img.thumbnail {
    height: 150px;
    border: 1px solid black;
}

/* Senior tutors: flexbox grid, 2 per row */
.senior-tutors {
    display: flex;
    flex-wrap: wrap;
}

.senior-tutor {
    display: flex;
    align-items: flex-start;
    gap: 0.5em;
    width: 50%;
    box-sizing: border-box;
    padding-bottom: 2ex;
    padding-right: 1em;
}

.senior-tutor .info {
    padding-top: 0.25em;
}

/* Casual tutors: flexbox grid, 3 per row, auto-reflows */
.casual-tutors {
    display: flex;
    flex-wrap: wrap;
}

.casual-tutor {
    display: flex;
    align-items: flex-start;
    gap: 0.5em;
    width: 33.33%;
    box-sizing: border-box;
    padding-bottom: 2ex;
    padding-right: 1em;
}

.casual-tutor .info {
    padding-top: 0.25em;
}