* {
    margin: 0; padding: 0; border: 0; box-sizing: border-box;
}

body {
    background-color: seagreen; color: seashell;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 1em;
}

h1 {
    text-align: center; font-weight: normal; font-size: 4em;
    background-color: violet; padding: 8px;
    margin-top: 8px; padding: 8px;
}

h1 span {
    color: blue; font-weight: bold;
    text-shadow: 2px 2px black;
}

h1 + p {
    text-align: center; font-size: 3em; letter-spacing: .5em;
    color: seashell;
    background-color: violet; padding: 8px;
}

h2 {
    margin-top: 1.5em; margin-bottom: 1em;
}

img {
    width: 300px; float: right; margin: 12px 0px 24px 24px;
}

nav {
    margin-top: 48px;
}

nav a {
    display: block; margin-bottom: 8px;
    font-size: 1.4em;
    text-decoration: none;
}

a:hover {
    color: wheat;
}

a, code, pre {
    font-family: monospace;
}

section#main {
    display: flex; flex-flow: row wrap;
    justify-content: center;
}

section#main article {
    flex: 0 0 40%;
    background-color: black; color: blanchedalmond;
    margin: 24px; padding: 8px;
}

article h2 {
    text-align: center; color: white;
}

table {
    border: 2px solid black;
}

table th, table td {
    border: 2px solid black;
    text-align: left; vertical-align: top;
    padding: 1em;
}