* {
    margin: 0;padding: 0;border: 0;box-sizing: border-box;
}

body {
    background-color: aliceblue;
}

header {
text-align: center;
}

.photo_album_boxes_container {
    width: 90%;
    margin: 100px auto 50px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.photo_album_boxes_container > div{
    border: 4px solid black;
    background-size: 250px 250px;
    max-width: 250px;
    height: 250px;
}
.photo_album_boxes_container>div:nth-child(1){
background-image: url(/images/fairy_ring.jpg);
}
.photo_album_boxes_container>div:nth-child(2){
    background-image: url(/images/grassy_field.jpg);
}   
.photo_album_boxes_container>div:nth-child(3){
    background-image: url(/images/fall_season.jpg);
}
.photo_album_boxes_container>div:nth-child(4){
    background-image: url(/images/church_boat.jpg);
}
.photo_album_boxes_container>div:nth-child(5){
    background-image: url(/images/sailboat.jpg);
}
.photo_album_boxes_container>div:nth-child(6){
    background-image: url(/images/lonesome_tree.jpg);
}
.photo_album_boxes_container>div:nth-child(7){
    background-image: url(/images/mountain_stream.jpg);
}
.photo_album_boxes_container>div:nth-child(8){
    background-image: url(/images/skyward_view.jpg);
}
.photo_album_boxes_container>div:nth-child(9){
    background-image: url(/images/waterfall.jpg);
}
.photo_album_boxes_container>div:nth-child(10){
    background-image: url(/images/earth_night.jpg);
}