papercss/src/components/_tabs.scss

.tabs {
  .content {
    display: none;
    flex-basis: 100%;
    padding: 0.75rem 0 0;
  }

  input {
    display: none;

    &:checked + label {
      @include color(color, 'primary');
      @include color('border-bottom-color', 'secondary');
      border-bottom-style: solid;
      border-bottom-width: 3px;
    }

    @for $num from 1 through 5 {
      &[id$='tab#{$num}']:checked~div[id$='content#{$num}'] {
        display: block;
      }
    }
  }

  label {
    @include color('color', primary-light);
    display: inline-block;
    font-weight: 600;
    margin: 0 0 -1px;
    padding: 0.75rem;
    text-align: center;

    &:hover {
      @include color('color', muted);
      cursor: pointer;
    }
  }
}