* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f0f2f5;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
        }
        
        header {
            text-align: center;
            margin-bottom: 30px;
            padding: 20px;
            background: linear-gradient(135deg, #3a7bd5, #00d2ff);
            color: white;
            border-radius: 10px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        
        header h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
        }
        
        header p {
            font-size: 1.1rem;
            opacity: 0.9;
        }
        
        .feedback-form {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            margin-bottom: 30px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #555;
        }
        
        input, textarea, select {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 16px;
            transition: border-color 0.3s;
        }
        
        input:focus, textarea:focus, select:focus {
            border-color: #3a7bd5;
            outline: none;
            box-shadow: 0 0 0 2px rgba(58, 123, 213, 0.2);
        }
        
        textarea {
            min-height: 120px;
            resize: vertical;
        }
        
        .submit-btn {
            background: linear-gradient(135deg, #3a7bd5, #00d2ff);
            color: white;
            border: none;
            padding: 14px 20px;
            font-size: 18px;
            border-radius: 5px;
            cursor: pointer;
            width: 100%;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        
        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        }
        
        .submit-btn:active {
            transform: translateY(0);
        }
        
        .message {
            padding: 15px;
            border-radius: 5px;
            margin-bottom: 20px;
            text-align: center;
        }
        
        .success {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }
        
        .error {
            background-color: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
        
        .warning {
            background-color: #fff3cd;
            color: #856404;
            border: 1px solid #ffeaa7;
        }
        
        table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }
        
        th, td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        
        th {
            background-color: #f8f9fa;
            font-weight: 600;
        }
        
        tr:hover {
            background-color: #f8f9fa;
        }
        
        .action-btn {
            padding: 6px 12px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
            margin-right: 5px;
        }
        
        .blacklist-btn {
            background-color: #dc3545;
            color: white;
        }
        
        .whitelist-btn {
            background-color: #28a745;
            color: white;
        }
        
        .footer {
            text-align: center;
            margin-top: 40px;
            color: #777;
            font-size: 14px;
        }
        
        @media (max-width: 600px) {
            .container {
                padding: 10px;
            }
            
            header h1 {
                font-size: 2rem;
            }
            
            .feedback-form, .admin-panel {
                padding: 20px;
            }
        }