.blur {
    -ms-filter: blur(6px);
    filter: blur(6px);
}
.hidebar {
    overflow-y: scroll;
    -ms-overflow-style: none; /* IE, Edge 対応 */
    scrollbar-width: none; /* Firefox 対応 */
}
.hidebar::-webkit-scrollbar {
    /* Chrome, Safari 対応 */
    display: none;
}
@keyframes bggradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}
@keyframes fadeIn {
    0% {
        display: none;
        opacity: 0;
    }
    1% {
        display: block;
        opacity: 0;
    }
    100% {
        display: block;
        opacity: 1;
    }
}
@keyframes fade50 {
    0% {
        opacity: 0;
    }
    50% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}