body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
}
#number-container {
    padding: 1rem;
    max-width: 600px;
    margin: auto;
}
.number {
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
}
#loader {
    text-align: center;
    padding: 1rem;
    font-style: italic;
    color: gray;
}