body {
  background: linear-gradient(135deg,#6a11cb,#2575fc);
  font-family: Arial, sans-serif;
  color:#fff;
  display:flex;
  justify-content:center;
  align-items:center;
  height:100vh;
  margin:0;
}

.radio-box {
  background:#0d0d0d;
  padding:30px;
  border-radius:20px;
  width:340px;
  text-align:center;
  box-shadow: 0 0 30px rgba(255,0,255,0.5);
}

.controls {
  margin-top:20px;
}

button {
  background:#ff2f92;
  border:none;
  padding:12px 18px;
  border-radius:30px;
  color:#fff;
  font-size:16px;
  cursor:pointer;
  margin:5px;
}

button:hover {
  opacity:0.9;
}

input[type=range] {
  width:100%;
  margin-top:15px;
}