:root{--color-primary:#0ea5e9;--color-secondary:#0284c7;--color-success:#22c55e;--color-warning:#f59e0b;--color-danger:#ef4444;--color-ink:#0f172a;--color-muted:#475569;--color-line:#dbe7ef;--color-soft:#f5f9fc;--color-white:#ffffff;--shadow-soft:0 18px 48px rgba(15,23,42,0.09);--radius:8px;--container:1180px;}*{box-sizing:border-box;}html{scroll-behavior:smooth;}body{margin:0;color:var(--color-ink);background:var(--color-white);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;font-size:16px;line-height:1.65;text-rendering:optimizeLegibility;}img,svg{max-width:100%;height:auto;}a{color:var(--color-secondary);text-decoration-thickness:0.08em;text-underline-offset:0.18em;}a:hover{color:#0369a1;}button,input,select{font:inherit;}.container{width:min(100% - 32px,var(--container));margin-inline:auto;}.narrow{width:min(100% - 32px,820px);}.screen-reader-text,.skip-link:not(:focus){position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}.skip-link:focus{position:fixed;z-index:1000;top:12px;left:12px;padding:10px 14px;background:var(--color-ink);color:var(--color-white);border-radius:var(--radius);}.site-header{position:sticky;z-index:100;top:0;background:rgba(255,255,255,0.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,231,239,0.86);transition:box-shadow 180ms ease;}.site-header.is-scrolled{box-shadow:0 10px 30px rgba(15,23,42,0.08);}.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:74px;gap:24px;}.site-logo{display:inline-flex;align-items:center;min-width:186px;}.site-logo img{display:block;width:214px;height:48px;object-fit:contain;}.primary-nav .menu,.footer-menu{display:flex;align-items:center;gap:22px;padding:0;margin:0;list-style:none;}.primary-nav a{color:var(--color-ink);font-size:0.94rem;font-weight:700;text-decoration:none;}.primary-nav a:hover{color:var(--color-secondary);}.nav-toggle{display:none;width:44px;height:44px;padding:0;border:1px solid var(--color-line);border-radius:var(--radius);background:var(--color-white);}.nav-toggle span:not(.screen-reader-text){display:block;width:20px;height:2px;margin:4px auto;background:var(--color-ink);}.hero{padding:64px 0 40px;background:radial-gradient(circle at 20% 20%,rgba(14,165,233,0.12),transparent 32%),linear-gradient(180deg,#f7fbfe 0%,#ffffff 100%);}.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(360px,0.75fr);align-items:center;gap:42px;}.eyebrow{margin:0 0 12px;color:var(--color-secondary);font-size:0.78rem;font-weight:800;letter-spacing:0;text-transform:uppercase;}h1,h2,h3{margin:0 0 16px;line-height:1.12;letter-spacing:0;}h1{font-size:clamp(2.45rem,6vw,5.25rem);max-width:780px;}h2{font-size:clamp(1.85rem,3vw,3rem);}h3{font-size:1.22rem;}p{margin:0 0 18px;color:var(--color-muted);}.hero-lede{max-width:680px;font-size:1.2rem;}.calculator-search{display:flex;width:min(100%,620px);min-height:58px;margin:26px 0 18px;border:1px solid var(--color-line);border-radius:var(--radius);background:var(--color-white);box-shadow:var(--shadow-soft);overflow:hidden;}.calculator-search input{flex:1;min-width:0;border:0;padding:0 18px;outline:none;}.calculator-search button,.button,.newsletter button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border:0;border-radius:var(--radius);background:var(--color-primary);color:var(--color-white);font-weight:800;text-decoration:none;cursor:pointer;}.calculator-search button{border-radius:0;min-width:112px;}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}.button-ghost{background:#e6f6fd;color:#075985;}.hero-panel{padding:18px;border:1px solid var(--color-line);border-radius:var(--radius);background:var(--color-white);box-shadow:var(--shadow-soft);}.section{padding:76px 0;}.section-soft{background:var(--color-soft);}.section-heading{max-width:760px;margin-bottom:28px;}.content-grid,.split-feature{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,0.76fr);gap:38px;align-items:start;}.table-card,.newsletter,.post-card,.guide-grid article,.insight-list div,.article-sidebar .widget{border:1px solid var(--color-line);border-radius:var(--radius);background:var(--color-white);box-shadow:0 10px 28px rgba(15,23,42,0.05);}.table-card{overflow:hidden;}table{width:100%;border-collapse:collapse;font-size:0.95rem;}caption{padding:14px 16px;text-align:left;font-weight:800;}th,td{padding:13px 16px;border-top:1px solid var(--color-line);text-align:left;}th{background:#eef7fc;color:#075985;}.insight-list{display:grid;gap:14px;}.insight-list div{padding:18px;}.insight-list strong{display:block;margin-bottom:4px;}.insight-list span{color:var(--color-muted);}.guide-grid,.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}.guide-grid article,.post-card{padding:22px;}.post-card a{color:inherit;text-decoration:none;}.faq-list details{border-top:1px solid var(--color-line);padding:16px 0;}.faq-list summary{color:var(--color-ink);font-weight:800;cursor:pointer;}.newsletter{padding:24px;}.newsletter label{display:block;margin-bottom:8px;font-weight:800;}.newsletter input{width:100%;min-height:48px;margin-bottom:12px;padding:0 14px;border:1px solid var(--color-line);border-radius:var(--radius);}.page-hero{padding:58px 0 48px;background:linear-gradient(180deg,#f7fbfe 0%,#ffffff 100%);border-bottom:1px solid var(--color-line);}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 318px;gap:42px;padding-top:50px;padding-bottom:70px;align-items:start;}.article-content{min-width:0;}.article-content>*{max-width:820px;}.article-content .alignwide,.article-content table,.article-content .bmi-calculator-wrap{max-width:100%;}.article-content h2{margin-top:40px;font-size:clamp(1.55rem,2.5vw,2.2rem);}.article-content h3{margin-top:28px;}.article-content ul,.article-content ol{color:var(--color-muted);}.article-sidebar{position:sticky;top:96px;display:grid;gap:18px;}.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;color:var(--color-muted);font-size:0.9rem;}.breadcrumb a{color:var(--color-secondary);}.ad-slot{display:flex;align-items:center;justify-content:center;min-height:96px;margin-block:24px;border:1px dashed #9ccce6;border-radius:var(--radius);background:#f2f9fd;color:#075985;}.ad-slot:empty::before{content:"Advertisement";}.adsterra-native-banner{min-height:96px;margin-block:24px;}.site-footer{padding:48px 0 26px;background:#0b1723;color:var(--color-white);}.footer-grid{display:grid;grid-template-columns:1.2fr 0.8fr 0.8fr;gap:34px;}.site-footer p,.site-footer a{color:#cbd5e1;}.footer-menu{display:grid;align-items:start;gap:10px;}.footer-menu a,.footer-meta a{display:block;text-decoration:none;}.copyright{margin-top:28px;padding-top:18px;border-top:1px solid rgba(255,255,255,0.14);}.copyright p{margin:0;font-size:0.9rem;}@media (max-width:900px){.nav-toggle{display:block;}.primary-nav{position:absolute;inset:74px 16px auto;display:none;padding:16px;border:1px solid var(--color-line);border-radius:var(--radius);background:var(--color-white);box-shadow:var(--shadow-soft);}.primary-nav.is-open{display:block;}.primary-nav .menu{display:grid;gap:12px;}.hero-grid,.content-grid,.split-feature,.article-layout,.footer-grid{grid-template-columns:1fr;}.hero-panel,.article-sidebar{position:static;}.guide-grid,.post-grid{grid-template-columns:1fr;}.section{padding:54px 0;}}@media (max-width:560px){.container{width:min(100% - 24px,var(--container));}.header-inner{min-height:66px;}.site-logo img{width:186px;}.hero{padding-top:42px;}.calculator-search{display:grid;}.calculator-search input{min-height:54px;}.calculator-search button{min-height:50px;}.hero-actions .button{width:100%;}th,td{padding:11px 12px;}}