.icon {
    fill: currentColor;
    display: inline-block;
    vertical-align: middle;
}
.icon-xs {
    width: 0.75rem;
    height: 0.75rem;
}
.icon-sm {
    width: 1rem;
    height: 1rem;
}
.icon-md {
    width: 1.5rem;
    height: 1.5rem;
}
.icon-lg {
    width: 2rem;
    height: 2rem;
}
.icon-xl {
    width: 3rem;
    height: 3rem;
}
.icon-xxl {
    width: 4rem;
    height: 4rem;
}