layout-builder-ux-message.css in Layout Builder UX 8

.js-messages__wrapper.layout-container {
  max-width: 100%;
}

.js-messages__wrapper {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  z-index: 42;
  display: flex;
  flex-direction: column;
  transition: padding-right 0.7s ease, padding-left 0.7s ease, padding-top 0.3s ease;
}

.js-messages__wrapper .messages,
[dir="rtl"] .js-messages__wrapper .messages {
  margin: 0 5vw;
}

.js-messages__wrapper [data-drupal-message-type] {
  display: none;
}

.js-messages__wrapper [data-drupal-message-type].messages__closeable {
  display: block;
}

.messages__closeable {
  position: relative;
}

.drupal-message-close {
  border: none;
  background: url('../images/bebebe/ex.svg');
  width: 16px;
  height: 16px;
  padding: 0;
  position: absolute;
  top: 10px;
  right: 10px; /* LTR */
  appearance: none;
}

[dir="rtl"] .drupal-message-close {
  right: auto;
  left: 10px;
}

.js-messages__wrapper .messages + .messages {
  margin-top: 1em;
}

.messages__closeable {
  animation: .5s ease-out .5s both fadeIn;
}

@supports (--css: variables) {
  .messages__closeable {
    animation: .5s ease-out calc(var(--animation-index) * .15s) both fadeIn;
  }
}


@keyframes fadeIn {
  0% {
    opacity: 0;
    transform: translateY(-20%);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.toolbar-fixed .js-messages__wrapper {
  top: 60px;
}

.toolbar-horizontal.toolbar-tray-open .js-messages__wrapper {
  top: 100px;
}

.toolbar-vertical.toolbar-tray-open .js-messages__wrapper {
  padding-left: 15em; /* LTR */
}

[dir="rtl"] .toolbar-vertical.toolbar-tray-open .js-messages__wrapper {
  padding-right: 15em;
  padding-left: 0;
}

.toolbar-fixed .js-messages__wrapper .messages:first-child {
  margin-top: 0; /* bartik override */
}