body {
    font-family:Arial, Helvetica, sans-serif;
    box-sizing: border-box;
    background-color: gray;
}
.content-block {
    border: 3px solid black;
    margin: auto;
    border-radius: 5px;
    background-color: lightgreen;
    box-shadow: 8px 8px gray;
}
header, footer {
    background-color: cyan;
    border: 3px solid black;
    border-radius: 5px;
    text-align: center;
    padding: 10px;
    width:90%;
    margin:auto;
}
main {
    padding: 10px;
    width:80%;
}
article {
    text-align: left;
}
table {
    border:2px solid black;
    border-radius: 5px;
    text-align: center;
    margin: auto;
    width:80%;
}
#top-row {
    font-weight: bold;
}
tr {
    font-size: smaller;
    vertical-align: top;
}
.codeText {
    font-family: 'Courier New', Courier, monospace;
}