:root {
  --bg: #f7f8fb;
  --bg-elevated: #ffffff;
  --text: #1a1d24;
  --text-muted: #565d6b;
  --border: #e2e5ec;
  --accent: #2f6feb;
  --accent-soft: #e8f0fe;
  --code-bg: #eef1f6;
  --nav-bg: #ffffff;
  --shadow: 0 1px 2px rgba(20, 23, 30, 0.06), 0 4px 16px rgba(20, 23, 30, 0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116;
    --bg-elevated: #151922;
    --text: #e6e9ef;
    --text-muted: #9aa3b2;
    --border: #262b36;
    --accent: #6fa4ff;
    --accent-soft: #1a2740;
    --code-bg: #1b202b;
    --nav-bg: #11141b;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 20px rgba(0, 0, 0, 0.25);
  }
}

* {
  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: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

header.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.9rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--text);
}

.brand span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--accent);
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  font-size: 2.1rem;
  margin: 0 0 0.75rem;
}

.hero p.lede {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 42rem;
  margin: 0;
}

section {
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
}

section:last-of-type {
  border-bottom: none;
}

section h2 {
  font-size: 1.6rem;
  margin: 0 0 1.25rem;
}

section h3 {
  font-size: 1.15rem;
  margin: 2rem 0 0.6rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow);
}

.card h4 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.92rem;
}

th, td {
  text-align: left;
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--text-muted);
  font-weight: 600;
}

code {
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
}

pre code {
  background: none;
  padding: 0;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}

.steps > li {
  counter-increment: step;
  position: relative;
  padding: 0 0 1.75rem 2.75rem;
  margin: 0;
}

.steps > li:last-child {
  padding-bottom: 0;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.steps > li h3 {
  margin-top: 0;
}

.callout {
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  font-size: 0.92rem;
  margin: 1rem 0;
}

footer {
  padding: 2.5rem 0 3.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}