/* Фон модального окна */
.modal {
    display: none; 
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

/* Контентное окно */
.modal-content {
    background-color: #fff;
    margin: 10% auto;
    padding: 20px;
    border-radius: 8px;
    width: 350px;
    position: relative;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

/* Кнопка закрытия */
.close-button {
    position: absolute;
    right: 15px;
    top: 10px;
    font-size: 24px;
    cursor: pointer;
}

.form-group { margin-bottom: 15px; }
.form-group input { width: 100%; padding: 8px; box-sizing: border-box; }
.btn-submit { width: 100%; padding: 10px; background: #28a745; color: white; border: none; cursor: pointer; }