/* ===================================
   VAULT WEBSITE - DESIGN SYSTEM
   Component-based CSS Architecture
   =================================== */

/* CSS VARIABLES - Design Tokens */
:root {
  /* Colors - Navy Blue Theme */
  --color-primary: #0A1F44;
  --color-primary-dark: #05132A;
  --color-primary-light: #1A365D;
  --color-accent: #425b78;
  --color-accent-light: #7694a8;
  --color-white: #FFFFFF;
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-700: #374151;
  --color-gray-900: #111827;

  /* Typography */
  --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  --spacing-5xl: 8rem;

  /* Layout */
  --container-max-width: 1280px;
  --container-padding: var(--spacing-xl);
  --header-height: 80px;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Premium Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-cyber: linear-gradient(135deg, #0A1F44 0%, #1A365D 50%, #3B82F6 100%);
  --gradient-accent: linear-gradient(135deg, #425b78 0%, #7694a8 50%, #93C5FD 100%);
  --gradient-success: linear-gradient(135deg, #10B981 0%, #34D399 100%);
  --gradient-warm: linear-gradient(135deg, #F59E0B 0%, #F97316 50%, #EF4444 100%);
  --gradient-cool: linear-gradient(135deg, #425b78 0%, #7694a8 50%, #93C5FD 100%);
  --gradient-radial: radial-gradient(circle at top right, #425b78 0%, transparent 70%);
  --gradient-mesh: radial-gradient(at 0% 0%, hsla(253, 100%, 70%, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 0%, hsla(217, 100%, 70%, 0.15) 0px, transparent 50%),
    radial-gradient(at 100% 100%, hsla(142, 76%, 60%, 0.1) 0px, transparent 50%);

  /* Text Gradients */
  --text-gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --text-gradient-cyber: linear-gradient(90deg, #425b78 0%, #7694a8 50%, #93C5FD 100%);
  --text-gradient-accent: linear-gradient(135deg, #10B981 0%, #425b78 100%);

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-blur: blur(10px);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);

  /* Glow Effects */
  --glow-primary: 0 0 20px rgba(59, 130, 246, 0.3);
  --glow-accent: 0 0 30px rgba(59, 130, 246, 0.4);
  --glow-success: 0 0 20px rgba(16, 185, 129, 0.3);

  /* Advanced Shadows with Color */
  --shadow-colored-sm: 0 2px 8px rgba(59, 130, 246, 0.1);
  --shadow-colored-md: 0 4px 16px rgba(59, 130, 246, 0.15);
  --shadow-colored-lg: 0 8px 32px rgba(59, 130, 246, 0.2);
  --shadow-colored-xl: 0 12px 48px rgba(59, 130, 246, 0.25);
}

/* ============================================
   DARK MODE VARIABLES
   ============================================ */
body.dark-mode {
  /* Background Colors */
  --color-white: #111827;
  --color-gray-50: #1F2937;
  --color-gray-100: #374151;
  --color-primary-dark: #0A0F1A;

  /* Text Colors */
  --color-primary: #F3F4F6;
  --color-gray-700: #D1D5DB;
  --color-gray-900: #F9FAFB;
  --color-gray-300: #9CA3AF;

  /* Accent */
  --color-accent: #60A5FA;
  --color-accent-light: #93C5FD;

  /* Shadows for dark mode */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
}

/* Smooth transition for theme changes */
body {
  transition: background-color var(--transition-base), color var(--transition-base);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  transition: background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--color-gray-900);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* TYPOGRAPHY COMPONENTS */
.heading-primary {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.1;
  color: var(--color-primary);
}

.heading-secondary {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-primary);
}

.heading-tertiary {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  color: var(--color-primary);
}

.text-large {
  font-size: var(--font-size-xl);
  line-height: 1.6;
  color: var(--color-gray-700);
}

.text-body {
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-gray-700);
}

.text-small {
  font-size: var(--font-size-sm);
  line-height: 1.5;
  color: var(--color-gray-700);
}

/* LAYOUT COMPONENTS */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  width: 100%;
}

.section {
  padding: var(--spacing-5xl) 0;
}

.section--dark {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.section--gray {
  background-color: var(--color-gray-50);
}

/* CARD COMPONENTS */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base), transform var(--transition-base);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(59, 130, 246, 0.1);
}

/* Premium Card Variants */
.card--glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.card--gradient-border {
  background: var(--color-white);
  border: 2px solid transparent;
  background-clip: padding-box;
  position: relative;
}

.card--gradient-border::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  padding: 2px;
  background: var(--gradient-accent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-colored-lg);
  border-color: rgba(59, 130, 246, 0.3);
}

.card--3d {
  transform-style: preserve-3d;
  perspective: 1000px;
}

.card--3d:hover {
  transform: translateY(-12px) rotateX(2deg) rotateY(-2deg);
  box-shadow: var(--shadow-colored-xl);
}

.card__number {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.card__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.card__description {
  font-size: var(--font-size-base);
  color: var(--color-gray-700);
  line-height: 1.6;
}

.card__image {
  width: 100%;
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
}

/* Testimonial Card */
.card--testimonial {
  position: relative;
  overflow: hidden;
  min-height: 400px;
  display: flex;
  align-items: flex-end;
  padding: var(--spacing-2xl);
}

.card--testimonial::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(10, 31, 68, 0.9), rgba(10, 31, 68, 0.3));
  z-index: 1;
}

.card--testimonial__content {
  position: relative;
  z-index: 2;
  color: var(--color-white);
}

.card--testimonial__metric {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-extrabold);
  margin-bottom: var(--spacing-sm);
}

.card--testimonial__description {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
}

/* HEADER COMPONENT */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__logo {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-extrabold);
  color: var(--color-primary);
  text-decoration: none;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
}

.header__menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-2xl);
}

.header__link {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  text-decoration: none;
  transition: color var(--transition-base);
}

.header__link:hover {
  color: var(--color-accent);
}

.header__link.active {
  color: var(--color-accent);
  font-weight: var(--font-weight-semibold);
  position: relative;
}

.header__link.active::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
}

.header__menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.header__menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  transition: all var(--transition-base);
}

/* HERO COMPONENT */
.hero {
  padding-top: calc(var(--header-height) + var(--spacing-5xl));
  padding-bottom: var(--spacing-5xl);
  position: relative;
  overflow: hidden;
}

/* Hero Background Effects */
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: var(--gradient-radial);
  border-radius: 50%;
  opacity: 0.15;
  z-index: 0;
  animation: blob-float 20s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  opacity: 0.2;
  z-index: 0;
  animation: blob-float 15s ease-in-out infinite reverse;
}

.hero__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__text {
  z-index: 2;
}

.hero__title {
  font-size: var(--font-size-6xl);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.05;
  background: var(--text-gradient-cyber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-lg);
  animation: gradient-shift 3s ease infinite;
  background-size: 200% 200%;
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.6;
}

.hero__image {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-colored-xl);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.hero__image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-accent);
  opacity: 0.05;
  pointer-events: none;
}

/* LOGO CAROUSEL COMPONENT */
.logo-carousel {
  overflow: hidden;
  padding: var(--spacing-2xl) 0;
  background-color: transparent;
  position: relative;
}

.logo-carousel__track {
  display: flex;
  gap: var(--spacing-xl);
  animation: scroll 40s linear infinite;
  width: fit-content;
  will-change: transform;
}

.logo-carousel__item {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.7;
  transition: opacity var(--transition-base), transform var(--transition-base);
  width: 180px;
  height: 80px;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.logo-carousel__item img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: grayscale(100%) brightness(0.8);
  transition: filter var(--transition-base);
}

.logo-carousel__item:hover {
  opacity: 1;
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.logo-carousel__item:hover img {
  filter: grayscale(0%) brightness(1);
}

/* Dark mode adjustments */
body.dark-mode .logo-carousel__item {
  background-color: var(--color-gray-800);
  box-shadow: 0 1px 3px rgba(255, 255, 255, 0.1);
}

body.dark-mode .logo-carousel__item:hover {
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.15);
}

body.dark-mode .logo-carousel__item img {
  filter: grayscale(100%) brightness(1.2) invert(1);
}

body.dark-mode .logo-carousel__item:hover img {
  filter: grayscale(0%) brightness(1) invert(1);
}

@keyframes scroll {
  0% {
    transform: translateX(0);
  }

  100% {
    transform: translateX(-50%);
  }
}

/* GRID COMPONENTS */
.grid {
  display: grid;
  gap: var(--spacing-2xl);
}

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

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

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

/* FAQ COMPONENT */
.faq {
  max-width: 800px;
  margin: 0 auto;
}

.faq__item {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq__question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  background: none;
  border: none;
  font-family: var(--font-family);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-align: left;
  cursor: pointer;
  transition: background-color var(--transition-base);
}

.faq__question:hover {
  background-color: var(--color-gray-50);
}

.faq__icon {
  font-size: var(--font-size-xl);
  transition: transform var(--transition-base);
}

.faq__item.active .faq__icon {
  transform: rotate(45deg);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.faq__item.active .faq__answer {
  max-height: 500px;
}

.faq__answer-content {
  padding: 0 var(--spacing-xl) var(--spacing-lg);
  color: var(--color-gray-700);
  line-height: 1.6;
}

/* FOOTER COMPONENT */
.footer {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  padding: var(--spacing-4xl) 0 var(--spacing-2xl);
}

.footer__content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer__column h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
}

.footer__links {
  list-style: none;
}

.footer__link {
  color: var(--color-gray-300);
  text-decoration: none;
  font-size: var(--font-size-base);
  line-height: 2;
  transition: color var(--transition-base);
}

.footer__link:hover {
  color: var(--color-white);
}

.footer__bottom {
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: var(--color-gray-300);
  font-size: var(--font-size-sm);
}

/* ANIMATION UTILITIES */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Advanced Animation Classes */
.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

/* Continuous Animations */
.glow-pulse {
  animation: glow-pulse 2s ease-in-out infinite;
}

.float-animation {
  animation: float 3s ease-in-out infinite;
}

.gradient-shift {
  background-size: 200% 200%;
  animation: gradient-shift 3s ease infinite;
}

.shimmer {
  position: relative;
  overflow: hidden;
}

.shimmer::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg,
      transparent,
      rgba(255, 255, 255, 0.3),
      transparent);
  animation: shimmer 2s infinite;
}

/* Keyframe Animations */
@keyframes glow-pulse {

  0%,
  100% {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
  }

  50% {
    box-shadow: 0 0 40px rgba(59, 130, 246, 0.6);
  }
}

@keyframes float {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

@keyframes shimmer {
  0% {
    left: -100%;
  }

  100% {
    left: 100%;
  }
}

@keyframes blob-float {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  33% {
    transform: translate(30px, -50px) scale(1.1);
  }

  66% {
    transform: translate(-20px, 20px) scale(0.9);
  }
}

/* ============================================
   PREMIUM UTILITY CLASSES
   ============================================ */

/* Text Gradients */
.text-gradient {
  background: var(--text-gradient-cyber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

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

/* Premium Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
}

.badge--gradient {
  background: var(--gradient-accent);
  color: white;
  box-shadow: var(--shadow-colored-md);
}

.badge--glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  color: var(--color-primary);
}

.badge--glow {
  background: var(--gradient-success);
  color: white;
  box-shadow: var(--glow-success);
  animation: glow-pulse 2s ease-in-out infinite;
}

/* Decorative Elements */
.blob-decoration {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.3;
  pointer-events: none;
  z-index: -1;
}

.blob-decoration--primary {
  background: var(--gradient-accent);
}

.blob-decoration--success {
  background: var(--gradient-success);
}

.blob-decoration--warm {
  background: var(--gradient-warm);
}

/* Grid Pattern Overlay */
.grid-pattern {
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
}

/* Dots Pattern */
.dots-pattern {
  background-image: radial-gradient(circle, rgba(59, 130, 246, 0.1) 1px, transparent 1px);
  background-size: 20px 20px;
}

/* Section Overlays */
.section-overlay {
  position: relative;
  z-index: 1;
}

.section-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-mesh);
  opacity: 0.5;
  pointer-events: none;
  z-index: -1;
}

/* Highlight Effects */
.highlight-underline {
  position: relative;
  display: inline;
}

.highlight-underline::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 2px;
  opacity: 0.6;
}

/* Numbered Items with Style */
.numbered-item {
  position: relative;
  padding-left: 3rem;
}

.numbered-item::before {
  content: attr(data-number);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  color: white;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.875rem;
  box-shadow: var(--shadow-colored-md);
}

/* Stats/Metrics Display */
.metric-display {
  text-align: center;
  padding: var(--spacing-xl);
}

.metric-display__number {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-extrabold);
  background: var(--text-gradient-cyber);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.metric-display__label {
  font-size: var(--font-size-base);
  color: var(--color-gray-700);
  font-weight: var(--font-weight-medium);
}

/* Glow Box */
.glow-box {
  box-shadow: var(--shadow-colored-lg), var(--glow-accent);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* Icon Containers */
.icon-wrapper {
  width: 4rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  border-radius: var(--radius-xl);
  font-size: 2rem;
  box-shadow: var(--shadow-colored-md);
  margin-bottom: var(--spacing-md);
}

.icon-wrapper--glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
}

/* RESPONSIVE BREAKPOINTS */
@media (max-width: 1024px) {
  :root {
    --font-size-6xl: 3rem;
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --spacing-5xl: 6rem;
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero__content {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  :root {
    --font-size-6xl: 2.5rem;
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --spacing-4xl: 4rem;
    --spacing-5xl: 4rem;
    --container-padding: var(--spacing-md);
  }

  .header__menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .header__menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .header__menu-toggle {
    display: flex;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .section {
    padding: var(--spacing-4xl) 0;
  }

  .footer__content {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   TABS NAVIGATION
   ============================================ */

.tabs-nav {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 3rem 0;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 1rem 2.5rem;
  background: var(--color-white);
  border: 2px solid var(--color-gray-200);
  border-radius: 0.75rem;
  font-size: 1.125rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--color-text);
  position: relative;
  overflow: hidden;
  /* Create new stacking context */
  isolation: isolate;
}

.tab-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.3s;
  /* Place behind text */
  z-index: -1;
}

.tab-btn.active {
  border-color: transparent;
  color: var(--color-white);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.3), 0 4px 8px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.tab-btn.active::before {
  opacity: 1;
}

.tab-btn:hover:not(.active) {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.tab-btn:active {
  transform: translateY(0);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeInTab 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeInTab {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

body.dark-mode .tab-btn {
  background: var(--color-gray-800);
  border-color: var(--color-gray-700);
  color: var(--color-gray-100);
}

body.dark-mode .tab-btn.active {
  color: var(--color-white);
}

body.dark-mode .tab-btn:hover:not(.active) {
  border-color: var(--color-accent);
  background: var(--color-gray-700);
}

@media (max-width: 768px) {
  .tabs-nav {
    gap: 0.75rem;
    margin: 2rem 0;
  }

  .tab-btn {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
  }
}