main form > div {
    margin-bottom: 1rem;
}

label {
    display: block;
}

input {
    padding: 0.5rem;
}

button {
    cursor: pointer;
    display: inline-block;
    font-family: inherit;
    line-height: normal;
    text-align: center;
    vertical-align: middle;
}

.error {
    color: red;
}

span.error {
    display: block;
}