:root{
  --blue:#1565C0; --blue-d:#0D3B7A; --blue-l:#42A5F5; --ice:#EAF2FB;
  --ink:#1C1C1E; --white:#fff; --grey:#8E8E93; --sep:#E5E5EA; --bg:#F2F2F7;
  --amber:#F9A825; --under:#29B6F6; --normal:#2E7D32; --over:#F9A825; --obese:#D32F2F;
  --maxw:1140px; --shadow:0 10px 30px rgba(17,23,34,.07); --shadow-sm:0 2px 10px rgba(17,23,34,.05);
  --r:14px; --r-lg:20px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Inter","Segoe UI",Roboto,sans-serif;
  color:var(--ink);background:var(--white);line-height:1.55;overflow-x:hidden;letter-spacing:-.01em}
.ms{font-family:'Material Symbols Rounded';font-weight:normal;font-style:normal;line-height:1;font-variation-settings:'FILL' 0;display:inline-block}
.ms.fill{font-variation-settings:'FILL' 1}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* scroll progress */
.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--blue);z-index:70;border-radius:0 3px 3px 0}

/* buttons — flat iOS */
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--blue);color:#fff;font-weight:600;font-size:15.5px;
  padding:14px 26px;border:none;border-radius:var(--r);cursor:pointer;transition:transform .16s,background .2s,filter .2s}
.btn:hover{filter:brightness(1.06)}
.btn:active{transform:scale(.97)}
.btn.ghost{background:rgba(21,101,192,.1);color:var(--blue)}
.btn.ghost:hover{background:rgba(21,101,192,.16);filter:none}

/* ---------- scroll reveals ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s cubic-bezier(.22,.61,.36,1),transform .7s cubic-bezier(.22,.61,.36,1)}
.reveal.reveal-left{transform:translateX(-44px)}
.reveal.reveal-right{transform:translateX(44px)}
.reveal.reveal-scale{transform:scale(.9)}
.reveal.in{opacity:1;transform:none;transition-delay:var(--d,0s)}
/* stagger inside grids */
.feat-grid .feat:nth-child(2),.know-grid .kcard:nth-child(2),.cat:nth-child(2){--d:.06s}
.feat-grid .feat:nth-child(3),.know-grid .kcard:nth-child(3),.cat:nth-child(3){--d:.12s}
.feat-grid .feat:nth-child(4),.know-grid .kcard:nth-child(4),.cat:nth-child(4){--d:.18s}
.feat-grid .feat:nth-child(5),.know-grid .kcard:nth-child(5),.cat:nth-child(5){--d:.24s}
.feat-grid .feat:nth-child(6),.know-grid .kcard:nth-child(6),.cat:nth-child(6){--d:.3s}
.stat:nth-child(2){--d:.06s}.stat:nth-child(3){--d:.12s}.stat:nth-child(4){--d:.18s}.stat:nth-child(5){--d:.24s}

/* ---------- NAV (iOS translucent) ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:60;transition:background .3s,box-shadow .3s,padding .3s,border-color .3s;
  padding:15px 0;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(255,255,255,.8);-webkit-backdrop-filter:saturate(180%) blur(20px);backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--sep);padding:9px 0}
.nav-inner{display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:17px;color:#fff;transition:color .3s}
.brand .ms{background:#fff;color:var(--blue);border-radius:9px;padding:5px;font-size:21px}
.nav.scrolled .brand{color:var(--ink)}
.links{display:flex;gap:24px;margin-left:auto}
.links a{font-weight:500;font-size:14.5px;color:rgba(255,255,255,.92);transition:color .2s,opacity .2s}
.links a:hover{opacity:.7}
.nav.scrolled .links a{color:var(--ink)}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:16px}
/* iOS segmented control */
.langs{display:inline-flex;background:rgba(255,255,255,.2);border-radius:9px;padding:2px}
.nav.scrolled .langs{background:rgba(120,120,128,.12)}
.langs button{border:none;background:transparent;color:#fff;font-family:inherit;font-weight:600;font-size:12.5px;
  padding:5px 11px;border-radius:7px;cursor:pointer;transition:all .2s}
.nav.scrolled .langs button{color:var(--grey)}
.langs button.on{background:#fff;color:var(--blue);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.burger{display:none;background:none;border:none;color:#fff;cursor:pointer}
.nav.scrolled .burger{color:var(--ink)}
.burger .ms{font-size:28px}

/* ---------- HERO (flat) ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;color:#fff;overflow:hidden;background:var(--blue-d)}
.hero-bg{position:absolute;inset:0;overflow:hidden}
.blob{position:absolute;border-radius:50%;filter:none}
.b1{width:520px;height:520px;background:rgba(255,255,255,.05);top:-160px;left:-140px}
.b2{width:420px;height:420px;background:rgba(255,255,255,.045);bottom:-160px;right:4%}
.b3{width:240px;height:240px;background:rgba(66,165,245,.14);top:24%;right:24%}
.hero-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;padding-top:90px;padding-bottom:60px}
.kicker{display:inline-block;background:rgba(255,255,255,.14);padding:7px 14px;border-radius:20px;font-size:12px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;margin-bottom:20px}
.hero-text h1{font-size:clamp(36px,5.4vw,62px);font-weight:800;line-height:1.03;letter-spacing:-1.5px}
.hero-text p{font-size:clamp(15px,1.8vw,19px);color:rgba(255,255,255,.8);margin:18px 0 30px;max-width:520px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-cta .btn.ghost{background:rgba(255,255,255,.14);color:#fff}
.hero-cta .btn.ghost:hover{background:rgba(255,255,255,.22)}
.hero-text .reveal:nth-child(1){--d:.05s}.hero-text .reveal:nth-child(2){--d:.13s}
.hero-text .reveal:nth-child(3){--d:.21s}.hero-text .reveal:nth-child(4){--d:.29s}

/* phone mock (flat) */
.hero-visual{display:flex;justify-content:center;will-change:transform}
.phone{width:288px;background:#0A1B33;border-radius:40px;padding:12px;box-shadow:0 30px 60px rgba(0,0,0,.35)}
.p-head{background:var(--blue);border-radius:30px 30px 12px 12px;color:#fff;padding:20px 18px 24px;display:flex;justify-content:space-between;align-items:center;font-size:15px;font-weight:600}
.p-head span{background:rgba(255,255,255,.22);border-radius:8px;padding:3px 9px;font-size:11px;font-weight:700}
.p-bmi{background:#fff;border-radius:14px;margin:-14px 12px 0;padding:12px 14px;display:flex;align-items:center;gap:12px}
.p-bmi .ms{background:var(--ice);color:var(--blue);border-radius:10px;padding:8px;font-size:22px}
.p-bmi b{display:block;font-size:13px;color:var(--ink)}
.p-bmi i{font-style:normal;font-size:12px;color:var(--grey)}
.p-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:14px 12px}
.p-grid .ms{background:#fff;color:var(--blue);border-radius:14px;padding:22px;font-size:26px;text-align:center}
.p-grid .ms:nth-child(1){background:var(--ice)}
.p-nav{background:#fff;border-radius:22px;margin:6px 14px 4px;padding:12px 20px;display:flex;justify-content:space-between}
.p-nav .ms{color:#C7CDD6;font-size:24px}
.p-nav .ms.fill{color:var(--blue)}
.scroll-hint{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);color:rgba(255,255,255,.6);animation:bounce 1.8s infinite}
.scroll-hint .ms{font-size:32px}
@keyframes bounce{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}

/* ---------- STATS (flat) ---------- */
.stats{background:var(--blue);color:#fff;padding:44px 0}
.stat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;text-align:center}
.stat b{display:block;font-size:clamp(30px,4vw,46px);font-weight:800;color:#fff;letter-spacing:-1px}
.stat span{font-size:13px;color:rgba(255,255,255,.78);font-weight:500}

/* ---------- SECTIONS ---------- */
.section{padding:86px 0}
.section.alt{background:var(--bg)}
.head{text-align:center;max-width:640px;margin:0 auto 44px}
.head h2,.about-text h2,.bmi-left h2{font-size:clamp(27px,3.4vw,38px);font-weight:800;letter-spacing:-1px}
.head p{color:var(--grey);margin-top:10px;font-size:16px}
.eyebrow{display:inline-block;color:var(--blue);font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:.6px;margin-bottom:8px}

/* about */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}
.about-media img{border-radius:var(--r-lg);box-shadow:var(--shadow);width:100%;height:420px;object-fit:cover}
.about-text p,.about-text .p{color:var(--grey);margin-bottom:13px;opacity:0;transform:translateY(18px);transition:.6s}
.about-text .p.in{opacity:1;transform:none}

/* features — flat cards */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feat{background:#fff;border:1px solid var(--sep);border-radius:var(--r-lg);padding:26px;transition:transform .25s,box-shadow .25s}
.feat:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.feat .fi{width:56px;height:56px;border-radius:15px;background:var(--ice);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feat .fi .ms{color:var(--blue);font-size:29px}
.feat h3{font-size:18px;font-weight:700;letter-spacing:-.3px}
.feat p{color:var(--grey);font-size:14px;margin-top:7px}

/* BMI */
.bmi-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center}
.bmi-left p{color:var(--grey);margin:8px 0 22px}
.bmi-inputs{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:18px}
.bmi-inputs label{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600;color:var(--grey)}
.bmi-inputs input{height:50px;border:1px solid var(--sep);border-radius:12px;padding:0 15px;font-family:inherit;font-size:16px;color:var(--ink);outline:none;background:#fff;transition:border .2s}
.bmi-inputs input:focus{border-color:var(--blue)}
.scale{margin-top:24px;display:grid;gap:8px}
.scale-row{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:12px;border:1px solid var(--sep);background:#fff;transition:.3s}
.scale-row .dot{width:11px;height:11px;border-radius:50%}
.scale-row .l{flex:1;font-weight:600;font-size:14px}
.scale-row .r{color:var(--grey);font-size:14px}
.bmi-right{display:flex;justify-content:center}
.gauge{position:relative;width:300px;height:300px}
.gauge svg{width:100%;height:100%}
#gArc{transition:stroke-dasharray 1s cubic-bezier(.22,.61,.36,1)}
.g-val{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.g-val small{color:var(--grey);font-size:14px}
.g-val b{font-size:62px;font-weight:800;line-height:1;color:var(--normal);letter-spacing:-2px}
.g-val em{font-style:normal;font-weight:600;margin-top:6px;padding:5px 14px;border-radius:20px;font-size:14px}

/* categories — iOS segmented + flat tiles */
.cat-tabs{display:flex;justify-content:center;margin-bottom:26px}
.cat-tabs{gap:0}
.cat-tabs{}
#catTabs{display:inline-flex;background:rgba(120,120,128,.12);border-radius:12px;padding:4px;margin:0 auto 26px;justify-content:center}
.cat-tabs button{border:none;background:transparent;color:var(--grey);font-family:inherit;font-weight:600;font-size:14px;padding:9px 26px;border-radius:9px;cursor:pointer;transition:.2s}
.cat-tabs button.on{background:#fff;color:var(--blue);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.cat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.cat{background:#fff;border:1px solid var(--sep);border-radius:var(--r);padding:18px 14px;text-align:center;transition:transform .2s,box-shadow .2s}
.cat:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.cat b{display:block;font-size:25px;font-weight:800;color:var(--blue);letter-spacing:-1px}
.cat span{font-size:13px;color:var(--grey)}

/* training accordion — iOS grouped list */
.acc{max-width:820px;margin:0 auto;display:grid;gap:12px}
.wk{background:#fff;border:1px solid var(--sep);border-radius:16px;overflow:hidden}
.wk-head{display:flex;align-items:center;gap:15px;padding:16px 20px;cursor:pointer;user-select:none}
.wk-num{width:44px;height:44px;border-radius:12px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px}
.wk-head h4{font-size:16px;font-weight:700}
.wk-head small{color:var(--grey);font-weight:500}
.wk-head .ms{margin-left:auto;color:var(--grey);transition:transform .3s}
.wk.open .wk-head .ms{transform:rotate(180deg)}
.wk-body{max-height:0;overflow:hidden;transition:max-height .4s ease}
.wk-inner{padding:0 20px 16px}
.sess{background:var(--bg);border-radius:14px;padding:16px;margin-top:12px}
.sess-h{display:flex;align-items:center;gap:8px;color:var(--blue);font-weight:700;margin-bottom:10px;font-size:14px}
.exx{padding:10px 0;border-top:1px solid var(--sep)}
.exx:first-of-type{border-top:none}
.exx b{font-weight:600;font-size:14.5px}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0 4px}
.chip{background:var(--ice);color:var(--blue-d);font-size:12px;font-weight:600;padding:5px 10px;border-radius:16px}
.exx i{font-style:normal;color:var(--grey);font-size:12.5px}

/* knowledge */
.know-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.kcard{background:#fff;border:1px solid var(--sep);border-radius:var(--r-lg);overflow:hidden;transition:transform .25s,box-shadow .25s}
.kcard:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.kcard .kimg{height:196px;overflow:hidden;cursor:zoom-in;background:var(--ice)}
.kcard .kimg img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.kcard:hover .kimg img{transform:scale(1.06)}
.kcard .kbody{padding:18px 20px}
.kcard h3{font-size:17px;font-weight:700;display:flex;align-items:center;gap:8px;letter-spacing:-.3px}
.kcard h3 .ms{color:var(--blue)}
.kcard p{color:var(--grey);font-size:13.5px;margin-top:6px}

/* footer */
.footer{background:#0A1B33;color:#fff;padding:54px 0 40px;text-align:center}
.foot-brand{display:inline-flex;align-items:center;gap:10px;font-size:21px;font-weight:700}
.foot-brand .ms{background:var(--blue);border-radius:10px;padding:6px}
.footer p{color:rgba(255,255,255,.7);margin:13px 0}
.foot-copy{color:rgba(255,255,255,.4);font-size:13px;margin-top:16px}

/* lightbox */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.9);z-index:100;display:none;align-items:center;justify-content:center}
.lightbox.on{display:flex;animation:fade .25s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.lightbox img{max-width:92%;max-height:88%;border-radius:12px}
#lbClose{position:absolute;top:18px;right:18px;background:rgba(255,255,255,.16);border:none;color:#fff;width:44px;height:44px;border-radius:50%;cursor:pointer;font-size:24px;display:flex;align-items:center;justify-content:center}

/* ---------- RESPONSIVE ---------- */
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;text-align:center;padding-top:108px}
  .hero-text p{margin-left:auto;margin-right:auto}.hero-cta{justify-content:center}
  .hero-visual{margin-top:28px}
  .about-grid,.bmi-grid{grid-template-columns:1fr;gap:28px}
  .about-media img{height:290px}
  .feat-grid,.know-grid{grid-template-columns:1fr 1fr}
  .stat-grid{grid-template-columns:repeat(3,1fr);gap:22px}
  .cat-grid{grid-template-columns:repeat(3,1fr)}
  .links{position:fixed;top:60px;right:14px;left:14px;flex-direction:column;gap:2px;background:rgba(255,255,255,.92);
    -webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--sep);border-radius:16px;padding:10px;
    box-shadow:var(--shadow);transform:translateY(-12px);opacity:0;pointer-events:none;transition:.25s}
  .nav.open .links{transform:none;opacity:1;pointer-events:auto}
  .links a{color:var(--ink);padding:11px}
  .burger{display:block}
}
@media(max-width:560px){
  .feat-grid,.know-grid{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr}
  .cat-grid{grid-template-columns:1fr 1fr}
  .bmi-inputs{grid-template-columns:1fr}
  .gauge{width:240px;height:240px}.g-val b{font-size:50px}
}