:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --surface-2: #eef4ff;
  --text: #172033;
  --muted: #5d687c;
  --border: #dce3ef;
  --brand: #1769e0;
  --brand-dark: #0f4fae;
  --success: #137a44;
  --shadow: 0 16px 42px rgba(20, 40, 80, .09);
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
a { color: var(--brand); }
a:hover { color: var(--brand-dark); }
.container { width: min(1080px, calc(100% - 36px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 22px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--text); font-weight: 760; letter-spacing: -.01em; }
.brand img { width: 38px; height: 38px; border-radius: 9px; }
.nav-links { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; }
.nav-links a { text-decoration: none; color: #39445a; font-size: .94rem; font-weight: 620; }
.nav-links a:hover { color: var(--brand); }
.hero { padding: 84px 0 64px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(290px, .85fr); gap: 48px; align-items: center; }
.eyebrow { color: var(--brand); font-weight: 750; font-size: .82rem; text-transform: uppercase; letter-spacing: .12em; }
h1 { font-size: clamp(2.35rem, 6vw, 4.25rem); line-height: 1.06; letter-spacing: -.045em; margin: 12px 0 22px; }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); line-height: 1.2; letter-spacing: -.025em; margin: 0 0 14px; }
h3 { margin-top: 0; }
.lead { font-size: 1.14rem; color: var(--muted); max-width: 760px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 46px; padding: 0 18px; border-radius: 10px;
  text-decoration: none; font-weight: 720; border: 1px solid transparent;
}
.btn-primary { background: var(--brand); color: white; }
.btn-primary:hover { background: var(--brand-dark); color: white; }
.btn-secondary { background: white; color: var(--text); border-color: var(--border); }
.btn-paypal { background: #ffc439; color: #111827; border-color: #e7ab23; }
.btn-paypal:hover { background: #f2b82d; color: #111827; }
.hero-card, .card, .policy, .notice {
  background: var(--surface); border: 1px solid var(--border); border-radius: 18px; box-shadow: var(--shadow);
}
.hero-card { padding: 28px; }
.hero-card img { width: 92px; height: 92px; border-radius: 20px; display: block; margin-bottom: 20px; }
.stat { padding: 12px 0; border-top: 1px solid var(--border); display: flex; justify-content: space-between; gap: 16px; }
.stat:first-of-type { margin-top: 16px; }
.stat strong { font-size: .95rem; }
.stat span { color: var(--muted); text-align: right; }
section { padding: 64px 0; }
.section-alt { background: #fff; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.card { padding: 24px; box-shadow: none; }
.card p { color: var(--muted); margin-bottom: 0; }
.badge { display: inline-block; border-radius: 999px; background: var(--surface-2); color: var(--brand-dark); padding: 5px 10px; font-size: .78rem; font-weight: 760; }
.check-list { padding-left: 0; list-style: none; }
.check-list li { position: relative; padding-left: 28px; margin: 10px 0; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: 850; }
.page-head { padding: 62px 0 30px; }
.page-head h1 { font-size: clamp(2.1rem, 5vw, 3.35rem); }
.policy { padding: clamp(22px, 4vw, 44px); margin-bottom: 64px; }
.policy h2 { margin-top: 36px; font-size: 1.45rem; }
.policy h2:first-child { margin-top: 0; }
.policy code { background: #f2f5fa; padding: 2px 6px; border-radius: 5px; }
.meta { color: var(--muted); }
.notice { padding: 20px 22px; box-shadow: none; border-left: 4px solid var(--brand); }
.faq details { background: white; border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; margin: 12px 0; }
.faq summary { cursor: pointer; font-weight: 720; }
.faq details p { color: var(--muted); }
footer { border-top: 1px solid var(--border); padding: 32px 0 48px; background: white; color: var(--muted); }
.footer-grid { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 15px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); }
.small { font-size: .88rem; color: var(--muted); }
.codeblock { overflow: auto; background: #111827; color: #f8fafc; padding: 16px; border-radius: 12px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .86rem; }
@media (max-width: 820px) {
  .hero-grid, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .nav { align-items: flex-start; padding: 13px 0; }
  .nav-links { gap: 10px 14px; justify-content: flex-end; }
  .hero { padding-top: 54px; }
}
@media (max-width: 560px) {
  .nav { display: block; }
  .nav-links { margin-top: 12px; justify-content: flex-start; }
}