/* Modern Reset & Variables */
:root {
  --primary-color: #0d47a1; /* Deep Academic Blue */
  --secondary-color: #1976d2; /* Brighter Blue */
  --accent-color: #fdd835; /* Gold/Yellow for highlights */
  --text-dark: #1a202c;
  --text-light: #4a5568;
  --bg-light: #f7fafc;
  --white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
}

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

/* Typography */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Navigation */
header {
  background-color: var(--white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  gap: 30px;
  list-style: none;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-dark);
}

.nav-links a:hover {
  color: var(--secondary-color);
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 10px 24px;
  border-radius: 6px;
  font-weight: 600;
}

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

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--white);
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 40px;
  opacity: 0.9;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Stats Section */
.stats {
  padding: 40px 0;
  background-color: var(--white);
  margin-top: -30px;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  display: flex;
  justify-content: space-around;
  text-align: center;
  position: relative;
  z-index: 10;
}

.stat-item h3 {
  font-size: 2rem;
  color: var(--primary-color);
}

.stat-item p {
  color: var(--text-light);
}

/* Content Sections */
.section {
  padding: 60px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2.5rem;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.section-title p {
  color: var(--text-light);
}

/* Cards Grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.card {
  background: var(--white);
  padding: 30px;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid #e2e8f0;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--primary-color);
}

.card p {
  color: var(--text-light);
  margin-bottom: 20px;
}

.card-link {
  color: var(--secondary-color);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

/* Footer */
footer {
  background-color: var(--text-dark);
  color: #a0aec0;
  padding: 60px 0 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: var(--white);
  margin-bottom: 20px;
  font-size: 1.2rem;
}

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

.footer-col ul li {
  margin-bottom: 10px;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #2d3748;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .nav-links {
    display: none; /* Simple hiding for first iteration, can add mobile menu later if requested */
  }
  
  .stats {
    flex-direction: column;
    gap: 30px;
    margin-top: 20px;
  }
}