I am not sure if I use the right word "anti-aliasing" here. Please refer to below CSS and images gathered from laptop web browser and iPhone mobile browser.
input {
font-size: 1rem;
outline: none;
border: 1px solid gray;
border-radius: 5px;
padding: 0.8rem 0.7rem;
color: gray;
}
Btw Android mobile browser working fine.
This is from laptop web browser. Top border is sharp
This is from iPhone mobile web browser. Top border isn't sharp