:root {
  --body-bg: radial-gradient(circle at 50% -20%, rgba(0,212,170,0.10) 0%, transparent 48%), #000000;
  --card: rgba(255,255,255,0.06);
  --card-strong: rgba(255,255,255,0.09);
  --border: rgba(255,255,255,0.10);
  --accent: #00D4AA;
  --text: #FFFFFF;
  --dim: rgba(255,255,255,0.62);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); background: var(--body-bg); color: var(--text); line-height: 1.72; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
.article { max-width: 780px; margin: 0 auto; padding: 88px 24px 40px; }
.article-header { margin-bottom: 30px; }
.eyebrow { color: var(--accent); font-size: .78rem; font-weight: 800; letter-spacing: .10em; text-transform: uppercase; margin-bottom: 14px; }
.article-header h1 { color: var(--text); font-size: clamp(2.05rem, 5vw, 3.4rem); font-weight: 850; line-height: 1.1; margin-bottom: 16px; }
.article-meta { color: var(--dim); font-size: .92rem; }
.article-body { font-size: 1.05rem; color: rgba(255,255,255,0.82); }
.article-body > * + * { margin-top: 1.05rem; }
.article-body h2 { color: var(--accent); font-size: clamp(1.4rem, 3vw, 1.95rem); line-height: 1.18; font-weight: 800; margin-top: 2.5rem; }
.article-body h3 { color: var(--text); font-size: 1.16rem; line-height: 1.25; font-weight: 750; margin-top: 1.7rem; }
.article-body p { margin-bottom: 0; }
.article-body ul, .article-body ol { padding-left: 1.35rem; margin-top: 1rem; }
.article-body li { margin-top: .55rem; }
.article-body strong { color: var(--text); }
.article-body a { color: var(--accent); font-weight: 650; border-bottom: 1px solid rgba(255,255,255,0.18); }
.article-body a:hover { border-bottom-color: var(--accent); }
.tldr { background: rgba(0,212,170,0.06); border-left: 3px solid var(--accent); border-radius: 8px; padding: 15px 20px; margin-bottom: 8px; }
.tldr strong { color: var(--accent); display: block; font-size: .74rem; letter-spacing: .09em; text-transform: uppercase; margin-bottom: 6px; }
.tldr p { color: var(--text); margin: 0; }
.calc-example { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; margin-top: 1.2rem; font-size: 1rem; }
.calc-example .row { display: flex; justify-content: space-between; gap: 16px; padding: 6px 0; border-bottom: 1px dashed var(--border); }
.calc-example .row:last-child { border-bottom: 0; }
.calc-example .row span:first-child { color: var(--dim); }
.calc-example .row span:last-child { color: var(--text); font-weight: 700; }
.calc-example .out { color: var(--accent) !important; }
.med-disclaimer { background: rgba(0,212,170,0.08); border: 1px solid rgba(0,212,170,0.34); border-radius: 12px; padding: 16px 18px; margin-bottom: 24px; color: var(--dim); font-size: .95rem; line-height: 1.65; }
.med-disclaimer strong { color: var(--text); }
.faq { margin-top: 2.75rem; }
.faq-q { color: var(--text); font-weight: 750; font-size: 1.1rem; margin-top: 1.5rem; }
.faq-a { color: rgba(255,255,255,0.82); margin-top: .45rem; }
.cta-box { margin-top: 3rem; padding: 28px; background: var(--card-strong); border: 1px solid color-mix(in srgb, var(--accent) 55%, transparent); border-radius: 16px; }
.cta-box h2 { margin: 0 0 10px; color: var(--text); font-size: 1.45rem; }
.cta-box p { color: var(--dim); margin: 0 0 18px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.cta-btn { display: inline-flex; align-items: center; justify-content: center; background: var(--accent); color: #000 !important; padding: 13px 24px; border-radius: 10px; font-weight: 800; }
.related-articles { max-width: 780px; margin: 0 auto; padding: 8px 24px 72px; }
.related-articles h2 { color: var(--text); font-size: 1.25rem; margin-bottom: 14px; }
.related-articles a { display: block; color: var(--accent); padding: 11px 0; border-bottom: 1px solid var(--border); font-weight: 600; }