html, body {
    margin: 0;
    padding: 0;
    font-size: 20px;
    box-sizing: border-box;

}
body {
    background: black;
    color: #00ff00;
}

main {
    padding: 1rem;
    max-width: 46rem;
    margin: auto;
}

h1,h2,h3, h4 {
    color: #FF00FF;
}

p {
    font-size: 1rem;
}

h3 {
    font-size: 1.3rem;
    margin-bottom: 0;
}

h4 {
    margin-top: 0.5rem;
    font-size: 1.1rem;
}

h1, h2 {
    text-align: center;
}

h1 {
    border: 1rem ridge gray;
    padding: 0.5rem;
}

h2 {
    border-bottom: 0.5rem ridge gray;
    padding-bottom: 0.5rem;
}

a {
    color: aliceblue;
}

a:visited {
    color: pink;
}

a:hover {
    color: cornflowerblue;
}

footer {
    margin-top: 2rem;
    margin-bottom: 3rem;
}