.chat-container{max-width:720px;margin:4rem auto;font-family:sans-serif;padding:0 1rem}.chat-input-row{display:flex;gap:.75rem}.chat-input-row input{flex:1;padding:.6rem 1rem;font-size:1rem;border:1px solid #ddd;border-radius:8px}.chat-input-row button{padding:.6rem 1.2rem;font-size:1rem;border:none;border-radius:8px;background:#000;color:#fff;cursor:pointer}.chat-input-row button:disabled{background:#999;cursor:not-allowed}.thinking-bubble{border:1px solid #e5e5e5;border-radius:12px;overflow:hidden}.thinking-header{display:flex;align-items:center;gap:.5rem;padding:.75rem 1rem;cursor:pointer;background:#fafafa;font-size:.9rem;color:#666;-webkit-user-select:none;user-select:none}.thinking-header .dot{width:8px;height:8px;border-radius:50%;background:#999;animation:pulse 1s infinite}.thinking-header .dot.done{background:#22c55e;animation:none}@keyframes pulse{0%,to{opacity:1}50%{opacity:.3}}.thinking-steps{padding:.75rem 1rem;border-top:1px solid #e5e5e5;font-size:.85rem;color:#888;line-height:1.8}.answer{margin-top:1.5rem;font-size:1rem;line-height:1.7;color:#111}.history{margin-bottom:2rem;display:flex;flex-direction:column;gap:1rem}.message{padding:.75rem 1rem;border-radius:12px;max-width:85%}.message--user{background:#f4f4f4;align-self:flex-end}.message--assistant{background:#fff;border:1px solid #e5e5e5;align-self:flex-start}.message-role{font-size:.75rem;color:#999;display:block;margin-bottom:.25rem}