:root{color-scheme:light;--ink:#13233f;--ink-soft:#46546b;--paper:#fff;--fog:#f4f7fb;--rule:#cbd6e5;--curve:#2563eb;--probability:#087174;--focus:#d69418;--error:#b42318;--font-display:"Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;--font-body:"Avenir Next", Avenir, "Segoe UI", system-ui, sans-serif;--font-data:"SFMono-Regular", Consolas, "Liberation Mono", monospace;font-family:var(--font-body);color:var(--ink);background:var(--fog)}*{box-sizing:border-box}[hidden]{display:none!important}html{background:var(--fog);min-width:320px}body{text-rendering:optimizelegibility;min-width:320px;margin:0;line-height:1.6}a{color:#174fba;text-underline-offset:.18em;text-decoration-thickness:.08em}a:hover{text-decoration-thickness:.16em}:where(a,button,input,select,textarea):focus-visible{outline:3px solid var(--focus);outline-offset:3px}.skip-link{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link:focus-visible{z-index:100;clip:auto;width:auto;height:auto;color:var(--paper);background:var(--ink);border:0;border-radius:.35rem;margin:0;padding:.55rem .8rem;position:fixed;top:.75rem;left:.75rem;overflow:visible}.site-header,main,footer{width:min(100% - 2rem,76rem);margin-inline:auto}.site-header{border-bottom:1px solid var(--rule);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.9rem 1.5rem;padding-block:1rem;display:flex}.site-name{color:inherit;font-family:var(--font-display);align-items:center;gap:.65rem;font-size:1.05rem;font-weight:700;line-height:1.2;text-decoration:none;display:inline-flex}.site-symbol{width:2rem;height:2rem;color:var(--paper);font-family:var(--font-display);background:var(--ink);border-radius:50%;place-items:center;font-size:1.3rem;display:inline-grid}nav{flex-wrap:wrap;gap:.35rem;display:flex}nav a{color:var(--ink-soft);border-bottom:2px solid #0000;padding:.4rem .65rem;font-size:.9rem;font-weight:650;text-decoration:none}nav a[aria-current=page]{color:var(--ink);border-bottom-color:var(--probability)}main{min-height:65vh;padding-block:clamp(2rem,6vw,5rem)}.tool-hero{gap:clamp(1.5rem,4vw,3rem);display:grid}.tool-heading{grid-template-columns:minmax(0,1fr) minmax(18rem,.55fr);align-items:end;gap:.75rem clamp(2rem,6vw,6rem);display:grid}.tool-heading .eyebrow,.tool-heading h1{grid-column:1}.tool-heading .lede,.tool-heading .trust-list{grid-column:2}.tool-heading .lede{grid-row:1/span 2;align-self:end;margin:0}.trust-list{color:var(--ink-soft);flex-wrap:wrap;gap:.4rem 1rem;margin:0;padding:0;font-size:.82rem;list-style:none;display:flex}.trust-list li:before{color:var(--probability);content:"✓";margin-right:.35rem}.calculator-shell{background:var(--paper);border:1px solid var(--rule);border-top:4px solid var(--probability);border-radius:.7rem;grid-template-columns:minmax(19rem,.78fr) minmax(0,1.22fr);min-width:0;display:grid;overflow:hidden;box-shadow:0 1.5rem 3.5rem #13233f17}.calculator-shell>.calculator-form{border-right:1px solid var(--rule);background:#f8fafc;padding:clamp(1.2rem,3vw,2rem)}.calculator-form__full{grid-column:1/-1}.choice-fieldset{border:0;min-width:0;margin:0;padding:0}.choice-fieldset legend{color:var(--ink);margin-bottom:.5rem;font-weight:750}.choice-grid{gap:.5rem;display:grid}.choice-grid--three{grid-template-columns:repeat(3,minmax(0,1fr))}.choice-grid--four{grid-template-columns:repeat(4,minmax(0,1fr))}.choice-card{cursor:pointer;min-width:0;display:block;position:relative}.choice-card input,.segmented-control input{opacity:0;width:1px;height:1px;position:absolute}.choice-card>span{height:100%;color:var(--ink-soft);background:var(--paper);border:1px solid #9eacbf;border-radius:.4rem;gap:.1rem;padding:.75rem;display:grid}.choice-card small{font-size:.72rem}.choice-card input:checked+span{color:var(--ink);border-color:var(--probability);box-shadow:inset 0 0 0 1px var(--probability);background:#eaf4f4}.choice-card input:focus-visible+span,.segmented-control input:focus-visible+span{outline:3px solid var(--focus);outline-offset:2px}.segmented-control{background:#dfe6ef;border-radius:.45rem;grid-template-columns:repeat(2,minmax(0,1fr));width:100%;max-width:18rem;padding:.2rem;display:grid}.segmented-control label{cursor:pointer;position:relative}.segmented-control span{color:var(--ink-soft);text-align:center;border-radius:.3rem;padding:.45rem .7rem;font-size:.85rem;font-weight:700;display:block}.segmented-control input:checked+span{color:var(--ink);background:var(--paper);box-shadow:0 1px 3px #13233f2e}.calculator-actions{flex-wrap:wrap;gap:.65rem;margin-top:.25rem;display:flex}.button{min-height:2.75rem;font:inherit;cursor:pointer;border:1px solid #0000;border-radius:.38rem;padding:.65rem 1rem;font-weight:750}.button--primary{color:var(--paper);background:var(--ink);flex:13rem}.button--primary:hover{background:#21395f}.button--secondary{color:var(--ink);background:0 0;border-color:#8b9ab0}.error-summary{color:#7a271a;border:1px solid #f0a59d;border-left:4px solid var(--error);background:#fef3f2;border-radius:.35rem;padding:.75rem .85rem;font-weight:650}.inverse-output,.curve-output{background-color:var(--paper);background-image:linear-gradient(#13233f09 1px,#0000 1px),linear-gradient(90deg,#13233f09 1px,#0000 1px);background-size:24px 24px;min-width:0;padding:clamp(1.2rem,3vw,2rem)}.result-placeholder{gap:1.25rem;display:grid}.result-placeholder h2,.result-header h2,.content-section h2{font-family:var(--font-display);margin:0;font-size:clamp(1.8rem,3vw,2.8rem);line-height:1.05}.result-placeholder p,.result-header p{margin-block:.5rem 0}.result-statement{max-width:58ch;color:var(--ink-soft)}.result-metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;margin-block:1.2rem;display:grid}.result-metric{border:1px solid var(--rule);border-left:4px solid var(--probability);background:#ffffffe0;border-radius:.4rem;gap:.2rem;min-width:0;padding:.85rem;display:grid}.result-metric__label{color:var(--ink-soft);font-size:.78rem}.result-metric__value{overflow-wrap:anywhere;font-family:var(--font-data);font-size:clamp(1rem,2vw,1.25rem)}.result-steps{border:1px solid var(--rule);background:#f7f9fc;border-radius:.4rem;margin-block:1.2rem;padding:1rem}.result-steps h3{margin:0 0 .55rem;font-size:1rem}.result-steps ol{color:var(--ink-soft);gap:.35rem;margin:0;padding-left:1.35rem;font-size:.9rem;display:grid}.result-chart{min-width:0}.result-stale{color:#69410d;border:1px solid #e8c679;border-left:4px solid var(--focus);background:#fff8e8;flex-wrap:wrap;gap:.35rem;padding:1rem;display:flex}.content-section{border-top:1px solid var(--rule);gap:1.5rem;margin-top:clamp(4rem,9vw,7rem);padding-top:clamp(1.5rem,4vw,2.5rem);display:grid}.content-section--narrow{width:min(100%,56rem)}.section-heading{gap:.5rem;display:grid}.section-heading .eyebrow,.section-heading h2{margin:0}.method-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin:0;padding:0;list-style:none;display:grid}.method-grid li,.example-card{background:var(--paper);border:1px solid var(--rule);border-radius:.45rem;padding:1.25rem}.method-number{color:var(--probability);font-family:var(--font-data);margin-bottom:1.2rem;font-size:.8rem;font-weight:800;display:block}.method-grid h3,.example-card h3{margin:0;font-size:1.05rem}.method-grid p,.example-card p{color:var(--ink-soft);margin-bottom:0}.example-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;display:grid}.formula-line{font-family:var(--font-data);font-size:.82rem}.faq-list{gap:.65rem;display:grid}.faq-list details{background:var(--paper);border:1px solid var(--rule);border-radius:.4rem;padding:1rem 1.1rem}.faq-list summary{color:var(--ink);cursor:pointer;font-weight:750}.faq-list p{max-width:70ch;color:var(--ink-soft);margin-bottom:0}.source-section{grid-template-columns:minmax(0,1fr) minmax(16rem,.65fr)}.source-list{align-content:start;gap:.45rem;margin:0;padding-left:1.2rem;display:grid}.cross-tool-link{border-left:4px solid var(--probability);background:#eaf4f4;grid-column:1/-1;margin:0;padding:1rem}.scaffold-panel{background-color:var(--paper);border:1px solid var(--rule);border-top:4px solid var(--probability);background-image:linear-gradient(#13233f0a 1px,#0000 1px),linear-gradient(90deg,#13233f0a 1px,#0000 1px);background-size:24px 24px;border-radius:.7rem;grid-template-columns:minmax(0,.86fr) minmax(24rem,1.14fr);align-items:center;gap:clamp(2rem,5vw,4.5rem);padding:clamp(1.4rem,4vw,3.5rem);display:grid;position:relative;overflow:hidden;box-shadow:0 1.5rem 3.5rem #13233f17}.scaffold-copy,.shared-proof{min-width:0}.eyebrow{color:var(--probability);font-family:var(--font-data);letter-spacing:.08em;text-transform:uppercase;margin:0 0 1rem;font-size:.74rem;font-weight:750}h1{max-width:13ch;font-family:var(--font-display);letter-spacing:-.045em;margin:0;font-size:clamp(2.35rem,5vw,4.7rem);font-weight:650;line-height:.98}.lede{max-width:42rem;color:var(--ink-soft);margin-block:1.35rem;font-size:clamp(1rem,1.8vw,1.15rem)}.checkpoint{color:#075f61;font-family:var(--font-data);background:#e6f4f3;border:1px solid #9acbc9;border-radius:999px;align-items:center;gap:.5rem;margin-block:0 1rem;padding:.35rem .65rem;font-size:.75rem;font-weight:700;display:inline-flex}.source-note{color:var(--ink-soft);margin-top:1.25rem;font-size:.82rem}.calculator-form{grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;width:100%;max-width:100%;display:grid}.calculator-field{gap:.35rem;min-width:0;display:grid}.calculator-field label{color:var(--ink);font-weight:700}.calculator-field input,.calculator-field select{width:100%;min-width:0;color:var(--ink);font:inherit;background:var(--paper);border:1px solid #8b9ab0;border-radius:.35rem;padding:.7rem .75rem}.calculator-field [aria-invalid=true]{border-color:var(--error);box-shadow:0 0 0 1px var(--error)}.field-help,.field-error{margin:0;font-size:.82rem}.field-help{color:var(--ink-soft)}.field-error{color:var(--error);font-weight:650}.result-region{min-width:0;max-width:100%}.normal-curve{border:1px solid var(--rule);background:#ffffffe0;border-radius:.5rem;min-width:0;margin:0;padding:clamp(.65rem,2vw,1rem)}.normal-curve__svg{width:100%;height:auto;display:block;overflow:visible}.normal-curve__hatch-line{stroke:#0f6f71;stroke-width:4px;opacity:.6}.normal-curve__area{fill:url(#probability-hatch);stroke:var(--probability);stroke-width:1.5px;vector-effect:non-scaling-stroke}.normal-curve__axis,.normal-curve__tick{stroke:#6b778c;stroke-width:1.5px;vector-effect:non-scaling-stroke}.normal-curve__line{stroke:var(--curve);stroke-width:3px;stroke-linecap:round;stroke-linejoin:round;vector-effect:non-scaling-stroke}.normal-curve__boundary{stroke:var(--ink);stroke-width:2px;stroke-dasharray:5 4;vector-effect:non-scaling-stroke}.normal-curve__boundary--off-chart{stroke:var(--error);stroke-width:3px}.normal-curve__tick-label,.normal-curve__boundary-label{fill:var(--ink-soft);font-family:var(--font-data);font-size:18px}.normal-curve__boundary-label{fill:var(--ink);font-weight:700}.normal-curve__caption{color:var(--ink-soft);border-top:1px solid var(--rule);grid-template-columns:auto 1fr;align-items:baseline;gap:.25rem .75rem;margin-top:.45rem;padding-top:.75rem;font-size:.9rem;display:grid}.normal-curve__caption strong{color:var(--ink);font-family:var(--font-data);letter-spacing:.06em;text-transform:uppercase;font-size:.72rem}footer{color:var(--ink-soft);border-top:1px solid var(--rule);flex-wrap:wrap;justify-content:space-between;gap:.5rem 2rem;padding-block:2rem;font-size:.85rem;display:flex}footer p{margin:0}footer p:last-child{flex-wrap:wrap;gap:.35rem .8rem;display:flex}.privacy-page{gap:2rem;max-width:52rem;margin-inline:auto;display:grid}.privacy-page>header,.privacy-page>section{background:var(--paper);border:1px solid var(--rule);border-radius:.6rem;padding:clamp(1.25rem,3vw,2rem)}.privacy-page h1{max-width:none}.privacy-page h2{font-family:var(--font-display);margin-top:0;font-size:clamp(1.4rem,3vw,2rem)}.privacy-page p,.privacy-page li{max-width:72ch}.privacy-page__reviewed{color:var(--ink-soft);font-family:var(--font-data);margin-bottom:0;font-size:.8rem}@media (width<=52rem){.tool-heading,.calculator-shell,.source-section{grid-template-columns:minmax(0,1fr)}.tool-heading .eyebrow,.tool-heading h1,.tool-heading .lede,.tool-heading .trust-list{grid-area:auto/1}.calculator-shell>.calculator-form{border-right:0;border-bottom:1px solid var(--rule)}.method-grid,.example-grid,.scaffold-panel{grid-template-columns:minmax(0,1fr)}h1{max-width:16ch}}@media (width<=32rem){.site-header,main,footer{width:min(100% - 1rem,76rem)}.site-header{align-items:flex-start}nav{width:100%}nav a{text-align:center;flex:auto}.scaffold-panel{background-size:18px 18px;gap:1.5rem;padding:1.1rem}h1{font-size:clamp(2.25rem,13vw,3.25rem)}.normal-curve{padding:.35rem}.normal-curve__caption{grid-template-columns:1fr}.calculator-form,.choice-grid--three{grid-template-columns:minmax(0,1fr)}.choice-grid--four{grid-template-columns:repeat(2,minmax(0,1fr))}.choice-card>span{grid-template-columns:1fr auto;align-items:baseline}.result-metrics{grid-template-columns:minmax(0,1fr)}.normal-curve__tick-label,.normal-curve__boundary-label{font-size:20px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}
