:root{--blue:#5665a8;--soft:#eef0f8;--ink:#111;--radius:5mm}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font:18px/1.6 Ubuntu,Arial,sans-serif}a{color:#465593;text-underline-offset:.18em}.skip-link{position:fixed;z-index:100;top:-80px;left:1rem;padding:.75rem 1rem;background:#fff;color:#000}.skip-link:focus{top:1rem}.breadcrumbs,.access-hero,.jump-nav,.content{width:min(calc(100% - 10vw),1200px);margin-inline:auto}.breadcrumbs{display:flex;gap:.6rem;padding:2rem 0}.access-hero{padding:clamp(2rem,6vw,5rem);border-radius:var(--radius);background:var(--blue);color:#fff}.eyebrow{font-weight:700;text-transform:uppercase;letter-spacing:.12em}.access-hero h1{max-width:950px;margin:.4rem 0;font-size:clamp(2.5rem,6vw,5rem);line-height:1}.lead{font-size:clamp(1.15rem,2vw,1.5rem)}.actions{display:flex;gap:1rem;flex-wrap:wrap;margin-top:2rem}.actions a,.cta,.calculator button{display:inline-flex;min-height:48px;align-items:center;padding:.8rem 1.1rem;border:2px solid #fff;border-radius:12px;background:#fff;color:#111;font-weight:700;text-decoration:none}.actions .secondary{background:transparent;color:#fff}.jump-nav{display:flex;gap:.6rem;flex-wrap:wrap;padding:1.5rem 0}.jump-nav a{min-height:44px;padding:.55rem .8rem;border-radius:10px;background:var(--soft)}.content{max-width:900px}.content section{padding:clamp(2rem,5vw,4rem) 0;border-bottom:1px solid #ccd0df}.content h2{font-size:clamp(1.9rem,4vw,3.2rem);line-height:1.1}.content h3{margin-top:2rem}.formula,.calculator,.contact{padding:clamp(1.2rem,3vw,2rem);border-radius:var(--radius);background:var(--soft)}.table-scroll{overflow-x:auto}.table-scroll:focus-visible{outline:3px solid var(--blue)}table{width:100%;border-collapse:collapse}caption{text-align:left;font-weight:700;margin-bottom:.5rem}th,td{padding:.8rem;border:1px solid #aeb4c8;text-align:left}th{background:#dce1f1}.calculator{margin-top:2rem}.calculator label{display:block;font-weight:700}.calculator input{width:min(100%,320px);min-height:48px;margin:.4rem 0;padding:.7rem;border:1px solid #697195;border-radius:8px;font:inherit}.calculator button{border-color:var(--blue);background:var(--blue);color:#fff}.error{min-height:1.6em;color:#8a1616;font-weight:700}.result{margin-top:1rem;padding:1rem;background:#fff;border-radius:10px}.content details{padding:1rem 0;border-top:1px solid #aeb4c8}.content summary{min-height:44px;cursor:pointer;font-weight:700}.contact .cta{border-color:var(--blue);background:var(--blue);color:#fff}.contact address{margin-top:1.5rem;font-style:normal}.sources{font-size:.94rem}.site-footer{margin-top:4rem;padding:3rem 5vw;background:#101116;color:#fff}.site-footer-grid{display:grid;grid-template-columns:2fr 1fr;gap:2rem;max-width:1200px;margin:auto}.site-footer a{color:#fff}.site-footer-nav{display:flex;flex-wrap:wrap;gap:1rem}.site-footer-domain{font-size:1.5rem;font-weight:700}@media(max-width:700px){.breadcrumbs,.access-hero,.jump-nav,.content{width:calc(100% - 24px)}.site-footer-grid{grid-template-columns:1fr}.access-hero{padding:1.5rem}.actions{flex-direction:column}.actions a{justify-content:center}}*:focus-visible{outline:3px solid #79c8ff;outline-offset:3px}