.user-tiles {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.user-tile {
    flex: 1 1 300px;
    min-height: 200px;
    padding: 20px;
    border-radius: 8px;
    color: #fff;
    cursor: pointer;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
    background-color: #666; /* Default color if none specified */
}

.user-tile h3 {
    margin-top: 0;
}