:root{
    --bg:#ffffff;
    --surface:#f5f5f2;
    --surface-2:#e9e8e1;
    --text:#1a1a1a;
    --text-muted:#63666d;
    --accent:#1a1a1a;
    --accent-fill:#1a1a1a;
    --accent-ink:#e3f40a;
    --brand-lime:#e3f40a;
    --border:#e2e0d6;
    --border-strong:#c9c5b6;
    --caution:#c1502f;
    --synergy:#2f8f6f;
    --liquid:rgba(26,26,26,0.14);
    --liquid-edge:rgba(26,26,26,0.6);

    --font-display:'Big Shoulders Display','Arial Narrow',sans-serif;
    --font-body:'IBM Plex Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
    --font-mono:'IBM Plex Mono','SFMono-Regular',Consolas,monospace;

    color-scheme: dark;
  }

  *{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:var(--font-body);
    line-height:1.5;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;}
  .wrap{max-width:1180px;margin:0 auto;padding:0 24px;}
  h1,h2,h3{font-family:var(--font-display);font-weight:800;text-transform:uppercase;letter-spacing:0.01em;text-wrap:balance;line-height:0.98;margin:0;}
  .eyebrow{
    font-family:var(--font-mono);
    font-size:12px;
    letter-spacing:0.14em;
    text-transform:uppercase;
    color:var(--accent);
  }
  p{margin:0;}
  .lede{color:var(--text-muted);max-width:52ch;font-size:17px;}
  button{font-family:inherit;}

  /* ---------- Age & research-use gate ---------- */
  .age-gate{
    position:fixed;inset:0;z-index:500;background:var(--bg);
    display:flex;align-items:center;justify-content:center;padding:24px;
  }
  .age-card{
    max-width:460px;width:100%;background:var(--surface);border:1px solid var(--border-strong);
    border-radius:8px;padding:36px;display:flex;flex-direction:column;gap:18px;
  }
  .age-card .logo{margin-bottom:2px;}
  .age-card h2{font-size:24px;margin-top:6px;}
  .age-card p.lede{font-size:14px;max-width:none;}
  .age-checks{display:flex;flex-direction:column;gap:12px;margin-top:4px;}
  .age-check{display:flex;align-items:flex-start;gap:10px;}
  .age-check input{width:18px;height:18px;margin-top:2px;accent-color:var(--accent);flex-shrink:0;}
  .age-check label{font-size:13.5px;color:var(--text-muted);line-height:1.5;}
  .age-actions{display:flex;gap:12px;margin-top:6px;flex-wrap:wrap;}
  .age-actions .btn-primary:disabled{opacity:0.4;cursor:not-allowed;transform:none;}
  .age-note{font-size:11px;color:var(--text-muted);border-top:1px solid var(--border);padding-top:14px;}

  /* ---------- Announcement bar ---------- */
  .bar{
    background:#000000;
    color:rgba(255,255,255,0.65);
    font-family:var(--font-mono);
    font-size:12.5px;
    letter-spacing:0.03em;
    border-bottom:1px solid var(--border);
  }
  .bar .wrap{
    display:flex;justify-content:space-between;align-items:center;
    padding:9px 24px;gap:16px;flex-wrap:wrap;
  }
  .bar strong{color:#ffffff;font-weight:600;}
  .bar a{color:#ffffff;text-decoration:underline;text-underline-offset:2px;font-weight:600;}

  /* ---------- Header ---------- */
  header.site{
    position:sticky;top:0;z-index:50;
    background:var(--bg);
    border-bottom:1px solid var(--border);
  }
  .nav{
    display:flex;align-items:center;justify-content:space-between;
    padding:16px 24px;gap:24px;
  }
  .logo{
    display:flex;align-items:baseline;gap:10px;
    font-family:var(--font-display);
    font-weight:900;
    font-size:28px;
    letter-spacing:0.01em;
    text-decoration:none;
    white-space:nowrap;
  }
  .logo .mark{
    color:var(--accent-ink);
    background:var(--accent-fill);
    padding:2px 7px 0;
    border-radius:2px;
  }
  .logo .tag{
    font-family:var(--font-mono);
    font-size:10px;
    letter-spacing:0.16em;
    color:var(--text-muted);
    text-transform:uppercase;
    font-weight:400;
  }
  nav.primary{display:flex;gap:22px;flex:1;justify-content:center;}
  nav.primary a{
    font-size:13.5px;font-weight:600;text-decoration:none;color:var(--text);
    text-transform:uppercase;letter-spacing:0.02em;
    padding:6px 0;border-bottom:2px solid transparent;
    white-space:nowrap;
  }
  nav.primary a:hover, nav.primary a:focus-visible{border-color:var(--accent);}
  .nav-actions{display:flex;align-items:center;gap:16px;}
  .icon-btn{
    background:none;border:1px solid var(--border-strong);border-radius:2px;
    width:38px;height:38px;display:flex;align-items:center;justify-content:center;
    cursor:pointer;color:var(--text);flex-shrink:0;
  }
  .icon-btn:hover{border-color:var(--accent);color:var(--accent);}
  .menu-toggle{display:none;}

  :is(a,button,input,select):focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

  /* ---------- Hero ---------- */
  .hero{
    padding:64px 0 56px;
    border-bottom:1px solid var(--border);
  }
  .hero .wrap{
    display:grid;grid-template-columns:1.1fr 0.9fr;gap:56px;align-items:center;
  }
  .hero h1{font-size:clamp(38px,5vw,64px);}
  .hero h1 .accent-line{color:var(--accent);}
  .hero-copy{display:flex;flex-direction:column;gap:20px;align-items:flex-start;}
  .cta-row{display:flex;gap:14px;margin-top:4px;flex-wrap:wrap;}
  .btn{
    display:inline-flex;align-items:center;gap:8px;
    font-size:14px;font-weight:700;text-transform:uppercase;letter-spacing:0.04em;
    padding:13px 24px;border-radius:2px;text-decoration:none;cursor:pointer;border:1px solid transparent;
    transition:transform .15s ease;
  }
  .btn:hover{transform:translateY(-1px);}
  .btn-primary{background:var(--accent-fill);color:var(--accent-ink);}
  .btn-ghost{background:transparent;color:var(--text);border-color:var(--border-strong);}
  .btn-ghost:hover{border-color:var(--accent);color:var(--accent);}

  .hero-visual{position:relative;}
  .scope{
    background:var(--surface);
    border:1px solid var(--border);
    border-radius:4px;
    padding:20px 20px 8px;
  }
  .scope-head{
    display:flex;justify-content:space-between;align-items:center;
    font-family:var(--font-mono);font-size:11px;letter-spacing:0.08em;
    color:var(--text-muted);text-transform:uppercase;margin-bottom:6px;
    gap: 10px;
  }
  .scope-head .live{color:var(--accent);}
  .dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-right:6px;animation:pulse 1.6s ease-in-out infinite;}
  @keyframes pulse{0%,100%{opacity:1;}50%{opacity:.35;}}
  svg.wave{width:100%;height:auto;display:block;}
  .wave-line{fill:none;stroke:var(--accent);stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round;}
  .wave-grid{stroke:var(--border);stroke-width:1;}
  .wave-axis{font-family:var(--font-mono);font-size:8px;fill:var(--text-muted);}

  .spec-float{
    margin-top:-34px;
    margin-left:24px;
    margin-right:24px;
    position:relative;
    background:var(--bg);
    border:1px solid var(--border-strong);
    border-radius:4px;
    padding:16px 18px;
    display:grid;grid-template-columns:repeat(4,1fr);gap:14px;
    font-family:var(--font-mono);
  }
  .spec-float .spec{display:flex;flex-direction:column;gap:2px;}
  .spec-float .spec .v{font-size:18px;font-weight:600;font-variant-numeric:tabular-nums;}
  .spec-float .spec .k{font-size:10px;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.06em;}

  /* ---------- Trust strip ---------- */
  .trust{padding:48px 0;border-bottom:1px solid var(--border);}
  .trust .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;}
  .trust-item{display:flex;gap:14px;}
  .trust-item .num{font-family:var(--font-mono);font-size:13px;color:var(--accent);flex-shrink:0;padding-top:2px;}
  .trust-item h3{font-family:var(--font-body);font-size:15px;font-weight:700;text-transform:none;margin-bottom:6px;}
  .trust-item p{color:var(--text-muted);font-size:14px;}

  /* ---------- Section heading ---------- */
  .section{padding:64px 0;border-bottom:1px solid var(--border);}
  .section, #reconstitution-calculator{scroll-margin-top:88px;}
  .section-head{
    display:flex;justify-content:space-between;align-items:flex-end;gap:24px;
    margin-bottom:36px;flex-wrap:wrap;
  }
  .section-head h2{font-size:clamp(28px,3.4vw,40px);}

  /* ---------- Category tiles ---------- */
  .cats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
  .cat{
    position:relative;border:1px solid var(--border);border-radius:4px;
    padding:24px 20px;background:var(--surface);overflow:hidden;
    text-decoration:none;color:var(--text);
    min-height:150px;display:flex;flex-direction:column;justify-content:flex-end;gap:6px;
    transition:border-color .15s ease;
  }
  .cat:hover{border-color:var(--accent);}
  .cat .cat-index{
    position:absolute;top:16px;right:18px;
    font-family:var(--font-mono);font-size:12px;color:var(--text-muted);
  }
  .cat h3{font-size:22px;}
  .cat span.desc{font-size:12.5px;color:var(--text-muted);font-family:var(--font-body);text-transform:none;font-weight:400;}
  .cat .go{
    font-family:var(--font-mono);font-size:11.5px;letter-spacing:0.06em;color:var(--accent);
    text-transform:uppercase;margin-top:4px;
  }

  /* ---------- Filter row ---------- */
  .filters{display:flex;gap:10px;flex-wrap:wrap;}
  .chip{
    font-family:var(--font-mono);font-size:12px;text-transform:uppercase;letter-spacing:0.04em;
    border:1px solid var(--border-strong);background:transparent;color:var(--text-muted);
    padding:8px 14px;border-radius:999px;cursor:pointer;
  }
  .chip.active{border-color:var(--accent);color:var(--accent);}
  .chip:hover{border-color:var(--accent);color:var(--accent);}

  /* ---------- Product grid ---------- */
  .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:32px;}
  .card{
    border:1px solid var(--border);border-radius:4px;background:var(--surface);
    display:flex;flex-direction:column;overflow:hidden;
  }
  .card-top{
    padding:16px 16px 0;display:flex;justify-content:space-between;align-items:flex-start;
    font-family:var(--font-mono);font-size:11px;color:var(--text-muted);text-transform:uppercase;
  }
  .card-top .sale{color:var(--caution);}
  .card-top .low-stock{color:var(--caution);}
  .modal-specs .low-stock strong{color:var(--caution);}
  .card-swatch{
    margin:12px 16px 0;height:96px;border-radius:3px;
    background:
      repeating-linear-gradient(135deg, var(--accent-fill) 0 2px, transparent 2px 14px),
      var(--surface-2);
    display:flex;align-items:center;justify-content:center;
    font-family:var(--font-display);font-weight:800;font-size:15px;color:var(--text-muted);
    letter-spacing:0.02em;text-align:center;
  }
  .card-body{padding:14px 16px 18px;display:flex;flex-direction:column;gap:6px;flex:1;}
  .card-cat{font-family:var(--font-mono);font-size:10px;letter-spacing:0.08em;color:var(--accent);text-transform:uppercase;}
  .card-name{font-family:var(--font-body);font-weight:700;font-size:15px;line-height:1.3;}
  .card-spec{font-family:var(--font-mono);font-size:11.5px;color:var(--text-muted);}
  .card-foot{display:flex;justify-content:space-between;align-items:center;margin-top:auto;padding-top:10px;}
  .price{font-family:var(--font-mono);font-weight:600;font-size:15px;}
  .price .was{color:var(--text-muted);text-decoration:line-through;font-weight:400;font-size:13px;margin-right:6px;}
  .add-btn{
    border:1px solid var(--border-strong);background:transparent;color:var(--text);
    width:34px;height:34px;border-radius:2px;cursor:pointer;font-size:18px;line-height:1;
  }
  .add-btn:hover{border-color:var(--accent);color:var(--accent);}

  /* ---------- Interaction checker ---------- */
  .interact{
    background:var(--surface);border:1px solid var(--border);border-radius:6px;
    display:grid;grid-template-columns:0.8fr 1.2fr;overflow:hidden;
  }
  .interact-left{padding:28px;border-right:1px solid var(--border);}
  .interact-left .eyebrow{display:block;margin-bottom:8px;}
  .pick-list{margin-top:16px;display:flex;flex-direction:column;max-height:480px;overflow-y:auto;padding-right:6px;}
  .pick-item{
    display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px solid var(--border);
  }
  .pick-item:last-child{border-bottom:none;}
  .pick-item input[type="checkbox"]{width:18px;height:18px;accent-color:var(--accent);flex-shrink:0;}
  .pick-item label{flex:1;font-size:13.5px;font-weight:600;cursor:pointer;}
  .pick-item .tag{font-family:var(--font-mono);font-size:10px;color:var(--text-muted);text-transform:uppercase;white-space:nowrap;}
  .interact-right{padding:28px;background:var(--bg);display:flex;flex-direction:column;gap:14px;min-height:100%;}
  .notice-list{display:flex;flex-direction:column;gap:12px;max-height:420px;overflow-y:auto;padding-right:4px;}
  .notice{
    border:1px solid var(--border-strong);border-left:3px solid var(--border-strong);
    border-radius:3px;padding:14px 16px;background:var(--surface);
  }
  .notice .level{
    font-family:var(--font-mono);font-size:10.5px;letter-spacing:0.08em;text-transform:uppercase;
    display:block;margin-bottom:6px;font-weight:600;
  }
  .notice .pair{font-weight:700;font-size:14px;margin-bottom:4px;display:block;}
  .notice p{color:var(--text-muted);font-size:13.5px;}
  .notice.caution{border-left-color:var(--caution);}
  .notice.caution .level{color:var(--caution);}
  .notice.synergy{border-left-color:var(--synergy);}
  .notice.synergy .level{color:var(--synergy);}
  .notice.limited{border-left-color:var(--text-muted);}
  .notice.limited .level{color:var(--text-muted);}
  .notice-empty{
    font-family:var(--font-mono);font-size:13px;color:var(--text-muted);
    border:1px dashed var(--border-strong);border-radius:4px;padding:20px;text-align:center;
  }
  .fine-print{font-size:12px;color:var(--text-muted);border-top:1px solid var(--border);padding-top:14px;margin-top:auto;}

  /* ---------- Reconstitution calculator ---------- */
  .recon{
    background:var(--surface);border:1px solid var(--border);border-radius:6px;
    padding:32px;margin-top:24px;
  }
  .recon-top{display:grid;grid-template-columns:0.85fr 1.15fr;gap:32px;}
  .recon-form{display:flex;flex-direction:column;gap:16px;}
  .field label{display:block;font-family:var(--font-mono);font-size:11px;letter-spacing:0.05em;text-transform:uppercase;color:var(--text-muted);margin-bottom:6px;}
  .field select, .field input[type="number"]{
    width:100%;background:var(--bg);border:1px solid var(--border-strong);border-radius:2px;
    padding:11px 12px;color:var(--text);font-family:var(--font-body);font-size:14px;font-weight:600;
  }
  .field select:focus, .field input:focus{border-color:var(--accent);}
  .field-note{font-size:11.5px;color:var(--text-muted);margin-top:4px;}

  .recon-visuals{display:flex;gap:28px;align-items:flex-end;background:var(--bg);border:1px solid var(--border);border-radius:4px;padding:20px;}
  .vial-visual{flex-shrink:0;width:76px;text-align:center;}
  .vial-visual svg{width:100%;height:auto;}
  .syringe-visual{flex:1;min-width:0;}
  .syringe-visual svg{width:100%;height:auto;display:block;}
  .visual-label{font-family:var(--font-mono);font-size:11px;color:var(--text-muted);margin-top:8px;}
  .visual-label strong{color:var(--text);font-weight:600;}
  .syringe-overflow{font-family:var(--font-mono);font-size:11.5px;color:var(--caution);margin-top:8px;display:none;}
  .syringe-overflow.show{display:block;}
  .vial-overflow{font-family:var(--font-mono);font-size:11px;color:var(--caution);margin-top:8px;display:none;}
  .vial-overflow.show{display:block;}

  .recon-results{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:20px;}
  .recon-tile{border:1px solid var(--border);border-radius:4px;padding:14px 16px;}
  .recon-tile .v{font-family:var(--font-mono);font-size:22px;font-weight:600;font-variant-numeric:tabular-nums;color:var(--accent);}
  .recon-tile .k{font-family:var(--font-mono);font-size:10px;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.05em;margin-top:2px;}
  .recon-note{font-size:12px;color:var(--text-muted);margin-top:16px;}

  /* ---------- Product modal ---------- */
  .scrim{
    position:fixed;inset:0;background:rgba(3,4,1,0.72);
    display:flex;align-items:center;justify-content:center;padding:24px;
    z-index:200;opacity:0;pointer-events:none;transition:opacity .15s ease;
  }
  .scrim.open{opacity:1;pointer-events:auto;}
  .modal{
    background:var(--surface);border:1px solid var(--border-strong);border-radius:8px;
    max-width:760px;width:100%;max-height:88vh;overflow-y:auto;
    display:grid;grid-template-columns:0.85fr 1.15fr;
  }
  .modal.single{grid-template-columns:1fr;max-width:600px;}
  .modal.single .coa-cert{position:relative;}
  .modal-visual{padding:28px;border-right:1px solid var(--border);display:flex;flex-direction:column;gap:16px;background:var(--bg);}
  .modal-swatch{
    height:180px;border-radius:4px;
    background:repeating-linear-gradient(135deg, var(--accent-fill) 0 2px, transparent 2px 14px), var(--surface-2);
    display:flex;align-items:center;justify-content:center;
    font-family:var(--font-display);font-weight:800;font-size:18px;color:var(--text-muted);
  }
  .modal-specs{display:grid;grid-template-columns:1fr 1fr;gap:10px;font-family:var(--font-mono);font-size:11.5px;}
  .modal-specs div{border:1px solid var(--border);border-radius:3px;padding:8px 10px;color:var(--text-muted);}
  .modal-specs strong{display:block;color:var(--text);font-size:14px;margin-bottom:2px;}
  .modal-body{padding:28px;display:flex;flex-direction:column;gap:16px;position:relative;min-width:0;}
  .modal-close{
    position:absolute;top:20px;right:20px;background:none;border:1px solid var(--border-strong);
    border-radius:2px;width:32px;height:32px;cursor:pointer;color:var(--text-muted);font-size:16px;line-height:1;
  }
  .modal-close:hover{border-color:var(--accent);color:var(--accent);}
  .modal-cat{font-family:var(--font-mono);font-size:11px;letter-spacing:0.08em;text-transform:uppercase;color:var(--accent);}
  .modal-name{font-size:clamp(26px,3vw,32px);}
  .modal-price{font-family:var(--font-mono);font-size:20px;font-weight:600;}
  .modal-price .was{color:var(--text-muted);text-decoration:line-through;font-weight:400;font-size:15px;margin-right:8px;}
  .modal-desc{color:var(--text-muted);font-size:14.5px;line-height:1.6;max-width:52ch;}
  .modal-actions{display:flex;align-items:center;gap:14px;margin-top:auto;padding-top:8px;flex-wrap:wrap;}
  .qty-stepper{display:flex;align-items:center;border:1px solid var(--border-strong);border-radius:2px;}
  .qty-stepper button{background:none;border:none;color:var(--text);width:34px;height:38px;cursor:pointer;font-size:16px;}
  .qty-stepper button:hover{color:var(--accent);}
  .qty-stepper span{width:32px;text-align:center;font-family:var(--font-mono);font-weight:600;}
  .modal-note{font-size:11.5px;color:var(--text-muted);}
  .modal-paired{border-top:1px solid var(--border);padding-top:16px;margin-top:4px;display:flex;flex-direction:column;gap:10px;}
  .modal-paired-label{font-family:var(--font-mono);font-size:11px;letter-spacing:0.06em;text-transform:uppercase;color:var(--accent);}
  .paired-item{
    display:flex;align-items:center;gap:12px;border:1px solid var(--border);border-radius:4px;
    padding:10px 12px;cursor:pointer;transition:border-color .15s ease;
  }
  .paired-item:hover{border-color:var(--accent);}
  .paired-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px;}
  .paired-name{font-weight:700;font-size:13.5px;}
  .paired-why{font-size:11.5px;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .paired-price{font-family:var(--font-mono);font-size:12px;color:var(--text-muted);}
  .paired-add{padding:8px 14px;font-size:11.5px;flex-shrink:0;}
  .toast{
    position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(12px);
    background:var(--accent-fill);color:var(--accent-ink);font-family:var(--font-mono);font-size:13px;font-weight:600;
    padding:12px 20px;border-radius:4px;z-index:300;opacity:0;pointer-events:none;transition:all .2s ease;
  }
  .toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

  /* ---------- Cart drawer ---------- */
  .cart-scrim{position:fixed;inset:0;background:rgba(3,4,1,0.6);z-index:210;opacity:0;pointer-events:none;transition:opacity .15s ease;}
  .cart-scrim.open{opacity:1;pointer-events:auto;}
  .cart-drawer{
    position:fixed;top:0;right:0;bottom:0;width:380px;max-width:92vw;
    background:var(--surface);border-left:1px solid var(--border-strong);
    z-index:211;transform:translateX(100%);transition:transform .2s ease;
    display:flex;flex-direction:column;
  }
  .cart-drawer.open{transform:translateX(0);}
  .cart-head{display:flex;justify-content:space-between;align-items:center;padding:20px;border-bottom:1px solid var(--border);}
  .cart-head h3{font-size:20px;}
  .cart-caution-list{padding:0 20px;display:flex;flex-direction:column;gap:10px;}
  .cart-caution-list:not(:empty){padding-top:16px;}
  .cart-caution{
    border:1px solid var(--caution);border-left:3px solid var(--caution);border-radius:3px;
    background:var(--surface);padding:11px 13px;
  }
  .cart-caution .level{
    font-family:var(--font-mono);font-size:10px;letter-spacing:0.06em;text-transform:uppercase;
    color:var(--caution);font-weight:600;display:block;margin-bottom:4px;
  }
  .cart-caution .pair{font-weight:700;font-size:12.5px;display:block;margin-bottom:3px;}
  .cart-caution p{color:var(--text-muted);font-size:12px;line-height:1.5;}
  .cart-items{flex:1;overflow-y:auto;padding:12px 20px;}
  .cart-line{display:flex;gap:12px;padding:14px 0;border-bottom:1px solid var(--border);align-items:center;}
  .cart-line-name{flex:1;font-size:13.5px;font-weight:600;}
  .cart-line-cat{font-family:var(--font-mono);font-size:10px;color:var(--text-muted);text-transform:uppercase;}
  .cart-line-price{font-family:var(--font-mono);font-size:13px;white-space:nowrap;}
  .cart-line .qty-stepper button{width:26px;height:28px;font-size:13px;}
  .cart-line .qty-stepper span{width:22px;font-size:12px;}
  .cart-remove{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:16px;padding:0 4px;}
  .cart-remove:hover{color:var(--caution);}
  .cart-empty{color:var(--text-muted);font-size:13.5px;text-align:center;padding:40px 20px;font-family:var(--font-mono);}
  .cart-foot{padding:20px;border-top:1px solid var(--border);}
  .cart-subtotal{display:flex;justify-content:space-between;font-family:var(--font-mono);font-size:16px;font-weight:600;margin-bottom:14px;}
  .cart-checkout-note{font-size:11.5px;color:var(--text-muted);margin-top:10px;display:none;}
  .cart-checkout-note.show{display:block;}

  /* ---------- Checkout ---------- */
  .modal.checkout{grid-template-columns:1fr 1.3fr;max-width:920px;}
  .modal.checkout.success{grid-template-columns:1fr;max-width:520px;}
  .checkout-summary{padding:28px;border-right:1px solid var(--border);background:var(--bg);display:flex;flex-direction:column;gap:4px;position:relative;}
  .checkout-summary h3{font-size:13px;text-transform:uppercase;letter-spacing:0.06em;color:var(--accent);margin-bottom:10px;}
  .checkout-line{display:flex;justify-content:space-between;gap:12px;font-size:13px;padding:9px 0;border-bottom:1px solid var(--border);}
  .checkout-line .name{font-weight:600;}
  .checkout-line .qty{color:var(--text-muted);font-family:var(--font-mono);font-size:11px;margin-top:2px;}
  .checkout-total-row{display:flex;justify-content:space-between;font-family:var(--font-mono);font-weight:600;font-size:16px;padding-top:14px;margin-top:4px;border-top:1px solid var(--border-strong);}
  .checkout-form{padding:28px;display:flex;flex-direction:column;gap:18px;position:relative;}
  .checkout-form h3{font-size:13px;text-transform:uppercase;letter-spacing:0.06em;color:var(--accent);}
  .checkout-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
  .field input[type="text"], .field input[type="email"]{
    width:100%;background:var(--bg);border:1px solid var(--border-strong);border-radius:2px;
    padding:11px 12px;color:var(--text);font-family:var(--font-body);font-size:14px;font-weight:600;
  }
  .checkout-radio-group{display:flex;flex-direction:column;gap:8px;}
  .checkout-radio{display:flex;align-items:center;gap:10px;border:1px solid var(--border-strong);border-radius:3px;padding:10px 12px;cursor:pointer;font-size:13px;}
  .checkout-radio input{accent-color:var(--accent);flex-shrink:0;}
  .checkout-radio.checked{border-color:var(--accent);color:var(--accent);}
  .checkout-success{display:flex;flex-direction:column;align-items:flex-start;gap:14px;}
  .checkout-success h2{font-size:26px;}

  /* ---------- Design customizer ---------- */
  .customizer-toggle{
    position:fixed;bottom:24px;right:24px;z-index:150;
    background:var(--surface);border:1px solid var(--border-strong);color:var(--text);
    width:48px;height:48px;border-radius:50%;cursor:pointer;font-size:19px;
    display:none;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(0,0,0,0.4);
  }
  .customizer-toggle.enabled{display:flex;}
  .customizer-toggle:hover{border-color:var(--accent);color:var(--accent);}
  .customizer-panel{
    position:fixed;bottom:84px;right:24px;z-index:151;width:260px;
    background:var(--surface);border:1px solid var(--border-strong);border-radius:8px;
    padding:20px;display:none;box-shadow:0 8px 28px rgba(0,0,0,0.5);
  }
  .customizer-panel.open{display:block;}
  .customizer-panel h4{font-size:13px;text-transform:uppercase;letter-spacing:0.05em;margin-bottom:4px;}
  .customizer-sub{font-size:11.5px;color:var(--text-muted);margin-bottom:16px;}
  .customizer-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
  .customizer-row label{font-family:var(--font-mono);font-size:11.5px;color:var(--text-muted);}
  .customizer-row input[type="color"]{
    width:34px;height:26px;border:1px solid var(--border-strong);border-radius:3px;background:none;cursor:pointer;padding:0;
  }
  .customizer-reset{
    width:100%;margin-top:6px;background:none;border:1px solid var(--border-strong);color:var(--text-muted);
    padding:9px;border-radius:2px;cursor:pointer;font-family:var(--font-mono);font-size:11.5px;text-transform:uppercase;
  }
  .customizer-reset:hover{border-color:var(--accent);color:var(--accent);}

  /* ---------- COA library ---------- */
  .coa-table{width:100%;border-collapse:collapse;margin-top:8px;}
  .coa-table th{
    text-align:left;font-family:var(--font-mono);font-size:10.5px;text-transform:uppercase;letter-spacing:0.05em;
    color:var(--text-muted);padding:0 14px 10px;border-bottom:1px solid var(--border-strong);font-weight:600;
  }
  .coa-table td{padding:14px;border-bottom:1px solid var(--border);font-size:13.5px;vertical-align:middle;}
  .coa-table tr:last-child td{border-bottom:none;}
  .coa-compound{font-weight:700;}
  .coa-mono{font-family:var(--font-mono);font-size:12.5px;color:var(--text-muted);}
  .coa-view{
    font-family:var(--font-mono);font-size:11.5px;text-transform:uppercase;letter-spacing:0.04em;
    background:none;border:1px solid var(--border-strong);color:var(--accent);
    padding:7px 12px;border-radius:2px;cursor:pointer;white-space:nowrap;
  }
  .coa-view:hover{border-color:var(--accent);}
  .coa-table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:6px;background:var(--surface);padding:8px;}
  .coa-cert{
    background:var(--bg);border:1px solid var(--border-strong);border-radius:6px;padding:28px;
    display:flex;flex-direction:column;gap:16px;
  }
  .coa-cert-head{display:flex;justify-content:space-between;align-items:baseline;border-bottom:1px solid var(--border);padding-bottom:14px;}
  .coa-cert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;font-family:var(--font-mono);font-size:12px;}
  .coa-cert-grid div{border:1px solid var(--border);border-radius:3px;padding:10px 12px;}
  .coa-cert-grid strong{display:block;color:var(--text);font-size:16px;}
  .coa-cert-note{font-size:11.5px;color:var(--text-muted);}

  @media (max-width:900px){
    .modal{grid-template-columns:1fr;}
    .modal.checkout{grid-template-columns:1fr;}
    .modal-visual{border-right:none;border-bottom:1px solid var(--border);}
    .checkout-summary{border-right:none;border-bottom:1px solid var(--border);}
    .checkout-grid-2{grid-template-columns:1fr;}
    .coa-cert-grid{grid-template-columns:1fr 1fr;}
  }

  /* ---------- About ---------- */
  .about .wrap{display:grid;grid-template-columns:0.9fr 1.1fr;gap:56px;align-items:start;}
  .about-copy p + p{margin-top:14px;}
  .about-copy{color:var(--text-muted);font-size:16px;max-width:56ch;}
  .about-figures{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
  .fig{border:1px solid var(--border);border-radius:4px;padding:18px;}
  .fig .v{font-family:var(--font-display);font-size:34px;font-weight:800;color:var(--accent);}
  .fig .k{font-family:var(--font-mono);font-size:11px;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.05em;margin-top:2px;}

  /* ---------- Footer ---------- */
  footer{padding:56px 0 28px;}
  .foot-grid{display:grid;grid-template-columns:1.4fr 0.8fr 0.8fr 1.1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid var(--border);}
  .foot-brand .logo{margin-bottom:12px;}
  .foot-brand p{color:var(--text-muted);font-size:13.5px;max-width:32ch;}
  .foot-col h4{font-size:12px;text-transform:uppercase;letter-spacing:0.08em;color:var(--text-muted);margin-bottom:14px;font-weight:600;}
  .foot-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;}
  .foot-col a{font-size:14px;text-decoration:none;}
  .foot-col a:hover{color:var(--accent);}
  .foot-sub{display:flex;gap:10px;margin-top:10px;}
  .foot-sub input{
    flex:1;background:var(--surface);border:1px solid var(--border-strong);border-radius:2px;
    padding:10px 12px;color:var(--text);font-family:var(--font-body);font-size:13.5px;
  }
  .foot-bottom{display:flex;justify-content:space-between;padding-top:22px;font-size:12.5px;color:var(--text-muted);font-family:var(--font-mono);flex-wrap:wrap;gap:10px;}

  @media (max-width:900px){
    nav.primary, .nav-actions .icon-btn:first-of-type{display:none;}
    .menu-toggle{display:flex;}
    .hero .wrap, .about .wrap, .interact, .recon-top{grid-template-columns:1fr;}
    .interact-left{border-right:none;border-bottom:1px solid var(--border);}
    .cats{grid-template-columns:1fr 1fr;}
    .grid{grid-template-columns:repeat(2,1fr);}
    .trust .wrap{grid-template-columns:1fr;gap:24px;}
    .foot-grid{grid-template-columns:1fr 1fr;}
    .spec-float{grid-template-columns:repeat(2,1fr);}
    .recon-results{grid-template-columns:1fr 1fr;}
    .recon-visuals{flex-direction:column;align-items:stretch;}
  }
  @media (prefers-reduced-motion: reduce){
    .dot{animation:none;}
  }