canvas{
    background-color: lavender;
    /*width: 400px;*/
    border: 1px solid darkgray;
}

h3 {
    text-align: center;
    width: 100%;
}

.h3-section {
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.h3-section canvas,
.h3-section input {
    margin: 2px auto;
}