hr {
    padding-top: 2em;
    margin-top: 3em;
}

.collection {
    background: lightblue;
    padding: .5em 1.2em;
    display: block;
    float: right;
    width: 80px;
    text-align: center;
}

.collection::after {
    position: absolute;
    content: "";
    display: block;
    height: 0;
    width: 0;
    border-top: 70px solid transparent;
    border-left: 70px solid lightblue;
    bottom: -26px;
    left: 7px;
    transform: rotate(-45deg);
    bottom: -32px;
    left: 5px;    
    z-index: -1;
}

.separator {
    margin-bottom: .7em; 
    padding-top: .7em;
    border-bottom: 1px dashed #efefef; 
}