:root { color-scheme:light; --bg:#f8fafc; --panel:#fff; --text:#0f172a; --muted:#64748b; --border:#e2e8f0; --hover:#f1f5f9; --dark:#18181b; }
* { box-sizing:border-box; }
body { margin:0; min-height:100vh; color:var(--text); background:var(--bg); font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif; font-size:14px; }
button,input { font:inherit; }
button { cursor:pointer; }
.app-shell { display:grid; grid-template-columns:240px minmax(0,1fr); width:min(1040px,calc(100% - 32px)); height:min(760px,calc(100vh - 32px)); min-height:560px; margin:16px auto; overflow:hidden; border:1px solid var(--border); border-radius:12px; background:var(--panel); box-shadow:0 8px 30px rgba(15,23,42,.06); }
.sidebar { display:flex; flex-direction:column; padding:18px 12px 12px; border-right:1px solid var(--border); background:#fafafa; }
.logo { width:170px; height:auto; margin:0 8px 20px; }
.new-chat { display:flex; align-items:center; gap:9px; width:100%; padding:9px 11px; color:var(--text); border:1px solid var(--border); border-radius:8px; background:#fff; text-align:left; font-size:12px; font-weight:600; }
.new-chat:hover { background:var(--hover); }
.new-chat span { font-size:18px; line-height:12px; }
#chat-list { flex:1; margin-top:12px; overflow-y:auto; }
.chat-row { display:grid; grid-template-columns:minmax(0,1fr) 30px; margin:3px 0; border-radius:7px; }
.chat-row:hover,.chat-row.active { background:var(--hover); }
.chat-row button { min-width:0; padding:8px 9px; overflow:hidden; color:var(--muted); border:0; background:transparent; text-align:left; text-overflow:ellipsis; white-space:nowrap; font-size:12px; }
.chat-row.active button:first-child { color:var(--text); font-weight:600; }
.chat-row .delete-chat { padding:0; color:#94a3b8; text-align:center; font-size:18px; opacity:0; }
.chat-row:hover .delete-chat,.chat-row.active .delete-chat { opacity:1; }
.chat-row .delete-chat:hover { color:#b91c1c; }
.sidebar>p { margin:12px 8px 0; color:#94a3b8; font-size:10px; line-height:1.45; }
.chat { display:grid; grid-template-rows:62px minmax(0,1fr) 66px; min-width:0; }
.chat>header { display:flex; align-items:center; gap:10px; padding:12px 18px; border-bottom:1px solid var(--border); }
.avatar { display:grid; place-items:center; width:34px; height:34px; color:#fff; border-radius:8px; background:var(--dark); }
.chat>header div { display:flex; flex-direction:column; gap:2px; min-width:0; }
.chat>header strong { overflow:hidden; font-size:13px; text-overflow:ellipsis; white-space:nowrap; }
.chat>header span:not(.avatar) { color:var(--muted); font-size:11px; }
.messages { padding:24px; overflow-y:auto; background:#fcfcfd; }
.message { width:fit-content; max-width:min(78%,620px); margin:0 0 14px; padding:10px 12px; white-space:pre-wrap; border:1px solid var(--border); border-radius:4px 11px 11px 11px; background:#fff; font-size:13px; line-height:1.55; }
.message.user { margin-left:auto; color:#fff; border-color:var(--dark); border-radius:11px 4px 11px 11px; background:var(--dark); }
.message.error { color:#991b1b; border-color:#fecaca; background:#fef2f2; }
.message.pending { color:var(--muted); }
.suggestions { display:flex; flex-wrap:wrap; gap:7px; }
.suggestions button { padding:7px 10px; color:#334155; border:1px solid var(--border); border-radius:8px; background:#fff; font-size:11px; }
.suggestions button:hover { background:var(--hover); }
.composer { display:flex; gap:9px; padding:12px 16px; border-top:1px solid var(--border); }
.composer input { flex:1; min-width:0; padding:10px 12px; border:1px solid var(--border); border-radius:9px; outline:none; }
.composer input:focus { border-color:#94a3b8; box-shadow:0 0 0 3px rgba(148,163,184,.15); }
.composer button { width:40px; color:#fff; border:0; border-radius:9px; background:var(--dark); font-size:18px; }
.composer button:disabled { cursor:wait; opacity:.45; }
@media (max-width:700px) { .app-shell { grid-template-columns:92px minmax(0,1fr); width:100%; height:100vh; min-height:0; margin:0; border:0; border-radius:0; }.sidebar { padding:12px 7px; }.logo { width:76px; margin:4px 1px 14px; }.new-chat { justify-content:center; padding:8px 4px; font-size:0; }.new-chat span { font-size:20px; }.chat-row { grid-template-columns:minmax(0,1fr); }.chat-row button:first-child { padding:8px 5px; text-align:center; font-size:10px; }.chat-row .delete-chat,.sidebar>p { display:none; }.messages { padding:16px 12px; }.message { max-width:90%; } }