:root {
  --primary: #2C3E50;
  --secondary: #3498DB;
  --background: #F8F9FA;
  --footer-bg: #212529;
  --button: #3498DB;
  --section-1: #E9ECEF;
  --section-2: #DEE2E6;
  --section-3: #CED4DA;
  --text-primary: #212529;
  --text-secondary: #495057;
  --text-light: #F8F9FA;
  --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);
  --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, 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;
}

h3 {
  font-size: 1.5rem;
}

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;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
  border: none;
  cursor: pointer;
}

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

.btn-secondary {
  background-color: transparent;
  color: var(--button);
  border: 2px solid var(--button);
}

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

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

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

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

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

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

.navbar {
  background-color: white;
  box-shadow: var(--shadow-sm);
}

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

.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;
  }
  
  .btn {
    padding: 0.625rem 1.25rem;
  }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

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