h1 {
    margin-top: 3rem;
}
canvas {
    margin: 0 auto;
}
input[type="text"] {
    width: 100%;
    border-top: none;
    border-left: none;
    border-right: none;
}
input[type="text"],
button {
    margin-bottom: 1.5rem;
}
footer {
    margin-top: 3rem;
}
.main {
    margin-top: 4rem;
    margin-bottom: 4rem;
    width: 65vw;
    margin-left: auto;
    margin-right: auto;
}