/* Grout Atlas: mobile-first stylesheet */
:root{
  --ink:#18242f;--ink-2:#3a4855;--muted:#5d6a75;--paper:#fbf9f5;--card:#fff;
  --line:#e6e0d6;--line-2:#d6cec1;--accent:#a8482a;--accent-2:#7e3519;--accent-bg:#f8ebe4;
  --sage:#46655a;--sage-bg:#e9f0ec;--warn:#8a5a00;--warn-bg:#fdf3dc;--note-bg:#eef2f7;
  --radius:10px;--max:1180px;--measure:70ch;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --serif:Georgia,"Iowan Old Style","Palatino Linotype",Palatino,serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:5rem}
body{margin:0;font:1.0625rem/1.65 var(--font);color:var(--ink);background:var(--paper)}
img,svg{max-width:100%;height:auto}
a{color:var(--accent);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{color:var(--accent-2);text-decoration-thickness:2px}
:focus-visible{outline:3px solid #2f6fb0;outline-offset:2px;border-radius:3px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:.6rem 1rem;z-index:100}
.skip:focus{left:.5rem;top:.5rem}
.wrap{max-width:var(--max);margin:0 auto;padding:0 1.1rem}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.22;color:var(--ink);font-weight:700}
h1{font-size:clamp(1.85rem,5vw,2.75rem);margin:.3em 0 .4em;letter-spacing:-.01em}
h2{font-size:clamp(1.4rem,3.4vw,1.8rem);margin:2.2em 0 .6em}
h3{font-size:1.2rem;margin:1.6em 0 .5em}
p,ul,ol,dl{margin:0 0 1.1em}
li{margin:.3em 0}
hr{border:0;border-top:1px solid var(--line);margin:2rem 0}

/* header */
.site-header{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.hdr{display:flex;align-items:center;gap:.75rem;min-height:3.6rem}
.brand{display:flex;align-items:center;gap:.55rem;text-decoration:none;color:var(--ink);font-family:var(--serif);font-weight:700;font-size:1.22rem;margin-right:auto}
.brand:hover{color:var(--ink)}
.brand svg{width:30px;height:30px;flex:none}
.nav-toggle{list-style:none;cursor:pointer;padding:.45rem .75rem;border:1px solid var(--line-2);border-radius:8px;font-size:.93rem;font-weight:700;user-select:none;white-space:nowrap}
.nav-toggle::-webkit-details-marker{display:none}
.navd[open] .nav-toggle{background:var(--ink);color:#fff;border-color:var(--ink)}
.nav-panel{display:none;position:absolute;left:0;right:0;top:100%;background:var(--card);border-bottom:1px solid var(--line);box-shadow:0 12px 28px rgba(0,0,0,.1);padding:.6rem 1.1rem 1rem}
.navd[open] .nav-panel{display:block}
.nav-panel ul{list-style:none;margin:0 auto;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:0 1rem;max-width:var(--max)}
.nav-panel a{display:block;padding:.55rem 0;color:var(--ink);text-decoration:none;font-weight:600;font-size:.97rem;border-bottom:1px solid var(--line)}
.nav-panel a:hover,.nav-panel a[aria-current]{color:var(--accent)}
.quick{display:none}
.quick ul{list-style:none;margin:0;padding:0;display:flex;gap:1.05rem}
.quick a{color:var(--ink);text-decoration:none;font-weight:600;font-size:.93rem}
.quick a:hover,.quick a[aria-current]{color:var(--accent)}
.d-only{display:none}
.search-link{display:inline-flex;align-items:center;justify-content:center;width:2.4rem;height:2.4rem;border-radius:8px;color:var(--ink);border:1px solid var(--line-2);flex:none}
.search-link svg{width:18px;height:18px}
@media (min-width:640px){.nav-panel ul{grid-template-columns:repeat(3,1fr)}}
@media (min-width:1080px){
  .quick{display:block}.d-only{display:inline}.m-only{display:none}
  .nav-panel ul{grid-template-columns:repeat(4,1fr)}
}

/* breadcrumbs */
.crumbs{font-size:.88rem;color:var(--muted);margin:1.1rem 0 0}
.crumbs ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.25rem}
.crumbs li{margin:0}
.crumbs li+li::before{content:"/";margin-right:.3rem;color:var(--line-2)}
.crumbs a{color:var(--muted)}

/* article layout */
.layout{display:grid;gap:2rem;padding-bottom:3rem}
@media (min-width:1000px){.layout{grid-template-columns:minmax(0,1fr) 290px;gap:3rem}}
.article{min-width:0;max-width:var(--measure)}
.article-head{border-bottom:1px solid var(--line);padding-bottom:1rem;margin-bottom:1.4rem}
.meta{display:flex;flex-wrap:wrap;gap:.35rem 1.1rem;font-size:.9rem;color:var(--muted);margin:0}
.meta span{display:inline-flex;align-items:center;gap:.3rem}
.lede{font-size:1.16rem;line-height:1.6;color:var(--ink)}
.article h2{scroll-margin-top:5rem;padding-top:.2rem}
.article h2::before{content:"";display:block;width:2.2rem;height:3px;background:var(--accent);margin-bottom:.7rem;border-radius:2px}
.article ul,.article ol{padding-left:1.3rem}

.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:.2rem 1rem;margin:0 0 1.6rem}
.toc summary{cursor:pointer;font-weight:700;padding:.65rem 0}
.toc ol{margin:0 0 .8rem;padding-left:1.2rem;font-size:.95rem}
.toc a{color:var(--ink-2);text-decoration:none}
.toc a:hover{color:var(--accent);text-decoration:underline}
.aside{display:flex;flex-direction:column;gap:1.2rem}
@media (min-width:1000px){.aside .toc-side{position:sticky;top:5rem}}
.toc-side{display:none}
@media (min-width:1000px){.toc-inline{display:none}.toc-side{display:block}}
.side-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1rem 1.1rem;font-size:.95rem}
.side-box h2{font-size:1rem;margin:0 0 .6rem;font-family:var(--font)}
.side-box h2::before{display:none}
.side-box ul{list-style:none;padding:0;margin:0}
.side-box li{margin:.15rem 0;padding:.25rem 0;border-top:1px solid var(--line)}
.side-box li:first-child{border-top:0}
.side-box a{text-decoration:none;color:var(--ink-2)}
.side-box a:hover{color:var(--accent)}
.side-box a[aria-current]{color:var(--accent);font-weight:700}

/* blocks */
.takeaways{background:var(--sage-bg);border:1px solid #cfdcd4;border-radius:var(--radius);padding:1rem 1.2rem .3rem;margin:1.4rem 0 1.8rem}
.takeaways h2{font-size:1.1rem;margin:0 0 .5rem;font-family:var(--font);color:var(--sage)}
.takeaways h2::before{display:none}
.callout{border-left:4px solid var(--sage);background:var(--card);border-radius:0 var(--radius) var(--radius) 0;padding:.85rem 1.1rem;margin:1.4rem 0;box-shadow:0 1px 0 var(--line)}
.callout p:last-child{margin-bottom:0}
.callout.tip{border-color:var(--sage);background:var(--sage-bg)}
.callout.warning{border-color:#c48a00;background:var(--warn-bg)}
.callout.note{border-color:#5e7fa3;background:var(--note-bg)}
.field-note{position:relative;background:#fff;border:1px dashed var(--line-2);border-radius:var(--radius);padding:1rem 1.15rem .3rem;margin:1.6rem 0}
.fn-label{font-size:.75rem;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:var(--accent);margin:0 0 .35rem}
.verdict{background:var(--accent-bg);border:1px solid #ecc9b9;border-radius:var(--radius);padding:.9rem 1.15rem;margin:1.5rem 0}
.verdict p:last-child{margin:0}
ol.steps{counter-reset:s;list-style:none;padding-left:0}
ol.steps>li{counter-increment:s;position:relative;padding:0 0 1rem 2.9rem;margin:0}
ol.steps>li::before{content:counter(s);position:absolute;left:0;top:-.05rem;width:2rem;height:2rem;border-radius:50%;background:var(--ink);color:#fff;font-weight:700;font-size:.95rem;display:flex;align-items:center;justify-content:center}
.table-wrap{overflow-x:auto;margin:1.4rem 0;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:.93rem;line-height:1.45}
caption{caption-side:top;text-align:left;font-weight:700;padding:.75rem .9rem;font-size:.95rem;border-bottom:1px solid var(--line)}
th,td{padding:.55rem .8rem;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
thead th{background:#f3efe8;font-weight:700;white-space:nowrap}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
tbody th{font-weight:600}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.faq .qa{border-top:1px solid var(--line);padding-top:.4rem}
.faq .qa h3{font-family:var(--font);font-size:1.05rem;margin:.8rem 0 .35rem}
.sources{font-size:.93rem;color:var(--ink-2)}
.sources h2{font-size:1.25rem}
.page-foot{margin-top:2.5rem;padding-top:1.2rem;border-top:1px solid var(--line);font-size:.92rem;color:var(--muted)}
.related{margin-top:2.4rem}
.related h2{font-size:1.35rem}
.prevnext{display:grid;gap:.8rem;margin-top:2rem}
@media(min-width:640px){.prevnext{grid-template-columns:1fr 1fr}}
.prevnext a{display:block;border:1px solid var(--line);background:var(--card);border-radius:var(--radius);padding:.8rem 1rem;text-decoration:none;color:var(--ink)}
.prevnext small{display:block;color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.06em}
.prevnext .next{text-align:right}

/* cards */
.cards{display:grid;gap:1rem;grid-template-columns:1fr;margin:1.2rem 0}
@media(min-width:620px){.cards{grid-template-columns:1fr 1fr}}
@media(min-width:1000px){.cards.c3{grid-template-columns:repeat(3,1fr)}}
.card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.05rem 1.15rem;text-decoration:none;color:var(--ink);transition:border-color .15s,box-shadow .15s}
a.card:hover{border-color:var(--line-2);box-shadow:0 6px 18px rgba(24,36,47,.07);color:var(--ink)}
.card h3{font-size:1.08rem;margin:0 0 .35rem;font-family:var(--font)}
.card p{margin:0;font-size:.94rem;color:var(--ink-2)}
.card .kicker{font-size:.74rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:.35rem}
.card .go{margin-top:auto;padding-top:.6rem;font-weight:700;font-size:.9rem;color:var(--accent)}

/* home */
.hero{background:var(--ink);color:#f3efe8;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.06) 2px,transparent 2px),linear-gradient(90deg,rgba(255,255,255,.06) 2px,transparent 2px);background-size:56px 56px;mask-image:linear-gradient(90deg,transparent,#000 70%);-webkit-mask-image:linear-gradient(90deg,transparent,#000 70%)}
.hero .wrap{position:relative;padding-top:3rem;padding-bottom:3rem}
.hero h1{color:#fff;max-width:20ch;margin-top:0}
.hero p{max-width:58ch;font-size:1.12rem;color:#dfe5ea}
.eyebrow{font-size:.78rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:#f0b49c;margin:0 0 .6rem}
.searchbox{display:flex;gap:.5rem;max-width:560px;margin-top:1.4rem;position:relative}
.searchbox input{flex:1;min-width:0;font:inherit;padding:.8rem 1rem;border-radius:9px;border:1px solid var(--line-2);background:#fff;color:var(--ink)}
.searchbox button{font:inherit;font-weight:700;padding:.8rem 1.1rem;border-radius:9px;border:0;background:var(--accent);color:#fff;cursor:pointer}
.searchbox button:hover{background:var(--accent-2)}
.results{list-style:none;padding:0;margin:1rem 0 0;max-width:720px}
.results li{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:.8rem 1rem;margin:.5rem 0}
.results a{font-weight:700}
.results p{margin:.2rem 0 0;font-size:.93rem;color:var(--ink-2)}
.hero .results li{color:var(--ink)}
.section{padding:2.6rem 0}
.section.alt{background:#f3efe8;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section h2{margin-top:0}
.section-intro{max-width:62ch;color:var(--ink-2)}
.symptoms{display:grid;gap:.6rem;grid-template-columns:1fr 1fr;margin:1.2rem 0}
@media(min-width:800px){.symptoms{grid-template-columns:repeat(4,1fr)}}
.symptoms a{display:flex;align-items:center;gap:.6rem;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:.8rem .9rem;text-decoration:none;color:var(--ink);font-weight:600;font-size:.95rem;line-height:1.3}
.symptoms a:hover{border-color:var(--accent);color:var(--accent)}
.sw{width:26px;height:26px;flex:none;border-radius:5px;border:1px solid var(--line-2)}
.stat-row{display:grid;gap:1rem;grid-template-columns:1fr;margin-top:1.2rem}
@media(min-width:760px){.stat-row{grid-template-columns:repeat(3,1fr)}}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem}
.stat b{display:block;font-family:var(--serif);font-size:1.9rem;color:var(--accent);line-height:1.1}
.stat span{font-size:.93rem;color:var(--ink-2)}
.trust{display:grid;gap:1rem;grid-template-columns:1fr;margin-top:1rem}
@media(min-width:760px){.trust{grid-template-columns:repeat(3,1fr)}}
.trust div{border-top:3px solid var(--sage);padding-top:.7rem}
.trust h3{margin:0 0 .3rem;font-size:1.05rem;font-family:var(--font)}
.trust p{margin:0;font-size:.94rem;color:var(--ink-2)}
.hub-intro{max-width:var(--measure)}
.hub-list{counter-reset:h}

/* tools */
.tool{background:var(--card);border:1px solid var(--line-2);border-radius:14px;padding:1.2rem;margin:1.4rem 0 2rem;box-shadow:0 2px 0 var(--line)}
.tool h2{margin-top:0;font-size:1.25rem}
.tool h2::before{display:none}
.fields{display:grid;gap:.9rem;grid-template-columns:1fr 1fr}
.fields .full{grid-column:1/-1}
.field label,.field legend{display:block;font-weight:700;font-size:.9rem;margin-bottom:.3rem}
.field input,.field select{width:100%;font:inherit;font-size:1rem;padding:.6rem .7rem;border:1px solid var(--line-2);border-radius:8px;background:#fff;color:var(--ink)}
.field small{display:block;color:var(--muted);font-size:.82rem;margin-top:.25rem;line-height:1.4}
fieldset.field{border:0;padding:0;margin:0}
.choices{display:flex;flex-wrap:wrap;gap:.4rem}
.choices label{font-weight:500;display:inline-flex;align-items:center;gap:.35rem;border:1px solid var(--line-2);border-radius:999px;padding:.35rem .75rem;cursor:pointer;font-size:.92rem;margin:0}
.choices input{width:auto;margin:0}
.choices label:has(input:checked){background:var(--ink);color:#fff;border-color:var(--ink)}
.btn{font:inherit;font-weight:700;padding:.7rem 1.15rem;border-radius:9px;border:0;background:var(--accent);color:#fff;cursor:pointer}
.btn:hover{background:var(--accent-2)}
.btn.secondary{background:#fff;color:var(--ink);border:1px solid var(--line-2)}
.out{margin-top:1.2rem;border-top:1px solid var(--line);padding-top:1rem}
.out-grid{display:grid;gap:.7rem;grid-template-columns:1fr 1fr}
@media(min-width:700px){.out-grid{grid-template-columns:repeat(4,1fr)}}
.out-item{background:var(--paper);border:1px solid var(--line);border-radius:9px;padding:.7rem .8rem}
.out-item b{display:block;font-size:1.35rem;font-family:var(--serif);color:var(--ink)}
.out-item span{font-size:.82rem;color:var(--muted)}
.out .explain{font-size:.93rem;color:var(--ink-2);margin-top:.8rem}
.rec{border:1px solid var(--line);border-radius:10px;padding:1rem;margin:.7rem 0;background:var(--paper)}
.rec h3{margin:0 0 .3rem;font-family:var(--font);font-size:1.1rem}
.rec.top{border-color:var(--accent);background:var(--accent-bg)}
.badge{display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;background:var(--accent);color:#fff;border-radius:4px;padding:.15rem .45rem;margin-left:.3rem;vertical-align:middle}
.viz-wrap{display:grid;gap:1rem}
@media(min-width:820px){.viz-wrap{grid-template-columns:1fr 320px}}
.viz{border-radius:10px;overflow:hidden;border:1px solid var(--line-2);background:#ccc;aspect-ratio:4/3}
.viz svg{display:block;width:100%;height:100%}
.swatches{display:flex;flex-wrap:wrap;gap:.35rem}
.swatches button{width:2rem;height:2rem;border-radius:6px;border:2px solid #fff;box-shadow:0 0 0 1px var(--line-2);cursor:pointer;padding:0}
.swatches button[aria-pressed="true"]{box-shadow:0 0 0 3px var(--ink)}
.timeline{list-style:none;padding:0;margin:0;border-left:3px solid var(--line-2)}
.timeline li{position:relative;padding:.2rem 0 .9rem 1.1rem;margin:0}
.timeline li::before{content:"";position:absolute;left:-8px;top:.45rem;width:13px;height:13px;border-radius:50%;background:var(--accent);border:2px solid #fff}
.timeline b{display:block}
.timeline span{font-size:.92rem;color:var(--ink-2)}

/* glossary */
.az{display:flex;flex-wrap:wrap;gap:.3rem;margin:1rem 0 1.5rem}
.az a{display:inline-flex;width:2.1rem;height:2.1rem;align-items:center;justify-content:center;border:1px solid var(--line-2);border-radius:6px;text-decoration:none;font-weight:700;background:var(--card)}
dl.glossary dt{font-weight:700;font-size:1.05rem;margin-top:1.1rem;scroll-margin-top:5rem}
dl.glossary dd{margin:.2rem 0 0;padding-left:0;color:var(--ink-2)}
dl.glossary dt:target{background:var(--warn-bg)}

/* footer */
.site-footer{background:var(--ink);color:#c9d1d8;padding:2.6rem 0 2rem;font-size:.94rem}
.site-footer a{color:#e8edf1;text-decoration:none}
.site-footer a:hover{text-decoration:underline;color:#fff}
.fgrid{display:grid;gap:1.6rem;grid-template-columns:1fr 1fr}
@media(min-width:900px){.fgrid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.fgrid h2{color:#fff;font-size:.95rem;font-family:var(--font);margin:0 0 .6rem;letter-spacing:.04em;text-transform:uppercase}
.fgrid ul{list-style:none;margin:0;padding:0}
.fgrid li{margin:.35rem 0}
.fbrand{grid-column:1/-1}
@media(min-width:900px){.fbrand{grid-column:auto}}
.fbottom{border-top:1px solid #33424f;margin-top:2rem;padding-top:1rem;font-size:.85rem;color:#9aa7b2}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media print{.site-header,.site-footer,.aside,.toc,.prevnext{display:none}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}