body {
  background-image: url('videos/Weather.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  transition: background 0.5s ease;
}

.fade-in {
  animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.tab {
  display: inline-block;
  padding: 0.5rem 1rem;
  margin: 0.25rem;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.3s;
}

.tab:hover {
  background: rgba(0, 0, 0, 0.1);
}

.tab.active {
  background: rgba(59, 130, 246, 0.8);
  color: white;
}

.dark {
  background-color: #111827;
  color: #e5e7eb;
}