:root {
  --primary: #667eea;
  --secondary: #764ba2;
  --ink: #2c3e50;
  --muted: #5a6c7d;
  --paper: #ffffff;
  --line: #e0e4ff;
  --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--ink);
  background: linear-gradient(135deg, #f5f7fa 0%, #dce3f3 100%);
  font-family: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.75;
}
.article-breadcrumb { background: #f0f2ff; border-bottom: 1px solid var(--line); padding: .65rem 0; }
.article-breadcrumb a { color: var(--primary); }
.article-hero { background: var(--gradient); color: #fff; padding: 4.5rem 1rem 5.5rem; text-align: center; }
.article-hero h1 { font-size: clamp(2rem, 5vw, 3.35rem); font-weight: 800; line-height: 1.16; margin: 0 auto 1rem; max-width: 980px; }
.article-deck { font-size: 1.12rem; margin: 0 auto 1.25rem; max-width: 780px; opacity: .94; }
.article-meta { display: flex; flex-wrap: wrap; gap: .7rem 1.4rem; justify-content: center; font-size: .92rem; }
.article-shell { margin: -3rem auto 3.5rem; max-width: 940px; padding: 0 1rem; position: relative; }
.blog-content { background: var(--paper); border-radius: 20px; box-shadow: 0 20px 60px rgba(32, 45, 85, .16); overflow: hidden; padding: 0 3.2rem 3rem; }
.hero-image { display: block; height: 360px; margin: 0 -3.2rem 2.5rem; object-fit: cover; width: calc(100% + 6.4rem); }
.blog-content h2 { border-bottom: 3px solid var(--primary); color: var(--primary); font-size: 1.85rem; line-height: 1.3; margin: 2.7rem 0 1rem; padding-bottom: .5rem; }
.blog-content h3 { color: var(--secondary); font-size: 1.35rem; margin: 2rem 0 .7rem; }
.blog-content p, .blog-content li { font-size: 1.03rem; }
.blog-content p { margin: 0 0 1.3rem; }
.blog-content li { margin-bottom: .65rem; }
.blog-content a { color: #5269dc; text-decoration-thickness: 1px; text-underline-offset: 2px; }
.quick-answer, .info-box, .warning-box { border-left: 4px solid var(--primary); border-radius: 10px; margin: 1.7rem 0; padding: 1.25rem 1.4rem; }
.quick-answer, .info-box { background: #f2f4ff; }
.warning-box { background: #fff4f1; border-left-color: #ef6c57; }
.quick-answer h2, .info-box h3, .warning-box h3 { border: 0; color: var(--ink); font-size: 1.2rem; margin: 0 0 .6rem; padding: 0; }
.formula { background: #202a44; border-radius: 10px; color: #fff; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; margin: 1.5rem 0; overflow-wrap: anywhere; padding: 1rem 1.25rem; }
.table-wrap { margin: 1.6rem 0; overflow-x: auto; }
table { border-collapse: collapse; min-width: 620px; width: 100%; }
th, td { border: 1px solid #dfe3ef; padding: .8rem; text-align: left; vertical-align: top; }
th { background: #eef1ff; color: #3f55bd; }
.checklist { background: #fafbff; border: 1px solid var(--line); border-radius: 12px; padding: 1.2rem 1.5rem 1rem 2.8rem; }
.sources { border-top: 1px solid var(--line); margin-top: 3rem; padding-top: .5rem; }
.sources h2 { font-size: 1.45rem; }
.sources li { font-size: .93rem; }
.article-cta { align-items: center; background: var(--gradient); border-radius: 14px; color: #fff; display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; margin-top: 2.5rem; padding: 1.5rem; }
.article-cta p { margin: 0; max-width: 560px; }
.article-cta a { background: #fff; border-radius: 999px; color: #5368d8; font-weight: 800; padding: .75rem 1.15rem; text-decoration: none; }
.modern-footer { background: #26334f; color: #fff; padding: 2rem 1rem; text-align: center; }
.modern-footer a { color: #fff; margin: 0 .6rem; }
@media (max-width: 768px) {
  .article-hero { padding-top: 3rem; }
  .blog-content { padding: 0 1.35rem 2rem; }
  .hero-image { height: 230px; margin-left: -1.35rem; margin-right: -1.35rem; width: calc(100% + 2.7rem); }
  .blog-content h2 { font-size: 1.5rem; }
}