:root{--brand: #1f8a5b;--brand-dark: #15613f;--brand-50: #eaf6f0;--brand-100: #d6ecdf;--ink: #14231c;--body: #3a463f;--muted: #6b766f;--bg: #ffffff;--bg-soft: #f5f8f6;--card: #ffffff;--line: #e4eae5;--amber: #e7920a;--radius: 16px;--radius-sm: 11px;--shadow-sm: 0 1px 2px rgba(20, 40, 30, .05);--shadow: 0 1px 2px rgba(20, 40, 30, .04), 0 10px 30px rgba(20, 50, 35, .07);--maxw: 1080px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{margin:0;font-family:var(--font);color:var(--body);background:var(--bg);line-height:1.6;font-size:17px;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{color:var(--ink);line-height:1.2;margin:0 0 .5em;font-weight:750;letter-spacing:-.01em}h1{font-size:clamp(1.9rem,4.5vw,2.7rem)}h2{font-size:clamp(1.4rem,3vw,1.9rem)}h3{font-size:1.15rem}p{margin:0 0 1rem}a{color:var(--brand-dark);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 8px;z-index:100}.skip-link:focus{left:0}:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:4px}.site-header{border-bottom:1px solid var(--line);background:#ffffffe6;backdrop-filter:saturate(180%) blur(8px);position:sticky;top:0;z-index:40}.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--ink)}.brand:hover{text-decoration:none}.brand-mark{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:10px;background:var(--brand);color:#fff;box-shadow:var(--shadow-sm)}.brand-text{font-size:1.15rem;letter-spacing:-.02em}.site-nav{display:flex;gap:22px}.site-nav a{color:var(--body);font-weight:600;font-size:.98rem}.site-nav a:hover{color:var(--brand-dark);text-decoration:none}.hero{background:linear-gradient(180deg,var(--brand-50),var(--bg) 70%);padding:56px 0 40px;border-bottom:1px solid var(--line)}.hero h1{max-width:16ch}.hero .lead{font-size:clamp(1.05rem,2.3vw,1.25rem);color:var(--body);max-width:56ch;margin:0 auto}.hero-center{text-align:center}.hero-center .lead{margin-inline:auto}.eyebrow{display:inline-block;font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand-dark);background:var(--brand-100);padding:5px 12px;border-radius:999px;margin-bottom:16px}.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;padding:12px 20px;border-radius:999px;border:1px solid transparent;cursor:pointer;font-size:1rem}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-dark);text-decoration:none}.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}.btn-ghost:hover{border-color:var(--brand);text-decoration:none}section{padding:44px 0}.section-head{margin-bottom:26px}.section-head h2{margin-bottom:6px}.section-head p{color:var(--muted);margin:0}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}.calc-card{display:flex;flex-direction:column;gap:8px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);transition:transform .12s ease,box-shadow .12s ease,border-color .12s ease}.calc-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--brand-100);text-decoration:none}.calc-card .icon{font-size:1.8rem;line-height:1}.calc-card h3{margin:4px 0 0;color:var(--ink)}.calc-card p{margin:0;color:var(--muted);font-size:.95rem}.calc-card .go{margin-top:auto;padding-top:10px;color:var(--brand-dark);font-weight:700;font-size:.92rem}.cat-block{margin-bottom:40px}.cat-block:last-child{margin-bottom:0}.cat-block>h2{margin-bottom:2px}.cat-block>.cat-blurb{color:var(--muted);margin:0 0 20px}.breadcrumb{font-size:.88rem;color:var(--muted);padding:18px 0 0}.breadcrumb a{color:var(--muted)}.breadcrumb a:hover{color:var(--brand-dark)}.breadcrumb span{margin:0 6px}.calc-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:36px;align-items:start;padding:28px 0 10px}.calc-head h1{margin-bottom:8px}.calc-head .subtitle{font-size:1.12rem;color:var(--body);max-width:60ch;margin-bottom:4px}.calc-updated{font-size:.82rem;color:var(--muted)}.calc-card-tool{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin:22px 0 12px}.unit-toggle{display:inline-flex;background:var(--bg-soft);border:1px solid var(--line);border-radius:999px;padding:4px;margin-bottom:20px}.unit-toggle button{border:none;background:transparent;padding:8px 16px;border-radius:999px;font-weight:600;font-size:.9rem;color:var(--muted);cursor:pointer}.unit-toggle button.active{background:#fff;color:var(--ink);box-shadow:var(--shadow-sm)}.field-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.field{display:flex;flex-direction:column}.field--full{grid-column:1 / -1}.field label{font-weight:650;color:var(--ink);font-size:.92rem;margin-bottom:6px;display:flex;justify-content:space-between;gap:8px}.field-unit{color:var(--muted);font-weight:500}.field input,.field select{font:inherit;font-size:1rem;padding:11px 13px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;color:var(--ink);width:100%}.field input:focus,.field select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-100)}.field-help{font-size:.8rem;color:var(--muted);margin:6px 0 0}.result-empty{color:var(--muted);padding:20px;text-align:center;background:var(--bg-soft);border-radius:var(--radius-sm)}.result-warn{background:#fff7e8;border:1px solid #f3dca5;color:#8a5a00;padding:12px 14px;border-radius:var(--radius-sm);margin-bottom:16px;font-size:.92rem}.result-hero{background:var(--brand-50);border:1px solid var(--brand-100);border-radius:var(--radius);padding:22px;text-align:center;margin-bottom:18px}.result-hero-label{display:block;font-size:.85rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--brand-dark)}.result-hero-value{font-size:clamp(2.4rem,7vw,3.4rem);font-weight:820;color:var(--ink);line-height:1.05;margin:4px 0}.result-hero-unit{font-size:.4em;font-weight:650;color:var(--muted)}.result-hero-hint{margin:2px 0 0;color:var(--body);font-size:.95rem}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin-bottom:18px}.stat{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 14px}.stat-label{display:block;font-size:.78rem;color:var(--muted);margin-bottom:2px}.stat-value{font-weight:750;color:var(--ink)}.buy{border-top:1px dashed var(--line);padding-top:16px}.buy-title{font-size:.95rem;margin-bottom:8px}.buy-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.buy-list li{font-size:.95rem}.buy-link{font-weight:650}.buy-note{color:var(--muted)}.buy-disclosure{font-size:.78rem;color:var(--muted);margin:10px 0 0}.result-notes{margin:16px 0 0;padding-left:18px;color:var(--muted);font-size:.9rem}.result-notes li{margin-bottom:4px}.prose{max-width:70ch}.prose h2{margin-top:36px}.prose ol,.prose ul{padding-left:22px}.prose li{margin-bottom:8px}.steps{counter-reset:step;list-style:none;padding:0}.steps li{counter-increment:step;position:relative;padding-left:44px;margin-bottom:14px}.steps li:before{content:counter(step);position:absolute;left:0;top:-2px;width:30px;height:30px;background:var(--brand-50);color:var(--brand-dark);border-radius:50%;display:grid;place-items:center;font-weight:800;font-size:.9rem}.faq details{border:1px solid var(--line);border-radius:var(--radius-sm);padding:0;margin-bottom:10px;background:#fff;overflow:hidden}.faq summary{cursor:pointer;font-weight:700;color:var(--ink);padding:16px 18px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";font-weight:700;color:var(--brand);font-size:1.3rem;line-height:1}.faq details[open] summary:after{content:"–"}.faq details[open] summary{border-bottom:1px solid var(--line)}.faq .faq-a{padding:14px 18px;color:var(--body)}.faq .faq-a p{margin:0}.sidebar .side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:18px;box-shadow:var(--shadow-sm)}.sidebar h2{font-size:1.05rem}.side-links{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:2px}.side-links a{display:flex;align-items:center;gap:10px;padding:9px 8px;border-radius:9px;color:var(--ink);font-weight:600;font-size:.95rem}.side-links a:hover{background:var(--bg-soft);text-decoration:none}.side-links .icon{font-size:1.15rem}.ad-slot{background:repeating-linear-gradient(45deg,#fafbfa,#fafbfa 10px,#f3f5f3 10px 20px);border:1px dashed var(--line);border-radius:var(--radius-sm);min-height:250px;display:grid;place-items:center;color:var(--muted);font-size:.8rem;text-align:center}.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);margin-top:56px;padding:44px 0 0}.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:32px}.footer-brand p{color:var(--muted);font-size:.95rem;max-width:38ch;margin-top:8px}.footer-col h2{font-size:.95rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}.footer-col ul{list-style:none;padding:0;margin:0}.footer-col li{margin-bottom:8px}.footer-col a{color:var(--body);font-size:.95rem}.footer-bottom{border-top:1px solid var(--line);margin-top:32px;padding:18px 0}.footer-bottom p{color:var(--muted);font-size:.85rem;margin:0}@media (max-width: 880px){.calc-layout{grid-template-columns:1fr}.sidebar{order:3}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1 / -1}}@media (max-width: 560px){body{font-size:16px}.field-grid{grid-template-columns:1fr}.site-nav{gap:16px}.hero{padding:40px 0 30px}section{padding:34px 0}.footer-grid{grid-template-columns:1fr;gap:24px}}@media (prefers-reduced-motion: reduce){*{scroll-behavior:auto;transition:none!important}}