@import url("https://fonts.googleapis.com/css2?family=Recursive:MONO@1&family=Open+Sans:wght@300..800&display=swap");

:root {
  color-scheme: dark;
  --color-bg: #d0d1d7;
  --color-bg-lc: #c2c4cb;
  --color-bg-hc: #dedfe3;
  --color-bg-ok: #4b850f44;
  --color-bg-warning: #c9790044;
  --color-bg-error: #b3143244;
  --color-bg-accent: #0062733a;
  --color-bg-secondary: #343b5833;

  --color-fg: #343b58;
  --color-fg-lc: #525a7a;
  --color-fg-hc: #1e2233;
  --color-fg-ok: #316322;
  --color-fg-special: #45208a;
  --color-fg-warning: #755000;
  --color-fg-error: #940d26;
  --color-fg-accent: #004a57;

  --font-sans: "Open Sans", sans-serif;
  --font-mono: "Recursive", monospace;

  --font-2xs: 0.625rem;
  --font-xs: 0.75rem;
  --font-s: 0.875rem;
  --font-m: 1rem;
  --font-l: 1.25rem;
  --font-xl: 1.5rem;
  --font-2xl: 2rem;
  --font-3xl: 3rem;

  --space-2xs: 2px;
  --space-xs: 4px;
  --space-s: 8px;
  --space-m: 16px;
  --space-l: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 80px;
}

.dark {
  --color-bg: #15161e;
  --color-bg-lc: #1a1b26;
  --color-bg-hc: #101017;
  --color-bg-ok: #9ece6a22;
  --color-bg-warning: #e0af6822;
  --color-bg-error: #f7768e22;
  --color-bg-accent: #2ac3de1a;
  --color-bg-secondary: #9aa5ce22;

  --color-fg: #9aa5ce;
  --color-fg-lc: #7585bd;
  --color-fg-hc: #cbd1e6;
  --color-fg-ok: #9ece6a;
  --color-fg-special: #9678cc;
  --color-fg-warning: #e0af68;
  --color-fg-error: #f7768e;
  --color-fg-accent: #2ac3de;
}

* {
  border: 0;
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

.mobile {
  display: none;
}

.desktop {
  display: initial;
}

body,
html {
  height: 100%;
}

body {
  background-color: var(--color-bg);
  color: var(--color-fg);
  font-family: var(--font-sans);
  font-size: var(--font-m);
}

header,
main,
footer > div {
  max-width: 60rem;
  margin: auto;
  padding: 0 var(--space-m);
}

a {
  color: var(--color-fg-accent);
  text-decoration: underline;
}

a:hover {
  text-decoration: underline;
}

a[href^="http"]:after {
  content: " ➦";
  font-family: "icons";
  position: relative;
  font-style: normal;
  top: 2px;
}

a.active {
  color: var(--color-fg-hc);
}

a.active:hover {
  text-decoration: none;
  cursor: default;
}

details > summary {
  cursor: pointer;
}

code {
  font-family: var(--font-mono);
  background: var(--color-bg-secondary);
  color: var(--color-fg);
  padding: 0 var(--space-xs);
  border-radius: var(--space-xs);
  font-style: normal;
}

p,
li {
  line-height: 1.6;
}

p + p {
  margin-top: var(--space-m);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 1em 0;
}

h1 {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: var(--font-l);
  letter-spacing: var(--space-2xs);
}

h1 > span {
  color: var(--color-fg-lc);
}

h1 i:before {
  display: inline-block;
  font-size: var(--font-3xl);
  vertical-align: middle;
  color: var(--color-fg-lc);
  position: relative;
  top: -2px;
}

h1 > a,
h1 > a:hover {
  text-decoration: none;
  color: inherit;
}

h2 {
  text-align: center;
  text-transform: uppercase;
  margin-top: 2em;
}

ul {
  padding-left: var(--space-l);
}

li {
  margin: var(--space-s) 0;
}

header {
  background: var(--color-bg);
}

nav {
  background: var(--color-bg-hc);
  border-radius: var(--space-s);
}

nav a {
  text-decoration: none;
}

nav ul {
  list-style: none;
  padding: var(--space-s) var(--space-m);
}

nav li {
  display: inline-block;
}

nav li + li {
  margin-left: var(--space-m);
}

header .box {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

header .extra {
  text-align: right;
  display: grid;
  place-content: center end;
}

header .extra a {
  text-decoration: none;
}

header .extra a:after {
  content: "";
}

header .extra i:before {
  font-size: var(--font-l);
  text-decoration: none;
  display: inline-block;
  vertical-align: middle;
  position: relative;
  top: -2px;
  margin-right: var(--space-s);
}

header .extra button {
  background: transparent;
  color: var(--color-fg-lc);
  cursor: pointer;
}

header .extra button:hover {
  color: var(--color-fg-accent);
}

header .extra button:before {
  content: "\f11d";
  font-family: icons;
  font-size: var(--font-xl);
  display: inline-block;
  vertical-align: middle;
  position: relative;
  top: -2px;
  margin-left: var(--space-m);
}

.dark header .extra button:before {
  content: "\f12a";
}

footer {
  text-align: center;
  background: var(--color-bg-lc);
  padding: var(--space-l);
  margin-top: var(--space-xl);
  opacity: 0;
}

h3,
h4 {
  position: relative;
  cursor: pointer;
}

h3:target,
h4:target {
  background: var(--color-bg-lc);
}

h3:target::before,
h4:target::before {
  content: "|";
  position: absolute;
  top: -2px;
  left: -0.6rem;
  color: var(--color-fg-accent);
}

h3:hover::after,
h4:hover::after {
  content: "\f101";
  font-family: icons;
  font-size: var(--font-l);
  position: absolute;
  top: 2px;
  margin-left: 0.5rem;
}

@media (max-width: 45rem) {
  .mobile {
    display: initial;
  }

  .desktop {
    display: none;
  }

  body {
    font-size: var(--font-s);
  }

  header .box {
    grid-template-columns: 1fr;
  }

  header h1 {
    margin-bottom: var(--space-s);
  }

  header .extra {
    margin-bottom: var(--space-m);
    text-align: left;
    place-content: center;
    xt-align: left;
  }

  nav {
    text-align: center;
  }

  h2 {
    margin-top: 1em;
  }
}