body {
  margin: 0;
  font-family: 'Orbitron', sans-serif;
  background-color: #0f0f12;
  color: #00e5ff;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background-color: #111;
  box-shadow: 0 0 20px #00e5ff33;
}

header img.logo {
  width: 60px;
  height: auto;
  filter: drop-shadow(0 0 8px #00e5ff);
}

nav a, .btn {
  color: #00e5ff;
  text-decoration: none;
  background: #111;
  border: 1px solid #00e5ff;
  padding: 8px 16px;
  border-radius: 6px;
  transition: 0.2s;
}

nav a:hover, .btn:hover {
  background-color: #00e5ff10;
}