body {
    margin: 0;
    background-color: #B1F0F7;
}

body::-webkit-scrollbar {
    display: none;
}

/* PC */
@media screen and (min-width:1024px) {
    canvas {
        display: block;
        margin: 0 auto;
    }
}

/* tablet */
@media screen and (min-width:768px) and (max-width:1024px) {
    canvas {
        display: block;
        margin: 0 auto;
    }
}

/* smartphone */
@media screen and (max-width:768px) {
    canvas {
        display: block;
        margin: 0 auto;
    }
}