%;max-height:70vh;display:block;margin:auto}.preview pre{white-space:pre-wrap;font:12.5px var(--mono);max-height:65vh;overflow:auto;margin:0}
.preview audio{width:100%}
#toasts{position:fixed;left:50%;transform:translateX(-50%);bottom:20px;display:flex;flex-direction:column;gap:8px;z-index:80;width:min(440px,calc(100vw - 32px))}
.toast{background:var(--surface);border:1px solid var(--border-strong);border-left:3px solid var(--ok);border-radius:var(--radius-sm);padding:10px 14px;font-size:13.5px}
.toast.bad{border-left-color:var(--danger)}

/* calls */
.call{position:fixed;right:16px;bottom:16px;width:min(560px,calc(100vw - 32px));background:#0b0d11;color:#e6e9ee;border:1px solid #2a313c;border-radius:var(--radius);z-index:50;display:flex;flex-direction:column}
.call.max{inset:12px;width:auto}
.call-head{display:flex;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid #2a313c}.call-head b{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.call .grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:6px;padding:6px;flex:1;min-height:0;overflow:auto}
.call.max .grid{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.tile{position:relative;background:#161a20;border-radius:var(--radius-sm);aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;overflow:hidden;border:2px solid transparent}
.tile.speaking{border-color:var(--ok)}
.tile video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.tile.has-video .av{display:none}
.tile .who{position:absolute;left:6px;bottom:5px;font-size:12px;background:rgba(0,0,0,.55);padding:1px 6px;border-radius:2px}
.call-ctl{display:flex;gap:6px;justify-content:center;padding:8px;border-top:1px solid #2a313c;flex-wrap:wrap}
.call-ctl button{background:#252b35;border-color:#39424f;color:#e6e9ee}.call-ctl button.off{background:transparent;color:#8a93a0;text-decoration:line-through}
.call-ctl button.danger{background:#ef5d5d;border-color:#ef5d5d;color:#fff}
.ring{position:fixed;top:16px;right:16px;z-index:70;background:var(--surface);border:1px solid var(--border-strong);border-left:3px solid var(--ok);border-radius:var(--radius);padding:12px 14px;display:flex;flex-direction:column;gap:10px;width:min(320px,calc(100vw - 32px))}

/* admin */
.admin .wrap{max-width:1100px;margin:0 auto;padding:20px}
.admin .row>input,.admin .row>select{width:auto;flex:1 1 180px}.admin .row>label{flex:none}
.tabs{display:flex;gap:2px;border-bottom:1px solid var(--border);margin:0 0 18px;overflow-x:auto}
.tabs a{padding:8px 14px;color:var(--text-2);border-bottom:2px solid transparent;white-space:nowrap}.tabs a.on{color:var(--text);border-bottom-color:var(--accent)}
table.list{width:100%;border-collapse:collapse;font-size:13.5px}
table.list th{text-align:left;font-weight:600;color:var(--muted);font-size:12px;padding:6px 8px;border-bottom:1px solid var(--border)}
table.list td{padding:8px;border-bottom:1px solid var(--border);vertical-align:middle}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin:0 0 16px}
.stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px}.stat b{display:block;font-size:20px}
.tag{display:inline-block;padding:0 6px;border-radius:3px;background:var(--surface-3);font-size:11.5px;color:var(--text-2)}
.scroll{overflow-x:auto}

@media (max-width:760px){
  .shell{grid-template-columns:1fr;grid-template-rows:auto 1fr}
  .topbar{display:flex;align-items:center;gap:8px;padding:6px 10px;border-bottom:1px solid var(--border);background:var(--surface);font-weight:650}
  .side{position:fixed;inset:46px 0 0 0;z-index:30;display:none}
  body.nav-open .side{display:flex}
  .page{padding:16px}
  .chat .head,.log,.composer{padding-left:12px;padding-right:12px}
  .hide-sm{display:none}
  .call:not(.max){left:8px;right:8px;bottom:8px;width:auto}
}