@charset "UTF-8";
:root{--ink:#172a62;--muted:#667595;--line:#dfe5f1;--paper:#fff;--accent:#536bbb;--surface:#f7f8fc;--error:#a52d43;--under:#a7b8e1;--normal:#536bbb;--over:#8e9cc2;--obesity:#bdc6dd;font-family:"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--surface);font-synthesis:none;font-weight:400}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button,a,select,summary{touch-action:manipulation}button{cursor:pointer}a{color:inherit}button:disabled{cursor:default}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #8fa5ec;outline-offset:5px}button{color:var(--ink)}[hidden]{display:none!important}::selection{background:#dce4ff}
.header,main,footer{width:min(1120px,calc(100% - 80px));margin-inline:auto}.header{height:98px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:24px}.brand{text-decoration:none;display:flex;align-items:center;font-size:32px;font-weight:750;letter-spacing:-1.8px}.brand-dot{color:var(--accent)}.brand-label{font-size:9px;font-weight:650;letter-spacing:2.2px;margin-left:20px}.brand-icon{width:27px;height:26px;display:flex;align-items:flex-end;gap:4px;margin-right:12px}.brand-icon i{display:block;width:5px;background:var(--ink);border-radius:2px}.brand-icon i:nth-child(1){height:12px}.brand-icon i:nth-child(2){height:24px;background:var(--accent)}.brand-icon i:nth-child(3){height:18px}.header-tools{display:flex;align-items:center;gap:32px}.project-label,.eyebrow,.example-label{font-size:10px;letter-spacing:2px;font-weight:650;line-height:1.6}.project-label{color:var(--muted);font-family:Consolas,monospace;font-size:9px;font-weight:400}#language{padding:10px 29px 10px 13px;background:var(--paper);border:1px solid var(--line);border-radius:9px;color:var(--ink);font-size:12px;cursor:pointer;max-width:150px}
.intro{padding:59px 0 36px;position:relative}.eyebrow{margin:0 0 18px;color:var(--accent)}h1{font-size:clamp(38px,4.5vw,57px);line-height:1.12;letter-spacing:-2.5px;font-weight:650;margin:0 0 22px}.muted-heading{color:#7f8cab}.intro>p:not(.eyebrow){font-size:15px;line-height:1.8;max-width:490px;margin:0;color:var(--muted)}.adult-label{display:inline-flex;gap:8px;align-items:center;position:absolute;right:0;bottom:41px;border:1px solid var(--line);border-radius:30px;padding:9px 14px;background:var(--paper);font-size:11px;color:var(--muted)}.adult-label>span:first-child{font-size:16px;color:var(--accent)}
.calculator-grid{display:grid;grid-template-columns:0.86fr 1.14fr;gap:24px;align-items:stretch}.input-card{padding:32px;border:1px solid var(--line);background:var(--paper);border-radius:20px}.card-heading{display:flex;align-items:flex-start;gap:15px;margin-bottom:27px}.step{display:grid;place-items:center;flex-shrink:0;width:34px;height:34px;border:1px solid var(--line);border-radius:50%;font:10px Consolas,monospace;color:var(--muted);margin-top:2px}h2{font-size:21px;font-weight:650;letter-spacing:-.55px;margin:0}.card-heading p{font-size:12px;color:var(--muted);margin:6px 0 0;line-height:1.5}.units{display:flex;background:var(--surface);padding:4px;border-radius:10px;margin-bottom:27px;border:1px solid var(--line);gap:4px}.units button{flex:1;background:transparent;border:1px solid transparent;border-radius:7px;padding:10px 6px;display:flex;justify-content:center;align-items:center;gap:8px;font-size:12px;color:var(--muted)}.units small{font-size:10px;white-space:nowrap;font-weight:400}.units button[aria-pressed=true]{background:var(--paper);box-shadow:0 2px 5px #172a6209;border-color:var(--line);color:var(--ink);font-weight:600}.field{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:600;margin-bottom:10px}.field-icon{color:var(--muted);font-size:17px;font-weight:400}.input-shell{display:flex;align-items:center;border:1px solid #d5ddec;border-radius:9px;transition:border-color .15s,box-shadow .15s;background:#fff}.input-shell:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px #536bbb14}.input-shell:has([aria-invalid=true]){border-color:var(--error);box-shadow:0 0 0 2px #a52d430a}.input-shell input{width:100%;min-width:0;border:0;outline:none;padding:15px 17px;font-size:25px;line-height:1.2;background:transparent;color:var(--ink);font-weight:500;letter-spacing:-.5px;font-variant-numeric:tabular-nums}.input-shell>span{font-size:13px;color:var(--muted);padding-right:18px}.field-support{min-height:31px;font-size:10px;line-height:1.5;color:var(--muted);padding:6px 1px 9px}.error{color:var(--error);display:block;font-size:11px}.primary{width:100%;display:flex;justify-content:space-between;align-items:center;border:0;border-radius:9px;background:var(--ink);color:white;padding:16px 20px;margin-top:2px;font-size:13px;font-weight:600;box-shadow:0 6px 14px #172a6210;transition:background .2s,transform .2s}.primary>span:last-child{font-size:20px;line-height:1}.primary:hover{background:#29417c;transform:translateY(-1px)}.primary:active{transform:translateY(0)}.form-actions{display:flex;justify-content:space-between;margin-top:10px;gap:8px}.form-actions button{border:0;background:transparent;padding:9px 1px;font-size:11px;color:var(--muted)}.form-actions button:hover{color:var(--ink);text-decoration:underline;text-underline-offset:4px}.privacy{display:flex;gap:11px;align-items:flex-start;padding-top:20px;margin-top:17px;border-top:1px solid var(--line)}.privacy svg{width:17px;height:20px;flex-shrink:0;stroke:var(--accent);stroke-width:1.5;fill:none;margin-top:1px;stroke-linecap:round;stroke-linejoin:round}.privacy p{margin:0;color:var(--muted);font-size:10px;line-height:1.7;max-width:325px}
.result-card{position:relative;background:#e9edf8;border:1px solid #dce3f2;border-radius:20px;padding:28px;display:flex;flex-direction:column;min-width:0;overflow:hidden}.result-top{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:30px;margin-bottom:22px}.result-top .eyebrow{margin:0;font-size:9px;letter-spacing:1.8px}.example-label{font-size:8px;letter-spacing:1px;color:var(--muted);text-align:right}#result,.empty-result{background:white;border:1px solid #dfe5f3;border-radius:15px;box-shadow:0 20px 40px -24px #253b7d50;padding:30px 29px 22px;text-align:center;flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:396px}.result-number{display:flex;align-items:baseline;justify-content:center;gap:9px;white-space:nowrap;margin:1px 0 10px}.result-number>span:first-child{font-size:clamp(74px,8vw,112px);letter-spacing:-7px;font-weight:600;line-height:1.1;font-variant-numeric:tabular-nums}.result-number[data-long=true]>span:first-child{font-size:76px;letter-spacing:-4px}.result-number>span:last-child{font-size:13px;color:var(--muted);font-weight:500}.category{display:inline-flex;gap:7px;align-items:center;padding:7px 12px;background:#f0f3fb;border:1px solid #e7ebf6;border-radius:24px;font-size:11px;font-weight:600;text-align:center;line-height:1.4}.category:before{content:"";width:5px;height:5px;border-radius:50%;background:var(--category-color,var(--accent));flex-shrink:0}.result-caption{font-size:11px;line-height:1.6;color:var(--muted);margin:12px 0 0}.scale-wrap{width:100%;margin:35px 0 32px}.scale{position:relative;display:flex;width:100%;height:7px;border-radius:4px}.scale>div:nth-child(1){width:23.214286%;background:var(--under);border-radius:4px 0 0 4px}.scale>div:nth-child(2){width:23.214286%;background:var(--normal)}.scale>div:nth-child(3){width:17.857142%;background:var(--over)}.scale>div:nth-child(4){width:35.714286%;background:var(--obesity);border-radius:0 4px 4px 0}.marker{position:absolute;left:37%;top:50%;transform:translate(-50%,-50%);width:15px;height:15px;border:2px solid white;border-radius:50%;background:var(--ink);box-shadow:0 0 0 1px var(--ink);transition:left .35s cubic-bezier(.2,.8,.2,1)}.scale-values{position:relative;height:13px;margin-top:12px;font-size:9px;color:var(--muted);font-variant-numeric:tabular-nums}.scale-values>span{position:absolute;transform:translateX(-50%)}.scale-values>span:nth-child(1){left:0;transform:none}.scale-values>span:nth-child(2){left:23.214286%}.scale-values>span:nth-child(3){left:46.428572%}.scale-values>span:nth-child(4){left:64.285714%}.scale-values>span:nth-child(5){right:0;transform:none}.result-details{width:100%;display:grid;grid-template-columns:repeat(3,1fr);padding-top:22px;border-top:1px solid var(--line);gap:12px;text-align:left}.result-details>div:last-child{text-align:right}.result-details>div:nth-child(2){text-align:center}.result-details span{display:block;color:var(--muted);font-size:9px;line-height:1.5;margin-bottom:8px}.result-details strong{font-size:17px;font-weight:500;letter-spacing:-.3px;white-space:nowrap}.result-details small{font-size:10px;font-weight:400;color:var(--muted)}.rounding-note{font-size:9px;color:var(--muted);line-height:1.5;margin:20px 0 0}.result-bottom{display:flex;align-items:center;gap:7px;padding:23px 0 0;font-size:10px;color:var(--muted);min-height:46px}.status-dot{width:5px;height:5px;background:var(--accent);border-radius:50%;flex-shrink:0}.result-bottom button{margin-left:auto;border:0;background:transparent;color:var(--ink);padding:5px 0 5px 12px;font-size:10px;white-space:nowrap}.result-bottom button:disabled{opacity:.4}.result-bottom button:not(:disabled):hover{text-decoration:underline;text-underline-offset:4px}.empty-result>span{font-size:90px;color:#cdd6ec;font-weight:300;line-height:1.2;margin-bottom:20px}.empty-result h3{font-size:21px;font-weight:500;margin:0 0 10px}.empty-result p{max-width:260px;font-size:13px;color:var(--muted);line-height:1.7;margin:0}
.context{margin-top:58px}.context-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:25px;margin-bottom:25px}.context-heading .eyebrow{font-size:9px;margin-bottom:11px}.context-heading h2{font-size:26px;letter-spacing:-.8px}.context-heading a{font-size:11px;color:var(--muted);text-decoration:none;padding-bottom:3px;white-space:nowrap}.context-heading a:hover{text-decoration:underline;text-underline-offset:4px}.categories{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}.categories article{padding:22px;background:white;border:1px solid var(--line);border-radius:10px;transition:border-color .2s,box-shadow .2s}.categories article[data-active=true]{border-color:#8ea0d4;box-shadow:0 0 0 1px #8ea0d42b}.category-line{display:block;width:24px;height:4px;border-radius:4px;background:var(--under);margin-bottom:18px}.categories article:nth-child(2) .category-line{background:var(--normal)}.categories article:nth-child(3) .category-line{background:var(--over)}.categories article:nth-child(4) .category-line{background:var(--obesity)}.categories h3{font-size:12px;font-weight:550;margin:0 0 9px;line-height:1.4}.categories p{font-size:11px;color:var(--muted);margin:0}.context-note{display:flex;align-items:flex-start;gap:13px;margin:21px 0 0;color:var(--muted)}.context-note>span{border:1px solid #a6b1ca;border-radius:50%;width:16px;height:16px;display:grid;place-items:center;font:11px Georgia,serif;flex-shrink:0;margin-top:2px}.context-note p{font-size:11px;line-height:1.8;margin:0;max-width:980px}.method{margin-top:28px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:0 2px}.method summary{padding:22px 0;cursor:pointer;font-size:12px;font-weight:500;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:20px}.method summary::-webkit-details-marker{display:none}.method summary:after{content:"+";font-size:19px;font-weight:300;color:var(--accent)}.method[open] summary:after{content:"−"}.method>div{max-width:770px;padding-bottom:18px;font-size:12px;color:var(--muted);line-height:1.8}.method>div p:first-child{margin-top:0;color:var(--ink)}footer{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-block:30px 35px;font-size:10px;color:var(--muted);line-height:1.8}.footer-rule{padding:0 8px;color:#b6c0d8}footer>span:first-child{color:var(--ink)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:14px 22px;border-radius:10px;background:var(--ink);color:#fff;font-size:12px;line-height:1.5;box-shadow:0 8px 30px #172a6230;max-width:calc(100% - 32px);width:max-content;z-index:10}noscript p{padding:20px;text-align:center;background:#fff1f3;color:var(--error)}
@media(min-width:1500px){.intro{padding-top:70px}}
@media(max-width:960px){.header,main,footer{width:calc(100% - 48px)}.calculator-grid{gap:16px;grid-template-columns:.95fr 1.05fr}.input-card{padding:24px}.result-card{padding:22px}#result,.empty-result{padding:24px 20px 20px}.result-number>span:first-child{font-size:88px;letter-spacing:-5px}.result-number[data-long=true]>span:first-child{font-size:62px}.result-details strong{font-size:15px}.units button{flex-direction:column;gap:3px;padding-block:8px}.result-top{flex-wrap:wrap;gap:5px}.example-label{text-align:left}.categories article{padding:19px 16px}.intro>p:not(.eyebrow){max-width:440px}.adult-label{position:static;margin-top:18px}.intro{padding-bottom:29px}.header-tools{gap:20px}}
@media(max-width:700px){.header,main,footer{width:calc(100% - 36px)}.header{height:79px;gap:15px}.brand{font-size:29px}.brand-label{font-size:8px;letter-spacing:1.5px;margin-left:13px}.brand-icon{display:none}.project-label{display:none}#language{font-size:11px;max-width:130px;padding:9px 22px 9px 11px}.intro{padding-top:39px}.intro .eyebrow{font-size:8px;letter-spacing:1.6px;margin-bottom:17px}h1{font-size:clamp(35px,7.5vw,48px);letter-spacing:-1.6px;margin-bottom:18px}.intro>p:not(.eyebrow){font-size:13px;max-width:400px}.adult-label{font-size:10px;padding:6px 11px}.calculator-grid{grid-template-columns:1fr;gap:18px}.input-card{padding:25px}.units button{flex-direction:row;padding:10px 5px;gap:8px}.card-heading{margin-bottom:22px}.units{margin-bottom:24px}.privacy{margin-top:11px;padding-top:16px}.result-card{padding:23px;min-height:485px}.result-top{flex-wrap:nowrap;gap:12px}.result-top .eyebrow{font-size:8px}.example-label{font-size:7px;text-align:right}#result,.empty-result{padding:26px 22px 22px;min-height:368px}.result-number>span:first-child{font-size:95px}.result-number[data-long=true]>span:first-child{font-size:64px;letter-spacing:-3px}.result-number>span:last-child{font-size:12px}.scale-wrap{margin:30px 0}.result-details strong{font-size:17px}.context{margin-top:41px}.context-heading{align-items:flex-start;flex-direction:column;gap:16px;margin-bottom:20px}.context-heading h2{font-size:24px}.context-heading .eyebrow{font-size:8px}.categories{grid-template-columns:repeat(2,1fr);gap:11px}.categories article{padding:19px}.categories h3{font-size:11px}.context-note p{font-size:10px}.method summary{font-size:11px}.method>div{font-size:11px}footer{padding-block:25px;align-items:flex-start;flex-direction:column;gap:7px}.toast{bottom:14px}}
@media(max-width:370px){.header,main,footer{width:calc(100% - 28px)}.brand-label{display:none}.input-card{padding:20px}.result-card{padding:18px}#result,.empty-result{padding-inline:16px}.result-number>span:first-child{font-size:80px}.result-number[data-long=true]>span:first-child{font-size:53px}.result-details strong{font-size:15px}.result-details{gap:6px}.result-details span{font-size:8px}.units button{gap:5px;font-size:11px}.categories article{padding:16px}.result-bottom{font-size:9px}.result-bottom button{font-size:9px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media print{body{background:white}.header,main,footer{width:100%}.header-tools,.input-card,.intro,.method,.result-bottom,footer{display:none}.calculator-grid{display:block}.result-card{break-inside:avoid;max-width:600px;margin:25px auto}.context{margin-top:25px}.toast{display:none}}