:root{color-scheme:dark;--bg:#08090a;--panel:#0f1011;--surface:#191a1b;--surface2:#232529;--text:#f7f8f8;--muted:#8a8f98;--border:rgba(255,255,255,.08);--accent:#5e6ad2;--accent2:#828fff;--danger:#e06c75;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px)}*{box-sizing:border-box}[hidden]{display:none!important}html,body{height:100%;margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-feature-settings:"cv01","ss03"}button,input,textarea{font:inherit}.app-shell{height:100dvh;display:grid;grid-template-columns:280px 1fr;overflow:hidden}.sidebar{background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;min-width:0}.sidebar-head{height:64px;padding:0 18px;display:flex;align-items:center;gap:10px;border-bottom:1px solid var(--border)}.sidebar-head strong{flex:1}.brand-mark{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(145deg,#7170ff,#4248a8);font-weight:600;box-shadow:0 12px 35px rgba(94,106,210,.25)}.brand-mark.small{width:28px;height:28px;border-radius:8px}.brand-mark.hero{width:58px;height:58px;border-radius:16px;margin:auto}.new-chat{margin:14px;border:1px solid var(--border);border-radius:8px;background:rgba(255,255,255,.04);color:var(--text);padding:11px 12px;text-align:left;cursor:pointer}.new-chat:hover{background:rgba(255,255,255,.07)}.session-list{padding:0 8px;overflow:auto;flex:1}.session-item{width:100%;border:0;border-radius:7px;background:transparent;color:#d0d6e0;padding:10px;text-align:left;display:flex;gap:8px;align-items:center;cursor:pointer}.session-item span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1}.session-item:hover,.session-item.active{background:rgba(255,255,255,.06);color:var(--text)}.session-delete{opacity:0;border:0;background:none;color:var(--muted);padding:3px;cursor:pointer}.session-item:hover .session-delete{opacity:1}.sidebar footer{padding:12px;border-top:1px solid var(--border)}.quiet{border:0;background:none;color:var(--muted);cursor:pointer}.chat-panel{min-width:0;height:100dvh;display:grid;grid-template-rows:auto 1fr auto;background:radial-gradient(circle at 50% -20%,rgba(94,106,210,.10),transparent 35%),var(--bg)}.topbar{height:64px;padding:var(--safe-top) 22px 0;display:flex;align-items:center;gap:14px;border-bottom:1px solid var(--border);background:rgba(8,9,10,.82);backdrop-filter:blur(14px)}.topbar>div{flex:1;display:flex;flex-direction:column;min-width:0}.topbar strong{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.topbar span#status{font-size:12px;color:var(--muted);margin-top:2px}.online-dot{width:8px;height:8px;border-radius:50%;background:#27a644;box-shadow:0 0 12px #27a644}.messages{overflow-y:auto;padding:32px max(20px,calc((100% - 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