:root {
  --color-primary-900: #0A1628;
  --color-primary-700: #1E3A5F;
  --color-primary-500: #2E5984;
  --color-primary-300: #5B8AB8;
  --color-primary-100: #E8F1F8;
  --color-accent-700: #D84315;
  --color-accent-500: #F4511E;
  --color-neutral-900: #1A1A1A;
  --color-neutral-700: #404040;
  --color-neutral-500: #737373;
  --color-neutral-300: #D4D4D4;
  --color-neutral-100: #F5F5F5;
  --color-neutral-50: #FAFAFA;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --font-display: 'Inter', sans-serif;
  --text-h1: 4.5rem;
  --text-h2: 3rem;
  --text-h3: 2rem;
  --text-body-lg: 1.25rem;
  --text-body: 1rem;
  --text-small: 0.875rem;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --line-height-tight: 1.1;
  --line-height-snug: 1.2;
  --line-height-normal: 1.6;
  --shadow-1: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-2: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.05);
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --transition-base: 0.3s ease;
}

@media (max-width: 768px) {
  :root {
    --text-h1: 3rem;
    --text-h2: 2rem;
    --text-h3: 1.5rem;
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-display);
  font-size: var(--text-body);
  line-height: var(--line-height-normal);
  color: var(--color-neutral-900);
  background: white;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-weight: var(--weight-semibold);
  color: var(--color-primary-900);
  margin-bottom: var(--space-md);
}

h1 {
  font-size: var(--text-h1);
  font-weight: var(--weight-bold);
  letter-spacing: -0.02em;
  line-height: var(--line-height-tight);
}

h2 {
  font-size: var(--text-h2);
  letter-spacing: -0.01em;
  line-height: var(--line-height-snug);
}

h3 {
  font-size: var(--text-h3);
  letter-spacing: -0.01em;
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-neutral-700);
}

.subtitle {
  font-size: var(--text-body-lg);
  color: var(--color-neutral-700);
  max-width: 45rem;
  margin: 0 auto var(--space-xl);
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

@media (max-width: 768px) {
  .container { padding: 0 var(--space-md); }
}

/* ============================================
   NAVIGATION - RESPONSIVE
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-neutral-200);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100px;
}

.navbar strong {
  font-size: 1.125rem;
  color: var(--color-primary-900);
  font-weight: var(--weight-semibold);
}

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

.navbar a {
  text-decoration: none;
  color: var(--color-neutral-900);
  font-weight: var(--weight-medium);
  transition: var(--transition-base);
}

.navbar a:hover {
  color: var(--color-primary-500);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.75rem;
  cursor: pointer;
  color: var(--color-neutral-900);
  padding: var(--space-xs);
}

/* Mobile navigation */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    box-shadow: var(--shadow-2);
    display: none;
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .menu-toggle {
    display: block;
  }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-primary {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-accent-700);
  color: white;
  text-decoration: none;
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  transition: all var(--transition-base);
}

.btn-primary:hover {
  background: var(--color-accent-500);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background: transparent;
  color: var(--color-primary-500);
  text-decoration: none;
  font-weight: var(--weight-semibold);
  border: 2px solid var(--color-primary-300);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.btn-secondary:hover {
  background: var(--color-primary-100);
  border-color: var(--color-primary-500);
}

section { padding: var(--space-3xl) 0; }

@media (max-width: 768px) {
  section { padding: var(--space-2xl) 0; }
}

.hero {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: calc(80px + var(--space-3xl));
  background: linear-gradient(135deg, var(--color-primary-100) 0%, var(--color-neutral-50) 100%);
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding-top: calc(80px + var(--space-2xl));
    padding-bottom: var(--space-2xl);
  }
}

.section-dark {
  background: var(--color-primary-900);
  color: white;
}

.section-dark h2,
.section-dark h3 {
  color: white;
}

.section-dark p {
  color: rgba(255, 255, 255, 0.85);
}

.section-header {
  text-align: center;
  max-width: 50rem;
  margin: 0 auto var(--space-2xl);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   CARDS - FIX: Color reset for dark sections
   ============================================ */
.card {
  background: white;
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-neutral-200);
  box-shadow: var(--shadow-1);
  transition: all var(--transition-base);
  text-align: center;
}

.card:hover {
  border-color: var(--color-primary-300);
  box-shadow: var(--shadow-2);
  transform: translateY(-4px);
}

/* CRITICAL FIX: Reset text color in cards */
.card h3 {
  color: var(--color-primary-900);
  margin-bottom: var(--space-sm);
}

.card p {
  color: var(--color-neutral-700);
  margin-bottom: var(--space-md);
}

.text-center { text-align: center; }

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}