/* V21 shared mobile-first safeguards */
:root{--sans:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
html{-webkit-text-size-adjust:100%}body{overflow-wrap:anywhere}
img{height:auto}.lp-button,.article-button,.calc-button,button,input,select,textarea{touch-action:manipulation}
@media(max-width:680px){
 input:not([type=checkbox]):not([type=radio]),select,textarea{font-size:16px!important}
 .lp-container,.article-shell{width:min(100% - 26px,var(--max,1180px))}
 .lp-header,.article-header{backdrop-filter:blur(12px)}
 .lp-button,.article-button,.calc-button{min-height:48px}
 .tool-form,.calc-form,.diag-card form{min-width:0}
}
@supports(content-visibility:auto){.lp-content>section,.article-section{content-visibility:auto;contain-intrinsic-size:auto 680px}}