:root{--ink:#243f3a;--accent:#b75b3b;--paper:#f5f4ee;--line:#dedfd6;--muted:#68766d}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.55 Arial,Helvetica,sans-serif}a{color:inherit;text-underline-offset:3px}header,main,footer{max-width:1250px;margin:auto}header{padding:30px 36px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}header>a:last-child{font-size:11px}.brand{text-decoration:none;font-size:18px;letter-spacing:.4px}.brand small{display:block;font-size:8px;letter-spacing:1.7px;margin-top:4px}main{padding:0 36px}.hero{padding:55px 0 45px;display:grid;grid-template-columns:1.6fr 1fr;gap:40px;align-items:center}.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:bold;color:var(--accent);margin:0 0 18px}h1{font:normal 61px/1.1 Georgia,serif;letter-spacing:-1.8px;margin:0 0 23px}h1 em{font-weight:normal;color:var(--accent)}.hero>div>p:not(.eyebrow){color:var(--muted);line-height:1.8}.badge{display:inline-block;font-size:10px;border-top:1px solid var(--line);padding-top:14px;margin-top:8px}.illustration{color:#7d8e75;text-align:center;border-left:1px solid var(--line);padding:20px}.illustration svg{width:100%;max-height:220px}.illustration span{font-size:8px;letter-spacing:1.7px}.workspace{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(315px,1fr);gap:26px;align-items:start}.panel{background:white;border:1px solid var(--line);padding:26px;margin-bottom:20px}.section-title{display:flex;gap:15px;margin-bottom:22px}.section-title>span{color:var(--accent);font:23px Georgia}.section-title h2{font-size:20px;font-weight:500;margin:0 0 4px}.section-title p{font-size:11px;color:var(--muted);margin:0}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px;margin-top:16px}label{font-size:11px;display:block;min-width:0}input[type=number],select{width:100%;display:block;margin-top:7px;padding:11px 10px;font:14px Arial;color:var(--ink);background:#fafbf8;border:1px solid #cbd2c7;border-radius:2px}select{font-size:12px;min-height:41px}input:focus-visible,select:focus-visible,button:focus-visible,summary:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.single{margin-top:18px}.help{font-size:10px;line-height:1.8;color:var(--muted);margin:14px 0}details{border-bottom:1px solid var(--line);padding:15px 0;font-size:12px}summary{font-size:12px;cursor:pointer;list-style:none;position:relative;padding-right:25px}summary:after{content:'+';position:absolute;right:0;color:var(--accent)}details[open]>summary:after{content:'−'}button{padding:11px 15px;background:#e9eddf;color:var(--ink);border:1px solid #acb7a5;cursor:pointer;font-size:11px}button:disabled{opacity:.4;cursor:default}.part{background:#f6f7f1;border:1px solid var(--line);padding:18px;margin-top:17px}.part-heading{display:flex;justify-content:space-between;gap:12px;align-items:center}.part-heading h3{font-size:14px;font-weight:500;margin:0}.part-heading>span{font:20px Georgia;color:#94a18a}.checkline{display:flex;align-items:flex-start;gap:9px;margin-top:17px;cursor:pointer}input[type=checkbox]{accent-color:var(--ink);width:16px;height:16px;margin:0;flex-shrink:0}.target-fields{border-top:1px solid var(--line);padding-top:14px}.vent-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.vent-grid fieldset{padding:16px 12px;border:1px solid var(--line);margin:0;min-width:0}.vent-grid legend{font-size:12px;padding:0 5px}aside{position:sticky;top:20px}.result{background:var(--ink);color:#f5f4ee;padding:27px}.result>.eyebrow{color:#d3b987;font-size:9px}.result-label{color:#c1cfc3;font-size:12px;margin:28px 0 5px}.amount{font:53px Georgia;letter-spacing:-1px}#specific{font-size:12px;color:#d1debc;margin:9px 0 24px}.range{background:#304d45;padding:13px 12px;font-size:11px;color:#d5dfc9}.result dl{margin:24px 0}.result dl>div{display:flex;justify-content:space-between;gap:12px;margin:15px 0;font-size:11px}.result dt{color:#c2cfc6}.result dd{margin:0;text-align:right;white-space:nowrap}.result-note{font-size:10px;color:#c2cfc6;border-top:1px solid #50665b;padding-top:19px;line-height:1.8}#error:not(:empty){font-size:12px;border-left:2px solid #edb98c;padding-left:10px}.cta{display:block;text-decoration:none;background:#dfeace;color:var(--ink);padding:15px;font-size:12px;margin:23px 0 16px}.actions{display:flex;gap:15px;justify-content:center}.actions button{background:none;border:0;border-bottom:1px solid #a5b5a1;color:#d7e0d0;font-size:10px;padding:4px 0}.tip{background:#eeeee2;border:1px solid var(--line);padding:26px;margin-top:20px}.tip h3{font:25px/1.3 Georgia;margin:12px 0}.tip p:not(.eyebrow){font-size:11px;color:var(--muted);line-height:1.8}.comparison{border-top:1px solid var(--line);padding-top:35px;margin-top:30px}.comparison h2,.knowledge h2{font:36px/1.2 Georgia;margin:0 0 25px}.table-scroll{overflow-x:auto}table{width:100%;border-collapse:collapse;background:white;text-align:left;font-size:12px}th,td{padding:14px 12px;border-bottom:1px solid var(--line)}th{font-weight:normal}thead th{font-size:10px;color:var(--muted)}td{text-align:right;font-variant-numeric:tabular-nums}thead th:not(:first-child){text-align:right}caption{text-align:left;font-size:10px;color:var(--muted);padding:12px 0}.sum{background:#e6ecdc;font-weight:bold}.bar-row{display:flex;align-items:center;gap:15px;margin:12px 0;font-size:11px}.bar-row>span{width:55px}.bar-row>strong{width:75px;text-align:right;font-weight:normal}.bar-track{flex:1;background:#e5e8dd;height:16px}.bar-fill{height:100%;background:#a8b19b}.bar-fill.target{background:#c4cba8}.bar-fill i{display:block;height:100%;background:#547063}.bar-fill.target i{background:#b75b3b}.knowledge{border-top:1px solid var(--line);margin-top:40px;padding:40px 0;display:grid;grid-template-columns:1fr 2fr;gap:40px}.knowledge p,.knowledge li{font-size:11px;color:var(--muted);line-height:1.8}.knowledge li{margin:8px 0}footer{padding:25px 36px;display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);font-size:10px}footer small{display:block;color:var(--muted);font-size:9px}footer>span:last-child{font-size:9px;color:var(--muted)}#print-inputs{display:none}[hidden]{display:none!important}@media(max-width:950px){.workspace{grid-template-columns:minmax(0,1.4fr) minmax(290px,1fr);gap:18px}.panel{padding:20px}.fields,.vent-grid{grid-template-columns:1fr}h1{font-size:50px}.result{padding:23px}}@media(max-width:680px){header{padding:23px 18px;gap:12px}.brand{font-size:14px}.brand small{font-size:6px}header>a:last-child{font-size:9px}main{padding:0 18px}.hero{grid-template-columns:1fr;padding:35px 0 30px}.illustration{display:none}h1{font-size:47px}.workspace{display:block}.panel{padding:22px 17px}.part{padding:16px 13px}aside{position:static}.amount{font-size:51px}.comparison h2,.knowledge h2{font-size:30px}.knowledge{grid-template-columns:1fr;gap:0}.knowledge h2 br{display:none}table{min-width:450px;font-size:11px}th,td{padding:12px 9px}.bar-row{gap:8px}.bar-row>span{width:42px}.bar-row>strong{width:65px}.result dd{white-space:normal}footer{padding:24px 18px;flex-wrap:wrap}}@media print{body{background:white;font-size:10px}header,main,footer{max-width:none}header{padding:10px 0}.hero,form,.tip,.knowledge,footer,.actions,.cta,header>a:last-child{display:none!important}main{padding:0}.workspace{display:block}aside{position:static}.result{background:#eef1e8;color:var(--ink);padding:18px;break-inside:avoid}.result>.eyebrow,.result-label,#specific,.result dt,.result-note{color:var(--ink)}.range{background:#e2e8d9;color:var(--ink)}.amount{font-size:36px}.result dl>div{margin:7px 0}.result-label{margin:12px 0}.comparison{margin-top:20px;padding-top:15px}.comparison h2{font-size:25px}.bars{display:none}table{min-width:0;font-size:10px}thead{display:table-header-group}tr{break-inside:avoid}th,td{padding:8px 5px}.table-scroll{overflow:visible}#print-inputs{display:block;break-before:page}#print-inputs h3{font:22px Georgia}#print-inputs dl>div{display:flex;justify-content:space-between;gap:15px;margin:5px 0;font-size:10px}#print-inputs dd{margin:0;text-align:right}.help{font-size:9px}}
