:root {
  --primary: #1a365d;
  --secondary: #4a5568;
  --background: #f7fafc;
  --footer-bg: #2d3748;
  --button: #2b6cb0;
  --section-bg-1: #e2e8f0;
  --section-bg-2: #edf2f7;
  --section-bg-3: #ebf8ff;
  --font-sans: 'Helvetica Neue', Arial, sans-serif;
  --transition: all 0.3s ease;
}

body {
  font-family: var(--font-sans);
  line-height: 1.7;
  color: var(--secondary);
  background-color: var(--background);
  margin: 0;
  padding: 0;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--primary);
  font-weight: 600;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

h1 {
  font-size: 2.5rem;
  line-height: 1.2;
}

h2 {
  font-size: 2rem;
}

p {
  margin-bottom: 1.5rem;
  max-width: 65ch;
}

a {
  color: var(--button);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--button);
  color: white;
  border-radius: 0.25rem;
  font-weight: 500;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn:hover {
  background-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.section {
  padding: 4rem 0;
}

.section-bg-1 {
  background-color: var(--section-bg-1);
}

.section-bg-2 {
  background-color: var(--section-bg-2);
}

.section-bg-3 {
  background-color: var(--section-bg-3);
}

.card {
  background: white;
  border-radius: 0.5rem;
  padding: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.card:hover {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transform: translateY(-4px);
}

footer {
  background-color: var(--footer-bg);
  color: white;
  padding: 3rem 0;
}

footer a {
  color: white;
}

footer a:hover {
  color: #a0aec0;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .section {
    padding: 2.5rem 0;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}