/* Bloc gauche */
.sidebar {
  	width: 5.0em;
  	background-color:rgba(0, 0,0, 0.0);
  	padding: 20px;
  	border-right: 10px groove rgba(0,255,255,1);
	/* border-right:inset 10px rgba(0,255,255,1);		 */

  	border-top: 2px solid #abced4;	

	background-color: #fff;
	background-image:
		linear-gradient(90deg, transparent 79px, #abced4 79px, #abced4 81px, transparent 81px),
		linear-gradient(#eee .1em, transparent .1em);
	background-size: 100% 1.2em; 
}

.sidebar a {
    display: block;
    padding: 10px 15px;
    text-decoration: none;
    color: #333;
}

.sidebar a:hover {
    background-color: #f2f2f2; /* effet survol */
}