body {
    font-family: Arial, sans-serif;
    background: #f3f4f6;
    margin: 0;
    padding: 0;
  }
  header {
    text-align: center;
    padding: 30px 20px;
  }
  header h1 {
    color: #333;
    font-size: 2rem;
    margin: 0;
  }
  header h2 {
    color: #555;
    font-size: 1.2rem;
  }
  main {
    max-width: 600px;
    margin: auto;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 30px 20px;
  }
  label {
    display: block;
    margin-top: 20px;
    font-weight: bold;
    color: #444;
  }
  input[type="file"],
  input[type="range"] {
    width: 100%;
    margin: 10px 0;
  }
  #preview {
    display: none;
    margin-top: 20px;
    width: 40vw;
    max-width: 100%;
    height: auto;
    border: 2px dashed #ccc;
    padding: 10px;
    border-radius: 8px;
  }
  button {
    background: #4f46e5;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    margin-top: 20px;
    width: 100%;
  }
  button:hover {
    background: #3730a3;
  }
  footer {
    text-align: center;
    font-size: 0.9rem;
    color: #777;
    padding: 20px;
  }
  .seo-text {
    max-width: 700px;
    margin: 40px auto 20px;
    font-size: 0.95rem;
    color: #555;
    padding: 0 20px;
    line-height: 1.6;
  }
  @media (max-width: 600px) {
    #preview {
      width: 90vw;
    }
    .seo-text {
      font-size: 0.9rem;
    }
  }