maputnik/src/styles/_layer.scss

// LAYER LIST
.maputnik-layer-list-container {
  padding: 0;
  margin: 0;
  padding-bottom: $margin-5;
}
.maputnik-layer-list-item {
  font-weight: 400;
  color: $color-lowgray;
  font-size: $font-size-6;
  border-width: 0px 0px 1px;
  border-style: solid;
  border-color: lighten($color-black, 0.1);
  user-select: none;
  list-style: none;
  z-index: 2000;
  cursor: pointer;
  position: relative;
  padding: 5px 10px;
  background-color: $color-black;
  line-height: 1.3;
  display: flex;
  flex-direction: row;
}

.maputnik-icon-action svg {
  fill: $color-black;
}

.maputnik-layer-list-item:hover, .maputnik-layer-list-item-selected {
  background-color: lighten($color-black, 0.8);

  .maputnik-icon-action svg {
    fill: $color-midgray;
    &:hover {
      fill: $color-lowgray;
    }
  }
}
.maputnik-layer-list-item-id {
  width: 115px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

// FILTER EDITOR
.maputnik-layer-editor-group {
  font-weight: bold;
  font-size: $font-size-5;
  background-color: darken($color-gray, 1.5);
  color: $color-lowgray;
  cursor: pointer;
  user-select: none;
  padding: $margin-2;
  display: flex;
  flex-direction: row;
  line-height: 20px;
}
.maputnik-filter-editor-property {
  display: inline-block;
  width: '22%';
}
.maputnik-filter-editor-operator {
  display: inline-block;
  width: 19%;
  margin-left: 2%;
}
.maputnik-filter-editor-args {
  display: inline-block;
  width: 54%;
  margin-left: 2%;
}