:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5d677a;
  --line: #dfe4ec;
  --panel: #ffffff;
  --soft: #f5f7fb;
  --accent: #3157d5;
  --accent-dark: #2443a8;
  --success: #176b45;
  --warning-bg: #fff8e6;
  --warning-line: #f0d58a;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}
.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { color: var(--ink); text-decoration: none; font-size: 1.15rem; font-weight: 800; letter-spacing: .01em; }
.nav-links { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; font-size: .95rem; }
.nav-links a { color: var(--muted); text-decoration: none; font-weight: 650; }
.nav-links a:hover { color: var(--ink); }
.hero { padding: 88px 0 64px; background: linear-gradient(180deg, #f6f8ff 0%, #fff 100%); }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-weight: 800; text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.02em; }
h1 { margin: 0; font-size: clamp(2.3rem, 5vw, 4.5rem); max-width: 900px; }
h2 { margin: 0 0 18px; font-size: clamp(1.7rem, 3vw, 2.4rem); }
h3 { margin: 0 0 10px; font-size: 1.12rem; }
.lead { max-width: 780px; font-size: 1.18rem; color: var(--muted); margin: 22px 0 0; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 9px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 750;
}
.button:hover { color: #fff; background: var(--accent-dark); border-color: var(--accent-dark); }
.button.secondary { background: #fff; color: var(--accent); }
.button.secondary:hover { color: var(--accent-dark); border-color: var(--accent-dark); }
.section { padding: 64px 0; }
.section.soft { background: var(--soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 24px; }
.card p, .policy p, .policy li { color: var(--muted); }
.checklist { margin: 16px 0 0; padding-left: 21px; }
.checklist li { margin: 7px 0; }
.notice { margin-top: 24px; padding: 16px 18px; background: var(--warning-bg); border: 1px solid var(--warning-line); border-radius: 10px; color: #57450d; }
.price-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 28px; }
.price-card { border: 1px solid var(--line); border-radius: 16px; padding: 28px; background: #fff; }
.price-card.featured { border-width: 2px; border-color: #8297e8; }
.price { margin: 12px 0 4px; font-size: 2rem; font-weight: 850; letter-spacing: -.03em; }
.price small { font-size: .95rem; color: var(--muted); font-weight: 650; }
.price-alt { margin: 0 0 18px; color: var(--muted); font-weight: 650; }
.badge { display: inline-block; padding: 4px 9px; border-radius: 999px; background: #edf1ff; color: #2f4eb4; font-size: .78rem; font-weight: 800; }
.policy { max-width: 850px; padding: 56px 0 72px; }
.policy h1 { font-size: clamp(2rem, 4vw, 3.4rem); margin-bottom: 8px; }
.policy h2 { margin-top: 38px; font-size: 1.4rem; }
.policy h3 { margin-top: 28px; }
.meta { color: var(--muted); margin: 0 0 28px; }
.site-footer { border-top: 1px solid var(--line); padding: 34px 0 48px; color: var(--muted); font-size: .92rem; }
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 22px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-links a { color: var(--muted); }
code { background: #f1f3f7; padding: .12em .35em; border-radius: 5px; }
@media (max-width: 760px) {
  .nav { align-items: flex-start; padding: 16px 0; flex-direction: column; }
  .grid, .price-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 58px; }
}
.container.narrow { max-width: 760px; }
.checkout-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 22px; }
.button:disabled,
.button[aria-disabled="true"] { cursor: not-allowed; opacity: .55; background: #7d879b; border-color: #7d879b; color: #fff; }
.button.secondary:disabled,
.button.secondary[aria-disabled="true"] { background: #f4f5f8; border-color: #cbd1dc; color: #6b7486; }
@media (max-width: 520px) {
  .checkout-actions { grid-template-columns: 1fr; }
}