body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #111;
  color: #fff;
  text-align: center;
}
.container {
  padding: 20px;
}
.mood-buttons button,
.custom-playlist button,
.controls button {
  margin: 5px;
  padding: 10px 20px;
  background-color: #222;
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}
input[type="text"] {
  padding: 10px;
  width: 70%;
  max-width: 400px;
  margin: 10px;
  border-radius: 5px;
  border: 1px solid #444;
}
footer {
  margin-top: 40px;
  font-size: 0.9em;
  color: #666;
}