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@media(min-width:1500px){.ad-rail:not(:empty){min-height:600px;position:sticky;top:20px}.site-frame{grid-template-columns:minmax(120px,1fr) minmax(0,1120px) minmax(120px,1fr)}}
@media(max-width:1050px){.site-frame{grid-template-columns:minmax(0,1fr)}.site-frame>.ad-rail{display:none}.hero{gap:24px}.calculator-layout{grid-template-columns:minmax(0,1.1fr) minmax(290px,.9fr)}}
@media(max-width:760px){.site-header{height:64px;padding:0 20px}.site-header nav{gap:16px}.site-header nav a{font-size:11px}.site-frame{padding:0 16px}.hero{min-height:0;padding:39px 0 25px;grid-template-columns:1fr;gap:24px}.hero-copy{max-width:620px}.eyebrow{margin-bottom:17px}.hero-lede{font-size:14px}.hero-art{max-width:570px;margin-left:auto;width:100%}.calculator-layout{grid-template-columns:1fr;gap:14px}.results-card{position:static;grid-row:1;padding:20px}.calculator-card{padding:23px 18px 20px}.result-number strong{font-size:39px}.method-section{padding-top:54px}.method-grid{grid-template-columns:1fr}.notes-section{grid-template-columns:1fr}.sources-section{grid-template-columns:1fr;gap:12px;padding:29px 0}.footer-inner{grid-template-columns:1fr auto}.footer-inner>p{grid-column:1/-1;grid-row:2}.footer-inner nav{grid-column:2;grid-row:1}.footer-inner small{grid-row:3}.method-section{scroll-margin-top:15px}}
@media(max-width:520px){body{font-size:15px}.brand{font-size:12px}.site-header nav{gap:12px}.site-header nav a{font-size:10px}.hero{padding-top:31px}h1{font-size:42px}.hero-art{padding:12px 12px 11px}.art-caption{font-size:9px}.field-grid--three{grid-template-columns:repeat(2,minmax(0,1fr))}.field-grid--shape{gap:13px 10px}.field{font-size:11px}.field input,.field select{height:42px;padding-left:9px;font-size:13px}.form-footer{align-items:flex-start;flex-direction:column}.calculate-button{width:100%}.calculator-card legend{font-size:12px}.card-intro{font-size:12px}.equation{grid-template-columns:.65fr 1.35fr}.equation strong{font-size:11px}.footer-inner{padding:23px 20px}.footer-inner nav{gap:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* Keep the main content in the center grid track even when empty ad rails collapse. */
@media(min-width:1051px){#ad-rail-left{grid-column:1}.main-content{grid-column:2}#ad-rail-right{grid-column:3}}
@media(max-width:1050px){.main-content{grid-column:1}}