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var(--line);padding:28px;border-radius:12px;background:var(--panel)}.side-note .tool-icon{margin-bottom:25px}.side-note p{font-size:13px}.side-note a{font-size:12px;color:var(--accent)}.formula{padding:24px;border:1px solid var(--line);border-left:3px solid var(--accent);background:var(--soft);font-size:13px;line-height:1.8;margin:28px 0;border-radius:5px}.callout{background:var(--soft);border-radius:10px;padding:25px;margin-top:32px}.callout p{margin:10px 0 0!important;font-size:13px!important}.article{max-width:800px;padding-bottom:70px}.article h2{font-size:27px;margin-top:35px}.article .primary{margin:10px 0 20px}.guide-toc{display:flex;gap:18px;flex-wrap:wrap;padding-bottom:25px;border-bottom:1px solid var(--line);font-size:12px}.reading-grid section{margin-bottom:45px}.first{padding-top:0}footer{margin-top:65px;padding:55px 0 0;background:var(--soft);border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:2fr 1fr 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@media(min-width:1500px){.hero{padding-top:110px;padding-bottom:110px}}@media(max-width:1050px){.wrap{width:calc(100% - 48px)}.hero{gap:30px}.hero h1{font-size:49px}.hero-proof{gap:10px;font-size:9px}.hero-actions{gap:15px}.subtle{font-size:11px}.directory{grid-template-columns:repeat(2,1fr)}.preview-grid{grid-template-columns:1fr 1fr}.preview-grid>.calculator:last-child{grid-column:1/-1}.preview-grid>.calculator:last-child .workspace{display:grid}.nav{gap:17px}.nav nav{gap:18px}.reading-grid{gap:35px}.section-heading>p{max-width:280px}.hero .calc-top{padding:15px}.hero .inputs,.hero .result{padding:18px}.hero .field-grid{gap:8px}.hero label{font-size:10px}.hero input{padding:9px}.hero .live{font-size:8px}}@media(max-width:760px){.wrap{width:calc(100% - 36px)}.nav{height:auto;min-height:76px;flex-wrap:wrap;padding:16px 0;gap:10px}.brand{font-size:23px}.nav nav{order:3;width:100%;justify-content:center;border-top:1px solid var(--line);padding-top:12px;margin-top:4px;font-size:12px;gap:30px}.nav-cta{margin-left:auto;font-size:10px;padding:8px 10px}.nav-cta span{margin-left:5px}.theme{margin-left:auto;width:32px;height:32px}.hero{grid-template-columns:1fr;padding-top:48px;padding-bottom:42px;gap:45px}.hero h1{font-size:clamp(40px,8.8vw,62px)}.hero-copy>p{font-size:15px;max-width:530px}.hero-proof{font-size:10px;gap:17px}.hero-actions{gap:24px}.hero .calculator{max-width:550px}.hero-lab{max-width:550px;width:100%;margin:auto}.hero .live{font-size:9px}.hero .inputs,.hero .result{padding:22px}.hero label{font-size:11px}.hero .field-grid{gap:14px}.principle-strip>.wrap{flex-wrap:wrap;gap:10px;justify-content:center;font-size:9px}.principle-strip span:first-child{width:100%;text-align:center}.section{padding-top:48px}.section-heading{display:block}.section-heading>p{margin-top:15px;max-width:none}.directory{gap:12px}.tool-card{padding:20px 16px}.tool-card h3{font-size:17px}.card-link{font-size:10px}.preview-grid{grid-template-columns:1fr}.preview-grid>.calculator:last-child{grid-column:auto}.preview-grid>.calculator:last-child .workspace{display:block}.preview-grid .calc-top .live{display:block}.workspace{grid-template-columns:1fr}.result{border-left:0;border-top:1px solid var(--line)}.inputs,.result{padding:23px}.education-cards{grid-template-columns:1fr;gap:35px}.education-cards article{border-top:1px solid var(--line);padding-top:25px}.education-cards .mono{margin-bottom:15px}.math-section{margin-top:50px;padding:45px 0}.faq-section{grid-template-columns:1fr;gap:10px;padding-bottom:30px}.faq-section>div>p{display:none}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-grid>div:first-child{grid-column:1/-1}.footer-bottom{display:block}.footer-bottom p{margin:15px 0}.reading-grid{grid-template-columns:1fr;gap:30px;padding-top:45px}.page-intro{padding-top:40px;padding-bottom:25px}.page-intro h1{font-size:37px}.page-intro>p{font-size:15px}.side-note{display:block}.formula{font-size:12px;padding:18px}.reading-grid article p{font-size:14px}.text-button{min-height:38px}.page-intro .eyebrow{font-size:9px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* Front-end refinement pass — 17 October 2026 */
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.field-grid{border:0;padding:0;margin:0;min-width:0}.brandmark{width:38px;height:38px;margin-right:9px;transform:none}.brandmark svg{display:block;width:100%;height:100%;overflow:visible}.brandmark path{fill:none;stroke:var(--accent);stroke-width:4;stroke-linecap:round}.nav [aria-current=page]{color:var(--text);position:relative}.nav [aria-current=page]:after{content:'';position:absolute;left:0;right:0;bottom:-11px;height:2px;border-radius:2px;background:var(--accent)}.theme{width:44px;height:44px;display:inline-grid;place-items:center}.eyebrow,.calc-top .eyebrow,.floating-label,.result-label,.metric span,.bar-label,.number,.live{font-size:11px}.input-note,.result-note,.text-button,.card-link,.education-cards .mono,.footer-bottom,.footer-bottom p{font-size:11px}label{font-size:12px}.nav nav,.nav-cta{font-size:13px}.remove{width:44px;height:44px}.text-button{min-height:44px;padding-inline:3px}.secondary{min-height:44px;font-size:12px}.copy-fallback{display:block;min-height:90px;margin-top:8px}.verified{display:flex;align-items:center;gap:22px;margin-top:16px;padding:14px 18px;border:1px solid var(--line);border-radius:9px;background:var(--soft);font-size:12px;color:var(--muted)}.verified span:first-child{color:var(--accent)}.verified a{margin-left:auto;color:var(--accent)}.support-card{margin:34px 0;padding:30px;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:10px;background:var(--soft)}.support-card .eyebrow{display:block}.support-card h2{margin-top:10px}.check-list{margin:0 0 28px;padding:0;list-style:none;color:var(--muted)}.check-list li{position:relative;padding:8px 0 8px 28px}.check-list li:before{content:'✓';position:absolute;left:0;color:var(--accent);font-weight:700}.footer-bottom a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}input[aria-invalid=true],select[aria-invalid=true]{border-color:var(--danger);box-shadow:0 0 0 1px var(--danger)}
html[data-theme=light] .calculator,html[data-theme=light] .tool-card,html[data-theme=light] .side-note{box-shadow:0 18px 50px rgba(31,64,90,.08)}html[data-theme=light] header{box-shadow:0 1px 0 var(--line)}html[data-theme=light] input,html[data-theme=light] select{background:#fff}html[data-theme=light] .primary{color:#fff;background:#007d70}html[data-theme=light] .hero-lab:before{background:radial-gradient(ellipse,rgba(0,125,112,.11),transparent 68%)}
@media(max-width:760px){.nav-cta{font-size:11px}.hero-actions,.hero-proof{flex-wrap:wrap}.hero .field-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.verified{flex-wrap:wrap}.verified a{margin-left:0;width:100%}.page-intro .eyebrow{font-size:10px}}
@media(max-width:480px){.wrap{width:calc(100% - 28px)}.nav{gap:8px}.nav>.brand{font-size:21px}.nav>.brand .brandmark{width:32px;height:32px;margin-right:5px}.nav-cta{padding:8px 9px}.nav-cta span{display:none}.nav nav{gap:18px;font-size:11px;overflow-x:auto;justify-content:flex-start}.hero{padding-top:38px}.hero-actions{align-items:stretch}.hero-actions .primary,.hero-actions .subtle{width:100%;text-align:center;justify-content:center}.hero-actions .subtle{padding:10px}.hero-proof{display:grid;grid-template-columns:1fr 1fr;gap:8px 14px}.hero .field-grid,.field-grid{grid-template-columns:1fr}.hero .inputs,.hero .result,.inputs,.result{padding:19px}.directory{grid-template-columns:1fr}.tool-card p{min-height:0}.principle-strip b{display:none}.principle-strip>.wrap{justify-content:flex-start}.principle-strip span:not(:first-child){width:100%;font-size:11px}.metrics{gap:14px}.result-big{font-size:36px}.calc-top{padding:15px 18px}.calc-top .live{font-size:10px}.actions{gap:10px 16px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.page-intro h1{font-size:34px}.support-card{padding:22px}.verified{font-size:11px;gap:8px 15px}.guide-toc{display:grid;grid-template-columns:1fr 1fr}.lab-caption{display:none}}

/* Readable type scale: compact analytics UI without sub-12px body copy. */
body{font-size:16px}
.small{font-size:14px}
.tool-card p,.education-cards p,.side-note p,.callout p,.faq p{font-size:14px}
.card-link,.education-cards a,.side-note a,.guide-toc,.secondary{font-size:13px}
label{font-size:13px}
.input-note,.result-note,.result details,.result details p,.text-button{font-size:12px}
.result-label,.metric span,.number,.live,.eyebrow,.calc-top .eyebrow,.floating-label,.education-cards .mono{font-size:12px}
.bar-label{font-size:11px}
.footer-grid>div:first-child p,.footer-grid>div:not(:first-child) a{font-size:13px}
.footer-bottom,.footer-bottom p{font-size:12px;line-height:1.65}
.verified{font-size:13px}
@media(max-width:760px){.hero-copy>p,.page-intro>p{font-size:16px}.reading-grid article p{font-size:15px}.section-heading>p{font-size:14px}.nav nav{font-size:13px}.nav-cta{font-size:12px}.hero-proof{font-size:11px}.principle-strip>.wrap{font-size:11px}.page-intro .eyebrow{font-size:11px}}
@media(max-width:480px){.nav nav{font-size:12px}.tool-card h3{font-size:19px}.tool-card p{font-size:14px}.verified{font-size:12px}.principle-strip span:not(:first-child){font-size:12px}.guide-toc{font-size:13px}}

/* Mobile containment: prevent decorative and grid elements widening the page. */
html,body{max-width:100%;overflow-x:clip}
main,header,footer,section,.principle-strip{max-width:100%}
.hero>* ,.workspace>* ,.field-grid>* ,.metrics>* ,.directory>* ,.preview-grid>* ,.education-cards>* ,.reading-grid>*{min-width:0}
.calculator,.hero-lab,.inputs,.result{width:100%;max-width:100%}
p,h1,h2,h3,h4,.metric,.result-note{overflow-wrap:anywhere}
@media(max-width:760px){
  .hero{overflow:hidden}
  .hero-lab:before{inset:-18px}
  .principle-strip>.wrap{display:grid;grid-template-columns:1fr;justify-items:start;gap:12px;padding-top:26px;padding-bottom:26px}
  .principle-strip>.wrap span,.principle-strip>.wrap span:first-child{width:auto;max-width:100%;text-align:left}
  .principle-strip>.wrap b{display:none}
}

/* Mobile hero legibility and balanced EV icon. */
.tool-icon-expected-value{font-size:22px}
@media(max-width:760px){
  .hero-actions .subtle{font-size:15px;font-weight:500;line-height:1.5}
  .hero-proof{font-size:14px;line-height:1.5;gap:12px 22px}
}