/* Scrubber Guide: mobile-first, no web fonts, no frameworks */
:root{
  --ink:#14211f;--ink2:#3c4d4a;--muted:#5d6f6b;--line:#dbe5e3;--bg:#fff;--tint:#f3f8f7;--tint2:#e6f1ef;
  --brand:#0b5d57;--brand2:#0e7a72;--brand-ink:#063c38;--accent:#ffd166;--warn:#b54708;--warn-bg:#fff6ea;--tip-bg:#edf8f1;
  --r:12px;--maxw:1180px;--prose:44rem;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:5rem}
body{margin:0;font-family:var(--font);font-size:1.0625rem;line-height:1.65;color:var(--ink);background:var(--bg);text-rendering:optimizeLegibility}
img,svg{max-width:100%}
a{color:var(--brand);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{color:var(--brand-ink);text-decoration-thickness:2px}
:focus-visible{outline:3px solid #1a73e8;outline-offset:2px;border-radius:4px}
h1,h2,h3{line-height:1.22;color:var(--ink);letter-spacing:-.01em}
h1{font-size:clamp(1.85rem,4.6vw,2.7rem);margin:.2em 0 .35em}
h2{font-size:clamp(1.35rem,3vw,1.7rem);margin:2em 0 .6em}
h3{font-size:1.18rem;margin:1.6em 0 .4em}
p{margin:0 0 1em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.1rem}
.wrap.narrow{max-width:52rem}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:.6rem 1rem;z-index:100}
.skip:focus{left:.5rem;top:.5rem}
main{display:block;min-height:60vh}
main:focus{outline:none}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:saturate(1.4) blur(6px)}
.header-row{display:flex;align-items:center;gap:.75rem;min-height:3.6rem}
.brand{display:flex;align-items:center;gap:.5rem;text-decoration:none;color:var(--ink);font-weight:700;font-size:1.15rem;letter-spacing:-.01em}
.brand b{color:var(--brand);font-weight:800}
.logo-mark{flex:none}
.main-nav{margin-left:auto;order:3}
.search-link{order:2;margin-left:auto;display:flex;align-items:center;gap:.3rem;text-decoration:none;color:var(--ink2);padding:.5rem;border-radius:8px}
.search-link span{display:none}
.search-link:hover{background:var(--tint)}
.nav-toggle{display:flex;align-items:center;gap:.45rem;padding:.55rem .6rem;border-radius:8px;font:inherit;font-weight:600;background:none;border:0;color:var(--ink);cursor:pointer;min-height:44px}
.nav-list{display:none}
.nav-list.open{display:block}
.nav-group>details>summary{list-style:none}
.nav-group>details>summary::-webkit-details-marker{display:none}
.burger,.burger::before,.burger::after{display:block;width:20px;height:2px;background:var(--ink);position:relative;border-radius:2px}
.burger::before,.burger::after{content:"";position:absolute;left:0}
.burger::before{top:-6px}.burger::after{top:6px}
.nav-mobile-label{font-size:.95rem}
.nav-list{list-style:none;margin:0;padding:.5rem 1rem 1rem;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 12px 30px rgba(0,0,0,.08);max-height:calc(100vh - 3.6rem);overflow:auto}
.nav-group>details>summary,.nav-solo>a{display:block;padding:.8rem .2rem;font-weight:700;border-bottom:1px solid var(--line);cursor:pointer;color:var(--ink);text-decoration:none}
.nav-panel{list-style:none;margin:0;padding:.3rem 0 .6rem}
.nav-panel a{display:block;padding:.5rem .4rem;text-decoration:none;color:var(--ink);border-radius:8px}
.nav-panel a strong{display:block;font-size:.98rem}
.nav-panel a span{display:block;font-size:.85rem;color:var(--muted);line-height:1.4}
.nav-panel a:hover,.nav-panel a[aria-current]{background:var(--tint)}
@media (min-width:980px){
  .main-nav{order:2;margin-left:1.5rem}
  .search-link{order:3}
  .search-link span{display:inline;font-size:.95rem}
  .nav-toggle{display:none}
  .nav-list,.nav-list.open{position:static;display:flex;gap:.2rem;padding:0;border:0;box-shadow:none;background:none;max-height:none;overflow:visible}
  .nav-group{position:relative}
  .nav-group>details>summary,.nav-solo>a{border:0;padding:.5rem .8rem;border-radius:8px;font-weight:600;font-size:.98rem}
  .nav-group>details>summary:hover,.nav-solo>a:hover{background:var(--tint)}
  .nav-group>details>summary::after{content:"";display:inline-block;margin-left:.4rem;border:4px solid transparent;border-top-color:currentColor;transform:translateY(2px)}
  .nav-panel{position:absolute;top:calc(100% + .4rem);left:0;width:22rem;background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:0 18px 40px rgba(0,0,0,.12);padding:.5rem}
}

/* breadcrumbs */
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.2rem;margin:1rem 0 .4rem;padding:0;font-size:.88rem;color:var(--muted)}
.crumbs li+li::before{content:"/";margin:0 .35rem;color:#a9b8b5}
.crumbs a{color:var(--muted)}

/* buttons, forms */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;background:var(--brand);color:#fff;border:0;border-radius:10px;padding:.75rem 1.15rem;font:inherit;font-weight:700;text-decoration:none;cursor:pointer;min-height:44px}
.btn:hover{background:var(--brand-ink);color:#fff}
.btn-accent{background:var(--accent);color:var(--ink)}
.btn-accent:hover{background:#ffc23d;color:var(--ink)}
.search-form{display:flex;gap:.5rem;margin:1rem 0}
.search-form input{flex:1;min-width:0;font:inherit;padding:.7rem .9rem;border:2px solid var(--line);border-radius:10px;background:#fff;min-height:44px}
.search-form input:focus{border-color:var(--brand2);outline:none}

/* hero */
.hero{background:radial-gradient(1200px 400px at 85% -10%,#1a8a80 0,transparent 60%),linear-gradient(160deg,#0b5d57,#073f3b);color:#fff;padding:2.2rem 0 2.6rem}
.hero h1{color:#fff;max-width:18ch}
.hero-sub{font-size:1.1rem;color:#d7efeb;max-width:38rem}
.eyebrow{font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand2);margin:0}
.eyebrow a{text-decoration:none;color:inherit}
.eyebrow.light{color:var(--accent)}
.hero-search input{border-color:transparent}
.hero-grid{display:grid;gap:1.6rem}
.paths{display:grid;gap:.7rem}
.path{display:block;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:var(--r);padding:.95rem 1.1rem;color:#fff;text-decoration:none}
.path:hover{background:rgba(255,255,255,.15);color:#fff}
.path strong{display:block;font-size:1.1rem}
.path span{display:block;color:#cfe8e4;font-size:.93rem}
.path .path-k{color:var(--accent);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em}
@media (min-width:900px){.hero{padding:3.5rem 0 3.8rem}.hero-grid{grid-template-columns:1.25fr 1fr;align-items:center;gap:3rem}}

/* home */
.home section{margin:2.6rem 0}
.symptoms h2,.explore h2{margin-top:0}
.chips{list-style:none;display:flex;flex-wrap:wrap;gap:.5rem;margin:0;padding:0}
.chips a{display:inline-block;padding:.55rem .9rem;border:1px solid var(--line);border-radius:999px;text-decoration:none;color:var(--ink);background:var(--tint);font-weight:600;font-size:.95rem}
.chips a:hover{border-color:var(--brand2);background:var(--tint2)}
.more{margin-top:1rem}
.sec-grid{list-style:none;padding:0;margin:0;display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(16rem,1fr))}
.sec-card{border:1px solid var(--line);border-radius:var(--r);padding:1.1rem 1.2rem;background:#fff}
.sec-card h3{margin:0 0 .3rem;font-size:1.1rem}
.sec-card h3 a{text-decoration:none;color:var(--ink)}
.sec-card h3 a:hover{color:var(--brand)}
.sec-card p{color:var(--muted);font-size:.93rem;margin-bottom:.6rem}
.sec-card ul{margin:0;padding-left:1.1rem;font-size:.93rem}
.sec-card li{margin:.2rem 0}
.two-col{display:grid;gap:1.5rem}
@media (min-width:800px){.two-col{grid-template-columns:1fr 1fr}}
.two-col h2{margin-top:0}
.link-list{padding-left:1.1rem;margin:0}
.link-list li{margin:.35rem 0}
.calc-teaser{display:grid;gap:1.5rem;background:var(--tint);border-radius:18px;padding:1.4rem}
.calc-teaser h2{margin-top:0}
.bench h3{margin-top:0}
@media (min-width:900px){.calc-teaser{grid-template-columns:1.2fr 1fr;padding:2rem}}
.small{font-size:.88rem;color:var(--muted)}
.trust-grid{list-style:none;padding:0;margin:0;display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(14rem,1fr))}
.trust-grid li{border-left:3px solid var(--brand2);padding:.2rem 0 .2rem 1rem}
.trust-grid strong{display:block}
.trust-grid span{color:var(--muted);font-size:.95rem}

/* anatomy */
.anatomy{border:1px solid var(--line);border-radius:18px;padding:1.3rem;margin:2rem 0}
.anatomy h2{margin:0 0 .2rem}
.anat-sub{color:var(--muted)}
.anat-grid{display:grid;gap:1.2rem}
@media (min-width:900px){.anat-grid{grid-template-columns:1.4fr 1fr;align-items:center}}
.anat-svg{width:100%;height:auto;display:block}
.hot rect,.hot circle{fill:#fff;stroke:var(--brand2);stroke-width:2.5;transition:fill .15s}
.hot text{font:600 15px var(--font);fill:var(--brand-ink);text-anchor:middle;pointer-events:none}
.hot:hover rect,.hot:hover circle,.hot:focus rect,.hot:focus circle{fill:var(--accent)}
.anat-list{list-style:none;margin:0;padding:0;display:grid;gap:.4rem}
.anat-list a{display:block;padding:.55rem .8rem;border-radius:10px;text-decoration:none;color:var(--muted);font-size:.9rem;background:var(--tint)}
.anat-list a strong{display:block;color:var(--ink);font-size:1rem}
.anat-list a:hover{background:var(--tint2)}

/* hubs */
.hub-head{padding:.5rem 0 1rem;max-width:var(--prose)}
.hub-intro{color:var(--ink2)}
.card-grid{list-style:none;padding:0;margin:1rem 0 2.5rem;display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(17rem,1fr))}
.card a{display:block;height:100%;border:1px solid var(--line);border-radius:var(--r);padding:1.1rem 1.2rem;text-decoration:none;color:var(--ink);background:#fff;transition:border-color .15s,box-shadow .15s}
.card a:hover{border-color:var(--brand2);box-shadow:0 6px 20px rgba(11,93,87,.09)}
.card h2{font-size:1.1rem;margin:0 0 .4rem;color:var(--brand-ink)}
.card p{margin:0;color:var(--muted);font-size:.93rem}
.cta-band{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between;background:var(--tint);border-radius:var(--r);padding:1.1rem 1.3rem;margin:.5rem 0 1rem}
.cta-band h2{margin:0;font-size:1.2rem}
.cta-band p{margin:.2rem 0 0;color:var(--muted)}
.also{margin:2rem 0 3rem}
.pill-grid{list-style:none;padding:0;margin:0;display:grid;gap:.6rem;grid-template-columns:repeat(auto-fill,minmax(15rem,1fr))}
.pill-grid a{display:block;padding:.75rem 1rem;border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--ink)}
.pill-grid a span{display:block;color:var(--muted);font-size:.88rem}
.pill-grid a:hover{border-color:var(--brand2)}
.pill-grid.small a{padding:.55rem .8rem}

/* article */
.article-head{max-width:var(--prose);margin-bottom:1.2rem}
.dek{font-size:1.15rem;color:var(--ink2)}
.byline{display:flex;flex-wrap:wrap;gap:.3rem 1rem;font-size:.88rem;color:var(--muted);border-top:1px solid var(--line);padding-top:.7rem;margin-top:1rem}
.byline a{color:var(--muted)}
.article-grid{display:grid;gap:1rem}
@media (min-width:1080px){
  .article-grid{grid-template-columns:15rem minmax(0,var(--prose));gap:3rem}
  .article-side .toc{position:sticky;top:5rem;max-height:calc(100vh - 6rem);overflow:auto}
  .article-head{margin-left:18rem}
  .prevnext,.related{margin-left:18rem;max-width:var(--prose)}
}
.toc{font-size:.92rem}
.toc details{border:1px solid var(--line);border-radius:var(--r);padding:.6rem .9rem;background:var(--tint)}
.toc summary{font-weight:700;cursor:pointer}
.toc ol{margin:.5rem 0 0;padding-left:1.1rem}
.toc li{margin:.3rem 0}
.toc a{color:var(--ink2);text-decoration:none}
.toc a:hover,.toc a.on{color:var(--brand);text-decoration:underline}
@media (min-width:1080px){.toc details{background:none;border:0;padding:0}.toc summary{pointer-events:none;list-style:none;text-transform:uppercase;font-size:.78rem;letter-spacing:.08em;color:var(--muted)}.toc summary::-webkit-details-marker{display:none}}
.prose{max-width:var(--prose);min-width:0}
.prose>h2:first-child{margin-top:0}
.prose ul,.prose ol{padding-left:1.3rem;margin:0 0 1.1em}
.prose li{margin:.35em 0}
.prose li::marker{color:var(--brand2)}
.lead{font-size:1.15rem;color:var(--ink2)}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em;background:var(--tint);padding:.1em .35em;border-radius:5px}
.takeaways{background:var(--tint);border:1px solid var(--tint2);border-left:4px solid var(--brand);border-radius:var(--r);padding:1rem 1.2rem;margin:0 0 1.6rem}
.takeaways h2{font-size:1rem;margin:0 0 .4rem;text-transform:uppercase;letter-spacing:.06em;color:var(--brand)}
.takeaways ul{margin:0}
.callout{border-radius:var(--r);padding:.9rem 1.1rem;margin:1.3rem 0;background:#eef5ff;border-left:4px solid #3d6fd6}
.callout p{margin:0}
.callout-tip{background:var(--tip-bg);border-left-color:#2f8f5b}
.callout-warn{background:var(--warn-bg);border-left-color:var(--warn)}
.formula{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.95rem;background:var(--tint);border:1px dashed #b9cfcb;border-radius:10px;padding:.8rem 1rem;overflow-x:auto}
.table-wrap{overflow-x:auto;margin:1.2rem 0 1.6rem;border:1px solid var(--line);border-radius:var(--r);-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:.93rem;line-height:1.45}
th,td{padding:.6rem .75rem;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
thead th{background:var(--tint);font-weight:700;white-space:nowrap;color:var(--brand-ink)}
tbody th{font-weight:600}
tbody tr:last-child>*{border-bottom:0}
tbody tr:nth-child(even){background:#fafcfc}
.faq h3.faq-q{font-size:1.06rem;margin:1.3em 0 .3em;padding-left:1.6rem;position:relative}
.faq h3.faq-q::before{content:"Q";position:absolute;left:0;top:.05em;font-size:.8rem;background:var(--brand);color:#fff;border-radius:5px;width:1.2rem;height:1.25rem;display:grid;place-items:center}
.trust-box{margin:2.5rem 0 1rem;border-top:1px solid var(--line);padding-top:1rem;font-size:.93rem;color:var(--muted)}
.trust-box h2{font-size:1rem;margin:0 0 .3rem;color:var(--ink2)}
.prevnext{display:grid;gap:.8rem;margin:2rem 0}
@media (min-width:700px){.prevnext{grid-template-columns:1fr 1fr}}
.pn{display:block;border:1px solid var(--line);border-radius:var(--r);padding:.8rem 1rem;text-decoration:none;color:var(--ink);font-weight:600}
.pn span{display:block;font-size:.8rem;color:var(--muted);font-weight:500}
.pn.next{text-align:right}
.pn:hover{border-color:var(--brand2)}
.related{margin:2rem 0 3rem}
.rel-grid{list-style:none;padding:0;margin:0;display:grid;gap:.7rem;grid-template-columns:repeat(auto-fill,minmax(15rem,1fr))}
.rel-grid a{display:block;height:100%;padding:.8rem 1rem;border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--ink);font-weight:600;line-height:1.35}
.rel-grid a:hover{border-color:var(--brand2)}
.kicker{display:block;font-size:.72rem;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--brand2);margin-bottom:.2rem}
.page{margin-bottom:3rem}
.page .article-head{margin-left:0}

/* tools */
.tool{border:2px solid var(--tint2);background:var(--tint);border-radius:16px;padding:1.1rem;margin:0 0 2rem}
.tool.mini{background:#fff;margin:0}
.fields{display:grid;gap:.9rem;grid-template-columns:repeat(auto-fill,minmax(13rem,1fr))}
.fields.one{grid-template-columns:1fr}
.field label{display:block;font-weight:700;font-size:.92rem;margin-bottom:.25rem}
.field small{display:block;color:var(--muted);font-size:.8rem;line-height:1.35;margin-top:.25rem}
.inp{display:flex;align-items:stretch;border:2px solid var(--line);border-radius:10px;background:#fff;overflow:hidden}
.inp:focus-within{border-color:var(--brand2)}
.inp input{flex:1;min-width:0;border:0;font:inherit;padding:.6rem .7rem;background:none;min-height:44px}
.inp input:focus{outline:none}
.unit{display:flex;align-items:center;padding:0 .7rem;background:var(--tint);color:var(--muted);font-size:.85rem;white-space:nowrap}
select{width:100%;font:inherit;padding:.6rem .7rem;border:2px solid var(--line);border-radius:10px;background:#fff;min-height:44px}
.results{display:block;margin-top:1.1rem}
.res-grid{display:grid;gap:.6rem;grid-template-columns:repeat(auto-fill,minmax(10.5rem,1fr))}
.res{background:#fff;border:1px solid var(--line);border-radius:10px;padding:.7rem .85rem}
.res b{display:block;font-size:1.35rem;color:var(--brand-ink);line-height:1.2}
.res span{font-size:.82rem;color:var(--muted)}
.res.hl{background:var(--brand);border-color:var(--brand)}
.res.hl b,.res.hl span{color:#fff}
.res-note{font-size:.9rem;color:var(--ink2);margin:.8rem 0 0}
.rec-list{list-style:none;padding:0;margin:.6rem 0 0;display:grid;gap:.4rem}
.rec-list li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:.55rem .8rem;font-size:.93rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.rec-list li.ok{border-color:#2f8f5b}
.rec-list li.best{border:2px solid var(--brand);background:#f2fbf9}
.rec-list li.no{opacity:.6}
.ff-steps{margin-top:1rem}
.ff-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:1rem 1.1rem}
.ff-card h3{margin:.1rem 0 .4rem}
.ff-prog{font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.ff-actions{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.8rem}
.btn-ghost{background:#fff;color:var(--brand);border:2px solid var(--brand)}
.btn-ghost:hover{background:var(--tint);color:var(--brand-ink)}

/* glossary, faq, search */
.az{display:flex;flex-wrap:wrap;gap:.35rem;margin:1rem 0 1.5rem}
.az a{display:inline-block;padding:.35rem .65rem;border:1px solid var(--line);border-radius:8px;text-decoration:none;font-weight:600;font-size:.9rem}
.gloss dt{font-weight:700;margin-top:1rem;color:var(--brand-ink)}
.gloss dd{margin:.2rem 0 0;color:var(--ink2)}
.faq-item{border:1px solid var(--line);border-radius:10px;margin:.5rem 0;padding:.1rem .9rem}
.faq-item summary{cursor:pointer;font-weight:600;padding:.6rem 0}
.search-results{padding-left:1.2rem}
.search-results li{margin:1rem 0}
.search-results a{font-weight:700;font-size:1.05rem}
.search-results p{margin:.2rem 0 0;color:var(--muted);font-size:.93rem}
.contact-card{border:1px solid var(--line);border-radius:var(--r);padding:1rem 1.2rem;background:var(--tint)}
.notfound{padding:3rem 1.1rem}

/* footer */
.site-footer{background:#0a2523;color:#c9dbd8;margin-top:3rem;padding:2.5rem 0 1.5rem;font-size:.93rem}
.site-footer a{color:#e6f2f0;text-decoration:none}
.site-footer a:hover{text-decoration:underline;color:#fff}
.brand-footer{color:#fff}
.brand-footer b{color:var(--accent)}
.footer-top p{max-width:34rem;margin-top:.6rem}
.footer-cols{display:grid;gap:1.4rem;grid-template-columns:repeat(auto-fill,minmax(10.5rem,1fr));margin:1.8rem 0}
.footer-cols h2{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin:0 0 .5rem}
.footer-cols ul{list-style:none;padding:0;margin:0}
.footer-cols li{margin:.35rem 0}
.fine{font-size:.82rem;color:#9fb6b2;border-top:1px solid #1f3d3a;padding-top:1rem;margin:0}

@media print{.site-header,.site-footer,.toc,.related,.prevnext{display:none}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}