:root {
  --primary-color: #2E7D32;
  --secondary-color: #4CAF50;
  --accent-color: #81C784;
  --text-color: #333;
  --background-color: #f5f5f5;
  --card-background: #fff;
  --youtube-red: #FF0000;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
}

header {
  background-color: white;
  padding: 1rem;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.logo {
  margin-bottom: 1rem;
}

.logo img {
  max-width: 200px;
  height: auto;
  transition: transform 0.3s ease;
}

.logo img:hover {
  transform: scale(1.05);
}

h1 {
  color: var(--primary-color);
  font-size: 2rem;
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

h1:hover {
  transform: scale(1.02);
  color: var(--secondary-color);
}

h2 {
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.3s ease;
}

h2:hover {
  transform: scale(1.02);
  color: var(--secondary-color);
}

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

.cards-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.card {
  background-color: var(--card-background);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  transition: transform 0.3s ease;
  animation: fadeIn 0.5s ease-out forwards;
}

.card:hover {
  transform: translateY(-5px);
}

.card h3 {
  color: var(--secondary-color);
  margin-bottom: 1rem;
  font-size: 1.3rem;
  transition: font-size 0.3s ease;
}

.card h3:hover {
  transform: scale(1.02);
  color: var(--secondary-color);
}

.card p {
  margin-bottom: 1rem;
  color: #666;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--primary-color);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  text-decoration: none;
  transition: background-color 0.3s ease;
}

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

.btn i {
  font-size: 1.2rem;
}

/* 
.btn i.fa-youtube {
  color: var(--youtube-red);
}

.btn:hover i.fa-youtube {
  color: white;
}
*/

footer {
  background-color: var(--primary-color);
  color: white;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}

@media (max-width: 768px) {
  .cards-container {
    grid-template-columns: 1fr;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }

  .card h3 {
    font-size: 1.2rem;
  }
  
  .category {
    padding: 1rem;
  }
}

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

.card:nth-child(2) {
  animation-delay: 0.1s;
}

.card:nth-child(3) {
  animation-delay: 0.2s;
}

.card:nth-child(4) {
  animation-delay: 0.3s;
}