:root {
  --bg: #eef0ec;
  --panel: #e3e7e1;
  --line: #d6dbd3;
  --ink: #1f2a24;
  --text: #3e4a43;
  --muted: #5f6a63;
  --accent: #1f7a55;
  --accent-hover: #155c3f;
  --amber: #9a5b12;
  --button-line: #c9d0c7;
  --on-accent: #ffffff;
  --serif: "Instrument Serif", Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #151916;
    --panel: #1e231f;
    --line: #2c332d;
    --ink: #e6ebe5;
    --text: #c3cbc4;
    --muted: #8f9a91;
    --accent: #4fb487;
    --accent-hover: #6fcaa0;
    --amber: #d49a4a;
    --button-line: #3a433c;
    --on-accent: #0f1411;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #151916;
  --panel: #1e231f;
  --line: #2c332d;
  --ink: #e6ebe5;
  --text: #c3cbc4;
  --muted: #8f9a91;
  --accent: #4fb487;
  --accent-hover: #6fcaa0;
  --amber: #d49a4a;
  --button-line: #3a433c;
  --on-accent: #0f1411;
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.65;
  font-variant-ligatures: none;
  -webkit-text-size-adjust: 100%;
}

a {
  color: var(--accent);
  text-decoration: none;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

b,
strong {
  color: var(--ink);
  font-weight: 600;
}

code {
  font-family: inherit;
  color: var(--ink);
}

.page {
  width: 100%;
  max-width: 752px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Header */

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-top: 28px;
  font-size: 14px;
}

.wordmark {
  color: var(--ink);
  font-weight: 600;
}

.wordmark:hover {
  color: var(--ink);
}

.site-header nav {
  display: flex;
  gap: 24px;
  align-items: center;
}

.site-header nav a:not(.btn) {
  color: var(--muted);
}

.site-header nav a:not(.btn):hover {
  color: var(--ink);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: 4px;
  font-weight: 600;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--on-accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--on-accent);
}

.btn-secondary {
  color: var(--ink);
  border: 1px solid var(--button-line);
}

.btn-secondary:hover {
  color: var(--ink);
  border-color: var(--muted);
}

.site-header .btn {
  min-height: 40px;
  padding: 8px 16px;
}

/* Hero */

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 120px 0 72px;
}

.kicker {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 20px 0 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 128px;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.lede {
  margin: 28px 0 0;
  max-width: 620px;
  font-size: 18px;
  color: var(--ink);
}

.tagline {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 36px;
}

.hero .actions {
  justify-content: center;
}

.hero .install {
  margin-top: 48px;
  width: 460px;
  max-width: 100%;
  text-align: left;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.cursor {
  display: inline-block;
  width: 0.55em;
  height: 1.05em;
  margin-left: 2px;
  vertical-align: -0.15em;
  background: var(--accent);
  animation: blink 1.1s steps(1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .cursor {
    animation: none;
  }
}

/* Sections */

section.chapter {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

section.chapter:first-of-type {
  margin-top: 24px;
}

h2 {
  margin: 0 0 16px;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 36px;
  line-height: 1.1;
  color: var(--ink);
}

h2 .num {
  margin-right: 14px;
  font-family: var(--mono);
  font-size: 15px;
  color: var(--muted);
  vertical-align: 6px;
}

p {
  margin: 0 0 14px;
}

.lead-in {
  margin: 20px 0 8px;
}

/* Code panels */

.panel {
  position: relative;
  margin: 0;
  padding: 16px 20px;
  background: var(--panel);
  border-radius: 4px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  overflow-x: auto;
}

.panel + .panel,
.panel + .lead-in {
  margin-top: 16px;
}

pre.panel {
  white-space: pre;
  font-family: var(--mono);
}

.panel .line {
  white-space: pre;
}

.panel.small {
  font-size: 13.5px;
}

.panel.has-copy {
  padding-right: 76px;
}

.p {
  color: var(--muted);
  user-select: none;
}

.k {
  color: var(--ink);
  font-weight: 600;
}

.s {
  color: var(--accent);
}

.x {
  color: var(--amber);
}

.c {
  color: var(--muted);
}

.copy {
  position: absolute;
  top: 12px;
  right: 12px;
  min-height: 28px;
  padding: 4px 10px;
  font-family: inherit;
  font-size: 12px;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 3px;
  cursor: pointer;
}

.copy:hover {
  color: var(--ink);
  border-color: var(--button-line);
}

.install-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.install-grid .panel + .panel {
  margin-top: 0;
}

/* Stop reasons */

.reasons {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
}

.reasons li::before {
  content: "●";
  margin-right: 8px;
  color: var(--accent);
}

.reasons li.stop::before {
  color: var(--muted);
}

.reasons li.human::before {
  color: var(--amber);
}

.legend {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

/* Workflow graph */

.figure {
  margin: 24px 0 0;
  padding: 24px 20px 16px;
  background: var(--panel);
  border-radius: 4px;
}

.figure svg {
  display: block;
  width: 100%;
  max-width: 540px;
  height: auto;
  margin: 0 auto;
}

.figure svg text {
  font-variant-ligatures: none;
}

.figure svg .node path,
.figure svg .node polygon {
  fill: var(--bg);
}

.figure svg .node.terminal path,
.figure svg .node.terminal polygon {
  fill: var(--accent);
}

.figure figcaption {
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}

.highlight {
  color: var(--amber);
  font-weight: 600;
}

/* Footer */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 20px;
  margin-top: 72px;
  padding: 24px 0 48px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}

.site-footer nav {
  display: flex;
  gap: 20px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* Phone */

@media (max-width: 640px) {
  body {
    font-size: 14px;
  }

  .site-header {
    padding-top: 20px;
  }

  .site-header nav {
    gap: 16px;
  }

  .site-header nav .wide {
    display: none;
  }

  .hero {
    padding: 64px 0 48px;
  }

  .hero h1 {
    font-size: 80px;
  }

  .lede {
    font-size: 16px;
  }

  .hero .actions {
    width: 100%;
    flex-direction: column;
  }

  h2 {
    font-size: 30px;
  }

  h2 .num {
    font-size: 13px;
    vertical-align: 4px;
    margin-right: 10px;
  }

  .panel {
    padding: 14px 16px;
    font-size: 12.5px;
  }

  .panel.has-copy {
    padding-right: 16px;
    padding-top: 44px;
  }

  .install-grid,
  .reasons {
    grid-template-columns: minmax(0, 1fr);
  }

  .reasons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .figure {
    padding: 16px 8px 12px;
  }
}