:root {
  --canvas: #f2f4f6;
  --paper: #ffffff;
  --ink: #141c24;
  --muted: #5b6673;
  --line: #d3dae2;
  --signal: #1e6a6e;
  --signal-soft: #e4f1f1;
  --nav: #10161c;
  --nav-text: #f4f6f8;
  --nav-muted: #9aa3ad;
  --focus: #1e6a6e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #101418;
    --paper: #171c22;
    --ink: #e8edf2;
    --muted: #9aa3ad;
    --line: #2a323c;
    --signal: #4aa8ab;
    --signal-soft: #1a2e30;
    --nav: #0b0e12;
    --nav-text: #f4f6f8;
    --nav-muted: #8b949e;
    --focus: #4aa8ab;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--canvas);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--signal);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration: underline;
}

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

.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  background: var(--paper);
  color: var(--ink);
  padding: 8px 12px;
  z-index: 20;
}

.skip:focus {
  top: 12px;
}

.eyebrow {
  margin: 0 0 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
}

.site-header {
  background: var(--nav);
  color: var(--nav-text);
}

.site-header a {
  color: var(--nav-text);
  text-decoration: none;
}

.site-header a:hover {
  color: #ffffff;
  text-decoration: none;
}

.header-inner,
.footer-inner,
.hero-inner,
.section-inner,
.doc-inner {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 650;
  letter-spacing: -0.03em;
  font-size: 1.05rem;
}

.mark {
  width: 32px;
  height: 32px;
  color: var(--signal);
  flex-shrink: 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 0.92rem;
}

.nav a[aria-current="page"] {
  color: #ffffff;
  box-shadow: inset 0 -2px 0 var(--signal);
  padding-bottom: 2px;
}

main {
  flex: 1;
}

.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.8fr);
  gap: 48px;
  align-items: end;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
  font-weight: 650;
}

.lede {
  margin: 0 0 20px;
  max-width: 36rem;
  font-size: 1.12rem;
  color: var(--muted);
}

.hero p {
  margin: 0;
  max-width: 38rem;
}

.hero-aside {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 22px 22px 8px;
}

.stat {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.stat:first-child {
  border-top: 0;
  padding-top: 0;
}

.stat strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 0.9rem;
}

.section {
  padding: 64px 0;
}

.section h2 {
  margin: 0 0 8px;
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  letter-spacing: -0.03em;
  font-weight: 650;
}

.section-intro {
  margin: 0 0 32px;
  max-width: 40rem;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.card {
  background: var(--paper);
  padding: 28px 24px;
  margin: 0;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.steps {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.step {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.step-index {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--signal);
  padding-top: 4px;
}

.step h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.step p {
  margin: 0;
  color: var(--muted);
}

.cta-band {
  background: var(--paper);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cta-band .section-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 36px 0;
}

.cta-band h2 {
  margin: 0 0 6px;
}

.cta-band p {
  margin: 0;
  color: var(--muted);
}

.button {
  display: inline-flex;
  align-items: center;
  background: var(--ink);
  color: var(--canvas);
  text-decoration: none;
  padding: 12px 18px;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.button:hover {
  text-decoration: none;
  opacity: 0.92;
}

@media (prefers-color-scheme: dark) {
  .button {
    background: var(--signal);
    color: #0b0e12;
  }
}

.doc {
  padding: 56px 0 80px;
}

.doc-inner {
  width: min(740px, calc(100% - 40px));
}

.doc header h1 {
  margin: 0 0 8px;
  font-size: clamp(1.8rem, 4vw, 2.3rem);
  letter-spacing: -0.035em;
}

.updated {
  margin: 0 0 36px;
  color: var(--muted);
  font-size: 0.92rem;
}

.doc section {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.doc h2 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.doc p,
.doc li {
  color: var(--ink);
}

.doc p {
  margin: 0 0 12px;
}

.doc p:last-child,
.doc ul:last-child {
  margin-bottom: 0;
}

.doc ul {
  margin: 0 0 12px;
  padding-left: 1.2rem;
}

.doc li {
  margin: 0 0 8px;
}

.site-footer {
  background: var(--nav);
  color: var(--nav-muted);
  padding: 28px 0 36px;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.88rem;
}

.site-footer a {
  color: var(--nav-text);
  text-decoration: none;
  margin-left: 16px;
}

.site-footer a:first-child {
  margin-left: 0;
}

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

@media (max-width: 800px) {
  .header-inner,
  .footer-inner,
  .hero-inner,
  .section-inner,
  .doc-inner {
    width: calc(100% - 32px);
  }

  .hero,
  .section,
  .doc {
    padding-left: 0;
    padding-right: 0;
  }

  .hero {
    padding-top: 48px;
    padding-bottom: 40px;
  }

  .hero-inner,
  .grid,
  .step {
    grid-template-columns: 1fr;
  }

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

  .section {
    padding: 48px 0;
  }
}

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