Styles for the page preview button

sc-ribbon-btn.less

@sc-red: #DC291E;
@black: #222;
@white: #fff;
@ease-in-out-cubic: cubic-bezier(0.645, 0.045, 0.355, 1);

.sc-ribbon-btn {
    position: fixed;
    bottom: 100px;
    right: 100px;
    border-radius: 100%;
    box-shadow: 0 0 6px @black;
    background: @sc-red;
    display: none;
    width: 52px;
    height: 52px;
    z-index: 999;
    transition: transform 0.25s @ease-in-out-cubic;
    transform: scale(0.9);

    &:hover {
        transform: scale(1);
    }

    &--visible {
        display: block;
    }

    &__inner {        
        position: relative;
        display: block; 
        width: 100%;
        height: 100%;       
    }

    &__icon {
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
        margin: auto;
        fill: @white;
    }
}