.btn {
    display: inline-block;
    background: var(--accent-color);
    color: var(--white-color);
    padding: 0.8rem 1.8rem;
    border: 2px solid var(--accent-color);
    border-radius: 5px;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.3s ease, color 0.3s ease;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.btn:hover {
    background-color: transparent;
    color: var(--accent-color);
}

.btn-whatsapp {
    background-color: #25d366;
    border-color: #25d366;
    color: white !important;
}

.btn-whatsapp:hover {
    background-color: #1ebe57;
    border-color: #1ebe57;
}

@media (max-width: 768px) {
    .btn {
        max-width: 280px;
        margin-left: auto;
        margin-right: auto;
    }
}