index.css

:root {
	--spacing-default: 1.25rem;
	--spacing-large: 2.5rem;

    --color-white: #fff;
    --color-black: #000;

    --font-size-reduced: 0.875em;
    --font-size-default: 1em;
    --font-size-large: 2em;

    --font-face-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-face-monospace: Menlo, Consolas, monospace;
    --line-height: 1.5;

    --document-offset-top: 4rem;

    --column-width: 32rem;
}

* {
    box-sizing: border-box;
}

html {
    font-size: 100%;
}

@media (min-width: 568px) {
	html {
		font-size: 125%;
	}
}

@media (min-width: 768px) {
	html {
		font-size: 137.5%;
	}
}

@media (min-width: 1024px) {
	html {
		font-size: 150%;
	}
}

@media (min-width: 1440px) {
	html {
		font-size: 162.5%;
	}
}

@media (min-width: 1920px) {
	html {
		font-size: 200%;
	}
}

body {
    background: var(--color-white);
    font-family: var(--font-face-base);
    font-feature-settings: "kern", "liga", "ss01", "ss02", "cv06"; /* ss01=straight 6/9, ss02=open 4, ss07=single storey a, cv06=haakje aan l */
    -webkit-text-size-adjust: 100%;
    color: var(--color-black);
    line-height: var(--line-height);
    margin: 0 auto;
    padding: 0 var(--spacing-default) var(--spacing-large);
    max-width: var(--column-width);
    letter-spacing: 0.03em;
    word-break: break-word;
}

body > *:first-child {
	padding-top: var(--document-offset-top);
}

h1, h2, h3, h4, h5, h6 {
    font-size: 1em;
    font-weight: normal;
    margin: 0 0 1.25rem;
}

h1 {
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.875em;
}

h1 {
    font-size: var(--font-size-large);
    float: left;
    line-height: 1.2;
    letter-spacing: 4px;
    margin: 0 -50% 2.5rem 50%;
    transform: translateX(-50%);
    padding: 0.1875em 0.1875em 0.25em 0.25em;
    text-align: center;
    font-weight: 700;
}

h1::after {
    display: block;
    content: "";
    border-bottom: 5px solid black;
    max-width: 50%;
    margin: .75rem -50% 0 50%;
    transform: translateX(-50%);
}

h1 + * {
  clear: both;
}

code {
    font-family: var(--font-face-monospace);
    font-size: var(--font-size-reduced);
    padding: 0 0.3125em;
    background: #eee;
    color: black;
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
    -webkit-font-smoothing: antialiased;
    border-radius: 0.125em;
    color: #d00;
}

p code {
    /* white-space: nowrap; */
}

pre {
    background: hsla(0,0%,0%,0.875);
    padding: 0.5em;
    overflow-y: hidden;
    margin: 0 0 1.25rem;
}

pre code {
    background: none;
    border: 0;
    color: white;
}

b, strong {
    font-weight: bold;
    font-size: 0.9375em;
}

blockquote {
    position: relative;
    margin: 0 0 1.25rem;
    padding: 1.25rem;
    /*background: rgba(255, 240, 48, 0.3);*/
    background: #eee;
    /*background: rgba(255, 240, 48, 0.7);*/
}

blockquote code {
    background: white;
}


h2 {
    float: left;
    border-bottom: 1px solid black;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 0.9375em;
    margin: 1.25rem -50% .75rem 50%;
    transform: translateX(-50%);

}

h2::after,
h3::after {
    display: block;
    content: "";
    border-top: 1px solid #bbb;
    border-radius: 50%;
}

h2 + * {
  clear: both;
}

h2 + blockquote {
    margin-top: 6.25rem; /* quick fix. not ok. dit is omdat h2 float dus je duwt je marge eigenlijk tegen het element boven de h2 aan */
}

h3 {
    margin-bottom: 0.5rem;
    border-bottom: 1px solid black;
    float: left;
}

h3 + * {
    clear: both;
}

p {
    margin: 0 0 1.25rem;
}

p:last-child {
    margin-bottom: 0;
}

figure {
    display: block;
    margin: 0 0 1.25rem;
}

figcaption {
    padding: 1.25rem;
    background: #eee;
}

img {
    display: block;
    max-width: 100%;
    margin: 0 auto;
    padding: 1rem;
    border-radius: 0.125em;
}

a {
    padding: 0 0.0625em;
    background: transparent linear-gradient(to bottom, transparent 93%, black 97%, black 100%);
    text-shadow: 1px 1px 0 white, -1px 1px 0 white, 2px 0 0 white, -2px 0 0 white;
    text-decoration: none;
    color: black;
}

a:not(:empty)[href^=http]:after {
    content: " ↗"
}

a[href^="#"] {
    padding: 0 0.375em;
    background: rgba(255, 240, 48, 0.7);
    text-shadow: none;
    color: black;
}

a[href^="mailto"],
a[href^="tel"] {

}

a.silent {
    background: none;
    text-shadow: none;
    color: black;
}

a.icon {
    text-transform: lowercase;
}

a.icon::after {
    content: "_";
    animation: pulse 1s steps(2, start) infinite;
}

@keyframes pulse {
  to { visibility: hidden; }
}

sub,
sup {
    font-size: 0.75em;
    line-height: 1;
    vertical-align: 0;
}

sub {
    vertical-align: bottom;
}

sup {
    vertical-align: top;
}

del {
    opacity: 0.3;
    text-shadow: 1px 1px 0 white, -1px 1px 0 white, 2px 0 0 white, -2px 0 0 white;
}

del code {
    text-decoration: line-through;
    text-shadow: 1px 1px 0 black, -1px 1px 0 black, 2px 0 0 black, -2px 0 0 black;
}

hr {
    border: 0;
    background: transparent linear-gradient(to top, black 0, transparent 1.8px);
    height: 2px;
    width: 100%;
    margin: 2.5rem 0;
}

ul {
    margin: 0 0 1.25rem;
    padding: 0 0 0 1.25rem;
}

li {
    list-style: none;
}

li::before {
    display: inline-block;
    content: "•";
    content: "-";
    content: "*";
    content: "–";
    width: 1.25rem;
    margin-left: -1.25rem;
}

table {
    border-collapse: collapse;
    font-size: 0.75em;
    margin-bottom: 1.25rem;
    width: 100%;
}

thead tr {
    background: transparent linear-gradient(to top, black 0, transparent 1.8px, transparent 3px, black 3px, transparent 4.8px);
}

th,
td {
    font-feature-settings: "tnum";
    padding: 0.375rem 0.5rem;
    vertical-align: top;
}

th {
    padding-bottom: 0.5625rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 0.9375em;
    text-align: left;
}

tbody tr:first-child td {
    padding-top: 0.375rem;
}

tr:first-child td {
    border-top: none;
}

tr {
    background: transparent linear-gradient(to bottom, black 0, transparent 1.8px);
}

tbody tr:first-child {
    background: none;
}

td:first-child,
th:first-child {
    padding-left: 0;
}

td:last-child,
th:last-child {
    padding-right: 0;
}

.task-list-item {
    list-style: none;
    margin-left: -1.25rem;
}

.task-list-item--checked {
    text-decoration: line-through;
    text-shadow: 1px 1px 0 white, -1px 1px 0 white, 2px 0 0 white, -2px 0 0 white;
}

.task-list-item-checkbox {
    overflow: hidden;
    position: absolute;
    margin: -1px;
    padding: 0;
    width: 1px;
    height: 1px;
    border: 0;
    clip: rect(0 0 0 0);
}

.task-list-item::before {
    display: inline-block;
    content: "☐";
    width: 0.6875rem;
    height: 0.6875rem;
}

.task-list-item--checked::before {
    content: "☑";
}

/** Prism */

.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
    color: #736f70; /** gray */
}

.token.punctuation {
    color: #e3dfe0; /** off white */
}

.namespace {
    color: #e74d3b; /** red */
}

.token.property {
    color: #00aeef; /** cyan */
}

.token.constant,
.token.symbol,
.token.deleted {
    color: #a1d820; /** green */
}

.token.boolean,
.token.number {
    color: #e74d3b; /** red */
}

.token.tag {
    color: #e74d3b; /** red */
}

.token.selector {
    color: #a1d820; /** green */
}

.token.attr-name {
    color: #a1d820; /** green */
}

.token.string {
    color: #f1c40e; /** yellow */
}

.token.char,
.token.builtin,
.token.inserted {
    color: #00aeef; /** cyan */
}

.token.operator,
.token.entity,
.token.url,
.language-css .token.string,
.style .token.string,
.token.variable {
    color: #f1c40e; /** yellow */
}

.token.atrule,
.token.attr-value {
    color: #f1c40e; /** yellow */
}

.token.function {
    color: #a1d820; /** green */
}

.token.keyword {
    color: #00aeef; /** cyan */
}

.token.regex {
    color: #e74d3b; /** red */
}

.token.important {
    color: #e74d3b; /** cyan */
}

.token.regex {
    font-style: italic;
}

.token.important,
.token.bold {
    font-weight: bold;
}

.token.italic {
    font-style: italic;
}

.token.entity {
    cursor: help;
}