.txtAcp{
  position: relative;
  user-select:all;
  transition: 0.4s;
}

.txtAcp::before, .txtAcp::after{
  
  font-weight:bold;
  display: inline-block;
  transition: 0.2s;
  overflow-x: hidden;
  width: 0;
  height: 3ex;
  vertical-align: top;
  white-space: nowrap;
}

.txtAcp:hover{
  font-size:105%;
}

.txtAcp::before{content: 'Clique là ⇒'; text-align: right;}
.txtAcp::after{content: '⇐ Et copie-ça !'; text-align: left;}
.txtAcp:hover::before{width: 8em; margin-right:0.5em;}
.txtAcp:hover::after{width: 8em; margin-left:0.5em;}