:root {
  color-scheme: light;
  --bg: #ffffff;
  --panel: #f6f5f2;
  --ink: #16181a;
  --muted: #6b6f73;
  --faint: #9a9ea2;
  --rule: #e4e3de;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  --gutter: 24px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-pill: 999px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  border-radius: 2px;
}

img {
  max-width: 100%;
  display: block;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 12px;
  background: var(--ink);
  color: var(--bg);
  border-radius: var(--radius-sm);
  transform: translateY(-160%);
  transition: transform 0.15s ease;
}

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

.copy-toast {
  position: fixed;
  top: max(14px, env(safe-area-inset-top));
  left: 50%;
  z-index: 120;
  max-width: calc(100vw - 32px);
  padding: 10px 16px;
  background: var(--ink);
  color: var(--bg);
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 24px rgba(22, 24, 26, 0.18);
  font-size: 14px;
  line-height: 1.4;
  text-align: center;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -10px);
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.copy-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 40;
  background: transparent;
}

.header-inner {
  width: 100%;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14px;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.12s ease;
}

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

.site-nav .github-link {
  color: var(--ink);
  font-weight: 500;
}

@media (max-width: 640px) {
  .site-nav a:not(.github-link) {
    display: none;
  }
}

/* ---------- Section scaffold ---------- */

main > section {
  padding-block: 80px;
}

#install {
  padding-bottom: 160px;
}

.section-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  line-height: 1.15;
  font-weight: 640;
  letter-spacing: -0.02em;
}

.section-heading p {
  color: var(--muted);
  max-width: 46ch;
}

/* ---------- Hero ---------- */

.hero {
  max-width: 1080px;
  margin: 0 auto;
  padding-inline: var(--gutter);
  text-align: center;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  line-height: 1.02;
  font-weight: 500;
  letter-spacing: -0.035em;
}

.hero-lead {
  margin: 22px auto 0;
  max-width: 600px;
  font-size: 16px;
  color: var(--muted);
}

.hero-actions {
  margin: 34px 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.primary-action {
  display: inline-flex;
  align-items: center;
  padding: 11px 22px;
  border: 0;
  background: var(--ink);
  color: var(--bg);
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.12s ease;
}

.primary-action:hover {
  opacity: 0.85;
}

.text-action {
  font-size: 15px;
  color: var(--muted);
  text-decoration: none;
}

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

.hero-shot {
  margin: clamp(48px, 7vw, 84px) auto 0;
  width: 100%;
  max-width: none;
}

.hero-shot img {
  width: 100%;
  height: auto;
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 70%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 0%, #000 70%, transparent 100%);
}

/* ---------- Route section ---------- */

.route-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 48px;
  align-items: start;
}

.route-copy p {
  margin-top: 0;
  color: var(--muted);
}

.route-ladder {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: route;
  border-top: 1px solid var(--rule);
}

.route-ladder li {
  counter-increment: route;
  padding: 14px 0 14px 44px;
  position: relative;
  border-bottom: 1px solid var(--rule);
  font-weight: 500;
}

.route-ladder li::before {
  content: counter(route, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 15px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--faint);
}

/* ---------- Workflow ---------- */

.workflow-heading {
  max-width: 640px;
}

.workflow-list {
  margin: 44px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
}

.workflow-list li {
  display: grid;
  grid-template-columns: 120px 1fr 240px;
  gap: 28px;
  align-items: baseline;
  padding: 26px 0;
  border-bottom: 1px solid var(--rule);
}

.step-index {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.step-index span {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 500;
}

.step-index small {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--faint);
}

.workflow-list h3 {
  margin: 0 0 5px;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.workflow-list li > div:nth-child(2) p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.step-output {
  margin: 0;
  font-size: 0.85rem;
  color: var(--faint);
  text-align: right;
}

/* ---------- Coverage ---------- */

.coverage-heading {
  max-width: 640px;
}

.coverage-grid {
  margin: 44px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.coverage-grid article {
  padding: 30px;
  border-right: 1px solid var(--rule);
}

.coverage-grid article:last-child {
  border-right: none;
}

.metric {
  margin: 0 0 12px;
  font-size: 2.6rem;
  line-height: 1;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.coverage-grid h3 {
  margin: 0 0 6px;
  font-size: 0.95rem;
  font-weight: 600;
}

.coverage-grid article p:last-child {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.coverage-note {
  margin: 28px 0 0;
  font-size: 0.9rem;
  color: var(--faint);
  max-width: 60ch;
}

/* ---------- Install ---------- */

.install-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.install-heading p {
  margin-bottom: 0;
}

.inline {
  font-family: var(--mono);
  font-size: 0.88em;
  padding: 1px 5px;
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  color: var(--ink);
}

.install-tool {
  width: 100%;
  max-width: 360px;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  padding: 6px 6px 6px 16px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  background: var(--panel);
}

.install-tool code {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  word-break: break-all;
}

.copy-button {
  padding: 9px 16px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  font: inherit;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity 0.12s ease;
}

.copy-button:hover {
  opacity: 0.85;
}

/* ---------- Footer ---------- */

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--muted);
}

.footer-inner p {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.footer-inner a {
  color: var(--ink);
  text-decoration: none;
}

.footer-inner a:hover {
  text-decoration: underline;
}

/* ---------- Responsive ---------- */

@media (max-width: 820px) {
  .route-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .workflow-list li {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .step-output {
    text-align: left;
  }

  .coverage-grid {
    grid-template-columns: 1fr;
  }

  .coverage-grid article {
    border-right: none;
    border-bottom: 1px solid var(--rule);
  }

  .coverage-grid article:last-child {
    border-bottom: none;
  }
}

@media (max-width: 560px) {
  .copy-toast {
    white-space: normal;
  }

  .install-tool {
    grid-template-columns: 1fr;
    padding: 14px;
  }

  .copy-button {
    width: 100%;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition: none !important;
  }
}