.file-plus img {
  background: #fff;
  transition-duration: 0.2s;
  margin-bottom: 0.4em;
  border: 1px solid #ccc;
}
.file-plus img:hover {
  opacity: 0.8;
}
.file-plus .file-plus-title {
  font-size: 1.4rem;
}
.file-plus.icon-used img {
  background: transparent;
  border: none;
}
.margin-top .file-plus {
  margin-top: 1em;
}
.file-plus-center {
  text-align: center;
}
.file-plus-center img {
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 0.4em;
}