*{box-sizing:border-box;margin:0}body{color:#e6e6e6;background:#0f1115;font-family:system-ui,sans-serif}.chat{flex-direction:column;max-width:720px;height:100dvh;margin:0 auto;padding:1rem;display:flex}header{border-bottom:1px solid #2a2d35;justify-content:space-between;align-items:center;padding-bottom:.75rem;display:flex}header h1{font-size:1.1rem;font-weight:600}header button{color:#9aa0ab;cursor:pointer;background:0 0;border:1px solid #2a2d35;border-radius:6px;padding:.3rem .7rem}.messages{flex-direction:column;flex:1;gap:.75rem;padding:1rem 0;display:flex;overflow-y:auto}.empty{color:#6b7280;text-align:center;margin-top:3rem}.msg{white-space:pre-wrap;border-radius:12px;max-width:85%;padding:.6rem .9rem;line-height:1.45}.msg.user{color:#fff;background:#2563eb;align-self:flex-end}.msg.assistant{background:#1c1f26;align-self:flex-start}form{gap:.5rem;padding-top:.75rem;display:flex}form input{color:#e6e6e6;background:#1c1f26;border:1px solid #2a2d35;border-radius:8px;flex:1;padding:.65rem .9rem;font-size:1rem}form button{color:#fff;cursor:pointer;background:#2563eb;border:none;border-radius:8px;padding:0 1.1rem}form button:disabled{opacity:.5;cursor:default}