.sidebar {
    height: 100vh;
}

.loading {
    color: transparent !important;
    background: rgb(250,250,250) !important;
    border-color: rgba(215,215,215,0.38) !important;

}

.btn {
    position: relative;
}

.loading::after {
    content: '';
    background-image: url("assets/images/loader.gif");
    height: 25px;
    width: 25px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: block;
    position: absolute;
    right: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}