/* ===== Variables — White, Black & Gold ===== */
:root {
  --bg-deep: #e8e8e8;
  --bg-card: #ffffff;
  --bg-elevated: #f2f2f2;
  --text-primary: #0a0a0a;
  --text-secondary: #3d3d3d;
  --text-muted: #6b6b6b;
  --text-on-accent: #0a0a0a;
  --gold: #c9a227;
  --gold-light: #e2c04a;
  --gold-dark: #8b6914;
  --accent-cyan: var(--gold);
  --accent-violet: var(--gold-dark);
  --accent-magenta: var(--gold-light);
  --gradient-main: linear-gradient(135deg, #d4af37, #8b6914);
  --gradient-warm: linear-gradient(135deg, #e8c84a, #c9a227);
  --border-subtle: rgba(0, 0, 0, 0.1);
  --border-glow: rgba(201, 162, 39, 0.45);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-glow: 0 4px 32px rgba(201, 162, 39, 0.15);
  --font-display: 'Syne', sans-serif;
  --font-body: 'Outfit', sans-serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

body.gate-active {
  overflow: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button, input, textarea {
  font: inherit;
  color: inherit;
}

.hidden {
  display: none !important;
}

.container {
  width: min(1140px, 92vw);
  margin-inline: auto;
}

/* ===== Site & Peptide Artwork ===== */
.site-content {
  position: relative;
}

/* Keep header above main/footer so the mobile dropdown stays clickable */
.site-content > header {
  z-index: 100;
}

.site-content > main,
.site-content > footer {
  position: relative;
  z-index: 1;
}

.peptide-artwork {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.art-lab-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 0, 0, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

.art-hex-mesh {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='100' viewBox='0 0 56 100'%3E%3Cpath d='M28 2 L52 16 V44 L28 58 L4 44 V16 Z' fill='none' stroke='%23c9a227' stroke-width='0.75' opacity='0.35'/%3E%3Cpath d='M28 42 L52 56 V84 L28 98 L4 84 V56 Z' fill='none' stroke='%23c9a227' stroke-width='0.75' opacity='0.35'/%3E%3C/svg%3E");
  background-size: 56px 100px;
  opacity: 0.22;
}

.art-hplc,
.art-sequence,
.art-deco,
.art-helix-band {
  position: absolute;
  color: var(--gold-dark);
}

.art-hplc {
  width: 100%;
  height: 72px;
  left: 0;
  opacity: 0.2;
}

.art-hplc--upper {
  top: 12%;
}

.art-hplc--lower {
  bottom: 18%;
  opacity: 0.16;
}

.art-sequence {
  width: min(900px, 92vw);
  height: 48px;
  left: 50%;
  top: 38%;
  transform: translateX(-50%) rotate(-2deg);
  opacity: 0.18;
}

.art-deco {
  width: 200px;
  height: 200px;
  opacity: 0.14;
}

.art-deco--tl {
  top: 0;
  left: 0;
}

.art-deco--br {
  bottom: 0;
  right: 0;
}

.art-helix-band {
  width: 200px;
  height: 70vh;
  right: 4%;
  top: 15%;
  opacity: 0.12;
}

.amino-chains {
  position: absolute;
  inset: 0;
}

.amino-chain {
  position: absolute;
  color: var(--gold-dark);
  opacity: 0.2;
  will-change: transform;
}

.amino-chain--1 {
  width: 220px;
  top: 20%;
  left: 6%;
  animation: chain-drift-a 16s ease-in-out infinite;
}

.amino-chain--2 {
  width: 48px;
  height: 200px;
  top: 32%;
  left: 2%;
  animation: chain-drift-b 20s ease-in-out infinite;
}

.amino-chain--3 {
  width: 170px;
  top: 48%;
  right: 8%;
  transform: rotate(-8deg);
  animation: chain-drift-c 18s ease-in-out infinite;
}

.amino-chain--4 {
  width: 150px;
  top: 8%;
  right: 18%;
  transform: rotate(6deg);
  opacity: 0.17;
  animation: chain-drift-d 14s ease-in-out infinite;
}

.amino-chain--5 {
  width: 48px;
  height: 155px;
  top: 58%;
  left: 10%;
  animation: chain-drift-e 22s ease-in-out infinite;
}

.amino-chain--6 {
  width: 185px;
  top: 72%;
  left: 22%;
  transform: rotate(4deg);
  animation: chain-drift-f 17s ease-in-out infinite;
}

.amino-chain--7 {
  width: 110px;
  top: 42%;
  left: 42%;
  transform: rotate(-12deg);
  opacity: 0.15;
  animation: chain-drift-g 19s ease-in-out infinite;
}

.amino-chain--8 {
  width: 48px;
  height: 135px;
  top: 68%;
  right: 14%;
  animation: chain-drift-h 15s ease-in-out infinite;
}

@keyframes chain-drift-a {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(14px, -20px) rotate(3deg); }
}

@keyframes chain-drift-b {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(10px, 18px); }
}

@keyframes chain-drift-c {
  0%, 100% { transform: translate(0, 0) rotate(-8deg); }
  50% { transform: translate(-16px, 12px) rotate(-5deg); }
}

@keyframes chain-drift-d {
  0%, 100% { transform: translate(0, 0) rotate(6deg); }
  50% { transform: translate(-12px, 16px) rotate(9deg); }
}

@keyframes chain-drift-e {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-8px, -14px); }
}

@keyframes chain-drift-f {
  0%, 100% { transform: translate(0, 0) rotate(4deg); }
  50% { transform: translate(18px, -10px) rotate(1deg); }
}

@keyframes chain-drift-g {
  0%, 100% { transform: translate(0, 0) rotate(-12deg); }
  50% { transform: translate(12px, 14px) rotate(-8deg); }
}

@keyframes chain-drift-h {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-14px, -12px); }
}

@media (prefers-reduced-motion: reduce) {
  .amino-chain,
  .dna-rotate {
    animation: none;
  }

  .dna-rotate:not(.dna-rotate--static) {
    transform: rotateY(35deg);
  }
}

.section--art {
  position: relative;
  overflow: hidden;
}

.section--art::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, var(--gold) 20%, var(--gold) 80%, transparent);
  opacity: 0.35;
}

.section--art::after {
  content: '';
  position: absolute;
  left: 5%;
  right: 5%;
  bottom: 0;
  height: 56px;
  pointer-events: none;
  opacity: 0.14;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 400 56' preserveAspectRatio='none'%3E%3Cpath d='M0 40 H30 L42 18 L54 40 H90 L104 28 L118 40 H155 L170 12 L185 40 H220 H260 L274 32 L288 40 H325 L340 22 L355 40 H400' fill='none' stroke='%238b6914' stroke-width='1.5'/%3E%3C/svg%3E");
  background-size: 100% 100%;
  background-repeat: no-repeat;
}

/* ===== Legal Pages ===== */
.legal-page {
  padding-top: 7rem;
}

.legal-document {
  max-width: 820px;
  margin-inline: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: clamp(2rem, 4vw, 3rem);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
}

.legal-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--gold-dark);
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid rgba(201, 162, 39, 0.35);
}

.legal-document h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gold-dark);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.legal-document .effective-date {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.legal-document p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.75;
  font-size: 0.95rem;
}

.legal-document p strong {
  color: var(--text-primary);
  font-weight: 600;
}

.legal-document > p > strong:only-child,
.legal-document p strong:first-child:last-child {
  display: block;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gold-dark);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.legal-document ol,
.legal-document ul {
  margin: 1rem 0 1.5rem 1.25rem;
  color: var(--text-secondary);
}

.legal-document li {
  margin-bottom: 0.875rem;
  line-height: 1.7;
  font-size: 0.95rem;
}

.legal-document a {
  color: var(--gold-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.legal-document a:hover {
  color: var(--gold);
}

/* ===== Gate Overlay ===== */
.gate-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.gate-overlay.dismissed {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

.gate-backdrop {
  position: absolute;
  inset: 0;
  background: var(--bg-deep);
  background-image:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(201, 162, 39, 0.1), transparent),
    radial-gradient(ellipse 60% 50% at 80% 100%, rgba(0, 0, 0, 0.03), transparent);
}

.gate-card {
  position: relative;
  width: min(520px, 100%);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-glow), 0 24px 80px rgba(0, 0, 0, 0.12);
  animation: gate-enter 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes gate-enter {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.96);
  }
}

.gate-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 1.25rem;
  color: var(--accent-cyan);
}

.gate-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.75rem;
}

.gate-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.gate-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.gate-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 1rem 1.125rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.gate-checkbox:hover {
  border-color: var(--border-glow);
  background: #eeeeee;
}

.gate-checkbox input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-custom {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border: 2px solid var(--text-muted);
  border-radius: 6px;
  margin-top: 2px;
  transition: all var(--transition);
  position: relative;
}

.gate-checkbox input:checked + .checkbox-custom {
  background: var(--gradient-main);
  border-color: transparent;
}

.gate-checkbox input:checked + .checkbox-custom::after {
  content: '';
  position: absolute;
  left: 6px;
  top: 2px;
  width: 6px;
  height: 11px;
  border: solid var(--text-on-accent);
  border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg);
}

.gate-checkbox input:focus-visible + .checkbox-custom {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

.checkbox-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.checkbox-label strong {
  color: var(--text-primary);
}

.gate-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 1rem 1.5rem;
  margin-top: 0.5rem;
  border: none;
  border-radius: var(--radius-md);
  background: var(--gradient-main);
  color: var(--text-on-accent);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
}

.gate-btn:not(:disabled):hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(201, 162, 39, 0.35);
}

.gate-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.gate-legal {
  margin-top: 1.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.6;
}

.gate-legal a {
  color: var(--gold-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(232, 232, 232, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.logo--image {
  gap: 0;
}

.logo-img {
  display: block;
  height: 58px;
  width: auto;
  max-width: 320px;
  object-fit: contain;
  background: transparent;
}

.footer .logo-img {
  height: 50px;
  max-width: 280px;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--gradient-main);
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--text-on-accent);
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
}

.logo-accent {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-cta {
  padding: 0.5rem 1.25rem !important;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary) !important;
}

.nav-cta:hover {
  border-color: var(--border-glow) !important;
}

.cart-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.cart-btn:hover {
  border-color: var(--border-glow);
  background: rgba(201, 162, 39, 0.1);
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 0.85rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}

.lang-btn:hover {
  border-color: var(--border-glow);
  background: rgba(201, 162, 39, 0.1);
  color: var(--gold-light, var(--text-primary));
}

.cart-count {
  position: absolute;
  top: -6px;
  right: -6px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background: var(--gradient-main);
  border-radius: 100px;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-on-accent);
  display: none;
  align-items: center;
  justify-content: center;
}

.cart-count.visible {
  display: flex;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 0 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(201, 162, 39, 0.06) 0%, transparent 30%),
    linear-gradient(0deg, rgba(201, 162, 39, 0.05) 0%, transparent 25%);
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: visible;
}

.hero-visual-panel {
  width: 100%;
  max-width: 380px;
  min-height: 440px;
  background: #0a0a0a;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(201, 162, 39, 0.35);
  box-shadow:
    0 24px 64px rgba(0, 0, 0, 0.25),
    inset 0 0 80px rgba(201, 162, 39, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1200px;
  perspective-origin: 50% 42%;
  position: relative;
  overflow: visible;
}

.hero-visual-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 65% 55% at 50% 48%, rgba(201, 162, 39, 0.14), transparent 70%);
  pointer-events: none;
  border-radius: inherit;
}

.dna-stage {
  transform: rotateX(18deg);
  transform-style: preserve-3d;
}

.dna-helix-3d {
  width: 220px;
  height: 360px;
  position: relative;
  transform-style: preserve-3d;
}

.dna-rotate {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0;
  height: 0;
  transform-style: preserve-3d;
  animation: dna-spin 8s linear infinite;
  will-change: transform;
}

.dna-rotate--static {
  animation: none;
  transform: rotateY(40deg);
}

.dna-rung {
  position: absolute;
  left: 0;
  top: 0;
  display: flex;
  align-items: center;
  width: var(--dna-diameter, 116px);
  margin-left: calc(var(--dna-radius, 58px) * -1);
  margin-top: -6px;
  transform-style: preserve-3d;
}

.dna-node {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
  transform-style: preserve-3d;
  box-shadow:
    0 0 12px rgba(212, 175, 55, 0.6),
    0 2px 4px rgba(0, 0, 0, 0.45),
    inset 0 -3px 5px rgba(0, 0, 0, 0.3),
    inset 0 2px 3px rgba(255, 230, 140, 0.35);
}

.dna-node--a {
  background: radial-gradient(circle at 32% 28%, #ffe88a, #d4af37 45%, #8b6914 100%);
}

.dna-node--b {
  background: radial-gradient(circle at 32% 28%, #f5d76e, #b8941f 45%, #6b520f 100%);
}

.dna-bond {
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, #6b520f, #e2c04a 50%, #6b520f);
  opacity: 0.9;
  box-shadow: 0 0 8px rgba(201, 162, 39, 0.45);
}

.dna-link {
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 0;
  transform-style: preserve-3d;
}

.dna-link-rod {
  display: block;
  width: 2px;
  height: var(--dna-step, 8px);
  margin-left: -1px;
  border-radius: 2px;
  transform-origin: top center;
}

.dna-link--a .dna-link-rod {
  background: linear-gradient(180deg, #d4af37, #8b6914);
  box-shadow: 0 0 5px rgba(201, 162, 39, 0.45);
}

.dna-link--b .dna-link-rod {
  background: linear-gradient(180deg, #e8c84a, #9a7b0a);
  opacity: 0.85;
  box-shadow: 0 0 5px rgba(201, 162, 39, 0.35);
}

.dna-floor {
  position: absolute;
  left: 0;
  top: 0;
  width: 160px;
  height: 160px;
  margin-left: -80px;
  margin-top: 20px;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(201, 162, 39, 0.18) 0%, transparent 70%);
  transform: rotateX(90deg) translateZ(-20px);
  opacity: 0.5;
}

@keyframes dna-spin {
  from { transform: rotateY(0deg); }
  to { transform: rotateY(360deg); }
}

.hero-badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: rgba(201, 162, 39, 0.1);
  border: 1px solid rgba(201, 162, 39, 0.35);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gold-dark);
  letter-spacing: 0.03em;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.25rem;
  max-width: 640px;
}

.gradient-text {
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
}

.stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-chromatogram {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 12%;
  height: 100px;
  pointer-events: none;
  color: var(--gold-dark);
  opacity: 0.28;
  z-index: 0;
}

.hero-chromatogram svg {
  width: 100%;
  height: 100%;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-primary {
  background: var(--gradient-main);
  color: var(--text-on-accent);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(201, 162, 39, 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-ghost:hover {
  border-color: var(--border-glow);
  background: rgba(201, 162, 39, 0.06);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-sm {
  padding: 0.5rem 1.125rem;
  font-size: 0.85rem;
}

.btn-full {
  width: 100%;
}

/* ===== Sections ===== */
.section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-violet);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.section-desc {
  color: var(--text-secondary);
  max-width: 520px;
  margin-inline: auto;
}

/* ===== Products ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.product-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.product-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.product-card--featured {
  grid-column: 1 / -1;
}

.size-selector {
  margin-bottom: 1.25rem;
}

.size-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.size-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.size-option {
  padding: 0.45rem 0.875rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.size-option:hover {
  border-color: var(--border-glow);
  color: var(--text-primary);
}

.size-option.active {
  background: rgba(201, 162, 39, 0.12);
  border-color: var(--gold);
  color: var(--gold-dark);
}

.product-selected-size {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.product-selected-size strong {
  color: var(--text-primary);
}

.product-badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  padding: 0.25rem 0.75rem;
  background: rgba(201, 162, 39, 0.12);
  border: 1px solid rgba(201, 162, 39, 0.4);
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--gold-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
}

/* Slightly larger formula titles for flagship peptides */
[data-product-card="retatrutide"] .product-name,
[data-product-card="tirzepatide"] .product-name {
  font-size: 1.55rem;
}

.product-name sub {
  font-size: 0.72em;
  font-weight: 600;
}

.product-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.product-specs {
  margin-bottom: 1.5rem;
}

.product-specs li {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 0.3rem 0;
  padding-left: 1rem;
  position: relative;
}

.product-specs li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
}

.product-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-subtle);
}

.product-footer-meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.product-card-price {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--gold-dark);
  letter-spacing: 0.02em;
}

.product-card-price.hidden {
  display: none;
}

.btn-add-cart {
  margin-left: auto;
}

.product-price {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
}

/* ===== Quality ===== */
.quality {
  background: var(--bg-elevated);
  border-block: 1px solid var(--border-subtle);
}

.quality-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.quality-list {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.quality-list li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.quality-icon {
  color: var(--accent-cyan);
  font-size: 1.25rem;
  margin-top: 0.15rem;
}

.quality-list strong {
  display: block;
  margin-bottom: 0.25rem;
}

.quality-list p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.purity-guarantee {
  margin-top: 2rem;
  padding: 1.5rem 1.75rem;
  background: linear-gradient(135deg, rgba(201, 162, 39, 0.12), rgba(255, 255, 255, 0.9));
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glow);
}

.purity-guarantee--inline {
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
}

.purity-guarantee-badge {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.35rem 0.85rem;
  background: var(--gradient-main);
  border-radius: 100px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-on-accent);
}

.purity-guarantee-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.purity-guarantee-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.55;
  max-width: 42rem;
}

.purity-guarantee-text strong {
  color: var(--text-primary);
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 720px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item[open] {
  border-color: var(--border-glow);
}

.faq-item summary {
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--accent-cyan);
  transition: transform var(--transition);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ===== Contact ===== */
.contact-card {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 3rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 3rem;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.contact-form input,
.contact-form textarea {
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
}

.contact-form textarea {
  resize: vertical;
  min-height: 100px;
}

/* ===== Footer ===== */
.footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border-subtle);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
}

.footer-disclaimer {
  margin-top: 1rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 52rem;
}

.footer-disclaimer p {
  margin-bottom: 0.75rem;
}

.footer-disclaimer p:last-child {
  margin-bottom: 0;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-copy {
  grid-column: 1 / -1;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

/* ===== Cart ===== */
body.cart-open {
  overflow: hidden;
}

.cart-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
}

.cart-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.cart-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(420px, 100vw);
  height: 100%;
  background: var(--bg-card);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  animation: cart-slide 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes cart-slide {
  from { transform: translateX(100%); }
}

.cart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.cart-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
}

.cart-close {
  width: 36px;
  height: 36px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.cart-close:hover {
  color: var(--text-primary);
  border-color: var(--border-glow);
}

.cart-items {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.5rem;
}

.cart-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

.cart-empty p {
  margin-bottom: 1.25rem;
}

.cart-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.cart-item-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.cart-item-info {
  flex: 1;
  min-width: 0;
}

.cart-item-remove {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 1.25rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.cart-item-remove:hover {
  color: #e05252;
  border-color: rgba(224, 82, 82, 0.45);
  background: rgba(224, 82, 82, 0.08);
}

.cart-item-name {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
}

.cart-item-size {
  font-size: 0.85rem;
  color: var(--accent-cyan);
}

.cart-item-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.qty-btn {
  width: 28px;
  height: 28px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: border-color var(--transition);
}

.qty-btn:hover {
  border-color: var(--accent-cyan);
}

.qty-value {
  min-width: 24px;
  text-align: center;
  font-weight: 600;
  font-size: 0.9rem;
}

.cart-remove {
  margin-left: auto;
  background: none;
  border: none;
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition);
}

.cart-remove:hover {
  color: #f87171;
}

.cart-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

.cart-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  text-align: center;
}

/* ===== Checkout ===== */
.checkout-page {
  padding-top: 7rem;
  padding-bottom: 4rem;
}

.checkout-header {
  margin-bottom: 2rem;
}

.checkout-bac-reminder {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: rgba(201, 162, 39, 0.1);
  border: 1px solid rgba(201, 162, 39, 0.35);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.35rem;
  margin-bottom: 2rem;
}

.checkout-bac-reminder--added {
  background: rgba(34, 120, 80, 0.08);
  border-color: rgba(34, 120, 80, 0.28);
}

.checkout-bac-reminder-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-main);
  border-radius: var(--radius-sm);
  color: var(--text-on-accent);
}

.checkout-bac-reminder-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--gold-dark);
  margin-bottom: 0.35rem;
}

.checkout-bac-reminder--added .checkout-bac-reminder-title {
  color: #1a6b45;
}

.checkout-bac-reminder-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.checkout-bac-reminder-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.checkout-bac-reminder-link {
  font-size: 0.8rem;
  color: var(--gold-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
  margin-left: 0.25rem;
}

.checkout-bac-reminder-link:hover {
  color: var(--gold);
}

.checkout-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: start;
}

.checkout-section-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gold-dark);
  margin-bottom: 1.25rem;
}

.checkout-form label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.checkout-form input {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
}

.checkout-form input:focus {
  outline: none;
  border-color: var(--gold);
}

.form-row--3 {
  grid-template-columns: 1fr 1fr 0.75fr;
}

.checkout-payment {
  margin-top: 2.5rem;
}

.payment-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.payment-tab {
  flex: 1;
  min-width: 100px;
  padding: 0.875rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.payment-tab:hover {
  border-color: var(--border-glow);
  color: var(--text-primary);
}

.payment-tab.active {
  background: var(--bg-card);
  border-color: var(--gold);
  color: var(--gold-dark);
}

.payment-tab-icon {
  margin-right: 0.35rem;
}

.payment-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.payment-panel-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.payment-panel-note {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.payment-panel-note code {
  font-size: 0.75rem;
  background: var(--bg-elevated);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
}

.checkout-summary-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  position: sticky;
  top: 6rem;
}

.checkout-summary-lines {
  margin-bottom: 1.25rem;
}

.checkout-line {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.9rem;
}

.checkout-line-end {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
  flex-shrink: 0;
}

.checkout-line-remove {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.checkout-line-remove:hover {
  color: #e05252;
  border-color: rgba(224, 82, 82, 0.45);
  background: rgba(224, 82, 82, 0.08);
}

.checkout-line-name {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
}

.checkout-line-qty {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.checkout-line-price {
  font-weight: 600;
  color: var(--gold-dark);
  white-space: nowrap;
}

.checkout-totals {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}

.checkout-total-row {
  display: flex;
  justify-content: space-between;
  padding: 0.35rem 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.checkout-total-row--grand {
  margin-top: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.checkout-total-row--grand span:last-child {
  color: var(--gold-dark);
}

.checkout-legal {
  margin-top: 1.25rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.checkout-legal a {
  color: var(--gold-dark);
}

.checkout-empty {
  text-align: center;
  padding: 2rem 0;
  color: var(--text-secondary);
}

.checkout-empty p {
  margin-bottom: 1rem;
}

.checkout-setup-banner {
  background: rgba(201, 162, 39, 0.12);
  border: 1px solid rgba(201, 162, 39, 0.35);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.checkout-setup-banner code {
  font-size: 0.8rem;
  background: var(--bg-elevated);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
}

.checkout-alert {
  background: rgba(201, 162, 39, 0.1);
  border: 1px solid rgba(201, 162, 39, 0.3);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.crypto-order-box {
  display: grid;
  gap: 0.5rem;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.crypto-label {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-right: 0.5rem;
}

.crypto-wallets {
  display: grid;
  gap: 0.75rem;
}

.crypto-wallet {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.35rem 0.75rem;
  align-items: center;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
}

.crypto-wallet-label {
  grid-column: 1 / -1;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gold-dark);
}

.crypto-wallet-address {
  font-size: 0.75rem;
  word-break: break-all;
  color: var(--text-secondary);
}

.checkout-success {
  max-width: 520px;
  margin: 0 auto;
  text-align: center;
  padding: 3rem 0;
}

.checkout-success-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-main);
  border-radius: 50%;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-on-accent);
}

.checkout-success-order {
  margin: 1.5rem 0 2rem;
  color: var(--text-secondary);
}

@media (max-width: 900px) {
  .checkout-grid {
    grid-template-columns: 1fr;
  }

  .checkout-summary-card {
    position: static;
  }

  .form-row--3 {
    grid-template-columns: 1fr;
  }
}

.cart-toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10001;
  padding: 0.875rem 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
  animation: toast-in 0.3s ease;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(12px);
  }
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    z-index: 200;
    background: var(--bg-card);
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
  }

  .nav-links.open a,
  .nav-links.open button {
    position: relative;
    z-index: 1;
    pointer-events: auto;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .nav-links .cart-btn {
    align-self: flex-start;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero-visual-panel {
    max-width: 100%;
    min-height: 360px;
  }

  .art-sequence,
  .art-helix-band {
    display: none;
  }

  .amino-chain--4,
  .amino-chain--7 {
    display: none;
  }

  .amino-chain {
    opacity: 0.14;
  }

  .art-hplc {
    opacity: 0.12;
  }

  .hero-chromatogram {
    opacity: 0.18;
    height: 70px;
  }

  .quality-grid,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .hero-stats {
    gap: 2rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .contact-card {
    padding: 2rem 1.5rem;
  }

  .gate-card {
    padding: 2rem 1.25rem;
  }
}