:root{--ink:#17345b;--muted:#506987;--blue:#1555e8;--line:#c8dff0;--ice:#ecf8ff;--yellow:#ffe479;--green:#dff5eb;color-scheme:light;scroll-behavior:smooth}
*{box-sizing:border-box}
body{margin:0;background:#fbfdff;color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:16px;line-height:1.6}
a{color:#174cb5;text-underline-offset:3px}
button,input,summary{font:inherit}
button,a,input,summary{touch-action:manipulation}
button,summary{cursor:pointer}
button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #1555e8;outline-offset:4px}
.wrap{width:min(1120px,calc(100% - 40px));margin-inline:auto}
.skip{position:absolute;top:-80px;left:20px;z-index:5;background:#fff;padding:12px}
.skip:focus{top:8px}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:82px;border-bottom:1px solid var(--line)}
.wordmark{font-size:1.65rem;font-weight:850;letter-spacing:-1px;text-decoration:none;color:var(--ink)}
.wordmark span{color:var(--blue)}
.site-header nav{display:flex;flex-wrap:wrap;gap:10px 20px}
.site-header nav a{font-size:.9rem;font-weight:700;text-decoration:none;min-height:44px;display:inline-flex;align-items:center}
.hero{padding-block:28px 30px;max-width:820px}
.crumbs{font-size:.82rem;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.crumbs a{color:var(--muted)}
.eyebrow{display:inline-block;background:#fff1b7;border:1px solid #e6d28b;color:#68521c;border-radius:99px;padding:5px 11px;font-size:.75rem;letter-spacing:.8px;font-weight:800;margin:0 0 14px}
h1,h2,h3,h4{line-height:1.18;letter-spacing:-.035em;overflow-wrap:anywhere}
h1{font-size:clamp(2.25rem,5vw,3.45rem);margin:0 0 14px;max-width:850px}
h2{font-size:clamp(1.5rem,3vw,2rem);margin:0 0 14px}
h3{font-size:1.2rem;margin:0 0 10px}
p{margin:0 0 14px}
.intro{font-size:1.1rem;color:var(--muted);max-width:690px;margin-bottom:0}
.calculator{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);border:1px solid #bed9ee;border-radius:24px;overflow:hidden;background:#fff;box-shadow:0 9px 0 #d9eefa66;scroll-margin-top:20px}
.tool-form{padding:30px;min-width:0}
.tool-form h2{font-size:1.35rem}
.form-heading{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:20px}
.form-heading h2{margin:0}
.form-heading span{font-size:.75rem;color:var(--muted)}
.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 16px}
label{display:block;font-size:.88rem;font-weight:650;line-height:1.45;min-width:0}
.input-wrap{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid #b9cfe0;border-radius:10px;min-height:49px;padding:0 11px;margin-top:7px;min-width:0}
.input-wrap:focus-within{border-color:var(--blue);box-shadow:0 0 0 2px #dfeaff}
.input-wrap input{width:100%;min-width:0;border:0;background:none;color:var(--ink);font-size:1.05rem;font-weight:650;padding:11px 0;outline:none}
.input-wrap input:focus-visible{outline:none}
.input-wrap span{font-size:.82rem;font-weight:500;color:var(--muted);white-space:nowrap}
.unit-switch{border:0;border-radius:12px;background:#edf4fc;padding:8px;margin:0 0 24px;display:flex;flex-wrap:wrap;gap:6px 14px}
.unit-switch legend{font-size:.82rem;font-weight:650;padding:0 4px}
.unit-switch label{display:flex;align-items:center;gap:7px;min-height:36px;flex:1 1 150px;font-size:.86rem}
.unit-switch input{width:17px;height:17px;accent-color:var(--blue);margin:0}
details.more{border-top:1px dashed var(--line);margin-top:24px;padding-top:14px}
summary{font-weight:700;line-height:1.45;padding-block:7px;font-size:.9rem}
summary::marker{color:var(--blue)}
details .fields{margin-top:15px}
.more>label{margin-top:15px}
.hint,.input-note{font-size:.78rem;color:var(--muted);line-height:1.55;margin:14px 0 0}
.error{font-size:.9rem;color:#9a271f;margin:12px 0 0;font-weight:600}
.error:empty{display:none}
.calculate{border:0;border-radius:12px;background:var(--blue);color:#fff;font-weight:750;font-size:1rem;min-height:49px;padding:12px 18px;margin-top:22px;width:100%}
.calculate:hover{background:#103eb5}
.tool-result{min-width:0;padding:30px;background:linear-gradient(145deg,#dff3ff,#ecfbfa);border-left:1px solid var(--line);display:flex;flex-direction:column;justify-content:center}
.result-kicker{font-size:.74rem;letter-spacing:1.2px;font-weight:800;color:#486587;text-transform:uppercase;margin:0 0 10px}
.result-title{font-size:1.8rem;letter-spacing:-.04em;margin:0 0 12px}
.metric-value{font-size:clamp(2.65rem,5vw,3.7rem);line-height:1.06;font-weight:850;letter-spacing:-.065em;margin:8px 0}
.metric-unit{font-size:1.15rem;font-weight:600;letter-spacing:0}
.result-lead{font-size:1rem;color:#355777;margin:0 0 20px;line-height:1.5}
.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:16px 0}
.result-stat{border:1px solid #b7d8e8;background:#ffffff8a;padding:14px;border-radius:13px;min-width:0}
.result-stat strong,.result-stat b{display:block;font-size:1.36rem;line-height:1.3;letter-spacing:-.035em;overflow-wrap:anywhere}
.result-stat span,.result-stat small{display:block;color:#496581;font-size:.79rem;margin-top:5px;line-height:1.5}
.result-note{font-size:.8rem;line-height:1.6;color:#385b74;margin:12px 0 0}
.result-actions{margin-top:20px}
.result-link{font-weight:750;font-size:.92rem}
.content-section{padding-block:40px;border-bottom:1px solid var(--line)}
.content-section>p{max-width:800px;color:var(--muted)}
.worked-example{background:#fff8dc;border:1px solid #e6d58b;border-radius:18px;padding:24px;margin:22px 0}
.worked-example p{max-width:850px;margin-bottom:0}
.worked-example strong{color:#584919}
.table-scroll{overflow:auto;max-width:100%;border:1px solid var(--line);border-radius:14px;margin:22px 0 0;background:#fff}
table{width:100%;border-collapse:collapse;text-align:left;font-size:.92rem}
caption{text-align:left;padding:15px 18px;background:#eff8ff;color:#365574;font-size:.83rem;font-weight:650}
th,td{padding:14px 18px;border-top:1px solid var(--line);vertical-align:top}
thead th{background:#f7fbfe;font-size:.82rem}
tbody th{font-weight:750}
.table-note{font-size:.78rem!important;margin:12px 0 0!important}
.method{background:#f3f8fd;border:1px solid var(--line);border-radius:14px;padding:12px 20px;margin-top:20px}
.method summary{font-size:1rem}
.method p,.method li{font-size:.9rem;color:#3b5875}
.method p:first-of-type{margin-top:14px}
.formula{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.83rem!important;background:#fff;border-radius:8px;padding:13px;overflow-wrap:anywhere}
.faq-grid,.next-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:22px}
.faq-grid article,.next-card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:22px;min-width:0}
.faq-grid h3,.next-card h3{font-size:1.1rem}
.faq-grid p,.next-card p{font-size:.9rem;color:var(--muted)}
.next-card .button-link{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 14px;border-radius:10px;background:#fff0b3;border:1px solid #ddc164;color:#4d401d;text-decoration:none;font-size:.9rem;font-weight:750}
.next-card .button-link:hover{background:var(--yellow)}
.next-card .secondary-link{display:block;margin-top:13px;font-weight:650;font-size:.88rem}
.paid-note{font-size:.78rem!important;color:#685725!important;margin:16px 0 0!important}
.small-note{font-size:.8rem!important;margin-top:14px!important}
.related-links{display:flex;flex-wrap:wrap;gap:10px 24px;margin-top:24px}
.related-links a{font-size:.9rem;font-weight:650;min-height:38px;display:inline-flex;align-items:center}
.site-footer{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px 24px;padding-block:26px;color:var(--muted);font-size:.8rem}
.site-footer nav{display:flex;flex-wrap:wrap;gap:8px 20px}
.site-footer a{color:var(--muted);min-height:36px;display:inline-flex;align-items:center}
.noscript-note{padding:16px;border:1px solid #dec276;background:#fff9df;border-radius:10px;margin:20px 0;font-size:.9rem}
@media(max-width:760px){.wrap{width:calc(100% - 32px)}.site-header{align-items:center;gap:10px;min-height:74px}.site-header nav{gap:8px 12px}.site-header nav a{font-size:.8rem}.wordmark{font-size:1.4rem}.hero{padding-block:24px}.calculator{grid-template-columns:1fr;border-radius:19px}.tool-form,.tool-result{padding:24px}.tool-result{border-left:0;border-top:1px solid var(--line)}.content-section{padding-block:30px}.faq-grid,.next-grid{grid-template-columns:1fr;gap:14px}.worked-example{padding:20px}.result-title{font-size:1.6rem}th,td{padding:12px 14px}.site-footer{display:block}.site-footer nav{margin-top:7px}}
@media(max-width:390px){.site-header{flex-wrap:wrap;padding-block:12px}.site-header nav{width:100%;justify-content:space-between}.fields{grid-template-columns:1fr}.tool-form,.tool-result{padding:20px}.result-grid{gap:10px}.result-stat{padding:12px}.result-stat strong,.result-stat b{font-size:1.22rem}.form-heading{flex-wrap:wrap;gap:4px}.metric-value{font-size:2.8rem}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}}

.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin-top:18px;padding-top:16px;border-top:1px dashed var(--line)}.share-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 16px;border-radius:10px;border:1px solid var(--blue);background:#fff;color:var(--blue);font:inherit;font-size:.9rem;font-weight:750;cursor:pointer}.share-button:hover{background:var(--ice)}.share-button:focus-visible{outline:3px solid #9cc0ff;outline-offset:2px}.share-status{font-size:.85rem;color:var(--muted)}