:root{--bg: #1b1c1e;--panel: #27282b;--panel-2: #2f3034;--panel-3: #383a3f;--border: #3a3b40;--text: #e3e3e6;--muted: #9aa0a6;--accent: #a8c7fa;--accent-ink: #062e6f;--ok: #6dd58c;--warn: #f3c969;--danger: #f28b82;--radius: 16px;--radius-sm: 10px;--font: "Google Sans", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button{font:inherit;color:inherit;cursor:pointer}input,textarea{font:inherit;color:inherit}h2{margin:0;font-size:16px;font-weight:500}.muted{color:var(--muted)}.small{font-size:12.5px}.center{text-align:center}.app{display:flex;flex-direction:column;height:100%}.topbar{display:flex;align-items:center;justify-content:space-between;height:60px;padding:0 20px}.topbar-right,.brand{display:flex;align-items:center;gap:12px}.brand-mark{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:10px;background:var(--accent);color:var(--accent-ink);font-weight:700;font-size:18px}.brand-name{font-weight:600;letter-spacing:.5px;line-height:1.1}.brand-sub{color:var(--muted);font-size:12px}.layout{flex:1;min-height:0;display:grid;grid-template-columns:340px 1fr;gap:12px;padding:0 12px 12px}.layout-collapsed{grid-template-columns:56px 1fr}.panel{background:var(--panel);border-radius:var(--radius);display:flex;flex-direction:column;min-height:0;overflow:hidden}.panel-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border)}.panel-body{padding:14px;overflow-y:auto;display:flex;flex-direction:column;gap:12px}.panel-rail{background:var(--panel);border:0;border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;gap:8px;padding:16px 0;color:var(--muted)}.panel-rail span{writing-mode:vertical-rl;font-size:12px;letter-spacing:.5px}.panel-rail:hover{color:var(--text)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:9px 16px;border-radius:999px;border:1px solid transparent;background:var(--panel-2);font-weight:500;font-size:14px}.btn:hover{background:var(--panel-3)}.btn:disabled{opacity:.55;cursor:default}.btn-primary{background:var(--accent);color:var(--accent-ink)}.btn-primary:hover{background:#bcd5fb}.btn-outline{background:transparent;border-color:var(--border)}.btn-outline:hover{background:var(--panel-2)}.btn-ghost{background:transparent}.btn-ghost:hover{background:var(--panel-2)}.btn-block{width:100%}.icon-btn{display:inline-grid;place-items:center;width:34px;height:34px;border:0;border-radius:50%;background:transparent;color:var(--muted)}.icon-btn:hover{background:var(--panel-3);color:var(--text);text-decoration:none}.sources-meta{padding:0 4px}.source-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}.source{display:grid;grid-template-columns:22px 1fr 34px;grid-template-rows:auto auto;column-gap:10px;align-items:center;padding:8px;border-radius:var(--radius-sm)}.source:hover{background:var(--panel-2)}.source-icon{grid-row:1 / span 2;color:var(--danger)}.source-name{color:var(--text);font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.source-meta{grid-column:2;display:flex;gap:6px;align-items:center;color:var(--muted);font-size:12px}.source-download{grid-column:3;grid-row:1 / span 2}.badge{display:inline-block;padding:1px 8px;border-radius:999px;font-size:11px;font-weight:500;margin-left:4px}.badge-ok{background:#6dd58c26;color:var(--ok)}.badge-warn{background:#f3c96926;color:var(--warn)}.upload-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.upload{display:flex;flex-direction:column;gap:2px;padding:8px 12px;border-radius:var(--radius-sm);background:var(--panel-2);border-left:3px solid var(--accent);font-size:13px}.upload-done{border-left-color:var(--ok)}.upload-error{border-left-color:var(--danger)}.upload-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.upload-detail{color:var(--muted);font-size:12px}.panel-chat{position:relative}.chat-scroll{flex:1;overflow-y:auto;padding:20px 8%;display:flex;flex-direction:column;gap:18px}.empty{margin:auto;max-width:560px;text-align:center;padding:40px 0}.empty-title{font-size:22px;font-weight:500;margin-bottom:8px}.hints{list-style:none;padding:0;margin:20px 0 0;display:flex;flex-direction:column;gap:8px}.hints li{background:var(--panel-2);border-radius:var(--radius-sm);padding:10px 14px;color:var(--muted);font-size:14px}.day-sep{text-align:center;color:var(--muted);font-size:12px;margin:6px 0 14px}.msg{display:flex;flex-direction:column}.msg-user{align-items:flex-end}.msg-user .bubble{background:var(--panel-3);border-radius:18px 18px 4px;padding:10px 16px;max-width:75%;white-space:pre-wrap}.msg-assistant .answer{max-width:100%}.answer p{margin:0 0 10px}.answer p:last-child{margin-bottom:0}.answer ul,.answer ol{margin:6px 0 10px;padding-left:22px}.answer li{margin:4px 0}.answer h1,.answer h2,.answer h3{font-size:15px;font-weight:600;margin:14px 0 6px}.answer code{background:var(--panel-3);border-radius:6px;padding:1px 6px;font-size:13px}.answer pre{background:var(--panel-2);border-radius:var(--radius-sm);padding:12px;overflow-x:auto}.answer table{border-collapse:collapse;margin:8px 0;font-size:14px}.answer th,.answer td{border:1px solid var(--border);padding:6px 10px}.answer blockquote{margin:8px 0;padding:2px 12px;border-left:3px solid var(--border);color:var(--muted)}.cite{display:inline-flex;align-items:center;gap:4px;vertical-align:baseline;padding:0 8px;margin:0 2px;border-radius:999px;background:#a8c7fa24;color:var(--accent);font-size:12.5px;line-height:20px;white-space:nowrap}.cite:hover{background:#a8c7fa42;text-decoration:none}.sources-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:12px}.chip{display:inline-flex;align-items:center;gap:6px;padding:5px 10px 5px 8px;border-radius:999px;background:var(--panel-2);border:1px solid var(--border);color:var(--text);font-size:13px}.chip:hover{background:var(--panel-3);text-decoration:none}.chip-pages{color:var(--muted)}.typing{color:var(--muted);font-style:italic}.caret{display:inline-block;width:8px;height:16px;margin-left:2px;vertical-align:text-bottom;background:var(--accent);animation:blink 1s steps(2) infinite}@keyframes blink{to{opacity:0}}.composer{display:flex;align-items:flex-end;gap:10px;margin:8px 8% 4px;padding:8px 8px 8px 18px;background:var(--panel-2);border:1px solid var(--border);border-radius:28px}.composer:focus-within{border-color:var(--accent)}.composer textarea{flex:1;resize:none;border:0;outline:0;background:transparent;padding:8px 0;max-height:160px;line-height:1.5}.composer-count{padding-bottom:10px;white-space:nowrap}.send{display:grid;place-items:center;width:40px;height:40px;border:0;border-radius:50%;background:var(--accent);color:var(--accent-ink)}.send:disabled{background:var(--panel-3);color:var(--muted);cursor:default}.disclaimer{margin:2px 0 8px}.screen-center{height:100%;display:grid;place-items:center;padding:20px}.login-card{width:min(400px,100%);background:var(--panel);border-radius:var(--radius);padding:32px 28px;display:flex;flex-direction:column;gap:16px}.login-card .brand{margin-bottom:8px}.field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}.field input{padding:11px 14px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--panel-2);outline:0}.field input:focus{border-color:var(--accent)}.form-error{color:var(--danger);font-size:13px}@media(max-width:860px){.layout{grid-template-columns:1fr;grid-template-rows:auto 1fr}.layout-collapsed{grid-template-columns:1fr}.panel-sources{max-height:40vh}.panel-rail{flex-direction:row;padding:8px 16px}.panel-rail span{writing-mode:horizontal-tb}.chat-scroll,.composer{padding-left:16px;padding-right:16px;margin-left:12px;margin-right:12px}}