/* ============================================================
   Microbiome Friendly — portal stylesheet
   Tokens = the microbiomefriendly.me design system (docs/BRAND_IMAGE_SPEC.md §4).
   Laws: one display family per surface; no positive letter-spacing (§4h);
   numbers never split from units (§4h-2); no monospace numbers; IBM Plex Mono never.
   ============================================================ */
:root{
  --navy:#1B3856; --navy-line:#3A567A;
  --ivory:#F1EADC; --ivory2:#E7DECB; --science:#FBFAF6;
  --ink:#16203A; --ink-2:#565E78; --line:#D9CFBC;
  --gold:#C7A24B; --green:#2F7D55; --violet:#6B5CCB; --teal:#178B7A; --coral:#E2725B;
  --display:'Bricolage Grotesque',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --sans:'Hanken Grotesk',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --r-sm:8px; --r-md:14px; --r-lg:22px; --r-pill:999px;
  --maxw:1240px; --prose:72ch;
  --shadow:0 18px 40px rgba(16,23,52,.10); --shadow-sm:0 6px 18px rgba(16,23,52,.08);
}
/* Script fallbacks: the brand faces carry no CJK / Arabic / Thai glyphs — system faces per script, no second display family */
:lang(ja){--display:'Hiragino Sans','Yu Gothic','Noto Sans JP',system-ui,sans-serif;--sans:'Hiragino Sans','Yu Gothic','Noto Sans JP',system-ui,sans-serif;}
:lang(ko){--display:'Apple SD Gothic Neo','Malgun Gothic','Noto Sans KR',system-ui,sans-serif;--sans:'Apple SD Gothic Neo','Malgun Gothic','Noto Sans KR',system-ui,sans-serif;}
:lang(zh-Hans){--display:'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;--sans:'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;}
:lang(ar){--display:'Segoe UI','Noto Naskh Arabic','Geeza Pro',system-ui,sans-serif;--sans:'Segoe UI','Noto Naskh Arabic','Geeza Pro',system-ui,sans-serif;}
:lang(th){--display:'Leelawadee UI','Thonburi','Noto Sans Thai',system-ui,sans-serif;--sans:'Leelawadee UI','Thonburi','Noto Sans Thai',system-ui,sans-serif;}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{margin:0;background:var(--ivory);color:var(--ink);font-family:var(--sans);font-weight:500;font-size:16px;line-height:1.62;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;font-variant-numeric:tabular-nums;}
::selection{background:var(--navy);color:var(--ivory);}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{margin:0;}
sup{font-size:.6em;}
.num,.nowrap{white-space:nowrap;}
[dir="rtl"] .kicker::before{margin-inline-end:11px;}

/* ---------- typography ---------- */
.h1{font-family:var(--display);font-weight:800;letter-spacing:-0.03em;line-height:1.02;font-size:clamp(30px,3.9vw,52px);}
.h2{font-family:var(--display);font-weight:700;letter-spacing:-0.02em;line-height:1.08;font-size:clamp(23px,2.5vw,32px);}
.h3{font-family:var(--display);font-weight:700;letter-spacing:-0.015em;line-height:1.14;font-size:clamp(18px,1.5vw,21px);}
:lang(ja) .h1,:lang(ko) .h1,:lang(zh-Hans) .h1,:lang(ar) .h1,:lang(th) .h1,
:lang(ja) .h2,:lang(ko) .h2,:lang(zh-Hans) .h2,:lang(ar) .h2,:lang(th) .h2{letter-spacing:0;line-height:1.25;}
.lead{font-weight:500;font-size:clamp(17px,1.55vw,21px);line-height:1.5;max-width:64ch;}
.muted{color:var(--ink-2);}
.kicker{font-weight:700;font-size:12px;letter-spacing:0;text-transform:uppercase;color:var(--ink-2);display:flex;align-items:center;gap:11px;margin-bottom:18px;}
.kicker::before{content:"";width:26px;height:2px;background:currentColor;opacity:.4;display:inline-block;flex:none;}
:lang(ja) .kicker,:lang(ko) .kicker,:lang(zh-Hans) .kicker,:lang(ar) .kicker,:lang(th) .kicker{text-transform:none;}
.label{font-weight:700;font-size:11px;text-transform:uppercase;color:var(--ink-2);}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 6%;}
.wrap--narrow{max-width:900px;}
.section{padding:72px 0;}
.section--tight{padding:44px 0;}
.dark{background:var(--navy);color:#fff;}
.dark .muted{color:rgba(255,255,255,.66);}
.dark .kicker{color:rgba(255,255,255,.62);}
.ivory2{background:var(--ivory2);}
.science-bg{background:var(--science);}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:40;background:rgba(241,234,220,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.hdr__in{max-width:var(--maxw);margin:0 auto;padding:12px 6%;display:flex;align-items:center;gap:22px;}
.hdr__logo img{height:44px;width:auto;}
.hdr__nav{display:flex;gap:18px;font-weight:700;font-size:15px;}
.hdr__nav a{padding:6px 0;border-bottom:2px solid transparent;}
.hdr__nav a[aria-current="page"],.hdr__nav a:hover{border-color:var(--gold);}
.hdr__lang{margin-inline-start:auto;position:relative;}
.hdr__lang summary{list-style:none;cursor:pointer;font-weight:700;font-size:13px;padding:8px 14px;border:1.5px solid var(--navy);border-radius:var(--r-pill);display:inline-flex;gap:8px;align-items:center;}
.hdr__lang summary::-webkit-details-marker{display:none;}
.hdr__lang ul{position:absolute;inset-inline-end:0;top:calc(100% + 8px);background:var(--science);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow);list-style:none;margin:0;padding:8px;min-width:220px;max-height:70vh;overflow:auto;columns:2;column-gap:0;}
.hdr__lang li{break-inside:avoid;}
.hdr__lang li a,.hdr__lang li span{display:block;padding:7px 12px;border-radius:var(--r-sm);font-size:14px;font-weight:600;}
.hdr__lang li a:hover{background:var(--ivory2);}
.hdr__lang li span{color:var(--ink-2);opacity:.55;}
.hdr__lang li a[aria-current="true"]{background:var(--navy);color:#fff;}
@media(max-width:820px){.hdr__nav{display:none;}.hdr__in{gap:12px;}}

/* ---------- hero (home) ---------- */
.hero{background:var(--navy);color:#fff;padding:64px 0 56px;}
.hero h1{font-family:var(--display);font-weight:800;letter-spacing:-0.035em;line-height:.96;font-size:clamp(38px,6vw,78px);max-width:16ch;}
.hero .sub{font-size:clamp(17px,1.6vw,21px);line-height:1.5;max-width:56ch;color:rgba(255,255,255,.8);margin-top:18px;}
.pill{display:inline-block;padding:6px 12px;border-radius:var(--r-pill);border:1px solid rgba(255,255,255,.35);font-size:13px;font-weight:600;margin:6px 6px 0 0;}

/* ---------- cards (Marika slot: preview 3:2, 3-up desktop / 1-up mobile) ---------- */
.grid{display:grid;gap:24px;}
.g3{grid-template-columns:repeat(3,minmax(0,1fr));}
.g2{grid-template-columns:repeat(2,minmax(0,1fr));}
@media(max-width:980px){.g3{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media(max-width:640px){.g3,.g2{grid-template-columns:1fr;}}
.card{background:var(--science);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;display:flex;flex-direction:column;transition:transform .25s ease,box-shadow .25s ease;}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.card-cover{aspect-ratio:3/2;background:var(--ivory2);overflow:hidden;}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.card:hover .card-cover img{transform:scale(1.03);}
.card-cover--empty{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--ivory2),var(--science));}
.card-cover--empty svg{width:64px;height:64px;color:var(--navy);opacity:.35;}
.card__b{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px;flex:1;}
.card__b .kicker{margin-bottom:4px;}
.card__b h3{font-family:var(--display);font-weight:700;font-size:19px;line-height:1.18;letter-spacing:-0.01em;}
.card__b p{margin:0;color:var(--ink-2);font-size:15px;}
.card__meta{margin-top:auto;font-size:13px;color:var(--ink-2);display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- article ---------- */
.article{padding:48px 0 72px;}
.article header{max-width:var(--prose);}
.article .h1{margin:10px 0 18px;}
.answer{font-size:clamp(17px,1.5vw,20px);line-height:1.55;font-weight:600;border-inline-start:4px solid var(--gold);padding:6px 0 6px 18px;margin:0 0 22px;max-width:var(--prose);}
[dir="rtl"] .answer{padding:6px 18px 6px 0;}
.byline{display:flex;gap:14px;align-items:center;flex-wrap:wrap;font-size:14px;color:var(--ink-2);margin-bottom:26px;}
.byline img{width:40px;height:40px;border-radius:50%;object-fit:cover;}
.byline strong{color:var(--ink);}
.article-hero{aspect-ratio:16/9;background:var(--ivory2);border-radius:var(--r-lg);overflow:hidden;margin:0 0 34px;}
.article-hero img{width:100%;height:100%;object-fit:cover;}
.article-hero figcaption{font-size:13px;color:var(--ink-2);padding:8px 2px 0;}
.prose{max-width:var(--prose);font-size:17px;line-height:1.7;}
.prose h2{font-family:var(--display);font-weight:700;font-size:clamp(22px,2.2vw,28px);line-height:1.15;letter-spacing:-0.02em;margin:38px 0 12px;}
.prose h3{font-family:var(--display);font-weight:700;font-size:20px;line-height:1.2;margin:28px 0 8px;}
:lang(ja) .prose h2,:lang(ko) .prose h2,:lang(zh-Hans) .prose h2,:lang(ar) .prose h2,:lang(th) .prose h2{letter-spacing:0;line-height:1.3;}
.prose p{margin:0 0 18px;}
.prose ul,.prose ol{padding-inline-start:22px;margin:0 0 18px;}
.prose li{margin:0 0 8px;}
.prose a{color:var(--navy);text-decoration:underline;text-decoration-color:var(--gold);text-underline-offset:3px;}
.prose blockquote{margin:0 0 18px;padding:12px 18px;border-inline-start:3px solid var(--teal);background:var(--science);border-radius:var(--r-sm);}
.prose table{border-collapse:collapse;width:100%;margin:0 0 20px;font-size:15px;}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:8px 10px;text-align:start;vertical-align:top;}
.prose th{font-weight:700;}
.prose td.num,.prose th.num{white-space:nowrap;width:1%;}
.prose sup a{color:var(--navy);text-decoration:none;font-weight:700;}
.prose .caveat{background:var(--ivory2);border-radius:var(--r-md);padding:14px 18px;}

/* key facts · faq · sources */
.facts{background:var(--science);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 24px;margin:26px 0;max-width:var(--prose);}
.facts h2,.faq h2,.sources h2{font-family:var(--display);font-weight:700;font-size:20px;margin:0 0 12px;}
.facts ul{margin:0;padding-inline-start:20px;}
.facts li{margin:0 0 8px;}
.faq{max-width:var(--prose);margin:34px 0;}
.faq details{border-bottom:1px solid var(--line);padding:10px 0;}
.faq summary{cursor:pointer;font-weight:700;font-size:17px;list-style:none;display:flex;justify-content:space-between;gap:12px;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:"+";color:var(--gold);font-weight:800;}
.faq details[open] summary::after{content:"–";}
.faq details p{margin:10px 0 4px;color:var(--ink-2);}
.sources{max-width:var(--prose);margin:34px 0 0;padding-top:18px;border-top:1px solid var(--line);font-size:14px;}
.sources ol{padding-inline-start:20px;margin:0;}
.sources li{margin:0 0 8px;color:var(--ink-2);}
.sources a{color:var(--navy);text-decoration:underline;text-decoration-color:var(--gold);word-break:break-all;}
.entity{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:15px;background:var(--ivory2);border-radius:var(--r-md);padding:16px 20px;margin:0 0 26px;max-width:var(--prose);}
.entity dt{font-weight:700;color:var(--ink-2);}
.entity dd{margin:0;}
.rail{margin-top:56px;}
.rail h2{font-family:var(--display);font-weight:700;font-size:22px;margin-bottom:18px;}

/* ---------- lists / index ---------- */
.index-row{display:grid;grid-template-columns:120px 1fr;gap:18px;padding:16px 0;border-bottom:1px solid var(--line);align-items:start;}
.index-row .thumb{aspect-ratio:3/2;border-radius:var(--r-sm);overflow:hidden;background:var(--ivory2);}
.index-row .thumb img{width:100%;height:100%;object-fit:cover;}
.index-row h3{font-family:var(--display);font-weight:700;font-size:19px;line-height:1.2;}
.index-row p{margin:6px 0 0;color:var(--ink-2);font-size:15px;}
@media(max-width:640px){.index-row{grid-template-columns:90px 1fr;}}
.topic-list{display:flex;flex-wrap:wrap;gap:10px;margin:0;padding:0;list-style:none;}
.topic-list a{display:inline-block;padding:9px 16px;border-radius:var(--r-pill);border:1.5px solid var(--navy);font-weight:700;font-size:14px;}
.topic-list a:hover,.topic-list a[aria-current="page"]{background:var(--navy);color:#fff;}
.breadcrumb{font-size:13px;color:var(--ink-2);display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px;}
.breadcrumb a:hover{color:var(--navy);}
.notice{background:var(--science);border:1px dashed var(--line);border-radius:var(--r-md);padding:16px 20px;color:var(--ink-2);}

/* ---------- footer ---------- */
.ftr{background:var(--navy);color:#fff;padding:56px 0 28px;margin-top:40px;}
.ftr__top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}
@media(max-width:820px){.ftr__top{grid-template-columns:1fr 1fr;}}
@media(max-width:520px){.ftr__top{grid-template-columns:1fr;}}
.ftr h4{font-family:var(--display);font-weight:700;font-size:15px;margin:0 0 12px;color:rgba(255,255,255,.7);}
.ftr a{display:block;padding:4px 0;color:rgba(255,255,255,.9);font-size:15px;}
.ftr a:hover{color:var(--gold);}
.ftr .brandline{color:rgba(255,255,255,.7);max-width:36ch;margin-top:12px;font-size:15px;}
.disclaimer{margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.62);font-size:13px;max-width:90ch;}
.ftr__bottom{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:18px;font-size:13px;color:rgba(255,255,255,.55);}
.ftr__langs{display:flex;flex-wrap:wrap;gap:4px 14px;margin-top:8px;}
.ftr__langs a{display:inline;padding:0;font-size:13px;}