.folder {
    background-color: #17a0e5;
    position: relative;
    width: 60px;
    height: 40px;
    display: block;
    border-top-right-radius: 6px;
    border-bottom-right-radius: 6px;
    border-bottom-left-radius: 6px;
}

.folder .folder-tab {
    position: absolute;
    height: 10px;
    left: 0;
    bottom: 100%;
    display: block;
    width: 40%;
    border-top-left-radius: 6px;
    background-color: inherit;
}
.folder .folder-tab:after {
    content: '';
    position: absolute;
    display: block;
    top: 0;
    left: calc(100% - 10px);
    border-bottom: 10px solid #17a0e5;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
}

.folder .folder-icn {
    padding-top: 12px;
    width: 100%;
    height: 100%;
    display: block;
}

.folder .downloading {
    width: 20px;
    height: 16px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.folder .custom-arrow {
    width: 6px;
    height: 12px;
    position: absolute;
    top: 0;
    left: 50%;
    margin-left: -3px;
    background-color: #fff;
    animation-name: arrow_down;
    animation-duration: 1.5s;
    animation-iteration-count: infinite;
}
.folder .custom-arrow:after {
    content: '';
    position: absolute;
    display: block;
    top: 100%;
    left: -6px;
    border-top: 7px solid #fff;
    border-left: 9px solid transparent;
    border-right: 9px solid transparent;
}

.folder .bar {
    width: 30px;
    height: 4px;
    background-color: #fff;
    margin: 0 auto;
}