:root{--bg:#f6f8f5;--surf:#fff;--surf2:#eef3ef;--ink:#13201a;--mut:#56655d;--line:#dde5df;--acc:#e0641b;--acc2:#a8440c;--acc3:#ffb347;
--grad:linear-gradient(135deg,var(--acc),var(--acc3));--shadow:0 1px 2px rgba(16,32,24,.06),0 8px 24px rgba(16,32,24,.07);--shadow2:0 2px 4px rgba(16,32,24,.08),0 18px 40px rgba(16,32,24,.12);--r:18px;color-scheme:light}
:root[data-theme=dark]{--bg:#0c1310;--surf:#141d18;--surf2:#1a2620;--ink:#eaf3ee;--mut:#9db0a6;--line:#25342c;--shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.35);--shadow2:0 2px 4px rgba(0,0,0,.5),0 18px 40px rgba(0,0,0,.5);color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;font:17px/1.7 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--acc);text-underline-offset:3px;text-decoration-thickness:1.5px}a:hover{color:var(--acc2)}
:root[data-theme=dark] a{color:var(--acc3)}
:focus-visible{outline:3px solid var(--acc3);outline-offset:2px;border-radius:6px}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}.prose{max-width:780px;margin:0 auto}
.skip{position:absolute;left:-999px;top:8px;background:var(--acc);color:#fff;padding:8px 14px;border-radius:8px;z-index:100}.skip:focus{left:8px}
#prog{position:fixed;left:0;top:0;height:4px;width:0;background:var(--grad);z-index:60;transition:width .1s}
header.site{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--surf) 82%,transparent);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;gap:14px;padding:10px 20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.12rem;letter-spacing:-.01em;color:var(--ink)!important;text-decoration:none;white-space:nowrap}
.brand svg,.brand img{width:34px;height:34px}.brand b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
nav.main{margin-left:auto;display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}nav.main::-webkit-scrollbar{display:none}
nav.main a{display:flex;align-items:center;gap:6px;padding:8px 13px;border-radius:999px;font-size:.92rem;font-weight:600;color:var(--ink);text-decoration:none;white-space:nowrap;transition:.2s}
nav.main a:hover,nav.main a[aria-current]{background:var(--surf2);color:var(--acc)}
.tbtn{border:1px solid var(--line);background:var(--surf);color:var(--ink);width:40px;height:40px;border-radius:50%;display:grid;place-items:center;cursor:pointer;flex:none}
.tbtn:hover{border-color:var(--acc)}.ic{width:1.25em;height:1.25em;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
.moon{display:none}:root[data-theme=dark] .moon{display:block}:root[data-theme=dark] .sun{display:none}
/* HERO */
.hero{position:relative;overflow:hidden;padding:56px 0 64px;background:radial-gradient(1200px 500px at 15% -10%,color-mix(in srgb,var(--acc3) 22%,transparent),transparent 60%),radial-gradient(900px 500px at 95% 10%,color-mix(in srgb,var(--acc) 20%,transparent),transparent 60%)}
.hero .blob{position:absolute;border-radius:50%;filter:blur(60px);opacity:.5;animation:float 14s ease-in-out infinite;pointer-events:none}
.hero .b1{width:340px;height:340px;background:var(--acc3);left:-80px;top:40px}.hero .b2{width:300px;height:300px;background:var(--acc);right:-60px;bottom:-60px;animation-delay:-6s}
@keyframes float{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(30px,-24px) scale(1.08)}}
.hero .wrap{position:relative;display:grid;gap:36px;align-items:center;grid-template-columns:1.15fr .85fr}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:var(--surf);border:1px solid var(--line);font-size:.85rem;font-weight:700;color:var(--acc);box-shadow:var(--shadow)}
.hero h1{font-size:clamp(2.2rem,5.4vw,3.8rem);line-height:1.08;letter-spacing:-.03em;margin:18px 0 14px;font-weight:850}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:1.15rem;color:var(--mut);max-width:34em;margin:0 0 24px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.btn{position:relative;overflow:hidden;display:inline-flex;align-items:center;gap:8px;background:var(--grad);color:#fff!important;border:0;border-radius:14px;padding:13px 22px;font-weight:700;font-size:1rem;text-decoration:none;cursor:pointer;box-shadow:0 6px 18px color-mix(in srgb,var(--acc) 40%,transparent);transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 26px color-mix(in srgb,var(--acc) 45%,transparent)}
.btn::after{content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.35),transparent);transform:skewX(-20deg);transition:.6s}.btn:hover::after{left:140%}
.btn.ghost{background:var(--surf);color:var(--ink)!important;border:1px solid var(--line);box-shadow:none}.btn.ghost:hover{border-color:var(--acc)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}.chips span{display:inline-flex;align-items:center;gap:6px;font-size:.85rem;color:var(--mut);background:color-mix(in srgb,var(--surf) 70%,transparent);border:1px solid var(--line);padding:5px 12px;border-radius:999px}.chips .ic{color:var(--acc);width:1em;height:1em}
.art{display:grid;place-items:center}.art svg{width:100%;max-width:380px;height:auto;filter:drop-shadow(0 24px 30px rgba(0,0,0,.18))}
.spin{animation:spin 40s linear infinite;transform-origin:50% 50%}@keyframes spin{to{transform:rotate(360deg)}}
.bob{animation:float 7s ease-in-out infinite}
/* PAGE HERO */
.phero{position:relative;overflow:hidden;padding:34px 0 40px;background:radial-gradient(900px 300px at 10% 0%,color-mix(in srgb,var(--acc3) 20%,transparent),transparent 60%),radial-gradient(700px 300px at 100% 20%,color-mix(in srgb,var(--acc) 16%,transparent),transparent 60%);border-bottom:1px solid var(--line)}
.phero .wrap{position:relative}.phero h1{font-size:clamp(1.8rem,4.4vw,2.7rem);line-height:1.12;letter-spacing:-.025em;margin:12px 0 8px;font-weight:850;max-width:20em}
.crumbs{font-size:.85rem;color:var(--mut)}.crumbs a{color:var(--mut);text-decoration:none}.crumbs a:hover{color:var(--acc)}
.metaline{display:flex;gap:14px;flex-wrap:wrap;font-size:.85rem;color:var(--mut);margin-top:10px}.metaline span{display:inline-flex;align-items:center;gap:6px}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;font-weight:800;color:var(--acc)}
.badge i{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--grad);color:#fff}.badge i .ic{width:19px;height:19px}
/* LAYOUT */
.main{padding:34px 0 10px}.cols{display:grid;gap:34px;grid-template-columns:minmax(0,1fr)}
.answer{position:relative;background:var(--surf);border:1px solid var(--line);border-radius:var(--r);padding:22px 24px 20px 28px;margin:0 0 26px;box-shadow:var(--shadow2);overflow:hidden}
.answer::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--grad)}
.answer .t{display:flex;align-items:center;gap:8px;font-size:.78rem;text-transform:uppercase;letter-spacing:.09em;font-weight:800;color:var(--acc);margin-bottom:6px}
.answer p{margin:0;font-size:1.08rem}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 8px;padding:0;list-style:none}.toc a{display:inline-block;padding:6px 14px;border-radius:999px;background:var(--surf);border:1px solid var(--line);font-size:.86rem;font-weight:600;text-decoration:none;color:var(--ink)}.toc a:hover,.toc a.on{border-color:var(--acc);color:var(--acc);background:var(--surf2)}
article h2{font-size:1.65rem;line-height:1.25;letter-spacing:-.02em;margin:2.1em 0 .55em;font-weight:800;position:relative}
article h2::after{content:"";display:block;width:46px;height:4px;border-radius:4px;background:var(--grad);margin-top:10px}
article h3{font-size:1.15rem;margin:1.5em 0 .3em}
article p{margin:.8em 0}
article ul:not(.chk):not(.toc){list-style:none;padding:0}article ul:not(.chk):not(.toc)>li{position:relative;padding:5px 0 5px 32px}
article ul:not(.chk):not(.toc)>li::before{content:"";position:absolute;left:4px;top:.85em;width:14px;height:14px;border-radius:50%;background:var(--grad);-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 12l5 5L20 7' fill='none' stroke='%23000' stroke-width='4'/%3E%3C/svg%3E") center/70% no-repeat,linear-gradient(#000,#000);-webkit-mask-composite:source-out;mask-composite:exclude}
article ul:not(.chk):not(.toc)>li::before{background:var(--acc);-webkit-mask:none;mask:none;width:9px;height:9px;left:8px;top:1em}
article ol{list-style:none;counter-reset:s;padding:0}article ol>li{counter-increment:s;position:relative;padding:12px 16px 12px 62px;margin:10px 0;background:var(--surf);border:1px solid var(--line);border-radius:14px}
article ol>li::before{content:counter(s);position:absolute;left:14px;top:50%;transform:translateY(-50%);width:34px;height:34px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;display:grid;place-items:center}
.card{background:var(--surf);border:1px solid var(--line);border-radius:var(--r);padding:20px 22px;margin:14px 0;box-shadow:var(--shadow)}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin:18px 0}.grid .card{margin:0}
a.card{display:block;text-decoration:none;color:var(--ink)!important;position:relative;transition:transform .25s,box-shadow .25s,border-color .25s}
a.card:hover{transform:translateY(-5px);box-shadow:var(--shadow2);border-color:var(--acc)}
a.card .ci{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;background:var(--grad);color:#fff;margin-bottom:12px;box-shadow:0 6px 14px color-mix(in srgb,var(--acc) 35%,transparent)}
a.card b{display:block;font-size:1.08rem;margin-bottom:4px;color:var(--ink)}a.card span.d{display:block;color:var(--mut);font-size:.94rem}
a.card .go{display:inline-flex;align-items:center;gap:6px;margin-top:10px;font-weight:700;color:var(--acc);font-size:.9rem}a.card .go .ic{transition:transform .2s}a.card:hover .go .ic{transform:translateX(4px)}
.note{display:flex;gap:12px;background:color-mix(in srgb,#f5b301 14%,var(--surf));border:1px solid color-mix(in srgb,#f5b301 40%,var(--line));border-radius:14px;padding:14px 16px;font-size:.93rem;margin:26px 0}.note .ic{color:#c98a00;margin-top:2px}
.tw{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--surf);box-shadow:var(--shadow);margin:16px 0}
table{border-collapse:collapse;width:100%;font-size:.95rem}th,td{padding:11px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
th{background:var(--surf2);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--mut);position:sticky;top:0}tbody tr:nth-child(even){background:color-mix(in srgb,var(--surf2) 45%,transparent)}tbody tr:last-child td{border-bottom:0}tbody tr:hover{background:var(--surf2)}
tfoot th{font-size:1rem;text-transform:none;color:var(--ink)}
details{background:var(--surf);border:1px solid var(--line);border-radius:14px;margin:10px 0;overflow:hidden;transition:box-shadow .2s}details[open]{box-shadow:var(--shadow);border-color:var(--acc)}
summary{cursor:pointer;font-weight:700;padding:15px 52px 15px 18px;list-style:none;position:relative}summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);width:26px;height:26px;border-radius:50%;background:var(--surf2);display:grid;place-items:center;font-size:1.2rem;color:var(--acc);line-height:1;transition:.2s}details[open] summary::after{content:"−";background:var(--acc);color:#fff}
details p{margin:0;padding:0 18px 16px;color:var(--mut)}
/* CALC */
.calc label{display:block;margin:12px 0 5px;font-weight:700;font-size:.9rem}
.calc input,.calc select{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;font-size:1rem;background:var(--surf);color:var(--ink);font-family:inherit;transition:border-color .2s,box-shadow .2s}
.calc input:focus,.calc select:focus{outline:0;border-color:var(--acc);box-shadow:0 0 0 4px color-mix(in srgb,var(--acc) 20%,transparent)}
.calc .row{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}
.res{margin-top:18px;border-radius:16px;padding:20px;background:linear-gradient(135deg,color-mix(in srgb,var(--acc) 12%,var(--surf)),color-mix(in srgb,var(--acc3) 14%,var(--surf)));border:1px solid color-mix(in srgb,var(--acc) 30%,var(--line));display:none;animation:pop .5s ease}
@keyframes pop{from{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1;transform:none}}
.big{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}.big strong{font-size:clamp(2.4rem,8vw,3.6rem);line-height:1;font-weight:900;letter-spacing:-.03em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.big small{font-size:1rem;color:var(--mut)}
.kv{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));margin-top:14px}.kv div{background:var(--surf);border:1px solid var(--line);border-radius:12px;padding:10px 12px}.kv small{display:block;color:var(--mut);font-size:.78rem}.kv b{font-size:1.1rem}
.bmi{margin-top:16px}.bmi .bar{position:relative;height:12px;border-radius:99px;background:linear-gradient(90deg,#4aa3ff 0 17.3%,#38c172 17.3% 42.3%,#f5b301 42.3% 61.5%,#ef5350 61.5%)}.bmi .bar i{position:absolute;top:-5px;width:22px;height:22px;border-radius:50%;background:#fff;border:4px solid var(--ink);transform:translateX(-50%);transition:left .8s cubic-bezier(.2,.9,.3,1)}
.bmi .lbl{display:flex;justify-content:space-between;font-size:.74rem;color:var(--mut);margin-top:8px}
.btn.sm{padding:9px 16px;font-size:.9rem}
#ft{position:fixed;right:16px;bottom:16px;z-index:40;background:var(--grad);color:#fff;border-radius:16px;padding:10px 16px;font-weight:800;box-shadow:var(--shadow2);display:none}#ft small{display:block;font-weight:600;opacity:.85;font-size:.7rem}
ul.chk{list-style:none;padding:0}ul.chk li{margin:10px 0}ul.chk label{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;background:var(--surf);border:1.5px solid var(--line);border-radius:14px;cursor:pointer;transition:.2s}
ul.chk label:hover{border-color:var(--acc)}ul.chk input{width:22px;height:22px;accent-color:var(--acc);flex:none;margin-top:2px}ul.chk input:checked+span{text-decoration:line-through;color:var(--mut)}
.pbar{height:14px;border-radius:99px;background:var(--surf2);overflow:hidden;border:1px solid var(--line)}.pbar i{display:block;height:100%;width:0;background:var(--grad);transition:width .6s cubic-bezier(.2,.9,.3,1)}
.ptxt{display:flex;justify-content:space-between;font-weight:700;margin:16px 0 8px}
.conf{position:fixed;inset:0;pointer-events:none;z-index:80;overflow:hidden}.conf i{position:absolute;top:-12px;width:10px;height:16px;opacity:.95;animation:fall linear forwards}@keyframes fall{to{transform:translateY(110vh) rotate(720deg)}}
/* CTA + FOOTER */
.ctab{position:relative;overflow:hidden;border-radius:24px;padding:34px 30px;margin:48px 0 0;background:var(--grad);color:#fff;box-shadow:var(--shadow2)}
.ctab::before{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;background:rgba(255,255,255,.16)}
.ctab h2{margin:0 0 8px;color:#fff;font-size:1.6rem}.ctab h2::after{display:none}.ctab p{margin:0 0 18px;max-width:34em;opacity:.95}.ctab .btn{background:#fff;color:var(--acc2)!important;box-shadow:none}
h2.rel{margin-top:2.2em}
footer.site{margin-top:64px;background:#0f1a14;color:#bccbc2;padding:44px 0 30px;font-size:.93rem}footer.site a{color:#e6f2eb;text-decoration:none}footer.site a:hover{color:var(--acc3);text-decoration:underline}
footer.site .fg{display:grid;gap:28px;grid-template-columns:1.3fr 1fr 1fr}footer.site h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;color:#7e9488;margin:0 0 12px}
footer.site ul{list-style:none;padding:0;margin:0}footer.site li{margin:7px 0}.fine{margin-top:30px;padding-top:18px;border-top:1px solid #22332a;font-size:.82rem;color:#7e9488}
.totop{position:fixed;left:16px;bottom:16px;z-index:40;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--surf);color:var(--ink);display:none;place-items:center;cursor:pointer;box-shadow:var(--shadow)}
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}.js .reveal.in{opacity:1;transform:none}
.js .reveal.d1{transition-delay:.08s}.js .reveal.d2{transition-delay:.16s}.js .reveal.d3{transition-delay:.24s}
@media (max-width:820px){.hero .wrap{grid-template-columns:1fr}.art{order:-1}.art svg{max-width:240px}footer.site .fg{grid-template-columns:1fr}.hero{padding-top:34px}nav.main a span.t{display:none}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.js .reveal{opacity:1;transform:none}html{scroll-behavior:auto}}
@media print{header.site,footer.site,.noprint,.hero .blob,.totop,#ft,#prog,.ctab{display:none!important}body{background:#fff;color:#000}.phero{background:none}a{color:#000}.card,.tw{box-shadow:none}}

/* 2026-10-07 editorial / GEO additions */
.prose-wide{max-width:920px;margin:0 auto}.editorial-figure{margin:28px 0 34px}.editorial-figure img{display:block;width:100%;height:auto;border-radius:20px;border:1px solid var(--line);background:var(--surf);box-shadow:var(--shadow)}.editorial-figure figcaption{margin-top:8px;color:var(--mut);font-size:.86rem}.authorbox{display:flex;gap:16px;align-items:flex-start;margin:36px 0 0;padding:20px;border:1px solid var(--line);border-radius:18px;background:var(--surf)}.authorbox .avatar{width:48px;height:48px;flex:0 0 48px;border-radius:50%;display:grid;place-items:center;background:var(--grad);color:#fff;font-weight:900}.authorbox p{margin:.25em 0 0;color:var(--mut);font-size:.93rem}.keyfacts{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:18px 0}.keyfacts>div{padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--surf);text-align:center}.keyfacts strong{display:block;font-size:1.15rem;color:var(--acc2)}.keyfacts span{display:block;color:var(--mut);font-size:.86rem}.sources a{font-weight:650}.source-note,.privacy-inline{font-size:.86rem;color:var(--mut)}code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--surf2);border:1px solid var(--line);padding:.1em .35em;border-radius:6px}.home .grid .ci{font-weight:900;font-size:1.15rem}article strong{font-weight:750}.metaline a{color:inherit}.metaline a:hover{color:var(--acc)}
@media(max-width:640px){.keyfacts{grid-template-columns:1fr}.editorial-figure{margin-left:-6px;margin-right:-6px}.authorbox{display:block}.authorbox .avatar{margin-bottom:10px}.wrap{padding-left:16px;padding-right:16px}body{font-size:16px}}