.product-stack{--stack-red:#ff000f;--stack-light-grey:#f0f0f0;--stack-black:#010101;--stack-card-background:#0f172a;--stack-white:#fff;--stack-card-pad:clamp(24px, 3.5vw, 42px);--stack-image-gutter:clamp(22px, 4.2vw, 56px);--stack-image-scale:1.28}.product-stack .stack-section{background:#0f172a;height:420vh;position:relative}.product-stack .sticky-container{justify-content:center;align-items:center;height:100dvh;display:flex;position:sticky;top:0;overflow:hidden;transform:translateZ(0)}.product-stack .card{border:2px solid var(--stack-red);background:var(--stack-card-background);width:min(860px,82vw);height:min(560px,70vh);padding:var(--stack-card-pad);will-change:transform;backface-visibility:hidden;opacity:1;border-radius:28px;justify-content:center;align-items:center;display:flex;position:absolute;top:50%;left:50%;overflow:hidden;transform:translate(-50%,-50%);box-shadow:0 24px 60px #00000073}.product-stack .card-inner{grid-template-rows:minmax(0,1fr);grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);align-items:center;gap:clamp(16px,2.5vw,28px);width:100%;height:100%;min-height:0;display:grid}.product-stack .card-copy{z-index:1;flex-direction:column;justify-content:center;align-items:flex-start;gap:12px;width:100%;min-width:0;min-height:0;max-height:100%;display:flex;position:relative;overflow:visible}.product-stack .card-image-wrap{z-index:0;width:calc(100% + var(--stack-card-pad));height:calc(100% + 2 * var(--stack-card-pad));margin:calc(-1 * var(--stack-card-pad)) var(--stack-image-gutter) calc(-1 * var(--stack-card-pad)) calc(-1 * var(--stack-image-gutter));background:#0f172a;justify-content:center;align-items:center;min-width:0;min-height:0;display:flex;position:relative;overflow:hidden}.product-stack .card-image{object-fit:contain;object-position:center;width:100%;height:100%;max-height:none;transform:scale(var(--stack-image-scale));transform-origin:50%}.product-stack .card-heading{letter-spacing:0;flex-direction:column;gap:.55em;max-width:760px;margin:0;font-size:clamp(1.55rem,2.8vw,2.45rem);font-weight:800;line-height:1.05;display:flex}.product-stack .card-heading span{display:block}.product-stack .card-heading-accent{color:var(--stack-red)}.product-stack .card-description{max-width:520px;color:var(--stack-white);flex-shrink:0;margin:0;font-size:clamp(.78rem,1vw,.92rem);font-weight:400;line-height:1.45}.product-stack .card-actions-list{color:var(--stack-white);flex-direction:column;flex-shrink:0;gap:8px;margin:0;padding:0;font-size:.88rem;font-weight:500;list-style:none;display:flex}.product-stack .card-actions-list li{align-items:center;gap:10px;display:flex}.product-stack .card-actions-list li:before{content:"✓";background:var(--stack-red);width:18px;height:18px;color:var(--stack-white);border-radius:50%;flex-shrink:0;place-items:center;margin-right:0;font-size:.62rem;font-weight:800;line-height:1;display:grid}.product-stack .card-buttons{flex-wrap:wrap;flex-shrink:0;gap:12px;margin-top:4px;display:flex}@media (max-width:600px){.product-stack .card{height:min(650px,82vh)}.product-stack .card-inner{grid-template-columns:minmax(0,1fr);align-items:stretch;gap:24px;overflow-y:auto}.product-stack .card-copy,.product-stack .card-image-wrap{flex:none}.product-stack .card-image-wrap{order:-1;width:100%;height:auto;margin:0}.product-stack .card-image{height:auto;max-height:300px;transform:none}.product-stack .card-actions-list{gap:8px}.product-stack .card-buttons,.product-stack .card-buttons>*{width:100%}}