wagtail/client/scss/components/_header.scss

@use 'sass:math';
@use 'sass:color';

.w-header {
  @apply w-text-primary;
  margin-bottom: theme('spacing.8');

  h1,
  h2 {
    @apply w-text-primary;
    margin: 0;
  }

  h1 {
    @apply w-h1;
    position: relative;
  }

  .w-header__glyph {
    position: absolute;
    inset-inline-start: calc(0 - theme('spacing.11'));
    vertical-align: text-top;

    &.icon {
      top: 0.125em;
      max-width: 1em;
      max-height: 1em;
    }

    &.avatar {
      margin-inline-start: calc(0 - theme('spacing.2'));
    }
  }

  .w-header__subtitle {
    margin-inline-start: theme('spacing[1.5]');
    font-weight: theme('fontWeight.normal');
  }

  .w-header__description {
    font-size: theme('fontSize.18');
    font-weight: theme('fontWeight.normal');
  }

  // Give padding to the rows inside of headers so that nested breadcrumbs aren't padded by their parent header el.
  // Use w-header--with-padding for headers that don't contain .row elements.
  &.w-header--with-padding,
  > .row {
    padding-top: theme('spacing.2');
    padding-bottom: theme('spacing.[2.5]');
    padding-inline-start: 110px;
    padding-inline-end: theme('spacing.5');
  }

  &.w-header--merged .w-breadcrumb {
    padding-inline-start: $mobile-nav-indent;
  }

  .col {
    float: left;
    margin-inline-end: 2em;
  }

  .left {
    float: left;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
  }

  .right {
    text-align: end;
    float: right;
  }

  // For case where content below header should merge with it
  &.w-header--merged {
    margin-bottom: 0;
    padding-bottom: theme('spacing.1');
  }

  &.w-header--no-border {
    border: 0;
  }

  &.w-header--merged.w-header--no-border {
    padding-bottom: 0;
  }

  .error-message {
    color: inherit;
  }

  .last-updated {
    ul {
      padding: 0;
    }

    li {
      display: inline;
      margin-inline-end: 2em;
    }

    .avatar.small {
      margin-inline-start: 0;
    }

    a {
      font-weight: theme('fontWeight.bold');
    }
  }
}

@include media-breakpoint-up(sm) {
  .w-header {
    .row {
      padding-inline-start: $desktop-nice-padding;
      padding-inline-end: $desktop-nice-padding;
      padding-top: theme('spacing.10');
    }

    &.w-header--merged .w-breadcrumb {
      padding-inline-start: 0;
    }

    .w-header__glyph {
      &.avatar {
        margin-inline-start: calc(0 - theme('spacing.9'));
      }
    }

    .left {
      float: left;
      margin-inline-end: 0;

      &:first-child {
        padding-bottom: 0;
        float: left;
      }
    }

    .second {
      clear: none;

      .right,
      .left {
        float: right;
      }
    }

    .col3 {
      @include column(3);
    }

    .col3.actionbutton {
      width: auto;
    }

    .col6 {
      @include column(6);
    }

    .col9 {
      @include column(9);
    }
  }
}