/* ==========================================================================
   WhatsApp Floating Button
   ========================================================================== */

.whatsapp-btn {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: var(--z-whatsapp);
    width: 56px;
    height: 56px;
    background: #25D366;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
    transition: var(--transition-normal);
    text-decoration: none;
}

.whatsapp-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(37, 211, 102, 0.5);
}

.whatsapp-btn__icon {
    display: block;
}

/* Pulse animation */
.whatsapp-btn::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: var(--radius-full);
    border: 2px solid #25D366;
    opacity: 0;
    animation: whatsapp-pulse 2.5s ease-out infinite;
}

@keyframes whatsapp-pulse {
    0%   { transform: scale(1); opacity: 0.6; }
    100% { transform: scale(1.4); opacity: 0; }
}

/* ── Responsive ── */
@media (max-width: 480px) {
    .whatsapp-btn {
        width: 48px;
        height: 48px;
        bottom: var(--space-md);
        right: var(--space-md);
    }

    .whatsapp-btn__icon {
        width: 24px;
        height: 24px;
    }
}