/* ========================================
   PeptidePro B2B — Design System
   Philosophy: "Molecular Precision"
   ======================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Primary */
  --obsidian: #0A0E17;
  --ivory-lab: #F7F6F3;
  --signal-teal: #00C9A7;
  --signal-teal-hover: #00B396;
  /* Secondary */
  --slate-protocol: #2A3441;
  --parchment: #EDE8E0;
  --graphite-mist: #8B95A3;
  /* Accent */
  --cert-gold: #C9A84C;
  --assay-green: #34A853;
  --caution-amber: #E8A317;
  --alert-red: #D93025;
  /* Surfaces */
  --card-white: #FFFFFF;
  --hero-gradient: linear-gradient(165deg, #0A0E17 0%, #121B2B 45%, #162032 100%);
  --surface-gradient: linear-gradient(180deg, #F7F6F3 0%, #EDE8E0 100%);
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(10,14,23,0.04);
  --shadow-md: 0 4px 20px rgba(10,14,23,0.06);
  --shadow-lg: 0 12px 40px rgba(10,14,23,0.08);
  --shadow-xl: 0 20px 60px rgba(10,14,23,0.12);
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  --space-5xl: 120px;
  /* Type */
  --font-display: 'Manrope', system-ui, sans-serif;
  --font-heading: 'Manrope', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  /* Transitions */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 16px; }
body {
  font-family: var(--font-body);
  color: var(--slate-protocol);
  background: var(--ivory-lab);
  line-height: 1.625;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* --- Typography --- */
.display-hero { font-family: var(--font-display); font-size: clamp(2.5rem, 5vw, 4.5rem); font-weight: 700; line-height: 1.06; letter-spacing: -1.5px; }
h1, .h1 { font-family: var(--font-display); font-size: clamp(2rem, 3.5vw, 3rem); font-weight: 600; line-height: 1.17; letter-spacing: -1px; }
h2, .h2 { font-family: var(--font-heading); font-size: clamp(1.625rem, 2.5vw, 2.25rem); font-weight: 600; line-height: 1.22; letter-spacing: -0.5px; }
h3, .h3 { font-family: var(--font-heading); font-size: clamp(1.375rem, 2vw, 1.75rem); font-weight: 600; line-height: 1.29; letter-spacing: -0.3px; }
h4, .h4 { font-family: var(--font-heading); font-size: clamp(1.125rem, 1.5vw, 1.375rem); font-weight: 500; line-height: 1.36; }
.body-lg { font-size: 1.125rem; line-height: 1.56; }
.body-sm { font-size: 0.875rem; line-height: 1.57; letter-spacing: 0.1px; }
.caption { font-size: 0.75rem; line-height: 1.5; letter-spacing: 0.3px; font-weight: 500; }
.mono { font-family: var(--font-mono); font-size: 0.875rem; line-height: 1.57; letter-spacing: 0.5px; }
.eyebrow {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--signal-teal);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 40px;
  height: 1px;
  background: var(--signal-teal);
}

/* --- Container --- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-lg); }
@media (min-width: 1440px) { .container { padding: 0; } }

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.nav--transparent { background: transparent; }
.nav--solid {
  background: rgba(247,246,243,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--parchment);
}
.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav__logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.nav__logo-icon { width: 32px; height: 32px; }
.nav--transparent .nav__logo { color: #fff; }
.nav--solid .nav__logo { color: var(--obsidian); }
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}
.nav__link {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 500;
  position: relative;
  padding: var(--space-xs) 0;
  transition: color 0.25s ease;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--signal-teal);
  transition: width 0.25s ease-out;
}
.nav__link:hover::after, .nav__link--active::after { width: 100%; }
.nav--transparent .nav__link { color: rgba(255,255,255,0.8); }
.nav--transparent .nav__link:hover { color: #fff; }
.nav--solid .nav__link { color: var(--graphite-mist); }
.nav--solid .nav__link:hover { color: var(--signal-teal); }

/* Mobile Nav Toggle */
.nav__toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 1px;
  transition: all 0.3s ease;
}
.nav--transparent .nav__toggle span { background: #fff; }
.nav--solid .nav__toggle span { background: var(--obsidian); }
.nav__toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav__toggle.active span:nth-child(2) { opacity: 0; }
.nav__toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

@media (max-width: 768px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--obsidian);
    flex-direction: column;
    justify-content: center;
    gap: var(--space-xl);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 999;
  }
  .nav__links.open {
    opacity: 1;
    pointer-events: all;
  }
  .nav__links .nav__link {
    color: rgba(255,255,255,0.8) !important;
    font-size: 1.25rem;
  }
  .nav__links .nav__link:hover { color: #fff !important; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all 0.2s var(--ease-smooth);
  cursor: pointer;
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.btn--primary {
  background: var(--signal-teal);
  color: #fff;
  padding: 14px 32px;
  font-size: 1rem;
}
.btn--primary:hover {
  background: var(--signal-teal-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,201,167,0.3);
}
.btn--primary:active { transform: translateY(0); }
.btn--primary-lg {
  background: var(--signal-teal);
  color: #fff;
  padding: 18px 40px;
  font-size: 1.125rem;
}
.btn--primary-lg:hover {
  background: var(--signal-teal-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,201,167,0.3);
}
.btn--secondary {
  background: transparent;
  color: var(--signal-teal);
  padding: 14px 32px;
  font-size: 1rem;
  border: 1.5px solid var(--signal-teal);
}
.btn--secondary:hover {
  background: rgba(0,201,167,0.08);
  transform: translateY(-1px);
}
.btn--ghost {
  color: #fff;
  font-size: 1rem;
  padding: var(--space-xs) 0;
  position: relative;
}
.btn--ghost::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: rgba(255,255,255,0.4);
}
.btn--ghost:hover { color: var(--signal-teal); }
.btn--ghost:hover::after { background: var(--signal-teal); }
.btn--sm { padding: 10px 20px; font-size: 0.875rem; }
.btn--nav {
  background: var(--signal-teal);
  color: #fff;
  padding: 10px 24px;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}
.btn--nav:hover {
  background: var(--signal-teal-hover);
}

/* --- Sticky CTA Button --- */
.sticky-cta {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 900;
  animation: floatIn 0.6s var(--ease-out) 1s both;
}
.sticky-cta .btn {
  box-shadow: 0 8px 32px rgba(0,201,167,0.35);
  border-radius: 50px;
  padding: 16px 28px;
}
@keyframes floatIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (max-width: 768px) {
  .sticky-cta { bottom: var(--space-md); right: var(--space-md); left: var(--space-md); }
  .sticky-cta .btn { width: 100%; justify-content: center; }
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  background: var(--hero-gradient);
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-3xl);
  position: relative;
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}
.hero__content { position: relative; z-index: 2; }
.hero__eyebrow {
  color: var(--signal-teal);
  margin-bottom: var(--space-lg);
}
.hero__eyebrow::before { background: var(--signal-teal); }
.hero__title {
  color: #fff;
  margin-bottom: var(--space-lg);
}
.hero__title .teal-dot { color: var(--signal-teal); }
.hero__subtitle {
  color: var(--graphite-mist);
  font-size: 1.125rem;
  line-height: 1.56;
  max-width: 520px;
  margin-bottom: var(--space-xl);
}
.hero__ctas {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  margin-bottom: var(--space-2xl);
}
.hero__trust {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  opacity: 0.5;
  flex-wrap: wrap;
}
.hero__trust-item {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.6);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  transition: opacity 0.3s ease;
}
.hero__trust-item:hover { opacity: 1; }
.hero__trust-badge { width: 20px; height: 20px; fill: var(--cert-gold); }

.hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero__molecule {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 1;
  position: relative;
}
.hero__molecule canvas { width: 100%; height: 100%; }

/* Purity readout card */
.purity-readout {
  position: absolute;
  bottom: 10%;
  right: 5%;
  background: rgba(10,14,23,0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(0,201,167,0.2);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  z-index: 3;
}
.purity-readout__label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--graphite-mist);
  margin-bottom: var(--space-xs);
}
.purity-readout__value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--signal-teal);
}
.purity-readout__wave {
  width: 100%;
  height: 24px;
  margin-top: var(--space-sm);
}

/* Dot grid overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 32px 32px;
  z-index: 1;
  pointer-events: none;
}
/* Teal glow */
.hero::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 15%;
  width: 600px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(0,201,167,0.06) 0%, transparent 70%);
  transform: translateY(-50%);
  z-index: 1;
  pointer-events: none;
}

@media (max-width: 768px) {
  .hero { min-height: auto; padding: calc(var(--nav-height) + var(--space-2xl)) 0 var(--space-2xl); }
  .hero__grid { grid-template-columns: 1fr; text-align: center; }
  .hero__subtitle { max-width: none; margin-left: auto; margin-right: auto; }
  .hero__ctas { justify-content: center; }
  .hero__trust { justify-content: center; }
  .hero__visual { order: -1; max-height: 300px; }
  .hero__molecule { max-width: 280px; }
  .purity-readout { right: auto; left: 50%; transform: translateX(-50%); bottom: 0; }
}

/* --- Section Shared --- */
.section {
  padding: var(--space-5xl) 0;
}
.section--dark {
  background: var(--obsidian);
  color: #fff;
}
.section--parchment {
  background: var(--parchment);
}
.section__header {
  max-width: 640px;
  margin-bottom: var(--space-2xl);
}
.section__header--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.section__header .eyebrow { margin-bottom: var(--space-md); }
.section__header--center .eyebrow { justify-content: center; }
.section__header h2 { margin-bottom: var(--space-md); }
.section__header p { color: var(--graphite-mist); }
.section--dark .section__header p { color: rgba(255,255,255,0.6); }

@media (max-width: 768px) {
  .section { padding: var(--space-3xl) 0; }
}

/* --- Category Cards --- */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}
.category-card {
  background: var(--card-white);
  border: 1px solid var(--parchment);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: all 0.3s var(--ease-spring);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,201,167,0.3);
}
.category-card__icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(0,201,167,0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  transition: transform 0.3s var(--ease-spring);
}
.category-card:hover .category-card__icon { transform: scale(1.05); }
.category-card__icon svg { width: 40px; height: 40px; stroke: var(--signal-teal); fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.category-card h4 { margin-bottom: var(--space-sm); color: var(--obsidian); }
.category-card p { color: var(--graphite-mist); font-size: 0.875rem; margin-bottom: var(--space-lg); flex: 1; }
.category-card__link {
  color: var(--signal-teal);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  transition: gap 0.2s ease;
}
.category-card__link:hover { gap: var(--space-sm); }
.category-card__link svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2; }

/* --- Advantages Bar --- */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-xl);
}
.advantage-item { text-align: center; }
.advantage-item__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-md);
}
.advantage-item__icon svg { width: 48px; height: 48px; stroke: var(--signal-teal); fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.advantage-item__stat {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-xs);
}
.advantage-item__label {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-sm);
}
.advantage-item__desc {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.6;
}
@media (max-width: 1024px) {
  .advantages-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 600px) {
  .advantages-grid { grid-template-columns: 1fr 1fr; }
}

/* --- Process Timeline --- */
.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  position: relative;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 32px;
  left: calc(12.5% + 16px);
  right: calc(12.5% + 16px);
  height: 2px;
  background: var(--parchment);
}
.timeline__step { text-align: center; position: relative; }
.timeline__number {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 2px solid var(--signal-teal);
  background: var(--card-white);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--signal-teal);
  position: relative;
  z-index: 2;
}
.timeline__step h4 { margin-bottom: var(--space-sm); color: var(--obsidian); }
.timeline__step p { color: var(--graphite-mist); font-size: 0.875rem; line-height: 1.6; }
.timeline__badge {
  display: inline-block;
  margin-top: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: rgba(0,201,167,0.08);
  color: var(--signal-teal);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 4px;
}
@media (max-width: 768px) {
  .timeline { grid-template-columns: 1fr; gap: var(--space-2xl); padding-left: var(--space-2xl); }
  .timeline::before { top: 0; bottom: 0; left: 32px; right: auto; width: 2px; height: auto; }
  .timeline__number { margin: 0 0 var(--space-md); position: absolute; left: calc(-1 * var(--space-2xl)); }
  .timeline__step { text-align: left; }
}

/* --- Product Cards --- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}
.product-card {
  background: var(--card-white);
  border: 1px solid var(--parchment);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all 0.3s var(--ease-spring);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,201,167,0.3);
}
.product-card__cat {
  display: inline-block;
  padding: var(--space-xs) var(--space-sm);
  background: rgba(0,201,167,0.08);
  color: var(--signal-teal);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: 4px;
  margin-bottom: var(--space-md);
  align-self: flex-start;
}
.product-card h4 { margin-bottom: var(--space-sm); color: var(--obsidian); }
.product-card__desc {
  color: var(--graphite-mist);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: var(--space-md);
  flex: 1;
}
.product-card__specs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}
.product-card__spec {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--slate-protocol);
  background: var(--ivory-lab);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 4px;
}
.product-card__link {
  color: var(--signal-teal);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}
.product-card__link:hover { gap: var(--space-sm); }
.product-card__link svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2; }

/* --- Trust / Certifications --- */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}
.cert-card {
  background: var(--card-white);
  border: 1px solid var(--parchment);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  transition: all 0.3s ease;
}
.cert-card:hover { box-shadow: var(--shadow-md); }
.cert-card__badge {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: rgba(201,168,76,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.cert-card__badge svg { width: 28px; height: 28px; stroke: var(--cert-gold); fill: none; stroke-width: 1.5; }
.cert-card h4 { margin-bottom: var(--space-xs); color: var(--obsidian); }
.cert-card p { color: var(--graphite-mist); font-size: 0.875rem; }
.cert-card__status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--assay-green);
}
.cert-card__status::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--assay-green);
}

/* --- Trust Metrics Bar --- */
.metrics-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
  padding: var(--space-2xl) 0;
}
.metric-item { text-align: center; }
.metric-item__number {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 600;
  color: var(--obsidian);
  margin-bottom: var(--space-xs);
}
.metric-item__label { color: var(--graphite-mist); font-size: 0.875rem; }

/* --- Contact / Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}
.contact-info h2 { margin-bottom: var(--space-lg); }
.contact-info p { color: var(--graphite-mist); font-size: 1.125rem; line-height: 1.6; margin-bottom: var(--space-xl); }
.contact-methods { display: flex; flex-direction: column; gap: var(--space-md); }
.contact-method {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  transition: background 0.2s ease;
}
.contact-method:hover { background: rgba(0,201,167,0.04); }
.contact-method__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(0,201,167,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-method__icon svg { width: 20px; height: 20px; stroke: var(--signal-teal); fill: none; stroke-width: 1.5; }
.contact-method__text { font-size: 0.9375rem; color: var(--slate-protocol); }
.contact-method__text a { color: var(--signal-teal); text-decoration: underline; text-underline-offset: 2px; }

/* Form Card */
.form-card {
  background: var(--card-white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-lg);
}
.form-group {
  margin-bottom: var(--space-lg);
  position: relative;
}
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--slate-protocol);
  margin-bottom: var(--space-sm);
}
.form-group label .required { color: var(--alert-red); }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px var(--space-md);
  border: 1.5px solid var(--parchment);
  border-radius: var(--radius-sm);
  background: var(--ivory-lab);
  color: var(--obsidian);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--signal-teal);
  box-shadow: 0 0 0 3px rgba(0,201,167,0.1);
}
.form-group input.error,
.form-group select.error {
  border-color: var(--alert-red);
  box-shadow: 0 0 0 3px rgba(217,48,37,0.1);
}
.form-group .error-msg {
  color: var(--alert-red);
  font-size: 0.75rem;
  margin-top: var(--space-xs);
  display: none;
}
.form-group input.error + .error-msg,
.form-group select.error + .error-msg { display: block; }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-card .btn { width: 100%; justify-content: center; }
.form-card .caption { margin-top: var(--space-md); color: var(--graphite-mist); text-align: center; }
.form-success {
  text-align: center;
  padding: var(--space-2xl);
  display: none;
}
.form-success.active { display: block; }
.form-success svg { width: 64px; height: 64px; stroke: var(--assay-green); fill: none; stroke-width: 1.5; margin: 0 auto var(--space-lg); }
.form-success h3 { color: var(--obsidian); margin-bottom: var(--space-sm); }
.form-success p { color: var(--graphite-mist); }

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* --- Footer --- */
.footer {
  background: var(--obsidian);
  color: rgba(255,255,255,0.6);
  padding: var(--space-3xl) 0 var(--space-xl);
}
.footer__top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer__brand p { font-size: 0.875rem; line-height: 1.7; max-width: 280px; margin-top: var(--space-md); }
.footer__col h5 {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: var(--space-md);
}
.footer__col a {
  display: block;
  font-size: 0.875rem;
  padding: var(--space-xs) 0;
  transition: color 0.2s ease;
}
.footer__col a:hover { color: var(--signal-teal); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  font-size: 0.8125rem;
}
.footer__social { display: flex; gap: var(--space-md); }
.footer__social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease;
}
.footer__social a:hover { color: var(--signal-teal); }
.footer__social svg { width: 18px; height: 18px; fill: currentColor; }

@media (max-width: 768px) {
  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
  .footer__bottom { flex-direction: column; gap: var(--space-md); text-align: center; }
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  padding: calc(var(--nav-height) + var(--space-lg)) 0 var(--space-lg);
  font-size: 0.8125rem;
}
.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}
.breadcrumbs__item { display: flex; align-items: center; gap: var(--space-sm); }
.breadcrumbs__item a { color: var(--signal-teal); }
.breadcrumbs__item a:hover { text-decoration: underline; }
.breadcrumbs__sep { color: var(--graphite-mist); }
.breadcrumbs__current { color: var(--graphite-mist); }

/* --- Page Header (non-hero) --- */
.page-header {
  background: var(--hero-gradient);
  padding: calc(var(--nav-height) + var(--space-2xl)) 0 var(--space-2xl);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.page-header .eyebrow { margin-bottom: var(--space-md); }
.page-header h1 { margin-bottom: var(--space-md); }
.page-header p { color: var(--graphite-mist); max-width: 640px; font-size: 1.125rem; }

/* --- Product Detail Page --- */
.product-detail { padding: var(--space-xl) 0 var(--space-5xl); }
.product-detail__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}
.product-detail__visual {
  background: var(--obsidian);
  border-radius: var(--radius-lg);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.product-detail__visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 24px 24px;
}
.product-detail__visual::after {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(ellipse at center, rgba(0,201,167,0.08) 0%, transparent 70%);
}
.product-detail__visual svg { width: 120px; height: 120px; stroke: var(--signal-teal); fill: none; stroke-width: 1; opacity: 0.6; position: relative; z-index: 1; }
.product-detail__info h1 { color: var(--obsidian); margin-bottom: var(--space-sm); }
.product-detail__category {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: rgba(0,201,167,0.08);
  color: var(--signal-teal);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: 4px;
  margin-bottom: var(--space-lg);
}
.product-detail__desc { color: var(--slate-protocol); font-size: 1rem; line-height: 1.7; margin-bottom: var(--space-xl); }
.product-detail__specs {
  background: var(--ivory-lab);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}
.product-detail__specs h3 { font-size: 1rem; margin-bottom: var(--space-md); color: var(--obsidian); }
.specs-table { width: 100%; border-collapse: collapse; }
.specs-table tr { border-bottom: 1px solid var(--parchment); }
.specs-table tr:last-child { border: none; }
.specs-table td { padding: var(--space-sm) 0; font-size: 0.875rem; }
.specs-table td:first-child { color: var(--graphite-mist); width: 45%; font-weight: 500; }
.specs-table td:last-child { color: var(--obsidian); font-family: var(--font-mono); }

.product-detail__cta { margin-top: var(--space-xl); }

@media (max-width: 768px) {
  .product-detail__grid { grid-template-columns: 1fr; }
}

/* --- FAQ Section --- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--parchment);
  padding: var(--space-lg) 0;
}
.faq-item__q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 1.0625rem;
  color: var(--obsidian);
  gap: var(--space-md);
}
.faq-item__q svg {
  width: 20px;
  height: 20px;
  stroke: var(--graphite-mist);
  fill: none;
  stroke-width: 2;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}
.faq-item.open .faq-item__q svg { transform: rotate(180deg); }
.faq-item__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  color: var(--graphite-mist);
  font-size: 0.9375rem;
  line-height: 1.7;
}
.faq-item.open .faq-item__a { max-height: 500px; }
.faq-item__a p { padding-top: var(--space-md); }

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10,14,23,0.7);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  padding: var(--space-lg);
}
.modal-overlay.active { opacity: 1; pointer-events: all; }
.modal {
  background: var(--card-white);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--space-xl);
  position: relative;
  transform: translateY(20px);
  transition: transform 0.3s var(--ease-out);
}
.modal-overlay.active .modal { transform: translateY(0); }
.modal__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background 0.2s ease;
}
.modal__close:hover { background: var(--ivory-lab); }
.modal__close svg { width: 20px; height: 20px; stroke: var(--graphite-mist); fill: none; stroke-width: 2; }
.modal h3 { margin-bottom: var(--space-sm); color: var(--obsidian); }
.modal > p { color: var(--graphite-mist); font-size: 0.875rem; margin-bottom: var(--space-xl); }

/* --- Search Bar --- */
.search-bar {
  position: relative;
  max-width: 480px;
  margin: 0 auto var(--space-2xl);
}
.search-bar input {
  width: 100%;
  padding: 14px var(--space-md) 14px 48px;
  border: 1.5px solid var(--parchment);
  border-radius: 50px;
  background: var(--card-white);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.search-bar input:focus {
  border-color: var(--signal-teal);
  box-shadow: 0 0 0 3px rgba(0,201,167,0.1);
}
.search-bar__icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  stroke: var(--graphite-mist);
  fill: none;
  stroke-width: 2;
}

/* --- Molecular Divider --- */
.mol-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) 0;
}
.mol-divider::before, .mol-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--parchment);
}
.mol-divider svg {
  margin: 0 var(--space-md);
  width: 24px;
  height: 24px;
  stroke: var(--parchment);
  fill: none;
  stroke-width: 1.5;
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}
.fade-in.visible { opacity: 1; transform: translateY(0); }
.fade-in-stagger .fade-in:nth-child(1) { transition-delay: 0ms; }
.fade-in-stagger .fade-in:nth-child(2) { transition-delay: 100ms; }
.fade-in-stagger .fade-in:nth-child(3) { transition-delay: 200ms; }
.fade-in-stagger .fade-in:nth-child(4) { transition-delay: 300ms; }
.fade-in-stagger .fade-in:nth-child(5) { transition-delay: 400ms; }
.fade-in-stagger .fade-in:nth-child(6) { transition-delay: 500ms; }

/* Reduced motion */
@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; }
  .fade-in { opacity: 1; transform: none; }
}

/* --- Utility --- */
.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; }
.text-teal { color: var(--signal-teal); }
.text-gold { color: var(--cert-gold); }
.text-muted { color: var(--graphite-mist); }
.mb-0 { margin-bottom: 0; }
.mt-xl { margin-top: var(--space-xl); }