:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #5f6b7a;
  --line: #dfe5ec;
  --soft: #f5f7fa;
  --accent: #1456d9;
  --accent-dark: #0d3d9e;
  --warning-bg: #fff7e6;
  --warning-border: #f0bf5c;
  --max: 1080px;
  --reading: 760px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
a:focus-visible { outline: 3px solid rgba(20,86,217,.28); outline-offset: 3px; border-radius: 4px; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.safety-banner {
  padding: 9px 20px;
  background: var(--warning-bg);
  border-bottom: 1px solid var(--warning-border);
  color: #5f4300;
  text-align: center;
  font-size: .9rem;
}
.site-header { border-bottom: 1px solid var(--line); background: rgba(255,255,255,.98); }
.header-inner { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.wordmark { color: var(--ink); text-decoration: none; font-size: 1.35rem; font-weight: 800; letter-spacing: -.035em; }
.wordmark span { color: var(--accent); }
.site-nav { display: flex; gap: 20px; margin-left: auto; }
.site-nav a { color: var(--muted); text-decoration: none; font-weight: 680; font-size: .94rem; }
.site-nav a:hover { color: var(--ink); }
.header-note { color: var(--muted); font-size: .9rem; }
.hero { padding: clamp(62px, 9vw, 110px) 0 58px; }
.eyebrow { margin: 0 0 16px; color: var(--accent); font-size: .83rem; font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
h1 { max-width: 900px; margin: 0; font-size: clamp(2.5rem, 7.5vw, 5.6rem); line-height: .99; letter-spacing: -.06em; }
.lede { max-width: 780px; margin: 28px 0 0; color: var(--muted); font-size: clamp(1.08rem, 2.2vw, 1.35rem); }
.notice { max-width: 850px; margin-top: 34px; padding: 18px 20px; border: 1px solid var(--warning-border); border-radius: 14px; background: var(--warning-bg); font-weight: 650; }
.section { padding: 62px 0; border-top: 1px solid var(--line); }
.section h2 { margin: 0 0 14px; font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.1; letter-spacing: -.04em; }
.section-intro { max-width: 760px; margin: 0 0 30px; color: var(--muted); font-size: 1.05rem; }
.intent-grid, .feature-grid, .guide-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.intent-card, .feature-card, .guide-card, .legacy-card { border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.intent-card, .guide-card { min-height: 110px; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 22px; color: var(--ink); text-decoration: none; font-weight: 750; transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease; }
.intent-card:hover, .guide-card:hover { color: var(--ink); border-color: #aebbd0; transform: translateY(-2px); box-shadow: 0 12px 30px rgba(17,24,39,.08); }
.guide-card { display: block; }
.guide-card h3 { margin: 0 0 8px; font-size: 1.17rem; line-height: 1.25; }
.guide-card p { margin: 0; color: var(--muted); font-weight: 450; }
.arrow { color: var(--accent); font-size: 1.35rem; }
.feature-card { padding: 24px; background: var(--soft); }
.feature-card h3 { margin: 0 0 8px; font-size: 1.1rem; }
.feature-card p { margin: 0; color: var(--muted); }
.legacy-card { padding: clamp(24px, 5vw, 42px); display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; }
.legacy-card h2 { margin: 0 0 10px; }
.legacy-card p { margin: 0; color: var(--muted); max-width: 710px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 20px; border-radius: 999px; background: var(--accent); color: white; text-decoration: none; font-weight: 800; white-space: nowrap; }
.button:hover { color: white; background: var(--accent-dark); }
.site-footer { padding: 32px 0 48px; border-top: 1px solid var(--line); color: var(--muted); }
.footer-inner { display: flex; justify-content: space-between; gap: 15px 28px; flex-wrap: wrap; }
.footer-inner p { margin: 0; }
.footer-disclosure { flex-basis: 100%; font-size: .88rem; }
.utility-main { min-height: calc(100vh - 180px); display: grid; place-items: center; padding: 60px 0; }
.utility-card { width: min(100%, 720px); padding: clamp(28px, 6vw, 54px); border: 1px solid var(--line); border-radius: 22px; box-shadow: 0 20px 60px rgba(17,24,39,.08); }
.utility-card h1 { font-size: clamp(2.3rem, 7vw, 4.6rem); }
.utility-card p { color: var(--muted); font-size: 1.1rem; }
.utility-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.secondary-link { display: inline-flex; align-items: center; min-height: 48px; padding: 0 18px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink); text-decoration: none; font-weight: 750; }
.secondary-link:hover { color: var(--ink); border-color: #aebbd0; }
.content-main { padding: clamp(50px, 8vw, 92px) 0 80px; }
.prose { width: min(100%, var(--reading)); }
.prose h1 { font-size: clamp(2.4rem, 6vw, 4.6rem); margin-bottom: 22px; }
.prose .intro { color: var(--muted); font-size: 1.18rem; margin-bottom: 36px; }
.prose h2 { margin: 42px 0 12px; font-size: clamp(1.45rem, 3vw, 2rem); line-height: 1.2; letter-spacing: -.025em; }
.prose h3 { margin: 30px 0 8px; font-size: 1.18rem; }
.prose p, .prose li { color: #364152; }
.prose li + li { margin-top: 9px; }
.prose .callout { margin: 30px 0; padding: 18px 20px; border-left: 4px solid var(--accent); background: var(--soft); border-radius: 0 12px 12px 0; }
.prose .callout p { margin: 0; color: var(--ink); }
.breadcrumbs { margin-bottom: 24px; color: var(--muted); font-size: .92rem; }
.breadcrumbs a { color: var(--muted); }
.updated { margin-top: 42px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.page-list { list-style: none; padding: 0; margin: 30px 0 0; }
.page-list li { border-top: 1px solid var(--line); }
.page-list a { display: block; padding: 20px 0; color: var(--ink); text-decoration: none; font-weight: 760; }
.page-list a span { display: block; color: var(--muted); font-weight: 450; margin-top: 4px; }
@media (max-width: 760px) {
  .header-note { display: none; }
  .site-nav { gap: 13px; }
  .site-nav a { font-size: .88rem; }
  .intent-grid, .feature-grid, .guide-grid { grid-template-columns: 1fr; }
  .legacy-card { grid-template-columns: 1fr; }
  .button { width: 100%; }
}
@media (max-width: 470px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .header-inner { gap: 12px; }
  .site-nav a:nth-child(3) { display: none; }
  .safety-banner { text-align: left; padding-inline: 14px; }
}