body {
    padding-top: 71px;
    background-position-y: 71px !important;
    padding-bottom: 71px;
}

.overflow-y-scroll {
    overflow-y: scroll;
}

.vh-100-header {
    height: calc(100vh - 50px );
}

/* loading overlay */
#overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    filter: alpha(opacity=50);
    background-repeat: no-repeat;
    background-position: center center;
    background-image: url('data:image/gif;base64,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');
    opacity: 0.5;
    z-index: 10000;
}