html,body{
    height: 100%;
}
body {
    font-size: 14px;
    color: #666;
    min-width: 320px;
    background: #fff;
}

.link-btn {
    display: inline-block;
    vertical-align: middle;
    text-decoration: none;
    margin: 0 auto;
    cursor: pointer;
}



.spinner {
    display: block;
    margin: 4rem auto;
    width: 4rem;
    height: 4rem;
    text-align: center;
    font-size: 1rem;
}

.spinner>div {
    background-color: #d7d6d6;
    height: 100%;
    width: 6px;
    display: inline-block;

    -webkit-animation: stretch-delay 1.2s infinite ease-in-out;
    animation: stretch-delay 1.2s infinite ease-in-out;
}

.spinner .rectangle2 {
    -webkit-animation-delay: -1.1s;
    animation-delay: -1.1s;
}

.spinner .rectangle3 {
    -webkit-animation-delay: -1.0s;
    animation-delay: -1.0s;
}

.spinner .rectangle4 {
    -webkit-animation-delay: -0.9s;
    animation-delay: -0.9s;
}

.spinner .rectangle5 {
    -webkit-animation-delay: -0.8s;
    animation-delay: -0.8s;
}


@-webkit-keyframes stretch-delay {

    0%,
    40%,
    100% {
        -webkit-transform: scaleY(0.4)
    }

    20% {
        -webkit-transform: scaleY(1.0)
    }
}

@keyframes stretch-delay {

    0%,
    40%,
    100% {
        transform: scaleY(0.4);
        -webkit-transform: scaleY(0.4);
    }

    20% {
        transform: scaleY(1.0);
        -webkit-transform: scaleY(1.0);
    }
}