i know it is a lot

assets/css/atom.scss

@@ -0,0 +1,84 @@
+/* layout */
+.container {
+  max-width: var(--max-w);
+}
+
+.overflow-x-auto {
+  overflow-x: auto;
+}
+
+.overflow-y-hidden {
+  overflow-y: hidden;
+}
+
+/* flex & grid */
+.flex {
+  display: flex;
+}
+
+.flex-row {
+  flex-direction: row;
+}
+
+.flex-column {
+  flex-direction: column;
+}
+
+.justify-between {
+  justify-content: space-between;
+}
+
+.items-center {
+  align-items: center;
+}
+
+.items-start {
+  align-items: flex-start;
+}
+
+.items-baseline {
+  align-items: baseline;
+}
+
+/* spacing */
+$u: 0.25;
+@each $i, $class in (p, padding), (m, margin) {
+  @each $j, $size in (t, top), (r, right), (b, bottom), (l, left) {
+    @each $k in 0,1,2,3,4,5,6,7,8 {
+      .#{$i}#{$j}-#{$k} {
+        #{$class}-#{$size}: #{$u * $k}rem;
+      }
+    }
+  }
+}
+
+.mx-auto {
+  margin-left: auto;
+  margin-right: auto;
+}
+
+/* typography */
+$weights: (thin, 100), (extralight, 200), (light, 300), (normal, 400), 
+          (medium, 500), (semibold, 600), (bold, 700), (extrabold, 800);
+@each $k, $v in $weights {
+  .font-#{$k} {
+    font-weight: #{$v};
+  }
+}
+
+$texts: (xs, 0.75), (sm, 0.875), (base, 1), (lg, 1.125), (xl, 1.25),
+        (2xl, 1.5), (3xl, 1.875), (4xl, 2.25), (5xl, 3), (6xl, 3.75);
+@each $k, $s in $texts {
+  .text-#{$k} {
+    font-size: #{$s}rem;
+  }
+}
+
+.whitespace-nowrap {
+  white-space: nowrap;
+}
+
+/* interactivity */
+.cursor-pointer {
+  cursor: pointer;
+}

assets/css/main.scss

@@ -0,0 +1,58 @@
+@import "./pre.scss";
+@import "./theme.scss";
+@import "./atom.scss";
+@import "./md.scss";
+@import "./syntax.scss";
+
+:root {
+  --max-w: 640px;
+  --nav-s: 1.5rem;
+  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu,
+    Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
+  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
+}
+
+@media screen and (min-width: 480px) {
+  :root {
+    --nav-s: .5rem;
+  }
+}
+
+
+html {
+  font-size: 16px;
+  -webkit-text-size-adjust: 100%;
+  -ms-overflow-style: -ms-autohiding-scrollbar;
+  box-sizing: border-box;
+  border-collapse: collapse;
+}
+
+body {
+  margin: 0 16px;
+  font-family: var(--font);
+  font-weight: 400;
+  background-color: var(--back);
+  color: var(--text);
+  transition-property: background-color, border-color, color;
+  transition-duration: 0.5s;
+}
+
+main {
+  animation: showup 0.7s;
+}
+
+main p a {
+  color: var(--prime);
+}
+
+@keyframes showup {
+  from {
+    opacity: 0;
+    transform: translateY(20px);
+  }
+
+  to {
+    opacity: 1;
+    transform: none;
+  }
+}

assets/css/md.scss

@@ -0,0 +1,101 @@
+$heading: (h1, 2.25, 800), (h2, 2, 700), (h3, 1.75, 600), (h4, 1.5, 600),
+           (h5, 1.25, 500), (h6, 1, 400);
+@each $tag, $size, $weight in $heading {
+  .md #{$tag} {
+    font-size: #{$size}rem;
+    font-weight: $weight;
+    margin-top: 1rem;
+    margin-bottom: .75rem;
+  }
+}
+
+.md pre {
+  font-size: 13px;
+  line-height: 1.3;
+}
+
+.md blockquote {
+  background-color: #94949514;
+  padding: 1px .85em;
+  border-left: 4px solid var(--prime);
+  font-style: italic;
+}
+
+.md table {
+  border-collapse: collapse;
+  border-spacing: 0;
+  display: block;
+  max-width: 100%;
+  width: 100%;
+  margin: 1em 0;
+  overflow: auto;
+}
+
+.md table thead {
+  border-top: 2px solid var(--text);
+  border-bottom: 1px solid var(--text);
+}
+
+.md table tbody {
+  border-bottom: 2px solid var(--text);
+}
+
+.md table th,
+.md table td {
+  padding: .25rem 1rem;
+}
+
+.md img {
+  max-width: 100%;
+}
+
+.md .katex {
+  overflow: auto hidden;
+}
+
+.md ul {
+  list-style: disc;
+  padding-inline-start: 22px;
+}
+
+.md ul input[type="checkbox"] {
+  margin: 0;
+  margin-right: 3px;
+}
+
+.md .ul-checkbox {
+  list-style: none;
+  padding-inline-start: 2px;
+}
+
+.md li {
+  margin-bottom: .5rem;
+  line-height: 1.5;
+}
+
+.md ol,
+.md ul,
+.md img,
+.md blockquote,
+.md .highlight {
+  margin: .75rem 0;
+}
+
+.md blockquote p {
+  margin: .45rem 0;
+  line-height: 1.5;
+  font-size: .95rem;
+}
+
+.md hr {
+  margin: 1.5rem 0;
+}
+
+.md .footnotes {
+  word-break: break-all;
+  font-size: .9rem;
+}
+
+.md p sup {
+  margin-left: 4px;
+}

assets/css/pre.scss

@@ -0,0 +1,134 @@
+/* This file is taken from https://github.com/tailwindlabs/tailwindcss/blob/master/src/css/preflight.css */
+
+/*
+1. Use a consistent sensible line-height in all browsers.
+2. Prevent adjustments of font size after orientation changes in iOS.
+3. Use a more readable tab size.
+4. Use the user's configured `sans` font-family by default.
+5. Use the user's configured `sans` font-feature-settings by default.
+*/
+html {
+  --default-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu,
+    Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
+  line-height: 1.5;
+  font-family: var(--font, --default-font);
+  font-feature-settings: normal;
+}
+
+
+/*
+1. Remove the margin in all browsers.
+2. Inherit line-height from `html` so users can set them as a class directly on the `html` element.
+*/
+body {
+  margin: 0;
+  line-height: inherit;
+}
+
+/*
+1. Add the correct height in Firefox.
+2. Correct the inheritance of border color in Firefox. (https://bugzilla.mozilla.org/show_bug.cgi?id=190655)
+3. Ensure horizontal rules are visible by default.
+*/
+hr {
+  height: 0; /* 1 */
+  color: inherit; /* 2 */
+  border-top-width: 1px; /* 3 */
+}
+
+/*
+Remove the default font size and weight for headings.
+*/
+p,
+pre,
+figure,
+dl,
+dd,
+blockquote,
+h1,
+h2,
+h3,
+h4,
+h5,
+h6 {
+  margin: 0;
+  font-size: inherit;
+  font-weight: inherit;
+}
+
+.tag,
+p code {
+  font-size: .8em;
+  padding: 0.1em 0.3em;
+  border-radius: 1px;
+  background-color: #9999993b;
+}
+
+
+ol,
+ul,
+menu {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+}
+
+/*
+Reset links to optimize for opt-in styling instead of opt-out.
+*/
+a {
+  color: inherit;
+  text-decoration: inherit;
+}
+
+a:hover {
+  color: var(--prime, inherit);
+}
+
+/*
+1. Use the user's configured `mono` font family by default.
+2. Correct the odd `em` font sizing in all browsers.
+*/
+
+code,
+kbd,
+samp,
+pre {
+  --default-font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
+  font-family: var(--font-mono, --default-font-mono);
+}
+
+/*
+1. Remove text indentation from table contents in Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=999088, https://bugs.webkit.org/show_bug.cgi?id=201297)
+2. Correct table border color inheritance in all Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=935729, https://bugs.webkit.org/show_bug.cgi?id=195016)
+3. Remove gaps between table borders by default.
+*/
+table {
+  text-indent: 0; /* 1 */
+  border-color: inherit; /* 2 */
+  border-collapse: collapse; /* 3 */
+}
+
+/*
+Remove the inheritance of text transform in Edge and Firefox.
+*/
+button,
+select {
+  text-transform: none;
+}
+
+::-webkit-scrollbar {
+  width: 4px;
+  height: 4px;
+}
+
+::-webkit-scrollbar-thumb {
+  background: rgba(128, 128, 128, 0.7);
+}
+::-webkit-scrollbar-thumb:window-inactive {
+  background: rgba(128, 128, 128, 0.2);
+}
+
+::-webkit-scrollbar-thumb:active {
+  background-color: rgb(128, 128, 128);
+}

assets/css/syntax.scss

@@ -0,0 +1,142 @@
+.chroma code {
+  color: #d4d4d4;
+}
+
+.chroma {
+  background-color: #292929;
+  margin: .5em 0;
+}
+
+/* LineTableTD */
+.chroma .lntd {
+  vertical-align: top;
+  padding: 0;
+  margin: 0;
+  border: 0;
+}
+
+.chroma .lntable tbody {
+  border: 0;
+}
+
+.chroma .lntable td:nth-child(2) {
+  width: 100%;
+}
+
+.chroma .lnt,
+.chroma .line {
+  display: block;
+  line-height: 1.3;
+}
+
+/* LineNumbersTable */
+.chroma .lnt {
+  color: #999;
+  padding-left: .9em;
+  padding-right: 1em;
+  text-align: right;
+}
+
+.chroma .hl .lnt {
+  display: inline;
+}
+
+/* Keyword */
+.chroma .kc,
+.chroma .kd,
+.chroma .kn,
+.chroma .kp,
+.chroma .kr,
+// .chroma .kt,
+.chroma .k,
+.chroma .si {
+  color: #569cd6;
+}
+
+.chroma .na {
+  color: #9cdcfe;
+}
+
+// .chroma .n,
+.chroma .nb,
+.chroma .bp,
+// .chroma .nc,
+.chroma .no,
+.chroma .nd,
+.chroma .ni,
+.chroma .ne,
+// .chroma .nf,
+.chroma .fm,
+.chroma .nl,
+.chroma .nn {
+  color: #569cd6;
+}
+
+/* NameProperty */
+.chroma .py,
+.chroma .nt,
+.chroma .nv,
+.chroma .vc,
+.chroma .vg,
+.chroma .vi,
+.chroma .vm {
+  color: #569cd6;
+}
+
+/* LiteralString */
+.chroma .s,
+.chroma .sa,
+.chroma .sb,
+.chroma .sc,
+.chroma .dl,
+.chroma .sd,
+.chroma .s2,
+.chroma .se,
+.chroma .sh,
+.chroma .sx,
+.chroma .sr,
+.chroma .s1,
+.chroma .ss,
+.chroma .cpf {
+  color: #ce9178;
+}
+
+/* LiteralNumber */
+.chroma .m,
+.chroma .mb,
+.chroma .mf,
+.chroma .mh,
+.chroma .mi,
+.chroma .il,
+.chroma .mo {
+  color: #b5cea8;
+}
+
+/* Comment */
+.chroma .c,
+.chroma .ch,
+.chroma .cm,
+.chroma .c1,
+.chroma .cs {
+  color: #517043;
+}
+
+.chroma .nb,
+.chroma .kt {
+  color: #4ec9b0;
+}
+
+.chroma .fm,
+.chroma .nf {
+  color: #dcdcaa;
+}
+
+
+.chroma .cp {
+  color: #c586c0;
+}
+
+.chroma .hl {
+  display: block;
+  background-color: #585858;
+}

assets/css/theme.scss

@@ -0,0 +1,13 @@
+.light {
+  --prime: #1691b6;
+  --grid: #e1e1e1;
+  --back: #fff;
+  --text: #222;
+}
+
+.dark {
+  --prime: #1691b6;
+  --back: #181818;
+  --text: silver;
+  --grid: #555;
+}