Separate the drop shadow from the button wrapper into its own fixed
element with a lower z-index. This prevents the shadow from appearing
over the hamburger menu when it's pulled out on mobile.
- Create separate button_wrapper_shadow element
- Move box-shadow styling to shadow element
- Set shadow z-index to 9 to stay below menu but above page content
- Use fixed positioning with pointer-events: none
Alexander Bocken
51b0928489
