* {
  box-sizing: border-box;
}
body {
  font-family: "Segoe UI", Roboto, sans-serif;
  margin: 0;
  background: #111111;
  color: #e0e0e0;
}
header {
  background: linear-gradient(0deg, #5204aa, #23004b);
  color: #fff;
  padding: 40px 20px;
  text-align: center;
}
header h1 {
  margin: 0 0 24px 0;
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.5px;
}
header a {
  color: #fff;
  text-decoration: none;
  transition: opacity 0.2s ease;
}
header a:hover {
  opacity: 0.8;
}
@keyframes glow {
  0%, 100% {
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.4);
  }
  50% {
    text-shadow: 0 0 16px rgba(255, 255, 255, 0.8), 0 0 24px rgba(82, 4, 170, 0.6);
  }
}

header a[target="_blank"] {
  font-weight: 600;
  border-bottom: 2px solid rgba(255, 255, 255, 0.3);
  padding-bottom: 2px;
  cursor: pointer;
  animation: glow 2s ease-in-out infinite;
}