body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

.trollage {
  background: linear-gradient(90deg, red, orange, yellow, green, blue, indigo, violet);
  color: white;
  font-weight: bold;
  padding: 10px;
  animation: rainbow 3s infinite;
}

@keyframes rainbow {
  0% { filter: hue-rotate(0deg); }
  100% { filter: hue-rotate(360deg); }
}

footer {
  background-color: #ffffff;
  color: black;
  text-align: center;
  padding: 10px;
  position: fixed;
  bottom: 0;
  width: 100%;
}