/* ============================================================================
   A&A PPTDS — Design System v2
   Premium biotechnology / laboratory aesthetic: clean white base, deep navy
   contrast sections, electric blue accents. Zero external dependencies:
   system font stack only (no Google Fonts — network-restricted build env).
   ============================================================================ */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body { min-height: 100dvh; line-height: 1.6; -webkit-font-smoothing: antialiased; }
img, picture, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
table { border-collapse: collapse; width: 100%; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.18; text-wrap: balance; }
p { text-wrap: pretty; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ---------- 2. Design tokens ---------- */
:root {
  /* Surfaces — clean base, blended teal-green + blue instead of flat white */
  --bg: #F2FAF8;
  --bg-alt: #E9F5F0;
  --bg-elevated: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F2FBF8;
  --border: #DFEDE8;
  --border-strong: #C7DDD5;

  /* Deep navy — used for contrast sections (hero, gate, quality, footer) */
  --navy: #0A1830;
  --navy-2: #0F2549;
  --navy-3: #16305E;
  --navy-card: rgba(255,255,255,0.055);
  --navy-card-hover: rgba(255,255,255,0.09);
  --navy-border: rgba(255,255,255,0.14);
  --navy-border-strong: rgba(255,255,255,0.22);
  --navy-text: #F4F8FD;
  --navy-text-muted: #AFC1DC;
  --navy-text-dim: #7E93B8;

  /* Text (on light bg) */
  --text: #0E1B32;
  --text-muted: #4B5A72;
  --text-dim: #6B7C95;

  /* Accents — electric / bright blue family */
  --accent: #2563EB;
  --accent-2: #1D4ED8;
  --accent-light: #5B9CF6;
  --accent-soft: rgba(37,99,235,0.08);
  --accent-soft-strong: rgba(37,99,235,0.14);
  --gradient: linear-gradient(135deg, #3B82F6 0%, #1D4ED8 100%);
  --gradient-soft: linear-gradient(135deg, rgba(37,99,235,0.10) 0%, rgba(29,78,216,0.05) 100%);
  --gradient-navy: linear-gradient(160deg, #0A1830 0%, #16305E 100%);
  --gradient-text: linear-gradient(135deg, #3B82F6 0%, #60A5FA 55%, #93C5FD 100%);

  /* Teal-green — blended alongside blue as a second primary accent (page
     surfaces, category/quick-link variety, featured badge, hero glow) */
  --teal: #0D9F94;
  --teal-2: #0B8377;
  --teal-light: #5EEAD4;
  --teal-soft: rgba(13,159,148,0.10);
  --teal-soft-strong: rgba(13,159,148,0.16);
  --gradient-teal: linear-gradient(135deg, #2DD4BF 0%, #0B8377 100%);
  --gradient-teal-blue: linear-gradient(135deg, #14B8A6 0%, #2563EB 100%);

  /* Secondary accents — used sparingly (category icon variety, popular picks) */
  --accent-gold: #C8862B;
  --accent-gold-2: #E0A845;
  --gradient-gold: linear-gradient(135deg, #E0A845 0%, #C8862B 100%);
  --accent-violet: #7C6AE8;
  --accent-violet-2: #6152C4;
  --gradient-violet: linear-gradient(135deg, #8B7CF0 0%, #6152C4 100%);

  /* Status */
  --success: #0F9D66;
  --warning: #B45309;
  --warning-bg: rgba(217,119,6,0.1);
  --danger: #DC2626;
  --pending: #7A8CA8;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;

  /* Radii / shadows */
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-card: 0 1px 2px rgba(15,23,42,0.04), 0 16px 32px -20px rgba(15,35,70,0.16);
  --shadow-card-lg: 0 4px 8px rgba(15,23,42,0.03), 0 30px 60px -24px rgba(15,35,70,0.20);
  --shadow-glow: 0 0 0 1px rgba(37,99,235,0.16), 0 12px 32px -8px rgba(37,99,235,0.28);
  --shadow-navy: 0 30px 60px -20px rgba(3,10,25,0.55);

  /* Layout */
  --container: 1240px;
  --header-h: 116px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
}

::selection { background: var(--accent-soft-strong); color: var(--text); }

/* Subtle global backdrop: blue + teal-green glows blended together, plus a
   faint dot grid, kept very light so body text stays crisp */
body {
  background-image:
    radial-gradient(1100px 600px at 88% -8%, rgba(37,99,235,0.08), transparent 60%),
    radial-gradient(900px 560px at -6% 10%, rgba(13,159,148,0.09), transparent 58%),
    radial-gradient(800px 500px at 50% 110%, rgba(96,165,250,0.06), transparent 55%),
    radial-gradient(circle, rgba(15,35,70,0.05) 1px, transparent 1px);
  background-size: auto, auto, auto, 26px 26px;
  background-attachment: fixed, fixed, fixed, fixed;
}

/* ---------- 3. Layout helpers ---------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 20px; }
@media (min-width: 768px) { .container { padding-inline: 32px; } }

.section { padding-block: 64px; }
@media (min-width: 900px) { .section { padding-block: 96px; } }
.section--tight { padding-block: 40px; }
.section--alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* Deep-navy contrast section: used for hero, quality/documentation, mid CTA */
.section--navy {
  position: relative; background: var(--gradient-navy); color: var(--navy-text); overflow: hidden;
}
.section--navy h1, .section--navy h2, .section--navy h3 { color: var(--navy-text); }
.section--navy p { color: var(--navy-text-muted); }
.section--navy .eyebrow { color: #8FC2FF; }
.section--navy .eyebrow::before { background: #8FC2FF; }

.grid-2 { display: grid; gap: 24px; grid-template-columns: 1fr; }
.grid-3 { display: grid; gap: 24px; grid-template-columns: 1fr; }
.grid-4 { display: grid; gap: 20px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } .grid-4 { grid-template-columns: repeat(4, 1fr); } }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 12px; top: -60px; background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 8px; font-weight: 600; z-index: 200; transition: top .2s ease; }
.skip-link:focus { top: 12px; }

/* ---------- 4. Typography ---------- */
h1 { font-size: clamp(2.2rem, 4.4vw, 3.6rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.65rem, 3vw, 2.4rem); letter-spacing: -0.015em; }
h3 { font-size: 1.2rem; }
.lead { font-size: 1.125rem; color: var(--text-muted); }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 18px; height: 1px; background: var(--accent); }
.mono { font-family: var(--font-mono); font-size: 0.92em; }
.text-gradient { background: var(--gradient-text); -webkit-background-clip: text; background-clip: text; color: transparent; }

.section-heading { max-width: 680px; margin-bottom: 44px; }
.section-heading p { color: var(--text-muted); margin-top: 12px; font-size: 1.05rem; }
.section-heading--center { margin-inline: auto; text-align: center; }
.section-heading--center .eyebrow::before { display: none; }

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 24px; border-radius: 999px; font-weight: 600; font-size: 0.95rem;
  border: 1px solid transparent; transition: transform .15s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, opacity .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--gradient); color: #fff; box-shadow: var(--shadow-glow); }
.btn--primary:hover { filter: brightness(1.06); box-shadow: 0 0 0 1px rgba(37,99,235,0.3), 0 16px 36px -8px rgba(37,99,235,0.4); }
.btn--secondary { background: #fff; border-color: var(--border-strong); color: var(--text); box-shadow: var(--shadow-card); }
.btn--secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn--ghost { background: transparent; border-color: var(--border-strong); color: var(--text); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.btn--outline { background: transparent; border-color: var(--accent); color: var(--accent); }
.btn--danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn--sm { padding: 9px 16px; font-size: 0.85rem; }
.btn--lg { padding: 16px 30px; font-size: 1.02rem; }
.btn--block { width: 100%; }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; pointer-events: none; }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

/* On navy sections, ghost/secondary buttons need light-on-dark treatment */
.section--navy .btn--secondary { background: var(--navy-card); border-color: var(--navy-border-strong); color: var(--navy-text); box-shadow: none; backdrop-filter: blur(10px); }
.section--navy .btn--secondary:hover { border-color: #8FC2FF; color: #8FC2FF; }
.section--navy .btn--ghost { border-color: var(--navy-border-strong); color: var(--navy-text); }
.section--navy .btn--ghost:hover { border-color: #8FC2FF; color: #8FC2FF; background: rgba(143,194,255,0.08); }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 10px; color: var(--text-muted);
  border: 1px solid transparent; position: relative; transition: color .15s ease, background .15s ease, border-color .15s ease;
}
.icon-btn:hover { color: var(--accent); background: var(--accent-soft); border-color: var(--border); }

/* ---------- 6. Badges / pills / chips ---------- */
.badge { display: inline-flex; align-items: center; gap: 6px; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; padding: 5px 10px; border-radius: 999px; }
.badge--demo { background: var(--warning-bg); color: var(--warning); border: 1px solid rgba(180,83,9,0.25); }
.badge--accent { background: var(--accent-soft-strong); color: var(--accent-2); border: 1px solid rgba(37,99,235,0.24); }
.badge--muted { background: #EEF2F8; color: var(--text-muted); border: 1px solid var(--border); }
.badge--gold { background: rgba(200,134,43,0.12); color: var(--accent-gold); border: 1px solid rgba(200,134,43,0.28); }
.badge--violet { background: rgba(97,82,196,0.10); color: var(--accent-violet-2); border: 1px solid rgba(97,82,196,0.26); }
.badge--teal { background: var(--teal-soft); color: var(--teal-2); border: 1px solid rgba(13,159,148,0.28); }

.pill { position: absolute; top: 12px; left: 12px; z-index: 2; font-size: 0.68rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em; padding: 5px 10px; border-radius: 999px; background: #fff; border: 1px solid var(--border-strong); box-shadow: var(--shadow-card); }
.pill--new { color: var(--accent); border-color: rgba(37,99,235,0.3); }
.pill--sale { color: var(--warning); border-color: rgba(180,83,9,0.3); left: auto; right: 12px; top: 12px; }
.pill--new ~ .pill--sale { top: 46px; }

/* ---------- 7. Cards / glass ---------- */
.card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.card--hover:hover { border-color: rgba(37,99,235,0.28); transform: translateY(-4px); box-shadow: var(--shadow-card-lg); }
.card--padded { padding: 28px; }

/* Glass card variant for use on navy sections */
.card--glass {
  background: var(--navy-card); border: 1px solid var(--navy-border);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow-navy); color: var(--navy-text);
}
.card--glass:hover { border-color: rgba(143,194,255,0.35); background: var(--navy-card-hover); }
.card--glass p { color: var(--navy-text-muted); }

/* ---------- 8. Announcement bar + header ---------- */
.announce { background: var(--gradient-navy); border-bottom: 1px solid var(--navy-border); }
.announce__inner { max-width: var(--container); margin-inline: auto; padding: 9px 20px; display: flex; align-items: center; justify-content: center; gap: 16px; position: relative; }
.announce__text { font-size: 0.82rem; color: var(--navy-text-muted); text-align: center; }
.announce__text a { color: #8FC2FF; font-weight: 600; text-decoration: underline; text-underline-offset: 2px; }
.announce__close { position: absolute; right: 16px; top: 50%; transform: translateY(-50%); color: var(--navy-text-dim); width: 22px; height: 22px; display: inline-flex; align-items: center; justify-content: center; border-radius: 6px; }
.announce__close:hover { color: var(--navy-text); }
.announce.is-hidden { display: none; }

.site-header { position: sticky; top: 0; z-index: 100; }
.nav-bar { background: rgba(255,255,255,0.86); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
.nav-bar__inner { max-width: var(--container); margin-inline: auto; padding: 14px 20px; display: flex; align-items: center; gap: 24px; }
@media (min-width: 768px) { .nav-bar__inner { padding: 16px 32px; } }

.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand__mark { display: inline-flex; filter: drop-shadow(0 2px 6px rgba(37,99,235,0.25)); }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name { font-weight: 800; font-size: 1.05rem; letter-spacing: 0.01em; color: var(--text); }
.brand__sub { font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-dim); }

.nav { display: none; flex: 1; }
.nav__list { display: flex; align-items: center; gap: 4px; }
.nav__link { display: inline-block; padding: 9px 13px; border-radius: 8px; font-size: 0.9rem; color: var(--text-muted); font-weight: 600; transition: color .15s ease, background .15s ease; }
.nav__link:hover { color: var(--accent); background: var(--accent-soft); }
.nav__link.is-active { color: var(--accent); background: var(--accent-soft); }
@media (min-width: 1080px) { .nav { display: flex; } }

.nav-bar__actions { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.icon-btn--cart { position: relative; }
.cart-badge { position: absolute; top: 2px; right: 2px; min-width: 16px; height: 16px; padding: 0 4px; border-radius: 999px; background: var(--gradient); color: #fff; font-size: 0.62rem; font-weight: 800; display: flex; align-items: center; justify-content: center; }
.cart-badge[data-count="0"] { display: none; }
.menu-toggle { display: inline-flex; }
@media (min-width: 1080px) { .menu-toggle { display: none; } }

/* ---------- 9. Mobile nav ---------- */
.mobile-nav { position: fixed; inset: 0; z-index: 200; visibility: hidden; }
.mobile-nav.is-open { visibility: visible; }
.mobile-nav__backdrop { position: absolute; inset: 0; background: rgba(10,24,48,0.55); backdrop-filter: blur(2px); opacity: 0; transition: opacity .25s ease; }
.mobile-nav.is-open .mobile-nav__backdrop { opacity: 1; }
.mobile-nav__panel { position: absolute; top: 0; right: 0; height: 100%; width: min(360px, 88vw); background: #fff; border-left: 1px solid var(--border); padding: 20px; display: flex; flex-direction: column; gap: 20px; transform: translateX(100%); transition: transform .3s cubic-bezier(.4,0,.2,1); overflow-y: auto; box-shadow: -20px 0 50px -20px rgba(15,35,70,0.3); }
.mobile-nav.is-open .mobile-nav__panel { transform: translateX(0); }
.mobile-nav__top { display: flex; align-items: center; justify-content: space-between; }
.mobile-nav__search { display: flex; gap: 8px; background: var(--bg-alt); border: 1px solid var(--border); border-radius: 10px; padding: 6px; }
.mobile-nav__search input { flex: 1; background: transparent; border: 0; padding: 8px 10px; color: var(--text); }
.mobile-nav__search button { background: transparent; border: 0; color: var(--accent); padding: 0 6px; }
.mobile-nav__list { display: flex; flex-direction: column; gap: 2px; }
.mobile-nav__link { display: flex; align-items: center; justify-content: space-between; padding: 13px 6px; border-bottom: 1px solid var(--border); color: var(--text); font-weight: 600; }
.mobile-nav__link.is-active { color: var(--accent); }
.mobile-nav__link svg { opacity: 0.4; }
.mobile-nav__footer { margin-top: auto; display: flex; flex-direction: column; gap: 10px; }
@media (min-width: 1080px) { .mobile-nav, .menu-toggle { display: none !important; } }

/* ---------- 10. Hero ---------- */
.hero { position: relative; padding-block: 64px 72px; overflow: hidden; }
@media (min-width: 900px) { .hero { padding-block: 88px 96px; } }
.hero__bg { position: absolute; inset: 0; z-index: -1; background:
    radial-gradient(900px 560px at 18% 0%, rgba(59,130,246,0.30), transparent 60%),
    radial-gradient(760px 620px at 100% 25%, rgba(37,99,235,0.24), transparent 60%),
    radial-gradient(1000px 700px at 50% 120%, rgba(96,165,250,0.10), transparent 60%);
}
.hero__grid { position: absolute; inset: 0; z-index: -1; opacity: 0.5;
  background-image: linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 44px 44px; mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 40%, transparent 100%);
}
.hero__inner { display: grid; gap: 40px; align-items: center; }
@media (min-width: 980px) { .hero__inner { grid-template-columns: 1.05fr 0.95fr; gap: 56px; } }
.hero__copy h1 { margin-bottom: 20px; }
.hero__copy .lead { margin-bottom: 30px; max-width: 560px; }
.hero__stats { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.stat-chip { display: inline-flex; align-items: center; gap: 8px; padding: 9px 14px; border-radius: 999px; background: var(--navy-card); border: 1px solid var(--navy-border); font-size: 0.83rem; color: var(--navy-text-muted); backdrop-filter: blur(8px); }
.stat-chip svg { color: #8FC2FF; }

.hero__visual { position: relative; }
.hero__panel { border-radius: var(--radius-lg); overflow: hidden; }
.hero__panel-inner { aspect-ratio: 4/3.1; display: flex; align-items: center; justify-content: center; position: relative; background: linear-gradient(160deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02)); }
.hero__molecule { color: #8FC2FF; opacity: 0.95; filter: drop-shadow(0 0 34px rgba(96,165,250,0.5)); animation: float 7s ease-in-out infinite; }
@keyframes float { 0%,100% { transform: translateY(0px) rotate(0deg); } 50% { transform: translateY(-14px) rotate(2deg); } }
.hero__panel-badge { position: absolute; bottom: 18px; left: 18px; right: 18px; }

/* Floating peptide-chain / particle dots layered behind hero visual */
.hero__particles { position: absolute; inset: -10%; z-index: -1; pointer-events: none; }
.hero__particles circle { animation: drift 9s ease-in-out infinite; }
@keyframes drift { 0%,100% { transform: translateY(0); opacity: 0.5; } 50% { transform: translateY(-18px); opacity: 1; } }

/* ---------- 11. Product media placeholder ---------- */
.product-media { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; background: linear-gradient(160deg, #EEF4FE 0%, #F7FAFD 100%); border-radius: var(--radius) var(--radius) 0 0; aspect-ratio: 1/1; color: var(--accent); overflow: hidden; }
.product-media--detail { border-radius: var(--radius); aspect-ratio: 4/3.4; }
.product-media__art { opacity: 0.85; }
.product-media__img { display: block; width: 100%; height: 100%; object-fit: contain; padding: 14px; box-sizing: border-box; transition: transform .5s cubic-bezier(.2,.8,.2,1); cursor: pointer; }
.product-media__label { position: absolute; bottom: 10px; font-size: 0.62rem; letter-spacing: 0.06em; text-transform: uppercase; color: #fff; background: rgba(10,24,48,0.55); padding: 3px 9px; border-radius: 999px; }
.product-art { color: var(--accent); }

/* Vial spin interaction: click toggles .is-spinning, a full 360 3D-style tumble */
.product-media__img.is-spinning { animation: vialSpin 1.1s cubic-bezier(.25,.75,.35,1) 1; }
@keyframes vialSpin {
  0%   { transform: perspective(700px) rotateY(0deg) rotateX(0deg) scale(1); }
  35%  { transform: perspective(700px) rotateY(160deg) rotateX(6deg) scale(1.06); }
  65%  { transform: perspective(700px) rotateY(320deg) rotateX(-4deg) scale(1.06); }
  100% { transform: perspective(700px) rotateY(360deg) rotateX(0deg) scale(1); }
}
.product-media__img:hover { transform: perspective(700px) rotateY(-6deg) scale(1.03); }
.product-media--detail .product-media__img:hover { transform: perspective(900px) rotateY(-8deg) scale(1.02); }
@media (prefers-reduced-motion: reduce) {
  .product-media__img, .product-media__img.is-spinning, .product-media__img:hover { animation: none !important; transform: none !important; }
}

.thumb-row { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.thumb { width: 64px; height: 64px; border-radius: 10px; border: 1px solid var(--border); background: #fff; display: flex; align-items: center; justify-content: center; color: var(--text-dim); transition: border-color .15s ease; }
.thumb.is-active, .thumb:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 12. Product cards / grid ---------- */
.product-grid { display: grid; gap: 22px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.product-card { position: relative; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease; box-shadow: var(--shadow-card); }
.product-card:hover { border-color: rgba(37,99,235,0.3); transform: translateY(-5px); box-shadow: var(--shadow-card-lg); }
.product-card__media-link { position: relative; display: block; }
.product-card__body { padding: 18px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.product-card__category { font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.product-card__name { font-size: 1.02rem; font-weight: 700; }
.product-card__name a:hover { color: var(--accent); }
.product-card__size { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-dim); }
.product-card__price-row { display: flex; align-items: baseline; gap: 8px; margin-top: 4px; }
.price { font-weight: 800; font-size: 1.08rem; color: var(--text); }
.price--compare { text-decoration: line-through; color: var(--text-dim); font-weight: 500; font-size: 0.88rem; }
.product-card__actions { display: flex; gap: 8px; margin-top: 12px; }
.product-card__actions .btn { flex: 1; }

.availability { display: inline-flex; align-items: center; gap: 6px; font-size: 0.78rem; color: var(--text-muted); }
.availability__dot { width: 7px; height: 7px; border-radius: 999px; background: var(--text-dim); }
.availability--in-stock .availability__dot { background: var(--success); }
.availability--out-of-stock .availability__dot { background: var(--danger); }
.availability--backorder .availability__dot { background: var(--warning); }
.availability--pending .availability__dot { background: var(--pending); }

/* ---------- 13. Category cards ---------- */
.category-card { display: flex; flex-direction: column; gap: 14px; padding: 26px; }
.category-card__icon { width: 52px; height: 52px; border-radius: 14px; background: var(--gradient-soft); display: flex; align-items: center; justify-content: center; color: var(--accent); }
.category-card__icon--violet { background: linear-gradient(135deg, rgba(139,124,240,0.16), rgba(97,82,196,0.06)); color: var(--accent-violet-2); }
.category-card__icon--gold { background: linear-gradient(135deg, rgba(224,168,69,0.18), rgba(200,134,43,0.06)); color: var(--accent-gold); }
.category-card__icon--teal { background: linear-gradient(135deg, rgba(45,212,191,0.20), rgba(11,131,119,0.06)); color: var(--teal-2); }
.category-card h3 { font-size: 1.15rem; }
.category-card p { color: var(--text-muted); font-size: 0.92rem; }
.category-card__link { display: inline-flex; align-items: center; gap: 6px; color: var(--accent); font-weight: 700; font-size: 0.88rem; margin-top: auto; }

/* ---------- 13b. Quick links ---------- */
.quick-links { display: grid; gap: 14px; grid-template-columns: repeat(2, 1fr); }
@media (min-width: 640px) { .quick-links { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1000px) { .quick-links { grid-template-columns: repeat(6, 1fr); } }
.quick-link {
  display: flex; flex-direction: column; align-items: center; text-align: center; gap: 10px;
  padding: 22px 14px; background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-card); transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.quick-link:hover { transform: translateY(-4px); border-color: rgba(37,99,235,0.32); box-shadow: var(--shadow-card-lg); }
.quick-link__icon { width: 44px; height: 44px; border-radius: 12px; background: var(--gradient-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; }
.quick-link__icon--teal { background: linear-gradient(135deg, rgba(45,212,191,0.18), rgba(11,131,119,0.05)); color: var(--teal-2); }
.quick-link:has(.quick-link__icon--teal):hover { border-color: rgba(13,159,148,0.32); }
.quick-link__label { font-size: 0.85rem; font-weight: 700; color: var(--text); }

/* ---------- 14. Callouts / notices ---------- */
.callout { display: flex; gap: 12px; padding: 16px 18px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--bg-card); align-items: flex-start; box-shadow: var(--shadow-card); }
.callout svg { flex-shrink: 0; margin-top: 2px; color: var(--accent); }
.callout--warning { border-color: rgba(180,83,9,0.25); background: var(--warning-bg); }
.callout--warning svg { color: var(--warning); }
.callout--danger { border-color: rgba(220,38,38,0.25); background: rgba(220,38,38,0.06); }
.callout--danger svg { color: var(--danger); }
.callout p { color: var(--text-muted); font-size: 0.92rem; }
.placeholder-notice { display: inline-flex; align-items: center; gap: 6px; font-size: 0.78rem; color: var(--warning); margin-top: 8px; }

/* ---------- 15. Steps / process ---------- */
.steps { display: grid; gap: 22px; grid-template-columns: 1fr; counter-reset: step; }
@media (min-width: 800px) { .steps { grid-template-columns: repeat(4, 1fr); } }
.step { padding: 24px; position: relative; }
.step__num { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent); font-weight: 700; margin-bottom: 10px; display: block; }
.step h3 { font-size: 1.02rem; margin-bottom: 8px; }
.step p { color: var(--text-muted); font-size: 0.9rem; }

/* ---------- 16. Newsletter ---------- */
.newsletter { padding-block: 56px; border-top: 1px solid var(--border); background: var(--bg-alt); }
.newsletter__inner { display: grid; gap: 20px; align-items: center; }
@media (min-width: 860px) { .newsletter__inner { grid-template-columns: 1fr auto; } }
.newsletter__copy p { color: var(--text-muted); margin-top: 6px; }
.newsletter__form { display: flex; gap: 10px; flex-wrap: wrap; }
.newsletter__form input { min-width: 240px; flex: 1; padding: 13px 16px; border-radius: 999px; border: 1px solid var(--border-strong); background: #fff; color: var(--text); }
.newsletter__note:not(:empty) { grid-column: 1 / -1; color: var(--success); font-size: 0.88rem; }
.form-disclosure { grid-column: 1 / -1; color: var(--text-dim); font-size: 0.76rem; margin-top: 4px; }

/* ---------- 17. Footer (navy, for contrast) ---------- */
.site-footer { padding-block: 56px 28px; background: var(--gradient-navy); color: var(--navy-text); }
.site-footer a { color: var(--navy-text-muted); }
.footer__grid { display: grid; gap: 40px; grid-template-columns: 1fr; }
@media (min-width: 720px) { .footer__grid { grid-template-columns: 1.4fr repeat(2, 1fr); } }
@media (min-width: 1080px) { .footer__grid { grid-template-columns: 1.6fr repeat(5, 1fr); } }
.footer__brand { display: flex; flex-direction: column; gap: 14px; }
.footer__brand .brand__name { color: var(--navy-text); }
.footer__desc { color: var(--navy-text-muted); font-size: 0.88rem; max-width: 320px; }
.footer__shipping { display: inline-flex; align-items: center; gap: 7px; margin-top: 12px; font-size: 0.82rem; font-weight: 700; color: var(--teal-light); }
.footer__social { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; }
.footer__social a { display: inline-flex; align-items: center; gap: 8px; color: var(--navy-text-dim); font-size: 0.85rem; }
.footer__social a:hover { color: #8FC2FF; }
.footer__heading { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--navy-text-dim); margin-bottom: 16px; }
.footer__list { display: flex; flex-direction: column; gap: 11px; }
.footer__list a { color: var(--navy-text-muted); font-size: 0.9rem; }
.footer__list a:hover { color: #8FC2FF; }
.footer__disclaimer { margin-top: 44px; padding-top: 28px; border-top: 1px solid var(--navy-border); display: flex; gap: 10px; }
.footer__disclaimer svg { flex-shrink: 0; margin-top: 2px; color: #F4B860; }
.footer__disclaimer p { font-size: 0.78rem; color: var(--navy-text-dim); line-height: 1.6; }
.footer__bottom { margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--navy-border); display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; font-size: 0.78rem; color: var(--navy-text-dim); }

/* ---------- 18. Forms ---------- */
.field { display: flex; flex-direction: column; gap: 7px; }
.field label { font-size: 0.86rem; font-weight: 700; color: var(--text-muted); }
.field .req { color: var(--accent); }
.field input, .field textarea, .field select {
  padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border-strong); background: #fff; color: var(--text); width: 100%;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(37,99,235,0.15); }
.field__note { font-size: 0.78rem; color: var(--text-dim); }
.form-grid { display: grid; gap: 18px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .form-grid--2 { grid-template-columns: 1fr 1fr; } }
.form-card { padding: 30px; max-width: 480px; margin-inline: auto; }
.form-card--wide { max-width: 640px; }
.form-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 18px; font-size: 0.86rem; color: var(--text-muted); flex-wrap: wrap; gap: 10px; }
.form-foot a { color: var(--accent); font-weight: 700; }
.sort-select-wrap { display: flex; align-items: center; gap: 8px; }
.sort-select-wrap label { font-size: 0.82rem; color: var(--text-dim); white-space: nowrap; }
.sort-select {
  padding: 10px 34px 10px 14px; border-radius: 10px; border: 1px solid var(--border-strong); background: #fff; color: var(--text);
  appearance: none; -webkit-appearance: none; cursor: pointer; font-size: 0.86rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%234B5A72' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.sort-select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(37,99,235,0.15); }
.password-field { position: relative; }
.password-toggle { position: absolute; right: 10px; top: 34px; color: var(--text-dim); background: transparent; border: 0; }

/* ---------- 19. Tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table.data-table { min-width: 640px; }
.data-table th, .data-table td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
.data-table th { color: var(--text-dim); font-weight: 700; text-transform: uppercase; font-size: 0.72rem; letter-spacing: 0.06em; background: var(--bg-alt); }
.data-table tr:last-child td { border-bottom: none; }
.data-table td.mono, .data-table th.mono { font-family: var(--font-mono); }

.status-tag { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; font-size: 0.74rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.03em; }
.status-tag--pending { background: var(--warning-bg); color: var(--warning); }
.status-tag--processing { background: rgba(37,99,235,0.1); color: var(--accent); }
.status-tag--shipped { background: rgba(37,99,235,0.14); color: var(--accent-2); }
.status-tag--delivered { background: rgba(15,157,102,0.12); color: var(--success); }
.status-tag--cancelled { background: rgba(220,38,38,0.1); color: var(--danger); }
.status-tag--refunded { background: rgba(107,124,149,0.12); color: var(--text-dim); }

/* ---------- 20. Breadcrumbs ---------- */
.breadcrumbs { padding-block: 18px; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 6px; font-size: 0.82rem; color: var(--text-dim); }
.breadcrumbs a { color: var(--text-dim); }
.breadcrumbs a:hover { color: var(--accent); }
.crumb-sep { margin-left: 6px; opacity: 0.5; }

/* ---------- 21. Accordion (FAQ) ---------- */
.accordion { display: flex; flex-direction: column; gap: 10px; }
.accordion__item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 4px 20px; box-shadow: var(--shadow-card); }
.accordion__item summary { list-style: none; display: flex; align-items: center; justify-content: space-between; padding: 16px 0; font-weight: 700; cursor: pointer; }
.accordion__item summary::-webkit-details-marker { display: none; }
.accordion__chevron { transition: transform .2s ease; color: var(--text-dim); }
.accordion__item[open] .accordion__chevron { transform: rotate(180deg); color: var(--accent); }
.accordion__body { padding-bottom: 18px; color: var(--text-muted); font-size: 0.94rem; }
.faq-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; }
.faq-tab { padding: 9px 16px; border-radius: 999px; border: 1px solid var(--border); font-size: 0.85rem; color: var(--text-muted); }
.faq-tab.is-active { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

/* ---------- 22. Empty states / error pages ---------- */
.empty-state { text-align: center; padding: 64px 20px; max-width: 460px; margin-inline: auto; }
.empty-state__icon { width: 72px; height: 72px; border-radius: 20px; background: var(--bg-card); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; color: var(--accent); box-shadow: var(--shadow-card); }
.empty-state h3 { margin-bottom: 10px; }
.empty-state p { color: var(--text-muted); margin-bottom: 22px; }

.error-page { min-height: 60vh; display: flex; align-items: center; justify-content: center; text-align: center; padding: 60px 20px; }
.error-page__code { font-family: var(--font-mono); font-size: clamp(3.5rem, 12vw, 6.5rem); font-weight: 800; background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; line-height: 1; }
.error-page h1 { margin-top: 10px; }
.error-page p { color: var(--text-muted); margin: 14px 0 26px; max-width: 460px; margin-inline: auto; }

/* ---------- 23. COA library ---------- */
.coa-search { display: grid; gap: 14px; grid-template-columns: 1fr; margin-bottom: 34px; }
@media (min-width: 720px) { .coa-search { grid-template-columns: 1fr auto; align-items: end; } }
.coa-search__field { display: flex; gap: 10px; background: #fff; border: 1px solid var(--border-strong); border-radius: 12px; padding: 6px 6px 6px 16px; align-items: center; }
.coa-search__field input { flex: 1; background: transparent; border: 0; padding: 12px 0; color: var(--text); }
.coa-search__field svg { color: var(--text-dim); }
.coa-row { display: grid; grid-template-columns: 1fr; gap: 14px; padding: 20px; }
@media (min-width: 760px) { .coa-row { grid-template-columns: 2fr 1fr 1fr 1fr auto; align-items: center; gap: 20px; } }
.coa-row__label { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); margin-bottom: 4px; display: block; }
.coa-row__value { font-size: 0.92rem; }

/* ---------- 24. Cart / checkout ---------- */
.cart-layout { display: grid; gap: 30px; grid-template-columns: 1fr; }
@media (min-width: 980px) { .cart-layout { grid-template-columns: 1.7fr 1fr; align-items: start; } }
.cart-line { display: grid; grid-template-columns: 72px 1fr auto; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--border); align-items: center; }
.cart-line__media { width: 72px; height: 72px; border-radius: 10px; background: var(--gradient-soft); display: flex; align-items: center; justify-content: center; color: var(--accent); overflow: hidden; }
.cart-line__media img { width: 100%; height: 100%; object-fit: contain; padding: 6px; }
.cart-line__name { font-weight: 700; margin-bottom: 4px; }
.cart-line__meta { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-dim); }
.qty-control { display: inline-flex; align-items: center; border: 1px solid var(--border-strong); border-radius: 999px; overflow: hidden; }
.qty-control button { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; background: transparent; color: var(--text-muted); }
.qty-control button:hover { color: var(--accent); }
.qty-control input { width: 40px; text-align: center; background: transparent; border: 0; border-left: 1px solid var(--border); border-right: 1px solid var(--border); padding: 6px 0; }
.cart-line__remove { color: var(--text-dim); font-size: 0.8rem; display: inline-flex; align-items: center; gap: 4px; margin-top: 6px; }
.cart-line__remove:hover { color: var(--danger); }
.summary-row { display: flex; justify-content: space-between; padding: 10px 0; font-size: 0.92rem; color: var(--text-muted); }
.summary-row--total { border-top: 1px solid var(--border); margin-top: 8px; padding-top: 16px; font-size: 1.1rem; font-weight: 800; color: var(--text); }

/* ---------- 25. Misc ---------- */
.divider { height: 1px; background: var(--border); border: 0; margin-block: 32px; }
.text-center { text-align: center; }
.mt-0 { margin-top: 0 !important; }
.flex-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.disclaimer-box { padding: 22px 24px; }
.disclaimer-box h3 { margin-bottom: 10px; }
.disclaimer-box p { color: var(--text-muted); font-size: 0.92rem; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.dash-tile { padding: 22px; display: flex; flex-direction: column; gap: 8px; }
.dash-tile__icon { width: 40px; height: 40px; border-radius: 10px; background: var(--gradient-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; }
.dash-nav { display: flex; flex-direction: column; gap: 4px; }
.dash-nav a { display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-radius: 10px; color: var(--text-muted); font-size: 0.9rem; }
.dash-nav a:hover, .dash-nav a.is-active { color: var(--accent); background: var(--accent-soft); }
.dash-layout { display: grid; gap: 24px; grid-template-columns: 1fr; }
@media (min-width: 900px) { .dash-layout { grid-template-columns: 240px 1fr; } }

.animate-in { animation: fadeUp .5s ease both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* ============================================================================
   26. Researcher Verification Gate — navy, premium, matches new brand system.
   Visible by default (fail-safe: unverified/no-JS visitors stay gated).
   html.gate-verified hides it — that class is only added once a valid,
   unexpired verification record is found in localStorage.
   ============================================================================ */
html:not(.gate-verified) body { overflow: hidden; height: 100dvh; }

.gate {
  position: fixed; inset: 0; z-index: 500;
  background: var(--gradient-navy);
  overflow: hidden;
}
html.gate-verified .gate { display: none; }

.gate__backdrop {
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 560px at 15% -5%, rgba(59,130,246,0.30), transparent 60%),
    radial-gradient(760px 620px at 105% 30%, rgba(37,99,235,0.26), transparent 60%),
    radial-gradient(1000px 700px at 50% 120%, rgba(96,165,250,0.10), transparent 60%);
}
.gate__grid {
  position: absolute; inset: 0; opacity: 0.4;
  background-image: linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(ellipse 70% 65% at 50% 40%, black 30%, transparent 100%);
}
.gate__glow { position: absolute; border-radius: 999px; filter: blur(60px); pointer-events: none; }
.gate__glow--a { width: 340px; height: 340px; top: -80px; left: -80px; background: rgba(59,130,246,0.28); }
.gate__glow--b { width: 380px; height: 380px; bottom: -120px; right: -100px; background: rgba(96,165,250,0.24); }
.gate__vial {
  position: absolute; right: 4%; bottom: 2%; color: #8FC2FF; opacity: 0.10;
  transform: rotate(-8deg);
}
@media (max-width: 720px) { .gate__vial { opacity: 0.08; right: -8%; bottom: -4%; } }

.gate__scroll {
  position: relative; z-index: 1; height: 100%; height: 100dvh; overflow-y: auto;
  display: flex; align-items: center; justify-content: center;
  padding: 32px 20px;
}

.gate__card {
  position: relative; width: 100%; max-width: 460px;
  background: var(--navy-card); border: 1px solid var(--navy-border-strong); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glow), var(--shadow-navy);
  backdrop-filter: blur(22px); -webkit-backdrop-filter: blur(22px);
  padding: 40px 32px 32px;
  text-align: center; color: var(--navy-text);
}
@media (min-width: 560px) { .gate__card { padding: 48px 44px 36px; } }

.gate__brand { display: flex; flex-direction: column; align-items: center; gap: 8px; margin-bottom: 22px; }
.gate__brand .brand__text { align-items: center; }
.gate__brand .brand__name { font-size: 1.15rem; color: var(--navy-text); }
.gate__brand .brand__sub { color: var(--navy-text-dim); }

.gate__badge { margin-bottom: 16px; }
.gate__card h1 { font-size: clamp(1.5rem, 4vw, 1.9rem); margin-bottom: 12px; color: var(--navy-text); }
.gate__desc { color: var(--navy-text-muted); font-size: 0.95rem; margin-bottom: 26px; }

.gate__form { display: flex; flex-direction: column; gap: 12px; margin-bottom: 22px; }

.gate__check {
  position: relative;
  display: flex; align-items: flex-start; gap: 12px; text-align: left; cursor: pointer;
  padding: 14px 16px; border-radius: 12px; border: 1px solid var(--navy-border); background: rgba(255,255,255,0.03);
  transition: border-color .15s ease, background .15s ease;
}
.gate__check:hover { border-color: rgba(143,194,255,0.4); background: var(--navy-card-hover); }
/* The real input covers the entire row and sits on top (z-index 2) so it is
   always the element that receives the click/tap — both for real users and
   for automated testing tools. It stays visually invisible (opacity: 0);
   the styled box + label below are purely decorative and never intercept
   pointer events, so there is no possibility of a "dead" click. */
.gate__check input {
  position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; padding: 0;
  opacity: 0; cursor: pointer; z-index: 2;
}
.gate__check-box {
  position: relative; z-index: 1; pointer-events: none;
  flex-shrink: 0; width: 22px; height: 22px; margin-top: 1px; border-radius: 6px;
  border: 2px solid var(--navy-border-strong); display: flex; align-items: center; justify-content: center;
  color: #fff; transition: background .18s ease, border-color .18s ease, transform .15s ease;
}
.gate__check-box svg { opacity: 0; transform: scale(0.5); transition: opacity .15s ease, transform .15s ease; }
.gate__check input:checked ~ .gate__check-box { background: var(--gradient); border-color: transparent; }
.gate__check input:checked ~ .gate__check-box svg { opacity: 1; transform: scale(1); }
.gate__check input:focus-visible ~ .gate__check-box { outline: 2px solid #8FC2FF; outline-offset: 2px; }
.gate__check-label { position: relative; z-index: 1; pointer-events: none; font-size: 0.9rem; color: var(--navy-text); line-height: 1.45; }

.gate__enter { margin-top: 4px; }

.gate__disclaimer {
  display: flex; align-items: flex-start; gap: 8px; text-align: left;
  font-size: 0.78rem; color: var(--navy-text-dim); line-height: 1.55; margin-bottom: 18px;
}
.gate__disclaimer svg { flex-shrink: 0; margin-top: 2px; color: #F4B860; }

.gate__exit { display: inline-block; font-size: 0.85rem; color: var(--navy-text-dim); text-decoration: underline; text-underline-offset: 3px; }
.gate__exit:hover { color: var(--navy-text-muted); }

/* ============================================================================
   27. Promo banner + Popular Picks accent color
   ============================================================================ */
.promo-banner {
  position: relative; overflow: hidden; border-radius: var(--radius-lg);
  border: 1px solid rgba(200,134,43,0.28);
  background:
    radial-gradient(600px 300px at 15% 0%, rgba(224,168,69,0.14), transparent 60%),
    radial-gradient(500px 320px at 100% 100%, rgba(97,82,196,0.10), transparent 60%),
    var(--bg-card);
  padding: 32px 28px; box-shadow: var(--shadow-card);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px;
}
.promo-banner__icon {
  width: 52px; height: 52px; border-radius: 14px; flex-shrink: 0;
  background: var(--gradient-gold); color: #fff;
  display: flex; align-items: center; justify-content: center;
}
.promo-banner__copy { flex: 1; min-width: 220px; }
.promo-banner__copy h2 { font-size: 1.2rem; margin-bottom: 6px; }
.promo-banner__copy p { color: var(--text-muted); font-size: 0.92rem; }
.promo-banner .btn--primary { background: var(--gradient-gold); box-shadow: 0 0 0 1px rgba(200,134,43,0.25), 0 8px 32px -8px rgba(200,134,43,0.35); }
.promo-banner .btn--primary:hover { filter: brightness(1.06); }

.popular-card { position: relative; }
.popular-card::before {
  content: ""; position: absolute; inset: -1px; border-radius: var(--radius); padding: 1px;
  background: var(--gradient-gold); opacity: 0.55;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  pointer-events: none;
}
.pill--popular { background: var(--gradient-teal-blue); color: #fff; border-color: transparent; }

/* ============================================================================
   28. Scientific artwork — molecular / peptide-chain / grid / particle motifs
   Reusable decorative layers used throughout the homepage. All purely
   decorative (aria-hidden), tasteful, and performance-light (SVG + CSS only).
   ============================================================================ */
.artwork-grid {
  position: absolute; inset: 0; pointer-events: none; opacity: 0.5;
  background-image: linear-gradient(rgba(15,35,70,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(15,35,70,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 20%, transparent 100%);
}
.section--navy .artwork-grid {
  background-image: linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
}
.artwork-molecule { position: absolute; pointer-events: none; color: var(--accent); opacity: 0.12; }
.section--navy .artwork-molecule { color: #8FC2FF; opacity: 0.16; }
.artwork-molecule--float { animation: float 8s ease-in-out infinite; }

.peptide-chain { position: absolute; pointer-events: none; opacity: 0.14; }
.peptide-chain circle, .peptide-chain path { vector-effect: non-scaling-stroke; }

.glow-blob { position: absolute; border-radius: 999px; filter: blur(70px); pointer-events: none; z-index: -1; }

/* ---------- 29. Featured / Popular / Explore section polish ---------- */
.section-cta { display: flex; justify-content: center; margin-top: 36px; }
.badge-row { display: flex; flex-wrap: wrap; gap: 10px; }