:root{--bg:#0b0c10;--panel:#111318;--panel-2:#171a21;--border:#23262e;--text:#e8eaf0;--muted:#8b90a0;--accent:#6d7cff}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}button,textarea{font:inherit;color:inherit}.app{height:100%;display:flex}.sidebar{background:var(--panel);border-right:1px solid var(--border);flex-direction:column;gap:16px;width:280px;padding:16px;display:flex}.brand{align-items:center;gap:10px;font-size:18px;font-weight:600;display:flex}.logo{background:var(--accent);color:#fff;border-radius:10px;place-items:center;width:32px;height:32px;font-weight:700;display:grid}.upload-btn{color:#111;cursor:pointer;background:#fff;border:0;border-radius:999px;padding:11px 16px;font-weight:600}.section-title{letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin:8px 0 4px;font-size:12px}.item{background:var(--panel-2);border:1px solid var(--border);border-radius:12px;margin-bottom:8px;padding:10px 12px;font-size:14px}.item small{color:var(--muted);margin-top:2px;display:block}.recent{color:var(--muted);cursor:pointer;padding:6px 4px;font-size:14px}.recent:hover{color:var(--text)}.main{flex-direction:column;flex:1;min-width:0;display:flex}.header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;height:60px;padding:0 24px;display:flex}.badge{border:1px solid var(--border);background:var(--panel);border-radius:999px;padding:7px 14px;font-size:14px}.chat{flex:1;padding:32px 24px;overflow-y:auto}.chat-inner{max-width:820px;margin:0 auto}h1{margin:0 0 6px;font-size:32px}.sub{color:var(--muted);margin:0 0 16px}.chips{flex-wrap:wrap;gap:8px;margin-bottom:20px;display:flex}.chip{border:1px solid var(--border);border-radius:999px;padding:6px 14px;font-size:13px}.empty{border:1px dashed var(--border);color:var(--muted);border-radius:16px;padding:24px}.examples{gap:10px;margin-top:14px;display:grid}.example{text-align:left;background:var(--panel-2);border:1px solid var(--border);cursor:pointer;border-radius:12px;padding:12px 14px}.example:hover{border-color:var(--accent)}.msg{gap:12px;margin-bottom:22px;display:flex}.avatar{border-radius:10px;flex:none;place-items:center;width:32px;height:32px;font-size:13px;font-weight:700;display:grid}.avatar.user{background:#2a2f3a}.avatar.bot{background:var(--accent);color:#fff}.bubble{white-space:pre-wrap;line-height:1.55}.sources{flex-wrap:wrap;gap:6px;margin-top:8px;display:flex}.source{border:1px solid var(--border);background:var(--panel-2);color:var(--muted);border-radius:999px;padding:3px 10px;font-size:12px}.composer{border-top:1px solid var(--border);padding:16px 24px 12px}.box{background:var(--panel);border:1px solid var(--border);border-radius:20px;align-items:flex-end;gap:10px;max-width:820px;margin:0 auto;padding:12px 14px;display:flex}.box textarea{resize:none;background:0 0;border:0;outline:0;flex:1;min-height:28px;max-height:160px}.send{background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:50%;width:38px;height:38px;font-size:18px}.send:disabled{cursor:default;background:#2a2f3a}.hint{max-width:820px;color:var(--muted);margin:8px auto 0;font-size:12px}