.up-button {
    $this: &;

    @include size(70px);
    @include transition;

    position: fixed;
    right: 30px;
    bottom: 15px;
    padding: 0;
    border: 0;
    cursor: pointer;
    z-index: 1000;
    visibility: hidden;
    opacity: 0;

    svg {
        @include size(100%);
    }

    &--is-visible {
        visibility: visible;
        opacity: 1;
    }

    @include event {
        scale: 1.1;
    }
}