:root{--ink:#172a35;--muted:#65747c;--line:#e4eae6;--paper:#f5f8f5;--white:#fff;--green:#176b54;--green2:#e5f3ec;--mint:#b9e3cf;--orange:#ec8b59;--blue:#dcebf1;--shadow:0 16px 42px rgba(26,54,46,.08);--radius:20px;--max:1180px}*{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,"Segoe UI",sans-serif;font-size:16px;line-height:1.6}a{color:inherit;text-decoration:none}a:hover{color:var(--green)}button,input,select{font:inherit}.container{width:min(var(--max),calc(100% - 40px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.header-inner{height:76px;display:flex;align-items:center;gap:32px}.brand{display:flex;align-items:center;gap:10px;font-size:23px;font-weight:850;letter-spacing:-1.2px;white-space:nowrap}.brand-mark{width:36px;height:36px;border-radius:12px;background:var(--green);display:grid;place-items:center;color:#fff;font-size:22px;line-height:1}.brand span:last-child{color:var(--green)}.main-nav{display:flex;align-items:center;gap:25px;margin-left:auto}.main-nav a{font-size:14px;font-weight:650;color:#53636a}.main-nav a:hover,.main-nav a[aria-current=page]{color:var(--green)}.header-actions{display:flex;align-items:center;gap:10px}.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;width:42px;height:42px;color:var(--ink);font-size:21px}.button{display:inline-flex;justify-content:center;align-items:center;gap:8px;padding:12px 18px;border-radius:12px;border:1px solid transparent;background:var(--green);color:#fff;font-weight:750;font-size:14px;cursor:pointer;transition:transform .18s,background .18s}.button:hover{background:#0e5945;color:#fff;transform:translateY(-1px)}.button-secondary{background:#fff;color:var(--ink);border-color:var(--line)}.button-secondary:hover{background:var(--green2);color:var(--green);border-color:#cce4d8}.hero{padding:70px 0 58px;background:linear-gradient(120deg,#143d35 0%,#1c5948 62%,#286c56 100%);color:#fff;overflow:hidden;position:relative}.hero:after{content:"";position:absolute;width:540px;height:540px;border:1px solid rgba(255,255,255,.12);border-radius:50%;right:-150px;top:-280px;box-shadow:0 0 0 45px rgba(255,255,255,.035),0 0 0 95px rgba(255,255,255,.025)}.hero-inner{position:relative;z-index:1;max-width:780px}.eyebrow{text-transform:uppercase;letter-spacing:1.8px;font-size:11px;font-weight:800;color:#bfe5d3;margin-bottom:16px}.hero h1{font-size:clamp(37px,5vw,58px);line-height:1.08;letter-spacing:-2px;margin:0 0 18px;max-width:720px}.hero p{font-size:18px;line-height:1.65;color:#d7e9e1;max-width:650px;margin:0 0 28px}.search-box{display:flex;align-items:center;gap:12px;max-width:650px;background:#fff;border-radius:16px;padding:8px 10px 8px 18px;box-shadow:0 14px 34px rgba(0,0,0,.15)}.search-icon{font-size:20px;color:#7a8987}.search-box input{border:0;outline:0;min-width:0;flex:1;color:var(--ink);font-size:15px;padding:8px 0;background:transparent}.search-box .button{padding:12px 18px}.hero-meta{display:flex;flex-wrap:wrap;gap:20px;margin-top:21px;color:#c9e1d6;font-size:13px}.hero-meta span{display:inline-flex;gap:7px;align-items:center}.section{padding:52px 0}.section-tight{padding:34px 0}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:22px}.section-heading h2{font-size:27px;letter-spacing:-.8px;margin:0;line-height:1.2}.section-heading p{margin:7px 0 0;color:var(--muted);font-size:14px}.text-link{font-weight:750;color:var(--green);font-size:14px;white-space:nowrap}.category-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.category-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;min-height:152px;transition:transform .18s,box-shadow .18s,border-color .18s}.category-card:hover,.calculator-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c5dfd1}.category-icon{display:grid;place-items:center;width:40px;height:40px;border-radius:13px;background:var(--green2);color:var(--green);font-size:21px;font-weight:750;margin-bottom:13px}.category-card h3{margin:0 0 5px;font-size:16px;letter-spacing:-.2px}.category-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.5}.category-card small{display:block;margin-top:12px;color:var(--green);font-weight:750;font-size:12px}.calculator-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}.calculator-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:17px 18px;display:flex;flex-direction:column;min-height:135px;transition:transform .18s,box-shadow .18s,border-color .18s}.calculator-card .card-category{color:var(--green);font-size:11px;letter-spacing:.5px;text-transform:uppercase;font-weight:850;margin-bottom:7px}.calculator-card h3{font-size:16px;line-height:1.35;margin:0 0 7px;letter-spacing:-.3px}.calculator-card p{font-size:13px;color:var(--muted);line-height:1.45;margin:0}.calculator-card .card-arrow{margin-top:auto;padding-top:13px;color:var(--green);font-size:12px;font-weight:800}.calculator-card[hidden]{display:none}.empty-state{padding:24px;border:1px dashed #cbd8d0;border-radius:16px;color:var(--muted);text-align:center;background:#fff}.soft-panel{background:#eaf3ed;border:1px solid #dbe9df;border-radius:22px;padding:28px}.soft-panel h2{margin:0 0 7px;font-size:23px}.soft-panel p{margin:0;color:#596e65;max-width:760px}.page-intro{padding:35px 0 12px}.breadcrumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;color:#82908c;font-size:12px;margin-bottom:18px}.breadcrumbs a{color:var(--green);font-weight:650}.breadcrumbs .sep{color:#b5c0ba}.page-intro h1{font-size:clamp(30px,4vw,43px);line-height:1.15;letter-spacing:-1.3px;margin:0 0 12px;max-width:850px}.page-intro p{color:var(--muted);max-width:820px;font-size:16px;margin:0}.calculator-layout{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr);gap:18px;align-items:start;padding:22px 0 35px}.calculator-panel,.result-panel,.content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 26px rgba(27,59,48,.035)}.calculator-panel{padding:25px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:20px}.panel-head h2{font-size:19px;margin:0;letter-spacing:-.4px}.badge-soft{border-radius:99px;background:var(--green2);color:var(--green);padding:6px 10px;font-size:11px;font-weight:800;white-space:nowrap}.fields-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.field{min-width:0}.field.full{grid-column:1/-1}.field label{display:block;font-size:13px;font-weight:750;margin-bottom:7px;color:#364a4e}.input-wrap{position:relative}.field input,.field select{display:block;width:100%;height:48px;border:1px solid #dbe4de;border-radius:11px;background:#fbfdfb;color:var(--ink);padding:0 13px;outline:0;transition:border-color .15s,box-shadow .15s}.field input:focus,.field select:focus{border-color:#5c9c81;box-shadow:0 0 0 3px rgba(23,107,84,.1)}.field input::placeholder{color:#a0aba6}.field-hint{font-size:11px;color:#82908a;margin-top:5px}.form-actions{display:flex;gap:10px;align-items:center;margin-top:21px}.form-actions .button{min-width:145px}.form-actions span{color:#85918c;font-size:11px}.result-panel{padding:25px;position:sticky;top:98px;min-height:280px}.result-panel h2{font-size:19px;margin:0 0 17px}.result-empty{border:1px dashed #cbd8d0;background:#f8fbf8;border-radius:16px;padding:28px 18px;text-align:center;color:#7b8983}.result-empty .result-symbol{margin:auto auto 12px;width:42px;height:42px;border-radius:50%;background:var(--green2);color:var(--green);display:grid;place-items:center;font-size:23px}.result-top{background:#eaf5ee;border-radius:16px;padding:20px;margin-bottom:14px}.result-kicker{text-transform:uppercase;letter-spacing:1.1px;font-size:10px;color:var(--green);font-weight:850}.result-label{font-size:13px;color:#53675e;margin-top:8px}.result-value{font-weight:850;font-size:clamp(26px,3vw,36px);color:#15543f;letter-spacing:-1px;line-height:1.2;margin-top:2px;overflow-wrap:anywhere}.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.result-item{border:1px solid var(--line);border-radius:12px;padding:12px;min-width:0}.result-item span{display:block;font-size:11px;color:var(--muted);line-height:1.35}.result-item strong{display:block;margin-top:4px;font-size:15px;overflow-wrap:anywhere}.result-item small{display:block;color:#89958f;font-size:10px}.result-note{font-size:12px;line-height:1.5;color:#66756d;margin:14px 0 0}.result-formula{border-top:1px solid var(--line);margin-top:14px;padding-top:13px}.result-formula span{color:var(--green);font-size:11px;font-weight:850;text-transform:uppercase;letter-spacing:.8px}.result-formula p{margin:5px 0 0;color:#5e6f67;font-size:12px}.result-error{background:#fff4ed;border:1px solid #f6d6c3;border-radius:14px;padding:17px;color:#8a4827}.result-error strong{font-size:14px}.result-error p{font-size:13px;margin:5px 0 0}.result-panel.has-error .result-top{display:none}.info-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.content-card{padding:25px}.content-card h2{margin:0 0 13px;font-size:21px;letter-spacing:-.5px}.content-card h3{font-size:16px;margin:18px 0 7px}.content-card p{color:#596b65;margin:0 0 12px;font-size:14px}.content-card ol,.content-card ul{padding-left:19px;margin:0;color:#596b65;font-size:14px}.content-card li{padding:5px 0}.formula-box{background:#f3f8f4;padding:15px 16px;border-radius:12px;color:#245a45;font-weight:700;font-size:14px}.faq-list{display:grid;gap:9px}.faq-item{border:1px solid var(--line);border-radius:13px;padding:15px 17px;background:#fff}.faq-item h3{font-size:15px;margin:0 0 6px}.faq-item p{font-size:13px;color:var(--muted);margin:0}.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.related-link{border:1px solid var(--line);background:#fff;border-radius:13px;padding:13px;font-size:13px;font-weight:750}.related-link span{display:block;font-size:10px;color:var(--green);font-weight:800;margin-bottom:3px}.category-hero{padding:46px 0 32px;background:#eaf3ed;border-bottom:1px solid #dce9df}.category-hero h1{font-size:clamp(32px,4vw,43px);letter-spacing:-1.2px;margin:0 0 11px}.category-hero p{margin:0;color:#5d7167;max-width:720px}.category-stat{display:inline-flex;align-items:center;gap:8px;margin-top:18px;color:var(--green);font-size:13px;font-weight:800}.article-copy{max-width:820px;color:#596b65;font-size:14px}.article-copy h2{color:var(--ink);font-size:21px;letter-spacing:-.4px;margin:25px 0 8px}.article-copy p{margin:0 0 13px}.article-copy ul{padding-left:19px}.site-footer{margin-top:55px;background:#132f2b;color:#d5e4dc;padding:45px 0 22px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:35px}.footer-brand{font-size:23px;font-weight:850;letter-spacing:-1px;color:#fff}.footer-brand span{color:#9bd7ba}.footer-about{color:#a9c0b5;font-size:13px;max-width:280px;margin-top:12px}.footer-col h3{font-size:12px;letter-spacing:.8px;text-transform:uppercase;color:#9bd7ba;margin:4px 0 13px}.footer-col a{display:block;color:#d5e4dc;font-size:13px;margin:7px 0}.footer-bottom{border-top:1px solid rgba(255,255,255,.13);margin-top:34px;padding-top:18px;display:flex;justify-content:space-between;gap:18px;color:#91aaa0;font-size:11px}.about-hero{padding:48px 0 34px}.about-hero h1{font-size:42px;letter-spacing:-1.3px;margin:0 0 12px}.about-hero p{font-size:17px;color:var(--muted);max-width:740px}.not-found{padding:90px 0;text-align:center}.not-found h1{font-size:48px;margin:0}.muted{color:var(--muted)}.article-note{background:#fbf4ea;border:1px solid #f0e4d2;padding:15px 17px;border-radius:13px;font-size:13px;color:#765d3d;margin-top:16px}.skip-link{position:absolute;left:-999px;top:4px;background:#fff;padding:10px}.skip-link:focus{left:10px;z-index:50}.hidden{display:none!important}
@media(max-width:920px){.main-nav{gap:16px}.header-inner{gap:18px}.calculator-layout{grid-template-columns:1fr 1fr}.category-grid{grid-template-columns:repeat(2,1fr)}.calculator-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.container{width:min(var(--max),calc(100% - 28px))}.header-inner{height:66px}.brand{font-size:21px}.menu-toggle{display:block;margin-left:auto}.main-nav{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:12px 20px 18px;flex-direction:column;align-items:stretch;gap:0}.main-nav.is-open{display:flex}.main-nav a{padding:11px 4px;border-bottom:1px solid #f0f3f1}.header-actions{display:none}.hero{padding:52px 0 43px}.hero h1{font-size:39px;letter-spacing:-1.4px}.hero p{font-size:15px}.search-box{padding:7px 8px 7px 13px}.search-box .button{padding:11px 13px;font-size:12px}.hero-meta{gap:10px 16px}.section{padding:37px 0}.section-heading{align-items:start;flex-direction:column;gap:10px}.section-heading h2{font-size:23px}.category-grid{gap:10px}.category-card{padding:15px;min-height:142px}.calculator-grid{grid-template-columns:1fr;gap:9px}.calculator-card{min-height:unset;padding:15px}.page-intro{padding:25px 0 8px}.page-intro h1{font-size:31px}.page-intro p{font-size:14px}.calculator-layout{grid-template-columns:1fr;padding-top:14px;gap:12px}.calculator-panel,.result-panel,.content-card{padding:18px;border-radius:16px}.result-panel{position:static;min-height:unset}.fields-grid{grid-template-columns:1fr;gap:12px}.field.full{grid-column:auto}.form-actions{flex-wrap:wrap}.form-actions .button{flex:1}.info-grid{grid-template-columns:1fr;gap:12px}.related-grid{grid-template-columns:repeat(2,1fr)}.category-hero{padding:32px 0 25px}.category-hero h1{font-size:32px}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-grid>div:first-child{grid-column:1/-1}.footer-bottom{flex-direction:column;gap:5px}.about-hero h1{font-size:34px}}