Target iOS main only within Gmail
@supports (-webkit-overflow-scrolling:touch) and (color:#ffff) {
/* iOS 10 Only CSS */
u ~ div .iOS-hide{
display: none !important;
max-height: 0px !important;
}
@supports (-webkit-overflow-scrolling:touch) and (color:#ffff) {
/* iOS 10 Only CSS */
u ~ div .iOS-hide{
display: none !important;
max-height: 0px !important;
}