flow-website/assets/css/index.css

@font-face {
  font-family: 'Iosevka';
  src: url('../fonts/Iosevka-Regular.woff2') format('woff2');
}

@font-face {
  font-family: 'AcPlus IBM VGA 9x16';
  src: url('../fonts/AcPlus_IBM_VGA_9x16.ttf') format('truetype');
  font-weight: 600;
}

:root {
  --font-family: "Iosevka", "NerdFontsSymbols Nerd Font", monospace;
  --font-family-titles: "AcPlus IBM VGA 9x16", "NerdFontsSymbols Nerd Font", monospace;
  --line-height: 2.00rem;
  --border-thickness: 2px;
  --text-color: #333;
  --text-color-alt: #666;
  --text-color-accent: #000;
  --background-color: #fff;
  --background-color-alt: #eee;

  --font-weight-normal: 500;
  --font-weight-medium: 600;
  --font-weight-bold: 800;
  --font-weight-titles: 600;

  font-family: var(--font-family);
  font-optical-sizing: auto;
  font-weight: var(--font-weight-normal);
  font-style: normal;
  font-variant-numeric: tabular-nums lining-nums;
  font-size: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text-color: #aaa;
    --text-color-alt: #898;
    --text-color-accent: #ddd;
    --background-color: #222;
    --background-color-alt: #111;
  }
}

* {
  box-sizing: border-box;
}


*+* {
  margin-top: var(--line-height);
}

html {
  display: flex;
  width: 100%;
  margin: 0;
  padding: 0;
  flex-direction: column;
  align-items: center;
  background: var(--background-color);
  color: var(--text-color);
}

body {
  position: relative;
  width: 100%;
  margin: 0;
  padding: var(--line-height) 2ch;
  max-width: calc(min(100ch, round(down, 100%, 1ch)));
  line-height: var(--line-height);
  overflow-x: hidden;
}

@media screen and (max-width: 480px) {
  :root {
    font-size: 14px;
  }

  body {
    padding: var(--line-height) 1ch;
  }
}

@media screen and (max-width: 1300px) {
  .top-container {
    display: none;
  }

  .bottom-container {
    display: none;
  }
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-titles);
  font-weight: var(--font-weight-titles);
  margin: calc(var(--line-height) * 2) 0 var(--line-height);
  line-height: 1.2em;
  color: var(--text-color-accent);
}

h1 {
  font-size: 6rem;
  line-height: calc(2 * var(--line-height));
  margin-bottom: calc(var(--line-height) * 2);
}

h2 {
  font-size: 3rem;
}

h3 {
  font-size: 2rem;
}

h4 {
  font-size: 1.6rem;
}

:is(h1, h2, h3, h4, h5, h6) a {
  text-decoration: none;
  cursor: default;
}

hr {
  position: relative;
  display: block;
  height: var(--line-height);
  margin: calc(var(--line-height) * 1.5) 0;
  border: none;
  color: var(--text-color);
}

hr:after {
  display: block;
  content: "";
  position: absolute;
  top: calc(var(--line-height) / 2 - var(--border-thickness));
  left: 0;
  width: 100%;
  border-top: calc(var(--border-thickness) * 3) double var(--text-color);
  height: 0;
}

a {
  text-decoration-thickness: var(--border-thickness);
}

a:link,
a:visited {
  color: var(--text-color);
}

p {
  margin-bottom: var(--line-height);
}

strong {
  font-weight: var(--font-weight-bold);
}

em {
  font-style: italic;
}

sub {
  position: relative;
  display: inline-block;
  margin: 0;
  vertical-align: sub;
  line-height: 0;
  width: calc(1ch / 0.75);
  font-size: .75rem;
}

table {
  position: relative;
  top: calc(var(--line-height) / 2);
  width: calc(round(down, 100%, 1ch));
  border-collapse: collapse;
  margin: 0 0 calc(var(--line-height) * 2);
}

th,
td {
  border: var(--border-thickness) solid var(--text-color);
  padding:
    calc((var(--line-height) / 2)) calc(1ch - var(--border-thickness) / 2) calc((var(--line-height) / 2) - (var(--border-thickness)));
  line-height: var(--line-height);
  vertical-align: top;
  text-align: left;
}

table tbody tr:first-child>* {
  padding-top: calc((var(--line-height) / 2) - var(--border-thickness));
}


th {
  font-weight: 700;
}

.width-min {
  width: 0%;
}

.width-auto {
  width: 100%;
}

.header {
  margin-bottom: calc(var(--line-height) * 2);
}

.header h1 {
  margin: 0;
}

.header tr td:last-child {
  text-align: right;
}

p {
  word-break: break-word;
  word-wrap: break-word;
  hyphens: auto;
}

img,
video {
  display: block;
  width: 100%;
  object-fit: contain;
  overflow: hidden;
}

img {
  font-style: italic;
  color: var(--text-color-alt);
}

details {
  border: var(--border-thickness) solid var(--text-color);
  padding: calc(var(--line-height) - var(--border-thickness)) 1ch;
  margin-bottom: var(--line-height);
}

summary {
  font-weight: var(--font-weight-medium);
  cursor: pointer;
}

details[open] summary {
  margin-bottom: var(--line-height);
}

details ::marker {
  display: inline-block;
  content: '▶';
  margin: 0;
}

details[open] ::marker {
  content: '▼';
}

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

pre {
  white-space: pre;
  overflow-x: auto;
  margin: 10px;
  padding: 10px;
  background: var(--background-color-alt);
  overflow-y: hidden;
  color: var(--text-color-alt);
}

figure pre {
  margin: 0;
}

pre,
code {
  font-family: var(--font-family-alt);
}

code {
  font-weight: var(--font-weight-medium);
}

figure {
  margin: calc(var(--line-height) * 2) 3ch;
  overflow-x: auto;
  overflow-y: hidden;
}

figcaption {
  display: block;
  font-style: italic;
  margin-top: var(--line-height);
}

ul,
ol {
  padding: 0;
  margin: var(--line-height) 0 var(--line-height);
}

ul {
  list-style-type: square;
  padding: 0 0 0 2ch;
}

ol {
  list-style-type: none;
  counter-reset: item;
  padding: 0;
}

ol ul,
ol ol,
ul ol,
ul ul {
  padding: 0 0 0 3ch;
  margin: 0;
}

ol li:before {
  content: counters(item, ".") ". ";
  counter-increment: item;
  font-weight: var(--font-weight-medium);
}

li {
  margin: 0;
  padding: 0;
}

li::marker {
  line-height: 0;
}

::-webkit-scrollbar {
  height: var(--line-height);
}

input,
button,
textarea {
  border: var(--border-thickness) solid var(--text-color);
  padding:
    calc(var(--line-height) / 2 - var(--border-thickness)) calc(1ch - var(--border-thickness));
  margin: 0;
  font: inherit;
  font-weight: inherit;
  height: calc(var(--line-height) * 2);
  width: auto;
  overflow: visible;
  background: var(--background-color);
  color: var(--text-color);
  line-height: normal;
  -webkit-font-smoothing: inherit;
  -moz-osx-font-smoothing: inherit;
  -webkit-appearance: none;
  appearance: none;
}

input[type=checkbox] {
  display: inline-grid;
  place-content: center;
  vertical-align: top;
  width: 2ch;
  height: var(--line-height);
  cursor: pointer;
}

input[type=checkbox]:checked:before {
  content: "";
  width: 1ch;
  height: calc(var(--line-height) / 2);
  background: var(--text-color);
}

button:focus,
input:focus {
  --border-thickness: 3px;
  outline: none;
}

input {
  width: calc(round(down, 100%, 1ch));
}

::placeholder {
  color: var(--text-color-alt);
  opacity: 1;
}

::-ms-input-placeholder {
  color: var(--text-color-alt);
}

button::-moz-focus-inner {
  padding: 0;
  border: 0
}

button {
  font-weight: var(--font-weight-medium);
  cursor: pointer;
}

button:hover {
  background: var(--background-color-alt);
}

button:active {
  transform: translate(2px, 2px);
}

label {
  display: block;
  width: calc(round(down, 100%, 1ch));
  height: auto;
  line-height: var(--line-height);
  font-weight: var(--font-weight-medium);
  margin: 0;
}

label input {
  width: 100%;
}

.tree p {
  margin-bottom: 0px;
}

.tree {
  padding: 10px;
  position: relative;
  list-style-type: none;
  line-height: var(--line-height);
  background: var(--background-color-alt);
}

.tree ul {
  margin: 0;
  padding: 0;
  position: relative;
  list-style-type: none;
  line-height: var(--line-height);
  background: var(--background-color-alt);
}

.tree ul li {
  position: relative;
  padding-left: 1.5ch;
  margin-left: 1.5ch;
  border-left: var(--border-thickness) solid var(--text-color);
}

.tree ul li:before {
  position: absolute;
  display: block;
  top: calc(var(--line-height) / 2);
  left: 0;
  content: "";
  width: 1ch;
  border-bottom: var(--border-thickness) solid var(--text-color);
}

.tree ul li:last-child {
  border-left: none;
}

.tree ul li:last-child:after {
  position: absolute;
  display: block;
  top: 0;
  left: 0;
  content: "";
  height: calc(var(--line-height) / 2);
  border-left: var(--border-thickness) solid var(--text-color);
}

.grid {
  --grid-cells: 0;
  display: flex;
  gap: 1ch;
  width: calc(round(down, 100%, (1ch * var(--grid-cells)) - (1ch * var(--grid-cells) - 1)));
  margin-bottom: var(--line-height);
}

.grid>*,
.grid>input {
  flex: 0 0 calc(round(down, (100% - (1ch * (var(--grid-cells) - 1))) / var(--grid-cells), 1ch));
}

.grid:has(> :last-child:nth-child(1)) {
  --grid-cells: 1;
}

.grid:has(> :last-child:nth-child(2)) {
  --grid-cells: 2;
}

.grid:has(> :last-child:nth-child(3)) {
  --grid-cells: 3;
}

.grid:has(> :last-child:nth-child(4)) {
  --grid-cells: 4;
}

.grid:has(> :last-child:nth-child(5)) {
  --grid-cells: 5;
}

.grid:has(> :last-child:nth-child(6)) {
  --grid-cells: 6;
}

.grid:has(> :last-child:nth-child(7)) {
  --grid-cells: 7;
}

.grid:has(> :last-child:nth-child(8)) {
  --grid-cells: 8;
}

.grid:has(> :last-child:nth-child(9)) {
  --grid-cells: 9;
}

/* DEBUG UTILITIES */

.debug .debug-grid {
  --color: color-mix(in srgb, var(--text-color) 10%, var(--background-color) 90%);
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  background-image:
    repeating-linear-gradient(var(--color) 0 1px, transparent 1px 100%),
    repeating-linear-gradient(90deg, var(--color) 0 1px, transparent 1px 100%);
  background-size: 1ch var(--line-height);
  margin: 0;
}

.debug .off-grid {
  background: rgba(255, 0, 0, 0.1);
}

.debug-toggle-label {
  text-align: right;
}

div nav {
  text-align: right;
}

div.tutnav p {
  text-align: center;
}

div.toc a {
  text-decoration: none;
}

div.toc a:hover {
  color: var(--text-color-accent);
}

div.toc>ul>li,
div.toc>ul {
  list-style-type: none;
  padding: 0px;
  margin: 0px;
}

div.toc>ul>li::marker {
  content: "";
}

div.toc li::marker {
  content: "» ";
  font-weight: bold;
}

.vertical-text {
  margin-top: 35px;
  writing-mode: vertical-lr;
  text-orientation: upright;
  white-space: nowrap;
  color: var(--color-accent);
  font-size: 1.6em;
  font-family: 'AcPlus IBM VGA 9x16';
}

.vertical-text a {
  text-decoration: none;
}

.vertical-text a:hover {
  color: var(--text-color-accent);
}

.toc-container {
  display: flex;
  gap: 10px;
  margin: 0px;
  padding: 0px;
}

.top-container {
  margin: 0px;
  padding: 0px;
  position: fixed;
  top: 10px;
  left: 10px;
  width: 280px;
}

.bottom-container {
  position: fixed;
  bottom: 0;
  left: 850px;
  display: flex;
  flex-direction: column-reverse;
  /* Stacks items from bottom up */
  align-items: flex-end;
  padding: 10px;
  max-height: 80vh;
  /* Limits the container height to prevent it from overflowing the viewport */
  width: 300px;
  overflow-y: auto;
}

.bottom-container ul {
  float: right;
  /* Right-aligns the entire list */
  list-style: none;
  /* Removes default bullets */
  padding-left: 0;
  /* Removes default indentation */
}

.bottom-container li {
  margin-bottom: 0.5em;
  /* Spacing between list items */
  padding-right: 1em;
  /* Spacing for potential custom right-aligned bullets */
  text-align: right;
  /* Aligns text within each list item to the right */
}

.bottom-container a {
  text-decoration: none;
}

.bottom-container a:hover {
  color: var(--text-color-accent);
}

.top-container h1 {
  margin: 0px;
  padding: 0px;
  padding-left: 5px;
  padding-top: 10px;
}