/* Стили кнопки */
  .btn-lesson {
    display: block;
    width: 100%;
    background: linear-gradient(165deg, #03697A, #EFE7E7);
    border-radius: 8px;
    border: 1px solid #73EEDC;
    padding: 10px 5px;
    font-family: 'Mulish', sans-serif;
    font-size: 15px;
    font-weight: 400;
    line-height: 120%;
    color: #0C0A34;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
  }
  .btn-lesson:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  }

  /* Стили попапа */
  .popup-overlay-universal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    z-index: 10001;
    align-items: center;
    justify-content: center;
  }
  .popup-content-universal {
    background: #0C0A34AD;
    border: 1px solid #73EEDC;
    border-radius: 8px;
    box-shadow: 0 0 15px #73EEDC;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    color: #EFE7E7;
    font-family: 'Mulish', sans-serif;
  }
  .popup-close-universal {
    position: absolute;
    top: 10px;
    right: 15px;
    background: none;
    border: none;
    color: #73EEDC;
    font-size: 30px;
    cursor: pointer;
    transition: color 0.3s;
  }
  .popup-close-universal:hover {
    transform: scale(1.1);
    color: #EFE7E7;
  }
.popup-title-universal {
    font-size: 24px;
    color: #73EEDC;
    margin-bottom: 10px;
    text-align: center;
    font-weight: 600;
  }
  .popup-subtitle-universal {
    text-align: center;
    font-size: 18px;
    margin-bottom: 20px;
    background: rgba(115, 238, 220, 0.15);
    padding: 12px;
    border-radius: 12px;
    border-left: 3px solid #73EEDC;
  }
  .popup-subtitle-universal span {
    font-weight: bold;
    color: #73EEDC;
  }
  @media (max-width: 768px) {
    .popup-content-universal { padding: 20px; width: 95%; }
  }