* {
    box-sizing: border-box;
}

body {
    background-color: #2c2c2c;
}

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

h1 {
    margin: none;
    color: white;
    text-align: center;
    line-height: 2em;
}

@media only screen and (max-width: 720px) {
    header {
        font-size: 150%;
    }
}

@media only screen and (min-width: 721px) {
    header {
        font-size: 200%;
    }
}

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

table {
    color: white;
    margin-left: auto;
    margin-right: auto;
}

td, th {
  border: 1px solid #ddd;
  padding: 8px;
}

th {
  padding-top: 12px;
  padding-bottom: 12px;
  text-align: center;
  background-color: red;
  color: white;
}