.cpf-calculadora {
    max-width: 640px;
    margin: 1.5em 0;
    padding: 1.5em;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: inherit;
}

.cpf-calculadora h3 {
    margin-top: 0;
}

#cpf-form {
    display: flex;
    flex-wrap: wrap;
    gap: 1em;
    align-items: flex-end;
}

#cpf-form label {
    display: flex;
    flex-direction: column;
    font-size: 0.9em;
    gap: 0.3em;
}

#cpf-form input {
    padding: 0.5em;
    border: 1px solid #ccc;
    border-radius: 4px;
}

#cpf-form button {
    padding: 0.6em 1.2em;
    background: #2271b1;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

#cpf-form button:hover {
    background: #135e96;
}

#cpf-resultado {
    margin-top: 1.5em;
}

.cpf-fuente {
    font-size: 0.85em;
    color: #666;
}

.cpf-tabla {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9em;
}

.cpf-tabla th,
.cpf-tabla td {
    padding: 0.5em;
    border-bottom: 1px solid #eee;
    text-align: right;
}

.cpf-tabla th:first-child,
.cpf-tabla td:first-child {
    text-align: left;
}

.cpf-mejor {
    background: #eaf7ea;
    font-weight: bold;
}

.cpf-error {
    color: #c0392b;
}