.list-demo li:empty {
    display: none;
}
.list-demo li:not(:empty):nth-child(odd) {
    background-color: #f8f9fa;
}
.list-demo li:not(:empty):hover {
    background-color: #e3f2fd;
    cursor: pointer;
}
.list-demo li {
    padding: 10px;
    border-bottom: 1px solid #eee;
    transition: background-color 0.2s;
}
.list-demo {
    list-style: none;
    padding: 0;
    margin: 0;
    border: 1px solid #ddd;
    border-radius: 4px;
}