:root{--background-color: #121212;--surface-color: #1e1e1e;--primary-color: #bb86fc;--text-color: #e0e0e0;--secondary-text-color: #a0a0a0;--user-message-color: #2d2d2d;--ai-message-color: #242424;--border-color: #333333;--disabled-color: #505050}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:var(--background-color);color:var(--text-color);line-height:1.6}.chat-container{display:flex;flex-direction:column;height:100vh;max-width:1024px;margin:0 auto;padding:0 16px}.chat-header{display:flex;justify-content:space-between;align-items:center;padding:16px 0;border-bottom:1px solid var(--border-color)}.chat-header h1{font-size:1.5rem;font-weight:500}.reset-button{display:flex;align-items:center;gap:8px;background:none;border:1px solid var(--border-color);color:var(--text-color);padding:8px 12px;border-radius:4px;cursor:pointer;font-size:.875rem;transition:background-color .2s}.reset-button:hover{background-color:#ffffff0d}.messages-container{flex:1;overflow-y:auto;padding:16px 0;display:flex;flex-direction:column;gap:16px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--secondary-text-color);text-align:center;padding:32px}.message{display:flex;gap:12px;padding:12px 16px;border-radius:8px;max-width:100%;animation:fadeIn .3s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.user-message{background-color:var(--user-message-color);align-self:flex-end}.ai-message{background-color:var(--ai-message-color);align-self:flex-start}.message-avatar{flex-shrink:0;font-weight:600;font-size:.75rem;color:var(--primary-color);width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%;background-color:#bb86fc1a}.message-content{word-break:break-word;white-space:pre-wrap}.loading{display:flex;gap:6px;align-items:center}.dot{width:8px;height:8px;background-color:var(--secondary-text-color);border-radius:50%;animation:pulse 1.5s infinite ease-in-out}.dot:nth-child(2){animation-delay:.2s}.dot:nth-child(3){animation-delay:.4s}@keyframes pulse{0%,to{transform:scale(.6);opacity:.6}50%{transform:scale(1);opacity:1}}.input-container{display:flex;gap:8px;padding:16px 0;border-top:1px solid var(--border-color)}textarea{flex:1;background-color:var(--surface-color);color:var(--text-color);border:1px solid var(--border-color);border-radius:8px;padding:12px 16px;font-family:inherit;font-size:1rem;resize:none;outline:none;transition:border-color .2s;min-height:48px}textarea:focus{border-color:var(--primary-color)}textarea::placeholder{color:var(--secondary-text-color)}.send-button{display:flex;align-items:center;justify-content:center;background-color:var(--primary-color);color:#000;border:none;border-radius:8px;width:48px;height:48px;cursor:pointer;transition:opacity .2s}.send-button:hover{opacity:.9}.send-button:disabled{background-color:var(--disabled-color);opacity:.5;cursor:not-allowed}@media (max-width: 768px){.message{padding:10px 12px}.chat-header h1{font-size:1.25rem}}@media (max-width: 480px){.chat-container{padding:0 8px}.message-avatar{width:24px;height:24px;font-size:.6rem}}