message: fix(leadspace): add button gradient styling to theme
diff: @import '../../globals/imports';
  @import 'carbon-components/scss/components/button/button';
  +$btn-min-width: 26;
  +
  @function aspectratio($height, $width) {
  $ratio: carbon--rem($height) / carbon--rem($width) * 100%;
  @return $ratio;
  }
  +// items that change according to the theme applied
  @mixin themed-items {
  @include button;
  }
  .#{$prefix}--leadspace--gradient {
  + background-color: rgba($ui-background, 0.75);
  +
  + @include carbon--breakpoint(md) {
  background-image: linear-gradient(
  to right,
  rgba($ui-background, 0.95),
  }
  }
  -@mixin leadspace {
  - $btn-min-width: 26;
  + .#{$prefix}--btn {
  + width: 100%;
  + margin-top: $layout-01;
  + min-width: carbon--mini-units($btn-min-width);
  + }
  +}
  +@mixin leadspace {
  .#{$prefix}--leadspace {
  position: relative;
  padding-top: aspectratio(370px, 320px);
  