addon.css

.angular-schema-form--base64-file label {
  display: block;
}

[base64-file-upload] {
  cursor: pointer;
}

.base64-file--drop-area {
  width:100%;
  background: transparent;
  color: inherit;
  cursor: pointer;
  border-radius: 5px;
  padding: 0 40px;
  min-height: 110px;
  max-height: 110px;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-wrap: wrap;
  -ms-flex-wrap: wrap;
          flex-wrap: wrap;
  align-items: center;
  border: 2px dashed rgba(0, 0, 0, 0.3);
  outline: none;
}

.base64-file--drop-area:focus {
  outline: none;
}

.base64-file--drop-area-description {
  display: block;
  width: 100%;
  text-align:center;
}

.base64-file--drop-area-description {
  font-size:20px;
}

.ng-invalid-base64-file-upload-size .base64-file--drop-area {
  border-color: #e93a29;
}

.base64-file--drop-area.file-hovering {
  border-color: #29e981;
  border-style: solid;
}

.base64-file--file {
  position: relative;
  white-space: nowrap;
  width: 100%;
}

.base64-file--file::after,
.base64-file--file::before {
  content: ' ';
  clear: both;
  display: table;
}

.base64-file--file-remove {
  float:right;
  cursor: pointer;
  padding:10px;
  position: absolute;
  top: 0;
  right: -10px;
  font-size:16px;
}

.base64-file--file-size,
.base64-file--file-name {
  float:left;
  padding-right: 20px;
  margin-left: 10px;
  display:inline-block;
  width: calc(100% - 100px);
  white-space: normal;
  text-align: left;
  font-weight: lighter;
}

.base64-file--file-name {
  font-size: 16px;
}

.base64-file--file-size {
  font-size: 11px;
}

.base64-file--file-preview {
  float:left;
  width: 75px;
  height: 75px;
  background: rgba(211, 212, 200, 0.4);
  border-radius: 5px;
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  display: inline-block;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.base64-file--file-preview > span {
  line-height: 75px;
  font-size: 26px;
  padding:4px;
  opacity: 0.2;
  text-transform: uppercase;
}