discourse/app/assets/stylesheets/common/components/banner.scss

// --------------------------------------------------
// Banner
// --------------------------------------------------

#banner {
  padding: 1em;
  background: var(--tertiary-low);
  color: var(--primary);
  z-index: z("base") + 1;
  margin-bottom: 1em;
  max-height: 20vh;
  overflow: auto;

  .floated-buttons {
    float: right;
    display: flex;

    > .btn {
      padding-top: 0em;
      padding-bottom: 0em;
      color: var(--primary-high);
      .d-icon {
        color: var(--primary-medium);
      }

      &:hover {
        color: var(--primary);
        .d-icon {
          color: var(--primary-high);
        }
      }
    }

    .desktop-view & .btn.close {
      margin-left: 0.25em;
    }
  }
}

#banner-content {
  hr {
    border-color: var(--primary-medium);
  }

  > p:first-child {
    margin-top: 0;
  }

  > p:last-of-type {
    margin-bottom: 0;
  }
}