.btu-intro{padding-bottom:10px}.btu-workbench{grid-template-columns:minmax(0,1.3fr) minmax(340px,.7fr)}.btu-inputs{padding:24px}.btu-guide{border:1px solid #d8d3c6;margin-bottom:22px;padding:18px}.btu-guide p{color:#59645b;margin:12px 0 0;font-size:13px}.room-box{background:linear-gradient(135deg,#f8f5ec 55%,#e4eadf 55%);border:3px solid #23563d;max-width:480px;height:170px;margin:auto;position:relative}.room-box:before{content:"";background:#dcecff;border:3px solid #2760d7;width:22%;height:42%;position:absolute;top:28%;right:12%}.room-box i,.room-box b,.room-box em,.room-box span{color:#174d38;font:700 11px monospace;position:absolute}.room-box i{bottom:8px;left:34%}.room-box b{bottom:35%;right:8px}.room-box em{writing-mode:vertical-rl;top:45%;left:8px}.room-box span{top:18%;right:12%}.btu-fields{grid-template-columns:repeat(2,1fr);gap:12px;display:grid}.btu-fields label{font-size:11px;font-weight:800}.btu-fields label>span{float:right;color:#7c8178;text-transform:uppercase;font:8px monospace}.btu-fields input,.btu-fields select{background:#f8f5ec;border:1px solid #cbc6b9;width:100%;height:48px;margin-top:7px;padding:0 11px;font-weight:700}.btu-live{color:#657067;text-transform:uppercase;margin:22px 0 0;font:10px monospace}.btu-result{border-radius:0;margin:0}.btu-result>strong{font-size:42px}.btu-result>div{padding:14px 0}@media (max-width:1050px){.btu-workbench{grid-template-columns:1fr}}@media (max-width:650px){.btu-fields{grid-template-columns:1fr}.btu-inputs{padding:16px}.btu-intro h1{font-size:36px}}