:root {
  --bg: #f5f8fc;
  --panel: rgba(255, 255, 255, 0.92);
  --line: rgba(15, 23, 42, 0.08);
  --text: #0f172a;
  --muted: #52607a;
  --brand: #0f4c81;
  --brand-2: #2b8bd6;
  --accent: #1f9d7a;
  --warning: #f59e0b;
  --danger: #dc2626;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  --radius: 24px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  line-height: 1.6;
  background:
    radial-gradient(circle at top left, rgba(43, 139, 214, 0.10), transparent 28%),
    radial-gradient(circle at top right, rgba(31, 157, 122, 0.08), transparent 22%),
    linear-gradient(180deg, #f7fbff 0%, #eef4fb 100%);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--brand); color: #fff;
  padding: 12px 16px; border-radius: 10px; z-index: 9999;
}
.skip-link:focus { left: 16px; top: 16px; }

.wrap { width: min(100% - 32px, var(--max)); margin: 0 auto; }

.topbar {
  position: sticky; top: 0; z-index: 1000; backdrop-filter: blur(18px);
  background: rgba(255,255,255,0.82); border-bottom: 1px solid var(--line);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 14px 0;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: fit-content; }
.brand-mark {
  width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(145deg, var(--brand), var(--brand-2)); color: #fff; font-weight: 900;
  box-shadow: 0 14px 30px rgba(15, 76, 129, 0.18);
}
.brand-text strong { display: block; font-size: 1.05rem; letter-spacing: 0.2px; }
.brand-text span { color: var(--muted); font-size: 0.9rem; }

.nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; }
.nav a {
  color: var(--muted); padding: 8px 12px; border-radius: 999px; border: 1px solid transparent;
  transition: 0.2s ease; font-size: 0.95rem;
}
.nav a:hover, .nav a:focus {
  color: var(--brand); border-color: rgba(15, 76, 129, 0.16); background: rgba(15, 76, 129, 0.05);
}

.hero { padding: 52px 0 18px; }
.hero-grid {
  display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 22px; align-items: stretch;
}
.hero-main, .hero-side, .section, .info-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}
.hero-main {
  padding: 34px; position: relative; overflow: hidden;
}
.hero-main::before {
  content: ""; position: absolute; inset: auto -120px -120px auto; width: 300px; height: 300px;
  border-radius: 50%; background: radial-gradient(circle, rgba(43, 139, 214, 0.14), transparent 65%);
  pointer-events: none;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: 999px;
  background: rgba(15, 76, 129, 0.08); border: 1px solid rgba(15, 76, 129, 0.12);
  color: var(--brand); font-size: 0.88rem; margin-bottom: 18px;
}
h1 {
  margin: 0 0 16px; font-size: clamp(2.2rem, 5vw, 4.4rem); line-height: 1.02;
  letter-spacing: -0.04em; color: #0b1b2d;
}
.lead { max-width: 68ch; margin: 0 0 24px; color: var(--muted); font-size: 1.05rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 13px 18px;
  border-radius: 14px; font-weight: 700; border: 1px solid transparent; transition: 0.2s ease; white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: white;
  box-shadow: 0 16px 32px rgba(15, 76, 129, 0.18);
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-secondary { background: #ffffff; border-color: var(--line); color: var(--text); }
.btn-secondary:hover { background: #f8fbff; }

.hero-side { padding: 22px; display: grid; gap: 14px; align-content: start; }
.stat {
  background: rgba(255,255,255,0.72); border: 1px solid var(--line); border-radius: 18px; padding: 16px;
}
.stat .label { color: var(--muted); font-size: 0.9rem; margin-bottom: 6px; }
.stat .value { font-size: 1.12rem; font-weight: 800; margin-bottom: 4px; color: #0b1b2d; }
.stat .desc { color: var(--muted); font-size: 0.92rem; }

main { padding: 8px 0 64px; }
.section { padding: 28px; margin-top: 20px; }
.section h2 {
  margin: 0 0 12px; font-size: clamp(1.45rem, 2.5vw, 2.05rem); letter-spacing: -0.02em; color: #0b1b2d;
}
.section h3 { margin-top: 0; }
.section p, .section li { color: var(--muted); font-size: 1rem; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.info-card {
  padding: 18px; background: rgba(255,255,255,0.82);
}

.check-list, .symptom-list {
  list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 10px;
}
.check-list li, .symptom-list li { position: relative; padding-left: 28px; }
.check-list li::before, .symptom-list li::before {
  content: ""; position: absolute; left: 0; top: 0.46em; width: 14px; height: 14px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-2)); box-shadow: 0 0 0 4px rgba(15, 76, 129, 0.08);
}

.callout {
  border-left: 4px solid var(--warning); background: rgba(245, 158, 11, 0.10); padding: 16px 18px;
  border-radius: 16px; margin-top: 16px; color: #7a4c00;
}
.warning {
  border-left-color: var(--danger); background: rgba(220, 38, 38, 0.08); color: #991b1b;
}

.overview-grid {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 18px; margin-top: 10px;
}
.facts { display: grid; gap: 12px; }
.fact {
  padding: 16px; border-radius: 18px; background: rgba(255,255,255,0.74); border: 1px solid var(--line);
}
.fact strong { display: block; margin-bottom: 4px; color: #0b1b2d; }

.pill-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.pill {
  padding: 8px 12px; border-radius: 999px; background: rgba(15, 76, 129, 0.05);
  border: 1px solid rgba(15, 76, 129, 0.10); color: #163455; font-size: 0.92rem;
}

.faq { display: grid; gap: 12px; margin-top: 14px; }
.faq-item {
  overflow: hidden; border-radius: 18px; border: 1px solid var(--line); background: rgba(255,255,255,0.82);
}
.faq-q {
  width: 100%; border: 0; background: transparent; color: var(--text); text-align: left; padding: 16px 18px;
  cursor: pointer; font-size: 1rem; font-weight: 700; display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq-a { display: none; padding: 0 18px 16px; color: var(--muted); }
.faq-item.open .faq-a { display: block; }

.footer {
  padding: 20px 0 42px; color: var(--muted); font-size: 0.95rem;
}
.footer-box {
  padding-top: 18px; border-top: 1px solid var(--line); display: grid; gap: 10px;
}
.micro { font-size: 0.88rem; color: #64748b; }

.toc { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.toc a {
  display: inline-flex; padding: 9px 12px; border-radius: 999px; background: rgba(255,255,255,0.9);
  border: 1px solid var(--line); color: #163455; font-size: 0.92rem;
}

.sources-list {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--muted);
}
.sources-list a {
  color: var(--brand);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.small-note {
  font-size: .92rem;
  color: var(--muted);
  margin-top: 10px;
}

.ad-wrap {
  margin-top: 20px;
  margin-bottom: 0;
  padding: 12px 0;
}

@media (max-width: 920px) {
  .hero-grid, .grid-2, .overview-grid { grid-template-columns: 1fr; }
  .nav { display: none; }
  .hero-main { padding: 26px; }
}
@media (max-width: 640px) {
  .wrap { width: min(100% - 22px, var(--max)); }
  .hero { padding-top: 24px; }
  .section, .hero-main, .hero-side { border-radius: 20px; }
  h1 { font-size: clamp(2rem, 11vw, 3rem); }
  .btn { width: 100%; }
  .hero-actions { flex-direction: column; }
}