.back-link{display:block;color:var(--muted);font-size:14px;margin-bottom:30px}.vent-hero h1{font-size:clamp(44px,5.2vw,80px);line-height:1.06}.lead{font-size:23px;line-height:1.6;color:var(--muted);max-width:840px;margin:25px 0 40px}.vent-hero img{width:100%;height:auto;display:block}.vent-light{background:var(--cream);color:var(--ink)}.vent-light .eyebrow{color:#886031}.vent-two{display:grid;grid-template-columns:1fr 1fr;gap:80px}.vent-two p{font-size:19px;line-height:1.7;margin:0 0 22px;color:var(--muted)}.vent-light p{color:#52616b}.vent-two .eyebrow{font-size:13px}.vent-two h2,.vent-light h2{font-size:clamp(32px,3.3vw,48px);line-height:1.13}.control-flow{list-style:none;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:38px;margin:50px 0 32px}.control-flow li{position:relative;border-top:1px solid var(--gold);padding-top:20px}.step-number{font-size:13px;color:var(--gold)}.control-flow h3{font-size:24px;margin:18px 0 12px}.control-flow p{font-size:16px;line-height:1.65;color:var(--muted)}.flow-arrow{position:absolute;right:-27px;top:20px;color:var(--gold);font-size:21px}.flow-note,.small-note{font-size:14px;line-height:1.7;color:var(--muted);max-width:800px}.retrofit-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;margin:40px 0 25px}.retrofit-grid article{border-top:1px solid #142c3940;padding-top:25px}.retrofit-grid h3{font-size:24px}.retrofit-grid ul{padding-left:20px;font-size:18px;line-height:1.7;margin-top:18px}.retrofit-grid li{margin:10px 0}@media(max-width:900px){.control-flow{grid-template-columns:1fr;gap:30px}.control-flow li{padding-left:48px;padding-top:18px}.step-number{position:absolute;left:0;top:23px}.control-flow h3{margin:0 0 8px}.flow-arrow{right:auto;left:0;top:65px;transform:rotate(90deg)}.vent-two,.retrofit-grid{grid-template-columns:1fr;gap:28px}}@media(max-width:760px){.lead{font-size:20px}.vent-two p{font-size:17px}.retrofit-grid ul{font-size:17px}}
/* Expanded answers belong to this light section. */
.vent-light .faq details p{color:#52616b}.vent-light .faq details{border-color:#142c3926}