body {
    background-color: rgb(243, 243, 243);
    color: black;
    margin: 0px;
    padding: 0px;
    font-family: Arial, Helvetica, sans-serif;
    text-align: center;
}

nav {
    background-color: rgb(207,214,220);
}

nav ul {
    margin: 0px;
    padding: 0px;
    list-style-type: none;
}

nav ul li {
    display: inline-block;
    margin: 20px;
    padding: 7px;
}

nav ul li a {
    color: black;
    text-decoration: none;
}

nav ul li a:hover {
    text-decoration: underline;
}

header {
    padding: 20px;
}

header h1 {
    font-size: 40px;
}

header h2 {
    font-size: 20px;
    font-style: italic;
}

section.sites {
    background-color: rgb(207,214,220);
    padding: 20px;
}

section.sites ul {
    margin: 0px;
    padding: 0px;
    list-style-type: none;
    display: inline-flex;
}

section.sites ul li a {
    color: black;
    text-decoration: none;
}

section.sites ul li a:hover {
    text-decoration: underline;
}

section.sites ul li a img {
    width: 75%;
    height: auto;
}

section.facts1 {
    padding: 20px;
}

section.facts2 {
    background-color: rgb(207,214,220);
    padding: 20px;
}
section.facts3 {
    padding: 20px;
}

section.facts4 {
    background-color: rgb(207,214,220);
    padding: 20px;
}