*{margin:0;padding:0;box-sizing:border-box}:root{--bg-primary: #121212;--bg-secondary: #1e1e1e;--bg-tertiary: #2d2d2d;--text-primary: #e0e0e0;--text-secondary: #a0a0a0;--accent-color: #6366f1;--accent-hover: #4f46e5;--border-color: #333333;--error-color: #ef4444}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{min-height:100vh;display:flex;justify-content:center;padding:1rem}.chat-container{display:flex;flex-direction:column;width:100%;max-width:1024px;height:100vh;max-height:calc(100vh - 2rem);background-color:var(--bg-secondary);border-radius:12px;box-shadow:0 4px 6px #0000001a;overflow:hidden}.header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;background-color:var(--bg-tertiary);border-bottom:1px solid var(--border-color)}.header h1{font-size:1.5rem;font-weight:600}.new-chat-button{display:flex;align-items:center;gap:.5rem;background-color:transparent;color:var(--text-primary);border:1px solid var(--border-color);border-radius:6px;padding:.5rem 1rem;font-size:.875rem;cursor:pointer;transition:all .2s ease}.new-chat-button:hover{background-color:var(--bg-primary)}.messages-container{flex:1;padding:1.5rem;overflow-y:auto;display:flex;flex-direction:column;gap:1.5rem}.empty-state{height:100%;display:flex;flex-direction:column;justify-content:center;align-items:center;color:var(--text-secondary);text-align:center;padding:2rem}.message{display:flex;gap:1rem;max-width:80%}.user-message{align-self:flex-end;flex-direction:row-reverse}.ai-message{align-self:flex-start}.message-avatar{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background-color:var(--bg-tertiary);flex-shrink:0}.message-content{background-color:var(--bg-tertiary);padding:1rem;border-radius:12px;color:var(--text-primary)}.user-message .message-content{background-color:var(--accent-color)}.input-container{display:flex;gap:.75rem;padding:1rem 1.5rem;background-color:var(--bg-tertiary);border-top:1px solid var(--border-color)}.input-container textarea{flex:1;background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:6px;padding:.75rem 1rem;color:var(--text-primary);resize:none;font-family:inherit;font-size:1rem;line-height:1.5;max-height:150px;overflow-y:auto}.input-container textarea:focus{outline:none;border-color:var(--accent-color)}.input-container textarea::placeholder{color:var(--text-secondary)}.input-container button{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background-color:var(--accent-color);color:#fff;border:none;border-radius:6px;cursor:pointer;transition:all .2s ease}.input-container button:hover:not(:disabled){background-color:var(--accent-hover)}.input-container button:disabled{background-color:var(--bg-tertiary);color:var(--text-secondary);cursor:not-allowed}.loading-icon{animation:spin 1.5s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width: 768px){.message{max-width:90%}.header h1{font-size:1.25rem}.new-chat-button{padding:.5rem}.new-chat-button span{display:none}}@media (max-width: 480px){.app{padding:0}.chat-container{max-height:100vh;border-radius:0}.messages-container{padding:1rem}.message{max-width:95%}}