:root {
  --bg: #f4f7fb;
  --surface: #fff;
  --text: #20252b;
  --muted: #65707c;
  --line: #dfe5ec;
  --primary: #0d6efd;
  --primary-dark: #0a58ca;
  --primary-soft: #e7f1ff;
  --success-soft: #eaf7ef;
}

* { box-sizing: border-box; }
body { margin: 0; color: var(--text); background: var(--bg); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: var(--primary-dark); }
.blog-shell { width: min(100% - 32px, 1040px); margin: 0 auto; padding: 24px 0 48px; }
.blog-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-size: 20px; font-weight: 850; text-decoration: none; }
.brand-mark { display: grid; width: 38px; height: 38px; place-items: center; color: #fff; background: var(--primary); border-radius: 50%; }
.calculator-link, .primary-link { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 16px; color: #fff; background: var(--primary); border-radius: 8px; font-weight: 800; text-decoration: none; }
.breadcrumbs { margin: 0 0 18px; color: var(--muted); font-size: 14px; }
.breadcrumbs a { color: inherit; }
.article, .blog-hero, .route-card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 8px 24px rgba(33, 37, 41, .05); }
.blog-hero { padding: clamp(24px, 5vw, 54px); }
.eyebrow { margin: 0 0 10px; color: var(--primary-dark); font-size: 13px; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; }
h1 { max-width: 820px; margin: 0; font-size: clamp(34px, 6vw, 58px); line-height: 1.04; letter-spacing: -.035em; }
.lead { max-width: 760px; margin: 18px 0 0; color: var(--muted); font-size: 18px; line-height: 1.65; }
.route-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 20px; }
.route-card { display: grid; gap: 12px; padding: 22px; text-decoration: none; }
.route-card:hover { border-color: #9ec5fe; transform: translateY(-1px); }
.route-card h2 { margin: 0; color: var(--text); font-size: 20px; }
.route-card p { margin: 0; color: var(--muted); line-height: 1.5; }
.route-card span { font-weight: 800; }
.article { padding: clamp(22px, 5vw, 52px); }
.article h1 { font-size: clamp(32px, 5vw, 50px); }
.article h2 { margin: 38px 0 12px; font-size: 26px; letter-spacing: -.015em; }
.article h3 { margin: 24px 0 8px; font-size: 19px; }
.article p, .article li { line-height: 1.7; }
.article p { margin: 12px 0; }
.article ul { padding-left: 22px; }
.meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 18px 0 0; color: var(--muted); font-size: 14px; }
.summary-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; margin: 28px 0; }
.summary-item { padding: 16px; background: #f8fafc; border: 1px solid var(--line); border-radius: 10px; }
.summary-item span { display: block; color: var(--muted); font-size: 12px; }
.summary-item strong { display: block; margin-top: 7px; font-size: 21px; }
.notice { margin: 24px 0; padding: 16px 18px; background: var(--primary-soft); border: 1px solid #b6d4fe; border-radius: 10px; line-height: 1.55; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { padding: 13px 12px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); background: #f8fafc; font-size: 13px; }
.cta { display: grid; gap: 12px; margin-top: 34px; padding: 24px; background: var(--success-soft); border: 1px solid #badbcc; border-radius: 12px; }
.cta h2, .cta p { margin: 0; }
.cta .primary-link { width: fit-content; }
.related { display: flex; flex-wrap: wrap; gap: 10px; }
.related a { padding: 9px 12px; background: #fff; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; text-decoration: none; }
.blog-footer { display: flex; justify-content: space-between; gap: 20px; margin-top: 28px; padding-top: 20px; color: var(--muted); border-top: 1px solid var(--line); font-size: 13px; }
@media (max-width: 760px) {
  .blog-shell { width: min(100% - 20px, 1040px); padding-top: 14px; }
  .blog-header, .blog-footer { align-items: flex-start; flex-direction: column; }
  .route-grid { grid-template-columns: 1fr; }
  .summary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}