body {
  font-family: sans-serif;
  padding: 20px;
  background: #f4f4f4;
  color: #222;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
}

.select-btn {
  width: 100%;
  padding: 15px;
  font-size: 18px;
  margin-bottom: 20px;
  background: #fff;
  border: 2px solid #222;
  border-radius: 8px;
  cursor: pointer;
}

.controls {
  margin-top: 20px;
}

#volume {
  width: 100%;
  margin-top: 10px;
}

.volume-info {
  margin-top: 10px;
  font-size: 14px;
  color: #555;
  display: none;
}

.stop {
  margin-top: 20px;
  padding: 15px;
  width: 100%;
  background: #d00000;
  color: white;
  font-size: 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

.stop:hover {
  background: #a00000;
}

#now-playing {
  margin-top: 15px;
  font-weight: bold;
}

/* Overlay */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 999;
}

.hidden {
  display: none;
}

.overlay-content {
  background: white;
  padding: 20px;
  width: 90%;
  max-width: 500px;
  border-radius: 10px;
  text-align: center;
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 15px;
  margin-top: 20px;
}

.grid button {
  padding: 20px;
  background: #eee;
  border: 2px solid #222;
  border-radius: 10px;
  font-size: 16px;
  cursor: pointer;
}

.close-btn {
  margin-top: 20px;
  padding: 10px 20px;
}