style.css

/* Reset */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

/* Variables */

:root {
    --eggshell: #fafafa;
    --mine-shaft: #212121;
    --border-size: 1rem;
}

/* Typo */

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    background: var(--eggshell);
    color: var(--mine-shaft);
    font-size: 5vh;
    line-height: 1.5;
}

main {
    height: 100vh;
    outline: solid 3px blue;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
    display: flex;
    flex-direction: column;
}

.horizontal {
    flex-direction: row;
}

h1, h2, h3, h4, h5 {
    line-height: 1;
    max-width: 80%;
    padding-bottom: 1rem;
}

/* The usual */

ul {
    margin-left: 2rem;
}

img {
    max-width: 100%;
}

blockquote {
    font-style: italic;
}

/* Slides */

section {
    min-width: 100vw;
    min-height: 100vh;
    padding: 5rem;
    outline: dotted 1px var(--mine-shaft);
    scroll-snap-align: start;
}

section > * + * {
    margin-top: 2rem;
}