body {
  background: #111;
  color: #fff;
  font-family: 'Segoe UI', Arial, sans-serif;
  margin: 0;
  min-height: 100vh;
}

.container {
  max-width: 400px;
  margin: 5vh auto;
  background: rgba(30, 30, 40, 0.95);
  border-radius: 16px;
  box-shadow: 0 8px 32px #000a;
  padding: 2rem 1.5rem 1.5rem 1.5rem;
  text-align: center;
}

h1 {
  margin-bottom: 2rem;
  font-size: 2rem;
  letter-spacing: 1px;
}

.controls {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: #b39ddb;
}

input[type="range"] {
  width: 100%;
  accent-color: #7c4dff;
}

select {
  width: 100%;
  padding: 0.5rem;
  border-radius: 8px;
  border: 1px solid #444;
  background: #222;
  color: #fff;
  font-size: 1rem;
}

button {
  padding: 0.7rem 1.5rem;
  margin: 0 0.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  background: #7c4dff;
  color: #fff;
  cursor: pointer;
  transition: background 0.2s;
}

button:disabled {
  background: #444;
  cursor: not-allowed;
}

button#stopButton {
  background: #e53935;
}

.status {
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 500;
  display: inline-block;
}

.status.playing {
  background: #388e3c33;
  color: #81c784;
  border: 1px solid #388e3c;
}

.status.stopped {
  background: #61616133;
  color: #bdbdbd;
  border: 1px solid #616161;
}

.error {
  margin-top: 1rem;
  color: #ff5252;
  background: #2d0909;
  padding: 0.7rem;
  border-radius: 8px;
  font-weight: 600;
}