body {
      font-family: Arial, sans-serif;
      max-width: 900px;
      margin: 2rem auto;
      padding: 1rem;
      background: #f8fdfc;
      color: #333;
    }
    h1 {
      text-align: center;
      color: #005c4b;
    }
    label {
      display: block;
      margin-top: 1rem;
      font-weight: bold;
    }
    input, select {
      width: 100%;
      padding: 0.5rem;
      margin-top: 0.3rem;
      border: 1px solid #ccc;
      border-radius: 4px;
    }
    .waste-group {
      border: 1px solid #ddd;
      padding: 1rem;
      margin-top: 1rem;
      background: #fff;
      border-radius: 6px;
    }
    button {
      background: #00785a;
      color: white;
      padding: 0.6rem 1.2rem;
      border: none;
      border-radius: 4px;
      margin-top: 1rem;
      cursor: pointer;
    }
    button:hover {
      background: #005c4b;
    }
    .results {
      margin-top: 2rem;
      background: #eef6f3;
      padding: 1rem;
      border-radius: 6px;
    }
    .results span {
      font-weight: bold;
    }