:root{--bg:#0b0f0d;--panel:#11161300;--panel-solid:#0f1512;--border:#1e2a23;--text:#d6e2db;--muted:#7c8f85;--accent:#3fb950;--accent-dim:#2a7d39;--user:#9bd1ff}*{box-sizing:border-box}body,html{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);font-family:ui-monospace,SFMono-Regular,JetBrains Mono,Menlo,Consolas,monospace;font-size:14px;line-height:1.55}.app{display:flex;flex-direction:column;height:100vh;max-width:900px;margin:0 auto}.header{padding:14px 18px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:10px}.header .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent)}.header h1{font-size:15px;margin:0;font-weight:600;letter-spacing:.3px}.header .sub{color:var(--muted);font-size:12px}.chat{flex:1 1;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:14px}.msg{white-space:pre-wrap;word-break:break-word}.msg .who{color:var(--muted);font-size:12px;margin-bottom:4px}.msg.user .who{color:var(--user)}.msg.assistant .who{color:var(--accent)}.msg .body{padding-left:2px}.cursor{display:inline-block;width:8px;background:var(--accent);animation:blink 1s steps(2) infinite}@keyframes blink{0%,50%{opacity:1}50.01%,to{opacity:0}}.empty{color:var(--muted);margin:auto;text-align:center}.empty code{color:var(--accent)}.composer{border-top:1px solid var(--border);padding:12px 14px;display:flex;gap:10px;align-items:flex-end}.composer textarea{flex:1 1;resize:none;background:var(--panel-solid);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-family:inherit;font-size:14px;min-height:44px;max-height:160px;outline:none}.composer textarea:focus{border-color:var(--accent-dim)}.composer button{background:var(--accent);color:#06130a;border:none;border-radius:8px;padding:10px 16px;font-weight:700;cursor:pointer;font-family:inherit}.composer button:disabled{opacity:.5;cursor:not-allowed}.hint{padding:0 16px 10px}.hint,.usage{color:var(--muted);font-size:11px}.usage{margin-top:4px}