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auto}.chat-selector{margin-bottom:20px}.chat-selector select{padding:10px 15px;border:1px solid #ddd;border-radius:4px;font-size:16px;min-width:300px}.chat-management{background:#fff;border-radius:8px;box-shadow:0 2px 4px #0000001a;overflow:hidden}.tab-navigation{display:flex;background:#f8f9fa;border-bottom:1px solid #dee2e6}.tab-navigation button{padding:15px 25px;border:none;background:transparent;cursor:pointer;font-size:14px;font-weight:500;color:#6c757d;transition:all .2s}.tab-navigation button:hover{background:#e9ecef;color:#495057}.tab-navigation button.active{background:#fff;color:#007bff;border-bottom:2px solid #007bff}.tab-content{padding:0}.chats-section{flex:1}.chats-section h3{color:#333;margin-bottom:1rem}.chat-container{background:#fff;border-radius:8px;padding:1.5rem;box-shadow:0 2px 4px #0000001a;margin-bottom:1rem}.manage-admins-btn{margin-top:1rem;padding:.5rem 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h2{font-size:1.2rem}.collapse-btn{font-size:1rem}}.feedback-trigger{position:fixed;bottom:20px;right:20px;width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px #00000026;transition:all .3s ease;z-index:999}.feedback-trigger:hover{transform:scale(1.05);box-shadow:0 6px 16px #0003}.feedback-trigger:active{transform:scale(.95)}.feedback-modal{position:fixed;bottom:90px;right:20px;width:380px;max-width:calc(100vw - 40px);background:#fff;border-radius:12px;box-shadow:0 10px 40px #00000026;z-index:1000;animation:slideUp .3s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.feedback-content{padding:0}.feedback-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid #e5e7eb}.feedback-header h3{margin:0;font-size:18px;font-weight:600;color:#1f2937}.feedback-close{background:none;border:none;font-size:28px;color:#6b7280;cursor:pointer;line-height:1;padding:0;width:30px;height:30px;display:flex;align-items:center;justify-content:center;transition:color .2s}.feedback-close:hover{color:#374151}.feedback-textarea{width:100%;min-height:120px;padding:16px 20px;border:none;resize:vertical;font-family:inherit;font-size:14px;line-height:1.5;color:#1f2937;outline:none}.feedback-textarea::placeholder{color:#9ca3af}.feedback-footer{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;border-top:1px solid #e5e7eb}.feedback-char-count{font-size:12px;color:#6b7280}.feedback-submit{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:8px 24px;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}.feedback-submit:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 12px #667eea66}.feedback-submit:disabled{opacity:.5;cursor:not-allowed}.feedback-message{margin:12px 20px 16px;padding:10px 16px;border-radius:6px;font-size:14px;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.feedback-message.success{background:#d1fae5;color:#065f46;border:1px solid #a7f3d0}.feedback-message.error{background:#fee2e2;color:#991b1b;border:1px solid #fecaca}@media (max-width: 480px){.feedback-modal{right:10px;left:10px;width:auto;bottom:80px}.feedback-trigger{right:15px;bottom:15px;width:50px;height:50px}}*{box-sizing:border-box}.loading-container{display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;background:#f5f5f5}.loading-spinner{width:40px;height:40px;border:4px solid #f3f3f3;border-top:4px solid #2196f3;border-radius:50%;animation:spin 1s linear infinite;margin-bottom:1rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading-container p{color:#666;font-size:1.1rem}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}