@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
@keyframes equalizer {
  0% { transform: scaleY(0.3); }
  100% { transform: scaleY(1); }
}
.volume-slider {
  -webkit-appearance: none;
  height: 6px;
  border-radius: 5px;
  background: #e5e7eb;
  outline: none;
}
.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #3b82f6;
  cursor: pointer;
}
.wave-bar {
  width: 3px;
  height: 10px;
  background: #3b82f6;
  border-radius: 5px;
  transform-origin: bottom;
}
.station-card.active {
  background-color: rgba(59, 130, 246, 0.2);
}
.sidebar {
  transform: translateX(-100%);
  transition: transform 0.3s ease-out;
}
.sidebar.open {
  transform: translateX(0);
}
.overlay {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.overlay.open {
  opacity: 1;
  visibility: visible;
}
@media (min-width: 1024px) {
  main {
    max-width: 600px;
    margin: auto;
  }
}
#instructions-dialog {
  animation: fadeInUp 0.5s ease-out;
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translate(-50%, -60%);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}