Want to update the CSS of the calendar.

[SuperSonicHub1]

I want to add CSS that better mimics GitHub's, specifically pertaining to the day squares of the calendar. I think it makes them pop a lot more, especially the empty ones.

.calendar-graph rect.day {
    shape-rendering: geometricPrecision;
    outline: 1px solid rgba(27, 31, 35, .04);
    outline-offset: -1px;
    rx: 2;
    ry: 2;
}