canvas {
    width: 100%;
    height: 100%;
}
body:after {
    content: '';
    width: 100%;
    height: 100%;
    min-height: 100vh;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, 0.1);
    z-index: 1;
    -webkit-animation: thunder-bg 6s infinite;
    animation: thunder-bg 6s infinite;
}

canvas {
    display: block;
    position: absolute;
    top: 0;
    left: 0;
}

#canvas3 {
    z-index: 5;
}

#canvas2 {
    z-index: 2;
}

#canvas1 {
    z-index: 100;
}

@-webkit-keyframes thunder-bg {
    0% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.1));
    }
    9% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.1));
    }
    10% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.1));
    }
    10.5% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
    80% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
    82% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
    83% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
    83.5% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
    100% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
}

@keyframes thunder-bg {
0% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.1));
    }
    9% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.1));
    }
    10% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.1));
    }
    10.5% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
    80% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
    82% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
    83% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
    83.5% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
    100% {
        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.1));
    }
}
.cover-background {
    width: 100%;
    height: 100%;
    min-height: 100vh;
    background-color: #222;
    background-image: url("../images/bg-image/slide3.jpg");
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    position: relative;
}

.pricing-box-style3 {
    min-height: 499px;
}

@media screen and (min-width: 1279px) {
    
}