site-header.css

/*
 * DO NOT EDIT THIS FILE.
 * See the following change record for more information,
 * https://www.drupal.org/node/3084859
 * @preserve
 */

/**
 * @file
 * Site header.
 */

.site-header {
  position: relative;
  /**
   * Ensure mobile site header is always above other elements including
   * contextual links, quick-edit, and Tour.
   */
  z-index: 101;
}

@media (min-width: 75rem) {

  .site-header {
    /* Necessary to keep the content from jumping up when header transitions to fixed. */
    min-height: 11.25rem;
    border-bottom: solid 1px transparent; /* Will show in Windows high contrast mode. */
  }
}

.site-header__initial {
  position: relative;
  z-index: 102;
  display: flex;
  align-items: flex-end;
  -ms-grid-row-align: stretch;
  align-self: stretch;
  background-color: #2494db;
}

.site-header__fixable {
  display: flex;
  align-items: flex-end;
  transition: all 0.5s;
}

@media (min-width: 75rem) {
  .site-header__fixable.is-fixed:not(.is-expanded) {
    pointer-events: none;
  }
}

@media (min-width: 75rem) {
  body:not(.is-always-mobile-nav) .site-header__fixable.is-fixed {
    position: fixed;
    z-index: 102; /* Appear above body content that is position: relative */
    top: -4.5rem;
    max-width: 98.125rem;
  }

  /* Toolbar is fixed, and tray is either vertical or closed and horizontal. */
  body.toolbar-vertical.toolbar-fixed:not(.is-always-mobile-nav) .site-header__fixable.is-fixed,
  body.toolbar-horizontal.toolbar-fixed:not(.is-always-mobile-nav) .site-header__fixable.is-fixed {
    top: -2.0625rem;
  }
  /* Toolbar is fixed, and tray is open and horizontal. */
  body.toolbar-horizontal.toolbar-fixed.toolbar-tray-open:not(.is-always-mobile-nav) .site-header__fixable.is-fixed {
    top: 0.4375rem;
  }
}

.site-header__inner {
  z-index: 1; /* Appear in front of Drupal's tabs. */
  flex-grow: 1;
  width: calc(100vw - 5.625rem);
  background: #fff;
}

/*
 * Only apply transition styles when JS is loaded. This
 * works around https://bugs.chromium.org/p/chromium/issues/detail?id=332189
 */

@media (min-width: 75rem) {

  html.js body:not(.is-always-mobile-nav) .site-header__inner {
    transition: opacity 0.3s, transform 0.3s, box-shadow 0.3s;
  }
}

@media (min-width: 75rem) {

  .site-header__fixable.is-expanded .site-header__inner {
    box-shadow: -36px 1px 36px rgba(0, 0, 0, 0.08); /* LTR */
  }
}

@media (min-width: 75rem) {

  [dir="rtl"] .site-header__fixable.is-expanded .site-header__inner {
    box-shadow: 36px 1px 36px rgba(0, 0, 0, 0.08);
  }
}

/* Hide the desktop nav when it's fixed and not active. */

@media (min-width: 75rem) {

  body:not(.is-always-mobile-nav) .site-header__fixable.is-fixed:not(.is-expanded) .site-header__inner {
    transform: translateX(-101%); /* LTR */
    opacity: 0;
  }
}

@media (min-width: 75rem) {

  [dir="rtl"] body:not(.is-always-mobile-nav) .site-header__fixable.is-fixed:not(.is-expanded) .site-header__inner {
    transform: translateX(101%);
  }
}

.site-header__inner__container {
  display: flex;
  justify-content: space-between;
}