*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  body {
    font-family: Arial, sans-serif;
    background: #f0f2f5;
    line-height: 1.4;
  }
  .callback-page-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
  }
  .lk-page .form {
    width: 100%;
    max-width: 640px;
    background: #fafcfc;
    border: 1px solid #ecf2f4;
    border-radius: 3px;
    margin: 0 auto;
  }
  .lk-page .top-form {
    padding: 54px 60px 60px;
  }
  .lk-page .big-title {
    margin-bottom: 34px;
    font-size: 1.2em;
    font-weight: bold;
    color: #333;
  }
  .form-group {
    margin-bottom: 20px;
  }
  .form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: #333;
    position: relative;
  }
  .form-label.required::before {
    content: "*";
    position: absolute;
    left: -12px;
    top: 0;
    color: #d10000;
    font-weight: bold;
    line-height: 1.2;
  }
  .form-group input,
  .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    background: #fff;
    color: #333;
    transition: border-color .3s;
  }
  .form-group input:focus,
  .form-group textarea:focus {
    border-color: #006eff;
    outline: none;
  }
  .form-checkbox {
    margin-bottom: 20px;
  }
  .checkbox-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    border: 1px solid #ccc;
    border-radius: 6px;
    background: #fff;
    transition: border-color .3s;
  }
  .checkbox-wrapper.checked {
    border-color: #006eff;
  }
  .checkbox-wrapper input[type="checkbox"] {
    width: 14px;
    height: 14px;
    margin-top: 2px;
    accent-color: #006eff;
    cursor: pointer;
  }
  .checkbox-wrapper .checkbox-label-text {
    font-size: 14px;
    line-height: 1.5;
    color: #333;
  }
  .checkbox-wrapper .checkbox-label-text a {
    color: #006eff;
    text-decoration: underline;
  }
  .but-r {
    text-align: left;
    margin-top: 8px;
  }
  .submit-button {
    display: none;
    background: #006eff;
    color: #fff;
    border: none;
    padding: 12px 24px;
    font-size: 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background .3s;
  }
  .submit-button:hover {
    background: #0051c7;
  }
  .success-message {
    background: #fff;
    color: #006eff;
    border: 1px solid #006eff;
    border-radius: 4px;
    padding: 20px;
    text-align: center;
    display: none;
  }
  @media (max-width: 768px) {
    .lk-page .top-form { padding: 40px 30px 40px; }
  }
  @media (max-width: 480px) {
    .lk-page .top-form { padding: 30px 15px 30px; }
    .form-group input,
    .form-group textarea { padding: 8px; font-size: 13px; }
    .submit-button { width: 100%; }
  }