body {
    font-family: 'Rounded Mplus 1c', sans-serif;
    background-color: #f0f4f8;
    color: #333;
    padding: 20px;
  }
  header {
    background-color: #e0f7fa;
    color: #444;
    letter-spacing: 0.1rem;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
  }
  header h1 {
    font-size: 2.5rem;
    letter-spacing: 0.1rem;
  }
  .hero {
    margin-top: 50px;
    padding: 20px;
    background-color: #fff;
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
  }
  .hero h1 {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
  }
  .hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
  }
  .hero img {
    max-width: 150px;
    margin: 10px;
    border-radius: 15px;
  }
  .form-group label {
    font-size: 1.1rem;
    font-weight: 700;
  }
  .form-control-file {
    font-size: 1rem;
  }
  .btn-primary {
    font-size: 1.2rem;
    padding: 10px 20px;
    border-radius: 30px;
    background-color: #28a745;
    border: none;
  }
  .btn-primary:hover {
    background-color: #218838;
  }
  .table-section h2 {
    font-size: 2rem;
    margin-bottom: 20px;
  }
  .table {
    font-size: 1rem;
  }
  .image-preview-container img {
    max-width: 100%;
    height: auto;
    margin: 10px 0;
    border-radius: 15px;
  }
  footer {
    background-color: #f1f1f1;
    padding: 20px;
    margin-top: 50px;
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  }
  footer p {
    margin: 0;
    font-size: 1rem;
  }
  .loading-message {
    font-size: 11px;
    color: #666;
    margin-top: 20px;
  }
  .ad-banner {
    background-color: #fff;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    margin-top: 20px;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  }
  .ad-banner img {
    width: 100%;
    max-width: 100%;
    border-radius: 0px;
  }
  @media (min-width: 768px) {
    .ad-banner img {
      max-width: 50%;
    }
  }
  .ad-banner-text {
    width: 100%;
    text-align: center;
    margin-bottom: 20px;
    color: #333;
    font-size: 14px;
    letter-spacing: 0.2rem;
  }
  .ad-banner-block {
    margin-bottom: 10px;
  }
  @media (max-width: 767px) {
    .ad-banner {
      flex-direction: column;
    }
  }
  .table-card {
    background-color: #fff;
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin-bottom: 20px;
  }
  footer {
    background-color: #e0f7fa;
    color: #444;
    letter-spacing: 0.1rem;
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin-top: 50px;
  }