/* HealthDiseases.org — style.css
   Palette: paper #FFFFFF · field #F2F5F7 · ink #1C2A35 · slate #4E5E6B · line #D9E1E7
            teal #0E5E6F (accent) · teal-tint #E4F0F2 · amber #8A5A0B (caution) · amber-tint #FBF3E2
   Type: Newsreader (headings, quick answers) · IBM Plex Sans (body, UI) */

:root{
  --paper:#fff; --field:#F2F5F7; --ink:#1C2A35; --slate:#4E5E6B; --line:#D9E1E7;
  --teal:#0E5E6F; --teal-dark:#0A4652; --teal-tint:#E4F0F2;
  --amber:#8A5A0B; --amber-tint:#FBF3E2; --red:#8C2F2F; --red-tint:#FBE9E9;
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --measure:70ch; --wide:1120px; --radius:6px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;overflow-x:hidden;max-width:100vw}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:1.0625rem;line-height:1.6;overflow-x:hidden;max-width:100vw}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:.15em}
a:hover{color:var(--teal-dark)}
:focus-visible{outline:3px solid var(--teal);outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--teal);color:#fff;padding:.6rem 1rem;z-index:100}
.skip:focus{left:1rem;top:1rem}

h1,h2,h3,h4{font-family:var(--serif);font-weight:500;line-height:1.2;margin:0 0 .5em;color:var(--ink);letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.5vw,2.9rem);line-height:1.12;margin-bottom:.4em}
h2{font-size:clamp(1.5rem,3vw,1.9rem);margin-top:2.2em}
h3{font-size:1.3rem;margin-top:1.6em}
h4{font-size:1.1rem;font-family:var(--sans);font-weight:600;margin-top:1.4em}
p,ul,ol{margin:0 0 1.1em}
li{margin-bottom:.35em}
small,.small{font-size:.9rem}
.muted{color:var(--slate)}
strong{font-weight:600}
hr{border:0;border-top:1px solid var(--line);margin:2.5rem 0}
blockquote{margin:1.5rem 0;padding:.2rem 0 .2rem 1.2rem;border-left:3px solid var(--line);color:var(--slate)}
code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92em;background:var(--field);padding:.1em .35em;border-radius:3px}

.wrap{max-width:var(--wide);margin:0 auto;padding:0 1.25rem}
.measure{max-width:var(--measure)}

/* Header */
.site-header{border-bottom:1px solid var(--line);background:var(--paper)}
.site-header .wrap{display:flex;align-items:center;gap:1.5rem;min-height:64px}
.brand{font-family:var(--serif);font-size:1.45rem;color:var(--ink);text-decoration:none;white-space:nowrap;letter-spacing:-.01em}
.brand span{color:var(--teal)}
.nav{display:flex;gap:1.1rem;margin-left:auto;list-style:none;padding:0;white-space:nowrap}
.nav-search-mobile{display:none}
.nav a{color:var(--ink);text-decoration:none;font-size:.97rem;padding:.4rem 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current=page]{border-bottom-color:var(--teal);color:var(--teal-dark)}
.hdr-search{display:flex;align-items:center;gap:.4rem}
.hdr-search input{width:170px;padding:.5rem .7rem;border:1px solid var(--line);border-radius:var(--radius);font:inherit;font-size:.95rem;background:var(--field)}
.hdr-search button,.btn{font:inherit;font-size:.95rem;padding:.5rem .9rem;border-radius:var(--radius);border:1px solid var(--teal);background:var(--teal);color:#fff;cursor:pointer;text-decoration:none;display:inline-block}
.btn:hover,.hdr-search button:hover{background:var(--teal-dark)}
.btn-quiet{background:transparent;color:var(--teal)}
.btn-quiet:hover{background:var(--teal-tint)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:var(--radius);padding:.45rem .7rem;font:inherit;cursor:pointer}
@media (max-width:1080px){.hdr-search{display:none}}
@media (max-width:880px){
  .nav-toggle{display:inline-block}
  .nav-search-mobile{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:64px;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:.5rem 1.25rem 1rem;z-index:50}
  .nav.open{display:flex}
  .nav a{display:block;padding:.7rem 0;border-bottom:1px solid var(--line)}
  .hdr-search{display:none}
  .site-header{position:relative}
}

/* Hero (home) */
.hero{padding:3.5rem 0 3rem;border-bottom:1px solid var(--line)}
.hero h1{max-width:18ch;font-size:clamp(2.3rem,6vw,3.6rem)}
.hero p.lead{font-size:1.2rem;color:var(--slate);max-width:52ch;margin-bottom:1.6rem}
.search-big{display:flex;max-width:640px;gap:.5rem}
.search-big input{flex:1;padding:.85rem 1rem;font:inherit;font-size:1.05rem;border:1px solid var(--line);border-radius:var(--radius);background:var(--field)}
.search-big button{padding:.85rem 1.2rem}
.hero .links{margin-top:1rem;font-size:.97rem}
.hero .links a{margin-right:1.4rem}

/* Sections */
.section{padding:3rem 0;border-bottom:1px solid var(--line)}
.section:last-of-type{border-bottom:0}
.section h2{margin-top:0}
.section .intro{color:var(--slate);max-width:60ch;margin-bottom:1.6rem}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:3rem}
.three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
@media (max-width:760px){.two-col,.three-col{grid-template-columns:1fr;gap:1.5rem}}

.topics{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.topics a{display:block;background:var(--paper);padding:1.25rem 1.25rem 1.35rem;text-decoration:none;color:var(--ink)}
.topics a:hover{background:var(--teal-tint)}
.topics strong{font-family:var(--serif);font-size:1.25rem;font-weight:500;display:block;margin-bottom:.25rem}
.topics span{color:var(--slate);font-size:.95rem}
@media (max-width:760px){.topics{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.topics{grid-template-columns:1fr}}

.list-plain{list-style:none;padding:0;margin:0}
.list-plain li{padding:.85rem 0;border-bottom:1px solid var(--line);margin:0}
.list-plain li:first-child{border-top:1px solid var(--line)}
.list-plain a{text-decoration:none;color:var(--ink);font-family:var(--serif);font-size:1.15rem}
.list-plain a:hover{color:var(--teal)}
.list-plain .meta{display:block;color:var(--slate);font-size:.9rem;margin-top:.15rem}

.chips{display:flex;flex-wrap:wrap;gap:.5rem;margin:1rem 0}
.chips a{border:1px solid var(--line);border-radius:999px;padding:.35rem .8rem;text-decoration:none;color:var(--ink);font-size:.95rem;background:var(--paper)}
.chips a:hover{border-color:var(--teal);color:var(--teal)}

.qa-list{list-style:none;padding:0;margin:0}
.qa-list li{padding:1rem 0;border-bottom:1px solid var(--line);margin:0}
.qa-list a{font-family:var(--serif);font-size:1.15rem;text-decoration:none;color:var(--ink)}
.qa-list a:hover{color:var(--teal)}
.qa-list p{margin:.3rem 0 0;color:var(--slate);font-size:.97rem}

.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;counter-reset:step}
.steps div{border-top:2px solid var(--teal);padding-top:.9rem}
.steps div::before{counter-increment:step;content:counter(step);font-family:var(--serif);font-size:1.6rem;color:var(--teal);display:block;line-height:1}
.steps strong{display:block;margin:.4rem 0 .3rem;font-family:var(--serif);font-size:1.2rem;font-weight:500}
.steps p{margin:0;color:var(--slate);font-size:.95rem}
@media (max-width:760px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.steps{grid-template-columns:1fr}}

/* Article layout */
.crumbs{font-size:.9rem;color:var(--slate);padding:1rem 0 0}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:.35rem}
.crumbs li+li::before{content:"/";margin-right:.35rem;color:var(--line)}
.crumbs a{color:var(--slate)}
.article-head{padding:1.25rem 0 1.75rem;border-bottom:1px solid var(--line)}
.article-head .kicker{color:var(--teal);font-size:.95rem;margin-bottom:.5rem}
.article-head .kicker a{text-decoration:none}
.article-head .standfirst{font-size:1.2rem;color:var(--slate);max-width:60ch;margin:.5rem 0 1rem}
.byline{display:flex;flex-wrap:wrap;gap:.35rem 1.4rem;font-size:.9rem;color:var(--slate)}
.byline b{font-weight:600;color:var(--ink)}
.level{display:inline-block;font-size:.82rem;border:1px solid var(--line);border-radius:999px;padding:.15rem .7rem;color:var(--slate);margin-top:.9rem;background:var(--field)}
.level-C{border-color:var(--amber);color:var(--amber);background:var(--amber-tint)}

.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:3.5rem;padding:2rem 0 3rem}
.article-body{max-width:var(--measure)}
.article-body h2{scroll-margin-top:1.5rem}
.article-body table{width:100%;border-collapse:collapse;font-size:.95rem;margin:1.2rem 0}
.article-body th,.article-body td{text-align:left;padding:.6rem .7rem;border-bottom:1px solid var(--line);vertical-align:top}
.article-body th{font-weight:600;background:var(--field)}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.aside{position:sticky;top:1.25rem;align-self:start;font-size:.93rem}
.toc{border-left:2px solid var(--line);padding-left:1rem;margin-bottom:2rem}
.toc strong{display:block;margin-bottom:.5rem;font-family:var(--serif);font-size:1.05rem;font-weight:500}
.toc ol{list-style:none;padding:0;margin:0}
.toc li{margin:0 0 .45rem}
.toc a{color:var(--slate);text-decoration:none}
.toc a:hover,.toc a.active{color:var(--teal)}
.related{margin-bottom:2rem}
.related strong{display:block;font-family:var(--serif);font-size:1.05rem;font-weight:500;margin-bottom:.4rem}
.related ul{list-style:none;padding:0;margin:0}
.related li{margin-bottom:.4rem}
@media (max-width:900px){.article-grid{grid-template-columns:1fr;gap:1.5rem}.aside{position:static}.toc{margin-top:1rem}}

/* Signature: quick answer */
.quick{border-left:4px solid var(--teal);background:var(--teal-tint);padding:1.1rem 1.35rem;margin:1.5rem 0 2rem;font-family:var(--serif);font-size:1.18rem;line-height:1.5}
.quick strong{display:block;font-family:var(--sans);font-weight:600;font-size:.88rem;color:var(--teal-dark);margin-bottom:.4rem}
.quick p:last-child{margin:0}

/* Callouts */
.callout{border:1px solid var(--line);border-left-width:4px;border-radius:0 var(--radius) var(--radius) 0;padding:1rem 1.2rem;margin:1.5rem 0;background:var(--field)}
.callout strong:first-child{display:block;margin-bottom:.3rem}
.callout p:last-child{margin:0}
.callout-doctor{border-left-color:var(--amber);background:var(--amber-tint)}
.callout-urgent{border-left-color:var(--red);background:var(--red-tint)}
.callout-note{border-left-color:var(--teal)}

/* Evidence badges */
.ev{display:inline-block;font-size:.8rem;padding:.1rem .55rem;border-radius:3px;border:1px solid var(--line);background:var(--field);white-space:nowrap}
.ev-strong{border-color:#2f6b3a;color:#2f6b3a;background:#e8f2ea}
.ev-moderate{border-color:var(--teal);color:var(--teal);background:var(--teal-tint)}
.ev-limited{border-color:var(--amber);color:var(--amber);background:var(--amber-tint)}
.ev-insufficient,.ev-mixed{border-color:var(--slate);color:var(--slate)}

/* Product card (Level B/C only) */
.product-card{border:1px solid var(--line);border-radius:var(--radius);padding:1.25rem;margin:2rem 0;display:grid;grid-template-columns:120px 1fr;gap:1.25rem;background:var(--paper)}
.product-card img{width:120px;height:120px;object-fit:contain}
.product-card h3{margin:0 0 .3rem;font-size:1.3rem}
.product-card dl{display:grid;grid-template-columns:auto 1fr;gap:.3rem .8rem;font-size:.93rem;margin:.6rem 0}
.product-card dt{color:var(--slate)}
.product-card dd{margin:0}
.product-card .disclose{font-size:.82rem;color:var(--slate);margin:.7rem 0 0}
@media (max-width:560px){.product-card{grid-template-columns:1fr}.product-card img{width:96px;height:96px}}

/* References */
.refs{font-size:.9rem;color:var(--slate)}
.refs ol{padding-left:1.3rem}
.refs li{margin-bottom:.45rem}

/* FAQ (details) */
details.faq{border-top:1px solid var(--line);padding:.7rem 0}
details.faq:last-of-type{border-bottom:1px solid var(--line)}
details.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:1rem}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";color:var(--teal);font-size:1.3rem;line-height:1}
details.faq[open] summary::after{content:"–"}
details.faq p{margin:.6rem 0 0}

/* Hub page */
.hub-intro{padding:1.5rem 0 2rem;border-bottom:1px solid var(--line)}
.hub-intro p{max-width:60ch;color:var(--slate);font-size:1.15rem}
.hub-section{padding:2rem 0;border-bottom:1px solid var(--line)}
.hub-section h2{margin-top:0;font-size:1.5rem}
.hub-section .intro{color:var(--slate);max-width:60ch}
.hub-section .list-plain li:last-child{border-bottom:0}

/* Footer */
.site-footer{margin-top:3rem;background:var(--field);border-top:1px solid var(--line);padding:2.5rem 0 2rem;font-size:.93rem;color:var(--slate)}
.site-footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2.5rem}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:.4rem}
.site-footer a{color:var(--slate);text-decoration:none}
.site-footer a:hover{color:var(--teal)}
.site-footer .brand{font-size:1.25rem}
.site-footer .fine{margin-top:2rem;padding-top:1.2rem;border-top:1px solid var(--line);font-size:.85rem;max-width:80ch}
@media (max-width:760px){.site-footer .cols{grid-template-columns:1fr;gap:1.5rem}}

/* Search page */
#results li{padding:.8rem 0;border-bottom:1px solid var(--line);list-style:none}
#results a{font-family:var(--serif);font-size:1.15rem;text-decoration:none}
#results .meta{color:var(--slate);font-size:.9rem;display:block}

/* Print */
@media print{
  .site-header,.site-footer,.aside,.crumbs,.skip,.product-card,.hdr-search{display:none!important}
  body{font-size:11pt;color:#000}
  a{color:#000;text-decoration:none}
  .article-grid{display:block}
  .quick{background:none;border-left:2pt solid #000}
}