/* Botão Voltar ao Topo Global */
.back-to-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    background-color: #007bff; /* Use sua variável --accent-blue se preferir */
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    z-index: 2000;
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
}

.back-to-top-btn.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top-btn:hover {
    transform: translateY(-5px);
    background-color: #0056b3;
}

@media (max-width: 768px) {
    .back-to-top-btn { bottom: 20px; right: 20px; width: 40px; height: 40px; }
}