:root {
  /* Color Palette - Deep Corporate Blue & Sharp Tech Accents */
  --color-primary: #0A0F1E;
  --color-accent: #00F0FF;
  --color-accent-soft: rgba(0, 240, 255, 0.1);
  --color-surface: #FFFFFF;
  --color-surface-muted: #F8FAFC;
  --color-text: #1E293B;
  --color-text-muted: #64748B;
  --color-border: #E2E8F0;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 48px;
  --space-2xl: 80px;
  --space-3xl: 120px;
  
  /* Typography */
  --font-display: 'Inter', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-primary);
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 8vw, 6rem);
}

section {
  margin-top: var(--space-3xl);
  position: relative;
}

main > :first-child {
  margin-top: 0;
}

/* Navigation */
.nav {
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -1px;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-logo span {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
}

.nav-link {
  font-weight: 500;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

/* Hero Section */
.hero {
  padding: var(--space-3xl) 0;
  background: var(--color-primary);
  color: white;
  min-height: 80vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero h1 {
  color: white;
  font-size: clamp(2.5rem, 6vw, 5rem);
  margin-bottom: var(--space-lg);
}

.hero-tagline {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--color-text-muted);
  max-width: 700px;
  margin-bottom: var(--space-xl);
}

.hero-accent {
  color: var(--color-accent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 1rem 2.5rem;
  font-weight: 700;
  border-radius: 4px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 240, 255, 0.3);
}

.btn-outline {
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
  margin-left: var(--space-md);
}

/* Service Cards */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-lg);
}

.service-card {
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
  transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 400px;
  background: white;
}

.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-10px);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: var(--color-accent-soft);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.service-card h3 {
  font-size: 1.75rem;
  margin-bottom: var(--space-md);
}

.service-card p {
  color: var(--color-text-muted);
}

/* Stats/Data Section */
.stats-banner {
  background: var(--color-surface-muted);
  padding: var(--space-2xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.stat-item h2 {
  font-size: 3.5rem;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.stat-item p {
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

/* Feature/Visual Split */
.split-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-3xl);
}

.split-content h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-lg);
}

.split-visual {
  position: relative;
  height: 500px;
  background: var(--color-surface-muted);
  border-radius: 20px;
  overflow: hidden;
}

.placeholder-image {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #0A0F1E 0%, #1E293B 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.1);
  font-weight: 800;
  font-size: 2rem;
}

/* Client Logo Cloud */
.logo-cloud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  opacity: 0.5;
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  filter: grayscale(1);
}

/* Footer */
footer {
  margin-top: var(--space-3xl);
  background: var(--color-primary);
  color: white;
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-logo {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: var(--space-lg);
}

.footer-logo span {
  color: var(--color-accent);
}

.footer-col h4 {
  color: white;
  margin-bottom: var(--space-lg);
  font-size: 1rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: var(--space-sm);
}

.footer-col a {
  color: var(--color-text-muted);
}

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

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

/* Case Study Cards */
.case-studies-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.case-card {
  position: relative;
  height: 600px;
  overflow: hidden;
  border-radius: 8px;
}

.case-card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-2xl);
  background: linear-gradient(transparent, rgba(10, 15, 30, 0.9));
  color: white;
  z-index: 2;
}

.case-card-category {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.case-card h3 {
  color: white;
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

/* Utility */
.section-label {
  display: block;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

@media (max-width: 1024px) {
  .split-section {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .case-studies-grid {
    grid-template-columns: 1fr;
  }
}