* {
    margin: 0;
    padding: 0;
}

.center {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: center;
}

.canvas-box {
    width: fit-content;
    position: relative;
    margin: 0;
    padding: 0;
    border: 1px solid red;
}

canvas {
    position: absolute;
    left: 0;
    top: 0;
    border: 1px solid blue;
}