app/styles/core/buttons.scss
$btn-circle-size: 56px;
/* fixing crappy outline on button focus */
.btn:focus {
outline: none !important;
}
.btn-circle {
padding: 0;
border-radius: 50%;
width: $btn-circle-size;
height: $btn-circle-size;
min-width: $btn-circle-size;
.icon {
position: relative;
fill: #fff;
top: 15px;
}
}