body {
    font-family: Arial, Helvetica, sans-serif;
    max-width: 50rem;
    margin: 0 auto;
    padding: 1rem;
    line-height: 1.75rem;
    background: #FAFFFF;
}
h1,h2,h3,h4,h5,h6 {
    line-height: normal;
}
h1,h2,h3,h4,h5,h6,a {
    color: #07bbbc;
}
header {
    padding: 1.25rem 0 0;
}
header>* {
    margin: 0;
}
nav {
    display: flex;
    align-items: center;
}
nav .logo {
    margin-right: auto;
}
header nav nav a {
    font-size: 1.1rem;
    padding: 0 .5rem;
    background: #07bcbc17;
    margin: 0 .25rem;
    border-radius: 5rem;
}
img,video {
    max-width: 100%;
}
pre {
    overflow: auto;
}
footer {
    margin-top: 2rem;
    line-height: 1.2rem;
}