:root{--ink:#202e2a;--muted:#6f7974;--green:#146b4a;--line:#e3e7e1;--paper:#fafbf8;--soft:#eef5ed;--white:#fff;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #8cc7aa;outline-offset:4px}button:disabled{cursor:default;opacity:.5}.skip{position:absolute;top:-100px;left:16px;background:#fff;padding:14px;z-index:20}.skip:focus{top:10px}.wrap{width:min(1160px,calc(100% - 64px));margin:auto}
.site-header{height:88px;border-bottom:1px solid var(--line);background:#fff}.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:10px;font-size:25px;letter-spacing:-1px;font-weight:760}.brand-mark{display:grid;place-items:center;background:var(--green);color:#fff;width:36px;height:36px;border-radius:10px;font-size:25px;transform:rotate(-6deg)}nav{display:flex;gap:28px;align-items:center;font-size:13px;font-weight:550}nav a{padding:10px 0}nav a:hover,nav a[aria-current=page]{color:var(--green)}.header-note{color:var(--muted);font-size:12px;display:flex;gap:7px;align-items:center}.status-dot{width:6px;height:6px;border-radius:50%;background:#57936c}
.ad{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;border:1px dashed #dce2d8;border-radius:7px;background:repeating-linear-gradient(135deg,#f5f7f2,#f5f7f2 6px,#f7f9f5 6px,#f7f9f5 12px);color:#a1a99c;text-align:center}.ad-label{font-size:9px;letter-spacing:2px;text-transform:uppercase}.ad-description{font-size:11px;color:#a4aaa0}.ad-top{height:100px;max-width:920px;margin:27px auto 32px}.page-intro{margin-bottom:27px}.eyebrow{font-size:11px;letter-spacing:1.8px;text-transform:uppercase;font-weight:700;color:var(--green);display:flex;gap:7px;align-items:center;margin:0 0 12px}h1{font-size:44px;letter-spacing:-1.7px;line-height:1.12;font-weight:680;margin:0 0 13px}.intro-copy{font-size:15px;color:var(--muted);margin:0;line-height:1.65}
.workspace{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:28px;align-items:start}.primary-column{min-width:0}.calculator-card{border:1px solid var(--line);border-radius:15px;background:#fff;overflow:hidden;box-shadow:0 4px 16px #26332204}.tool-tabs{display:flex;padding:0 25px;border-bottom:1px solid var(--line);gap:28px}.tool-tabs a{font-size:12px;padding:20px 0 17px;white-space:nowrap;color:var(--muted);border-bottom:3px solid transparent}.tool-tabs a[aria-current=page]{color:var(--green);font-weight:650;border-color:var(--green)}.calculator-interior{padding:25px}.mode-switch{display:inline-flex;background:#f1f4ef;padding:4px;border-radius:8px;margin-bottom:27px;gap:3px}.mode-switch button{border:0;color:var(--muted);background:transparent;padding:9px 15px;border-radius:5px;font-size:12px;font-weight:550}.mode-switch button[aria-pressed=true]{background:white;color:var(--ink);box-shadow:0 1px 4px #24352a12}.input-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}.field label{display:block;font-size:12px;font-weight:600;margin-bottom:9px}.input-shell{display:flex;align-items:center;border:1px solid #dfe4dc;border-radius:8px;background:#fdfefb;overflow:hidden}.input-shell:focus-within{border-color:var(--green);box-shadow:0 0 0 3px #146b4a12}.input-shell input{border:0;background:transparent;outline:0;width:100%;min-width:0;padding:15px 16px;font-size:25px;font-weight:550;color:var(--ink);font-variant-numeric:tabular-nums}.input-shell span{padding-right:16px;color:#8b938c;font-size:17px}.input-shell input::-webkit-inner-spin-button{appearance:none}.input-shell input{-moz-appearance:textfield}.form-error{color:#aa382f;font-size:12px;line-height:1.5;margin:9px 0 0;min-height:18px}.form-footer{display:flex;justify-content:space-between;align-items:center;margin-top:5px;font-size:11px;color:var(--muted)}.text-button{border:0;background:none;font-size:11px;color:var(--muted);padding:7px 0;display:inline-flex;align-items:center;gap:6px}.result-panel{background:#edf5e9;border:1px solid #e1ebdc;border-radius:10px;margin-top:19px;padding:22px 24px;position:relative;overflow:hidden}.result-kicker{font-size:10px;letter-spacing:1.5px;color:#628257;font-weight:650;margin:0 0 15px}.result-label{font-size:13px;margin:0 0 4px;color:#526b48}.result-value{font-size:62px;letter-spacing:-2.5px;line-height:1.15;color:#245333;font-weight:630;margin:0 0 14px;overflow-wrap:anywhere;font-variant-numeric:tabular-nums}.result-bottom{display:flex;justify-content:space-between;align-items:center;gap:10px}.result-formula{font-size:12px;color:#58764b;overflow-wrap:anywhere}.copy-button{border:1px solid #cfdeca;border-radius:6px;background:#f6faf3;color:#42613b;padding:7px 10px;font-size:10px;white-space:nowrap;display:flex;align-items:center;gap:6px}.copy-button svg{width:12px}.result-note{font-size:10px;color:#839079;margin:14px 0 0}.copy-status{font-size:11px;color:var(--green);position:absolute;right:24px;top:22px}.try-row{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin-top:20px;font-size:11px;color:var(--muted)}.example-chip{font-size:10px;color:#5c695d;border:1px solid #e2e7dd;background:#fff;border-radius:20px;padding:6px 10px}.example-chip:hover{border-color:#6e967a;background:#f5f8f2}.trust-row{display:flex;gap:22px;align-items:center;justify-content:center;color:#859080;font-size:10px;margin:15px 0 32px}.trust-row span{display:flex;align-items:center;gap:5px}.side-tip{border:1px solid var(--line);border-radius:11px;background:#f2f5ed;padding:23px;margin-bottom:22px}.tip-icon{font-size:21px;color:var(--green);margin-bottom:17px;display:block}.side-tip h2{font-size:14px;margin:0 0 10px}.side-tip p{font-size:12px;color:#74806f;line-height:1.8;margin:0}.side-tip strong{font-weight:600;color:#4c6346}.ad-side{height:360px}.section-head{display:flex;gap:12px;align-items:center;margin:0 0 20px}.section-number{color:#97a68d;font-size:10px;font-weight:600;padding:5px;border:1px solid #dce4d6;border-radius:5px}.content-section{padding:7px 0 28px}.content-section h2{font-size:23px;line-height:1.3;letter-spacing:-.6px;font-weight:650;margin:0}.content-section p{font-size:14px;line-height:1.85;color:#6d796d;margin:0 0 16px}.formula-box{border:1px solid var(--line);border-radius:9px;padding:18px 22px;background:white;margin:17px 0 22px}.formula-box span{font-size:9px;text-transform:uppercase;letter-spacing:1.4px;color:#8b9586;display:block;margin-bottom:8px}.formula-box code{font-size:14px;color:#395d35;white-space:normal}.steps{list-style:none;padding:0;margin:0;display:grid;gap:16px}.steps li{display:flex;gap:13px}.steps .step{width:23px;height:23px;flex:0 0 23px;border-radius:50%;background:#ebf1e4;display:grid;place-items:center;color:#6c825b;font-size:10px;margin-top:2px}.steps p{margin:0;font-size:12px}.steps strong{display:block;font-size:12px;color:#394a33;font-weight:600;margin-bottom:3px}.ad-inline{height:110px;margin:8px 0 34px}.examples-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.example-card{border:1px solid var(--line);background:white;border-radius:9px;padding:18px 15px;text-align:left}.example-card .example-icon{color:#6e8661;margin-bottom:18px;display:block;font-size:19px}.example-card h3{font-size:12px;margin:0 0 8px}.example-card p{font-size:11px;line-height:1.6;margin:0 0 16px}.example-card button{color:var(--green);border:0;background:none;font-size:10px;padding:0;text-align:left}.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:9px}table{border-collapse:collapse;width:100%;font-size:12px}th,td{text-align:left;padding:12px 18px;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}th{background:#f0f4eb;font-size:11px;color:#65765b;font-weight:600}tbody tr:last-child td{border:0}td:last-child{font-weight:600;color:var(--green)}details{border-bottom:1px solid var(--line);padding:18px 0}summary{font-size:13px;font-weight:550;list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:20px}summary::-webkit-details-marker{display:none}summary:after{content:'+';color:#7c9370;font-size:18px;font-weight:400}details[open] summary:after{content:'−'}details p{margin:12px 28px 0 0!important;font-size:12px!important}.related{padding:25px;border:1px solid var(--line);border-radius:11px;background:#fff}.related h2{font-size:16px;margin:0 0 18px}.related-links{display:grid;grid-template-columns:1fr 1fr;gap:12px}.related-links a{display:block;font-size:12px;color:var(--green);padding:14px;background:#f3f6ef;border-radius:6px}.ad-bottom{height:100px;max-width:920px;margin:40px auto}.site-footer{border-top:1px solid var(--line);padding:30px 0;background:#fff}.footer-top{display:flex;align-items:center;justify-content:space-between}.footer-top .brand{font-size:19px}.footer-top .brand-mark{width:27px;height:27px;font-size:20px;border-radius:7px}.footer-links{display:flex;gap:23px;font-size:11px;color:#7d8978}.footer-bottom{display:flex;justify-content:space-between;color:#9ba293;font-size:10px;margin-top:24px;line-height:1.8}.prose{max-width:740px;margin:50px auto 80px}.prose h1{font-size:36px}.prose h2{font-size:20px;margin-top:32px}.prose p,.prose li{color:#657160;font-size:14px;line-height:1.85}.prose a{text-decoration:underline;color:var(--green)}svg{vertical-align:middle}.noscript{margin:20px;padding:15px;background:#fff2d7;font-size:13px}
@media(min-width:1400px){.wrap{width:1160px}.page-intro{margin-top:38px}.calculator-interior{padding:28px}.ad-top{margin-bottom:37px}}
@media(max-width:1000px){.wrap{width:calc(100% - 40px)}.workspace{grid-template-columns:minmax(0,1fr) 230px;gap:20px}.header-note{display:none}.tool-tabs{gap:18px;padding:0 20px}.tool-tabs a{font-size:11px}.calculator-interior{padding:21px}.side-tip{padding:20px}.result-value{font-size:56px}}
@media(max-width:760px){.wrap{width:calc(100% - 32px)}.site-header{height:auto;min-height:75px}.header-inner{padding:17px 0;flex-wrap:wrap;gap:14px}.brand{font-size:23px}nav{gap:20px;font-size:11px}nav a{padding:3px 0}.ad-top{height:72px;margin:20px auto 25px}.ad-description{font-size:10px}h1{font-size:35px;letter-spacing:-1.2px}.intro-copy{font-size:13px;max-width:440px}.page-intro{margin-bottom:23px}.workspace{grid-template-columns:1fr}.sidebar{display:none}.calculator-interior{padding:20px}.tool-tabs{justify-content:space-between;gap:7px;padding:0 19px}.tool-tabs a{font-size:10px;padding:17px 0 14px}.mode-switch{display:flex;margin-bottom:23px}.mode-switch button{flex:1;padding:10px 7px;font-size:11px}.input-row{gap:12px}.input-shell input{font-size:23px;padding:14px 12px}.field label{font-size:11px}.result-panel{padding:21px;margin-top:16px}.result-value{font-size:57px}.result-formula{font-size:11px}.trust-row{gap:15px;font-size:9px;margin-bottom:30px}.content-section h2{font-size:21px}.content-section p{font-size:13px}.examples-grid{gap:8px}.example-card{padding:16px 11px}.example-card p{font-size:10px}.example-card h3{font-size:11px}.footer-top{align-items:flex-start;gap:20px}.footer-links{gap:14px;flex-wrap:wrap;justify-content:flex-end}.footer-bottom{gap:20px}.ad-bottom{margin:30px auto}.prose{margin:35px auto 60px}}
@media(max-width:400px){.header-inner{gap:14px}.header-inner nav{width:100%;justify-content:space-between}.input-shell input{font-size:21px}.tool-tabs{padding:0 13px}.calculator-interior{padding:17px}.result-panel{padding:18px}.result-bottom{align-items:flex-start}.examples-grid{grid-template-columns:1fr}.example-card .example-icon{margin-bottom:9px}.example-card p{font-size:12px}.related-links{grid-template-columns:1fr}.footer-bottom{flex-direction:column;gap:4px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important}}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}