:root{color-scheme:light;--bg:#f4f5f7;--panel:#ffffff;--panel-2:#eceff3;--text:#17202a;--muted:#5f6b7a;--border:#d5dbe3;--accent:#0e7490;--danger:#b91c1c}:root[data-theme=dark]{color-scheme:dark;--bg:#0b1020;--panel:#10172b;--panel-2:#16203a;--text:#f8fafc;--muted:#93a3b8;--border:#24304a;--accent:#22d3ee;--danger:#f87171}*{box-sizing:border-box}body,html{margin:0;padding:0;background:radial-gradient(circle at 20% 0,#1e293b22,transparent 40%),var(--bg);color:var(--text);font-family:Iosevka Aile,IBM Plex Sans,sans-serif;min-height:100%}button,input,textarea{font:inherit}button{cursor:pointer;border:1px solid var(--border);background:var(--panel-2);color:var(--text);border-radius:10px;padding:.4rem .7rem}button:disabled{opacity:.5;cursor:not-allowed}input,textarea{width:100%;border:1px solid var(--border);background:var(--panel);color:var(--text);border-radius:10px;padding:.6rem .7rem}.centered{min-height:100vh;display:grid;place-items:center;padding:1rem}.card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:1rem}.auth{width:min(420px,100%);display:grid;gap:.8rem}.auth h1{margin:0;font-size:1.25rem}.auth label,.settings label{display:grid;gap:.4rem;font-size:.9rem}.app-shell{display:grid;grid-template-columns:300px 1fr;min-height:100vh}.sidebar{border-right:1px solid var(--border);background:var(--panel);padding:1rem;display:grid;gap:1rem}.sidebar-top{display:flex;justify-content:space-between;align-items:center}.chat-list{display:grid;gap:.6rem;align-content:start;overflow-y:auto}.chat-item{border:1px solid var(--border);background:var(--panel-2);border-radius:10px;padding:.6rem;display:grid;gap:.5rem}.chat-item.active{border-color:var(--accent)}.chat-title{background:transparent;border:0;text-align:left;padding:0}.chat-actions{display:flex;gap:.4rem}.chat-panel{display:grid;grid-template-rows:auto auto 1fr auto auto;min-height:100vh}.topbar{padding:1rem;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:.8rem}.topbar h2{margin:0;font-size:1.1rem}.toolbar{display:flex;gap:.5rem}.settings{margin:1rem;display:grid;gap:.8rem}.messages{padding:1rem;overflow-y:auto;display:grid;gap:.7rem;align-content:start}.message{padding:.75rem .9rem;border-radius:12px;border:1px solid var(--border);white-space:pre-wrap}.message.user{background:color-mix(in srgb,var(--accent) 14%,var(--panel))}.message.assistant{background:var(--panel)}.message p{margin:0}.thinking{color:var(--muted);font-size:.9rem}.composer{padding:1rem;border-top:1px solid var(--border);display:grid;grid-template-columns:1fr auto;align-items:end;gap:.6rem;background:var(--panel)}.composer-input{min-height:44px;max-height:180px;resize:vertical;line-height:1.4;white-space:pre-wrap;overflow-wrap:anywhere}.error{margin:0;color:var(--danger);font-size:.9rem}.bottom-error{padding:0 1rem 1rem}@media (max-width:880px){.app-shell{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid var(--border)}.toolbar{flex-wrap:wrap;justify-content:flex-end}}