:root {
  --primary: #2c3e50;
  --secondary: #3498db;
  --background: #f8f9fa;
  --footer-bg: #2c3e50;
  --button: #3498db;
  --section-bg-1: #ffffff;
  --section-bg-2: #e9ecef;
  --section-bg-3: #dee2e6;
  --text-primary: #212529;
  --text-secondary: #495057;
  --text-light: #f8f9fa;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
  background-color: var(--background);
  color: var(--text-primary);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--primary);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.05em;
}

h2 {
  font-size: 2rem;
  letter-spacing: -0.03em;
}

p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  max-width: 65ch;
}

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

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

.btn {
  display: inline-block;
  background-color: var(--button);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  border: none;
  cursor: pointer;
}

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

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.section {
  padding: 5rem 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-color: white;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}

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

.navbar {
  background-color: var(--primary);
  color: var(--text-light);
  padding: 1rem 0;
}

.navbar a {
  color: var(--text-light);
}

.navbar a:hover {
  color: var(--secondary);
  text-decoration: none;
}

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

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

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

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .section {
    padding: 3rem 0;
  }
}

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

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