:root {
  /* Modern Neutral Palette */
  --color-bg: #f8f9fa;
  --color-text-main: #1a1a1a;
  --color-text-muted: #666666;
  --color-accent: #0047ab; /* Professional Blue */
  --color-white: #ffffff;
  --color-border: #e0e0e0;
  --color-overlay: rgba(0, 0, 0, 0.4);
  
  /* Spacing System */
  --space-unit: 1rem;
  --space-sm: 0.5rem;
  --space-md: 1.5rem;
  --space-lg: 3rem;
  --space-xl: 6rem;
  
  /* UI Elements */
  --radius-sm: 4px;
  --radius-md: 12px;
  --transition-smooth: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* Base Styles */
body {
  background-color: var(--color-bg);
  color: var(--color-text-main);
  font-family: 'Inter', 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Typography Upgrade */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

h1 { font-size: 4rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }

/* Layout Refinement */
.container {
  max-width: 1280px;
  padding: 0 var(--space-md);
  margin: 0 auto;
}

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

/* Modern Navigation */
.navbar {
  padding: var(--space-md) 0;
  background: transparent;
  transition: var(--transition-smooth);
}

.brand-logo {
  width: 120px;
  transition: var(--transition-smooth);
}

/* Modern Card Style */
.card-link {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
  transition: var(--transition-smooth);
  border: 1px solid transparent;
}

.card-link:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  border-color: var(--color-accent);
}

.image-wrapper {
  border-radius: var(--radius-md);
  overflow: hidden;
}

/* Professional Buttons */
.button {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: var(--transition-smooth);
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
}

.button:hover {
  background: #003380;
  transform: translateY(-2px);
  box-shadow: 0 8px 15px rgba(0,71,171,0.3);
}

.button.white-button {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255,255,255,0.4);
  backdrop-filter: blur(4px);
}

.button.white-button:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--color-white);
}

/* Sidebar Navigation Links */
.nav-link {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 2.5rem;
  line-height: 1.2;
  margin-bottom: 0.5rem;
  transition: var(--transition-smooth);
}

.nav-link:hover {
  color: var(--color-accent) !important;
  padding-left: 1rem;
}

.big-paragraph {
  font-family: 'Inter', sans-serif;
  font-weight: 500;
}

.caption {
  font-family: 'Montserrat', sans-serif;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--color-accent);
}

/* Service Grid Refinement */
.service-item {
  padding: var(--space-md);
  background: var(--color-white);
  border-radius: var(--radius-md);
  transition: var(--transition-smooth);
}

.service-item img {
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
}

/* Footer Upgrade */
.footer-section {
  background: #111;
  color: #888;
  padding: var(--space-xl) 0;
}

.footer-section h3, .footer-section .bold-text {
  color: var(--color-white);
}

.footer-links a {
  color: #666;
  transition: var(--color-white);
}

.footer-links a:hover {
  color: var(--color-white);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 1.8rem; }
  .section { padding: var(--space-lg) 0; }
}