/* ============================================
   THE RETAILER HQ — Design System v2
   "Sovereign Editorial" Glassmorphism
   ============================================ */


/* ============================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================ */
:root {
  /* ---- Core Palette — Sovereign Editorial ---- */
  --primary: #094cb2;
  --primary-mid: #1a5fc8;
  --primary-dark: #001830;
  --primary-container: #d2e4fb;
  --primary-light: rgba(9,76,178,0.07);
  --on-primary: #ffffff;

  --surface: #f8f9fe;
  --surface-low: #eef3fb;
  --surface-lowest: #ffffff;
  --surface-container-low: #f1f4f9;
  --surface-container-lowest: #ffffff;

  --on-surface: #001830;
  --on-surface-variant: #3a5068;
  --outline: #76767f;
  --outline-variant: rgba(9,76,178,0.12);
  --accent: #e8f0fd;

  /* ---- Legacy color mappings for backward compat ---- */
  --sovereign-navy: #001830;
  --electric-blue: #094cb2;
  --electric-blue-light: #5588ee;
  --electric-blue-glow: rgba(9,76,178,0.10);
  --authority-teal: #0F7E6E;
  --authority-teal-light: #9cf2e8;
  --urgency-amber: #B45309;
  --urgency-amber-bg: #FEF3C7;
  --data-ice: #F8FAFE;

  /* ---- Semantic Colors ---- */
  --success: #10B981;
  --error: #EF4444;
  --warning: #F59E0B;

  /* ---- Typography ---- */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --display-lg: 3.5rem;
  --display-md: 3rem;
  --display-sm: 2.5rem;
  --headline-lg: 2rem;
  --headline-md: 1.75rem;
  --headline-sm: 1.5rem;
  --title-lg: 1.375rem;
  --title-md: 1.125rem;
  --body-lg: 1rem;
  --body-md: 0.9375rem;
  --body-sm: 0.875rem;
  --label-lg: 0.8125rem;
  --label-md: 0.75rem;
  --label-sm: 0.6875rem;

  /* ---- Spacing ---- */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 8rem;

  /* ---- Roundedness ---- */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 1.75rem;
  --radius-full: 9999px;

  /* ---- Shadows — Premium ---- */
  --shadow-soft: 0 2px 8px rgba(9,76,178,0.04);
  --shadow-card: 0 4px 24px rgba(9,76,178,0.06);
  --shadow-elevated: 0 12px 48px rgba(9,76,178,0.08);
  --shadow-float: 0 24px 64px rgba(9,76,178,0.12);
  --shadow-premium: 0 20px 60px -12px rgba(9,76,178,0.10);

  /* ---- Transitions ---- */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);
  --duration-fast: 200ms;
  --duration-normal: 350ms;
  --duration-slow: 500ms;

  /* ---- Layout ---- */
  --max-width: 1240px;
  --nav-height: 68px;
}

/* ============================================
   2. RESET & BASE
   ============================================ */
*, *::before, *::after {
  margin: 0; padding: 0; box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-primary);
  font-size: var(--body-lg);
  line-height: 1.7;
  color: var(--on-surface);
  background: var(--surface);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--duration-fast) var(--ease-smooth); }
ul, ol { list-style: none; }

/* ============================================
   3. GLASS UTILITIES
   ============================================ */
.glass {
  background: rgba(255,255,255,0.65);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,0.45);
}
.glass-tinted {
  background: rgba(9,76,178,0.06);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(9,76,178,0.10);
}
.premium-shadow { box-shadow: var(--shadow-premium); }

/* ---- Orbs ---- */
.orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

/* ============================================
   4. TYPOGRAPHY
   ============================================ */
.display-lg {
  font-size: var(--display-lg); font-weight: 800;
  line-height: 1.06; letter-spacing: -0.03em;
}
.display-md {
  font-size: var(--display-md); font-weight: 800;
  line-height: 1.08; letter-spacing: -0.03em;
}
.display-sm {
  font-size: var(--display-sm); font-weight: 800;
  line-height: 1.10; letter-spacing: -0.025em;
}
.headline-lg {
  font-size: var(--headline-lg); font-weight: 800;
  line-height: 1.12; letter-spacing: -0.025em;
}
.headline-md {
  font-size: var(--headline-md); font-weight: 700;
  line-height: 1.20; letter-spacing: -0.015em;
}
.headline-sm {
  font-size: var(--headline-sm); font-weight: 700;
  line-height: 1.25;
}
.title-lg {
  font-size: var(--title-lg); font-weight: 600; line-height: 1.4;
}
.title-md {
  font-size: var(--title-md); font-weight: 600; line-height: 1.4;
}
.body-lg { font-size: var(--body-lg); font-weight: 400; line-height: 1.7; }
.body-md { font-size: var(--body-md); font-weight: 400; line-height: 1.6; }
.body-sm { font-size: var(--body-sm); font-weight: 400; line-height: 1.6; }
.label-lg {
  font-size: var(--label-lg); font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
}
.label-md {
  font-size: var(--label-md); font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
}
.label-sm {
  font-size: var(--label-sm); font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
}

/* Text Colors */
.text-primary { color: var(--primary); }
.text-blue { color: var(--primary); }
.text-teal { color: var(--authority-teal); }
.text-muted { color: var(--on-surface-variant); }
.text-white { color: #ffffff; }

/* ============================================
   5. LAYOUT UTILITIES
   ============================================ */
.container {
  width: 100%; max-width: var(--max-width);
  margin: 0 auto; padding: 0 var(--space-lg);
}
.section { padding: 100px 0; }
.section--surface { background: var(--surface); }
.section--surface-low { background: var(--surface-low); }
.section--white { background: var(--surface-lowest); }
.section--navy {
  background: var(--on-surface);
  color: var(--on-primary);
}
.section--navy .text-muted { color: rgba(255,255,255,0.55); }
.section--navy .text-blue { color: rgba(99,162,255,0.90); }
.section--navy .btn--secondary {
  background: transparent;
  color: var(--on-primary);
  box-shadow: inset 0 0 0 1.5px rgba(255,255,255,0.35);
}
.section--navy .btn--secondary:hover {
  background: rgba(255,255,255,0.08);
  box-shadow: inset 0 0 0 1.5px rgba(255,255,255,0.60), var(--shadow-card);
}
.section--ice { background: var(--surface-container-low); }

/* Grid System */
.grid { display: grid; gap: var(--space-md); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.text-center { text-align: center; }
.text-left { text-align: left; }

/* ============================================
   6. NAVIGATION — Glassmorphism
   ============================================ */
.nav {
  position: sticky; top: 0; z-index: 1000;
  height: var(--nav-height);
  transition: background var(--duration-normal) var(--ease-smooth),
    box-shadow var(--duration-normal) var(--ease-smooth);
}
.nav--solid {
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  border-bottom: 1px solid rgba(9,76,178,0.08);
}
.nav--solid .nav__logo { color: var(--on-surface); }
.nav--solid .nav__link { color: var(--on-surface-variant); }
.nav--solid .nav__link:hover,
.nav--solid .nav__link--active { color: var(--primary); }
.nav--solid .nav__login { color: var(--on-surface-variant); }
.nav--solid .nav__login:hover { color: var(--primary); }

.nav--transparent {
  background: rgba(255,255,255,0.40);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.20);
}
.nav--transparent .nav__logo { color: var(--on-surface); }
.nav--transparent .nav__link { color: var(--on-surface-variant); }
.nav--transparent .nav__link:hover,
.nav--transparent .nav__link--active { color: var(--primary); }

.nav__inner {
  max-width: var(--max-width); margin: 0 auto;
  padding: 0 var(--space-lg); height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.nav__logo {
  font-size: 17px; font-weight: 800; color: var(--on-surface);
  letter-spacing: -0.03em; text-transform: uppercase;
  display: flex; align-items: center; gap: var(--space-xs);
}
.nav__logo span { color: var(--primary); }
.nav__logo img { height: 28px; width: auto; }
.nav__links {
  display: flex; align-items: center; gap: 36px;
}
.nav__link {
  font-size: 13px; font-weight: 500; color: var(--on-surface-variant);
  letter-spacing: 0.01em;
  transition: color var(--duration-fast) var(--ease-smooth);
  position: relative;
}
.nav__link::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--primary);
  transition: width var(--duration-normal) var(--ease-spring);
}
.nav__link:hover, .nav__link--active { color: var(--primary); }
.nav__link:hover::after, .nav__link--active::after { width: 100%; }
.nav__link--active { font-weight: 600; }
.nav__link:focus-visible {
  outline: 2px solid var(--primary); outline-offset: 4px; border-radius: 2px;
}
.nav__actions { display: flex; align-items: center; gap: var(--space-md); }
.nav__login {
  font-size: var(--body-sm); font-weight: 500; color: var(--on-surface-variant);
}
.nav__login:hover { color: var(--primary); }

/* Mobile Nav */
.nav__hamburger {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; padding: 8px; background: none; border: none; z-index: 1001;
}
.nav__hamburger span {
  width: 22px; height: 2px; background: var(--on-surface);
  transition: transform var(--duration-normal) var(--ease-spring),
    opacity var(--duration-fast) var(--ease-smooth);
  display: block;
}
.nav__hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.active span:nth-child(2) { opacity: 0; }
.nav__hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__mobile-menu {
  display: none; position: fixed; top: 0; left: 0; right: 0;
  height: 100vh; height: 100dvh;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  z-index: 999; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--space-lg); opacity: 0; transform: translateY(-10px);
  padding-top: var(--nav-height); box-sizing: border-box; overflow-y: auto;
  transition: opacity var(--duration-normal) var(--ease-smooth),
    transform var(--duration-normal) var(--ease-spring);
}
.nav__mobile-menu.open { display: flex; opacity: 1; transform: translateY(0); }
.nav__mobile-menu .nav__link { font-size: var(--headline-sm); font-weight: 600; }

/* ============================================
   7. BUTTONS — Premium Gradient
   ============================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-family: var(--font-primary); font-weight: 600; border: none; cursor: pointer;
  transition: transform var(--duration-normal) var(--ease-spring),
    box-shadow var(--duration-normal) var(--ease-smooth),
    opacity var(--duration-fast) var(--ease-smooth);
  white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }
.btn:active { transform: scale(0.97); }

/* Primary — Gradient */
.btn--primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-mid) 100%);
  color: var(--on-primary);
  padding: 11px 24px; border-radius: 10px;
  font-size: 13px; font-weight: 600; letter-spacing: 0.02em;
  box-shadow: 0 4px 20px rgba(9,76,178,0.28);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(9,76,178,0.36);
}

/* Secondary — Ghost */
.btn--secondary {
  background: var(--surface-lowest); color: var(--primary);
  padding: 11px 24px; border-radius: 10px;
  font-size: 13px; font-weight: 600;
  box-shadow: inset 0 0 0 1.5px var(--outline-variant);
}
.btn--secondary:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 0 0 1.5px var(--outline), var(--shadow-card);
}

/* Outline — Glass */
.btn--outline {
  background: rgba(255,255,255,0.70);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(9,76,178,0.18);
  color: var(--primary); cursor: pointer;
  padding: 10px 22px; border-radius: 10px;
  font-size: 13px; font-weight: 600;
  transition: all 0.25s;
}
.btn--outline:hover { background: rgba(255,255,255,0.95); }

/* Tertiary — Text link */
.btn--tertiary {
  background: none; color: var(--primary);
  padding: 0.5rem 0; font-size: var(--body-md); border-radius: 0;
}
.btn--tertiary:hover { opacity: 0.8; }
.btn--tertiary::after {
  content: '→'; margin-left: 0.25rem;
  transition: transform var(--duration-normal) var(--ease-spring); display: inline-block;
}
.btn--tertiary:hover::after { transform: translateX(4px); }

/* Sizes */
.btn--sm { padding: 9px 18px; font-size: 12px; }
.btn--lg { padding: 16px 36px; border-radius: 12px; font-size: 14px; }

/* White variant */
.btn--white {
  background: var(--surface-lowest); color: var(--primary);
  padding: 11px 24px; border-radius: 10px;
  font-size: 13px; font-weight: 600;
  box-shadow: 0 4px 20px rgba(0,0,0,0.10);
}
.btn--white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

/* ============================================
   8. CARDS — Glass Interactive
   ============================================ */
.card {
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.80);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  transition: all 0.3s var(--ease-smooth);
  box-shadow: 0 4px 20px rgba(9,76,178,0.04);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-elevated);
}
.card--flat {
  box-shadow: none;
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.80);
}
.card--elevated { box-shadow: var(--shadow-card); }
.card--dark {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-mid) 100%);
  color: var(--on-primary);
  border: none;
}
.card--interactive { cursor: pointer; }
.card--interactive:hover {
  background: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(9,76,178,0.22);
  border-color: var(--primary);
}
.card--interactive:hover .card__icon,
.card--interactive:hover .title-md,
.card--interactive:hover .body-sm,
.card--interactive:hover h3,
.card--interactive:hover p { color: white; }
.card--interactive:hover .card__icon { background: rgba(255,255,255,0.15); }

.card__icon {
  width: 48px; height: 48px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  background: var(--electric-blue-glow); color: var(--primary);
  margin-bottom: var(--space-md); font-size: 1.25rem;
  transition: all 0.3s;
}
.card__icon--teal {
  background: rgba(15, 126, 110, 0.1); color: var(--authority-teal);
}
.card__icon--amber {
  background: rgba(180, 83, 9, 0.1); color: var(--urgency-amber);
}

/* ============================================
   9. EYEBROW CHIP
   ============================================ */
.eyebrow-chip {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(9,76,178,0.08);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(9,76,178,0.14);
  color: var(--primary);
  padding: 6px 14px; border-radius: 100px;
  font-size: 10px; font-weight: 700;
  letter-spacing: 0.10em; text-transform: uppercase;
}
.eyebrow-chip::before {
  content: ''; width: 6px; height: 6px;
  background: var(--primary); border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

/* ============================================
   10. TRUST BADGES
   ============================================ */
.trust-badge {
  display: inline-flex; align-items: center; gap: 0.375rem;
  padding: 0.375rem 0.875rem; border-radius: var(--radius-full);
  font-size: var(--label-sm); font-weight: 600;
  letter-spacing: 0.05em; text-transform: uppercase;
}
.trust-badge--teal { background: var(--authority-teal-light); color: #064E3B; }
.trust-badge--blue { background: rgba(9,76,178,0.10); color: var(--primary); }
.trust-badge--amber { background: var(--urgency-amber-bg); color: var(--urgency-amber); }
.trust-badge--navy { background: var(--primary); color: var(--on-primary); }

.trust-badge__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: currentColor; animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* ============================================
   11. STATS BAND
   ============================================ */
.stats-band {
  background: var(--on-surface); padding: 48px 0;
}
.stats-band .container {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 0;
}
.stat-item {
  padding: 0 40px; text-align: left;
  border-right: 1px solid rgba(255,255,255,0.10);
}
.stat-item:first-child { padding-left: 0; }
.stat-item:last-child { border-right: none; }
.stat-item .stat-num {
  font-size: 3.2rem; font-weight: 800; letter-spacing: -0.035em;
  color: white; line-height: 1; margin-bottom: 6px;
}
.stat-item .stat-num span { color: rgba(99,162,255,0.90); }
.stat-item .stat-label {
  font-size: 10px; font-weight: 600; letter-spacing: 0.10em;
  text-transform: uppercase; color: rgba(255,255,255,0.45);
}

/* ============================================
   12. LOGO SCROLLER
   ============================================ */
.logos-section { padding: 56px 0; background: var(--surface); overflow: hidden; }
.logos-eyebrow {
  font-size: 10px; font-weight: 700; letter-spacing: 0.16em;
  text-transform: uppercase; color: rgba(58,80,104,0.35);
  text-align: center; margin-bottom: 28px;
  max-width: var(--max-width); margin-left: auto; margin-right: auto;
  padding: 0 var(--space-lg);
}
.logos-track-wrapper {
  overflow: hidden; width: 100%;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
  mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
}
.logos-track {
  display: flex; gap: 72px; align-items: center;
  width: max-content; animation: scrollLeft 22s linear infinite;
}
.logos-track:hover { animation-play-state: paused; }
@keyframes scrollLeft {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.logo-item {
  font-family: var(--font-primary);
  font-size: 14px; font-weight: 700; letter-spacing: 0.02em;
  color: rgba(58,80,104,0.28); transition: color 0.3s;
  cursor: default; white-space: nowrap; flex-shrink: 0;
}
.logo-item:hover { color: var(--primary); }

/* ============================================
   13. METRIC DISPLAYS
   ============================================ */
.metric { display: flex; flex-direction: column; }
.metric__value {
  font-size: var(--headline-lg); font-weight: 800;
  color: var(--primary); line-height: 1.1;
}
.metric__value--blue { color: var(--primary); }
.metric__value--teal { color: var(--authority-teal); }
.metric__label {
  font-size: var(--label-sm); font-weight: 600;
  color: var(--on-surface-variant);
  letter-spacing: 0.06em; text-transform: uppercase; margin-top: 0.25rem;
}

/* ============================================
   14. FOOTER
   ============================================ */
.footer {
  background: var(--on-surface);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 32px;
}
.footer__grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl); margin-bottom: var(--space-2xl);
}
.footer__brand { max-width: 280px; }
.footer__brand-name {
  font-size: 16px; font-weight: 800;
  letter-spacing: -0.03em; text-transform: uppercase;
  color: #ffffff; margin-bottom: var(--space-sm);
}
.footer__brand-name span { color: rgba(99,162,255,0.90); }
.footer__brand-desc {
  font-size: var(--body-sm); line-height: 1.75;
  color: rgba(255,255,255,0.40);
}
.footer__heading {
  font-size: 10px; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: rgba(99,162,255,0.70);
  margin-bottom: 20px;
}
.footer__link {
  display: block; font-size: 12px; font-weight: 500;
  color: rgba(255,255,255,0.45); padding: 0.375rem 0;
  transition: color var(--duration-fast) var(--ease-smooth),
    transform var(--duration-fast) var(--ease-spring);
}
.footer__link:hover { color: white; transform: translateX(4px); }
.footer__link:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.footer__bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 11px; color: rgba(255,255,255,0.25);
}
.footer__bottom-links { display: flex; gap: 24px; }
.footer__bottom-links a { color: rgba(255,255,255,0.25); }
.footer__bottom-links a:hover { color: rgba(255,255,255,0.60); }
.footer__bottom-right {
  display: flex; align-items: center; gap: var(--space-md);
}
.footer__social { display: flex; gap: var(--space-sm); }
.footer__social a {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.6);
  transition: background var(--duration-fast), color var(--duration-fast),
    transform var(--duration-fast) var(--ease-spring);
}
.footer__social a:hover {
  background: var(--primary); color: #ffffff; transform: translateY(-2px);
}

/* ============================================
   15. ANIMATIONS
   ============================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.7s ease forwards; }
.fade-up-2 { animation: fadeUp 0.7s 0.12s ease both; }
.fade-up-3 { animation: fadeUp 0.7s 0.25s ease both; }
.fade-up-4 { animation: fadeUp 0.7s 0.38s ease both; }

/* Scroll reveal — content always visible, animation is enhancement only */
.animate-on-scroll {
  opacity: 1;
  transform: translateY(0);
  transition: opacity var(--duration-slow) var(--ease-smooth),
    transform var(--duration-slow) var(--ease-spring);
}

/* Stagger children */
.stagger-children .animate-on-scroll:nth-child(1) { transition-delay: 0ms; }
.stagger-children .animate-on-scroll:nth-child(2) { transition-delay: 100ms; }
.stagger-children .animate-on-scroll:nth-child(3) { transition-delay: 200ms; }
.stagger-children .animate-on-scroll:nth-child(4) { transition-delay: 300ms; }
.stagger-children .animate-on-scroll:nth-child(5) { transition-delay: 400ms; }
.stagger-children .animate-on-scroll:nth-child(6) { transition-delay: 500ms; }
.stagger-children .animate-on-scroll:nth-child(7) { transition-delay: 600ms; }
.stagger-children .animate-on-scroll:nth-child(8) { transition-delay: 700ms; }

/* Accessibility: respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  .fade-up, .fade-up-2, .fade-up-3, .fade-up-4 { animation: none; opacity: 1; }
}

/* ============================================
   16. RESPONSIVE BREAKPOINTS
   ============================================ */
@media (max-width: 1024px) {
  :root {
    --display-lg: 2.75rem; --display-md: 2.25rem;
    --display-sm: 2rem; --headline-lg: 1.75rem; --headline-md: 1.5rem;
  }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
  .stats-band .container { grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
  .stat-item { padding: 16px 0; border-right: none; }
  .stat-item .stat-num { font-size: 2.4rem; }
}

@media (max-width: 768px) {
  :root {
    --display-lg: 2.25rem; --display-md: 2rem; --display-sm: 1.75rem;
    --headline-lg: 1.5rem; --headline-md: 1.375rem;
    --nav-height: 64px;
  }
  .container { padding: 0 var(--space-md); }
  .section { padding: 64px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav__links, .nav__login { display: none; }
  .nav__hamburger { display: flex; }
  .footer__grid { grid-template-columns: 1fr; }
  .footer__bottom {
    flex-direction: column; gap: var(--space-md); text-align: center;
  }
  .stats-band .container { grid-template-columns: repeat(2, 1fr); }
  .stat-item .stat-num { font-size: 2rem; }
}

@media (max-width: 480px) {
  :root { --display-lg: 2rem; --display-md: 1.75rem; --display-sm: 1.5rem; }
  .container { padding: 0 var(--space-sm); }
  .nav__actions { display: none; }
  .stats-band .container { grid-template-columns: 1fr; }
}

/* Skip to main content (accessibility) */
.skip-link {
  position: absolute; top: -100%; left: 16px;
  background: var(--primary); color: white;
  padding: 0.75rem 1.5rem; border-radius: var(--radius-sm);
  z-index: 9999; transition: top var(--duration-fast) var(--ease-smooth);
}
.skip-link:focus { top: 16px; }