body {
  margin: 0;
  font-family: 'Open Sans', sans-serif;
  line-height: 1.6;
  color: #333;
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  overflow-x: hidden;
}

header {
  text-align: center;
  padding: 50px 20px;
  background: radial-gradient(circle, rgba(13, 110, 253, 0.8), transparent);
  color: white;
  position: relative;
  overflow: hidden;
}

header h1 {
  font-family: 'Roboto', sans-serif;
  font-size: 3em;
  font-weight: bold;
  margin: 0;
  animation: glow 5s infinite alternate;
}

@keyframes glow {
  0% { text-shadow: 0 0 10px #0D6EFD, 0 0 20px #0D6EFD; }
  100% { text-shadow: 0 0 20px #FFC107, 0 0 30px #FFC107; }
}

header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 193, 7, 0.5), transparent);
  transform: translate(-50%, -50%) rotate(45deg);
  animation: rotate 10s linear infinite;
}

@keyframes rotate {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  padding: 20px;
}

.card {
  background: rgba(13, 110, 253, 0.2);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  width: calc(33% - 20px);
  margin: 10px;
  padding: 20px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.card img {
  width: 100%;
  border-radius: 10px;
  margin-bottom: 10px;
}

.card h3 {
  font-family: 'Roboto', sans-serif;
  color: #0D6EFD;
  margin-top: 0;
}

.content {
  padding: 20px;
  max-width: 1200px;
  margin: auto;
}

.content h2 {
  font-family: 'Roboto', sans-serif;
  color: #0D6EFD;
  border-bottom: 2px solid #FFC107;
  padding-bottom: 10px;
}

.content pre {
  background: rgba(255, 255, 255, 0.8);
  padding: 15px;
  border-radius: 10px;
  overflow-x: auto;
}

.loader {
  border: 4px solid #f3f3f3;
  border-top: 4px solid #0D6EFD;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  animation: spin 1s linear infinite;
  margin: 20px auto;
  display: block;
}

@media (max-width: 1024px) {
  .card { width: calc(50% - 20px); }
}

@media (max-width: 768px) {
  .card { width: 100%; }
  header h1 { font-size: 2em; }
}