Squarespace mobile view configure "User-Account" login to be duplicated at top right hand corner of mobile webpage.

Hi all, i have few requests:

1. mobile view: isit possible to add the "shopping cart" icon on the top right hand corner of my webpage?

no code used.

2.mobile view: can i increase the "shopping cart" icon size purely on mobile only?

code used:

div.header-actions-action--cart>a {
    position: fixed;
    bottom: 70px;
    right: 20px;
}
/* Apply the rule for screens smaller than or equal to 768px (typical tablet portrait size) */
@media (max-width: 768px) {
    div.header-actions-action--cart>a {
    }

#1. It will be in that position or float on right of page on scroll?

#2. What is site url?