body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: rgba(128, 128, 128, 1);
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }
  
  .container {
    text-align: center;
    width: 300px;
    background: rgba(0, 0, 0, 0.7);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
  }
  
  h1 {
    margin-bottom: 20px;
    font-size: 1.8rem;
  }
  
  .sliders label {
    display: block;
    margin: 10px 0 5px;
  }
  
  .sliders input {
    width: 100%;
  }
  
  .output {
    margin-top: 20px;
    font-size: 1.2rem;
    background: #222;
    padding: 10px;
    border-radius: 5px;
  }

  .but {
    background-color: greenyellow;
    padding: 3px;
    border-radius: 15%;
    color: blue;
  }