app/styles/components/db-selector.scss
.select-options-container {
  margin-bottom: -10px;
  $option-margin: 10px;

  &.row {
    margin-left: $option-margin / 2 * -1;
    margin-right: $option-margin / 2  * -1;

    .col-xs-4 {
      padding-left: $option-margin / 2;
      padding-right: $option-margin / 2;
    }
  }

  .selected-option {
    .select-option {
      border: 2px solid $color-bright-blue;
      padding: 4px;
    }
  }

  .select-option {
    border: 1px solid #e5e5e5;
    background: #fff;
    border-radius: 3px;
    box-shadow: 0 0 3px rgba(#000, 0.06);
    border-color: #d9d9d9;
    cursor: pointer;
    text-align: center;
    padding: 5px;
    display: block;
    height: 61px;
    margin-bottom: $option-margin;

    .select-option-image {
      max-width: 85px;
      margin-top: 14px;
    }

    &:hover {
      border-color: $color-bright-blue;
      box-shadow: 0 0 4px rgba($color-bright-blue, 0.5);
    }
  }

  .mysql .select-option-image {
    width: 60%;
    margin-top: 9px;
  }

  .postgresql .select-option-image {
    margin-top: 11px;
  }

  .mongodb .select-option-image {
   margin-top: 10px;
  }

  .redis .select-option-image {
    margin-top: 12px;
  }

  .couchdb .select-option-image {
    margin-top: 12px;
  }

  .elasticsearch .select-option img {
    margin-top: 17px;
  }
}