.challenge-deck-section{background:#f8f7f0;padding-block:90px 100px;color:#183e35}
.challenge-heading{text-align:center;max-width:850px;margin:0 auto 50px}.challenge-heading h2{font-size:clamp(2.6rem,5vw,4.6rem);margin:20px 0}.challenge-heading>p:last-child{font-size:1.2rem;line-height:1.5;color:#52655e}
.challenge-deck{max-width:570px;margin:auto}.challenge-position{font-size:.78rem;letter-spacing:.11em;text-transform:uppercase;margin:0 16px 24px;color:#52655e}.challenge-stack{position:relative;perspective:1600px;isolation:isolate;margin:0 12px}.challenge-stack:before,.challenge-stack:after{content:'';position:absolute;inset:0;border-radius:32px;background:#dbe3c5;transform:rotate(-4deg);z-index:-1}.challenge-stack:after{background:#e6dacb;transform:rotate(3deg)}
.challenge-card[hidden]{display:none}.challenge-card{scroll-margin-top:140px}.challenge-card-turn{display:grid;transform-style:preserve-3d;transition:transform .7s cubic-bezier(.2,.7,.2,1)}.challenge-card.is-flipped .challenge-card-turn{transform:rotateY(180deg)}.challenge-face{grid-area:1/1;min-width:0;min-height:570px;border:0;border-radius:30px;padding:36px;background:var(--card-tone);color:#183e35;backface-visibility:hidden;-webkit-backface-visibility:hidden;box-shadow:0 14px 40px #183e3510}.challenge-front{width:100%;display:flex;align-items:center;flex-direction:column;justify-content:space-between;gap:16px;text-align:center;font:inherit;cursor:pointer}.challenge-prompt{font-family:var(--heading);font-size:clamp(1.65rem,3vw,2.1rem);line-height:1.2;max-width:17ch}.challenge-art{display:block;width:min(100%,300px);margin:auto}.challenge-art svg{display:block;width:100%;height:270px;overflow:visible}.challenge-category{font-size:.8rem;text-transform:uppercase;letter-spacing:.16em}.challenge-hint{font-size:.9rem;opacity:.65}.challenge-back{transform:rotateY(180deg);display:flex;flex-direction:column;justify-content:center;gap:20px}.challenge-back h3{font-size:clamp(1.65rem,3vw,2.15rem)}.challenge-back>p:not(.eyebrow){font-size:1.2rem;line-height:1.5}.challenge-back .text-link{align-self:flex-start;font-size:1.15rem}.challenge-return{background:none;border:0;text-align:left;padding:8px 0;font:inherit;font-size:.95rem;text-decoration:underline;text-underline-offset:4px;align-self:flex-start}.challenge-controls{display:grid;grid-template-columns:44px minmax(0,1fr) 44px;gap:12px;margin:30px 4px 20px}.challenge-arrow{border:1px solid #183e3530;border-radius:50%;background:transparent;font-size:1.5rem;min-height:44px;line-height:1}.challenge-flip{background:#183e35;color:#fffdf4;border:0;border-radius:30px;min-height:48px;font:inherit;font-size:1.1rem;padding:10px 15px}.challenge-choices{display:flex;justify-content:center;flex-wrap:wrap;gap:6px}.challenge-choices button{border:1px solid transparent;border-radius:22px;padding:7px 12px;background:transparent;color:#52655e;font:inherit;font-size:.95rem;min-height:42px}.challenge-choices button[aria-pressed=true]{background:#183e35;color:#fffdf4}.challenge-count{text-align:center;font-size:.9rem;margin-top:10px;color:#52655e}.challenge-deck button:focus-visible{outline:3px solid #86669b;outline-offset:5px}
@media(min-width:1050px){.challenge-deck-section>.wrap{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:7vw}.challenge-heading{text-align:left;margin:0}.challenge-deck{width:100%}}
@media(max-width:600px){.challenge-deck-section{padding-block:65px 75px}.challenge-heading{margin-bottom:36px}.challenge-heading>p:last-child{font-size:1.1rem}.challenge-stack{margin-inline:4px}.challenge-face{min-height:580px;border-radius:25px;padding:28px 23px}.challenge-art svg{height:245px}.challenge-back{gap:17px}.challenge-back>p:not(.eyebrow){font-size:1.1rem;line-height:1.45}.challenge-back h3{font-size:1.65rem}.challenge-prompt{font-size:1.8rem}.challenge-controls{gap:8px;margin-inline:0}.challenge-choices button{padding:6px 9px;font-size:.9rem}.challenge-position{margin-left:4px;font-size:.7rem}}
@media(prefers-reduced-motion:reduce){.challenge-card-turn{transition:none}}
html[data-motion=off] .challenge-card-turn{transition:none}

.challenge-art .workplace-art-highlight{fill:none;stroke:#fffdf4;stroke-width:1.4;stroke-linecap:round;opacity:.45}.challenge-art .workplace-art-contour{fill:none;stroke:#102f28;stroke-width:1.4;stroke-linecap:round;opacity:.19}
/* Reserve space for the header and controls, with content-led height for the blurb. */
@media(max-width:600px){
 .challenge-deck{scroll-margin-top:100px}.challenge-position{margin-bottom:12px}
 .challenge-face{min-height:clamp(350px,calc(100svh - 270px),460px);padding:20px;border-radius:24px}
 .challenge-front{gap:10px}.challenge-prompt{font-size:1.6rem}.challenge-art{width:min(100%,240px)}.challenge-art svg{height:180px}.challenge-category{font-size:.7rem}.challenge-hint{font-size:.8rem}
 .challenge-back{gap:11px}.challenge-back .eyebrow{font-size:.65rem;line-height:1.35}.challenge-back h3{font-size:1.45rem;line-height:1.15}.challenge-back>p:not(.eyebrow){font-size:1rem;line-height:1.35;margin:0}.challenge-back .text-link{font-size:1rem;line-height:1.3}.challenge-return{display:none}
 .challenge-controls{margin:18px 0 8px;gap:8px}.challenge-flip{font-size:1rem;min-height:44px;padding:8px 12px}
 .challenge-choices{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:3px}.challenge-choices button{font-size:.77rem;padding:5px 3px;min-height:40px;line-height:1.1;border-radius:16px}.challenge-count{margin-top:5px;font-size:.75rem}
}

@media(max-width:600px){html.challenge-inview .page-navigation:not(:focus-within){visibility:hidden;pointer-events:none}}

.challenge-stack{touch-action:pan-y pinch-zoom}
.challenge-stack{display:grid;perspective-origin:50% 50%}
.challenge-deck-section{overflow-x:clip}
.challenge-card{grid-area:1/1;position:relative;min-width:0;transform-origin:50% 50%}
.challenge-stack.is-dealing .challenge-card{pointer-events:none;will-change:transform,opacity}
.challenge-stack.is-dealing .challenge-card-turn{transition:none}

/* Keep the complete paper-and-clay scenes inside the existing artwork space. */
.challenge-art__scene{display:block;width:100%;height:270px;object-fit:contain;object-position:center;pointer-events:none}
@media(max-width:600px){.challenge-art__scene{height:180px}}