*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: Inter, system-ui, -apple-system, sans-serif; background: #F8FAFC; color: #0F172A; line-height: 1.7; }
    .skip-link { position: absolute; top: -40px; left: 0; background: #0284C7; color: #fff; padding: 8px 16px; z-index: 100; transition: top 0.2s; font-weight: 600; border-radius: 0 0 8px 0; text-decoration: none; }
    .skip-link:focus { top: 0; }

    .hero { background: linear-gradient(135deg, #0F172A 0%, #1e3a5f 100%); color: white; padding: 56px 24px 48px; text-align: center; }
    .hero-back { display: inline-block; color: rgba(255,255,255,0.75); font-size: 14px; font-weight: 500; text-decoration: none; margin-bottom: 20px; }
    .hero-back:hover { color: white; }
    .hero h1 { font-size: clamp(22px, 4.5vw, 38px); font-weight: 800; margin-bottom: 12px; letter-spacing: -0.5px; line-height: 1.2; }
    .hero .meta { font-size: 13px; color: rgba(255,255,255,0.65); margin-top: 14px; }
    .hero .meta span { background: rgba(255,255,255,0.12); padding: 3px 10px; border-radius: 100px; margin: 0 4px; }

    .article { max-width: 780px; margin: 0 auto; padding: 48px 24px 64px; }
    .article h2 { font-size: clamp(20px, 3vw, 26px); font-weight: 800; color: #0F172A; margin: 40px 0 14px; padding-bottom: 8px; border-bottom: 2px solid #E2E8F0; letter-spacing: -0.3px; }
    .article h3 { font-size: clamp(17px, 2.3vw, 20px); font-weight: 700; color: #1E3A5F; margin: 28px 0 10px; }
    .article p { margin-bottom: 16px; font-size: 16px; }
    .article ul, .article ol { margin: 0 0 20px 24px; }
    .article li { margin-bottom: 8px; font-size: 16px; }
    .article a { color: #0284C7; text-decoration: none; font-weight: 600; }
    .article a:hover { text-decoration: underline; }
    .article strong { color: #0F172A; }

    .toc { background: #fff; border: 2px solid #E2E8F0; border-radius: 12px; padding: 20px 24px; margin: 0 0 40px; }
    .toc-title { font-weight: 800; font-size: 14px; color: #0F172A; margin-bottom: 12px; letter-spacing: -0.2px; }
    .toc ol { margin: 0 0 0 20px; }
    .toc li { margin-bottom: 6px; font-size: 14px; }
    .toc a { color: #0284C7; text-decoration: none; font-weight: 600; }
    .toc a:hover { text-decoration: underline; }

    .callout { background: #FEF3C7; border-left: 4px solid #F59E0B; padding: 16px 20px; border-radius: 8px; margin: 24px 0; }
    .callout strong { color: #78350F; }

    .highlight-box { background: linear-gradient(135deg, #EFF6FF, #fff); border: 1px solid #BFDBFE; border-radius: 12px; padding: 24px; margin: 28px 0; }
    .highlight-box h3 { margin-top: 0; color: #1E40AF; }

    .formula-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 15px; background: #fff; border-radius: 10px; overflow: hidden; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
    .formula-table th { background: #0F172A; color: white; text-align: left; padding: 12px 14px; font-weight: 700; font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px; }
    .formula-table td { padding: 11px 14px; border-bottom: 1px solid #E2E8F0; }
    .formula-table tr:last-child td { border-bottom: none; }

    .faq-item { border-bottom: 1px solid #E2E8F0; padding: 18px 0; }
    .faq-item:last-child { border-bottom: none; }
    .faq-q { font-weight: 700; color: #0F172A; margin-bottom: 8px; font-size: 16px; }

    .cta-card { background: linear-gradient(135deg, #0F172A, #1E3A5F); color: white; border-radius: 16px; padding: 36px 28px; text-align: center; margin: 48px 0 16px; }
    .cta-card h2 { color: white; border: none; padding: 0; margin: 0 0 10px; font-size: 22px; }
    .cta-card p { color: rgba(255,255,255,0.8); margin-bottom: 20px; }
    .cta-btn { display: inline-block; background: #0EA5E9; color: white; font-weight: 700; padding: 13px 32px; border-radius: 50px; text-decoration: none; font-size: 15px; }
    .cta-btn:hover { background: #0284C7; }

    .related { background: #fff; border-radius: 12px; padding: 24px; margin: 32px 0; border: 1px solid #E2E8F0; }
    .related h3 { margin-top: 0; color: #0F172A; font-size: 16px; }
    .related ul { list-style: none; margin: 0; padding: 0; }
    .related li { padding: 6px 0; border-bottom: 1px solid #F1F5F9; }
    .related li:last-child { border-bottom: none; }
    .related a { color: #0284C7; text-decoration: none; font-weight: 600; }
    .related a:hover { text-decoration: underline; }

    footer { background: #0F172A; color: rgba(255,255,255,0.6); text-align: center; padding: 24px; font-size: 13px; margin-top: 40px; }
    footer a { color: rgba(255,255,255,0.85); text-decoration: none; margin: 0 8px; }

    @media (max-width: 600px) { .article { padding: 32px 16px 48px; } }
    :focus-visible { outline: 3px solid #0EA5E9; outline-offset: 2px; border-radius: 4px; }
  .cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: white;
  border-top: 1px solid var(--gray-200, #e2e8f0);
  box-shadow: 0 -4px 12px rgba(0,0,0,0.08);
  padding: 16px;
  animation: cookieSlideUp 0.3s ease;
}
@keyframes cookieSlideUp { from { transform: translateY(100%); } to { transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) {
  .cookie-consent { animation: none; }
}
.cookie-consent-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.cookie-consent-inner p { font-size: 14px; color: var(--gray-700, #334155); margin: 0; }
.cookie-consent-inner a { color: #0369A1; font-weight: 500; }
.cookie-consent-actions { display: flex; gap: 8px; flex-shrink: 0; }
.cookie-btn { padding: 8px 20px; border-radius: 8px; font-size: 14px; font-weight: 500; cursor: pointer; border: none; transition: all 0.15s; font-family: inherit; }
.cookie-btn:focus-visible { outline: 3px solid #0369a1; outline-offset: 2px; }
.cookie-btn-decline { background: var(--gray-100, #f1f5f9); color: var(--gray-700, #334155); }
.cookie-btn-decline:hover { background: var(--gray-200, #e2e8f0); }
.cookie-btn-accept { background: #0284C7; color: white; }
.cookie-btn-accept:hover { background: #0284C7; }

.inline-cta {
  background: linear-gradient(135deg, #F0F9FF, #EFF6FF);
  border: 1px solid #BFDBFE;
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  margin: 32px 0;
}
.inline-cta p {
  font-size: 16px;
  font-weight: 600;
  color: #1E293B;
  margin-bottom: 12px;
}
.social-share {
  text-align: center;
  padding: 24px 0;
  margin-top: 32px;
  border-top: 1px solid #E2E8F0;
}
.social-share p {
  font-size: 14px;
  color: #64748B;
  margin-bottom: 12px;
}
.social-share-btns {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.social-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid #E2E8F0;
  background: white;
  color: #475569;
  cursor: pointer;
  transition: all 0.15s;
}
.social-btn:hover { background: #F8FAFC; border-color: #CBD5E1; }