* {
    box-sizing: border-box;
}

header {
    background-image: url("junkshelf.jpg");
    height: 200px;
    background-size: contain;
    background-repeat: no-repeat;
}

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%;
    border-collapse: collapse;
    background-color: #f9f9f9;
}

caption {
    font-size: 2em;
    margin-bottom: 10px;
    text-align: left;
}

thead {
    background-color: #cce5ff;
}

tfoot {
    background-color: #ffe5e5;
    font-weight: bold;
}

th, td {
    border: 1px solid #666;
    padding: 10px;
    text-align: left;
}

@media only screen and (max-width: 720px) {

    table, thead, tbody, th, td, tr {
        display: block;
    }

    thead {
        display: none;
    }

    tr {
        margin-bottom: 15px;
    }

    td {
        text-align: right;
        padding-left: 50%;
        position: relative;
    }

    td::before {
        content: attr(data-label);
        position: absolute;
        left: 0;
        width: 50%;
        padding-left: 10px;
        font-weight: bold;
        text-align: left;
    }
}