/* Fuente base */
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background: #ffffff;
    color: #111;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: white;
    border: 2px solid #111;
    border-radius: 10px;
    text-decoration: none;
    font-weight: bold;
    color: #111;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.btn:hover {
    background: #f1f1f1;
}

/* Responsive compartido */
@media (max-width: 768px) {
    .btn {
        font-size: 1rem;
        padding: 0.9rem 1.8rem;
    }
}