:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --accent: #4f46e5;
  --accent-soft: #eef2ff;
  --accent-strong: #312e81;
  --warm: #ea580c;
  --warm-soft: #fff7ed;
  --code-bg: #1e1b4b;
  --code-text: #e0e7ff;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1020;
    --surface: #131a2e;
    --surface-alt: #182042;
    --text: #e8ecf8;
    --muted: #a2aecb;
    --border: #26304f;
    --accent: #8b8bfa;
    --accent-soft: #1c2450;
    --accent-strong: #c7d2fe;
    --warm: #fb923c;
    --warm-soft: #2a1c15;
    --code-bg: #0a0f1f;
    --code-text: #dbe4ff;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 30px rgba(0, 0, 0, 0.35);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
}

code,
pre {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;
}

.wrap {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

/* ---------- nav ---------- */

header.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
}

.nav-inner img {
  width: 30px;
  height: 30px;
}

.nav-inner strong {
  font-size: 17px;
  letter-spacing: -0.01em;
}

.nav-links {
  margin-left: auto;
  display: flex;
  gap: 20px;
  font-size: 14.5px;
}

.nav-links a {
  color: var(--muted);
}

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

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #312e81 0%, #1e1b4b 60%, #0f172a 100%);
  color: #f8fafc;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      circle at 12% 20%,
      rgba(251, 146, 60, 0.18),
      transparent 45%
    ),
    radial-gradient(circle at 85% 15%, rgba(99, 102, 241, 0.35), transparent 50%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  align-items: center;
  padding: 72px 0 64px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(38px, 6vw, 58px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero p.lead {
  margin: 0 0 26px;
  font-size: clamp(17px, 2.1vw, 20px);
  color: #c7d2fe;
  max-width: 46ch;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.badges img {
  height: 20px;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform 0.12s ease, background 0.12s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: #fb923c;
  color: #2a1206;
}

.btn-primary:hover {
  background: #fdba74;
}

.btn-ghost {
  border-color: rgba(226, 232, 240, 0.4);
  color: #e2e8f0;
}

.btn-ghost:hover {
  background: rgba(226, 232, 240, 0.12);
}

.hero-art {
  display: flex;
  justify-content: center;
}

.hero-art img {
  width: min(260px, 60vw);
  filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.45));
}

/* ---------- sections ---------- */

section {
  padding: 64px 0;
}

section + section {
  border-top: 1px solid var(--border);
}

h2 {
  margin: 0 0 8px;
  font-size: clamp(24px, 3.4vw, 32px);
  letter-spacing: -0.02em;
}

.sub {
  margin: 0 0 34px;
  color: var(--muted);
  max-width: 70ch;
}

.sub.after {
  margin: 20px 0 0;
}

.grid {
  display: grid;
  gap: 18px;
}

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

.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 6px;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 14.8px;
}

.card .tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.card.warm .tag {
  background: var(--warm-soft);
  color: var(--warm);
}

.card ul {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 14.8px;
}

.card li + li {
  margin-top: 4px;
}

/* ---------- features ---------- */

.feature {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.feature .ico {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
}

.feature .ico svg {
  width: 20px;
  height: 20px;
}

/* ---------- code ---------- */

pre {
  margin: 0;
  padding: 18px 20px;
  border-radius: var(--radius);
  background: var(--code-bg);
  color: var(--code-text);
  overflow-x: auto;
  font-size: 13.6px;
  line-height: 1.7;
}

pre .c {
  color: #a5b4fc;
}

pre .w {
  color: #fdba74;
}

/* ---------- docs links ---------- */

.doclist {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.doclist a {
  display: block;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  font-weight: 600;
  font-size: 15px;
}

.doclist a span {
  display: block;
  font-weight: 400;
  color: var(--muted);
  font-size: 13.5px;
  margin-top: 2px;
}

.doclist a:hover {
  border-color: var(--accent);
  text-decoration: none;
}

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--border);
  padding: 30px 0 44px;
  color: var(--muted);
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    text-align: center;
    padding: 52px 0 48px;
  }

  .hero p.lead {
    margin-inline: auto;
  }

  .badges,
  .cta {
    justify-content: center;
  }

  .cols-2,
  .cols-3 {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: 14px;
    font-size: 13.5px;
  }
}