:root{
  --ink:#171815;--soft-ink:#55564f;--ivory:#f5f0e8;--paper:#fbf8f2;--sage:#849080;
  --olive:#596253;--sand:#d8c9b6;--line:rgba(23,24,21,.14);--white:#fff;
  --font:"Avenir Next",Avenir,"Helvetica Neue",Arial,sans-serif;
  --radius:26px;--shadow:0 24px 80px rgba(30,31,26,.10)
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased;padding-bottom:92px}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:16px;top:16px;z-index:1000;background:#fff;padding:12px 16px;border-radius:10px}.wrap{width:min(1380px,calc(100% - 64px));margin:auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(251,248,242,.88);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.nav-shell{height:82px;width:min(1480px,calc(100% - 48px));margin:auto;display:flex;align-items:center;gap:36px}.brand{font-size:24px;font-weight:600;letter-spacing:-.03em;color:var(--ink);text-decoration:none}.brand sup{font-size:10px;top:-.8em;position:relative}.nav-shell nav{margin-left:auto;display:flex;gap:36px}.nav-shell nav a{color:var(--soft-ink);text-decoration:none;font-size:15px;font-weight:500}.nav-shell nav a[aria-current="page"]{color:var(--ink)}.nav-cta{background:var(--ink);color:#fff;text-decoration:none;padding:14px 20px;border-radius:999px;font-size:14px;font-weight:600}.nav-toggle{display:none}.hero{min-height:610px;display:flex;align-items:center;position:relative;overflow:hidden;background:var(--ivory)}.hero-inner{position:relative;z-index:2;padding:96px 0}.eyebrow{font-size:12px;text-transform:uppercase;letter-spacing:.16em;font-weight:700;color:var(--olive);margin:0 0 20px}.hero h1{font-size:clamp(58px,7vw,108px);line-height:.96;letter-spacing:-.065em;font-weight:500;max-width:1200px;margin:0}.hero h1 em{font-style:normal;color:var(--sage)}.hero-copy{font-size:21px;line-height:1.6;max-width:760px;color:var(--soft-ink);margin:34px 0}.hero-meta{display:flex;gap:34px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:24px}.hero-meta span{font-size:14px;color:var(--soft-ink)}.hero-meta strong{color:var(--ink);font-size:17px;margin-right:5px}.hero-glow{position:absolute;border-radius:50%;filter:blur(2px)}.glow-one{width:560px;height:560px;background:radial-gradient(circle,rgba(132,144,128,.28),transparent 66%);right:-120px;top:-180px}.glow-two{width:420px;height:420px;background:radial-gradient(circle,rgba(216,201,182,.42),transparent 68%);right:280px;bottom:-220px}.explorer-section{padding:120px 0}.section-intro{max-width:820px;margin-bottom:44px}.section-intro h2,.evidence-position h2,.unknowns h2{font-size:clamp(42px,5vw,72px);line-height:1.04;letter-spacing:-.05em;font-weight:500;margin:0 0 18px}.section-intro>p:last-child{font-size:18px;color:var(--soft-ink);line-height:1.6}.topic-tabs{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:34px}.topic-tabs button{font:600 13px var(--font);letter-spacing:.05em;text-transform:uppercase;color:#686a64;background:transparent;border:1.5px solid #a2a49f;border-radius:999px;padding:16px 21px;cursor:pointer;transition:.25s}.topic-tabs button span{opacity:.55;margin-right:7px}.topic-tabs button:hover{border-color:var(--ink);color:var(--ink)}.topic-tabs button[aria-selected="true"]{background:var(--ink);border-color:var(--ink);color:#fff;box-shadow:0 10px 30px rgba(23,24,21,.16)}.topic-panel{background:var(--ink);color:#fff;border-radius:32px;min-height:690px;display:grid;grid-template-columns:1.05fr .95fr;overflow:hidden;box-shadow:var(--shadow)}.topic-copy{padding:64px 58px}.topic-index{font-size:13px;letter-spacing:.18em;color:#a8aca4;margin:0 0 18px}.topic-copy>h2{font-size:clamp(48px,5vw,82px);font-weight:500;letter-spacing:-.055em;line-height:1;margin:0 0 22px}.topic-lead{font-size:19px;line-height:1.6;color:#c9cbc5;max-width:680px;margin:0 0 38px}.accordion{border-top:1px solid rgba(255,255,255,.16)}.accordion details{border-bottom:1px solid rgba(255,255,255,.16)}.accordion summary{list-style:none;cursor:pointer;padding:23px 4px;display:grid;grid-template-columns:50px 1fr 26px;align-items:center;font-size:19px;font-weight:600}.accordion summary::-webkit-details-marker{display:none}.accordion summary .num{color:#7f847b;font-size:13px}.accordion summary .plus{font-size:25px;font-weight:300;transition:.2s}.accordion details[open] .plus{transform:rotate(45deg)}.accordion .answer{padding:0 34px 26px 54px;color:#c7c9c3;line-height:1.65;font-size:16px}.accordion .answer strong{color:#fff}.accordion .source-link{display:inline-flex;color:#fff;text-decoration:none;border-bottom:1px solid rgba(255,255,255,.4);padding-bottom:3px;margin-top:8px}.topic-visual{background:linear-gradient(160deg,#dcd2c3,#aab3a6);padding:48px;display:flex;flex-direction:column;justify-content:center}.visual-frame{position:relative;min-height:470px;border-radius:28px;background:rgba(255,255,255,.20);border:1px solid rgba(255,255,255,.35);overflow:hidden;display:grid;place-items:center;backdrop-filter:blur(14px)}.centre-symbol{width:150px;height:150px;border-radius:50%;display:grid;place-items:center;background:rgba(23,24,21,.92);color:#fff;font-size:62px;font-weight:500;box-shadow:0 25px 65px rgba(0,0,0,.22);z-index:3}.orbit{position:absolute;border:1px solid rgba(23,24,21,.26);border-radius:50%}.orbit-a{width:320px;height:320px}.orbit-b{width:460px;height:460px}.signal{position:absolute;padding:10px 14px;background:rgba(255,255,255,.70);border-radius:999px;font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:#30322e}.signal-a{top:18%;left:12%}.signal-b{top:17%;right:11%}.signal-c{bottom:18%;left:14%}.signal-d{bottom:17%;right:12%}.visual-caption{font-size:14px;line-height:1.5;color:#31342f;margin-top:22px;max-width:600px}.visual-frame.metabolic::before,.visual-frame.gut::before,.visual-frame.mechanism::before,.visual-frame.trials::before,.visual-frame.archive::before,.visual-frame.satiety::before{content:"";position:absolute;width:260px;height:340px;border:2px solid rgba(23,24,21,.45);border-radius:48% 52% 42% 58%/38% 41% 59% 62%;transform:rotate(-12deg)}.visual-frame.gut::before{border-radius:45% 55% 54% 46%;width:290px;height:290px;box-shadow:inset 0 0 0 28px rgba(23,24,21,.08)}.visual-frame.mechanism::before{width:360px;height:160px;border-radius:999px;transform:none}.visual-frame.trials::before{width:300px;height:390px;border-radius:18px;transform:none}.visual-frame.archive::before{width:290px;height:360px;border-radius:8px;transform:rotate(7deg);box-shadow:-26px 22px 0 rgba(255,255,255,.24),-52px 42px 0 rgba(23,24,21,.08)}.visual-frame.satiety::before{width:340px;height:340px;border-radius:50%;transform:none}.evidence-position{background:#e9e1d5;padding:112px 0}.position-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:22px;align-items:stretch}.position-grid>div:first-child{padding-right:24px}.position-card{background:rgba(255,255,255,.62);border:1px solid rgba(23,24,21,.1);padding:30px;border-radius:22px}.position-card h3{font-size:24px;line-height:1.2;margin:18px 0 12px}.position-card p{font-size:15px;color:var(--soft-ink);line-height:1.65;margin:0}.position-label{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:8px 10px;border-radius:999px}.supported{background:#dce8d9;color:#38513a}.developing{background:#ece3c8;color:#645724}.not-established{background:#ead9d2;color:#6a4338}.unknowns{padding:120px 0}.unknowns-inner{display:grid;grid-template-columns:.9fr 1.1fr;gap:88px}.unknown-list{border-top:1px solid var(--line)}.unknown-list article{display:grid;grid-template-columns:50px 180px 1fr;gap:20px;padding:28px 0;border-bottom:1px solid var(--line);align-items:start}.unknown-list span{font-size:12px;color:#8b8c86}.unknown-list h3{font-size:20px;margin:0}.unknown-list p{font-size:15px;line-height:1.6;color:var(--soft-ink);margin:0}.final-note{border-top:1px solid var(--line);padding:30px 0 54px}.final-note p{font-size:13px;color:#777872;max-width:900px}.sticky-journey{position:fixed;z-index:100;left:18px;right:18px;bottom:16px;background:rgba(255,255,255,.91);backdrop-filter:blur(18px);border:1px solid rgba(23,24,21,.11);box-shadow:0 18px 55px rgba(23,24,21,.14);border-radius:18px;padding:11px 12px 11px 22px;display:flex;align-items:center;justify-content:space-between}.sticky-copy{display:flex;gap:8px;font-size:14px}.sticky-copy span{color:var(--soft-ink)}.sticky-journey>a{background:var(--ink);color:#fff;text-decoration:none;border-radius:13px;padding:15px 20px;font-size:14px;font-weight:600}.sticky-journey>a span{margin-left:22px}@media(max-width:1100px){.topic-panel{grid-template-columns:1fr}.topic-visual{min-height:530px}.position-grid{grid-template-columns:1fr 1fr}.position-grid>div:first-child{grid-column:1/-1}.unknowns-inner{grid-template-columns:1fr;gap:40px}}@media(max-width:760px){body{padding-bottom:82px}.wrap{width:min(100% - 32px,1380px)}.nav-shell{width:calc(100% - 28px);height:70px}.nav-shell nav,.nav-cta{display:none}.nav-toggle{display:block;margin-left:auto;border:0;background:transparent;font:600 14px var(--font)}.nav-shell.menu-open nav{display:flex;position:absolute;top:70px;left:0;right:0;background:var(--paper);padding:24px;flex-direction:column;border-bottom:1px solid var(--line)}.hero{min-height:520px}.hero-inner{padding:72px 0}.hero h1{font-size:53px}.hero-copy{font-size:17px}.hero-meta{gap:14px;flex-direction:column}.explorer-section,.unknowns{padding:78px 0}.topic-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px}.topic-tabs button{text-align:left;padding:13px 12px;font-size:10px}.topic-copy{padding:38px 24px}.topic-copy>h2{font-size:48px}.topic-lead{font-size:16px}.accordion summary{grid-template-columns:34px 1fr 20px;font-size:16px}.accordion .answer{padding-left:38px}.topic-visual{padding:22px;min-height:430px}.visual-frame{min-height:330px}.centre-symbol{width:110px;height:110px;font-size:46px}.orbit-a{width:230px;height:230px}.orbit-b{width:320px;height:320px}.position-grid{grid-template-columns:1fr}.unknown-list article{grid-template-columns:34px 1fr}.unknown-list article p{grid-column:2}.sticky-copy{display:none}.sticky-journey{left:10px;right:10px;bottom:10px;padding:8px}.sticky-journey>a{width:100%;text-align:center;padding:15px}.sticky-journey>a span{float:right;margin-left:0}}

/* v2.8 illustration upgrade */
.visual-frame.image-visual{display:block;background:#eadfcf;border-color:rgba(255,255,255,.5)}
.visual-frame.image-visual img{width:100%;height:100%;min-height:470px;display:block;object-fit:cover;object-position:center}
.visual-frame.image-visual.food-noise-visual img{object-position:center}
.visual-frame.image-visual.satiety img{object-position:center 42%}
@media(max-width:760px){.visual-frame.image-visual img{min-height:330px}.visual-frame.image-visual.food-noise-visual img{object-position:58% center}}