/* 500 Filipino Passivhaus Challenge popup */
.ac-challenge-popup{position:fixed;inset:0;z-index:2010;display:grid;place-items:center;padding:1.25rem;visibility:hidden;opacity:0;pointer-events:none;transition:opacity .28s ease,visibility .28s ease}.ac-challenge-popup.is-open{visibility:visible;opacity:1;pointer-events:auto}.ac-challenge-popup-backdrop{position:absolute;inset:0;background:rgba(3,7,10,.8);backdrop-filter:blur(7px);-webkit-backdrop-filter:blur(7px)}.ac-challenge-popup-panel{position:relative;width:min(720px,100%);max-height:calc(100svh - 2.5rem);overflow:auto;background:#0b1014;color:#f4f5f2;border:1px solid rgba(131,193,223,.5);box-shadow:0 24px 80px rgba(0,0,0,.52);transform:translateY(18px) scale(.98);transition:transform .3s cubic-bezier(.2,.7,.2,1)}.ac-challenge-popup.is-open .ac-challenge-popup-panel{transform:none}.ac-challenge-popup-panel:after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.22;background-image:linear-gradient(rgba(131,193,223,.18) 1px,transparent 1px),linear-gradient(90deg,rgba(131,193,223,.18) 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(90deg,transparent 8%,#000 100%)}.ac-challenge-popup-close{position:absolute;top:.8rem;right:.8rem;width:42px;height:42px;display:grid;place-items:center;border:1px solid rgba(131,193,223,.45);background:#0b1014;color:#f4f5f2;font-size:1.35rem;line-height:1;cursor:pointer;z-index:2}.ac-challenge-popup-close:hover{background:#83c1df;color:#071017}.ac-challenge-popup-content{position:relative;z-index:1;padding:clamp(2.5rem,7vw,5rem)}.ac-challenge-popup-kicker{margin:0 0 1rem;color:#83c1df;font-size:.68rem;font-weight:700;letter-spacing:.2em;text-transform:uppercase}.ac-challenge-popup h2{max-width:620px;margin:0 0 1.1rem;font:400 clamp(2.5rem,7vw,5.5rem)/.92 Georgia,"Times New Roman",serif;letter-spacing:-.06em}.ac-challenge-popup h2 em{color:#83c1df;font-style:italic}.ac-challenge-popup-copy{max-width:560px;margin:0 0 2rem;color:#b8c6cb;font-size:1.04rem;line-height:1.65}.ac-challenge-popup-cta{display:inline-flex;align-items:center;justify-content:center;gap:.8rem;min-height:50px;padding:1rem 1.3rem;background:#83c1df;color:#071017;font-size:.72rem;font-weight:700;letter-spacing:.13em;text-transform:uppercase;transition:background .22s ease,transform .22s ease}.ac-challenge-popup-cta:hover{background:#b5e1f2;color:#071017;transform:translateY(-2px)}.ac-challenge-popup-note{margin:1rem 0 0;color:#87979d;font-size:.68rem}@media(max-width:600px){.ac-challenge-popup{padding:.75rem}.ac-challenge-popup-panel{max-height:calc(100svh - 1.5rem)}.ac-challenge-popup-content{padding:2.8rem 1.25rem 2rem}.ac-challenge-popup h2{font-size:clamp(2.5rem,13vw,4.2rem)}.ac-challenge-popup-copy{font-size:.94rem}}@media(prefers-reduced-motion:reduce){.ac-challenge-popup,.ac-challenge-popup-panel{transition:none}.ac-challenge-popup-cta:hover{transform:none}}