kspace-wordpress-theme/scss/custom/_mobile.scss

#mobile-sidebar {
  position: fixed;
  top:0;
  left:-100vw;
  width:100vw;
  height:100vh;
  transition: left 0.2s;
  padding: 1rem;
  overflow: scroll;
  &.shown {
    left:0;
  }

  @include sm() {
    display:none;
  }

  z-index:10;
}

.menu-button {
  position:fixed;
  bottom: 24px;
  right: 24px;
  background-color:rgba(0,0,0,0.2);
  color:$color-font-light;
  padding:0.75em;
  border:none;
  font-size:1.2rem;
  display:flex;
  align-content: center;
  justify-content: center;
  aspect-ratio: 1;
  border-radius:999px;
  z-index: 12;

  &:hover {
    background-color: $color-primary;
  }

  @include sm() {
    display: none;
  }
}