.post-title {
    display: block;
    min-height: 3rem;
}

.post-title :nth-child(1) {
    font-size: 3rem;
    display: inline-block;
}

.post-title :nth-child(2) {
    font-size: 0.9rem;
    display: inline-block;
    line-height: 0.9rem;
}