.modal-content {
    max-height: 75vh; /* 75% от высоты окна */
    display: flex;
    flex-direction: column;
}

.modal-body {
    overflow-y: auto;
    flex: 1;
}

#HelpModalPopup .modal-footer {
    text-align: right;
    border-top: 1px solid #e0e0e0;
    padding: 10px 15px;
}

#HelpModalPopup, #HelpMouseOver {
    background-color: rgba(0, 0, 0, 0.5);
}

.btn-close:hover, .btn-close:focus {
    background-color: #f5f5f5;
    text-decoration: none;
}

@media (min-width: 768px) {
    .modal-xl {
        width: 80%;
    }
}

#HelpModalPopup .modal-dialog {
    padding-top: 5%;
}

#HelpModalPopup .modal-header {
    padding: 1rem;
    border-bottom: none;
    display: flex;
    justify-content: flex-end;
    padding-bottom: 0;
}

.btn-close {
    padding: 0.5rem;
    margin: 0;
    background: transparent url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3cpath d='M.293.293a1 1 0 011.414 0L8 6.586 14.293.293a1 1 0 111.414 1.414L9.414 8l6.293 6.293a1 1 0 01-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 01-1.414-1.414L6.586 8 .293 1.707a1 1 0 010-1.414z'/%3e%3c/svg%3e") center/1em no-repeat;
    border: 0;
    border-radius: 0.25rem;
    opacity: .5;
    cursor: pointer;
    transition: opacity .15s ease-in-out;
}

.btn-close:hover {
    opacity: 1;
}
.fixed-bottom-right {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
    max-width: 350px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.fixed-bottom-right .panel {
    margin-bottom: 0px;
}