Tạo button download bằng CSS3 cho blogspot

<a href="#" class="buttonDownload3" title="Click Here">DOWNLOAD</a>

<style>
.buttondownload3,
.buttondownload3:hover {
    color: #fff!important
}
.buttonDownload3 {
    display: inline-block;
    position: relative;
    padding: 13px 20px 13px 25px;
    background: #2187e7;
    font-family: times;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    text-indent: 15px;
    border-radius: 5px
}
.buttonDownload3:hover {
    opacity: .9
}
.buttonDownload3:before,
.buttonDownload3:after {
    content: ' ';
    display: block;
    position: absolute;
    left: 15px;
    top: 52%
}
.buttonDownload3:before {
    width: 10px;
    height: 2px;
    border-style: solid;
    border-width: 0 2px 2px
}
.buttonDownload3:after {
    margin-left: 3px;
    margin-top: -7px;
    border-style: solid;
    border-width: 4px 4px 0;
    border-color: transparent;
    border-top-color: inherit;
    animation: downloadArrow .7s linear infinite;
    animation-play-state: paused
}
.buttonDownload3:hover:before {
    border-color: #fff
}
.buttonDownload3:hover:after {
    border-top-color: #fff;
    animation-play-state: running
}
@keyframes downloadArrow {
    0% {
        margin-top: -7px;
        opacity: 1
    }
    0.001% {
        margin-top: -15px;
        opacity: 0
    }
    50% {
        opacity: 1
    }
    100% {
        margin-top: 0;
        opacity: 0
    }
}
</style>