gitlab-org--gitlab-foss/app/assets/stylesheets/framework/markdown_area.scss

.div-dropzone-wrapper {
  .div-dropzone {
    position: relative;

    .div-dropzone-hover {
      position: absolute;
      top: 50%;
      left: 50%;
      margin-top: -11.5px;
      margin-left: -15px;
      opacity: 0;
      font-size: 30px;
      transition: opacity 200ms ease-in-out;
      pointer-events: none;
    }

    .div-dropzone-spinner {
      position: absolute;
      bottom: 10px;
      right: 5px;
      opacity: 0;
      font-size: 20px;
      transition: opacity 200ms ease-in-out;
    }

    .div-dropzone-icon {
      display: block;
      text-align: center;
      font-size: inherit;
    }

    .div-dropzone-progress {
      position: absolute;
      top: 7px;
      left: -40px;
      width: 35px;
      font-size: 13px;
      text-align: right;
    }

    .dz-preview {
      display: none;
    }
  }
}

.div-dropzone-alert {
  margin-top: 5px;
  margin-bottom: 0;
  transition: opacity 200ms ease-in-out;
}

.md-area {
  position: relative;
}

.md-header {
  .nav-links {
    .active {
      a {
        border-bottom-color: #000;
      }
    }

    a {
      padding-top: 0;
      line-height: 1;
      border-bottom: 1px solid $border-color;

      &.btn.btn-xs {
        padding: 2px 5px;
      }
    }
  }
}

.referenced-users {
  color: #4c4e54;
  padding-top: 10px;
}

.md-preview-holder {
  min-height: 167px;
  padding: 10px 0;
  overflow-x: auto;
}

.markdown-area {
  @include border-radius(0);
  background: #fff;
  border: 1px solid #ddd;
  min-height: 140px;
  max-height: 500px;
  padding: 5px;
  box-shadow: none;
  width: 100%;
}

.md {
  &.md-preview-holder {
    // Reset ul style types since we're nested inside a ul already
    @include bulleted-list;
  }

  // On diffs code should wrap nicely and not overflow
  code {
    white-space: pre-wrap;
    word-break: keep-all;
  }

  hr {
    // Darken 'whitesmoke' a bit to make it more visible in note bodies
    border-color: darken(#f5f5f5, 8%);
    margin: 10px 0;
  }

  // Border around images in issue and MR comments.
  img:not(.emoji) {
    border: 1px solid $table-border-gray;
    padding: 5px;
    margin: 5px 0;
    // Ensure that image does not exceed viewport
    max-height: calc(100vh - 100px);
  }
}

.toolbar-group {
  float: left;
  margin-right: -5px;
  margin-left: $gl-padding;

  &:first-child {
    margin-left: 0;
  }
}

.toolbar-btn {
  float: left;
  padding: 0 5px;
  color: #959494;
  background: transparent;
  border: 0;
  outline: 0;

  &:hover,
  &:focus {
    color: $gl-link-color;
  }
}

.atwho-view small.description {
  float: right;
  padding: 3px 5px;
}