/* ============ ESSENTIAL BIO LABS — DESIGN SYSTEM ============ */
:root{
  --ink:#08080A; --graphite:#101013; --slate:#17181C; --carbon:#1F2126;
  --line:#2A2D33; --line-soft:#232529;
  --steel:#7A8089; --mist:#A9AFB8; --fog:#D6D9DE; --paper:#F4F5F7; --white:#FFFFFF;
  --glow:rgba(214,217,222,.10);
  --r:4px; --r-lg:10px;
  --max:1240px;
  --f-display:'Space Grotesk',ui-sans-serif,system-ui,sans-serif;
  --f-body:'Inter',ui-sans-serif,system-ui,sans-serif;
  --f-mono:'JetBrains Mono',ui-monospace,SFMono-Regular,monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ink);color:var(--fog);
  font-family:var(--f-body);font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--f-display);color:var(--white);margin:0;line-height:1.08;letter-spacing:-.025em;font-weight:600}
h1{font-size:clamp(2.6rem,6.2vw,4.6rem)}
h2{font-size:clamp(1.95rem,3.9vw,3.05rem)}
h3{font-size:clamp(1.15rem,1.7vw,1.4rem);letter-spacing:-.015em}
p{margin:0 0 1.1rem}
.wrap{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:clamp(20px,5vw,40px)}
.sec{padding:clamp(72px,10vw,132px) 0;position:relative}
.sec--tight{padding:clamp(52px,7vw,88px) 0}
.lede{font-size:clamp(1.02rem,1.35vw,1.18rem);color:var(--mist);max-width:62ch}
.muted{color:var(--steel)}
.center{text-align:center}
.mx{margin-inline:auto}
.stack>*+*{margin-top:1rem}
:focus-visible{outline:2px solid var(--white);outline-offset:3px;border-radius:2px}
::selection{background:var(--fog);color:var(--ink)}

/* ---- eyebrow / mono label ---- */
.eyebrow{
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--steel);display:inline-flex;align-items:center;gap:.6rem;margin-bottom:1.15rem;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--line);flex:none}
.eyebrow--c::after{content:"";width:26px;height:1px;background:var(--line);flex:none}

/* ---- chips ---- */
.chip{
  display:inline-flex;align-items:center;gap:.45rem;font-family:var(--f-mono);
  font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--mist);
  border:1px solid var(--line);border-radius:100px;padding:.34rem .72rem;background:rgba(255,255,255,.02);
}
.chip .dot{width:5px;height:5px;border-radius:50%;background:var(--fog);flex:none}
.chip--solid{background:var(--white);color:var(--ink);border-color:var(--white);font-weight:600}

/* ---- buttons ---- */
.btn{
  --bg:var(--white);--fg:var(--ink);--bd:var(--white);
  display:inline-flex;align-items:center;justify-content:center;gap:.55rem;
  font-family:var(--f-body);font-size:.9rem;font-weight:600;letter-spacing:.005em;
  padding:.86rem 1.5rem;border-radius:var(--r);border:1px solid var(--bd);
  background:var(--bg);color:var(--fg);cursor:pointer;position:relative;overflow:hidden;
  transition:transform .35s var(--ease),background .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease);
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn .arw{transition:transform .35s var(--ease)}
.btn:hover .arw{transform:translateX(4px)}
.btn--ghost{--bg:transparent;--fg:var(--fog);--bd:var(--line)}
.btn--ghost:hover{--bd:var(--fog);--fg:var(--white);background:rgba(255,255,255,.04)}
.btn--sm{padding:.62rem 1.05rem;font-size:.82rem}
.btn--lg{padding:1.02rem 1.9rem;font-size:.97rem}
.btn--block{display:flex;width:100%}

/* ---- hairline grid backdrop ---- */
.grid-bg::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(ellipse 90% 65% at 50% 0%,#000 5%,transparent 72%);
  mask-image:radial-gradient(ellipse 90% 65% at 50% 0%,#000 5%,transparent 72%);
  opacity:.55;
}
.rule{height:1px;background:linear-gradient(90deg,transparent,var(--line) 18%,var(--line) 82%,transparent);border:0;margin:0}

/* ============ HEADER ============ */
.hdr{
  position:sticky;top:0;z-index:90;
  background:rgba(8,8,10,.72);backdrop-filter:blur(16px) saturate(150%);-webkit-backdrop-filter:blur(16px) saturate(150%);
  border-bottom:1px solid transparent;transition:border-color .3s var(--ease),background .3s var(--ease);
}
.hdr.is-stuck{border-bottom-color:var(--line-soft);background:rgba(8,8,10,.92)}
.hdr__in{display:flex;align-items:center;gap:1.5rem;height:74px;transition:height .3s var(--ease)}
.hdr.is-stuck .hdr__in{height:64px}

/* logo */
.logo{display:inline-flex;align-items:center;gap:.68rem;flex:none}
.logo__mark{width:auto;height:26px;flex:none}
.ftr .logo__mark{height:30px}
.logo__txt{display:flex;flex-direction:column;line-height:1}
.logo__name{font-family:var(--f-display);font-weight:700;font-size:1.02rem;color:var(--white);letter-spacing:-.02em}
.logo__sub{font-family:var(--f-mono);font-size:.545rem;letter-spacing:.3em;color:var(--steel);text-transform:uppercase;margin-top:.28rem}

.nav{display:flex;align-items:center;gap:.35rem;margin-left:auto}
.nav a{
  position:relative;font-size:.895rem;color:var(--mist);padding:.5rem .78rem;border-radius:var(--r);
  transition:color .25s var(--ease);
}
.nav a:hover{color:var(--white)}
.nav a::after{
  content:"";position:absolute;left:.78rem;right:.78rem;bottom:.24rem;height:1px;background:var(--white);
  transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease);
}
.nav a:hover::after,.nav a[aria-current="page"]::after{transform:scaleX(1)}
.nav a[aria-current="page"]{color:var(--white)}
.hdr__cta{margin-left:1rem;flex:none}

/* mobile menu */
.burger{
  display:none;margin-left:auto;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r);
  background:transparent;cursor:pointer;position:relative;flex:none;
}
.burger span{position:absolute;left:11px;right:11px;height:1.5px;background:var(--fog);transition:transform .3s var(--ease),opacity .2s var(--ease)}
.burger span:nth-child(1){top:15px}
.burger span:nth-child(2){top:20px}
.burger span:nth-child(3){top:25px}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
.mnav{
  position:fixed;inset:74px 0 0;z-index:89;background:var(--ink);
  transform:translateY(-8px);opacity:0;visibility:hidden;transition:.3s var(--ease);
  padding:2rem clamp(20px,5vw,40px) 3rem;overflow-y:auto;
}
.mnav.is-open{transform:none;opacity:1;visibility:visible}
.mnav a.mnav__link{
  display:flex;align-items:center;justify-content:space-between;
  font-family:var(--f-display);font-size:1.75rem;color:var(--white);
  padding:1.05rem 0;border-bottom:1px solid var(--line-soft);
}
.mnav a.mnav__link span{font-family:var(--f-mono);font-size:.66rem;color:var(--steel)}
.mnav__foot{margin-top:2rem;display:grid;gap:.9rem}
body.no-scroll{overflow:hidden}

/* ============ FOOTER ============ */
.ftr{border-top:1px solid var(--line-soft);background:var(--graphite);padding:clamp(56px,7vw,84px) 0 0}
.ftr__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:clamp(28px,4vw,56px)}
.ftr h4{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;color:var(--steel);margin-bottom:1.1rem;font-weight:500}
.ftr ul{list-style:none;margin:0;padding:0;display:grid;gap:.62rem}
.ftr ul a,.ftr address a{font-size:.9rem;color:var(--mist);transition:color .25s var(--ease)}
.ftr ul a:hover,.ftr address a:hover{color:var(--white)}
.ftr address{font-style:normal;font-size:.9rem;color:var(--mist);display:grid;gap:.62rem}
.socials{display:flex;gap:.5rem;margin-top:1.15rem}
.socials a{
  width:38px;height:38px;display:grid;place-items:center;border:1px solid var(--line);border-radius:var(--r);
  color:var(--mist);transition:.28s var(--ease);
}
.socials a:hover{border-color:var(--fog);color:var(--white);transform:translateY(-2px)}
.ftr__note{
  margin-top:clamp(40px,5vw,60px);padding:1.4rem 0;border-top:1px solid var(--line-soft);
  font-size:.78rem;color:var(--steel);
}
.ftr__legal{
  border-top:1px solid var(--line-soft);padding:1.15rem 0;display:flex;flex-wrap:wrap;gap:1rem;
  justify-content:space-between;font-size:.78rem;color:var(--steel);
}
.ftr__legal a:hover{color:var(--fog)}

/* ============ RUO BANNER ============ */
.ruo{
  background:var(--white);color:var(--ink);font-family:var(--f-mono);
  font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;text-align:center;
  padding:.58rem 1rem;font-weight:600;position:relative;z-index:95;
}
.ruo span{opacity:.62}
@media (max-width:620px){.ruo{font-size:.58rem;letter-spacing:.1em;padding:.5rem .8rem}}

/* ============ CARDS ============ */
.card{
  position:relative;background:var(--graphite);border:1px solid var(--line-soft);border-radius:var(--r-lg);
  padding:clamp(1.4rem,2.4vw,2rem);overflow:hidden;
  transition:border-color .4s var(--ease),transform .4s var(--ease),background .4s var(--ease);
}
.card::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-lg);pointer-events:none;opacity:0;
  background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%),var(--glow),transparent 62%);
  transition:opacity .4s var(--ease);
}
.card:hover{border-color:var(--line);transform:translateY(-4px);background:var(--slate)}
.card:hover::after{opacity:1}
.card__idx{font-family:var(--f-mono);font-size:.68rem;color:var(--steel);letter-spacing:.16em;display:block;margin-bottom:1rem}
.card h3{margin-bottom:.6rem}
.card p{color:var(--mist);font-size:.94rem;margin-bottom:0}

/* ============ GRIDS ============ */
.g{display:grid;gap:clamp(14px,1.7vw,22px)}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,76px);align-items:center}

/* ============ MEDIA FRAME ============ */
.frame{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-soft);background:var(--slate)}
.frame img{width:100%;height:100%;object-fit:cover;transition:transform 1s var(--ease);filter:grayscale(1) contrast(1.06)}
.frame:hover img{transform:scale(1.045)}
.frame::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,8,10,.05),rgba(8,8,10,.5));pointer-events:none}
.frame--tag::before{
  content:attr(data-tag);position:absolute;left:14px;top:14px;z-index:2;
  font-family:var(--f-mono);font-size:.6rem;letter-spacing:.16em;text-transform:uppercase;
  background:rgba(8,8,10,.7);backdrop-filter:blur(8px);border:1px solid var(--line);
  color:var(--fog);padding:.3rem .6rem;border-radius:100px;
}
/* ---- product vial tile (light spotlight panel for cut-out product shots) ---- */
.vtile{
  position:relative;display:grid;place-items:center;overflow:hidden;
  background:
    radial-gradient(ellipse 62% 52% at 50% 34%,#FFFFFF 0%,#F1F2F4 46%,#DFE2E6 100%);
  isolation:isolate;
}
.vtile::after{
  content:"";position:absolute;left:50%;bottom:6%;transform:translateX(-50%);
  width:56%;height:7%;border-radius:50%;z-index:0;
  background:radial-gradient(ellipse at center,rgba(10,10,12,.19),transparent 70%);
  filter:blur(5px);
}
.vtile .vial{
  position:relative;z-index:1;width:auto;height:84%;max-width:72%;object-fit:contain;
  filter:drop-shadow(0 16px 26px rgba(10,10,12,.26));
  transition:transform .7s var(--ease);
}
.vtile:hover .vial{transform:translateY(-6px) scale(1.035)}
.vtile__tag{
  position:absolute;left:14px;top:14px;z-index:2;
  font-family:var(--f-mono);font-size:.6rem;letter-spacing:.16em;text-transform:uppercase;
  background:rgba(8,8,10,.9);color:var(--fog);padding:.32rem .62rem;border-radius:100px;
}
.vtile__size{
  position:absolute;right:14px;bottom:14px;z-index:2;
  font-family:var(--f-mono);font-size:.6rem;letter-spacing:.12em;text-transform:uppercase;
  background:rgba(255,255,255,.82);color:#26282C;border:1px solid rgba(10,10,12,.12);
  padding:.32rem .62rem;border-radius:100px;backdrop-filter:blur(6px);
}
.img-fallback{background:linear-gradient(135deg,#1F2126,#0E0E11 60%);position:relative}
.img-fallback::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
  background-size:24px 24px;opacity:.5;
}

/* ============ MARQUEE TRUST STRIP ============ */
.marq{border-block:1px solid var(--line-soft);background:var(--graphite);overflow:hidden;padding:1.05rem 0}
.marq__track{display:flex;gap:3.2rem;width:max-content;animation:slide 38s linear infinite}
.marq:hover .marq__track{animation-play-state:paused}
.marq__item{
  display:inline-flex;align-items:center;gap:.7rem;font-family:var(--f-mono);
  font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--steel);white-space:nowrap;
}
.marq__item svg{flex:none;color:var(--fog)}
@keyframes slide{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.marq__track{animation:none}}

/* ============ REVEAL ============ */
.rv{opacity:0;transform:translateY(18px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* ============ AGE GATE ============ */
.gate{
  position:fixed;inset:0;z-index:200;background:rgba(4,4,6,.94);backdrop-filter:blur(14px);
  display:grid;place-items:center;padding:20px;
}
.gate[hidden]{display:none}
.gate__box{
  max-width:460px;width:100%;background:var(--graphite);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:clamp(1.7rem,4vw,2.5rem);text-align:center;
}
.gate__box h2{font-size:1.5rem;margin-bottom:.85rem}
.gate__box p{font-size:.9rem;color:var(--mist)}
.gate__acts{display:grid;gap:.6rem;margin-top:1.5rem}

/* ============ UTIL ============ */
.hide{display:none!important}
@media (max-width:1000px){
  .nav,.hdr__cta{display:none}
  .burger{display:block}
  .g-4{grid-template-columns:repeat(2,1fr)}
  .ftr__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .g-3{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .split--rev>*:first-child{order:2}
}
@media (max-width:600px){
  .g-2,.g-4{grid-template-columns:1fr}
  .ftr__grid{grid-template-columns:1fr}
  h1{font-size:clamp(2.15rem,9vw,3rem)}
}