:root {
  color-scheme: light;
  --ink: #1c2440;
  --muted: #59627c;
  --paper: #f8f9fd;
  --surface: #fff;
  --line: #e4e8f2;
  --purple: #5846e8;
  --purple-dark: #3e32b2;
  --blue-soft: #e9f0ff;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-size: 16px; line-height: 1.72; }
a { color: var(--purple-dark); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--purple); }
a:focus-visible, summary:focus-visible { outline: 3px solid #9d94ff; outline-offset: 3px; border-radius: 4px; }
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.site-header-inner, .footer-inner { width: min(1120px, calc(100% - 40px)); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.site-header-inner { min-height: 76px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-size: 1.03rem; font-weight: 750; text-decoration: none; white-space: nowrap; }
.brand strong { color: var(--purple); }
.brand-mark { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 13px; background: var(--purple); color: white; font-weight: 800; }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a { color: var(--muted); font-size: .92rem; text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--purple-dark); font-weight: 700; }
.site-nav .nav-cta { padding: 9px 15px; border-radius: 9px; background: var(--purple); color: white; font-weight: 650; }
.site-nav .nav-cta:hover, .button-primary:hover { background: var(--purple-dark); color: white; }
.hero { background: linear-gradient(115deg, #f0efff 0%, #edf5ff 78%, #f7fbff 100%); border-bottom: 1px solid var(--line); }
.hero-inner { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 74px 0 68px; }
.eyebrow, .article-kicker { color: var(--purple-dark); font-size: .73rem; font-weight: 800; letter-spacing: .12em; line-height: 1.4; }
.hero h1 { max-width: 780px; margin: 14px 0 16px; font-size: clamp(2.25rem, 5vw, 3.8rem); line-height: 1.08; letter-spacing: -.045em; }
.hero-copy { max-width: 690px; margin: 0 0 24px; color: var(--muted); font-size: 1.13rem; }
.button { display: inline-flex; align-items: center; gap: 12px; padding: 12px 18px; border-radius: 9px; font-weight: 700; text-decoration: none; }
.button-primary { background: var(--purple); color: white; }
.hero-note { margin: 13px 0 0; color: var(--muted); font-size: .83rem; }
.content-layout { display: grid; grid-template-columns: minmax(0, 730px) 270px; align-items: start; gap: 48px; width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 56px 0 80px; }
.article-content { min-width: 0; }
.article-content > .article-kicker { margin: 0 0 9px; }
.article-content h1, .article-content h2 { line-height: 1.24; letter-spacing: -.025em; }
.article-content > h1 { margin: 0 0 18px; font-size: clamp(2rem, 4vw, 3rem); }
.article-content > h2, .content-section h2 { margin: 0 0 14px; font-size: 1.55rem; }
.article-content p { color: #424d68; }
.content-section { margin-top: 42px; }
.content-section h3 { margin: 0 0 8px; font-size: 1.04rem; }
.steps-list { display: grid; gap: 12px; padding-left: 23px; color: #424d68; }
.example-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 20px 0; }
.example-card { padding: 17px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.example-card p { margin: 0; font-size: .92rem; }
.ad-panel { min-height: 120px; margin: 38px 0; padding: 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.ad-label { display: block; margin-bottom: 6px; color: #68718a; font-size: .68rem; letter-spacing: .08em; text-align: center; text-transform: uppercase; }
.guide-links { display: grid; gap: 12px; margin-top: 18px; }
.guide-links a { display: grid; gap: 4px; padding: 17px 19px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); text-decoration: none; }
.guide-links a:hover { border-color: #c3bfff; box-shadow: 0 8px 20px #2720500c; }
.guide-links strong { color: var(--purple-dark); }
.guide-links span { color: var(--muted); font-size: .91rem; }
.faq-section details { padding: 15px 0; border-top: 1px solid var(--line); }
.faq-section summary { color: var(--ink); font-weight: 700; cursor: pointer; }
.faq-section details p { margin-bottom: 0; }
.reading-card { position: sticky; top: 22px; padding: 22px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.reading-card .eyebrow { margin: 0; }
.reading-card h2 { margin: 8px 0 10px; font-size: 1.18rem; line-height: 1.3; }
.reading-card ul { display: grid; gap: 10px; margin: 0 0 18px; padding-left: 20px; color: var(--muted); font-size: .91rem; }
.text-link { font-weight: 700; text-decoration: none; }
.article-meta { color: #6b7388; font-size: .84rem; }
.callout { margin: 22px 0; padding: 17px 20px; border-left: 4px solid var(--purple); border-radius: 0 10px 10px 0; background: var(--blue-soft); color: #38415b; }
.callout p:last-child { margin-bottom: 0; }
.policy-list { padding-left: 22px; color: #424d68; }
.site-footer { border-top: 1px solid var(--line); background: var(--surface); }
.footer-inner { min-height: 80px; padding: 18px 0; color: var(--muted); font-size: .84rem; }
.footer-inner nav { display: flex; flex-wrap: wrap; gap: 17px; }
.footer-inner a { text-decoration: none; }
.breadcrumb { margin: 0 0 18px; color: var(--muted); font-size: .87rem; }
.breadcrumb a { text-decoration: none; }
.age-note { color: var(--muted); font-size: .9rem; }

@media (max-width: 820px) {
  .site-header-inner { align-items: flex-start; flex-direction: column; justify-content: center; gap: 12px; padding: 14px 0; }
  .site-nav { flex-wrap: wrap; gap: 11px 17px; }
  .content-layout { grid-template-columns: minmax(0, 1fr); gap: 28px; padding-top: 36px; }
  .reading-card { position: static; grid-row: 1; }
  .hero-inner { padding: 54px 0; }
}
@media (max-width: 580px) {
  .site-header-inner, .footer-inner, .hero-inner, .content-layout { width: min(100% - 28px, 1120px); }
  .site-nav { gap: 9px 13px; }
  .site-nav a { font-size: .84rem; }
  .site-nav .nav-cta { padding: 7px 10px; }
  .hero h1 { font-size: 2.25rem; }
  .hero-copy { font-size: 1rem; }
  .example-grid { grid-template-columns: 1fr; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; gap: 8px; }
}