:root{
  --bg:#ffffff;
  --soft:#f6f6f6;
  --soft2:#efefef;
  --text:#090909;
  --muted:#666;
  --line:#dedede;
  --radius:16px;
  --radius-sm:11px;
  --shadow:0 14px 36px rgba(0,0,0,.08);
  --container:min(1120px, calc(100% - 34px));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.container{width:var(--container);margin-inline:auto}
.site-header{
  position:sticky;top:0;z-index:40;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(0,0,0,.05)
}
.nav-wrap{
  min-height:58px;
  display:grid;grid-template-columns:1fr auto 1fr;
  align-items:center;gap:18px;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:750;letter-spacing:-.02em}
.brand-mark{
  width:30px;height:30px;border-radius:8px;background:#050505;color:#fff;
  display:grid;place-items:center;font-size:14px;font-weight:800
}
.desktop-nav{display:flex;align-items:center;gap:28px;color:#444;font-size:14px}
.desktop-nav a,.footer-links a{transition:color .18s ease}
.desktop-nav a:hover,.footer-links a:hover{color:#000}
.nav-cta{justify-self:end}
.research-bar{background:#050505;color:#fff;font-size:11px}
.research-bar-inner{min-height:28px;display:flex;align-items:center;justify-content:center;gap:8px;text-align:center}
.btn{
  border:1px solid transparent;border-radius:9px;
  min-height:40px;padding:0 17px;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:700;font-size:13px;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease
}
.btn:hover{transform:translateY(-1px)}
.btn-dark{background:#050505;color:#fff}
.btn-dark:hover{box-shadow:0 8px 18px rgba(0,0,0,.15)}
.btn-light{background:#fff;border-color:#d5d5d5;color:#161616}
.btn-light:hover{border-color:#a8a8a8}
.btn-white{background:#fff;color:#050505}
.btn-full{width:100%}
.mobile-menu-btn,.mobile-nav{display:none}
.icon-btn{border:0;background:transparent}
.hero{
  min-height:500px;
  padding:66px 0 56px;
  display:grid;grid-template-columns:1fr 1fr;
  align-items:center;gap:64px;
}
.eyebrow{
  display:inline-flex;align-items:center;
  border:1px solid #d5d5d5;border-radius:999px;
  padding:6px 10px;font-size:11px;font-weight:700;letter-spacing:.01em;
  color:#343434;background:#fff
}
.hero h1,.section-head h2,.quality-grid h2,.faq-section h2,.contact-card h2,.drawer-head h2,.modal-copy h2{
  margin:18px 0 0;letter-spacing:-.045em;line-height:.98
}
.hero h1{font-size:clamp(44px,5.7vw,70px)}
.hero-copy>p{
  color:#5f5f5f;max-width:560px;font-size:18px;line-height:1.55;margin:22px 0 0
}
.hero-actions{display:flex;gap:10px;margin-top:24px}
.hero-points{display:flex;flex-wrap:wrap;gap:20px;margin-top:22px;color:#555;font-size:13px}
.hero-card{
  border-radius:22px;background:linear-gradient(145deg,#f4f4f4,#ececec);
  padding:20px;box-shadow:var(--shadow)
}
.vial-stage{
  min-height:330px;border-radius:17px;background:#020202;
  display:grid;place-items:center;overflow:hidden;position:relative
}
.vial-stage:after{
  content:"";position:absolute;left:10%;right:10%;bottom:-30px;height:120px;
  background:radial-gradient(ellipse,rgba(255,255,255,.22),transparent 70%);
  filter:blur(12px)
}
.vials{display:flex;align-items:flex-end;gap:15px;transform:translateY(14px)}
.vial{
  width:62px;height:190px;border:2px solid #222;border-radius:8px 8px 14px 14px;
  background:linear-gradient(90deg,#1c1c1c,#050505 30%,#111 70%,#202020);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:#ddd;position:relative;box-shadow:0 12px 22px rgba(255,255,255,.05)
}
.vial:before{
  content:"";position:absolute;left:8px;right:8px;bottom:8px;height:60px;
  background:linear-gradient(#f4f4f4,#d0d0d0);border-radius:0 0 8px 8px
}
.vial span{
  position:absolute;top:-24px;width:70px;height:30px;border-radius:5px 5px 3px 3px;
  background:linear-gradient(#d9d9d9,#8f8f8f 44%,#bdbdbd 45%,#888)
}
.vial b,.vial small{z-index:1;background:#080808;padding:2px 4px}
.vial b{font-size:10px}.vial small{font-size:7px;margin-top:4px}
.trust-strip{background:#f8f8f8;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding:24px 0}
.trust-item{display:flex;align-items:center;justify-content:center;gap:13px;text-align:left}
.trust-icon{
  width:38px;height:38px;border:1px solid #d8d8d8;border-radius:50%;
  display:grid;place-items:center;background:#fff;font-size:15px;flex:0 0 auto
}
.trust-item h3{margin:0;font-size:14px}
.trust-item p{margin:5px 0 0;color:#6b6b6b;font-size:12px;line-height:1.45}
.products-section{padding:60px 0 64px}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:24px}
.section-head h2,.quality-grid h2,.faq-section h2,.contact-card h2{font-size:clamp(32px,4vw,48px)}
.section-head p{margin:12px 0 0;color:#696969;max-width:620px}
.catalog-tools{display:flex;gap:8px;align-items:center}
.search-box{
  width:220px;height:40px;border:1px solid #d8d8d8;border-radius:10px;
  display:flex;align-items:center;gap:8px;padding:0 11px;background:#fff
}
.search-box input{border:0;outline:0;width:100%;background:transparent}
.sort-select{
  height:40px;border:1px solid #d8d8d8;border-radius:10px;background:#fff;padding:0 10px;color:#333
}
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.product-card{
  border:1px solid #e1e1e1;border-radius:14px;background:#fff;overflow:hidden;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease
}
.product-card:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(0,0,0,.07);border-color:#c9c9c9}
.product-image{
  aspect-ratio:1/.85;background:linear-gradient(150deg,#fafafa,#f0f0f0);
  display:grid;place-items:center;border-bottom:1px solid #e7e7e7;position:relative
}
.product-image:after{
  content:"RESEARCH ONLY";position:absolute;left:10px;top:10px;
  font-size:9px;font-weight:800;letter-spacing:.08em;color:#666
}
.product-vial{
  width:54px;height:130px;border:2px solid #222;border-radius:7px 7px 12px 12px;
  background:linear-gradient(90deg,#1c1c1c,#050505 30%,#111 70%,#202020);
  display:flex;flex-direction:column;align-items:center;justify-content:center;color:#ddd;position:relative
}
.product-vial:before{
  content:"";position:absolute;left:7px;right:7px;bottom:6px;height:42px;
  background:linear-gradient(#f8f8f8,#d5d5d5);border-radius:0 0 7px 7px
}
.product-vial span{position:absolute;top:-18px;width:60px;height:24px;border-radius:4px;background:linear-gradient(#ddd,#929292)}
.product-vial b,.product-vial small{z-index:1;background:#070707;padding:2px 3px}
.product-vial b{font-size:8px}.product-vial small{font-size:6px;margin-top:3px}
.product-vial.xl{transform:scale(1.35)}
.product-body{padding:14px}
.product-top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.product-body h3{margin:0;font-size:15px;letter-spacing:-.02em}
.product-price{font-weight:800;font-size:14px}
.product-desc{margin:7px 0 12px;color:#707070;font-size:12px;line-height:1.45;min-height:34px}
.product-actions{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.product-actions .btn{padding:0 10px;min-height:36px;font-size:12px}
.quality-section{background:#0b0b0b;color:#fff;padding:54px 0}
.quality-grid{display:grid;grid-template-columns:.9fr 1.4fr;gap:52px;align-items:start}
.quality-grid .eyebrow,.eyebrow.light{border-color:#3f3f3f;background:#161616;color:#ddd}
.quality-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.quality-cards article{background:#151515;border:1px solid #272727;border-radius:14px;padding:18px}
.quality-cards strong{color:#8f8f8f;font-size:11px}
.quality-cards h3{margin:22px 0 7px;font-size:15px}
.quality-cards p{margin:0;color:#aaa;font-size:12px;line-height:1.55}
.faq-section{padding:58px 0}
.section-head.narrow{margin-bottom:18px}
.faq-list{border-top:1px solid #ddd}
.faq-item{border-bottom:1px solid #ddd}
.faq-question{
  width:100%;background:none;border:0;padding:18px 0;display:flex;justify-content:space-between;
  align-items:center;text-align:left;font-weight:700
}
.faq-question b{font-size:20px;font-weight:400;transition:transform .2s ease}
.faq-question[aria-expanded="true"] b{transform:rotate(45deg)}
.faq-answer{display:grid;grid-template-rows:0fr;transition:grid-template-rows .2s ease}
.faq-answer>p{overflow:hidden;margin:0;color:#666;max-width:760px;line-height:1.6;font-size:14px}
.faq-item.open .faq-answer{grid-template-rows:1fr}
.faq-item.open .faq-answer>p{padding:0 0 18px}
.contact-section{background:#f4f4f4;padding:36px 0 42px}
.contact-card{
  background:#070707;color:#fff;border-radius:18px;padding:30px;
  display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center
}
.contact-card p{color:#b7b7b7;max-width:520px;line-height:1.55}
.contact-form{display:grid;gap:8px}
.contact-form input,.contact-form textarea{
  width:100%;border:1px solid #303030;border-radius:10px;background:#141414;color:#fff;padding:12px;outline:none
}
.contact-form input:focus,.contact-form textarea:focus{border-color:#888}
.footer{border-top:1px solid #e2e2e2;padding:26px 0}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:26px;align-items:start}
.footer-brand{margin-bottom:10px}
.footer p,.footer-note{color:#747474;font-size:12px}
.footer-links{display:flex;gap:16px;flex-wrap:wrap;font-size:13px}
.footer-note{display:grid;gap:6px;justify-content:end;text-align:right}
.cart-fab{
  position:fixed;right:18px;bottom:18px;z-index:38;border:0;background:#050505;color:#fff;border-radius:999px;
  min-height:46px;padding:0 10px 0 16px;display:flex;align-items:center;gap:10px;font-weight:700;
  box-shadow:0 12px 30px rgba(0,0,0,.22)
}
.cart-fab b{min-width:28px;height:28px;border-radius:999px;background:#fff;color:#050505;display:grid;place-items:center;font-size:12px}
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.35);backdrop-filter:blur(3px);z-index:60;opacity:0;pointer-events:none;transition:opacity .2s ease}
.overlay.show{opacity:1;pointer-events:auto}
.cart-drawer{
  position:fixed;top:0;right:0;height:100%;width:min(430px,92vw);background:#fff;z-index:70;
  transform:translateX(100%);transition:transform .24s ease;display:grid;grid-template-rows:auto 1fr auto;
  box-shadow:-20px 0 40px rgba(0,0,0,.12)
}
.cart-drawer.open{transform:translateX(0)}
.drawer-head{padding:20px;border-bottom:1px solid #e5e5e5;display:flex;justify-content:space-between;align-items:start}
.drawer-head h2{font-size:30px;margin-top:8px}
.close-btn{font-size:28px;line-height:1;width:38px;height:38px;border-radius:50%}
.close-btn:hover{background:#f2f2f2}
.cart-items{padding:14px 20px;overflow:auto}
.empty-cart{color:#777;padding:24px 0;text-align:center}
.cart-row{display:grid;grid-template-columns:54px 1fr auto;gap:12px;padding:12px 0;border-bottom:1px solid #eee;align-items:center}
.cart-thumb{width:54px;height:54px;border-radius:10px;background:#f1f1f1;display:grid;place-items:center;font-size:10px;font-weight:800}
.cart-row h4{margin:0 0 5px;font-size:13px}.cart-row small{color:#777}
.qty-controls{display:flex;align-items:center;gap:7px;margin-top:7px}
.qty-controls button{width:24px;height:24px;border-radius:7px;border:1px solid #ddd;background:#fff}
.remove-btn{border:0;background:none;color:#8a8a8a;font-size:12px;padding:0}
.cart-footer{border-top:1px solid #e5e5e5;padding:18px 20px;display:grid;gap:12px}
.subtotal{display:flex;justify-content:space-between;align-items:center}
.cart-footer small{color:#777;line-height:1.45}
.modal{
  position:fixed;inset:0;z-index:80;display:grid;place-items:center;padding:18px;
  opacity:0;pointer-events:none;transition:opacity .2s ease
}
.modal.open{opacity:1;pointer-events:auto}
.modal-card{
  width:min(780px,100%);background:#fff;border-radius:18px;box-shadow:0 24px 70px rgba(0,0,0,.22);
  display:grid;grid-template-columns:.85fr 1.15fr;overflow:hidden;position:relative
}
.modal-image{min-height:430px;background:#f1f1f1;display:grid;place-items:center}
.modal-copy{padding:34px}
.modal-copy h2{font-size:40px;margin-top:12px}
.modal-copy>p{color:#666;line-height:1.6}
.modal-meta{display:flex;gap:7px;flex-wrap:wrap;margin:20px 0}
.modal-meta span{background:#f3f3f3;border:1px solid #e1e1e1;border-radius:999px;padding:6px 9px;font-size:11px}
.modal-buy{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-top:24px}
.modal-buy strong{font-size:28px}
.modal-disclaimer{font-size:11px!important;color:#8a8a8a!important}
.modal-close{position:absolute;right:12px;top:12px;z-index:2;background:rgba(255,255,255,.9)}
.toast{
  position:fixed;left:50%;bottom:22px;transform:translate(-50%,20px);z-index:100;
  background:#050505;color:#fff;padding:11px 15px;border-radius:999px;font-size:12px;
  opacity:0;pointer-events:none;transition:all .2s ease
}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media (max-width:900px){
  .desktop-nav,.nav-cta{display:none}
  .nav-wrap{grid-template-columns:1fr auto;min-height:56px}
  .mobile-menu-btn{display:flex;width:38px;height:38px;flex-direction:column;justify-content:center;gap:4px;align-items:center}
  .mobile-menu-btn span{width:18px;height:2px;background:#111;border-radius:2px}
  .mobile-nav{display:grid;grid-template-rows:0fr;overflow:hidden;transition:grid-template-rows .2s ease,padding .2s ease;gap:0}
  .mobile-nav>*{overflow:hidden}
  .mobile-nav.open{grid-template-rows:repeat(5,auto);padding-bottom:12px;gap:4px}
  .mobile-nav a{padding:10px 0;font-size:14px}
  .hero{grid-template-columns:1fr;gap:30px;min-height:0;padding:44px 0 40px}
  .hero-copy>p{font-size:16px}
  .hero-card{max-width:640px;width:100%;justify-self:center}
  .trust-grid{grid-template-columns:1fr;gap:10px;padding:18px 0}
  .trust-item{justify-content:flex-start}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .section-head{align-items:flex-start;flex-direction:column}
  .catalog-tools{width:100%}
  .search-box{flex:1;width:auto}
  .quality-grid{grid-template-columns:1fr;gap:28px}
  .contact-card{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-note{grid-column:1/-1;justify-content:start;text-align:left}
}
@media (max-width:620px){
  :root{--container:min(100% - 24px,1120px)}
  .research-bar{font-size:9.5px}
  .hero{padding:32px 0 28px;gap:22px}
  .hero h1{font-size:43px}
  .hero-actions{display:grid;grid-template-columns:1fr 1fr}
  .hero-actions .btn{width:100%}
  .hero-points{gap:10px 16px;margin-top:16px;font-size:12px}
  .hero-card{padding:12px;border-radius:16px}
  .vial-stage{min-height:245px}
  .vials{gap:8px;transform:translateY(10px) scale(.8)}
  .products-section,.faq-section{padding:40px 0}
  .product-grid{gap:9px}
  .product-body{padding:11px}
  .product-image{aspect-ratio:1/1}
  .product-actions{grid-template-columns:1fr}
  .product-desc{min-height:0}
  .catalog-tools{display:grid;grid-template-columns:1fr}
  .sort-select{width:100%}
  .quality-cards{grid-template-columns:1fr}
  .quality-section{padding:40px 0}
  .contact-section{padding:26px 0}
  .contact-card{padding:20px;gap:20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-note{grid-column:auto}
  .footer-links{gap:12px}
  .modal-card{grid-template-columns:1fr;max-height:92vh;overflow:auto}
  .modal-image{min-height:235px}
  .modal-copy{padding:22px}
  .modal-copy h2{font-size:34px}
}

/* Catalog V2 */
.singles-section{background:#f7f7f7;border-top:1px solid #e4e4e4;border-bottom:1px solid #e4e4e4;margin:0;max-width:none;width:100%;padding:54px 0 60px}
.modern-vial{width:76px;height:156px;position:relative;filter:drop-shadow(0 15px 13px rgba(0,0,0,.16))}
.vial-cap{position:absolute;top:0;left:7px;right:7px;height:31px;border-radius:7px 7px 4px 4px;background:linear-gradient(90deg,#777,#d8d8d8 22%,#999 52%,#e5e5e5 78%,#777);border:1px solid #777;z-index:2}
.vial-cap:after{content:"";position:absolute;left:3px;right:3px;bottom:5px;height:2px;background:rgba(0,0,0,.2);box-shadow:0 -5px rgba(0,0,0,.12)}
.vial-glass{position:absolute;top:27px;left:0;right:0;bottom:0;border-radius:8px 8px 15px 15px;background:linear-gradient(90deg,rgba(255,255,255,.95),rgba(225,230,232,.6) 18%,rgba(255,255,255,.9) 50%,rgba(205,211,214,.6) 78%,rgba(255,255,255,.9));border:1px solid #b9bfc2;box-shadow:inset 8px 0 14px rgba(255,255,255,.7),inset -8px 0 14px rgba(0,0,0,.04);overflow:hidden}
.vial-glass:after{content:"";position:absolute;left:8px;right:8px;bottom:8px;height:18px;border-radius:0 0 9px 9px;background:linear-gradient(rgba(245,245,245,.3),rgba(220,220,220,.65))}
.vial-label{position:absolute;left:6px;right:6px;top:37px;min-height:57px;background:#0a0a0a;color:#fff;border-radius:3px;padding:7px 4px;text-align:center;display:flex;flex-direction:column;justify-content:center;align-items:center;z-index:2}
.vial-label small{font-size:6px;letter-spacing:.18em;color:#aaa}.vial-label b{font-size:8px;line-height:1.15;margin:4px 0;max-width:100%;overflow-wrap:anywhere}.vial-label span{font-size:5px;letter-spacing:.08em;color:#cfcfcf}
.pack-badge{position:absolute;right:10px;top:10px;border:1px solid #d6d6d6;background:rgba(255,255,255,.88);backdrop-filter:blur(5px);padding:5px 7px;border-radius:999px;font-size:8px;font-weight:800;letter-spacing:.08em;color:#555}
.product-image{border:0;width:100%;cursor:pointer}
.modal-image{position:relative}.modal-vial{transform:scale(1.65)}.modal-pack{right:16px;top:16px}
@media(max-width:620px){.singles-section{padding:38px 0 42px}.modern-vial{transform:scale(.9)}.modal-vial{transform:scale(1.35)}}

/* V3 mobile/header collision fixes */
@media (min-width:901px){
  .nav-wrap{grid-template-columns:minmax(210px,1fr) auto minmax(210px,1fr)}
  .brand{white-space:nowrap;min-width:0}
  .desktop-nav{white-space:nowrap}
}
@media (max-width:1040px) and (min-width:901px){
  .desktop-nav{gap:17px}
  .nav-wrap{gap:12px}
  .nav-cta{padding-inline:13px}
  .brand{font-size:14px}
}
@media (max-width:900px){
  .nav-wrap{display:flex;justify-content:space-between}
  .brand{white-space:nowrap;max-width:calc(100% - 52px)}
  .brand span:last-child{overflow:hidden;text-overflow:ellipsis}
  .mobile-menu-btn{flex:0 0 38px}
}
@media (max-width:390px){
  .brand{font-size:14px;gap:8px}
  .brand-mark{width:28px;height:28px}
}
.kit-section{padding-top:54px}

/* V4: navigation only appears inside hamburger menu on every screen */
.desktop-nav,
.nav-cta{
  display:none !important;
}
.nav-wrap{
  display:flex !important;
  justify-content:space-between;
  align-items:center;
  min-height:56px;
}
.mobile-menu-btn{
  display:flex !important;
  width:38px;
  height:38px;
  flex:0 0 38px;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  align-items:center;
}
.mobile-menu-btn span{
  width:18px;
  height:2px;
  background:#111;
  border-radius:2px;
}
.mobile-nav{
  display:grid !important;
  grid-template-rows:0fr;
  overflow:hidden;
  transition:grid-template-rows .2s ease,padding .2s ease;
  gap:0;
}
.mobile-nav > *{overflow:hidden}
.mobile-nav.open{
  grid-template-rows:repeat(5,auto);
  padding-bottom:12px;
  gap:4px;
}
.mobile-nav a{
  padding:10px 0;
  font-size:14px;
}
.mobile-nav .btn{
  margin-top:4px;
  width:100%;
}
.brand{
  white-space:nowrap;
  max-width:calc(100% - 52px);
}