/* ── Floating Action Button (WhatsApp) ── */
.wa-fab {
    position: fixed;
    bottom: 100px;
    right: 24px;
    z-index: 999;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #25d366;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-decoration: none;
    opacity: 0;
    transform: scale(0.5) translateY(20px);
}

.wa-fab.visible {
    opacity: 1;
    transform: scale(1) translateY(0);
}

.wa-fab:hover {
    transform: scale(1.1) translateY(-3px);
    box-shadow: 0 8px 30px rgba(37, 211, 102, 0.5);
}

.wa-fab svg {
    width: 28px;
    height: 28px;
    fill: #fff;
}

.wa-fab-pulse {
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid rgba(37, 211, 102, 0.4);
    animation: waPulse 2s ease-out infinite;
}

@keyframes waPulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

@media (max-width: 768px) {
    .wa-fab {
        bottom: 80px;
        right: 16px;
        width: 50px;
        height: 50px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .wa-fab-pulse {
        animation: none !important;
    }
}