:root {
  color-scheme: dark;

  --heat: oklch(0.68 0.19 42);
  --heat-soft: oklch(0.68 0.19 42 / 0.14);
  --heat-strong: oklch(0.72 0.18 42);

  --bg: oklch(0.12 0.008 42);
  --bg-elevated: oklch(0.15 0.01 42);
  --bg-code: oklch(0.13 0.009 42);

  --text: oklch(0.93 0.008 42);
  --text-secondary: oklch(0.72 0.012 42);
  --text-muted: oklch(0.55 0.014 42);

  --line: oklch(0.28 0.014 42);

  --font-sans: "Hanken Grotesk", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --duration-ui: 200ms;
  --duration-press: 140ms;
  --radius: 2px;

  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-synthesis: none;
  font-feature-settings: "ss01" 1, "cv11" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(ellipse 70% 40% at 20% 0%, oklch(0.18 0.028 42 / 0.4), transparent 60%),
    var(--bg);
}

a {
  color: inherit;
}

.site-header {
  position: absolute;
  top: 24px;
  left: 28px;
}

.site-header a {
  display: flex;
  min-height: 28px;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  line-height: 1;
  text-decoration: none;
  transition: color var(--duration-ui) var(--ease-out);
}

.site-header a:focus-visible {
  color: var(--text);
  outline: 0;
  box-shadow: 0 1px 0 var(--heat);
}

@media (hover: hover) and (pointer: fine) {
  .site-header a:hover {
    color: var(--text);
  }
}

.brand-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--heat);
  box-shadow: 0 0 0 3px var(--heat-soft);
}

main {
  width: min(680px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(128px, 18vh, 176px) 0 96px;
}

.eyebrow {
  margin: 0 0 20px;
  color: color-mix(in oklch, var(--heat) 72%, var(--text-muted));
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  max-width: 14ch;
  margin: 0;
  color: var(--text);
  font-size: clamp(2.25rem, 7vw, 4.25rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.lede {
  max-width: 52ch;
  margin: 28px 0 0;
  color: var(--text-secondary);
  font-size: clamp(1rem, 2.5vw, 1.125rem);
  line-height: 1.65;
}

.primary-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 14px;
  background: var(--bg-elevated);
  color: color-mix(in oklch, var(--heat) 75%, var(--text));
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition:
    border-color var(--duration-ui) var(--ease-out),
    color var(--duration-ui) var(--ease-out),
    background-color var(--duration-ui) var(--ease-out),
    transform var(--duration-press) var(--ease-out);
}

.primary-link:focus-visible {
  border-color: color-mix(in oklch, var(--heat) 42%, var(--line));
  background: var(--heat-soft);
  color: var(--heat-strong);
  outline: 0;
}

.primary-link:active {
  transform: scale(0.97);
}

.primary-link span {
  transition: transform var(--duration-ui) var(--ease-out);
}

.primary-link:focus-visible span {
  transform: translateX(3px);
}

@media (hover: hover) and (pointer: fine) {
  .primary-link:hover {
    border-color: color-mix(in oklch, var(--heat) 42%, var(--line));
    background: var(--heat-soft);
    color: var(--heat-strong);
  }

  .primary-link:hover span {
    transform: translateX(3px);
  }
}

.guide-sections {
  display: grid;
  gap: 64px;
  margin-top: clamp(88px, 14vw, 128px);
}

section {
  display: grid;
  grid-template-columns: minmax(120px, 0.34fr) minmax(0, 1fr);
  gap: 32px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

h2 {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.5;
  text-transform: uppercase;
}

.section-body {
  display: grid;
  gap: 20px;
}

p,
li {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.section-body p {
  margin: 0;
}

ol,
ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 20px;
}

li::marker {
  color: color-mix(in oklch, var(--heat) 55%, var(--text-muted));
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: color-mix(in oklch, var(--heat) 40%, var(--text-secondary));
}

pre {
  margin: 4px 0 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--bg-code);
  color: var(--text-secondary);
  font: 0.8125rem/1.65 var(--font-mono);
  white-space: pre-wrap;
  box-shadow: inset 0 1px 0 oklch(1 0 0 / 0.03);
}

.guide-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  border-top: 1px solid var(--line);
  margin-top: 96px;
  padding-top: 24px;
}

.guide-nav a {
  color: var(--text-muted);
  font-size: 0.75rem;
  text-decoration: none;
  transition: color var(--duration-ui) var(--ease-out);
}

.guide-nav a:focus-visible,
.guide-nav a[aria-current="page"] {
  color: color-mix(in oklch, var(--heat) 65%, var(--text));
  outline: 0;
}

@media (hover: hover) and (pointer: fine) {
  .guide-nav a:hover {
    color: color-mix(in oklch, var(--heat) 65%, var(--text));
  }
}

@media (max-width: 560px) {
  .site-header {
    top: 16px;
    left: 16px;
  }

  main {
    width: min(100% - 32px, 680px);
  }

  section {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .primary-link,
  .primary-link span,
  .guide-nav a,
  .site-header a {
    transition: none;
  }
}