h1 {
    background-color: black;
    color: white;
}
h2 {
    background-color: lightskyblue;
}
h3 {
    color: lightcoral;
}
table {
            border-collapse: collapse;
            width: 100%;
}
th, td {
            border: 1px solid black;
            padding: 8px;
            text-align: center;
            width: 8%;
}
th, tr:nth-child(odd)  {
            background-color: #BBBBBB;
}
head, body {
            font-family: Arial, sans-serif;
}

body {
        display: grid;
        grid-template-columns: 100px auto;
}

header {
        grid-column-start: 1;
        grid-column-end: 3;
        grid-row-start: 1;
        grid-row-end: 2;
}

section {
    grid-column: 1 / 2;
    grid-row: 2 / 3;
}

nav {
    grid-column: 2 / 3;
    grid-row: 2 / 3;
}

footer {
    grid-column: 1 / 3;
    grid-row-start: 3 / span 1;
}