.contact-section {
    /* background-image: url('../images/lienhetuvan_Nero_AI_Image_Upscaler_Photo_Face.jpeg');
    background-size: cover;        
    background-position: center;   
    background-repeat: no-repeat;  */
    background: linear-gradient(to right, #00aaff, #1e3c72);
    color: white;
    padding: 60px 0px;
    text-align: center;
    margin-bottom: 40px;
  }

  .contact-section h2 {
    font-weight: bold;
    margin-bottom: 20px;
    font-size: 20px;
  }

  .contact-section p {
    font-size: 16px;
    margin-bottom: 40px;
  }

  .contact-form {
    background-color: white;
    border-radius: 12px;
    padding: 30px 15px;
    max-width: 1000px;
    margin: 0 auto;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    color: #333;
  }

  .contact-form .form-control {
    border-radius: 10px;
    border: 1px solid #ccc;
    padding: 12px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
  }

  .contact-form .form-control:focus {
    border-color: #00aaff;
    box-shadow: 0 0 0 4px rgba(0, 170, 255, 0.2);
  }

  .contact-form textarea.form-control {
    resize: none;
    height: 120px;
  }

  .btn-submit {
    background: #2962ff;
    border: none;
    color: white;
    font-weight: bold;
    padding: 10px 30px;
    border-radius: 8px;
    transition: background 0.3s ease;
    font-size: 14px;
  }

  .btn-submit:hover {
    background: #0a46e9;
    color: #fff;
  }