/* ============================================
   Synergy Quantum — Design System v2
   Premium modern design inspired by Stripe,
   Linear, Vercel, PQShield, Rambus
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ── Brand Tokens ── */
:root {
  /* Brand colors from logo: red + silver + dark */
  --brand-red: #C42B2B;
  --brand-red-light: #E04444;
  --brand-red-dark: #9A1F1F;
  --brand-red-glow: rgba(196, 43, 43, 0.25);
  --brand-silver: #8B8B8B;
  --brand-silver-light: #B0B0B0;

  /* Neutrals */
  --white: #FFFFFF;
  --gray-25: #FCFCFD;
  --gray-50: #F9FAFB;
  --gray-100: #F2F4F7;
  --gray-200: #EAECF0;
  --gray-300: #D0D5DD;
  --gray-400: #98A2B3;
  --gray-500: #667085;
  --gray-600: #475467;
  --gray-700: #344054;
  --gray-800: #1D2939;
  --gray-900: #101828;
  --gray-950: #0C111D;

  /* Dark mode surfaces */
  --surface-primary: #0A0A0B;
  --surface-elevated: #111113;
  --surface-overlay: #19191C;
  --surface-subtle: #222225;
  --border-subtle: rgba(255,255,255,0.06);
  --border-default: rgba(255,255,255,0.09);
  --border-strong: rgba(255,255,255,0.14);

  /* Text */
  --text-primary: rgba(255,255,255,0.92);
  --text-secondary: rgba(255,255,255,0.56);
  --text-tertiary: rgba(255,255,255,0.36);
  --text-on-light: #101828;
  --text-on-light-secondary: #475467;

  /* Functional */
  --success: #12B76A;
  --warning: #F79009;

  /* Typography */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --tracking-tight: -0.025em;
  --tracking-tighter: -0.04em;

  /* Spacing scale (4px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.24);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.28);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.32);
  --shadow-glow: 0 0 40px var(--brand-red-glow);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--surface-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color var(--duration-fast) var(--ease-out); }
img { max-width: 100%; height: auto; display: block; }
button { font-family: var(--font); cursor: pointer; }
ul, ol { list-style: none; }

/* ── Layout ── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ════════════════════════════════════════
   NAVIGATION
   ════════════════════════════════════════ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(10, 10, 11, 0.8);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--duration-normal) var(--ease-out);
}

.navbar.scrolled {
  background: rgba(10, 10, 11, 0.95);
  border-bottom-color: var(--border-default);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav-logo img {
  height: 32px;
  width: auto;
}

.nav-logo .logo-text {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

.nav-logo .logo-text span { color: var(--brand-red); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-links a {
  padding: var(--space-2) var(--space-3);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--duration-fast) var(--ease-out);
}

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

/* Dropdown */
.nav-dropdown { position: relative; }
.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  min-width: 240px;
  background: var(--surface-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow: var(--shadow-xl);
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-menu a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.dropdown-menu a:hover { background: var(--surface-overlay); color: var(--text-primary); }

.dropdown-icon {
  width: 28px; height: 28px;
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem;
  flex-shrink: 0;
}
.dropdown-icon.pqc { background: rgba(196, 43, 43, 0.12); color: var(--brand-red-light); }
.dropdown-icon.security { background: rgba(18, 183, 106, 0.12); color: var(--success); }
.dropdown-icon.quantum { background: rgba(139, 92, 246, 0.12); color: #A78BFA; }
.dropdown-icon.processor { background: rgba(247, 144, 9, 0.12); color: var(--warning); }
.dropdown-icon.soc { background: rgba(255, 255, 255, 0.08); color: var(--text-secondary); }

.nav-cta {
  background: var(--brand-red) !important;
  color: var(--white) !important;
  font-weight: 600 !important;
  border-radius: var(--radius-sm) !important;
  padding: var(--space-2) var(--space-5) !important;
  transition: all var(--duration-fast) var(--ease-out) !important;
}
.nav-cta:hover {
  background: var(--brand-red-light) !important;
  box-shadow: var(--shadow-glow) !important;
}

.nav-toggle {
  display: none;
  background: none; border: none;
  color: var(--text-primary);
  font-size: 1.25rem;
  padding: var(--space-2);
}

/* ════════════════════════════════════════
   HERO
   ════════════════════════════════════════ */
.hero {
  position: relative;
  padding: 160px 0 120px;
  overflow: hidden;
  background: var(--surface-primary);
}

/* Subtle gradient orbs */
.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -100px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(196, 43, 43, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -300px;
  left: -200px;
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(139, 139, 139, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

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

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4) var(--space-1) var(--space-2);
  background: var(--surface-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
}

.hero-eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand-red);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.75rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: var(--tracking-tighter);
  line-height: 1.08;
  color: var(--text-primary);
  max-width: 720px;
  margin-bottom: var(--space-6);
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--brand-red-light) 0%, var(--brand-red) 50%, var(--brand-silver-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .lead {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: var(--space-10);
  font-weight: 400;
}

.hero-actions { display: flex; gap: var(--space-4); flex-wrap: wrap; }

.hero-metrics {
  display: flex;
  gap: var(--space-16);
  margin-top: var(--space-20);
  padding-top: var(--space-10);
  border-top: 1px solid var(--border-subtle);
}

.metric .metric-value {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
}

.metric .metric-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: var(--space-1);
}

/* ── Product hero (smaller) ── */
.hero-product { padding: 140px 0 80px; }
.hero-product h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  max-width: 640px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-bottom: var(--space-6);
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--brand-red-light); }
.breadcrumb .sep { opacity: 0.3; }

/* ════════════════════════════════════════
   BUTTONS
   ════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  transition: all var(--duration-fast) var(--ease-out);
  cursor: pointer;
  font-family: var(--font);
  line-height: 1.5;
}

.btn-primary {
  background: var(--brand-red);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--brand-red-light);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-default);
}
.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background: var(--surface-overlay);
}

.btn-lg { padding: var(--space-4) var(--space-8); font-size: 0.95rem; }
.btn-sm { padding: var(--space-2) var(--space-4); font-size: 0.8rem; }

/* ════════════════════════════════════════
   SECTIONS
   ════════════════════════════════════════ */
.section {
  padding: var(--space-24) 0;
}

.section-header {
  max-width: 560px;
  margin-bottom: var(--space-16);
}

.section-header.centered {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brand-red);
  margin-bottom: var(--space-4);
}

.section-header h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  line-height: 1.15;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Light section variant */
.section-light {
  background: var(--gray-50);
  color: var(--text-on-light);
}
.section-light .section-header h2 { color: var(--gray-900); }
.section-light .section-header p { color: var(--gray-600); }

/* ════════════════════════════════════════
   CARDS
   ════════════════════════════════════════ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-4);
}

.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
}

.card:hover {
  border-color: var(--border-strong);
  background: var(--surface-overlay);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
}

.tag-pqc { background: rgba(196, 43, 43, 0.1); color: var(--brand-red-light); }
.tag-security { background: rgba(18, 183, 106, 0.1); color: var(--success); }
.tag-quantum { background: rgba(139, 92, 246, 0.1); color: #A78BFA; }
.tag-system { background: rgba(247, 144, 9, 0.1); color: var(--warning); }

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: var(--space-5);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-red-light);
  transition: gap var(--duration-fast) var(--ease-out);
}
.card-link:hover { gap: 10px; color: var(--brand-red); }

/* Light card variant */
.card-light {
  background: var(--white);
  border-color: var(--gray-200);
}
.card-light:hover { border-color: var(--brand-red); box-shadow: 0 4px 24px rgba(196, 43, 43, 0.06); }
.card-light h3 { color: var(--gray-900); }
.card-light p { color: var(--gray-600); }

/* ════════════════════════════════════════
   FEATURE HIGHLIGHTS (3-col)
   ════════════════════════════════════════ */
.feature-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin: var(--space-12) 0;
}

.feature-highlight {
  padding: var(--space-8);
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  text-align: center;
}

.fh-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto var(--space-5);
  font-size: 1.2rem;
  background: rgba(196, 43, 43, 0.08);
  color: var(--brand-red-light);
}

.feature-highlight h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.feature-highlight p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ════════════════════════════════════════
   SPEC TABLE
   ════════════════════════════════════════ */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  margin: var(--space-6) 0;
}

.spec-table th {
  text-align: left;
  padding: var(--space-3) var(--space-5);
  background: var(--surface-overlay);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border-default);
}

.spec-table td {
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

.spec-table td:first-child {
  font-weight: 500;
  color: var(--text-secondary);
}

.spec-table tr:hover td { background: rgba(255,255,255,0.02); }

/* Light table variant */
.spec-table-light th { background: var(--gray-100); color: var(--gray-700); border-bottom-color: var(--gray-200); }
.spec-table-light td { border-bottom-color: var(--gray-100); color: var(--gray-900); }
.spec-table-light td:first-child { color: var(--gray-500); }

/* ════════════════════════════════════════
   FEATURE LIST
   ════════════════════════════════════════ */
.feature-list {
  columns: 2;
  column-gap: var(--space-10);
  margin: var(--space-6) 0;
}

.feature-list li {
  padding: var(--space-2) 0 var(--space-2) var(--space-6);
  position: relative;
  font-size: 0.875rem;
  color: var(--text-secondary);
  break-inside: avoid;
  line-height: 1.6;
}

.feature-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 12px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand-red);
}

/* ════════════════════════════════════════
   APPLICATION GRID
   ════════════════════════════════════════ */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-3);
  margin: var(--space-6) 0;
}

.app-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.app-item:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.app-icon {
  width: 28px; height: 28px;
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 0.85rem;
  background: rgba(196, 43, 43, 0.06);
  color: var(--brand-red-light);
}

/* ════════════════════════════════════════
   TABS
   ════════════════════════════════════════ */
.tabs { margin: var(--space-10) 0; }

.tab-nav {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: var(--space-8);
  overflow-x: auto;
}

.tab-btn {
  padding: var(--space-3) var(--space-5);
  background: none; border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-tertiary);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--duration-fast) var(--ease-out);
}

.tab-btn:hover { color: var(--text-secondary); }
.tab-btn.active { color: var(--brand-red-light); border-bottom-color: var(--brand-red); }

.tab-panel { display: none; animation: fadeUp 0.3s var(--ease-out); }
.tab-panel.active { display: block; }

@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ════════════════════════════════════════
   ACCORDION
   ════════════════════════════════════════ */
.accordion { margin: var(--space-6) 0; }

.accordion-item {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
  overflow: hidden;
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--surface-elevated);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-primary);
  transition: background var(--duration-fast) var(--ease-out);
}

.accordion-header:hover { background: var(--surface-overlay); }

.accordion-header .arrow {
  transition: transform var(--duration-normal) var(--ease-out);
  font-size: 0.7rem;
  color: var(--text-tertiary);
}
.accordion-item.open .accordion-header .arrow { transform: rotate(180deg); }

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-slow) var(--ease-out), padding var(--duration-slow) var(--ease-out);
  padding: 0 var(--space-5);
}

.accordion-item.open .accordion-body {
  max-height: 2000px;
  padding: 0 var(--space-5) var(--space-5);
}

.accordion-body p { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.7; }

/* ════════════════════════════════════════
   DELIVERY SECTION
   ════════════════════════════════════════ */
.delivery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin: var(--space-8) 0;
}

.delivery-card {
  background: var(--surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  transition: border-color var(--duration-fast) var(--ease-out);
}

.delivery-card:hover { border-color: var(--border-strong); }

.delivery-type {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--brand-red);
  margin-bottom: var(--space-4);
}

.delivery-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-3);
}

.delivery-card p {
  font-size: 0.825rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ════════════════════════════════════════
   TWO-COLUMN LAYOUT
   ════════════════════════════════════════ */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
}

.two-col h2 {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-4);
}

.two-col p { color: var(--text-secondary); margin-bottom: var(--space-6); font-size: 0.95rem; }

/* ════════════════════════════════════════
   CTA SECTION
   ════════════════════════════════════════ */
.cta-section {
  padding: var(--space-24) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--border-subtle);
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(196, 43, 43, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.cta-content {
  max-width: 480px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: var(--tracking-tight);
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.cta-section p {
  color: var(--text-secondary);
  margin-bottom: var(--space-8);
  font-size: 1rem;
}

.cta-actions { display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap; }

/* ════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════ */
.footer {
  padding: var(--space-16) 0 var(--space-8);
  border-top: 1px solid var(--border-subtle);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr repeat(3, 1fr);
  gap: var(--space-10);
  margin-bottom: var(--space-12);
}

.footer-brand p {
  font-size: 0.825rem;
  color: var(--text-tertiary);
  line-height: 1.7;
  margin-top: var(--space-4);
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
}

.footer-col li { margin-bottom: var(--space-2); }
.footer-col a { font-size: 0.825rem; color: var(--text-tertiary); }
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-subtle);
}

.footer-bottom span {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.footer-badges {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid var(--border-subtle);
  color: var(--text-tertiary);
}

/* ════════════════════════════════════════
   BLOCK DIAGRAM (SVG area)
   ════════════════════════════════════════ */
.block-diagram {
  background: var(--surface-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  padding: var(--space-10);
  margin: var(--space-8) 0;
  text-align: center;
}

/* ════════════════════════════════════════
   PARTNERS / TRUST
   ════════════════════════════════════════ */
.partners {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-5);
}

.partner-badge {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-tertiary);
}

/* ════════════════════════════════════════
   RELATED PRODUCTS
   ════════════════════════════════════════ */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

/* ════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════ */
@media (max-width: 1024px) {
  .hero-metrics { gap: var(--space-10); }
  .feature-highlights { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; gap: var(--space-10); }
  .delivery-grid { grid-template-columns: 1fr; }
  .card-grid-3, .card-grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--surface-primary);
    border-bottom: 1px solid var(--border-default);
    padding: var(--space-4);
  }
  .dropdown-menu {
    position: static;
    transform: none;
    opacity: 1; visibility: visible;
    display: none;
    box-shadow: none; border: none;
    background: var(--surface-overlay);
    margin-top: var(--space-2);
  }
  .nav-dropdown.open .dropdown-menu { display: block; }
  .hero { padding: 120px 0 80px; }
  .hero h1 { font-size: 2.25rem; }
  .hero-metrics { flex-direction: column; gap: var(--space-6); }
  .feature-highlights { grid-template-columns: 1fr; }
  .feature-list { columns: 1; }
  .card-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-4); text-align: center; }
  .section { padding: var(--space-16) 0; }
  .section-header { margin-bottom: var(--space-10); }
}

/* ════════════════════════════════════════
   UTILITIES
   ════════════════════════════════════════ */
.text-center { text-align: center; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }