body {
    /* height: 100vh; */
    margin: 0;
    width: 100%;
    height: 100%;
    background: #2196f3;  
    background: -webkit-linear-gradient(to left, #8fc7f5, #2196f3);  
    }
    .judul{
        /* background-color: black; */
        color: #fff;
        margin : 0;
        padding : 0;
        align-items: center;
        justify-content: center;
        text-align: center;
        font-family: sans-serif;
    }

    .button{
        margin : 0;
        padding : 0;
        /* background-color: black; */
        display : flex;   
        align-items: center;
        justify-content: center;
    }
    .judul img {
        margin: auto; width: 125px;display:block;
    }
    .button img {
        margin: auto;margin-bottom: 5px; width: 125px;display:block;
    }

    a {
    position : relative;
    width: 290px;
    height: 220px;
    margin-top: 15px;
    margin-bottom: 15px;
    padding: 20px 20px 20px 20px;
    color: #fff;
    text-align: center;
    font-size: 20px;
    font-family: sans-serif;
    text-decoration : none;
    text-transform: uppercase;
    /* letter-spacing: 10px; */
    transition : 0.1s;
    }
    a:hover{
    background:#0786ee;
    transition-delay: 0.5s;
    box-shadow: -30px 30px 50px rgba(0,0,0,.4);
    /* transform: rotate(-360deg) skew(2deg); */
    text-decoration : none;
    color: #fff;
    }
    
    a:before,
    a:after{
    content: '';
    position : absolute;
    width: 3px;
    border-radius: 15px;
    height: 100%;
    background : #fff;
    pointer-events: none;
    transform-style: linear;
    transition-property: width,opacity,transform,box-shadow;
    transition-duration: 0.1s;
    text-decoration : none;
    }
    a:before{
    top: 0;
    left: 0;
    }
    a:after{
    top:0;
    right:0;
    }
    a:hover:before{
    width:100%;
    opacity: 0.1;
    transform: translate(5px,-5px);
    box-shadow: +2px 2px 2px rgba(0,0,0,.1);
    transition-delay:0s,0.5s,0.5s,0.5s;
    }
    a:hover:after{
    width:100%;
    opacity: 0.1;
    transform: translate(10px,-10px);
    box-shadow: +2px 2px 2px rgba(0,0,0,.1);
    transition-delay:0s,0.5s,0.5s,0.5s;
    text-decoration : none;
    }
    
    
.circles{
    position: absolute;
    z-index: -1;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.circles li{
    position: absolute;
    z-index: -1;
    display: block;
    list-style: none;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    animation: animate 25s linear infinite;
    bottom: -150px;
    
}

.circles li:nth-child(1){
    left: 25%;
    width: 80px;
    height: 80px;
    animation-delay: 0s;
}


.circles li:nth-child(2){
    left: 10%;
    width: 20px;
    height: 20px;
    animation-delay: 2s;
    animation-duration: 12s;
}

.circles li:nth-child(3){
    left: 70%;
    width: 20px;
    height: 20px;
    animation-delay: 4s;
}

.circles li:nth-child(4){
    left: 40%;
    width: 60px;
    height: 60px;
    animation-delay: 0s;
    animation-duration: 18s;
}

.circles li:nth-child(5){
    left: 65%;
    width: 20px;
    height: 20px;
    animation-delay: 0s;
}

.circles li:nth-child(6){
    left: 75%;
    width: 110px;
    height: 110px;
    animation-delay: 3s;
}

.circles li:nth-child(7){
    left: 35%;
    width: 150px;
    height: 150px;
    animation-delay: 7s;
}

.circles li:nth-child(8){
    left: 50%;
    width: 25px;
    height: 25px;
    animation-delay: 15s;
    animation-duration: 45s;
}

.circles li:nth-child(9){
    left: 20%;
    width: 15px;
    height: 15px;
    animation-delay: 2s;
    animation-duration: 35s;
}

.circles li:nth-child(10){
    left: 85%;
    width: 150px;
    height: 150px;
    animation-delay: 0s;
    animation-duration: 11s;
}



@keyframes animate {

    0%{
        transform: translateY(0) rotate(0deg);
        opacity: 1;
        border-radius: 0;
    }

    100%{
        transform: translateY(-1000px) rotate(720deg);
        opacity: 0;
        border-radius: 50%;
    }

}