style.css

body {
    font-family: verdana;
}

table {
    margin: 20px;
    border-spacing: 0;
}

td {
    border: 1px solid grey;
    margin: 0;
    padding: 5px;
}

header {
    height: 120px;
    background-color: #999;
}

h1, h2 {
    padding: 20px;
}

h2 {
    font-size: 1.2em
}

/* button#delete {
    visibility: hidden;
} */

.hidden {
    visibility: hidden;
}

form {
    background-color: #666;
    padding: 20px;
    padding-left: 220px;
}

main {
    width: 800px;
    background-color: yellow;
    margin: auto;
}

nav {
    width: 200px;
    background-color: grey;
    float: left;
}

article {
    background-color: #ccc;
}