.modal {
    position: fixed;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    background: rgba(24, 78, 107, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s ease;
    z-index: 100;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-window {
    display: none;
}

.modal-window.active {
    display: block;
}