//$scheme-invert = hsl(0, 0%, 4%) derived value of $black in Bulma. See https://bulma.io/documentation/customize/variables/
.button.is-floating
  position: fixed
  width: 60px
  height: 60px
  bottom: 40px
  right: 40px
  border-radius: 100px
  text-align: center
  font-size: 1.6rem
  box-shadow: 0 .0625em .125em rgba($scheme-invert,.05)
  z-index: 3
  .is-large
    width: 90px
    height: 90px
    font-size: 2.6rem

  .is-medium
    width: 75px
    height: 75px
    font-size: 2.2rem

  .is-small
    width: 45px
    height: 45px
    font-size: 1.2rem
    border-radius: 50px