:root{
    --ink:#072A54;
    --navy:#0B3D82;
    --blue:#1C9AE0;
    --blue-light:#4FC5F2;
    --blue-pale:#DCF0FC;
    --paper:#FFFFFF;
    --paper-tint:#F3F9FD;
    --rule:#D7E7F3;
    --ink-soft:#4C6482;
    --gold:#C9963A;
    --font:'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 10px;
    --radius-lg: 20px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:var(--font);
    color:var(--ink);
    background:var(--paper);
    line-height:1.55;
    -webkit-font-smoothing:antialiased;
  }
  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
    *{animation-duration:0.01ms !important; transition-duration:0.01ms !important;}
  }
  a{color:inherit;}
  h1,h2,h3,h4{font-family:var(--font); font-weight:700; margin:0; letter-spacing:-0.01em; color:var(--ink);}
  p{margin:0;}
  button{font-family:var(--font); cursor:pointer;}
  .label{
    font-family:var(--font); font-size:12px; letter-spacing:0.09em; color:var(--blue);
    text-transform:uppercase; font-weight:700;
  }
  .container{max-width:1180px; margin:0 auto; padding:0 28px;}
  .rule{border:none; border-top:1px solid var(--rule); margin:0;}
  .visually-hidden{position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0);}

  /* ---------- HEADER ---------- */
  header{
    position:sticky; top:0; z-index:40;
    background:rgba(255,255,255,0.92); backdrop-filter:blur(10px);
    border-bottom:1px solid var(--rule);
    transition:box-shadow .2s;
  }
  header.scrolled{box-shadow:0 4px 24px rgba(7,42,84,0.06);}
  .nav-row{
    display:flex; align-items:center; justify-content:space-between;
    height:72px;
  }
  .brand{display:flex; align-items:center; gap:11px; text-decoration:none;}
  .brand-mark-img{width:34px; height:auto; display:block;}
  .brand-name{font-family:var(--font); font-weight:800; font-size:21px; letter-spacing:-0.01em; line-height:1;}
  .brand-name .b1{color:var(--navy);}
  .brand-name .b2{color:var(--blue);}
  .brand-name small{display:block; font-family:var(--font); font-size:9.5px; letter-spacing:0.16em; color:var(--blue-light); font-weight:700; text-transform:uppercase; margin-top:3px;}
  nav.primary{display:flex; align-items:center; gap:30px;}
  nav.primary a{
    font-size:14.5px; font-weight:600; text-decoration:none; color:var(--ink-soft);
    padding:6px 0; border-bottom:2px solid transparent; transition:color .15s, border-color .15s;
  }
  nav.primary a:hover{color:var(--navy); border-bottom-color:var(--blue-light);}
  .cart-btn{
    display:flex; align-items:center; gap:9px;
    background:var(--navy); color:#fff; border:none;
    padding:11px 18px; border-radius:var(--radius); font-size:14px; font-weight:700;
    transition:background .15s, transform .15s;
  }
  .cart-btn:hover{background:var(--ink); transform:translateY(-1px);}
  .cart-count{
    background:var(--blue-light); color:var(--ink); font-size:11.5px; font-weight:800;
    min-width:19px; height:19px; border-radius:50%; display:flex; align-items:center; justify-content:center;
  }
  .mobile-toggle{display:none; background:none; border:1px solid var(--rule); border-radius:var(--radius); padding:9px 11px;}
  .mobile-toggle span, .mobile-toggle span::before, .mobile-toggle span::after{
    content:""; display:block; width:18px; height:2px; background:var(--navy); position:relative; border-radius:2px;
  }
  .mobile-toggle span::before{position:absolute; top:-6px;}
  .mobile-toggle span::after{position:absolute; top:6px;}

  /* ---------- HERO ---------- */
  .hero{padding:76px 0 0; position:relative; overflow:hidden;}
  .hero-grid{display:grid; grid-template-columns:1.1fr 0.9fr; gap:56px; align-items:center; position:relative; z-index:2;}
  .hero-eyebrow{font-size:12.5px; letter-spacing:0.09em; color:var(--blue); text-transform:uppercase; margin-bottom:20px; display:inline-block; font-weight:700;}
  .hero h1{font-size:46px; line-height:1.14; max-width:16ch; margin-bottom:22px;}
  .hero h1 .accent{color:var(--blue);}
  .hero-lede{font-size:17px; color:var(--ink-soft); max-width:46ch; margin-bottom:30px;}
  .hero-actions{display:flex; gap:14px; flex-wrap:wrap;}
  .btn-primary{
    background:var(--navy); color:#fff; border:none; padding:14px 26px;
    border-radius:var(--radius); font-weight:700; font-size:15px; text-decoration:none; display:inline-block;
    transition:background .15s, transform .15s, box-shadow .15s;
    box-shadow:0 8px 20px rgba(11,61,130,0.18);
  }
  .btn-primary:hover{background:var(--ink); transform:translateY(-2px); box-shadow:0 10px 26px rgba(11,61,130,0.24);}
  .btn-secondary{
    background:#fff; color:var(--navy); border:1.5px solid var(--rule); padding:12.5px 25px;
    border-radius:var(--radius); font-weight:700; font-size:15px; text-decoration:none; display:inline-block;
    transition:border-color .15s, transform .15s;
  }
  .btn-secondary:hover{border-color:var(--blue); transform:translateY(-2px);}

  .hero-visual{
    position:relative; display:flex; align-items:center; justify-content:center;
    animation:floatIn .9s ease-out;
  }
  @keyframes floatIn{
    from{opacity:0; transform:translateY(18px) scale(0.98);}
    to{opacity:1; transform:translateY(0) scale(1);}
  }
  .hero-visual img{width:100%; max-width:380px; filter:drop-shadow(0 24px 40px rgba(11,61,130,0.16));}
  .hero-glow{
    position:absolute; width:420px; height:420px; border-radius:50%;
    background:radial-gradient(circle, rgba(79,197,242,0.22) 0%, rgba(79,197,242,0) 70%);
    z-index:1; top:50%; left:50%; transform:translate(-50%,-50%);
    animation:pulse 6s ease-in-out infinite;
  }
  @keyframes pulse{
    0%,100%{opacity:0.7; transform:translate(-50%,-50%) scale(1);}
    50%{opacity:1; transform:translate(-50%,-50%) scale(1.06);}
  }

  .specimen-card{
    border:1px solid var(--rule); background:var(--paper); border-radius:var(--radius-lg);
    box-shadow:0 20px 44px rgba(7,42,84,0.07);
  }
  .specimen-head{
    padding:16px 22px; border-bottom:1px solid var(--rule); display:flex; justify-content:space-between; align-items:center;
    background:var(--paper-tint); border-radius:var(--radius-lg) var(--radius-lg) 0 0;
  }
  .specimen-head .label{font-size:11px;}
  .specimen-body{padding:4px 0;}
  .specimen-body-3col{display:grid; grid-template-columns:1fr 1fr 1fr; gap:0;}
  .home-feature-grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:22px;}
  .specimen-field{
    display:flex; justify-content:space-between; gap:16px;
    padding:15px 22px; border-bottom:1px solid var(--rule);
  }
  .specimen-field:last-child{border-bottom:none;}
  .specimen-field .k{font-size:13px; color:var(--ink-soft); font-weight:500;}
  .specimen-field .v{font-size:13.5px; font-weight:700; text-align:right; color:var(--navy);}

  .tag{
    display:inline-block; font-size:11px; letter-spacing:0.03em;
    padding:4px 10px; border-radius:20px; font-weight:700;
  }
  .tag-well{background:#E2F2FC; color:#0B6FA8;}
  .tag-broad{background:#FCF0DC; color:#96701E;}
  .tag-verify{background:#FBE5E5; color:#A23F3F;}

  /* wave divider */
  .wave-divider{display:block; width:100%; height:auto; margin-top:64px;}

  /* ---------- SECTION SCAFFOLD ---------- */
  section{padding:90px 0;}
  section.tinted{background:var(--paper-tint);}
  .section-head{max-width:640px; margin-bottom:46px;}
  .section-head .label{margin-bottom:14px; display:inline-block;}
  .section-head h2{font-size:32px; margin-bottom:14px;}
  .section-head p{color:var(--ink-soft); font-size:16px;}

  /* ---------- LIBRARY ---------- */
  .library-layout{display:grid; grid-template-columns:230px 1fr; gap:40px; align-items:start;}
  .filter-col{position:sticky; top:96px;}
  .filter-title{font-size:12px; letter-spacing:0.07em; text-transform:uppercase; color:var(--ink-soft); margin-bottom:16px; display:block; font-weight:700;}
  .filter-list{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:3px;}
  .filter-list button{
    width:100%; text-align:left; background:none; border:none; padding:10px 12px; font-size:14px; font-weight:600;
    color:var(--ink-soft); border-radius:var(--radius); border-left:3px solid transparent; transition:background .15s, color .15s;
  }
  .filter-list button:hover{background:var(--paper-tint); color:var(--navy);}
  .filter-list button.active{color:var(--navy); border-left-color:var(--blue); background:var(--blue-pale);}
  .filter-count{float:right; font-size:11.5px; color:var(--ink-soft); font-weight:600;}

  .mobile-filter{display:none; margin-bottom:22px;}
  .mobile-filter select{
    width:100%; padding:13px 16px; border:1.5px solid var(--rule); border-radius:var(--radius);
    font-family:var(--font); font-size:14.5px; font-weight:600; background:var(--paper); color:var(--ink);
  }

  .peptide-index{border-top:1px solid var(--rule);}
  .peptide-row{
    display:grid; grid-template-columns:52px 1.3fr 1.4fr 138px 22px;
    gap:18px; align-items:center; padding:19px 10px; border-bottom:1px solid var(--rule);
    background:none; border-left:none; border-right:none; border-top:none;
    width:100%; text-align:left; border-radius:var(--radius); transition:background .15s;
  }
  .peptide-row:hover{background:var(--paper-tint);}
  .peptide-row .num{font-size:13px; color:var(--blue-light); font-weight:800;}
  .peptide-row .name{font-weight:700; font-size:16px;}
  .peptide-row .name small{display:block; font-weight:500; font-size:12px; color:var(--ink-soft); margin-top:2px;}
  .peptide-row .studied{font-size:13.5px; color:var(--ink-soft); font-weight:500;}
  .peptide-row .chev{font-size:19px; color:var(--rule); transition:transform .15s, color .15s;}
  .peptide-row[aria-expanded="true"] .chev{transform:rotate(90deg); color:var(--blue);}

  .peptide-detail{
    display:none; padding:6px 10px 32px 82px; border-bottom:1px solid var(--rule);
  }
  .peptide-detail.open{display:block; animation:dropIn .22s ease-out;}
  @keyframes dropIn{ from{opacity:0; transform:translateY(-6px);} to{opacity:1; transform:translateY(0);} }
  .peptide-detail-grid{display:grid; grid-template-columns:1fr 1fr; gap:30px; margin-top:6px;}
  .detail-block h4{font-size:12px; text-transform:uppercase; letter-spacing:0.06em; color:var(--blue); font-weight:700; margin-bottom:9px;}
  .detail-block p{font-size:14.5px; color:var(--ink); line-height:1.65;}

  /* ---------- SAFETY ---------- */
  .risk-banner{
    background:linear-gradient(135deg, var(--ink) 0%, var(--navy) 100%); color:#fff; border-radius:var(--radius-lg); padding:32px 34px; margin-bottom:50px;
    display:grid; grid-template-columns:auto 1fr; gap:24px; align-items:start;
  }
  .risk-banner .mark-badge{font-size:12px; color:var(--gold); letter-spacing:0.08em; text-transform:uppercase; border:1px solid rgba(201,150,58,0.5); padding:7px 12px; border-radius:20px; white-space:nowrap; font-weight:700;}
  .risk-banner p{font-size:15px; color:#D7E7F5; line-height:1.7;}
  .risk-banner p + p{margin-top:12px;}
  .risk-banner strong{color:#fff;}

  .exclusion-grid{display:grid; grid-template-columns:repeat(2, 1fr); gap:1px; background:var(--rule); border:1px solid var(--rule); border-radius:var(--radius-lg); overflow:hidden;}
  .exclusion-item{background:var(--paper); padding:20px 22px;}
  .exclusion-item .who{font-weight:700; font-size:14.5px; margin-bottom:6px; color:var(--navy);}
  .exclusion-item .why{font-size:13.5px; color:var(--ink-soft); line-height:1.55;}

  /* ---------- HOW BAC WATER WORKS ---------- */
  .explainer{display:grid; grid-template-columns:repeat(3, 1fr); gap:1px; background:var(--rule); border:1px solid var(--rule); margin-top:8px; border-radius:var(--radius-lg); overflow:hidden;}
  .explainer-item{background:var(--paper); padding:28px 26px;}
  .explainer-item .label{margin-bottom:12px; display:inline-block;}
  .explainer-item p{font-size:14.5px; color:var(--ink-soft); line-height:1.65;}

  /* ---------- SHOP ---------- */
  .shop-grid{display:grid; grid-template-columns:repeat(2, 1fr); gap:26px;}
  .product-card{border:1px solid var(--rule); border-radius:var(--radius-lg); background:var(--paper); overflow:hidden; transition:box-shadow .2s, transform .2s;}
  .product-card:hover{box-shadow:0 20px 40px rgba(7,42,84,0.09); transform:translateY(-3px);}
  .product-swatch{
    height:160px; background:linear-gradient(135deg, var(--navy) 0%, var(--blue) 65%, var(--blue-light) 140%);
    position:relative; display:flex; align-items:flex-end; padding:18px 22px; overflow:hidden;
  }
  .product-swatch .lot{font-size:11.5px; color:#EAF7FE; letter-spacing:0.05em; font-weight:700;}
  .product-swatch .drop-icon{position:absolute; top:16px; right:20px; width:34px; height:auto; opacity:0.9;}
  .product-body{padding:24px 24px 26px;}
  .product-body h3{font-size:20px; margin-bottom:7px;}
  .product-body .desc{font-size:13.5px; color:var(--ink-soft); margin-bottom:18px; display:block;}
  .product-meta{display:flex; justify-content:space-between; align-items:center; margin-bottom:20px;}
  .price{font-size:22px; font-weight:800; color:var(--navy);}
  .price small{font-size:12px; font-weight:500; color:var(--ink-soft);}
  .qty-row{display:flex; align-items:center; border:1.5px solid var(--rule); border-radius:var(--radius); overflow:hidden;}
  .qty-row button{background:var(--paper-tint); border:none; width:34px; height:36px; font-size:17px; color:var(--navy); font-weight:700;}
  .qty-row button:hover{background:var(--blue-pale);}
  .qty-row .qty-val{width:36px; text-align:center; font-size:14.5px; font-weight:700;}
  .add-row{display:flex; gap:10px;}
  .add-btn{
    flex:1; background:var(--navy); color:#fff; border:none; padding:12px 14px; border-radius:var(--radius);
    font-weight:700; font-size:14px; transition:background .15s;
  }
  .add-btn:hover{background:var(--ink);}
  .product-note{font-size:12px; color:var(--ink-soft); margin-top:16px; border-top:1px solid var(--rule); padding-top:16px;}

  /* ---------- FOOTER ---------- */
  footer{background:var(--ink); color:#B9CBE0; padding:60px 0 32px;}
  .footer-grid{display:grid; grid-template-columns:1.3fr 1fr 1fr; gap:42px; margin-bottom:38px;}
  .footer-brand-row{display:flex; align-items:center; gap:10px; margin-bottom:14px;}
  .footer-brand-row img{width:28px; height:auto;}
  .footer-brand-row span{font-size:19px; font-weight:800; color:#fff;}
  footer h4{font-size:12px; letter-spacing:0.07em; text-transform:uppercase; color:var(--blue-light); margin-bottom:16px; font-weight:700;}
  footer p{font-size:13.5px; line-height:1.7; color:#9FB4CC;}
  footer ul{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:10px;}
  footer a{font-size:13.5px; text-decoration:none; color:#B9CBE0; transition:color .15s;}
  footer a:hover{color:#fff;}
  .footer-legal{border-top:1px solid rgba(255,255,255,0.12); padding-top:24px; font-size:12px; color:#7C90A8; line-height:1.7;}

  /* ---------- CART DRAWER ---------- */
  .overlay{
    position:fixed; inset:0; background:rgba(7,42,84,0.45); z-index:60; opacity:0; pointer-events:none; transition:opacity .2s;
  }
  .overlay.show{opacity:1; pointer-events:auto;}
  .drawer{
    position:fixed; top:0; right:0; bottom:0; width:430px; max-width:92vw; background:var(--paper);
    z-index:61; transform:translateX(100%); transition:transform .28s cubic-bezier(.4,0,.2,1); display:flex; flex-direction:column;
    box-shadow:-12px 0 36px rgba(7,42,84,0.18);
  }
  .drawer.show{transform:translateX(0);}
  .drawer-head{padding:24px 26px; border-bottom:1px solid var(--rule); display:flex; justify-content:space-between; align-items:center;}
  .drawer-head h3{font-size:20px;}
  .drawer-close{background:none; border:none; font-size:24px; color:var(--ink-soft); line-height:1; padding:4px;}
  .drawer-close:hover{color:var(--navy);}
  .drawer-body{flex:1; overflow-y:auto; padding:22px 26px;}
  .drawer-empty{color:var(--ink-soft); font-size:14.5px; padding:44px 0; text-align:center;}
  .line-item{display:flex; gap:15px; padding:17px 0; border-bottom:1px solid var(--rule);}
  .line-swatch{width:54px; height:54px; border-radius:var(--radius); background:linear-gradient(135deg, var(--navy), var(--blue-light)); flex-shrink:0;}
  .line-info{flex:1;}
  .line-info .lname{font-weight:700; font-size:14.5px; margin-bottom:3px;}
  .line-info .lmeta{font-size:12.5px; color:var(--ink-soft); font-weight:500;}
  .line-controls{display:flex; align-items:center; justify-content:space-between; margin-top:9px;}
  .line-remove{background:none; border:none; font-size:12.5px; color:#A23F3F; text-decoration:underline; padding:0; font-weight:600;}
  .drawer-foot{border-top:1px solid var(--rule); padding:22px 26px; background:var(--paper-tint);}
  .subtotal-row{display:flex; justify-content:space-between; font-size:15.5px; font-weight:700; margin-bottom:16px;}
  .subtotal-row .amt{font-size:18px; color:var(--navy);}
  .checkout-btn{
    width:100%; background:var(--navy); color:#fff; border:none; padding:15px; border-radius:var(--radius);
    font-weight:700; font-size:15.5px; transition:background .15s;
  }
  .checkout-btn:hover{background:var(--ink);}
  .checkout-btn:disabled{background:var(--rule); color:#8FA1B8; cursor:not-allowed;}
  .drawer-note{font-size:12px; color:var(--ink-soft); margin-top:11px; text-align:center;}

  /* ---------- CHECKOUT MODAL ---------- */
  .modal{
    position:fixed; inset:0; z-index:70; display:none; align-items:center; justify-content:center; padding:20px;
  }
  .modal.show{display:flex;}
  .modal-card{
    background:var(--paper); border-radius:var(--radius-lg); max-width:480px; width:100%; padding:34px;
    box-shadow:0 24px 64px rgba(7,42,84,0.32);
  }
  .modal-card h3{font-size:21px; margin-bottom:13px;}
  .modal-card p{font-size:14.5px; color:var(--ink-soft); line-height:1.65; margin-bottom:11px;}
  .modal-card .callout{
    background:var(--paper-tint); border:1px solid var(--rule); border-radius:var(--radius); padding:15px 17px;
    font-size:13.5px; color:var(--ink-soft); margin:17px 0;
  }
  .modal-actions{display:flex; gap:10px; margin-top:22px;}
  .modal-actions .btn-secondary, .modal-actions .btn-primary{flex:1; text-align:center; border:1.5px solid var(--rule);}

  /* ---------- AUTH GATE ---------- */
  .auth-screen{
    position:fixed; inset:0; z-index:100; display:none; align-items:center; justify-content:center;
    background:linear-gradient(160deg, var(--ink) 0%, var(--navy) 55%, var(--blue) 130%); padding:24px;
  }
  .auth-card{
    background:var(--paper); border-radius:var(--radius-lg); max-width:420px; width:100%;
    padding:38px 36px 32px; box-shadow:0 30px 70px rgba(7,42,84,0.35);
  }
  .auth-brand{display:flex; align-items:center; justify-content:center; gap:10px; margin-bottom:26px;}
  .auth-brand img{width:32px; height:auto;}
  .auth-brand span{font-size:22px; font-weight:800;}
  .auth-brand .b1{color:var(--navy);} .auth-brand .b2{color:var(--blue);}
  .auth-tabs{display:flex; border:1px solid var(--rule); border-radius:var(--radius); overflow:hidden; margin-bottom:24px;}
  .auth-tab{flex:1; background:var(--paper-tint); border:none; padding:12px; font-weight:700; font-size:13.5px; color:var(--ink-soft); transition:background .15s, color .15s;}
  .auth-tab.active{background:var(--navy); color:#fff;}
  .auth-form{display:flex; flex-direction:column; gap:16px;}
  .auth-form label{display:flex; flex-direction:column; gap:6px; font-size:13px; font-weight:600; color:var(--ink-soft);}
  .auth-form label.checkbox-row{flex-direction:row; align-items:flex-start; gap:9px; font-weight:500; font-size:12.5px; line-height:1.5;}
  .auth-form label.checkbox-row input{margin-top:2px;}
  .auth-form input[type="email"], .auth-form input[type="password"], .auth-form input[type="text"]{
    padding:12px 14px; border:1.5px solid var(--rule); border-radius:var(--radius); font-family:var(--font); font-size:14.5px; color:var(--ink);
  }
  .auth-form input:focus{outline:2px solid var(--blue-light); outline-offset:1px; border-color:var(--blue);}
  .auth-submit{width:100%; text-align:center; margin-top:4px;}
  .auth-error{font-size:13px; color:#A23F3F; font-weight:600; min-height:0;}
  .auth-footnote{font-size:12.5px; color:var(--ink-soft); text-align:center; margin-top:22px; line-height:1.6;}
  .auth-admin-link, .footer-textlink{
    display:block; width:100%; text-align:center; background:none; border:none; margin-top:14px;
    font-size:12.5px; font-weight:600; color:var(--blue); text-decoration:underline; padding:4px;
  }
  .footer-textlink{width:auto; margin-top:0; color:#B9CBE0; text-decoration:underline; display:inline-block;}
  .footer-textlink:hover{color:#fff;}
  .auth-demo-hint{
    background:var(--paper-tint); border:1px dashed var(--rule); border-radius:var(--radius); padding:12px 14px;
    font-size:12px; color:var(--ink-soft); margin-bottom:20px; line-height:1.6;
  }
  .auth-demo-hint strong{color:var(--navy);}

  /* ---------- CHAT BUBBLE ---------- */
  #chatBubbleWrap{position:fixed; bottom:26px; right:26px; z-index:80;}
  .chat-fab{
    width:58px; height:58px; border-radius:50%; background:var(--navy); border:none; color:#fff;
    box-shadow:0 12px 28px rgba(7,42,84,0.32); display:flex; align-items:center; justify-content:center;
    transition:background .15s, transform .15s; font-size:24px;
  }
  .chat-fab:hover{background:var(--ink); transform:translateY(-2px);}
  .chat-panel{
    position:fixed; bottom:96px; right:26px; width:360px; max-width:88vw; height:480px; max-height:70vh;
    background:var(--paper); border-radius:var(--radius-lg); box-shadow:0 24px 60px rgba(7,42,84,0.3);
    display:none; flex-direction:column; overflow:hidden; border:1px solid var(--rule);
  }
  .chat-panel.open{display:flex;}
  .chat-head{background:var(--navy); color:#fff; padding:16px 18px; display:flex; justify-content:space-between; align-items:center;}
  .chat-head div{font-weight:700; font-size:15px;}
  .chat-head small{display:block; font-weight:500; font-size:11.5px; color:var(--blue-pale); margin-top:2px;}
  .chat-close{background:none; border:none; color:#fff; font-size:20px; padding:2px;}
  .chat-messages{flex:1; overflow-y:auto; padding:16px 18px; display:flex; flex-direction:column; gap:12px; background:var(--paper-tint);}
  .chat-msg{max-width:82%; padding:10px 13px; border-radius:14px; font-size:13.5px; line-height:1.5; white-space:pre-line;}
  .chat-msg.bot{background:#fff; border:1px solid var(--rule); align-self:flex-start; border-bottom-left-radius:4px;}
  .chat-msg.user{background:var(--navy); color:#fff; align-self:flex-end; border-bottom-right-radius:4px;}
  .chat-input-row{display:flex; gap:8px; padding:14px; border-top:1px solid var(--rule); background:var(--paper);}
  .chat-input-row input{flex:1; padding:11px 13px; border:1.5px solid var(--rule); border-radius:var(--radius); font-family:var(--font); font-size:13.5px;}
  .chat-input-row button{background:var(--navy); color:#fff; border:none; width:42px; border-radius:var(--radius); font-size:16px;}
  .chat-input-row button:hover{background:var(--ink);}

  /* ---------- ADMIN ---------- */
  .admin-screen{position:fixed; inset:0; z-index:100; display:none; background:var(--paper-tint);}
  .admin-topbar{background:var(--ink); color:#fff; padding:16px 28px; display:flex; justify-content:space-between; align-items:center;}
  .admin-topbar .abrand{display:flex; align-items:center; gap:10px; font-weight:800; font-size:17px;}
  .admin-topbar .abrand img{width:24px; height:auto;}
  .admin-topbar .actions{display:flex; gap:16px; align-items:center;}
  .admin-topbar button{background:rgba(255,255,255,0.12); color:#fff; border:none; padding:9px 16px; border-radius:var(--radius); font-weight:600; font-size:13px;}
  .admin-topbar button:hover{background:rgba(255,255,255,0.2);}
  .admin-body{padding:32px 28px; max-width:1100px; margin:0 auto; height:calc(100vh - 66px); overflow-y:auto;}
  .admin-warning{
    background:#FCF0DC; border:1px solid #E9CE94; color:#7A5A17; border-radius:var(--radius); padding:16px 18px;
    font-size:13.5px; line-height:1.6; margin-bottom:26px; font-weight:600;
  }
  .admin-stats{display:grid; grid-template-columns:repeat(3,1fr); gap:18px; margin-bottom:32px;}
  .admin-stats-4col{grid-template-columns:repeat(4,1fr);}
  .admin-stat{background:#fff; border:1px solid var(--rule); border-radius:var(--radius-lg); padding:20px 22px;}
  .admin-stat .num{font-size:28px; font-weight:800; color:var(--navy);}
  .admin-stat .lbl{font-size:12.5px; color:var(--ink-soft); font-weight:600; margin-top:4px;}
  .admin-section-title{font-size:17px; font-weight:700; margin-bottom:14px; margin-top:8px;}
  .admin-table-wrap{background:#fff; border:1px solid var(--rule); border-radius:var(--radius-lg); overflow:hidden; margin-bottom:32px;}
  table.admin-table{width:100%; border-collapse:collapse;}
  table.admin-table th{
    text-align:left; font-size:11.5px; text-transform:uppercase; letter-spacing:0.05em; color:var(--ink-soft);
    padding:12px 18px; border-bottom:1px solid var(--rule); font-weight:700; background:var(--paper-tint);
  }
  table.admin-table td{padding:13px 18px; border-bottom:1px solid var(--rule); font-size:13.5px;}
  table.admin-table tr:last-child td{border-bottom:none;}
  .status-pill{font-size:11px; font-weight:700; padding:3px 10px; border-radius:20px;}
  .status-fulfilled{background:#E2F2FC; color:#0B6FA8;}
  .status-pending{background:#FCF0DC; color:#96701E;}
  .admin-empty{padding:24px; text-align:center; color:var(--ink-soft); font-size:13.5px;}

  @media (max-width: 640px){
    .admin-stats{grid-template-columns:1fr;}
    .admin-body{padding:22px 16px;}
    table.admin-table{font-size:12.5px;}
    .chat-panel{right:12px; bottom:88px; width:calc(100vw - 24px);}
    #chatBubbleWrap{right:16px; bottom:16px;}
  }

  @media (max-width: 900px){
    nav.primary{display:none;}
    .mobile-toggle{display:flex; align-items:center; justify-content:center;}
    .hero-grid{grid-template-columns:1fr;}
    .hero h1{font-size:34px;}
    .hero-visual img{max-width:260px;}
    .footer-grid{grid-template-columns:1fr; gap:30px;}
    .library-layout{grid-template-columns:1fr;}
    .filter-col{display:none;}
    .mobile-filter{display:block;}
    .peptide-row{grid-template-columns:36px 1fr 20px; row-gap:5px;}
    .peptide-row .studied{grid-column:2 / 3; grid-row:2;}
    .peptide-detail{padding-left:10px;}
    .peptide-detail-grid{grid-template-columns:1fr;}
    .exclusion-grid{grid-template-columns:1fr;}
    .explainer{grid-template-columns:1fr;}
    .shop-grid{grid-template-columns:1fr;}
    .specimen-body-3col{grid-template-columns:1fr; gap:14px;}
    .home-feature-grid{grid-template-columns:1fr;}
    .lot-check-form{flex-direction:column; align-items:stretch;}
    section{padding:60px 0;}
  }
  @media (max-width: 480px){
    .nav-row{ gap:8px; }
  }

  /* ---------- VERIFICATION / STATUS BANNERS ---------- */
  .status-banner{
    padding:12px 20px; font-size:13.5px; font-weight:600; text-align:center;
    display:none;
  }
  .status-banner.show{display:block;}
  .status-banner.info{background:var(--blue-pale); color:var(--navy);}
  .status-banner.success{background:#E2F8E8; color:#1E7A3D;}
  .status-banner.error{background:#FBE5E5; color:#A23F3F;}
  .status-banner button.linklike{
    background:none; border:none; text-decoration:underline; font-weight:700; font-size:inherit;
    color:inherit; padding:0 0 0 6px; cursor:pointer;
  }

  /* ---------- SHIPPING / CHECKOUT FORM ---------- */
  .ship-form{display:flex; flex-direction:column; gap:12px; padding:20px 24px; border-top:1px solid var(--rule);}
  .ship-form h4{font-size:13px; text-transform:uppercase; letter-spacing:0.05em; color:var(--ink-soft); font-weight:700; margin-bottom:2px;}
  .ship-row{display:grid; grid-template-columns:1fr 1fr; gap:10px;}
  .ship-form input, .ship-form select{
    padding:11px 13px; border:1.5px solid var(--rule); border-radius:var(--radius);
    font-family:var(--font); font-size:13.5px; color:var(--ink); width:100%;
  }
  .ship-form input:focus, .ship-form select:focus{outline:2px solid var(--blue-light); outline-offset:1px; border-color:var(--blue);}
  .ship-error{font-size:12.5px; color:#A23F3F; font-weight:600; min-height:0;}

  /* ---------- ORDER HISTORY ---------- */
  .order-card{border:1px solid var(--rule); border-radius:var(--radius-lg); padding:20px 22px; margin-bottom:16px; background:#fff;}
  .order-card-head{display:flex; justify-content:space-between; align-items:center; margin-bottom:12px; flex-wrap:wrap; gap:8px;}
  .order-card-head .oid{font-weight:700; font-size:14.5px;}
  .order-card-head .odate{font-size:12.5px; color:var(--ink-soft);}
  .order-items-list{font-size:13.5px; color:var(--ink-soft); margin-bottom:10px; line-height:1.7;}
  .order-total-row{display:flex; justify-content:space-between; font-weight:700; font-size:14.5px; padding-top:10px; border-top:1px solid var(--rule);}

  /* ---------- LOT VERIFICATION ---------- */
  .lot-check-form{display:flex; gap:10px; max-width:460px; margin-bottom:24px;}
  .lot-check-form input{flex:1; padding:13px 15px; border:1.5px solid var(--rule); border-radius:var(--radius); font-family:var(--font); font-size:14.5px;}
  .lot-result{border:1px solid var(--rule); border-radius:var(--radius-lg); padding:22px 24px; max-width:460px; display:none;}
  .lot-result.show{display:block;}
  .lot-result.valid{border-color:#9FD6B8; background:#F2FBF5;}
  .lot-result.invalid{border-color:#E9B4B4; background:#FDF2F2;}
  .lot-result .lr-title{font-weight:700; font-size:15.5px; margin-bottom:8px;}
  .lot-result .lr-row{display:flex; justify-content:space-between; font-size:13.5px; padding:6px 0; border-bottom:1px solid rgba(0,0,0,0.06);}
  .lot-result .lr-row:last-child{border-bottom:none;}

  /* ---------- ADMIN PRODUCT / LOT MANAGER ---------- */
  .admin-tabs{display:flex; gap:2px; margin-bottom:26px; border-bottom:1px solid var(--rule); overflow-x:auto; -webkit-overflow-scrolling:touch;}
  .admin-tabs::-webkit-scrollbar{height:4px;}
  .admin-tab-btn{
    background:none; border:none; padding:12px 18px; font-weight:700; font-size:13.5px; color:var(--ink-soft);
    border-bottom:2px solid transparent; margin-bottom:-1px; white-space:nowrap; flex-shrink:0;
  }
  .admin-tab-btn.active{color:var(--navy); border-bottom-color:var(--blue);}
  .admin-panel{display:none;}
  .admin-panel.active{display:block;}

  .product-manager-grid{display:grid; grid-template-columns:1fr 340px; gap:24px; align-items:start;}
  .admin-product-row{display:flex; gap:14px; padding:14px; border:1px solid var(--rule); border-radius:var(--radius); margin-bottom:10px; background:#fff; align-items:center;}
  .admin-product-thumb{width:56px; height:56px; border-radius:var(--radius); object-fit:cover; background:var(--paper-tint); flex-shrink:0;}
  .admin-product-info{flex:1; min-width:0;}
  .admin-product-info .apname{font-weight:700; font-size:14px;}
  .admin-product-info .apmeta{font-size:12px; color:var(--ink-soft);}
  .admin-product-actions{display:flex; gap:8px; flex-shrink:0;}
  .admin-product-actions button{
    background:var(--paper-tint); border:1px solid var(--rule); padding:7px 12px; border-radius:var(--radius);
    font-size:12px; font-weight:600; color:var(--ink);
  }
  .admin-product-actions button.danger{color:#A23F3F;}
  .admin-product-actions button:hover{border-color:var(--blue);}
  .admin-inactive-tag{font-size:10.5px; background:#EEE; color:#888; padding:2px 8px; border-radius:10px; margin-left:8px; font-weight:700;}

  .product-form{background:#fff; border:1px solid var(--rule); border-radius:var(--radius-lg); padding:22px; position:sticky; top:90px;}
  .product-form h4{font-size:15px; margin-bottom:16px;}
  .product-form label{display:flex; flex-direction:column; gap:5px; font-size:12.5px; font-weight:600; color:var(--ink-soft); margin-bottom:13px;}
  .product-form input, .product-form textarea{
    padding:10px 12px; border:1.5px solid var(--rule); border-radius:var(--radius); font-family:var(--font); font-size:13.5px;
  }
  .product-form textarea{resize:vertical; min-height:70px;}
  .product-form .form-error{font-size:12.5px; color:#A23F3F; font-weight:600; margin-bottom:10px; min-height:0;}
  .product-form .form-success{font-size:12.5px; color:#1E7A3D; font-weight:600; margin-bottom:10px; min-height:0;}

  .lot-manager-grid{display:grid; grid-template-columns:1fr 320px; gap:24px; align-items:start; margin-top:36px;}

  /* ---------- COOKIE CONSENT ---------- */
  .cookie-bar{
    position:fixed; bottom:0; left:0; right:0; z-index:90; background:var(--ink); color:#fff;
    padding:16px 24px; display:none; align-items:center; justify-content:space-between; gap:20px; flex-wrap:wrap;
  }
  .cookie-bar.show{display:flex;}
  .cookie-bar p{font-size:13px; color:#C9D8E8; max-width:640px; line-height:1.5;}
  .cookie-bar button{
    background:var(--blue); color:#072A54; border:none; padding:10px 20px; border-radius:var(--radius);
    font-weight:700; font-size:13px; flex-shrink:0;
  }

  @media (max-width: 900px){
    .product-manager-grid, .lot-manager-grid{grid-template-columns:1fr;}
    .product-form{position:static;}
    .ship-row{grid-template-columns:1fr;}
  }


  /* ---------- MULTI-PAGE NAV ADDITIONS ---------- */
  nav.primary a.active{color:var(--navy); border-bottom-color:var(--blue);}
  .breadcrumb{font-family:var(--font); font-size:12.5px; color:var(--ink-soft); margin-bottom:20px;}
  .breadcrumb a{color:var(--blue); text-decoration:none; font-weight:600;}
  .breadcrumb a:hover{text-decoration:underline;}
  .breadcrumb .sep{margin:0 6px; color:var(--rule);}

  /* ---------- PEPTIDE DETAIL PAGE ---------- */
  .peptide-hero{padding:48px 0 36px; border-bottom:1px solid var(--rule);}
  .peptide-hero-top{display:flex; justify-content:space-between; align-items:flex-start; gap:20px; flex-wrap:wrap;}
  .peptide-hero h1{font-size:36px; margin-bottom:6px;}
  .peptide-hero .aka{font-size:15px; color:var(--ink-soft); font-weight:500;}
  .peptide-hero .cat-tag{
    display:inline-block; font-size:12px; font-weight:700; letter-spacing:0.03em; text-transform:uppercase;
    background:var(--blue-pale); color:var(--navy); padding:5px 12px; border-radius:20px; margin-top:10px;
  }
  .peptide-detail-sections{display:grid; grid-template-columns:1fr 1fr; gap:28px; margin-top:36px;}
  .peptide-detail-sections .full{grid-column:1 / -1;}
  .pd-block{background:var(--paper); border:1px solid var(--rule); border-radius:var(--radius-lg); padding:26px 28px;}
  .pd-block h3{font-size:12.5px; text-transform:uppercase; letter-spacing:0.05em; color:var(--blue); font-weight:700; margin-bottom:12px;}
  .pd-block p{font-size:15px; color:var(--ink); line-height:1.75;}
  .pd-pubmed-link{
    display:inline-flex; align-items:center; gap:8px; margin-top:8px; font-size:13.5px; font-weight:700;
    color:var(--navy); text-decoration:none; border:1.5px solid var(--rule); padding:10px 16px; border-radius:var(--radius);
  }
  .pd-pubmed-link:hover{border-color:var(--blue);}
  .related-grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:14px; margin-top:14px;}
  .related-card{
    display:block; border:1px solid var(--rule); border-radius:var(--radius); padding:14px 16px; text-decoration:none;
    color:var(--ink); background:#fff;
  }
  .related-card:hover{border-color:var(--blue);}
  .related-card .rname{font-weight:700; font-size:13.5px; margin-bottom:3px;}
  .related-card .rstudied{font-size:12px; color:var(--ink-soft);}

  @media (max-width: 900px){
    .peptide-detail-sections{grid-template-columns:1fr;}
    .related-grid{grid-template-columns:1fr;}
    .peptide-hero h1{font-size:27px;}
  }