:root{--bg:#f7f8f8;--surface:#fff;--ink:#102224;--muted:#56676a;--line:#dce5e3;--brand:#0b6b63;--brand-dark:#084f49;--soft:#eaf5f3;--warn:#fff8e6;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.78;text-rendering:optimizeLegibility}.locale-fa{font-family:Estedad,"Segoe UI","Geeza Pro",Tahoma,Arial,sans-serif;letter-spacing:0}.locale-fa h1,.locale-fa h2,.locale-fa h3,.locale-fa h4,.locale-fa strong,.locale-fa b{font-family:Estedad,"Segoe UI","Geeza Pro",Tahoma,Arial,sans-serif;letter-spacing:0}.seo-shell{width:min(var(--max),calc(100% - 36px));margin-inline:auto}.skip-link{position:absolute;inset-inline-start:16px;top:-80px;z-index:50;background:#000;color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}.seo-site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.header-inner{min-height:78px;display:flex;align-items:center;gap:24px}.seo-brand{display:inline-flex;align-items:center;flex:0 0 auto}.seo-brand img{display:block;max-width:100%;height:auto}.seo-nav{display:flex;gap:18px;align-items:center;flex:1;justify-content:center;flex-wrap:wrap}.seo-nav a,.language-pill{color:var(--ink);text-decoration:none;font-weight:650;font-size:.95rem}.seo-nav a:hover,.language-pill:hover{color:var(--brand)}.language-pill{border:1px solid var(--line);padding:7px 11px;border-radius:999px;background:#fff}.article-layout{padding-block:28px 72px}.breadcrumbs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:.9rem;margin-bottom:32px}.breadcrumbs a{color:var(--brand-dark);text-decoration:none}.article-hero{max-width:930px;margin-inline:auto;text-align:start;padding:42px 0 38px}.eyebrow{text-transform:uppercase;letter-spacing:.1em;font-size:.78rem;font-weight:800;color:var(--brand);margin:0 0 12px}.locale-fa .eyebrow{text-transform:none;letter-spacing:0}.article-hero h1{font-size:clamp(2.15rem,5vw,4.25rem);line-height:1.07;letter-spacing:-.035em;margin:0 0 22px}.locale-fa .article-hero h1{letter-spacing:-.02em}.lead{font-size:clamp(1.05rem,2vw,1.32rem);line-height:1.85;color:#263b3d;margin:0}.lead a,.article-body a{color:var(--brand-dark);text-underline-offset:3px}.review-line{display:flex;gap:18px;flex-wrap:wrap;margin-top:24px;color:var(--muted);font-size:.91rem}.brand-disclosure{margin-top:22px;padding:16px 18px;background:var(--warn);border:1px solid #ead9a8;border-radius:14px}.article-share{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:22px}.article-share span{color:var(--muted);font-size:.9rem}.article-share a{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 11px;text-decoration:none;color:var(--ink);font-size:.9rem;font-weight:650}.article-grid{display:grid;grid-template-columns:260px minmax(0,1fr);gap:46px;align-items:start}.toc{position:sticky;top:104px;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:20px}.toc h2{font-size:1rem;margin:0 0 12px}.toc ol{margin:0;padding-inline-start:20px}.toc li{margin:5px 0}.toc a{text-decoration:none;color:#315356;font-size:.92rem}.toc a:hover{color:var(--brand)}.article-body{min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:clamp(24px,5vw,58px);box-shadow:0 16px 50px rgba(14,45,42,.05)}.article-body section{scroll-margin-top:110px;margin-bottom:48px}.article-body h2{font-size:clamp(1.5rem,3vw,2.25rem);line-height:1.2;margin:0 0 18px;letter-spacing:-.025em}.article-body h3{font-size:1.25rem;line-height:1.35;margin:28px 0 8px}.article-body p{margin:0 0 17px;color:#2d4143}.definition-box,.callout,.medical-note{padding:18px 20px;border-radius:14px;background:var(--soft);border-inline-start:4px solid var(--brand);margin:22px 0}.table-wrap{width:100%;overflow:auto;margin:22px 0 28px;border:1px solid var(--line);border-radius:14px}table{width:100%;border-collapse:collapse;min-width:660px;background:#fff}th,td{text-align:start;padding:13px 15px;border-bottom:1px solid var(--line);vertical-align:top}th{background:#eff6f4;font-size:.9rem}tr:last-child td{border-bottom:0}.glossary{display:grid;grid-template-columns:minmax(150px,220px) 1fr;gap:0;border-top:1px solid var(--line)}.glossary dt,.glossary dd{margin:0;padding:13px 0;border-bottom:1px solid var(--line)}.glossary dt{font-weight:800;padding-inline-end:18px}.article-body details{border:1px solid var(--line);border-radius:12px;padding:0 16px;margin:10px 0;background:#fff}.article-body summary{cursor:pointer;font-weight:750;padding:14px 0}.article-body details p{padding-bottom:14px}.references{padding-inline-start:22px}.references li{margin:10px 0}.source-note{font-size:.93rem;color:var(--muted)}.citation{font-size:.78em;vertical-align:super;text-decoration:none;font-weight:800}.medical-note{margin-top:54px;background:#f4f7f7;color:#354749}.seo-site-footer{background:#102224;color:#eaf2f1;padding:48px 0 20px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr .8fr;gap:40px}.footer-grid h2{font-size:1rem;margin:0 0 12px}.footer-grid p{color:#bdcfcc;max-width:480px}.footer-grid>div>a:not(.seo-brand){display:block;color:#eaf2f1;text-decoration:none;margin:8px 0}.linkedin-company-link{display:inline-flex!important;align-items:center;gap:9px;width:max-content;border:1px solid #5c7f7b;border-radius:999px;padding:9px 13px;margin-top:8px!important;background:#0a66c2;color:#fff!important;font-weight:800}.footer-legal{border-top:1px solid #2a4542;margin-top:34px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;color:#aac0bd;font-size:.84rem}.seo-hub-injection{margin:28px auto 70px;max-width:1180px;padding:28px;border:1px solid #dce5e3;border-radius:22px;background:#f7fbfa}.seo-hub-injection h2{margin-top:0}.seo-hub-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.seo-hub-links a{display:block;padding:18px;border:1px solid #dce5e3;border-radius:14px;background:#fff;color:#102224;text-decoration:none}.seo-hub-links a strong{display:block;margin-bottom:5px}.official-linkedin-wrap{margin-top:14px}.official-linkedin-profile{display:inline-flex!important;align-items:center;gap:8px;padding:8px 12px!important;border-radius:999px;background:#0a66c2!important;color:#fff!important;text-decoration:none!important;font-weight:800}.official-linkedin-profile svg{flex:0 0 auto}@media(max-width:900px){.header-inner{flex-wrap:wrap;padding-block:12px}.seo-nav{order:3;width:100%;justify-content:flex-start;overflow:auto;flex-wrap:nowrap;padding-bottom:8px}.article-grid{grid-template-columns:1fr}.toc{position:relative;top:auto}.footer-grid{grid-template-columns:1fr 1fr}.seo-hub-links{grid-template-columns:1fr}}@media(max-width:600px){.seo-shell{width:min(100% - 24px,var(--max))}.article-hero{padding-top:24px}.article-body{border-radius:18px;padding:22px 18px}.footer-grid{grid-template-columns:1fr}.glossary{grid-template-columns:1fr}.glossary dt{padding-bottom:4px;border-bottom:0}.glossary dd{padding-top:0}.article-hero h1{font-size:2.35rem}}

/* v3.5.1 Persian typography */
.locale-fa{line-height:1.9}.locale-fa .article-hero h1{font-weight:750;line-height:1.28;letter-spacing:0}.locale-fa .article-body h2{font-weight:720;line-height:1.38;letter-spacing:0}.locale-fa .article-body h3{font-weight:700;line-height:1.45}