.site-footer {
    background-color: var(--surface-container-low);
    border-top: 1px solid var(--surface-container-highest);
    /* Fluid padding: 2rem no mobile até 4rem no desktop (top), 0 (right/left), 1rem (bottom) */
    padding: clamp(2rem, 5vw, 4rem) 0 1rem;
}

.footer-container {
    margin: 0 auto;
}

/* Mobile First Base */
.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    /* 1 column on mobile */
    gap: clamp(1.5rem, 4vw, 2rem);
    margin-bottom: clamp(2rem, 5vw, 4rem);
}

.footer-logo {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
    font-weight: 800;
    color: var(--primary);
    margin-bottom: clamp(0.75rem, 2vw, 1rem);
}

.footer-logo-link {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    transition: transform 0.3s ease;
    margin-bottom: clamp(0.75rem, 2vw, 1rem);
}

.footer-logo-link:hover {
    transform: scale(1.05);
}

.footer-logo-link:hover::after {
    width: 0px;
}

.footer-logo-image {
    height: clamp(32px, 5vw, 40px);
    width: auto;
    object-fit: contain;
}

.footer-logo-link .footer-logo {
    margin-bottom: 0;
}

.brand-col p {
    color: var(--secondary);
    font-size: clamp(0.875rem, 2vw, 0.95rem);
    margin-bottom: 1.5rem;
    max-width: 100%;
}

.social-icons {
    display: flex;
    gap: 0.5rem;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: clamp(36px, 5vw, 42px);
    height: clamp(36px, 5vw, 42px);
    background-color: var(--surface-container-highest);
    border-radius: 50%;
    color: var(--primary);
    transition: background-color 0.2s;
    flex-shrink: 0;
}

.social-icons a:hover {
    background-color: var(--primary-container);
    color: var(--on-primary);
}

.footer-col h4 {
    font-size: clamp(1rem, 2vw, 1.125rem);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 1rem;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: clamp(0.75rem, 2vw, 1rem);
}

.footer-col a,
.contact-col span {
    color: var(--secondary);
    font-size: clamp(0.875rem, 2vw, 0.95rem);
}

.contact-col li {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.contact-col .material-symbols-outlined {
    color: var(--tertiary);
    font-size: clamp(1.125rem, 2.5vw, 1.25rem);
    flex-shrink: 0;
    line-height: 1.2;
}

/* Mobile First Bottom Section */
.footer-bottom {
    display: flex;
    flex-direction: column;
    /* Stack on mobile */
    align-items: center;
    text-align: center;
    gap: clamp(1rem, 2vw, 1.5rem);
    padding-top: clamp(1.5rem, 4vw, 2rem);
    border-top: 1px solid var(--surface-container-highest);
    color: var(--secondary);
    font-size: clamp(0.75rem, 1.5vw, 0.8rem);
}

.legal-info {
    display: flex;
    flex-direction: column;
    /* Stack on mobile */
    gap: 0.5rem;
}

.legal-info span {
    font-weight: 700;
    color: var(--secondary);
}

/* --- Botão Voltar ao Topo --- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary);
    /* O teu verde claro */
    color: var(--on-primary, #fff);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
}

/* Classe adicionada pelo JS quando fazemos scroll */
.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--primary-container);
    transform: translateY(-3px);
    /* Pequeno efeito de levantar */
}

/* Desktop Styles */
@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr;
        /* grid-template-columns: 1.5fr 1fr 1fr 1.5fr; */
        /* 4 columns on desktop */
    }

    .brand-col p {
        max-width: 280px;
    }

    .footer-bottom {
        flex-direction: row;
        /* Row on desktop */
        justify-content: space-between;
    }

    .legal-info {
        flex-direction: row;
        /* Row on desktop */
        gap: 1.5rem;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}