:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}html,body,#root{height:100%;margin:0;padding:0}.chat-box{display:flex;flex-direction:column;height:100%;max-width:800px;margin:0 auto;background:#1a1a2e;border-radius:12px;overflow:hidden}.messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:16px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:#888;text-align:center}.empty-state h2{font-size:2rem;margin-bottom:8px}.message{display:flex;max-width:80%}.message.user{align-self:flex-end}.message.assistant{align-self:flex-start}.message-content{padding:12px 16px;border-radius:16px;line-height:1.5;white-space:pre-wrap;word-break:break-word}.message.user .message-content{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-bottom-right-radius:4px}.message.assistant .message-content{background:#2d2d44;color:#e0e0e0;border-bottom-left-radius:4px}.message-content.typing{color:#888;font-style:italic}.billing-info{display:flex;justify-content:center;gap:20px;padding:8px 16px;background:#667eea1a;font-size:12px;color:#888;border-top:1px solid #333}.billing-info span{display:flex;align-items:center;gap:4px}.input-area{display:flex;gap:12px;padding:16px;background:#16213e;border-top:1px solid #333}.input-area textarea{flex:1;padding:12px 16px;border:none;border-radius:24px;background:#1a1a2e;color:#fff;font-size:14px;resize:none;outline:none;font-family:inherit;min-height:24px;max-height:120px}.input-area textarea::placeholder{color:#666}.input-area button{padding:12px 24px;border:none;border-radius:24px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-weight:600;cursor:pointer;transition:opacity .2s,transform .2s}.input-area button:hover:not(:disabled){opacity:.9;transform:scale(1.02)}.input-area button:disabled{opacity:.5;cursor:not-allowed}.user-info{display:flex;align-items:center;gap:12px;padding:12px 16px;background:#ffffff0d;border-radius:12px}.user-info.loading{color:#888;justify-content:center}.user-avatar{width:40px;height:40px;border-radius:50%;overflow:hidden;flex-shrink:0}.user-avatar img{width:100%;height:100%;object-fit:cover}.avatar-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-weight:600;font-size:18px}.user-details{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}.user-name{font-weight:500;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-balance{font-size:12px;color:#888}.logout-btn{padding:6px 12px;border:1px solid #444;border-radius:6px;background:transparent;color:#888;font-size:12px;cursor:pointer;transition:all .2s}.logout-btn:hover{border-color:#f44;color:#f44}*{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:linear-gradient(135deg,#0f0c29,#302b63,#24243e);color:#fff;min-height:100vh}.app{min-height:100vh;display:flex;flex-direction:column}.app.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px}.loading-spinner{width:40px;height:40px;border:3px solid #333;border-top-color:#667eea;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.login-page{display:flex;align-items:center;justify-content:center}.login-container{text-align:center;padding:60px 40px;background:#ffffff0d;border-radius:20px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1)}.login-container h1{font-size:2.5rem;margin-bottom:16px;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.login-container p{color:#888;margin-bottom:32px}.login-btn{padding:16px 48px;border:none;border-radius:30px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;font-size:18px;font-weight:600;cursor:pointer;transition:transform .2s,box-shadow .2s}.login-btn:hover{transform:translateY(-2px);box-shadow:0 10px 30px #667eea66}.app-header{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:#0000004d;border-bottom:1px solid rgba(255,255,255,.1)}.app-header h1{font-size:1.5rem;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.app-main{flex:1;padding:24px;display:flex;flex-direction:column;overflow:hidden}