* {
    box-sizing: border-box;
    margin: 0;
}
body {
    font-size: 1.25rem;
    margin: 1rem;
    max-width: 60rem;
}
a {
    font-size: 1.25rem;
}
header {
    margin-bottom: 1rem;
}
.subtitle {
    font-size: 1.5rem;
    font-weight: bold;
}
nav {
    border-bottom: 1px solid black;
    border-top: 1px solid black;
    display: flex;
    margin: 1rem 0;
    padding: 0.5rem 0;
}
nav > a {
    padding-right: clamp(1rem, 2.5vw, 2rem);
    text-decoration: none;
}
.social-icon {
    margin-right: .5rem;
    vertical-align: middle;
}
main {
    margin: 1rem 0;
}
h1 {
    font-size: 3rem;
}
h2 {
    font-size: 2.5rem;
}
h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}
p:not(.subtitle) {
    margin-bottom: 1rem;
}
footer {
    border-top: 1px solid black;
    padding: 1rem 0;
}
footer a {
    margin-right: 1rem;
    text-decoration:  none;
}