canvas {
    display: block;
    vertical-align: bottom;
}
/* ---- particles.js container ---- */
#particles-js {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 90vh;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: 50% 50%;
    z-index: 1;
}

img {
    display: block;
    width: 100%;
    height: auto;
}

div {
    position: relative;
}