#loading {
    display: none;
    width: 100vw;
    height: 100vh;
}

#loading .background {
    width: 100%;
    height: 100%;
    background-image: url(../images/loading_bg.png);
    background-size: 100% 100%;
}

.progress-bar {
    position: relative;
    bottom: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 10px;
}

.progress-bar .progress-background {
    width: 100%;
    height: 100%;
    background-image: url(../images/progress_bg.png);
    background-size: 100% 100%;
}

.progress-bar .progress {
    position: absolute;
    top: 0;
    width: 0;
    height: 100%;
    background-image: url(../images/progress_fg.png);
    background-size: cover;
    background-position: center;
    border-radius: 5px;
    transition: width 0.1s;
}

.progress-bar .progress-handle {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background-image: url(../images/progress_handle.png);
    background-size: 100% 100%;
    z-index: 99;
    transition: left 0.1s;
}