.r-archive-item {
    width: 600px;
    max-width: 100%;
}
.r-archive-item:after {
    content: '';
    display: table;
    clear: both;
}
.r-archive-content {
    width: 83%;
    float: right;
}
.r-archive-item__cover {
    width: 16%;
    float: right;
}
.r-archive-item__cover img {
    width: 100%;
    height: auto;
}

.r-single-item:after {
    content: '';
    display: table;
    clear: both;
}
.r-single-item__cover {
    width: 200px;
    float: right;
}
.r-single-item__cover img {
    width: 100%;
    height: auto;
}