:root {
  --bg: #f8fbff;
  --surface: #ffffff;
  --ink: #172033;
  --muted: #5c6880;
  --brand: #2563eb;
  --brand2: #7c3aed;
  --accent: #06b6d4;
  --ring: #dbeafe;
  --line: #e6edf7;
  --success: #16a34a;
  --warn: #f59e0b;
}

* {
  box-sizing: border-box
}

html {
  scroll-behavior: smooth
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: linear-gradient(180deg, #eef6ff 0%, #f8fbff 42%, #fff 100%);
  color: var(--ink);
  line-height: 1.65
}

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

a:hover {
  text-decoration: underline
}

.container {
  max-width: 1120px;
  margin: auto;
  padding: 0 22px
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line)
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0
}

.brand {
  font-weight: 900;
  color: var(--ink);
  letter-spacing: -.03em;
  font-size: 1.15rem
}

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

.navlinks {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: .92rem
}

.hero {
  padding: 72px 0 48px
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.14fr .86fr;
  gap: 32px;
  align-items: center
}

.badge {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  background: #eef6ff;
  border: 1px solid var(--ring);
  color: #164aa6;
  padding: 7px 12px;
  border-radius: 999px;
  font-weight: 700;
  font-size: .86rem
}

h1 {
  font-size: clamp(2.15rem, 4vw, 4.55rem);
  line-height: 1.04;
  letter-spacing: -.06em;
  margin: 18px 0 18px
}

h2 {
  font-size: clamp(1.55rem, 2.6vw, 2.25rem);
  line-height: 1.15;
  letter-spacing: -.035em;
  margin: 46px 0 14px
}

h3 {
  font-size: 1.24rem;
  margin: 26px 0 10px
}

.lead {
  font-size: 1.18rem;
  color: var(--muted);
  max-width: 760px
}

.btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 26px
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 16px;
  padding: 13px 18px;
  font-weight: 800;
  border: 1px solid transparent;
  box-shadow: 0 10px 26px rgba(37, 99, 235, .16)
}

.btn.primary {
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  color: #fff
}

.btn.secondary {
  background: #fff;
  color: var(--ink);
  border-color: var(--line)
}

.hero-card,
.card {
  background: rgba(255, 255, 255, .92);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 18px 55px rgba(24, 39, 75, .08)
}

.hero-card {
  padding: 24px
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px
}

.metric {
  background: linear-gradient(180deg, #fff, #f7fbff);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 18px
}

.metric b {
  display: block;
  font-size: 1.45rem;
  color: var(--brand)
}

.section {
  padding: 22px 0 46px
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px
}

.grid.two {
  grid-template-columns: repeat(2, 1fr)
}

.card {
  padding: 24px
}

.card h3 {
  margin-top: 0
}

.pill {
  display: inline-flex;
  margin: 5px 6px 5px 0;
  padding: 7px 10px;
  border-radius: 999px;
  background: #f1f5ff;
  border: 1px solid #dfe8ff;
  color: #244779;
  font-size: .86rem;
  font-weight: 700
}

.toc {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 18px
}

.toc a {
  display: block;
  padding: 8px 0;
  border-bottom: 1px dashed #e6edf7
}

.toc a:last-child {
  border-bottom: 0
}

.callout {
  border-left: 5px solid var(--brand);
  background: #eff6ff;
  border-radius: 18px;
  padding: 18px 20px;
  margin: 22px 0
}

.download {
  background: linear-gradient(135deg, #113a8a, #5b21b6);
  color: #fff;
  border-radius: 30px;
  padding: 32px;
  margin: 34px 0
}

.download p {
  color: #dbeafe !important;
}

.download a {
  color: #fff
}

.codebox {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 18px;
  padding: 16px;
  overflow: auto;
  font-size: .92rem
}

.checklist li {
  margin: 8px 0
}

.footer {
  padding: 34px 0;
  margin-top: 30px;
  background: #0f172a;
  color: #dbeafe
}

.footer a {
  color: #93c5fd
}

.crumb {
  font-size: .92rem;
  color: var(--muted);
  margin-bottom: 12px
}

.article {
  max-width: 900px
}

.article p {
  color: #344056
}

.resource-list {
  display: grid;
  gap: 14px
}

.resource {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff
}

.tag {
  font-size: .78rem;
  font-weight: 800;
  color: #075985;
  background: #ecfeff;
  border: 1px solid #cffafe;
  border-radius: 999px;
  padding: 5px 9px
}

@media(max-width:850px) {

  .hero-grid,
  .grid,
  .grid.two {
    grid-template-columns: 1fr
  }

  .nav {
    align-items: flex-start
  }

  .navlinks {
    justify-content: flex-start
  }

  .resource {
    align-items: flex-start;
    flex-direction: column
  }

  h1 {
    font-size: 2.35rem
  }
}