:root{--bg:#0b0d10;--panel:#14171c;--border:#232830;--text:#e7ebf0;--muted:#8c95a3;--accent:#5b8def;--user-bubble:#1e2530;--assistant-bubble:#14171c;--danger:#ef4444}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%}body{font-family:ui-sans-serif,-apple-system,system-ui,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}.shell{max-width:820px;margin:0 auto;padding:28px 16px 140px}.head{margin-bottom:20px}.headrow{display:flex;align-items:center;justify-content:space-between;gap:12px}.title{font-size:20px;font-weight:700;margin:0 0 4px}.subtitle{font-size:13px;color:var(--muted);margin:0}.muted,.signout{color:var(--muted);font-size:12px}.signout{background:transparent;border:1px solid var(--border);border-radius:8px;padding:5px 10px;cursor:pointer}.signout:hover{color:var(--text);border-color:var(--accent)}.card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:20px;margin-top:16px}.label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}.input{width:100%;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:10px 12px;font:inherit;font-size:14px}.input:focus{outline:none;border-color:var(--accent)}.btn{width:100%;height:40px;background:var(--accent);color:#fff;border:none;border-radius:8px;font-weight:600;cursor:pointer}.btn:disabled{opacity:.6;cursor:default}.suggestions{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 16px}.chip{background:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:999px;padding:8px 14px;font-size:13px;cursor:pointer}.chip:hover:not(:disabled){border-color:var(--accent)}.chip:disabled{opacity:.5;cursor:default}.bubble{border:1px solid var(--border);border-radius:10px;padding:12px 14px;margin:10px 0;line-height:1.55;font-size:14px;white-space:pre-wrap}.bubble.user{background:var(--user-bubble)}.bubble.assistant{background:var(--assistant-bubble);white-space:normal}.role{font-size:11px;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.05em}.tool-trace{font-size:12px;color:var(--accent);margin-bottom:8px}.working{color:var(--muted);font-size:13px}.md :first-child{margin-top:0}.md :last-child{margin-bottom:0}.md h1,.md h2,.md h3{font-size:15px;margin:14px 0 6px}.md p{margin:8px 0}.md ol,.md ul{margin:8px 0;padding-left:20px}.md code{background:#0f1318;padding:1px 5px;border-radius:4px;font-size:13px}.md table{border-collapse:collapse;width:100%;margin:10px 0;font-size:13px}.md td,.md th{border:1px solid var(--border);padding:6px 9px;text-align:left}.md th{background:var(--panel)}.md strong{color:#fff}.composer{position:fixed;bottom:0;left:0;right:0;background:linear-gradient(transparent,var(--bg) 24px);padding:16px;display:flex;gap:10px;max-width:820px;margin:0 auto}.composer textarea{flex:1 1;resize:none;background:var(--panel);color:var(--text);border:1px solid var(--border);border-radius:10px;padding:10px 12px;font:inherit;font-size:14px}.composer textarea:focus{outline:none;border-color:var(--accent)}.composer button{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:0 20px;font-weight:600;cursor:pointer}.composer button:disabled{opacity:.5;cursor:default}