/* Vital Bench — ECG chart paper: pink calibration grid, deep rose trace, tight Archivo headings. */
:root,[data-theme="health-tools"]{
--color-primary:#9d174d;--color-bg:#fffdfd;--color-bg-alt:#fdf2f6;--color-text:#1f2933;
--color-text-muted:#6b6a6e;--color-border:#eecfd9;--paper:#fff;
--grid-fine:#fbe4ea;--grid-bold:#f3c9d6;
--radius-sm:3px;--radius-md:4px;
--font-display:"Archivo",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
--font-base:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
--font-mono:ui-monospace,SFMono-Regular,Menlo,monospace}
*{box-sizing:border-box}
body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-base);-webkit-font-smoothing:antialiased}
a{color:var(--color-primary)}
:focus-visible{outline:2px solid var(--color-primary);outline-offset:3px}
/* nav */
.site-nav{background:var(--paper);border-bottom:1px solid var(--color-border)}
.nav-container{position:relative;height:70px;max-width:1160px;margin:auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center}
.nav-logo{height:32px}
.nav-site-name{font:800 20px/1 var(--font-display);letter-spacing:-.025em}
.nav-links,.footer-links{display:flex;gap:22px;flex-wrap:wrap}
.nav-links a,.footer-links a{text-decoration:none;color:var(--color-text-muted);font:600 12px/1 var(--font-display);letter-spacing:.06em}
.nav-links a:hover,.footer-links a:hover{color:var(--color-primary)}
/* home */
.vb-home{max-width:1160px;margin:auto;padding:0 20px 90px}
.vb-hero{position:relative;margin-top:26px;border:1px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden;background-color:var(--paper);background-image:
linear-gradient(var(--grid-fine) 1px,transparent 1px),linear-gradient(90deg,var(--grid-fine) 1px,transparent 1px),
linear-gradient(var(--grid-bold) 1px,transparent 1px),linear-gradient(90deg,var(--grid-bold) 1px,transparent 1px);
background-size:8px 8px,8px 8px,40px 40px,40px 40px}
.vb-hero-copy{padding:56px 44px 0;position:relative;z-index:1}
.vb-hero span{display:inline-block;font:700 11px/1 var(--font-display);letter-spacing:.2em;text-transform:uppercase;color:var(--color-primary);background:var(--paper);padding:5px 9px;border:1px solid var(--color-border);border-radius:2px}
.vb-hero h1{font:800 clamp(38px,5vw,62px)/1.02 var(--font-display);letter-spacing:-.04em;margin:20px 0 14px;max-width:17ch}
.vb-hero p{font-size:18px;line-height:1.65;color:var(--color-text-muted);max-width:52ch;margin:0}
.vb-trace{display:block;width:100%;height:130px;margin-top:22px}
.vb-trace path{fill:none;stroke:var(--color-primary);stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;
stroke-dasharray:1950;stroke-dashoffset:1950;animation:vb-draw 2.4s cubic-bezier(.4,0,.2,1) .25s forwards}
@keyframes vb-draw{to{stroke-dashoffset:0}}
.vb-scale{display:flex;align-items:center;gap:12px;margin:44px 0 16px;font:700 11px var(--font-display);letter-spacing:.2em;text-transform:uppercase;color:var(--color-text-muted)}
.vb-scale::after{content:"";flex:1;height:9px;background:repeating-linear-gradient(90deg,var(--color-border) 0 1px,transparent 1px 12px)}
.vb-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.vb-card{position:relative;display:block;background:var(--paper);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:26px 22px 22px;text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s}
.vb-card::before{content:"";position:absolute;left:0;right:0;top:0;height:6px;background:repeating-linear-gradient(90deg,var(--grid-bold) 0 1px,transparent 1px 8px)}
.vb-card:hover{border-color:var(--color-primary);box-shadow:0 10px 26px #9d174d14}
.vb-card img{width:34px;height:34px;margin-bottom:14px}
.vb-card h2{font:700 19px/1.25 var(--font-display);letter-spacing:-.02em;margin:0 0 8px}
.vb-card p{margin:0;font-size:14px;line-height:1.65;color:var(--color-text-muted)}
.vb-note{margin-top:34px;padding:16px 18px;border-left:3px solid var(--color-primary);background:var(--color-bg-alt);font-size:14px;line-height:1.7;color:var(--color-text-muted);border-radius:0 var(--radius-sm) var(--radius-sm) 0}
/* detail */
.vbd-page{max-width:1060px;margin:auto;padding:22px 20px 90px}
.vbd-crumb{font:600 12px var(--font-display);color:var(--color-text-muted)}
.vbd-crumb a{text-decoration:none}
.vbd-head{max-width:720px;padding:40px 0 26px;border-bottom:1px solid var(--color-border)}
.vbd-kicker{font:700 11px var(--font-display);letter-spacing:.2em;text-transform:uppercase;color:var(--color-primary)}
.vbd-head h1{font:800 clamp(33px,4.6vw,54px)/1.04 var(--font-display);letter-spacing:-.035em;margin:13px 0}
.vbd-head p{font-size:18px;line-height:1.7;color:var(--color-text-muted);margin:0}
.vbd-tool{border:1px solid var(--color-border);border-radius:var(--radius-md);padding:26px;margin:32px 0 50px;box-shadow:0 12px 30px #9d174d0f;
background-color:var(--paper);background-image:
linear-gradient(var(--grid-fine) 1px,transparent 1px),linear-gradient(90deg,var(--grid-fine) 1px,transparent 1px),
linear-gradient(var(--grid-bold) 1px,transparent 1px),linear-gradient(90deg,var(--grid-bold) 1px,transparent 1px);
background-size:8px 8px,8px 8px,40px 40px,40px 40px}
.vbd-tool-label{display:inline-block;font:700 11px var(--font-display);letter-spacing:.2em;text-transform:uppercase;color:var(--color-primary);background:var(--paper);padding:5px 9px;border:1px solid var(--color-border);border-radius:2px;margin-bottom:20px}
.vbd-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:56px}
.vbd-reading{font-size:17px;line-height:1.8}
.vbd-reading h2{font:800 26px/1.18 var(--font-display);letter-spacing:-.03em;margin:36px 0 12px}
.vbd-reading h3{font:700 19px var(--font-display);letter-spacing:-.02em;margin:26px 0 8px}
.vbd-reading p{margin:0 0 14px}
.vbd-reading ol,.vbd-reading ul{margin:0 0 16px;padding-left:22px}
.vbd-reading li{margin-bottom:7px}
.vbd-reading code{font:14px var(--font-mono);background:var(--color-bg-alt);padding:2px 6px;border-radius:3px}
.vbd-side{align-self:start;padding-top:14px;border-top:6px solid transparent;background:repeating-linear-gradient(90deg,var(--grid-bold) 0 1px,transparent 1px 8px) top/100% 6px no-repeat;color:var(--color-text-muted);font-size:14px;line-height:1.65}
.vbd-side strong{display:block;color:var(--color-text);font:700 11px var(--font-display);letter-spacing:.16em;text-transform:uppercase;margin-bottom:8px}
.vbd-side a{display:inline-block;margin-top:12px;color:var(--color-primary);font-weight:700;text-decoration:none}
.vbd-side a:hover{text-decoration:underline}
.vbd-index{margin-top:26px;border-top:1px solid var(--color-border);padding-top:14px}
.vbd-index ul{list-style:none;margin:10px 0 0;padding:0}
.vbd-index li{padding:6px 0;border-bottom:1px solid var(--color-bg-alt);font-size:13px}
.vbd-index a{display:block;color:var(--color-text);text-decoration:none}
.vbd-index a:hover{color:var(--color-primary)}
.vbd-index span[aria-current]{font-weight:700;color:var(--color-primary)}
.vbd-faq{margin-top:56px}
.vbd-faq h2{font:800 26px var(--font-display);letter-spacing:-.03em}
.vbd-faq details{border-bottom:1px solid var(--color-border);padding:15px 0}
.vbd-faq summary{cursor:pointer;font-weight:700}
.vbd-faq p{color:var(--color-text-muted);line-height:1.75}
.vbd-related{margin-top:56px}
.vbd-related h2{font:800 26px var(--font-display);letter-spacing:-.03em;margin-bottom:18px}
.vbd-related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.vbd-related-card{display:block;background:var(--paper);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;text-decoration:none;color:inherit;transition:transform .15s,border-color .15s}
.vbd-related-card:hover{transform:translateY(-3px);border-color:var(--color-primary)}
.vbd-related-card h3{font:700 17px var(--font-display);letter-spacing:-.02em;margin:0 0 8px}
.vbd-related-card p{font-size:14px;line-height:1.6;color:var(--color-text-muted);margin:0 0 12px}
.vbd-related-card span{font:700 11px var(--font-display);letter-spacing:.16em;text-transform:uppercase;color:var(--color-primary)}
.vbd-disclaimer{margin:44px 0 0;padding:16px 18px;border-left:3px solid var(--color-primary);background:var(--color-bg-alt);font-size:14px;line-height:1.7;color:var(--color-text-muted)}
.site-footer{border-top:1px solid var(--color-border);padding:32px 20px;text-align:center;background:var(--paper)}
.footer-copyright{margin-top:14px;font:12px var(--font-base);color:var(--color-text-muted)}
/* tool surface: a measurement bench */
[data-theme="health-tools"] .tool-row{gap:18px;margin-bottom:20px}
[data-theme="health-tools"] .tool-field{font:700 11px/1 var(--font-display);letter-spacing:.14em;text-transform:uppercase;color:var(--color-text-muted);gap:9px}
[data-theme="health-tools"] .tool-input,[data-theme="health-tools"] .tool-textarea{border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--paper);padding:11px 12px;font:17px/1.4 var(--font-display);font-variant-numeric:tabular-nums;color:var(--color-text)}
[data-theme="health-tools"] .tool-input:focus,[data-theme="health-tools"] .tool-textarea:focus{outline:0;border-color:var(--color-primary);box-shadow:0 0 0 3px #9d174d1f}
[data-theme="health-tools"] .tool-btn{border-radius:var(--radius-sm);padding:12px 22px;font:700 12px/1 var(--font-display);letter-spacing:.12em;text-transform:uppercase}
[data-theme="health-tools"] .tool-btn-primary{background:var(--color-primary);color:#fff;border:0}
[data-theme="health-tools"] .tool-btn-primary:hover{background:#7d1240}
[data-theme="health-tools"] .tool-result-box{margin-top:26px;padding:22px 24px;border:1px solid var(--color-primary);border-radius:var(--radius-md);background:var(--paper)}
[data-theme="health-tools"] .tool-stat-hero{margin:0 0 6px;font:800 clamp(34px,6vw,52px)/1 var(--font-display);letter-spacing:-.045em;font-variant-numeric:tabular-nums;color:var(--color-primary)}
[data-theme="health-tools"] .tool-unit{display:inline-block;margin-left:10px;font:700 12px var(--font-display);letter-spacing:.14em;text-transform:uppercase;color:var(--color-text-muted);vertical-align:middle}
[data-theme="health-tools"] .tool-hint{font-size:14px;line-height:1.7;color:var(--color-text-muted);margin-top:10px}
@media(max-width:960px){.vb-grid,.vbd-related-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){
.vb-hero{display:none}
.vb-home{padding:24px 16px 60px}
.vb-scale{margin-top:0}
.vb-grid,.vbd-related-grid{grid-template-columns:1fr}
.vbd-head{padding-top:26px}
.vbd-layout{grid-template-columns:1fr;gap:28px}
.vbd-side{margin-top:8px}
.vbd-tool{padding:20px 18px}
}
@media(prefers-reduced-motion:reduce){
.vb-trace path{animation:none;stroke-dashoffset:0}
.vbd-related-card:hover{transform:none}
}