/* ============================================================
   Halocompounds — Research Use Only (RUO) reference standards
   Design system + global styles
   ============================================================ */
:root{
  --navy:#0b1d2c;
  --navy-2:#10293c;
  --ink:#0f1b24;
  --slate:#46586a;
  --muted:#74889a;
  --line:#dbe4ec;
  --line-soft:#eef3f7;
  --bg:#ffffff;
  --bg-soft:#f5f8fb;
  --teal:#13b0a5;
  --teal-dark:#0e8f86;
  --cyan:#1e9fd6;
  --amber:#b7791f;
  --amber-bg:#fdf6e7;
  --red:#c0392b;
  --ok:#2f8f5b;
  --radius:14px;
  --radius-sm:9px;
  --shadow:0 1px 2px rgba(15,27,36,.06),0 8px 24px rgba(15,27,36,.06);
  --shadow-lg:0 24px 60px rgba(11,29,44,.18);
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  --mono:"SF Mono",ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);color:var(--ink);background:var(--bg);
  line-height:1.6;-webkit-font-smoothing:antialiased;
}
a{color:var(--teal-dark);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.2;letter-spacing:-.02em;color:var(--ink);font-weight:700}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono)}
.center{text-align:center}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;
  padding:12px 22px;border-radius:10px;border:1px solid transparent;cursor:pointer;
  transition:.16s;text-decoration:none;line-height:1}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-dark);text-decoration:none}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--navy-2);text-decoration:none}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--slate);text-decoration:none}
.btn-block{width:100%;justify-content:center}
.btn[disabled]{opacity:.4;cursor:not-allowed;pointer-events:none}

/* ---------- Top compliance bar ---------- */
.compliance-bar{background:var(--navy);color:#cfe0ec;font-size:12.5px;text-align:center;
  padding:8px 16px;letter-spacing:.01em}
.compliance-bar strong{color:#fff}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;justify-content:space-between;height:70px;gap:20px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand .logo{width:32px;height:32px;flex:none}
.brand .name{font-weight:800;font-size:20px;letter-spacing:-.03em;color:var(--navy)}
.brand .name span{color:var(--teal)}
.nav{display:flex;align-items:center;gap:26px}
.nav a{color:var(--ink);font-weight:500;font-size:15px}
.nav a:hover{color:var(--teal-dark);text-decoration:none}
.hd-actions{display:flex;align-items:center;gap:14px}
.cart-btn{position:relative;background:none;border:1px solid var(--line);border-radius:10px;
  width:42px;height:42px;display:grid;place-items:center;cursor:pointer;color:var(--ink)}
.cart-btn:hover{border-color:var(--slate)}
.cart-count{position:absolute;top:-7px;right:-7px;background:var(--teal);color:#fff;
  font-size:11px;font-weight:700;min-width:19px;height:19px;border-radius:10px;
  display:grid;place-items:center;padding:0 5px}
.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:10px;
  width:42px;height:42px;cursor:pointer;color:var(--ink)}
.mobile-nav{display:none;border-top:1px solid var(--line);background:#fff}
.mobile-nav a{display:block;padding:14px 24px;border-bottom:1px solid var(--line-soft);color:var(--ink)}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(165deg,var(--navy) 0%,#0e2638 60%,#103444 100%);color:#eaf2f8;
  position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:480px;height:480px;
  border:1px solid rgba(19,176,165,.25);border-radius:50%;
  box-shadow:0 0 0 40px rgba(19,176,165,.05),0 0 0 90px rgba(19,176,165,.04)}
.hero-inner{padding:84px 0 78px;position:relative;z-index:1;max-width:680px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;
  text-transform:uppercase;letter-spacing:.12em;color:#7fe3d9;background:rgba(19,176,165,.12);
  border:1px solid rgba(19,176,165,.3);padding:6px 13px;border-radius:999px;margin-bottom:22px}
.hero h1{color:#fff;font-size:clamp(34px,5.4vw,52px);margin-bottom:18px}
.hero p{font-size:18px;color:#bcd2e0;max-width:560px;margin-bottom:30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;margin-top:48px;flex-wrap:wrap}
.hero-stats .stat .n{font-size:26px;font-weight:800;color:#fff}
.hero-stats .stat .l{font-size:13px;color:#9fbace}

/* ---------- Sections ---------- */
.section{padding:72px 0}
.section.alt{background:var(--bg-soft)}
.section-head{max-width:620px;margin:0 auto 44px;text-align:center}
.section-head .eyebrow{color:var(--teal-dark);background:rgba(19,176,165,.08);border-color:rgba(19,176,165,.25)}
.section-head h2{font-size:clamp(26px,3.5vw,36px);margin-bottom:12px}
.section-head p{color:var(--slate);font-size:17px}

/* ---------- Feature trust grid ---------- */
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.trust-card .ic{width:40px;height:40px;border-radius:10px;background:rgba(19,176,165,.1);
  color:var(--teal-dark);display:grid;place-items:center;margin-bottom:14px}
.trust-card h3{font-size:16px;margin-bottom:6px}
.trust-card p{font-size:14px;color:var(--slate)}

/* ---------- Product grid ---------- */
.shop-layout{display:grid;grid-template-columns:230px 1fr;gap:36px;align-items:start}
.filters{position:sticky;top:90px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:20px}
.filters h4{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--slate);margin-bottom:12px}
.filters label{display:flex;align-items:center;gap:9px;font-size:14px;padding:5px 0;cursor:pointer;color:var(--ink)}
.filters input{accent-color:var(--teal)}
.search-box{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;
  font-size:14px;margin-bottom:18px;font-family:inherit}
.search-box:focus{outline:none;border-color:var(--teal)}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:.16s}
.pcard:hover{box-shadow:var(--shadow);border-color:#c5d3df;transform:translateY(-2px)}
.pcard .vial{height:150px;background:linear-gradient(160deg,#f0f6fa,#e3eef4);display:grid;place-items:center;position:relative}
.pcard .vial svg{height:88px}
.pcard .ruo-tag{position:absolute;top:10px;left:10px;background:var(--navy);color:#fff;
  font-size:10px;font-weight:700;letter-spacing:.05em;padding:4px 8px;border-radius:6px}
.pcard .purity-tag{position:absolute;top:10px;right:10px;background:#fff;color:var(--teal-dark);
  border:1px solid rgba(19,176,165,.4);font-size:10px;font-weight:700;padding:4px 8px;border-radius:6px}
.pcard .body{padding:16px 16px 18px;display:flex;flex-direction:column;flex:1}
.pcard .cat{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--teal-dark);font-weight:600;margin-bottom:5px}
.pcard h3{font-size:17px;margin-bottom:4px}
.pcard .cas{font-family:var(--mono);font-size:12px;color:var(--muted);margin-bottom:10px}
.pcard .spec-mini{font-size:13px;color:var(--slate);margin-bottom:14px}
.pcard .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px}
.pcard .price{font-size:18px;font-weight:800;color:var(--ink)}
.pcard .price small{font-size:12px;font-weight:500;color:var(--muted)}

/* ---------- Product detail ---------- */
.pd{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.pd-media{background:linear-gradient(160deg,#f0f6fa,#e3eef4);border:1px solid var(--line);
  border-radius:var(--radius);height:420px;display:grid;place-items:center}
.pd-media svg{height:240px}
.pd .cat{font-size:12px;text-transform:uppercase;letter-spacing:.07em;color:var(--teal-dark);font-weight:600;margin-bottom:8px}
.pd h1{font-size:34px;margin-bottom:8px}
.pd .cas{font-family:var(--mono);font-size:13px;color:var(--muted);margin-bottom:18px}
.pd .price-row{display:flex;align-items:baseline;gap:10px;margin:18px 0}
.pd .price-row .price{font-size:30px;font-weight:800}
.spec-table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.spec-table th,.spec-table td{text-align:left;padding:11px 0;border-bottom:1px solid var(--line-soft)}
.spec-table th{color:var(--slate);font-weight:500;width:42%}
.spec-table td{font-weight:600;font-family:var(--mono)}
.size-select{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}
.size-opt{padding:9px 16px;border:1px solid var(--line);border-radius:10px;cursor:pointer;font-size:14px;font-weight:600;background:#fff}
.size-opt.active{border-color:var(--teal);background:rgba(19,176,165,.07);color:var(--teal-dark)}
.qty{display:flex;align-items:center;border:1px solid var(--line);border-radius:10px;overflow:hidden;width:fit-content}
.qty button{width:40px;height:44px;border:none;background:#fff;font-size:18px;cursor:pointer;color:var(--ink)}
.qty input{width:48px;height:44px;border:none;text-align:center;font-size:15px;font-weight:600}
.qty input:focus{outline:none}
.tabs{margin-top:54px;border-top:1px solid var(--line)}
.tab-btns{display:flex;gap:6px;margin-top:18px;flex-wrap:wrap}
.tab-btns button{padding:9px 16px;border:1px solid var(--line);background:#fff;border-radius:8px;cursor:pointer;font-size:14px;font-weight:600;color:var(--slate)}
.tab-btns button.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.tab-panel{padding:22px 0;font-size:15px;color:var(--ink);max-width:780px}
.tab-panel p{margin-bottom:12px;color:var(--slate)}

/* ---------- RUO callout block ---------- */
.ruo-callout{background:var(--amber-bg);border:1px solid #f0e0bd;border-left:4px solid var(--amber);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:16px 18px;margin:22px 0}
.ruo-callout strong{color:var(--amber);display:block;margin-bottom:4px;font-size:14px}
.ruo-callout p{font-size:13.5px;color:#6b5418;margin:0}

/* ---------- Cart drawer ---------- */
.drawer-overlay{position:fixed;inset:0;background:rgba(11,29,44,.45);z-index:60;opacity:0;
  pointer-events:none;transition:.2s}
.drawer-overlay.open{opacity:1;pointer-events:auto}
.drawer{position:fixed;top:0;right:0;height:100%;width:400px;max-width:92vw;background:#fff;z-index:70;
  transform:translateX(100%);transition:.24s;display:flex;flex-direction:column;box-shadow:var(--shadow-lg)}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:20px 22px;border-bottom:1px solid var(--line)}
.drawer-head h3{font-size:18px}
.drawer-close{background:none;border:none;font-size:24px;cursor:pointer;color:var(--slate);line-height:1}
.drawer-body{flex:1;overflow-y:auto;padding:10px 22px}
.cart-line{display:flex;gap:12px;padding:16px 0;border-bottom:1px solid var(--line-soft)}
.cart-line .ci{width:54px;height:54px;border-radius:8px;background:#e3eef4;display:grid;place-items:center;flex:none}
.cart-line .ci svg{height:34px}
.cart-line .meta{flex:1;min-width:0}
.cart-line .meta h4{font-size:14px;margin-bottom:2px}
.cart-line .meta .sz{font-size:12px;color:var(--muted)}
.cart-line .meta .lp{font-size:13px;font-weight:700;margin-top:4px}
.cart-line .rm{background:none;border:none;color:var(--muted);cursor:pointer;font-size:12px;align-self:flex-start}
.cart-line .rm:hover{color:var(--red)}
.drawer-foot{border-top:1px solid var(--line);padding:20px 22px}
.drawer-foot .sub{display:flex;justify-content:space-between;font-size:15px;margin-bottom:6px}
.drawer-foot .sub.total{font-size:18px;font-weight:800}
.drawer-foot .note{font-size:12px;color:var(--muted);margin:10px 0 14px}
.empty-cart{text-align:center;color:var(--muted);padding:60px 20px;font-size:15px}

/* ---------- Forms / checkout ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:600;color:var(--ink)}
.field input,.field select,.field textarea{padding:11px 13px;border:1px solid var(--line);
  border-radius:10px;font-size:15px;font-family:inherit;background:#fff}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--teal)}
.attest{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:8px 0 20px}
.attest .ck{display:flex;gap:11px;align-items:flex-start;padding:9px 0;font-size:13.5px;color:var(--ink)}
.attest .ck input{margin-top:3px;accent-color:var(--teal);flex:none;width:17px;height:17px}
.checkout-layout{display:grid;grid-template-columns:1fr 360px;gap:40px;align-items:start}
.summary{position:sticky;top:90px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.summary h3{font-size:18px;margin-bottom:16px}
.summary .ln{display:flex;justify-content:space-between;font-size:14px;padding:7px 0;color:var(--slate)}
.summary .ln.tot{border-top:1px solid var(--line);margin-top:8px;padding-top:14px;font-size:18px;font-weight:800;color:var(--ink)}

/* ---------- Content pages ---------- */
.page-head{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:54px 0}
.page-head h1{font-size:clamp(28px,4vw,40px)}
.page-head .crumb{font-size:13px;color:var(--muted);margin-bottom:10px}
.doc{max-width:820px;margin:0 auto;padding:56px 0}
.doc h2{font-size:24px;margin:34px 0 12px}
.doc h3{font-size:18px;margin:24px 0 8px}
.doc p{color:var(--slate);margin-bottom:14px}
.doc ul{margin:0 0 16px 22px;color:var(--slate)}
.doc li{margin-bottom:7px}
.doc .updated{font-size:13px;color:var(--muted);margin-bottom:30px}
.callout-strong{background:var(--navy);color:#cfe0ec;border-radius:var(--radius);padding:24px 26px;margin:24px 0}
.callout-strong h3{color:#fff;margin:0 0 8px}
.callout-strong p{color:#bcd2e0;margin:0}

/* ============================================================
   Access gate — combined age verification + RUO confirmation
   Shown on every page load.
   ============================================================ */
.agegate{
  position:fixed;inset:0;z-index:100;
  background:rgba(7,18,28,.88);
  backdrop-filter:blur(6px);
  display:none;align-items:center;justify-content:center;padding:20px;
}
.agegate.show{display:flex}
.ag-box{
  background:#fff;
  border-radius:20px;
  max-width:540px;width:100%;
  padding:44px 42px;
  box-shadow:var(--shadow-lg);
  text-align:left;
}
.ag-logo{
  width:44px;height:44px;
  background:rgba(19,176,165,.1);
  border-radius:12px;
  display:grid;place-items:center;
  margin-bottom:20px;
}
.ag-logo .logo{width:28px;height:28px}
.ag-eyebrow{
  display:inline-flex;align-items:center;
  font-family:var(--mono);font-size:11px;
  text-transform:uppercase;letter-spacing:.12em;
  color:var(--teal-dark);background:rgba(19,176,165,.08);
  border:1px solid rgba(19,176,165,.25);
  padding:5px 11px;border-radius:999px;
  margin-bottom:14px;
}
.ag-title{
  font-size:26px;letter-spacing:-.03em;
  color:var(--navy);margin-bottom:10px;
}
.ag-intro{
  font-size:14.5px;line-height:1.6;
  color:var(--slate);margin-bottom:0;
}
.ag-intro strong{color:var(--ink)}
.ag-divider{
  height:1px;background:var(--line);
  margin:24px 0 18px;
}
.ag-confirm-label{
  font-size:12px;text-transform:uppercase;
  letter-spacing:.07em;font-weight:700;
  color:var(--muted);margin-bottom:14px;
}
.ag-checks{
  display:flex;flex-direction:column;gap:10px;
  margin-bottom:26px;
}
.ag-ck{
  display:flex;align-items:flex-start;gap:13px;
  background:var(--bg-soft);
  border:1.5px solid var(--line);
  border-radius:12px;
  padding:14px 16px;
  cursor:pointer;
  transition:border-color .15s, background .15s;
  user-select:none;
}
.ag-ck:hover{border-color:#b0c8d8}
.ag-ck.checked{
  border-color:var(--teal);
  background:rgba(19,176,165,.05);
}
.ag-ck-box{
  flex:none;
  width:22px;height:22px;
  border-radius:6px;
  border:2px solid var(--line);
  background:#fff;
  display:grid;place-items:center;
  margin-top:1px;
  transition:border-color .15s, background .15s;
  position:relative;
}
.ag-ck-box input{
  position:absolute;opacity:0;width:0;height:0;
}
.ag-ck-box svg{
  width:12px;height:10px;
  color:transparent;
  transition:color .12s;
  stroke-width:2;
}
.ag-ck.checked .ag-ck-box{
  border-color:var(--teal);
  background:var(--teal);
}
.ag-ck.checked .ag-ck-box svg{
  color:#fff;
}
.ag-ck-text{
  font-size:14px;line-height:1.55;color:var(--slate);
}
.ag-ck-text strong{color:var(--ink);font-weight:600}
.ag-enter{
  font-size:15px;
  margin-bottom:16px;
  transition:opacity .2s, background .16s;
}
.ag-exit{
  display:block;text-align:center;
  font-size:13px;color:var(--muted);
  text-decoration:none;
}
.ag-exit:hover{color:var(--slate);text-decoration:none}

/* ---------- Toast ---------- */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);
  background:var(--navy);color:#fff;padding:13px 20px;border-radius:10px;font-size:14px;
  font-weight:500;z-index:90;opacity:0;pointer-events:none;transition:.22s;box-shadow:var(--shadow-lg)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy);color:#9fbace;padding:56px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.1)}
.site-footer .brand .name{color:#fff}
.site-footer .fcol h4{color:#fff;font-size:14px;margin-bottom:14px;letter-spacing:.02em}
.site-footer .fcol a{display:block;color:#9fbace;font-size:14px;padding:5px 0}
.site-footer .fcol a:hover{color:#fff;text-decoration:none}
.footer-blurb{font-size:13.5px;color:#9fbace;margin:14px 0;max-width:300px}
.footer-ruo{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:10px;
  padding:14px 16px;font-size:12px;color:#bcd2e0;margin-top:28px;line-height:1.6}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:22px;font-size:12.5px;color:#7e9cb2}

/* ---------- Utilities ---------- */
.badge-ruo{display:inline-block;background:var(--navy);color:#fff;font-size:11px;font-weight:700;
  letter-spacing:.05em;padding:4px 10px;border-radius:6px}
.hide{display:none!important}
.mt0{margin-top:0}

/* ---------- Responsive ---------- */
@media(max-width:960px){
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .shop-layout{grid-template-columns:1fr}
  .filters{position:static}
  .pd{grid-template-columns:1fr;gap:28px}
  .pd-media{height:300px}
  .checkout-layout{grid-template-columns:1fr}
  .summary{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .nav{display:none}
  .menu-toggle{display:grid;place-items:center}
  .product-grid{grid-template-columns:1fr 1fr}
  .form-grid{grid-template-columns:1fr}
  .hero-stats{gap:26px}
  .footer-grid{grid-template-columns:1fr}
  .ag-box{padding:32px 24px}
}
@media(max-width:460px){
  .product-grid{grid-template-columns:1fr}
}

/* ============================================================
   Email gate — full-page entry gate (shown before the access gate)
   ============================================================ */
.leadgate{position:fixed;inset:0;z-index:200;background:var(--navy);color:#fff;
  display:grid;place-items:center;padding:24px;overflow:auto}
.leadgate .lead-box{max-width:440px;width:100%;text-align:center}
.leadgate .logo{width:54px;height:54px;margin:0 auto 20px;display:block}
.leadgate h2{font-size:26px;margin:0 0 12px}
.leadgate p{font-size:14.5px;line-height:1.55;color:#b9c6d1;margin:0 0 20px}
.leadgate input[type=email]{width:100%;padding:13px 15px;border-radius:11px;
  border:1px solid #2b4255;background:#0f273a;color:#fff;font-size:15px;margin-bottom:12px}
.leadgate input[type=email]::placeholder{color:#7d93a4}
.leadgate input[type=email]:focus{outline:none;border-color:var(--teal,#13b0a5)}
.leadgate .lead-err{color:#ff6b6b;min-height:18px;margin:8px 0 0;font-size:13px}
.leadgate .fine{color:#7d93a4;font-size:12px;margin-top:16px}