:root{font-family:Arial,"Helvetica Neue",sans-serif;color:#172333;background:#f2f4f7;font-synthesis:none;--ink:#15283b;--red:#be302f;--muted:#526273;--line:#dce2e8}*{box-sizing:border-box}body{margin:0;font-size:16px;line-height:1.5}button,input,select{font:inherit}button,summary{cursor:pointer}button{transition:background .15s}button:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid #2c6aa9;outline-offset:3px}input:focus,select:focus{outline:2px solid #2c6aa9;outline-offset:1px}header{background:var(--ink);color:white;padding:24px max(4vw,24px);display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-size:24px;font-weight:800;letter-spacing:.07em;color:white;text-decoration:none}.brand span{display:block;font-size:12px;letter-spacing:.14em;font-weight:400;margin-top:3px}.header-right{font-size:14px}.edition{border:1px solid #667586;padding:6px 10px;margin-left:24px;border-radius:3px}main{max-width:1460px;margin:auto;padding:42px max(4vw,24px)}.title-row{display:flex;align-items:flex-end;justify-content:space-between;gap:36px;padding-bottom:30px}.eyebrow{font-size:12px;font-weight:700;letter-spacing:.15em;color:var(--muted);margin:0 0 10px}h1{font-size:clamp(28px,3.2vw,42px);line-height:1.22;letter-spacing:-.025em;font-weight:600;margin:0}h2{font-size:24px;line-height:1.3;margin:0}h3{margin:0 0 8px;font-size:21px}.intro{color:var(--muted);margin:0;padding-bottom:3px}.tabs{display:flex;border-bottom:1px solid var(--line);margin-bottom:28px;gap:30px}.tabs button{border:0;background:none;color:var(--muted);padding:13px 0;font-size:16px;border-bottom:3px solid transparent}.tabs button.active{color:var(--red);border-bottom-color:var(--red);font-weight:700}.workspace{display:grid;grid-template-columns:340px minmax(0,1fr);gap:32px;align-items:start}aside{background:white;border:1px solid var(--line);padding:25px;border-radius:6px}.step-label{font-size:13px;color:var(--red);font-weight:700;display:flex;align-items:center;gap:9px;flex-wrap:wrap}.step-label span{color:var(--ink);font-size:16px}.step-label small{color:var(--muted);font-size:12px;font-weight:400;margin-left:auto}label{display:block;font-size:14px;font-weight:600;margin:20px 0 7px}label span{color:var(--muted);font-size:12px;font-weight:400}input,select{background:white;color:var(--ink);border:1px solid #b8c3cd;border-radius:4px;width:100%;min-height:44px;padding:10px 12px;min-width:0}#capacity{font-size:30px;font-weight:600;letter-spacing:-.02em;height:64px}.chips{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}.chips button{background:#f3f5f7;border:1px solid var(--line);border-radius:3px;padding:5px 8px;font-size:13px;min-height:34px}.chips button:hover{background:#e3e9ef}.section-divider{border-top:1px solid var(--line);margin:25px 0}.helper{font-size:13px;color:var(--muted);margin:10px 0 0}.field-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.field-pair label{font-size:13px}.primary{background:var(--red);color:white;border:0;border-radius:4px;padding:13px 16px;width:100%;margin-top:24px;font-weight:600;display:flex;justify-content:space-between;gap:12px}.primary:hover{background:#a62224}.primary:disabled{background:#7c8894;cursor:wait}.reset{display:block;border:0;background:none;color:var(--muted);font-size:14px;margin:12px auto 0;padding:7px 20px}summary{font-size:14px;font-weight:600;min-height:42px;padding:12px 0}#advanced{margin-top:16px;border-top:1px solid var(--line)}.results-heading{display:flex;justify-content:space-between;align-items:center;gap:20px}.results-heading .eyebrow{margin-bottom:7px}.results #status{font-size:14px;color:var(--muted);margin:14px 0 24px}#result-count{font-size:36px;color:var(--red);line-height:1}.empty{background:#e7ecf1;padding:38px;border-radius:6px;min-height:260px}.empty p{color:var(--muted);max-width:550px}.large-number{display:block;font-size:64px;font-weight:400;letter-spacing:-.06em;color:#788b9d;margin-bottom:12px}.card{background:white;border:1px solid var(--line);border-radius:6px;margin-bottom:18px;overflow:hidden}.card-head{padding:22px 24px 16px;display:flex;justify-content:space-between;gap:20px;align-items:start}.card-head h3{font-size:23px;letter-spacing:-.025em}.card-head p{margin:3px 0;color:var(--muted);font-size:14px}.tag{font-size:12px;padding:5px 8px;white-space:nowrap;background:#e9f0f5;color:#254763;border-radius:3px}.dimensions{display:grid;grid-template-columns:repeat(4,1fr);padding:0 24px 22px;gap:16px}.dimension span{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}.dimension strong{font-size:24px;font-weight:500;letter-spacing:-.03em}.dimension small{display:block;font-size:12px;color:var(--muted)}.card-bottom{padding:12px 24px;background:#f8fafb;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:16px;color:var(--muted);font-size:13px}.text-button{border:0;background:none;color:var(--red);font-weight:600;padding:7px 0;font-size:14px}.card details{padding:0 24px}.spec-table{width:100%;border-collapse:collapse;font-size:14px;margin:6px 0 18px}.spec-table th,.spec-table td{text-align:left;padding:9px 0;border-bottom:1px solid #edf0f3}.spec-table th{font-weight:400;color:var(--muted);width:58%}.source{font-size:12px;overflow-wrap:anywhere;color:var(--muted);margin-bottom:20px}.method{margin:24px 0;color:var(--muted);font-size:14px;border-top:1px solid var(--line)}.method p{margin-top:8px}footer{border-top:1px solid var(--line);margin-top:35px;padding:24px 0;font-size:13px;color:var(--muted)}footer strong{font-size:14px;color:var(--ink)}footer p{max-width:1050px;margin:8px 0}.error{color:#a72225;font-size:14px}.warning{padding:18px;background:#fff3db;border-left:3px solid #a66b08;font-size:14px;color:#654208;margin:18px 0}.check-heading{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:24px}.check-heading p{color:var(--muted);font-size:14px}.check-heading label{min-width:260px;margin:0}.technical-error{padding:16px;background:#fff0ee;margin-bottom:12px;font-size:14px}.technical-error code{font-size:12px;color:var(--muted)}#technical-fields label:first-child{margin-top:0}#excluded details{font-size:14px;color:var(--muted)}#excluded li{margin:8px 0}[hidden]{display:none!important}@media(max-width:1050px){.workspace{grid-template-columns:300px minmax(0,1fr);gap:20px}.dimensions{grid-template-columns:1fr 1fr}.intro{display:none}}@media(max-width:740px){header{padding:18px 20px}.header-right{font-size:12px;text-align:right}.edition{display:none}main{padding:26px 18px}.workspace{grid-template-columns:1fr}.title-row{padding-bottom:24px}h1{font-size:29px}.tabs{gap:22px}.tabs button{font-size:14px}.results{min-width:0;margin-top:8px}aside{padding:22px}.check-heading{display:block}.check-heading label{margin-top:20px}.card-head{padding:20px;flex-wrap:wrap;gap:8px}.dimensions{padding:0 20px 20px}.card-bottom{padding:12px 20px;align-items:start;flex-direction:column}.empty{padding:26px}.brand{font-size:21px}.brand span{font-size:10px}}@media print{header,.tabs,aside,.title-row,.text-button,.method,#excluded,.check-heading{display:none}.workspace{display:block}main{padding:0}.card{break-inside:avoid}body{background:white}.card details{display:none}}

.area-band{margin:0 24px 20px;padding:16px;background:#edf4f9;border-left:3px solid #30688f;font-size:14px}.area-band strong,.area-band span,.area-band small{display:block}.area-band strong{font-size:16px}.area-band span{margin:5px 0}.area-band small{color:var(--muted);font-size:12px}.area-fail{background:#fff0ee;border-color:#be302f}a{color:#24628f}

.cad-dialog{width:min(1100px,94vw);max-height:92vh;border:1px solid #bac8d4;border-radius:12px;padding:24px;color:#14283c;overflow:auto}.cad-dialog::backdrop{background:#14283c99}.cad-dialog p{font-size:14px;line-height:1.5}.cad-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.cad-toolbar h2{margin:0}.cad-toolbar button{padding:10px 16px;border-radius:6px;border:1px solid #345772;background:white;color:#14283c;cursor:pointer}.cad-toolbar [data-download]{background:#173f5a;color:white}.cad-preview{border:1px solid #d8e1e8;overflow:auto;background:white;margin:16px 0}.cad-preview svg{display:block;width:100%;min-width:650px}.cad-status,.cad-note{font-size:14px;color:#455b70}.card-bottom{flex-wrap:wrap}
.cad-geometry-form{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin:16px 0;padding:16px;background:#f0f5f8}.cad-geometry-form[hidden]{display:none}.cad-geometry-form p{grid-column:1/-1;margin:0}.cad-geometry-form label{font-size:14px;display:grid;gap:6px}.cad-geometry-form input{width:100%;padding:8px;border:1px solid #b5c5d0;border-radius:4px}.cad-geometry-form button{align-self:end;padding:10px}.cad-error{color:#aa2626}.cad-toolbar button:disabled{opacity:.45;cursor:not-allowed}

.cad-kind{display:flex;align-items:center;gap:12px;margin:18px 0}.cad-kind select{padding:10px;border:1px solid #b5c5d0;border-radius:5px;background:white}.cad-geometry-form fieldset{display:contents;border:0;padding:0;margin:0}.cad-geometry-form fieldset[hidden]{display:none}.cad-floor-options{grid-column:1/-1}.cad-floor-options summary{cursor:pointer}.cad-floor-options label{margin-top:12px}.cad-floor-options small{display:block;margin-top:6px;color:#455b70}.cad-summary{padding:10px;background:#edf7f2}.cad-summary:empty{display:none}

.en81-option{padding:14px 18px;margin-bottom:18px;border:1px solid #ccd9e2;border-radius:8px;background:#f0f5f8}.en81-option label{display:flex;align-items:center;gap:10px;margin:0;font-weight:600}.en81-option input{width:18px;height:18px;margin:0;accent-color:#173f5a}.en81-option p{margin:6px 0 0 28px;font-size:13px;color:#455b70}

/* Compact engineering workspace; supporting explanations are on demand. */
header{padding:16px max(4vw,24px)}main{padding-top:24px}.title-row{align-items:center;padding-bottom:18px;gap:16px}h1{font-size:28px}.tool-options{display:flex;align-items:center;gap:20px}.tool-options label{display:flex;align-items:center;gap:8px;margin:0;white-space:nowrap}.tool-options input{width:18px;min-height:18px;height:18px;padding:0;accent-color:var(--red)}.info-button{border:1px solid var(--line);border-radius:5px;background:white;padding:9px 12px;color:var(--ink);font-size:14px}.tabs{margin-bottom:20px}#search-form>label:first-child{margin-top:0}.area-band{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;padding:10px 14px;margin-bottom:14px}.area-band span{margin:0}.area-band details{padding:0;margin-left:auto}.area-band summary{min-height:0;padding:0;font-weight:400}.area-band details[open]{flex-basis:100%;margin:0}.area-band p{margin:8px 0 0}.card-head{padding-top:18px;padding-bottom:12px}.card-head h3{font-size:21px}.results #status{margin:8px 0 16px}.info-dialog{width:min(760px,92vw);max-height:88vh;border:1px solid var(--line);border-radius:10px;padding:24px;color:var(--ink);line-height:1.6}.info-dialog::backdrop{background:#14283c88}.info-dialog h3{margin-top:24px}.info-dialog p{font-size:16px}.usage-notes{border-top:1px solid var(--line);margin-top:20px;padding-top:20px}.cad-help{color:var(--muted);border-bottom:1px solid var(--line)}.cad-help p{overflow-wrap:anywhere}.cad-geometry-form label{margin-top:0}.cad-error:empty{display:none}.cad-kind{margin-bottom:4px}
@media(max-width:740px){.title-row{align-items:start;flex-direction:column;gap:12px}.tool-options{width:100%;justify-content:space-between}.brand{font-size:20px}.tabs{gap:22px}.info-dialog{padding:20px}.area-band{margin-left:20px;margin-right:20px}}

.parameter-menu{margin-top:18px;border:1px solid var(--line);border-radius:6px;padding:0 16px 16px}.parameter-menu>summary{font-size:16px}.parameter-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px 18px}.parameter-grid label{margin-top:10px}#technical-fields{padding-bottom:12px}.parameter-menu details{border-top:1px solid var(--line);margin-top:14px}.site-constraints{color:var(--muted)}.site-constraints:empty{display:none}
@media(max-width:740px){.parameter-grid{grid-template-columns:1fr 1fr}.cad-dialog{padding:16px}.cad-geometry-form{grid-template-columns:1fr}.parameter-menu{padding:0 12px 12px}}