body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(135deg, #0a0a2a, #121212);
  color: #ffffff;
  line-height: 1.6;
}

header {
  position: relative;
  height: 400px;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(66, 103, 178, 0.3), transparent),
              radial-gradient(circle, rgba(102, 126, 234, 0.2), transparent),
              linear-gradient(45deg, #1e1e3e, #2c2c54);
  animation: starfield 15s linear infinite;
  transform-origin: center;
}

@keyframes starfield {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

header h1 {
  position: relative;
  text-align: center;
  font-size: 48px;
  font-weight: bold;
  padding-top: 100px;
  color: #ffffff;
  text-shadow: 0 0 20px #667eea;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

section {
  margin-bottom: 40px;
}

.card {
  background: #1e1e1e;
  border: 1px solid #333;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  padding: 20px;
  margin: 10px;
  transition: transform 0.3s ease;
}

.card:hover {
  transform: scale(1.05);
}

.card img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
}

pre {
  background: #2c2c54;
  padding: 15px;
  border-radius: 5px;
  overflow-x: auto;
}

code {
  color: #4a90e2;
  font-family: monospace;
}

.button-glow {
  position: relative;
  display: inline-block;
  overflow: hidden;
}

.button-glow::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 150%;
  height: 150%;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  opacity: 0;
  transition: all 0.5s ease;
}

.button-glow:hover::after {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

th, td {
  border: 1px solid #444;
  padding: 10px;
  text-align: left;
}

th {
  background-color: #2c2c54;
}

@media (max-width: 768px) {
  header h1 {
    font-size: 36px;
    padding-top: 50px;
  }

  .card {
    margin: 10px 0;
  }

  table {
    display: block;
    overflow-x: auto;
  }
}

@media (max-width: 480px) {
  header h1 {
    font-size: 28px;
    padding-top: 30px;
  }

  pre {
    font-size: 14px;
  }
}