body {
    background: url('https://riversun.github.io/img/yosemite.jpg') 100% repeat fixed;
    background-size: cover;
    margin: 8px;
    display: block;
    font-weight: lighter;
    font-size: 16px;
    color: #666666;
}

#toolbar {
    filter: blur(6px);
    overflow: hidden;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
}

.btn {
    display: inline-block;
    line-height: 30px;
    color: #FFF;
    text-decoration: none;
    text-align: center;
    background-color: #28a745;
    border-radius: 5px;
    border-width: 0px;
    margin: 5px;
    -webkit-transition: all 0.5s;
    transition: all 0.5s;
}

.btn:hover {
    background-color: #218d3a;
}

.btn:active {
    position: relative;
    top: 1px;
    left: 2px;
}

.btn:focus {
    outline: none;
}