:root {
  --bg: #0b1020; --panel: #141b34; --panel-2: #1c2547; --text: #eef2ff; --muted: #a9b4d0;
  --accent: #6ea8fe; --danger: #fb7185; --border: #2b396b; --chat-user: #1d4ed8; --chat-assistant: #1f2937; --shadow: 0 12px 40px rgba(0,0,0,.22);
}
:root[data-theme='light'] {
  --bg: #eef3ff; --panel: #ffffff; --panel-2: #f2f5fb; --text: #0f172a; --muted: #475569;
  --accent: #2563eb; --danger: #e11d48; --border: #d7e0f0; --chat-user: #dbeafe; --chat-assistant: #f8fafc; --shadow: 0 12px 28px rgba(15,23,42,.08);
}
* { box-sizing: border-box; }
body { margin:0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: linear-gradient(180deg, var(--bg) 0%, color-mix(in srgb, var(--bg) 88%, #ffffff 12%) 100%); color: var(--text); }
.container { max-width:1180px; margin:0 auto; padding:28px 16px 60px; }
.hidden { display:none !important; }
header { margin-bottom:18px; }
.header-row { display:flex; justify-content:space-between; gap:16px; align-items:flex-start; }
h1 { margin:0 0 8px; font-size:34px; }
.sub { margin:4px 0; color:var(--muted); }
.card { background:var(--panel); border:1px solid var(--border); border-radius:16px; padding:20px; margin-bottom:18px; box-shadow:var(--shadow); }
.login-overlay {
  position: fixed; inset: 0; display:flex; align-items:center; justify-content:center; padding:20px;
  background: color-mix(in srgb, var(--bg) 72%, black 28%); backdrop-filter: blur(10px); z-index: 9999;
}
.login-modal { width:min(100%, 420px); }
.login-brand { display:inline-block; margin-bottom:12px; padding:6px 10px; border-radius:999px; background:color-mix(in srgb, var(--accent) 20%, transparent); color:var(--accent); font-weight:700; }
.login-error { margin-top:12px; padding:10px 12px; border-radius:12px; background:color-mix(in srgb, var(--danger) 18%, var(--panel)); border:1px solid color-mix(in srgb, var(--danger) 35%, transparent); color:var(--text); }
.topbar { padding-bottom:14px; }
.profile-bar { display:flex; align-items:end; justify-content:space-between; gap:16px; flex-wrap:wrap; }
.profile-picker { min-width:260px; flex:1; }
.layout { display:grid; grid-template-columns:minmax(360px,480px) 1fr; gap:18px; }
.chat-head { display:flex; justify-content:space-between; align-items:center; gap:12px; }
h2,h3 { margin:0 0 10px; }
h3 { color:var(--muted); font-size:15px; font-weight:500; }
.grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px; }
label { display:flex; flex-direction:column; gap:8px; }
label.model-field { position:relative; }
label.full { grid-column:1 / -1; }
input,textarea,button,select { font:inherit; }
input,textarea,select { width:100%; background:var(--panel-2); color:var(--text); border:1px solid var(--border); border-radius:12px; padding:12px 14px; outline:none; }
.secret-row { display:grid; grid-template-columns:1fr auto; gap:10px; align-items:center; }
button.small { padding:10px 12px; border-radius:10px; font-weight:600; }
.model-list { position:absolute; top:100%; left:0; right:0; margin-top:8px; max-height:360px; overflow:auto; border:1px solid var(--border); border-radius:12px; background:var(--panel-2); padding:8px; z-index:30; box-shadow:var(--shadow); }
.model-item { width:100%; text-align:left; background:transparent; color:var(--text); border:1px solid transparent; padding:10px 12px; border-radius:10px; white-space:normal; word-break:break-all; }
.model-item:hover { background:color-mix(in srgb, var(--accent) 12%, transparent); border-color:color-mix(in srgb, var(--accent) 25%, transparent); }
input:focus,textarea:focus,select:focus { border-color:var(--accent); box-shadow:0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); }
.actions { display:flex; gap:12px; margin-top:16px; }
.actions.wrap { flex-wrap:wrap; }
.actions.compact { margin-top:0; }
button,.file-btn { border:0; border-radius:12px; padding:12px 16px; cursor:pointer; background:var(--accent); color:white; font-weight:700; text-decoration:none; display:inline-flex; align-items:center; justify-content:center; }
button.secondary,.file-btn.secondary { background:#64748b; }
button.danger { background:var(--danger); }
button:disabled { opacity:.6; cursor:wait; }
.hint { margin-top:10px; color:var(--muted); font-size:14px; }
.result { margin-top:12px; background:var(--panel-2); border:1px solid var(--border); border-radius:12px; padding:12px; white-space:pre-wrap; word-break:break-word; max-height:240px; overflow:auto; }
.chat-box { min-height:420px; max-height:620px; overflow:auto; background:var(--panel-2); border:1px solid var(--border); border-radius:14px; padding:14px; }
.msg { padding:12px 14px; border-radius:14px; margin-bottom:12px; line-height:1.65; white-space:normal; border:1px solid transparent; }
.msg.user { background:var(--chat-user); margin-left:8%; }
.msg.assistant { background:var(--chat-assistant); margin-right:8%; border-color:var(--border); }
.msg.error { background:color-mix(in srgb, var(--danger) 18%, var(--panel)); border-color:color-mix(in srgb, var(--danger) 35%, transparent); }
.msg-body p { margin:0 0 10px; }
.msg-body p:last-child { margin-bottom:0; }
.msg-body pre { margin:10px 0; overflow:auto; padding:12px; border-radius:10px; background:color-mix(in srgb, var(--panel-2) 75%, black 25%); color:#e2e8f0; }
:root[data-theme='light'] .msg-body pre { color:#0f172a; background:#e2e8f0; }
.msg-body code { padding:2px 6px; border-radius:6px; background:color-mix(in srgb, var(--panel-2) 85%, white 15%); }
.msg-body ul { margin:8px 0 8px 18px; padding:0; }
.msg-body a { color:var(--accent); }
.composer { margin-top:14px; display:grid; grid-template-columns:1fr auto; gap:12px; align-items:end; }
.composer-actions { display:flex; flex-direction:column; gap:10px; }
@media (max-width:960px) { .layout { grid-template-columns:1fr; } }
@media (max-width:720px) { .grid { grid-template-columns:1fr; } .composer { grid-template-columns:1fr; } .composer-actions { flex-direction:row; } .header-row { flex-direction:column; } }