* {
    box-sizing: border-box;
}

header {
    background-image: url("junkshelf.jpg");
    height: 200px;
    background-size: contain;
}

header h1 {
    margin: 0;
    color: white;
    text-align: center;
    font-size: 6em;
    line-height: 2em;
}

footer {
    margin-top: 20px;
    border-top: 3px solid red;
    text-align: center;
    font-style: italic;
}

table {
    width: 100%;
    background-color: lightgray;
    border: 2px solid black;
    border-collapse: collapse;
}

th, td {
    border: 1px solid black;
    padding: 10px;
    text-align: left;
}

thead {
    background-color: darkgray;
}

tfoot {
    background-color: darkgray;
    font-weight: bold;
}

@media screen and (max-width: 719px) {
    table {
        display: block;
        overflow-x: auto;
    }
}