#st334Content:has(#stairs429)>.st-master-intro{display:none}
#stairs429{--ink:#092866;--text:#425e86;--muted:#667fa0;--line:#ccdef4;--paper:#fff;--soft:#f5f9ff;--blue:#0768ff;--green:#e2fbee;--green-line:#b2ebd2;color:var(--text);background:var(--paper);font:14px/1.5 Arial,sans-serif}
#stairs429 *{box-sizing:border-box}#stairs429 [hidden]{display:none!important}#stairs429 h2,#stairs429 h3{color:var(--ink);line-height:1.3;letter-spacing:-.4px;margin:0 0 12px}#stairs429 h2{font-size:20px}#stairs429 h3{font-size:15px}#stairs429 p{margin:8px 0 12px}#stairs429 .intro{font-size:19px;margin:0 0 16px}#stairs429 a{color:var(--blue);text-decoration:none}#stairs429 a:hover{text-decoration:underline}#stairs429 .hint{font-size:11px;line-height:1.55;color:var(--muted)}#stairs429 button,#stairs429 input,#stairs429 select{font:inherit;touch-action:manipulation}#stairs429 button{color:var(--blue);background:var(--paper);border:1px solid #91baf2;border-radius:4px;padding:10px 14px;line-height:1.35;cursor:pointer}#stairs429 button:hover{background:var(--soft);border-color:var(--blue)}#stairs429 button.primary{color:#fff;background:#0768ff;border-color:#0768ff}#stairs429 button:disabled,#stairs429 input:disabled{opacity:.5;cursor:not-allowed}#stairs429 button:focus-visible,#stairs429 select:focus-visible,#stairs429 input:focus-visible,#stairs429 a:focus-visible,#stairs429 summary:focus-visible,#stairs429 .error:focus-visible{outline:3px solid #88b9ff;outline-offset:3px}#stairs429 [id],#stairs429 button,#stairs429 summary{scroll-margin-top:165px}#stairs429 .panel{border:1px solid var(--line);background:var(--paper);border-radius:5px;padding:17px;min-width:0}#stairs429 input,#stairs429 select{width:100%;min-width:0;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:4px;padding:9px 10px;font-size:13px;line-height:1.35}#stairs429 select{padding-right:24px}
/* Compact profile standard retained from W428: 116px desktop. */
#stairs429 .modes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:16px}#stairs429 .mode{display:flex;align-items:center;gap:12px;min-width:0;height:116px;padding:8px 12px;text-align:left;border-color:var(--line);color:var(--ink);overflow:hidden}#stairs429 .mode.selected{border-color:#0768ff;box-shadow:inset 0 0 0 1px #0768ff;background:#f3f8ff}#stairs429 .stairs-art{display:block;width:112px;height:92px;flex:0 0 112px;overflow:hidden}#stairs429 .mode>span{min-width:0}#stairs429 .mode b{font-size:15px;line-height:1.3;display:block}#stairs429 .mode small{font-size:11px;line-height:1.4;display:block;margin-top:5px;color:var(--text)}
#stairs429 .main-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:stretch}#stairs429 .field{display:grid;grid-template-columns:30% minmax(0,1fr);gap:12px;align-items:center;margin-bottom:12px}#stairs429 .field label{font-size:12px}#stairs429 .field>div{min-width:0}#stairs429 .unit-row{display:flex;gap:8px}#stairs429 .unit-row>input{min-width:0;flex:1}#stairs429 .units{display:flex;flex:0 0 116px;gap:4px;padding:3px;border:1px solid var(--line);border-radius:4px}#stairs429 .units button{border:0;font-size:12px;line-height:1.2;padding:4px 10px;flex:1}#stairs429 .units button.selected{background:#0768ff;color:#fff}#stairs429 summary{cursor:pointer;color:var(--ink);font-size:12px;line-height:1.5}#stairs429 .assumptions{border:1px solid var(--line);background:var(--soft);border-radius:4px;margin-top:4px;padding:10px 12px}#stairs429 .assumptions summary{color:var(--blue);font-weight:bold}#stairs429 .assumptions summary>span{display:block;font-size:11px;color:var(--text);font-weight:normal;margin:3px 0 0 12px}#stairs429 .assumption-body{padding-top:14px}#stairs429 .assumption-body .field{grid-template-columns:42% minmax(0,1fr);gap:8px}#stairs429 .assumption-body button{font-size:11px;padding:8px 10px}#stairs429 .assumption-body .hint{font-size:10px;margin-bottom:0}#stairs429 .text-button{background:transparent;border:0;font-size:11px;padding:10px 0 0;text-align:left}#stairs429 .form-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:12px 0}#stairs429 .form-actions button{font-size:12px}#stairs429 .error:empty{margin:0}#stairs429 .error:not(:empty){padding:10px;border:1px solid currentColor;border-radius:4px;color:#af233a;font-size:12px}#stairs429 .input-panel{display:flex;flex-direction:column}#stairs429 .athlete-photo{position:relative;line-height:0;width:100%;margin:auto 0 0;overflow:hidden;border-radius:4px;background:#e9edf0}#stairs429 .athlete{display:block;width:100%;height:auto;aspect-ratio:4/3;object-fit:cover}#stairs429 .watermark{position:absolute;right:10px;bottom:10px;width:96px;max-width:24%;height:auto;opacity:.4;filter:drop-shadow(0 1px 1px #253848);pointer-events:none}
#stairs429 .right-column{display:flex;flex-direction:column;gap:12px;min-width:0}#stairs429 .dashboard[aria-disabled=true]{opacity:.6}#stairs429 .result{background:var(--green);border:1px solid var(--green-line);border-radius:4px;text-align:center;color:var(--ink);padding:15px 12px 12px}#stairs429 .result>b{font-size:12px;display:block}#stairs429 .result>strong{display:block;font-size:58px;line-height:1.1;letter-spacing:-1.7px;margin:8px 0;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}#stairs429 .result>strong small{font-size:.5em;letter-spacing:-.5px}#stairs429 .result>p{font-size:11px;margin:0}#stairs429 .metrics{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}#stairs429 .metrics>div{border:1px solid var(--line);padding:12px;border-radius:4px;min-width:0}#stairs429 .metrics b{display:block;color:var(--ink);font-size:12px}#stairs429 .metrics strong{display:block;color:var(--ink);font-size:27px;line-height:1.3;margin:4px 0;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}#stairs429 .metrics small{font-size:11px;display:block}#stairs429 .split{display:flex;min-height:44px;border-radius:4px;overflow:hidden;background:var(--soft);margin-top:12px;color:#fff}#stairs429 .split>span{display:flex;flex-direction:column;align-items:center;justify-content:center;min-width:0;padding:6px 2px;font-size:11px;overflow-wrap:anywhere;text-align:center}#stairs429 .split b{font-size:11px;font-weight:normal}#stairs429 .up-bar{background:#0768ff}#stairs429 .down-bar{background:#3979b9}#stairs429 .small-note{margin:6px 0 0}#stairs429 .milestone{margin-top:auto}#stairs429 .milestone>div{display:flex;align-items:center;gap:16px;min-width:0}#stairs429 .milestone .building-art{width:43%;height:210px;flex:0 0 43%}#stairs429 .milestone>div>div{min-width:0;flex:1}#stairs429 .milestone strong{display:block;font-size:33px;color:var(--ink);line-height:1.2;letter-spacing:-.6px;overflow-wrap:anywhere}#stairs429 .milestone b{display:block;color:var(--ink);font-size:21px;line-height:1.3;margin-top:8px;overflow-wrap:anywhere}#stairs429 .milestone p{font-size:11px;line-height:1.6;margin:8px 0 0}#stairs429 .milestone>.hint{font-size:9px;text-align:right}
#stairs429 .export-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:12px 0 0}#stairs429 .export-actions button{width:100%;font-size:13px}#stairs429 .export-status{font-size:11px;margin:6px 0 0}#stairs429 .export-status:empty{margin:0}#stairs429 .explorer{margin-top:14px}#stairs429 .explorer-grid{display:grid;grid-template-columns:34% minmax(0,1fr);align-items:center;gap:16px}#stairs429 .explorer h3{font-size:15px}#stairs429 .explorer p{font-size:12px;line-height:1.6;margin-bottom:0}#stairs429 .stair-visual{position:relative;min-width:0;min-height:190px;line-height:0}#stairs429 .stair-visual>img{display:block;width:100%;height:210px;object-fit:contain}#stairs429 .path-overlay{position:absolute;left:6%;top:0;width:88%;height:85%;overflow:visible}#stairs429 .explorer-label{position:absolute;top:35%;color:var(--blue);font-size:12px;line-height:1.4;font-weight:bold;text-align:center;text-shadow:0 0 5px var(--paper)}#stairs429 .up-label{left:0}#stairs429 .down-label{right:0;color:var(--text)}#stairs429 .explorer-label strong{display:block;font-size:18px}#stairs429 .stair-visual>small{display:block;text-align:right;line-height:1.5;font-size:9px;color:var(--muted);margin-top:3px}
#stairs429 .lower-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:14px}#stairs429 .lower-grid p{font-size:12px;line-height:1.65}#stairs429 .formulas{margin:0;font-size:12px}#stairs429 .formulas>div{display:grid;grid-template-columns:110px minmax(0,1fr);gap:10px;margin:7px 0}#stairs429 .formulas dt{color:var(--ink)}#stairs429 .formulas dd{margin:0}#stairs429 .preset-list{border-top:1px solid var(--line);padding-top:10px}#stairs429 .preset-list p{font-size:11px}#stairs429 .faq{margin-top:14px}#stairs429 .faq details{border:1px solid var(--line);border-radius:4px;padding:9px 12px;margin:8px 0 0}#stairs429 .faq p{font-size:12px;line-height:1.7;margin-bottom:0}#stairs429 .sources{margin-top:14px}#stairs429 .source-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}#stairs429 .source-grid>a{display:flex;gap:12px;align-items:center;border:1px solid var(--line);border-radius:4px;padding:12px;min-width:0;text-decoration:none}#stairs429 .source-grid>a:hover{background:var(--soft);border-color:var(--blue)}#stairs429 .source-logo{display:flex;align-items:center;justify-content:center;flex:0 0 100px;min-height:60px;padding-right:12px;border-right:1px solid var(--line);color:var(--ink);text-align:center}#stairs429 .source-grid b{font-size:12px;color:var(--ink);display:block}#stairs429 .source-grid small{font-size:10px;color:var(--text);display:block;line-height:1.55;margin-top:4px}#stairs429 .compendium-wordmark{display:block;font:bold 12px/1.3 Georgia,serif;padding-top:10px}#stairs429 .compendium-wordmark small{font:9px/1.3 Arial,sans-serif;color:var(--text);margin-top:3px}#stairs429 .journal-wordmark{display:block;font:bold 24px/1.1 Arial,sans-serif;padding-top:5px;letter-spacing:1px}#stairs429 .journal-wordmark small{font:8px/1.4 Arial,sans-serif;letter-spacing:0}#stairs429 .small-print{font-size:10px;line-height:1.6;color:var(--muted);margin:10px 0 0}
#stairs429 .related{padding:14px 0 20px}#stairs429 .related-heading{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:15px}#stairs429 .related-heading h2{font-size:25px;margin:0}#stairs429 .related-heading>a{font-size:12px;white-space:nowrap}#stairs429 .related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}#stairs429 .related-grid>a{display:flex;align-items:center;gap:14px;padding:14px;min-height:120px;border:1px solid var(--line);border-radius:5px;text-decoration:none;min-width:0}#stairs429 .related-grid>a:hover{border-color:var(--blue);background:var(--soft)}#stairs429 .related-grid .stairs-art{width:105px;flex-basis:105px;height:80px}#stairs429 .related-grid b{display:block;color:var(--ink);font-size:15px;line-height:1.4}#stairs429 .related-grid small{display:block;color:var(--text);font-size:12px;line-height:1.5;margin-top:5px}#stairs429 .sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
html.st-master-dark #stairs429{--ink:#e9f2ff;--text:#c3d3e9;--muted:#a3b7d1;--line:#365371;--paper:#102235;--soft:#172d44;--blue:#83baff;--green:#153f30;--green-line:#3c7158;color-scheme:dark}html.st-master-dark #stairs429 .mode.selected{background:#17334f}html.st-master-dark #stairs429 .error:not(:empty){color:#ffb3c1}html.st-master-dark #stairs429 .stairs-art{filter:brightness(1.13) drop-shadow(0 0 .4px #c9def2)}
@media(max-width:1100px){#stairs429 .mode{gap:8px;padding:8px}#stairs429 .mode .stairs-art{width:90px;flex-basis:90px;height:88px}#stairs429 .mode b{font-size:14px}#stairs429 .mode small{font-size:10px}#stairs429 .panel{padding:15px}#stairs429 .field{gap:9px}#stairs429 .units{flex-basis:100px}#stairs429 .units button{padding:4px 7px}#stairs429 .metrics strong{font-size:24px}#stairs429 .milestone strong{font-size:28px}#stairs429 .milestone b{font-size:18px}#stairs429 .milestone .building-art{height:190px}#stairs429 .source-logo{flex-basis:80px;padding-right:8px}#stairs429 .compendium-wordmark{font-size:10px}#stairs429 .source-grid>a{padding:10px;gap:9px}#stairs429 .source-grid b{font-size:11px}#stairs429 .source-grid small{font-size:9px}#stairs429 .related-grid>a{padding:12px;gap:10px}#stairs429 .related-grid .stairs-art{width:86px;flex-basis:86px;height:76px}}
@media(max-width:820px){#stairs429 .main-grid{grid-template-columns:1fr}#stairs429 .mode{gap:6px;padding:7px}#stairs429 .mode .stairs-art{width:70px;flex-basis:70px;height:80px}#stairs429 .mode b{font-size:13px}#stairs429 .mode small{font-size:10px}#stairs429 .athlete-photo{max-width:530px;margin:0 auto}#stairs429 .source-grid,#stairs429 .related-grid{grid-template-columns:1fr}#stairs429 .source-logo{flex-basis:110px}#stairs429 .source-grid b{font-size:13px}#stairs429 .source-grid small{font-size:11px}#stairs429 .compendium-wordmark{font-size:12px}#stairs429 .compendium-wordmark small{font-size:9px}#stairs429 .journal-wordmark small{font-size:8px}#stairs429 .related-grid>a{min-height:110px;padding:14px;gap:20px}#stairs429 .related-grid .stairs-art{width:110px;flex-basis:110px;height:80px}#stairs429 .related-grid b{font-size:16px}#stairs429 .lower-grid{grid-template-columns:1fr}#stairs429 .milestone .building-art{height:200px}#stairs429 .explorer-grid{grid-template-columns:1fr}#stairs429 .explorer h3{margin-bottom:7px}}
@media(max-width:540px){#stairs429 .intro{font-size:15px}#stairs429 .modes{gap:7px}#stairs429 .mode{flex-direction:column;height:154px;gap:4px;padding:6px 4px;text-align:center;justify-content:flex-start}#stairs429 .mode .stairs-art{width:80px;height:66px;flex:0 0 66px}#stairs429 .mode b{font-size:12px}#stairs429 .mode small{font-size:10px;line-height:1.4;margin-top:4px}#stairs429 .panel{padding:13px}#stairs429 h2{font-size:19px}#stairs429 .field{gap:8px;grid-template-columns:33% minmax(0,1fr)}#stairs429 .field label{font-size:11px}#stairs429 input,#stairs429 select{font-size:12px;padding:9px 7px}#stairs429 .unit-row{gap:5px}#stairs429 .units{flex-basis:82px;gap:1px}#stairs429 .units button{font-size:10px;padding:5px}#stairs429 .result>strong{font-size:48px}#stairs429 .metrics{gap:8px}#stairs429 .metrics>div{padding:10px}#stairs429 .metrics strong{font-size:25px}#stairs429 .metrics b{font-size:11px}#stairs429 .metrics small{font-size:10px}#stairs429 .split b,#stairs429 .split span{font-size:10px}#stairs429 .milestone>div{gap:12px}#stairs429 .milestone .building-art{height:180px}#stairs429 .milestone strong{font-size:27px}#stairs429 .milestone b{font-size:18px}#stairs429 .milestone p{font-size:10px}#stairs429 .watermark{width:84px;right:8px;bottom:8px}#stairs429 .export-actions{gap:8px}#stairs429 .export-actions button{font-size:12px;padding:11px 7px}#stairs429 .related-heading{flex-direction:column;align-items:flex-start;gap:7px}#stairs429 .related-heading h2{font-size:23px}#stairs429 .formulas>div{grid-template-columns:92px minmax(0,1fr);gap:8px;font-size:11px}#stairs429 .stair-visual>img{height:180px}#stairs429 .explorer-label strong{font-size:16px}#stairs429 .explorer-label{font-size:11px}}

/* W427 reference notice standard: consistent composition; topic-specific copy only.
   Source attribution does not imply certification, endorsement or clinical review. */
#stairs429 .st-reference-notice{--ref-shield-paper:#f5faff;--ref-shield-inner:#e1efff;--ref-shield-layer:#cde4fb;display:grid;grid-template-columns:minmax(0,1fr) 205px;gap:20px;align-items:center;padding:16px 20px;border:1px solid var(--line);border-radius:8px;background:linear-gradient(105deg,#f8fafc,#eff6ff);margin-bottom:14px}
#stairs429 .st-reference-copy{min-width:0}
#stairs429 .st-reference-notice h2{font-size:17px;line-height:1.35;margin:0 0 6px;letter-spacing:-.2px}
#stairs429 .st-reference-notice p{font-size:12px;line-height:1.6;margin:0}
#stairs429 .st-reference-notice .reference-disclaimer{margin-top:5px;font-size:11px}
#stairs429 .st-reference-link{display:inline-block;margin-top:7px;font-size:12px;line-height:1.5}
#stairs429 .st-reference-seal{align-self:stretch;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding-left:20px;border-left:1px solid var(--line);color:var(--ink)}
#stairs429 .st-reference-shield{display:block;width:64px;height:72px;flex:none;margin:0 0 6px}
#stairs429 .st-reference-seal b{font-size:10px;line-height:1.4;letter-spacing:.15px}
#stairs429 .st-reference-seal small{display:block;font-size:9px;line-height:1.5;margin-top:4px;color:var(--muted)}
html.st-master-dark #stairs429 .st-reference-notice{--ref-shield-paper:#17334f;--ref-shield-inner:#234b70;--ref-shield-layer:#305b81;background:linear-gradient(105deg,#142a41,#193652)}
@media(max-width:820px){#stairs429 .st-reference-notice{grid-template-columns:minmax(0,1fr) 165px;gap:14px;padding:14px 16px}#stairs429 .st-reference-seal{padding-left:14px}}
@media(max-width:540px){#stairs429 .st-reference-notice{grid-template-columns:minmax(0,1fr) 102px;gap:10px;padding:12px}#stairs429 .st-reference-notice h2{font-size:14px}#stairs429 .st-reference-notice p{font-size:11px}#stairs429 .st-reference-notice .reference-disclaimer{font-size:10px}#stairs429 .st-reference-seal{padding-left:10px}#stairs429 .st-reference-shield{width:47px;height:53px}#stairs429 .st-reference-seal b{font-size:8px;letter-spacing:0}#stairs429 .st-reference-seal small{font-size:8px}#stairs429 .st-reference-link{font-size:11px}}

/* W430: match the approved artwork proportions and original deep navy headings.
   Applied to this calculator only. Calculation and reference-notice styles stay intact. */
#st334Content:has(#stairs429)>h1,#stairs429 h2,#stairs429 h3{color:#000066}
html.st-master-dark #st334Content:has(#stairs429)>h1,html.st-master-dark #stairs429 h2,html.st-master-dark #stairs429 h3{color:#e9f2ff}
#stairs429 .down-bar{background:#77b6ff;color:#000066}
#stairs429 .milestone .building-art{object-fit:contain;object-position:center}
#stairs429 .stair-visual{height:215px;min-height:215px}
#stairs429 .stair-visual>img{position:absolute;left:10%;top:8px;width:80%;height:185px;object-fit:contain}
#stairs429 .path-overlay{left:10%;top:8px;width:80%;height:185px}
#stairs429 .explorer-label{top:30%}
#stairs429 .stair-visual>small{position:absolute;right:0;bottom:0;margin:0}
@media(max-width:540px){#stairs429 .stair-visual{height:185px;min-height:185px}#stairs429 .stair-visual>img,#stairs429 .path-overlay{left:12%;top:8px;width:76%;height:155px}#stairs429 .explorer-label{top:29%;font-size:10px}#stairs429 .explorer-label strong{font-size:14px}}

#stairs429 .stair-artwork{position:absolute;left:12%;top:46%;width:76%;transform:translateY(-50%);line-height:0}
#stairs429 .stair-artwork>img{display:block;width:100%;height:auto}
#stairs429 .stair-artwork>.path-overlay{position:absolute;inset:0;width:100%;height:100%}
@media(max-width:540px){#stairs429 .stair-artwork{left:14%;width:72%}}