.closable {
  position: relative;
}
.closable .message-closer {
  position: absolute;
  right: 0.4em;
  top: 0.45em;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3em;
  padding: 0.2em;
  width: 1em;
  height: 1em;
  opacity: 0.8;
  transition: all 0.5s;
}
.closable .message-closer:hover,
.closable .message-closer:active,
.closable .message-closer:focus {
  opacity: 1;
}