grapesjs/src/styles/scss/_gjs_assets.scss

.#{$app-prefix}dropzone {
  display: none;
  opacity: 0;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 11;
  width: 100%;
  height: 100%;
  transition: opacity 0.25s;
  pointer-events: none;
}

.#{$app-prefix}dropzone-active {
  .#{$app-prefix}dropzone {
    display: block;
    opacity: 1;
  }
}

.#{$am-prefix}assets {
  height: 290px;
  overflow: auto;
  clear: both;
  display: flex;
  flex-wrap: wrap;
}

.#{$am-prefix}assets-header {
  padding: 5px;
}

.#{$am-prefix}add-asset {
  .#{$am-prefix}add-field {
    width: 70%;
    float: left;
  }

  button {
    width: 25%;
    float: right;
  }
}

.#{$am-prefix}add-field input {
  padding: 6px;
}

.#{$am-prefix}preview-cont {
  position: relative;
  height: 70px;
  width: 30%;
  background-color: $mainColor;
  border-radius: 2px;
  float: left;
  overflow: hidden;
}

.#{$am-prefix}preview {
  position: absolute;
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
  height: 100%;
  width: 100%;
  z-index: 1;
}

.#{$am-prefix}preview-bg {
  @include opacity(0.5);

  position: absolute;
  height: 100%;
  width: 100%;
  z-index: 0;
}

.#{$am-prefix}dimensions {
  @include opacity(0.5);

  font-size: 10px;
}

.#{$am-prefix}meta {
  width: 70%;
  float: left;
  font-size: 12px;
  padding: 5px 0 0 5px;
  box-sizing: border-box;

  > div {
    margin-bottom: 5px;
  }
}

.#{$am-prefix}close {
  @extend .btn-cl;

  cursor: pointer;
  position: absolute;
  right: 5px;
  top: 0;
  display: none;
}

.#{$am-prefix}asset {
  border-bottom: 1px solid darken($mainDkColor, 3%);
  padding: 5px;
  cursor: pointer;
  position: relative;
  box-sizing: border-box;
  width: 100%;

  &:hover .#{$am-prefix}close {
    display: block;
  }
}

.#{$am-prefix}highlight {
  background-color: $mainLhColor;
}

.#{$am-prefix}assets-cont {
  background-color: $mainDklColor;
  border-radius: 3px;
  box-sizing: border-box;
  padding: 10px;
  width: 45%;
  float: right;
  height: 325px;
  overflow: hidden;
}