/* Stacked cards: each section after "Why Zeyn?" rises over the previous one */
html.stk-on .stk{position:sticky;transform-origin:50% 0;will-change:transform;overflow:hidden;overflow:clip;isolation:isolate;max-width:100%}
html.stk-on main{overflow-x:clip}
html.stk-on .stk+.stk,html.stk-on .stk~.stk{box-shadow:0 -18px 40px -24px rgba(19,38,28,.35)}
html.stk-on #faq{background:var(--lav1,#f3efe6)}
/* heading reveal (lil-boxes style: from y:100px, scale .95, opacity 0, expo.out) */
html.hrv-on h2.hrv{opacity:0;transform:translateY(60px) scale(.95);transition:opacity .9s cubic-bezier(.16,1,.3,1),transform 1s cubic-bezier(.16,1,.3,1)}
html.hrv-on h2.hrv.in{opacity:1;transform:none}
html.stk-on.stk-m .stk{position:relative!important;top:0!important;transform:none!important}
html.stk-on #problem.stk-why{position:sticky;z-index:9}
html.stk-on.stk-m #problem.stk-why{position:relative!important}