#concerts {
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow-y: scroll;
    align-self: center;
    width: 100%;
    transition: filter 0.2s;
    flex-wrap: wrap;
    align-content: center;
    justify-content: center;
    animation: fadeIn 0.2s ease-in-out;
    align-items: center;
}
billetto-organiser-widget {
    margin-top: 1em;
    height: 90%;
    align-content: center;
}
.loader {
    position: absolute;
    left: 50%;
    width: 2em;
    height: 2em;
    border: 4px solid #ccc;
    border-top-color: #007bff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    z-index: 999;
}
@keyframes spin {
    from { transform: translateX(-50%) rotate(0deg); }
    to { transform: translateX(-50%) rotate(360deg); }
}
.hidden {
    display: none !important;
}