:root{--ink:#15271f;--muted:#65736b;--green:#12372a;--lime:#c8f169;--paper:#f5f7f2;--line:#e0e7df;--white:#fff;--shadow:0 18px 50px rgba(22,50,36,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.55}
.site-header{max-width:1120px;margin:auto;padding:22px 24px;display:flex;align-items:center;justify-content:space-between}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--green);font-weight:850;font-size:1.25rem;text-decoration:none;letter-spacing:-.04em}.brand-mark{display:grid;place-items:center;background:var(--lime);width:34px;height:34px;border-radius:11px;font-weight:900}.header-note{font-size:.9rem;color:var(--muted)}
.container{max-width:1000px;padding:0 24px;margin:auto}.hero{padding:66px 0 42px;max-width:760px}.eyebrow{font-size:.72rem;letter-spacing:.15em;font-weight:850;color:#52705e;margin:0 0 12px}.hero h1{font-size:clamp(2.6rem,7vw,5rem);line-height:1.02;letter-spacing:-.065em;margin:0;color:var(--green)}.hero h1 span{color:#789b45}.hero-copy{font-size:1.08rem;max-width:610px;color:var(--muted);margin:22px 0 0}
.app-panel{background:var(--white);border:1px solid var(--line);border-radius:24px;padding:clamp(18px,4vw,34px);box-shadow:var(--shadow)}.tool-heading{display:flex;align-items:center;justify-content:space-between;gap:16px}.tool-heading h2,.guide h2,.faq h2{font-size:clamp(1.6rem,4vw,2.15rem);letter-spacing:-.045em;line-height:1.15;margin:0}.free-pill{background:#eef8dc;color:#466821;font-size:.7rem;font-weight:850;letter-spacing:.08em;border-radius:99px;padding:7px 12px}
.tabs{display:flex;gap:8px;overflow-x:auto;padding:22px 0 20px;border-bottom:1px solid var(--line)}.tab{white-space:nowrap;border:1px solid transparent;border-radius:10px;padding:10px 14px;background:#f3f5f0;color:#58675d;font:inherit;font-size:.9rem;font-weight:700;cursor:pointer}.tab.active{background:var(--green);color:white}.calculator{padding-top:24px}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.field{display:flex;flex-direction:column;gap:7px}.field label{font-size:.87rem;font-weight:750}.field input{width:100%;border:1px solid #d8e0d8;background:#fbfcfa;border-radius:11px;padding:13px 14px;color:var(--ink);font:inherit;outline:none}.field input:focus{border-color:#789b45;box-shadow:0 0 0 3px rgba(120,155,69,.15)}.field small{color:var(--muted);font-size:.77rem}
.result-card{margin-top:22px;border-radius:18px;background:var(--green);color:white;padding:24px;overflow:hidden}.result-label{margin:0;color:#c6d9c8;font-size:.9rem}.result-card output{display:block;font-size:clamp(2rem,6vw,3.2rem);font-weight:850;letter-spacing:-.05em;line-height:1.2;margin:7px 0}.result-note{color:#d3e0d4;margin:0;font-size:.9rem}.result-details{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.detail{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.12);border-radius:10px;padding:10px 12px;min-width:130px;flex:1}.detail span{display:block;color:#c6d9c8;font-size:.75rem}.detail strong{font-size:.98rem}.actions{display:flex;gap:10px;margin-top:16px}.button{border:0;border-radius:11px;padding:12px 18px;font:inherit;font-weight:800;cursor:pointer}.primary{background:var(--lime);color:var(--green)}.secondary{background:#edf1eb;color:var(--ink)}.button:hover,.tab:hover{filter:brightness(.97)}.fine-print{font-size:.78rem;color:var(--muted);margin:15px 0 0}
.guide{padding:80px 0 65px}.guide-intro{max-width:640px}.guide-intro>p:last-child{color:var(--muted);max-width:620px}.guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:25px}.guide-card{border:1px solid var(--line);border-radius:17px;padding:22px;background:rgba(255,255,255,.65)}.guide-card span{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--lime);font-size:.8rem;font-weight:900}.guide-card h3{margin:18px 0 6px}.guide-card p{margin:0;color:var(--muted);font-size:.91rem}
.faq{padding:0 0 80px}.faq details{border-bottom:1px solid var(--line);padding:18px 0}.faq summary{font-weight:800;cursor:pointer}.faq details p{color:var(--muted);max-width:720px}.site-footer{border-top:1px solid var(--line);padding:28px 24px 36px;text-align:center}.site-footer .brand{justify-content:center}.site-footer p{color:var(--muted);font-size:.88rem}.footer-small{font-size:.78rem!important}
@media(max-width:650px){.site-header{padding:16px 18px}.header-note{font-size:.78rem}.container{padding:0 16px}.hero{padding:48px 0 30px}.hero-copy{font-size:1rem}.fields{grid-template-columns:1fr}.guide-grid{grid-template-columns:1fr}.guide{padding:58px 0 48px}.faq{padding-bottom:55px}.tabs{margin-right:-4px}.app-panel{border-radius:18px}.result-card{padding:20px}.actions .button{flex:1}}

/* Footer navigation and supporting information pages */
.footer-links{display:flex;justify-content:center;flex-wrap:wrap;gap:10px 22px;margin:18px 0}
.footer-links a,.text-page a{color:#315d42;text-underline-offset:3px}
.footer-links a{font-size:.9rem;font-weight:700;text-decoration:none}
.footer-links a:hover{text-decoration:underline}
.text-page{max-width:820px;padding-top:42px;padding-bottom:76px}
.text-page h1{font-size:clamp(2.2rem,6vw,3.7rem);line-height:1.08;letter-spacing:-.055em;color:var(--green);margin:0 0 18px}
.text-page h2{font-size:1.35rem;line-height:1.25;letter-spacing:-.025em;margin:30px 0 8px;color:var(--green)}
.text-page p,.text-page li{color:#43564a}
.text-page .updated{font-size:.85rem;color:var(--muted)}
.text-page .content-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:clamp(18px,4vw,28px);margin-top:24px}
.text-page ul{padding-left:1.3rem}
@media(max-width:650px){.footer-links{gap:12px 16px}.text-page{padding-top:30px;padding-bottom:55px}}


/* SEO article pages and homepage guide links */
.article-hub{padding:0 0 72px}
.article-hub h2,.related-guides h2{font-size:clamp(1.6rem,4vw,2.15rem);line-height:1.15;letter-spacing:-.045em;margin:0;color:var(--green)}
.article-hub-copy{max-width:640px;color:var(--muted);margin:12px 0 22px}
.article-hub-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.article-hub-card,.related-card{display:flex;flex-direction:column;gap:9px;text-decoration:none;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;transition:transform .15s ease,border-color .15s ease}
.article-hub-card:hover,.related-card:hover{transform:translateY(-2px);border-color:#b4c9ad}
.article-hub-card strong,.related-card strong{font-size:1.08rem;line-height:1.35;color:var(--green)}
.article-hub-card>span:not(.related-label),.related-card>span:not(.related-label){font-size:.9rem;color:var(--muted)}
.related-label{font-size:.68rem;font-weight:850;letter-spacing:.1em;color:#52705e}
.article-link{font-size:.9rem;font-weight:800;color:#315d42!important;margin-top:3px}
.article-page{max-width:860px}
.breadcrumbs{display:flex;gap:9px;align-items:center;font-size:.86rem;color:var(--muted);margin-bottom:26px}
.breadcrumbs a{color:#315d42;text-underline-offset:3px}
.article-page h1{max-width:780px}
.article-lead{font-size:1.12rem;line-height:1.7;color:#43564a;max-width:760px}
.article-content h2{margin-top:32px}
.article-content h2:first-child{margin-top:0}
.article-content p,.article-content li{line-height:1.8}
.article-content li{margin:7px 0}
.formula-card{display:flex;flex-direction:column;gap:6px;background:#f1f6e9;border:1px solid #dce9cb;border-radius:12px;padding:16px 18px;margin:18px 0;color:var(--green)}
.formula-card span{font-size:.88rem;font-weight:500;color:#526750}
.article-table{width:100%;border-collapse:collapse;margin:18px 0}
.article-table th,.article-table td{padding:12px 10px;text-align:left;border-bottom:1px solid var(--line)}
.article-table th:last-child,.article-table td:last-child{text-align:right;white-space:nowrap}
.article-table thead th{background:#f4f7f1;color:var(--green)}
.related-guides{padding:34px 0 72px}
.related-guides h2{margin-bottom:18px}
.related-card{margin-top:12px}
@media(max-width:650px){.article-hub{padding-bottom:55px}.article-hub-grid{grid-template-columns:1fr}.article-page{padding-top:25px}.article-lead{font-size:1.02rem}.article-table th,.article-table td{padding:10px 7px;font-size:.9rem}.related-guides{padding-bottom:55px}}