// Get all main package buttons
// Get all sub-package buttons
// Function to set the active package and sub-package by default
// Get the current value of the hidden inputs
// If no main package is selected, set the first button's value as default
// If no sub-package is selected, set the first button's value as default
// Set the default selections when the page loads
// Add click event listener to each main package button
// Remove active class from all main package buttons
// Add active class to the clicked button
// Update the hidden input field with the selected package value
// Add click event listener to each sub-package button
// Remove active class from all sub-package buttons
// Add active class to the clicked button
// Update the hidden input field with the selected sub-package value
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