Popup Pro Styling + Subscribe by Email Form Styling + Pop on click

Hi there! Hope the team's doing well. Would someone please help me with styling my subscribe popup with the subscribe form shortcode thingy in it to look like the one attached?

Also... I would like this popup to pop up on click of a button. I am using Avada theme with this button shortcode which I can add CSS attributes to. Here is the shortcode:

[button link="" color="default" size="xlarge" type="" shape="square" target="_self" title="" gradient_colors="|" gradient_hover_colors="|" accent_color="" accent_hover_color="" bevel_color="" border_width="0px" shadow="" icon="fa-download" icon_divider="no" icon_position="left" modal="" animation_type="0" animation_direction="down" animation_speed="0.1" class="" id=""]Download[/button]

Thanks =)