$gray: #757575;
$white: #fff;

body {
    width: 750px;
    border: 1px solid $gray;
    margin: 20px auto;
    color: $gray;
}

nav, footer {
    background-color: $gray;
    color: $white;
    height: 20px;
    line-height: 20px;
    padding: 5px;
}

header {
    h1 {
        margin: .67em;
    }
}

nav {
}

main {
    min-height:300px;

    table {
        margin: 10px;
        width: 730px;
        tbody {
            border: 1px solid $gray;

        }
        tr {
            border-bottom: 1px solid $gray;
            th {
                text-align: left;
                padding: 20px;
                font-size: 1.5em;
            }
            td {
                padding: 10px;
                width: 30%;
            }
            td + td {
                width: 70%;
            }
        }
    }
}

footer {
    text-align: center;
}