:root{
  --bg:#0f1117;--panel:rgba(255,255,255,.04);--line:rgba(255,255,255,.08);
  --ink:#eceef3;--mute:#8b90a0;--puff:#b48cff;--user:linear-gradient(135deg,#8a63ff,#b48cff);--radius:18px
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%}
body{margin:0;background:var(--bg) radial-gradient(900px 500px at 20% -10%,rgba(138,99,255,.18),transparent 60%) fixed;color:var(--ink);font:14px/1.5 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI Variable","Segoe UI",Inter,sans-serif;-webkit-font-smoothing:antialiased}
*{scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.15) transparent}
::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-thumb{background:rgba(255,255,255,.15);border-radius:3px}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none;padding:0}
.mark{width:34px;flex:none}
.mark.big{width:72px;margin:0 auto 6px;display:block}
.primary{background:var(--user);color:#fff;border-radius:999px;padding:9px 18px;font-weight:600}
.primary:disabled{opacity:.4;cursor:default}
.ghost{color:var(--mute);border-radius:999px;padding:6px 10px}
.ghost:hover{background:var(--panel);color:var(--ink)}
.ghost.icon{display:none;font-size:18px}
.error{color:#ff8aa5;min-height:1.2em;margin:0}

/* login */
#login{min-height:100%;display:flex;align-items:center;justify-content:center;padding:16px}
.card{width:320px;display:flex;flex-direction:column;gap:12px;padding:28px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);backdrop-filter:blur(20px);box-shadow:0 20px 50px rgba(0,0,0,.45)}
.card h1{margin:0 0 6px;text-align:center;font-weight:600}
input,textarea{background:rgba(0,0,0,.25);border:1px solid var(--line);border-radius:12px;padding:10px 12px;outline:none;resize:none}
input:focus,textarea:focus{border-color:var(--puff)}

/* dashboard shell */
#app{display:flex;height:100%}
#sidebar{width:280px;flex:none;display:flex;flex-direction:column;background:var(--panel);border-right:1px solid var(--line);backdrop-filter:blur(20px);overflow-y:auto}
.side-head{display:flex;align-items:center;justify-content:space-between;padding:16px 16px 8px;color:var(--mute);font-size:12px;text-transform:uppercase;letter-spacing:.06em}
.list{list-style:none;margin:0;padding:0 8px 8px}
.list li{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;cursor:pointer}
.list li:hover,.list li.active{background:rgba(255,255,255,.06)}
.list .text{min-width:0;flex:1}
.list .title{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.list .sub{display:block;color:var(--mute);font-size:12px}
.dot{width:8px;height:8px;border-radius:50%;background:#555b6b;flex:none}
.dot.on{background:#4ade80;box-shadow:0 0 8px rgba(74,222,128,.6)}

main{flex:1;min-width:0;display:flex;flex-direction:column}
header{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid var(--line);background:var(--panel);backdrop-filter:blur(20px)}
.grow{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:600}
#display-name{color:var(--ink)}

/* chat */
.log{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:8px;padding:20px;max-width:900px;width:100%;margin:0 auto}
.empty{margin:auto;color:var(--mute)}
.log:has(.msg) .empty{display:none}
.msg{max-width:82%;padding:9px 13px;border-radius:var(--radius);white-space:pre-wrap;word-break:break-word;animation:pop .22s cubic-bezier(.2,.8,.2,1)}
@keyframes pop{from{opacity:0;transform:translateY(6px)}}
.msg.user{align-self:flex-end;background:var(--user);color:#fff;border-bottom-right-radius:6px}
.msg.assistant{align-self:flex-start;background:var(--panel);border:1px solid var(--line);border-bottom-left-radius:6px}
.msg.assistant:empty{padding:12px 14px}
.msg.assistant:empty::after{content:"";display:block;width:28px;height:6px;background:radial-gradient(circle,var(--mute) 2.5px,transparent 3px) 0 0/10px 6px repeat-x;animation:dots 1s steps(3) infinite}
@keyframes dots{to{background-position:30px 0}}
.chip{display:inline-flex;align-items:center;gap:5px;margin:3px 4px 3px 0;padding:2px 8px;border-radius:999px;background:rgba(180,140,255,.12);color:var(--puff);font-size:11.5px;letter-spacing:.01em;white-space:nowrap}
.chip::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--puff)}

#composer{padding:12px 16px 16px;border-top:1px solid var(--line);background:var(--panel);backdrop-filter:blur(20px)}
#composer .hint{margin:0 0 8px 4px;color:var(--mute);font-size:12px}
#composer .row{display:flex;gap:8px;align-items:flex-end;max-width:900px;margin:0 auto}
#composer textarea{flex:1;max-height:160px}
#composer.off .hint{color:#ff8aa5}

/* picker */
dialog{background:#171925;color:var(--ink);border:1px solid var(--line);border-radius:var(--radius);padding:20px;width:320px;box-shadow:0 20px 50px rgba(0,0,0,.6)}
dialog::backdrop{background:rgba(0,0,0,.5);backdrop-filter:blur(4px)}
dialog h2{margin:0 0 8px;font-size:16px}
dialog .list{padding:0 0 8px}

/* phones: sidebar slides in behind the menu button */
#scrim{display:none}
@media (max-width:760px){
  .ghost.icon{display:block}
  #sidebar{position:fixed;inset:0 auto 0 0;z-index:3;background:#171925;transform:translateX(-100%);transition:transform .25s cubic-bezier(.2,.8,.2,1)}
  body.nav #sidebar{transform:none}
  body.nav #scrim{display:block;position:fixed;inset:0;z-index:2;background:rgba(0,0,0,.5)}
  .log{padding:12px}
  #logout{display:none}
}

/* stop button and live screenshot dialog */
.primary.stop{background:#ff8fa3;color:#3a0d18}
dialog.shot{width:min(96vw,1200px);max-height:92vh;padding:0;overflow:hidden}
dialog.shot header{position:static;padding:10px 14px}
dialog.shot img{display:block;width:100%;max-height:calc(92vh - 60px);object-fit:contain;background:#000}
dialog.shot img:not([src]){height:200px}
dialog.shot .hint{padding:0 14px 12px}