* {
    box-sizing: border-box;
}

html,
body {
    font-size: 20px;
    height: 100vh;
    margin: 0;
    background-color: #fff;
}

.form-wrapper {
    position: relative;
    display: grid;
    height: 100%;
    margin: 0;
    place-items: center;
    max-width: 100%;
    padding: 2rem;
}

form {
    margin: auto;
    width: 100%;
    max-width: 400px;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: #444;
}

input {
    display: block;
    width: 100%;
    margin: 0 0 1rem 0;
    padding: 0.5rem;
    font-size: 1rem;
    border: 0;
    border-radius: 0.125rem 0.25rem;
    background-color: hsl(222, 20%, 95%);
}

button {
    display: block;
    padding: 0.5rem;
    border: 0;
    border-radius: 0.125rem 0.25rem;
    background-color: #40cb90;
    color: #fff;
    margin: 2rem 0 0 auto;
}

input:focus,
button:focus {
    outline: 0;
}

canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}