* {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #f4f4f4;
    padding: 20px;
    position: relative;
    background: linear-gradient(to right, #999999 0%, #f4f4f4 40%, #f4f4f4 60%, #999999 100%);
}

.container {
    width: 80%;
    margin: 0 auto;
}

nav {
    background-color: #333;
    overflow: hidden;
    text-align: center;
    border: 1px solid black;
}

#h,
#n {
    display: inline-block;
    color: white;
    text-decoration: none;
    padding: 17px 20px;
}

#h:hover {
    background-color: #ddd;
    color: black;
}

section {
    padding: 20px;
    text-align: center;
    position: relative;
}

section * {
    font-family: Georgia, serif;
}

aside {
    margin-left: auto;
    margin-right: auto;
    display: block;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto 20px;
    width: 600px;
    border: 1px solid black;
}

ul,
ol {
    display: inline-block;
    margin: 0 auto 20px;
    text-align: left;
}

table {
    margin: 0 auto;
    border-collapse: collapse;
    width: 50%;
}

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

header {
    background-color: black;
    color: white;
    padding: 20px;
    text-align: center;
}

footer {
    text-align: center;
}

p,
a,
h3,
h4,
em {
    margin: 20px;
}