.max-width-400 {
    max-width: 400px;
}

.social-links a {
    font-size: 1.5rem;
    text-decoration: none;
}

.features-list {
    padding: 20px;
}

.phone-mockup {
    padding: 20px;
}

@media (max-width: 768px) {
    .phone-mockup {
        margin-top: 40px;
    }
}