:root{--bg:#0f1115;--panel:#171a21;--panel-2:#1f232c;--border:#2a2f3a;--text:#e7e9ee;--muted:#9aa3b2;--accent:#19b34b;--accent-2:#0e7a32}*{box-sizing:border-box}body,html{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.app{display:grid;grid-template-columns:280px 1fr;height:100vh}.sidebar{background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0}.brand{padding:16px;font-weight:700;font-size:15px;display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--border)}.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--accent)}.new-chat{margin:12px;padding:10px 12px;border:1px solid var(--border);background:var(--panel-2);color:var(--text);border-radius:10px;cursor:pointer;font-size:14px;text-align:left}.new-chat:hover{border-color:var(--accent)}.conv-list{overflow-y:auto;padding:0 8px 8px;flex:1 1;min-height:0}.conv-item{padding:10px 12px;border-radius:8px;cursor:pointer;font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:flex;justify-content:space-between;gap:8px}.conv-item.active,.conv-item:hover{background:var(--panel-2);color:var(--text)}.conv-item .del{opacity:0;color:var(--muted)}.conv-item:hover .del{opacity:1}.sidebar-foot{padding:12px;border-top:1px solid var(--border);font-size:12px;color:var(--muted)}.sidebar-foot button{background:none;border:none;color:var(--muted);cursor:pointer;padding:0;text-decoration:underline}.main{display:flex;flex-direction:column;min-height:0}.messages{flex:1 1;overflow-y:auto;padding:24px 0}.row{width:100%}.row .inner{max-width:780px;margin:0 auto;padding:8px 24px;display:flex;gap:14px}.row.user{background:transparent}.row.assistant{background:hsla(0,0%,100%,.015)}.avatar{width:28px;height:28px;border-radius:6px;flex:0 0 28px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}.avatar.user{background:#313845}.avatar.assistant{background:var(--accent-2)}.bubble{flex:1 1;line-height:1.6;font-size:15px;white-space:pre-wrap;word-wrap:break-word}.sources{margin-top:14px;border-top:1px dashed var(--border);padding-top:10px}.sources h4{margin:0 0 8px;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}.source{font-size:13px;color:var(--muted);padding:6px 0;border-bottom:1px solid var(--border)}.source .ref{color:var(--text)}.source .badge{display:inline-block;background:var(--panel-2);border:1px solid var(--border);border-radius:6px;padding:0 6px;margin-right:6px;color:var(--accent);font-weight:700}.composer{border-top:1px solid var(--border);padding:16px}.composer .inner{max-width:780px;margin:0 auto;display:flex;gap:10px;align-items:flex-end}textarea{flex:1 1;resize:none;background:var(--panel-2);border:1px solid var(--border);border-radius:12px;color:var(--text);padding:12px 14px;font-size:15px;font-family:inherit;max-height:180px}textarea:focus{outline:none;border-color:var(--accent)}.send{background:var(--accent);border:none;color:#04130a;font-weight:700;border-radius:12px;padding:12px 18px;cursor:pointer;font-size:15px}.send:disabled{opacity:.5;cursor:not-allowed}.hint{max-width:780px;margin:8px auto 0;font-size:11px}.empty,.hint{color:var(--muted);text-align:center}.empty{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:24px}.empty h2{color:var(--text);margin:0}.examples{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:12px;max-width:640px}.examples button{background:var(--panel-2);border:1px solid var(--border);color:var(--text);border-radius:10px;padding:10px 12px;font-size:13px;cursor:pointer}.examples button:hover{border-color:var(--accent)}.login{height:100vh;display:flex;align-items:center;justify-content:center}.login .card{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:32px;width:360px;max-width:90vw}.login h1{font-size:18px;margin:0 0 4px}.login p{color:var(--muted);font-size:13px;margin:0 0 20px}.login input{width:100%;background:var(--panel-2);border:1px solid var(--border);border-radius:10px;color:var(--text);padding:12px 14px;font-size:15px;margin-bottom:12px}.login input:focus{outline:none;border-color:var(--accent)}.login button{width:100%;background:var(--accent);border:none;color:#04130a;font-weight:700;border-radius:10px;padding:12px;cursor:pointer;font-size:15px}.login .err{color:#ff6b6b;font-size:13px;margin-bottom:12px}