.loading-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px; 
}
.hidden {
    display: none !important;
}
.fade-in {
    opacity: 0;
    transition: opacity 0.5s ease-in;
}
.fade-in.show {
    opacity: 1;
}