.mask-modal-popup {
    position: fixed; 
    top: 0; 
    left: 0; 
    padding: 0; 
    margin: 0; 
    width: 100%;
    height: 100vh; 
    background-color: rgba(0,0,0,0.0); 
    z-index: 9999; 
    transition: background-color 0.4s ease 0.4s;
}

.mask-modal-popup.mask-modal-popup-show {
    background-color: rgba(0,0,0,0.8); 
    transition: background-color 0.4s;
}

.mask-modal-popup-hide {
    display: none;
}

.mask-modal-popup-container {
    max-width: 500px;
    max-height: 100%;
    margin: auto; 
    padding: 50px 10px 0;
    opacity: 0; 
    transition: padding-top 0.4s, opacity 0.4s;
    overflow-y: auto;
    box-sizing: border-box;
}

.mask-modal-popup-show .mask-modal-popup-container {
    padding-top: 100px; 
    opacity: 1; 
}

.mask-modal-popup-box {
    border-radius: 5px; 
    background-color: #eee; 
    width: 100%;
    margin-bottom: 50px;
}

.mask-modal-popup-header {
    padding: 10px; 
    border-top-left-radius: 5px; 
    border-top-right-radius: 5px;
}
.mask-modal-popup-header span {
    font-weight: bold; color: white;
}

.mask-modal-popup-body {
    padding: 10px; 
    border-top: 1px solid black; 
    border-bottom: 1px solid black;
}

.mask-modal-popup-footer {
    padding: 10px; 
    border-bottom-left-radius: 5px; 
    border-bottom-right-radius: 5px;
}