footer {
    padding: var(--spacing-12) var(--spacing-8);
    background-color: var(--color-neutral-900);
    nav {
        display: flex;
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    small, h6 {
        color: var(--color-neutral-0);
    }
}

/* ── Link "Desenvolvido por" ───────────────────────────── */
.footer-link {
    color: var(--color-primary-0);
    text-decoration: underline;
    text-underline-offset: 0.2em;
    text-decoration-color: color-mix(in srgb, var(--color-primary-0) 50%, transparent);
    font-weight: var(--font-weight-semibold);
    -webkit-tap-highlight-color: transparent;
    transition:
        color var(--transition-fast),
        text-decoration-color var(--transition-fast);
}

.footer-link:hover,
.footer-link:focus-visible {
    color: var(--color-primary-300);
    text-decoration-color: var(--color-primary-300);
}

.footer-link:active {
    color: var(--color-primary-300);
    text-decoration-color: var(--color-primary-300);
}

/* ── Responsivo: Mobile (< 768px) ─────────────────────── */
@media (max-width: 47.9375rem) {
    footer {
        padding: var(--spacing-8) var(--spacing-4);
        nav {
            flex-direction: column;
            gap: var(--spacing-3);
            text-align: center;
        }
    }
}

/* ── Botão Flutuante WhatsApp ──────────────────────────── */
.whatsapp-float {
    position: fixed;
    bottom: var(--spacing-6);
    right: var(--spacing-6);
    z-index: var(--z-fixed);

    display: flex;
    align-items: center;
    justify-content: center;

    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background-color: var(--color-primary-0);

    color: var(--color-neutral-900);
    font-size: 1.75rem;
    line-height: 1;
    text-decoration: none;

    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-bounce), box-shadow var(--transition-base);
}

.whatsapp-float:hover,
.whatsapp-float:focus-visible {
    transform: scale(1.12);
    box-shadow: var(--shadow-xl);
    color: var(--color-neutral-900);
}

.whatsapp-float i {
    pointer-events: none;
}

@media (max-width: 640px) {
    .whatsapp-float {
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
        bottom: var(--spacing-4);
        right: var(--spacing-4);
    }
}