vikunja-frontend/src/styles/components/switch-view.scss

.switch-view {
  background: $white;
  display: inline-block;
  border-radius: $radius;
  font-size: .8em;
  box-shadow: 0.3em 0.3em 0.8em darken($light, 6);
  height: $switch-view-height;
  margin-bottom: 1em;

  a {
    padding: .5em;
    display: inline-block;
    margin: .4em;
    border-radius: $radius;

    -webkit-transition: all 100ms;
    -moz-transition: all 100ms;
    -ms-transition: all 100ms;
    -o-transition: all 100ms;
    transition: all 100ms;

    &:not(:last-child) {
      margin-right: 0;
    }

    &.is-active, &:hover {
      color: $white;
    }

    &.is-active {
      background: $primary;
      font-weight: bold;
      box-shadow: 0.3em 0.3em 0.8em darken($light, 6);
    }

    &:hover {
      background: lighten($primary, 5);
    }
  }
}