:root {
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
}

body {
  padding: 0;
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg-gradient);
  min-height: 100vh;
}

header {
  background: var(--primary);
  color: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-md);
}

.logo {
  font-weight: 700;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

main {
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  border: none;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card h1 {
  font-size: 1.25rem;
  margin: 0 0 0.5rem 0;
  color: #1f2937;
}

.card p {
  color: #6b7280;
  font-size: 0.95rem;
  line-height: 1.5;
  margin: 0.5rem 0;
}

.card-icon {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

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

@media (max-width: 768px) {
  main {
    padding: 1rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
}