/* Three practical HVAC guides, October 29, 2026. */
.guide-answer{border-left:5px solid #146277;background:#edf5f7;padding:22px 24px;margin:0 0 28px;border-radius:0 6px 6px 0}
.guide-answer h2{font-size:23px;margin:0 0 10px}.guide-answer p:last-child{margin-bottom:0}
.guide-toc{border-block:1px solid #d5e1e5;padding:18px 0;margin:26px 0 38px}.guide-toc p{margin:0 0 8px;font-size:15px;font-weight:700}.guide-toc ul{display:flex;flex-wrap:wrap;gap:8px 24px;list-style:none;padding:0;margin:0}.guide-toc li{font-size:15px}.guide-toc a{display:inline-block;padding-block:4px}
.guide-patterns{margin:22px 0 30px}.guide-patterns dt{font-size:18px;font-weight:700;line-height:1.5;margin-top:22px;padding-top:18px;border-top:1px solid #d5e1e5}.guide-patterns dd{margin:6px 0 0;font-size:17px;line-height:1.75}
.guide-notes{background:#f5f7f7;border:1px solid #d5e1e5;border-radius:6px;padding:20px 24px 20px 44px}.guide-notes li{margin-block:7px}
.guide-source-note{font-size:14px!important;color:#43565e!important;border-top:1px solid #d5e1e5;padding-top:20px;margin-top:36px}
.chat-button{position:static;display:inline-block;margin:12px 0 0}
@media(max-width:700px){.guide-answer{padding:18px}.guide-answer h2{font-size:22px}.guide-patterns dt{font-size:17px}.guide-patterns dd{font-size:16px}.guide-toc ul{display:block}.guide-toc li{margin-block:3px}}