pre.sourceCode {
    background-color: #e6e6e6!important;
}

.sources {
    padding: 16px 16px 16px 64px;
    margin-bottom: 10px;
    background: #ffdfdf;
    position:relative;
}
.sources:before {
    content: "\f019";
    font-family: FontAwesome;
    left:10px;
    position:absolute;
    top:0px;
    font-size: 44px;
}

.exercice {
    padding: 16px 16px 16px 64px;
    margin-bottom: 10px;
    background: #b8e6ff;
    position:relative;
}
.exercice:before {
    /* content: "\f5fc"; */
    content: "\f109";
    font-family: FontAwesome;
    left:10px;
    position:absolute;
    top:0px;
    font-size: 44px;
}

.important {
    padding: 16px 16px 16px 64px;
    margin-bottom: 10px;
    background: #B0E4C0;
    position:relative;
}
.important:before {
    content: "\f0a1";
    font-family: FontAwesome;
    left:10px;
    position:absolute;
    top:0px;
    font-size: 44px;
}