#levelSelect {
  text-align: center;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.5s ease-in;
}

#levelSelect.ready {
  opacity: 1;
}

#levelSelect h1 {
  color: #fff;
  font-size: 2.5em;
  margin-bottom: 30px;
  text-shadow: 0 0 10px rgba(0, 150, 255, 0.8);
}

.card-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.level-card {
  background: rgba(20, 20, 40, 0.9);
  border: 2px solid rgba(0, 150, 255, 0.5);
  border-radius: 12px;
  padding: 30px 20px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.level-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 200, 255, 0.8);
  box-shadow: 0 8px 16px rgba(0, 150, 255, 0.4);
}

.level-card h2 {
  color: #00d4ff;
  font-size: 1.8em;
  margin-bottom: 15px;
  text-transform: uppercase;
}

.level-card p {
  color: #ccc;
  font-size: 1em;
  line-height: 1.6;
  margin-bottom: 20px;
  min-height: 50px;
}

.level-button {
  background: linear-gradient(135deg, #0066cc, #0099ff);
  color: white;
  border: none;
  padding: 12px 30px;
  font-size: 1.1em;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.level-button:hover {
  background: linear-gradient(135deg, #0088ff, #00bbff);
  box-shadow: 0 4px 12px rgba(0, 150, 255, 0.6);
  transform: scale(1.05);
}

.level-button:active {
  transform: scale(0.98);
}

@media (max-width: 768px) {
  .card-container {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  #levelSelect h1 {
    font-size: 2em;
  }
}