:root{--ink:#192837;--deep:#112132;--green:#395877;--mint:#eaeef3;--muted:#456a8f;--line:#dae0e6}*{box-sizing:border-box}body{margin:0;background:#f7f9fb;color:var(--ink);font:16px Arial,sans-serif}header,main,footer{max-width:1140px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}header strong{letter-spacing:.07em}small,.note{color:var(--muted);line-height:1.6}.badge{font-size:12px;background:#e4e9ed;padding:9px 13px;border-radius:30px}.eyebrow{color:var(--green);font-size:12px;letter-spacing:.15em;font-weight:bold}h1{font:normal clamp(36px,5vw,58px)/1.08 Georgia,serif;max-width:760px;margin:18px 0}h1 em{color:var(--green);font-style:normal}.intro{max-width:680px;line-height:1.7;color:var(--muted)}.layout{display:grid;grid-template-columns:1.1fr 1fr;gap:28px;margin-top:32px}.card{background:white;border:1px solid var(--line);border-radius:20px;padding:26px}h2{font-size:20px;margin:0 0 20px}h3{font-size:16px}.fields{display:grid;grid-template-columns:1fr 1fr;gap:18px}label{font-size:13px;font-weight:bold;display:block}input{display:block;width:100%;font:18px Arial;padding:13px 12px;border:1px solid #abb8c5;border-radius:8px;margin-top:8px;background:#ffffff;color:var(--ink)}input:focus,button:focus-visible,a:focus-visible{outline:3px solid #90a3b6;outline-offset:3px}button{cursor:pointer;font:inherit;border-radius:9px;padding:13px 16px;border:1px solid var(--line);background:white;color:var(--ink)}.modes{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:24px}.modes button[aria-pressed=true]{background:var(--deep);color:white}.primary{background:var(--deep);color:white;width:100%;margin-top:20px}.demo{font-size:13px;margin-top:12px}.result{background:var(--deep);color:#ffffff}.result .note{color:#c5ced7}.big{font:44px Georgia,serif;margin:12px 0}.empty{padding:35px 0;line-height:1.8;color:#cad2db}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px}.metric{background:#ffffff0c;border:1px solid #ffffff20;border-radius:12px;padding:16px}.metric strong{display:block;margin-top:10px;font-size:21px}.metric span{font-size:12px;color:#cbd3db}table{width:100%;border-collapse:collapse;margin-top:22px;font-size:13px}td,th{text-align:right;padding:12px 4px;border-bottom:1px solid #ffffff25}td:first-child,th:first-child{text-align:left}details{margin-top:24px;border-top:1px solid var(--line);padding-top:18px;line-height:1.7;font-size:14px}summary{cursor:pointer;font-weight:bold}.warning{color:#a2f6e4}#error{color:#2da58b;line-height:1.5}a{color:inherit}footer{font-size:13px;line-height:1.8}footer a{margin-right:16px}.contact{margin-top:28px;padding:24px;background:var(--mint);border-radius:16px;display:flex;justify-content:space-between;align-items:center;gap:18px}.contact a{font-weight:bold}.hidden{display:none}@media(max-width:760px){.layout{grid-template-columns:1fr}header,main,footer{padding:18px}.card{padding:20px}.contact{display:block}.contact a{display:inline-block;margin-top:12px}header strong{font-size:13px}.badge{font-size:10px}.fields{gap:14px}h1{font-size:38px}}

.site-brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}.site-brand strong{display:block;font-size:18px;letter-spacing:0}.site-brand small{display:block;font-size:10px;letter-spacing:.13em;margin-top:3px}.site-monogram{display:grid;place-items:center;background:var(--deep);color:#ffffff;width:44px;height:44px;border-radius:10px;font:bold 21px Georgia,serif}.site-links{display:flex;align-items:center;justify-content:flex-end;gap:22px;flex-wrap:wrap}.site-links a{font-size:14px;font-weight:bold;text-underline-offset:4px;padding:10px 0}.footer-links{display:flex;gap:12px 24px;flex-wrap:wrap;margin-top:18px}.footer-links a{margin:0;padding:8px 0}header{gap:18px}@media(max-width:760px){header{align-items:flex-start;flex-direction:column}.site-brand strong{font-size:18px}.site-links{justify-content:flex-start;gap:12px 20px;width:100%}.site-links a{font-size:13px}.site-monogram{width:40px;height:40px}}

/* Explicit home navigation shared by both calculators. */
.site-links .home-button{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:13px 20px;background:var(--deep);color:#ffffff;border:1px solid var(--deep);border-radius:10px;text-decoration:none;white-space:nowrap;line-height:1.3}.site-links .home-button:hover{background:#1a594b;border-color:#1a594b}.home-button svg{flex-shrink:0}.site-brand{cursor:pointer}.site-brand:hover strong{text-decoration:underline;text-underline-offset:4px}nav.modes>a{display:block;padding:14px;background:var(--mint);border-radius:8px;text-decoration:none}nav.modes>a:hover{text-decoration:underline}
@media(max-width:480px){.site-links .home-button{width:100%;font-size:15px}.site-links{gap:6px 24px}.fields,.metrics{grid-template-columns:1fr}table{font-size:12px}td,th{overflow-wrap:anywhere}.big{font-size:32px}}