body {
  background: #0d1117;
  color: white;
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background: #161b22;
  padding: 30px;
  border-radius: 10px;
  width: 350px;
  text-align: center;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.4);
}

input[type="range"] {
  width: 100%;
}

.checkbox-group {
  text-align: left;
  margin: 20px 0;
}

button {
  margin-top: 10px;
  width: 100%;
  padding: 10px;
  border: none;
  background: #238636;
  color: white;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background: #2ea043;
}

#output {
  width: 94%;
  margin-top: 15px;
  padding: 10px;
  color: white;
  background: #0d1117;
  border-radius: 5px;
  border: none;
  text-align: center;
}