body {
    font-family: system-ui, Arial;
    margin: 0;
    background: #f7f7f7;
}

/* Keep main content boxed */
main {
    max-width: 900px;
    margin: 1rem auto;
    background: #fff;
    padding: 1rem;
    border-radius: 6px;
}

table {
    width: 100%;
    border-collapse: collapse
}

th,
td {
    border: 1px solid #ddd;
    padding: .4rem;
    text-align: left
}

.error {
    color: #a00
}

.ok {
    color: green
}

form label {
    display: block;
    margin: .5rem 0
}

textarea {
    width: 100%;
    height: 120px
}