:root {
  color-scheme: light;

  --color-canvas: #f4f7fb;
  --color-surface: #ffffff;
  --color-surface-soft: #e7eff7;
  --color-atmosphere: #e8f1fa;
  --color-ink: #071b31;
  --color-muted: #3b4f65;
  --color-border: #8ca2b8;
  --color-border-strong: #48627b;
  --color-link: #0a4d80;
  --color-link-hover: #062f55;
  --color-link-underline: #5b84a8;
  --color-accent: #0b5f9f;
  --color-accent-soft: #d5e9fb;
  --color-focus: #924800;
  --color-motif-line: rgb(11 95 159 / 28%);
  --color-motif-node: rgb(11 95 159 / 72%);
  --color-shadow: rgb(7 27 49 / 10%);

  --font-sans:
    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --font-mono:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    monospace;

  --shell-width: 86rem;
  --reading-width: 70ch;
  --gutter: clamp(1rem, 4vw, 4rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --space-9: 7rem;

  --type-small: 0.875rem;
  --type-body: clamp(1rem, 0.97rem + 0.15vw, 1.125rem);
  --type-deck: clamp(1.2rem, 1.08rem + 0.55vw, 1.55rem);
  --type-h3: clamp(1.15rem, 1.08rem + 0.3vw, 1.35rem);
  --type-h2: clamp(1.5rem, 1.32rem + 0.75vw, 2.05rem);
  --type-display: clamp(2.55rem, 2rem + 2.7vw, 4.75rem);

  --line-body: 1.7;
  --line-heading: 1.08;
  --radius-small: 0.25rem;
  --radius-medium: 0.5rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;

    --color-canvas: #07131f;
    --color-surface: #0d2033;
    --color-surface-soft: #142b43;
    --color-atmosphere: #0b2135;
    --color-ink: #f5f8fb;
    --color-muted: #c2d0dd;
    --color-border: #536d84;
    --color-border-strong: #8ba2b8;
    --color-link: #9dd4ff;
    --color-link-hover: #c9e9ff;
    --color-link-underline: #70a6cf;
    --color-accent: #70bdf5;
    --color-accent-soft: #123b5d;
    --color-focus: #ffbd4a;
    --color-motif-line: rgb(112 189 245 / 26%);
    --color-motif-node: rgb(112 189 245 / 76%);
    --color-shadow: rgb(0 0 0 / 28%);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--color-canvas);
  scroll-behavior: auto;
}

body {
  min-block-size: 100vh;
  margin: 0;
  background:
    linear-gradient(
      180deg,
      var(--color-atmosphere) 0,
      transparent 30rem
    ),
    var(--color-canvas);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--type-body);
  line-height: var(--line-body);
  overflow-wrap: break-word;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--color-accent-soft);
  color: var(--color-ink);
}

a {
  color: var(--color-link);
  text-decoration-color: var(--color-link-underline);
  text-decoration-thickness: 0.09em;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--color-link-hover);
  text-decoration-thickness: 0.14em;
}

:focus-visible {
  border-radius: var(--radius-small);
  outline: 0.2rem solid var(--color-focus);
  outline-offset: 0.22rem;
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-3);
  inset-inline-start: var(--space-3);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--color-focus);
  border-radius: var(--radius-small);
  background: var(--color-ink);
  color: var(--color-canvas);
  font-weight: 800;
  text-decoration: none;
  transform: translateY(calc(-100% - var(--space-5)));
}

.skip-link:focus {
  transform: translateY(0);
}

.site-shell {
  display: grid;
  min-block-size: 100vh;
  grid-template-rows: auto 1fr auto;
}

.site-header {
  position: relative;
  border-block-start: 0.25rem solid var(--color-accent);
  border-block-end: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-header::after {
  position: absolute;
  inset-inline: 0;
  inset-block-end: -0.24rem;
  block-size: 0.48rem;
  background:
    radial-gradient(
      circle at 18% 50%,
      var(--color-surface) 0 0.11rem,
      var(--color-accent) 0.12rem 0.21rem,
      transparent 0.22rem
    ),
    radial-gradient(
      circle at 57% 50%,
      var(--color-surface) 0 0.11rem,
      var(--color-accent) 0.12rem 0.21rem,
      transparent 0.22rem
    ),
    radial-gradient(
      circle at 86% 50%,
      var(--color-surface) 0 0.11rem,
      var(--color-accent) 0.12rem 0.21rem,
      transparent 0.22rem
    );
  content: "";
  pointer-events: none;
}

.site-header__inner,
.site-main,
.site-footer__inner {
  width: 100%;
  max-width: var(--shell-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-header__inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding-block: var(--space-4);
}

.site-identity {
  display: inline-flex;
  min-block-size: 2.75rem;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-ink);
  font-size: clamp(1.3rem, 1.2rem + 0.4vw, 1.6rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.site-identity::before {
  inline-size: 0.8rem;
  block-size: 0.8rem;
  flex: 0 0 auto;
  border: 0.18rem solid var(--color-accent);
  border-radius: 50%;
  content: "";
}

.site-identity:hover {
  color: var(--color-link-hover);
  text-decoration: none;
}

.site-nav {
  display: flex;
  width: 100%;
  flex-wrap: wrap;
  gap: 0 var(--space-5);
  padding-block-start: var(--space-2);
  border-block-start: 1px solid var(--color-border);
}

.site-nav a {
  position: relative;
  display: inline-flex;
  min-block-size: 2.75rem;
  align-items: center;
  color: var(--color-ink);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--color-link);
}

.site-nav a[aria-current="page"] {
  color: var(--color-link);
  font-weight: 800;
}

.site-nav a[aria-current="page"]::after {
  position: absolute;
  inset-inline: 0;
  inset-block-end: 0.2rem;
  block-size: 0.14rem;
  background: currentColor;
  content: "";
}

.site-main {
  position: relative;
  min-inline-size: 0;
  padding-block: clamp(var(--space-7), 7vw, var(--space-9));
  overflow: clip;
}

.site-main:focus-visible {
  outline-offset: -0.2rem;
}

.prose {
  position: relative;
  z-index: 1;
  max-width: var(--reading-width);
}

.prose > :first-child {
  margin-block-start: 0;
}

.prose > :last-child {
  margin-block-end: 0;
}

h1,
h2,
h3 {
  color: var(--color-ink);
  font-weight: 800;
  line-height: var(--line-heading);
  text-wrap: balance;
}

h1 {
  max-inline-size: 22ch;
  margin-block: 0 var(--space-5);
  font-size: var(--type-display);
  letter-spacing: -0.045em;
}

h1::after {
  display: block;
  inline-size: clamp(4.75rem, 12vw, 7rem);
  block-size: 0.7rem;
  margin-block-start: var(--space-5);
  background:
    radial-gradient(
      circle at 0.35rem 0.35rem,
      var(--color-canvas) 0 0.14rem,
      var(--color-accent) 0.15rem 0.28rem,
      transparent 0.29rem
    ),
    radial-gradient(
      circle at calc(100% - 0.35rem) 0.35rem,
      var(--color-canvas) 0 0.14rem,
      var(--color-accent) 0.15rem 0.28rem,
      transparent 0.29rem
    ),
    linear-gradient(var(--color-accent), var(--color-accent)) center /
      calc(100% - 0.7rem) 0.12rem no-repeat;
  content: "";
}

h2 {
  position: relative;
  margin-block: var(--space-8) var(--space-5);
  padding-inline-start: var(--space-5);
  font-size: var(--type-h2);
  letter-spacing: -0.025em;
}

h2::before {
  position: absolute;
  inset-block-start: 0.42em;
  inset-inline-start: 0;
  inline-size: 0.65rem;
  block-size: 0.65rem;
  border: 0.15rem solid var(--color-accent);
  border-radius: 50%;
  background: var(--color-canvas);
  content: "";
}

h3 {
  margin-block: var(--space-7) var(--space-4);
  padding-inline-start: var(--space-4);
  border-inline-start: 0.18rem solid var(--color-accent);
  font-size: var(--type-h3);
  letter-spacing: -0.012em;
}

.prose > h1 + p {
  max-width: 58ch;
  margin-block-end: var(--space-7);
  color: var(--color-ink);
  font-size: var(--type-deck);
  line-height: 1.5;
  text-wrap: pretty;
}

.prose > p > strong:only-child {
  display: block;
  padding-inline-start: var(--space-5);
  border-inline-start: 0.2rem solid var(--color-accent);
  font-size: 1.08em;
  line-height: 1.5;
}

p,
ul,
ol,
blockquote,
pre,
table {
  margin-block: 0 var(--space-5);
}

p {
  text-wrap: pretty;
}

ul,
ol {
  padding-inline-start: 1.45em;
}

li {
  padding-inline-start: var(--space-2);
}

li + li {
  margin-block-start: var(--space-2);
}

li::marker {
  color: var(--color-accent);
  font-weight: 800;
}

strong {
  font-weight: 800;
}

blockquote {
  margin-inline: 0;
  padding: var(--space-4) var(--space-5);
  border-inline-start: 0.2rem solid var(--color-accent);
  background: var(--color-surface-soft);
  color: var(--color-muted);
}

hr {
  height: 0.7rem;
  margin-block: var(--space-8);
  border: 0;
  background:
    radial-gradient(
      circle at 0.35rem 0.35rem,
      var(--color-canvas) 0 0.14rem,
      var(--color-accent) 0.15rem 0.28rem,
      transparent 0.29rem
    ),
    linear-gradient(var(--color-border), var(--color-border)) left 0.35rem
      center / min(12rem, 55%) 1px no-repeat;
}

code,
kbd,
samp,
pre {
  font-family: var(--font-mono);
  font-variant-ligatures: none;
}

:not(pre) > code,
kbd,
samp {
  padding: 0.12em 0.34em;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-surface-soft);
  color: var(--color-ink);
  font-size: 0.88em;
  overflow-wrap: anywhere;
}

pre {
  max-width: 100%;
  padding: var(--space-5);
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-block-start: 0.25rem solid var(--color-accent);
  border-radius: var(--radius-medium);
  background: var(--color-surface);
  box-shadow: 0 0.75rem 2rem var(--color-shadow);
  color: var(--color-ink);
  font-size: 0.9em;
  line-height: 1.6;
  tab-size: 2;
}

pre code {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font-size: inherit;
  overflow-wrap: normal;
}

.prose > div.highlighter-rouge {
  max-width: 100%;
  margin-block: 0 var(--space-5);
}

.prose > div.highlighter-rouge pre {
  margin: 0;
}

table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

th,
td {
  padding: var(--space-3) var(--space-4);
  border-block-end: 1px solid var(--color-border);
  text-align: start;
}

th {
  color: var(--color-ink);
  font-weight: 800;
}

img,
svg,
video {
  display: block;
  max-inline-size: 100%;
  block-size: auto;
}

.site-footer {
  color: var(--color-muted);
  font-size: var(--type-small);
  background: var(--color-surface);
}

.site-footer::before {
  display: block;
  block-size: 0.7rem;
  border-block-start: 1px solid var(--color-border);
  background:
    radial-gradient(
      circle at 12% 50%,
      var(--color-surface) 0 0.13rem,
      var(--color-accent) 0.14rem 0.27rem,
      transparent 0.28rem
    ),
    radial-gradient(
      circle at 48% 50%,
      var(--color-surface) 0 0.13rem,
      var(--color-accent) 0.14rem 0.27rem,
      transparent 0.28rem
    ),
    radial-gradient(
      circle at 88% 50%,
      var(--color-surface) 0 0.13rem,
      var(--color-accent) 0.14rem 0.27rem,
      transparent 0.28rem
    ),
    linear-gradient(var(--color-border), var(--color-border)) center / 100% 1px
      no-repeat;
  content: "";
}

.site-footer__inner {
  display: flex;
  min-block-size: 6rem;
  align-items: center;
  padding-block: var(--space-5);
}

.site-footer__inner span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-ink);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.site-footer__inner span::before {
  inline-size: 0.65rem;
  block-size: 0.65rem;
  border: 0.15rem solid var(--color-accent);
  border-radius: 50%;
  content: "";
}

@media (min-width: 52rem) {
  .site-header__inner {
    min-block-size: 5.5rem;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-7);
    padding-block: var(--space-3);
  }

  .site-nav {
    width: auto;
    gap: 0 var(--space-5);
    padding-block-start: 0;
    border-block-start: 0;
  }
}

@media (min-width: 75rem) {
  .site-main::before {
    position: absolute;
    inset-block-start: var(--space-8);
    inset-inline-end: var(--gutter);
    z-index: 0;
    inline-size: clamp(16rem, 24vw, 22rem);
    block-size: 14rem;
    background:
      radial-gradient(
        circle at 8% 72%,
        transparent 0 0.26rem,
        var(--color-motif-node) 0.28rem 0.41rem,
        transparent 0.43rem
      ),
      radial-gradient(
        circle at 40% 72%,
        transparent 0 0.26rem,
        var(--color-motif-node) 0.28rem 0.41rem,
        transparent 0.43rem
      ),
      radial-gradient(
        circle at 40% 30%,
        transparent 0 0.26rem,
        var(--color-motif-node) 0.28rem 0.41rem,
        transparent 0.43rem
      ),
      radial-gradient(
        circle at 72% 30%,
        transparent 0 0.26rem,
        var(--color-motif-node) 0.28rem 0.41rem,
        transparent 0.43rem
      ),
      radial-gradient(
        circle at 72% 58%,
        transparent 0 0.26rem,
        var(--color-motif-node) 0.28rem 0.41rem,
        transparent 0.43rem
      ),
      radial-gradient(
        circle at 94% 58%,
        transparent 0 0.26rem,
        var(--color-motif-node) 0.28rem 0.41rem,
        transparent 0.43rem
      ),
      linear-gradient(
          var(--color-motif-line),
          var(--color-motif-line)
        )
        left 8% top 72% / 32% 1px no-repeat,
      linear-gradient(
          var(--color-motif-line),
          var(--color-motif-line)
        )
        left 40% top 30% / 1px 42% no-repeat,
      linear-gradient(
          var(--color-motif-line),
          var(--color-motif-line)
        )
        left 40% top 30% / 32% 1px no-repeat,
      linear-gradient(
          var(--color-motif-line),
          var(--color-motif-line)
        )
        left 72% top 30% / 1px 28% no-repeat,
      linear-gradient(
          var(--color-motif-line),
          var(--color-motif-line)
        )
        left 72% top 58% / 22% 1px no-repeat;
    content: "";
    opacity: 0.72;
    pointer-events: none;
  }
}

@media (max-width: 28rem) {
  .site-nav {
    gap: 0 var(--space-4);
  }

  .site-nav a {
    font-size: 0.9rem;
  }

  pre {
    padding: var(--space-4);
  }
}

/* Homepage brand composition */

.page--home .prose::before {
  display: block;
  width: min(100%, 32rem);
  aspect-ratio: 1313 / 494;
  margin-block-end: var(--space-7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background-color: #f4f7fb;
  background-image: url("/assets/images/joshternet-logo.png");
  background-position: center;
  background-repeat: no-repeat;
  background-size: calc(100% - 2.5rem) auto;
  box-shadow: 0 1rem 3rem var(--color-shadow);
  content: "";
}

@media (min-width: 75rem) {
  .page--home .prose {
    display: grid;
    max-width: none;
    grid-template-columns:
      minmax(0, var(--reading-width))
      minmax(17rem, 1fr);
    column-gap: clamp(var(--space-7), 7vw, var(--space-9));
  }

  .page--home .prose > * {
    grid-column: 1;
  }

  .page--home .prose::before {
    width: 100%;
    max-width: none;
    margin: 0;
    grid-column: 2;
    grid-row: 1 / span 5;
    align-self: start;
  }

  .page--home .site-main::before {
    inset-block-start: 24rem;
    opacity: 0.5;
  }
}

/* Standards index */

.page--specs .prose > h3 {
  position: relative;
  margin-block-start: var(--space-8);
  padding: var(--space-6) 0 0 var(--space-6);
  border-block-start: 2px solid var(--color-border-strong);
  border-inline-start: 0;
  font-size: clamp(1.3rem, 1.18rem + 0.5vw, 1.65rem);
}

.page--specs .prose > h3::before {
  position: absolute;
  inset-block-start: -0.48rem;
  inset-inline-start: 0;
  inline-size: 0.8rem;
  block-size: 0.8rem;
  border: 0.18rem solid var(--color-accent);
  border-radius: 50%;
  background: var(--color-canvas);
  box-shadow: 0 0 0 0.35rem var(--color-canvas);
  content: "";
}

.page--specs .prose > h3::after {
  position: absolute;
  inset-block-start: -0.08rem;
  inset-inline-start: 0.75rem;
  inline-size: clamp(3rem, 12vw, 7rem);
  block-size: 0.14rem;
  background: var(--color-accent);
  content: "";
}

.page--specs .prose > h3 code {
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 0.86em;
}

.page--specs .prose > h3 + p {
  width: fit-content;
  margin-block: 0 var(--space-5);
  padding: var(--space-3) var(--space-4);
  border-inline-start: 0.25rem solid var(--color-accent);
  background: var(--color-surface-soft);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: var(--type-small);
  line-height: 1.65;
}

.page--specs .prose > h3 + p strong {
  color: var(--color-ink);
  font-family: var(--font-sans);
}

.page--specs .prose > ol {
  padding-inline-start: var(--space-7);
  counter-reset: reading-order;
  list-style: none;
}

.page--specs .prose > ol > li {
  position: relative;
  padding-inline-start: var(--space-3);
  counter-increment: reading-order;
}

.page--specs .prose > ol > li::before {
  position: absolute;
  inset-inline-end: 100%;
  color: var(--color-accent);
  content: counter(reading-order, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--type-small);
  font-weight: 800;
}

@media (max-width: 32rem) {
  .page--specs .prose > h3 {
    padding-block-start: var(--space-5);
    padding-inline-start: var(--space-4);
  }

  .page--specs .prose > h3 + p {
    width: 100%;
  }
}