body {
            font-family: Arial, sans-serif;
            background-color: #3498db;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }

        .login-container {
            background-color: #fff;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            width: 350px;
            text-align: center;
        }

        .header-section {
            margin-bottom: 25px;
        }

        .header-section i {
            font-size: 36px;
            color: #4a4a4a;
            margin-bottom: 10px;
        }

        .header-section h2 {
            font-size: 28px;
            color: #333;
            margin-bottom: 5px;
        }

        .header-section p {
            font-size: 14px;
            color: #777;
        }

        .role-selection {
            display: flex;
            justify-content: center;
            margin-bottom: 25px;
            background-color: #f0f2f5;
            border-radius: 10px;
            padding: 5px;
        }

        .role-button {
            flex: 1;
            padding: 10px 15px;
            border: none;
            border-radius: 8px;
            background-color: transparent;
            color: #666;
            font-size: 16px;
            cursor: pointer;
            transition: background-color 0.3s, color 0.3s;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .role-button.active {
            background-color: #3498db;
            color: white;
            box-shadow: 0 4px 8px rgba(0, 123, 255, 0.2);
        }

        .role-button i {
            margin-right: 8px;
        }

        .form-group {
            text-align: left;
            margin-bottom: 15px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #555;
            font-weight: bold;
        }

        .form-group input[type="text"],
        .form-group input[type="password"] {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 16px;
            box-sizing: border-box;
        }

        .form-group .password-container {
            position: relative;
        }

        .form-group .password-container input {
            padding-right: 40px;
        }

        .form-group .password-container .toggle-password {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            cursor: pointer;
            color: #999;
        }

        .login-button {
            background-color: #3498db;
            color: white;
            padding: 12px 20px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            width: 100%;
            font-size: 18px;
            font-weight: bold;
            transition: background-color 0.3s ease;
        }

        .login-button:hover {
            background-color: #2980b9;
        }

        .error-message {
            color: red;
            margin-bottom: 15px;
            font-weight: bold;
        }