:root {
    --whatsapp-green: #25d366;
    --whatsapp-hover: #1fb45a;
    --whatsapp-dark: #128c7e;
}

.whatsapp-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
}

.whatsapp-fab-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.whatsapp-fab-text {
    background: #0a7bc2;
    color: white;
    padding: 12px 20px;
    border-radius: 30px 0 0 30px;
    font-family: 'Inter', -apple-system, sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(10, 123, 194, 0.3);
    line-height: 1.4;
    
    opacity: 0;
    transform: translateX(20px);
    pointer-events: none;
    max-width: 0;
    overflow: hidden;
    transition: all 0.4s ease;
}

.whatsapp-fab-text strong {
    display: block;
    font-weight: 600;
    margin-bottom: 2px;
}

.whatsapp-fab-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    min-width: 60px;
    min-height: 60px;
    max-width: 60px;
    max-height: 60px;
    background: var(--whatsapp-green);
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
    transition: all 0.3s ease;
    flex-shrink: 0;
    overflow: hidden;
}

.whatsapp-fab-button svg {
    width: 32px !important;
    height: 32px !important;
    min-width: 32px;
    min-height: 32px;
    max-width: 32px;
    max-height: 32px;
    fill: white;
    flex-shrink: 0;
}

.whatsapp-fab-link:hover .whatsapp-fab-text {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
    max-width: 300px;
    padding: 12px 20px;
}

.whatsapp-fab-link:hover .whatsapp-fab-button {
    background: var(--whatsapp-hover);
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
}

.whatsapp-fab-link:active .whatsapp-fab-button {
    transform: scale(0.95);
}

.whatsapp-fab.pulse .whatsapp-fab-button {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
    }
    50% {
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.7), 
                    0 0 0 10px rgba(37, 211, 102, 0.1);
    }
}

/* Tablets */
@media (max-width: 768px) {
    .whatsapp-fab {
        bottom: 20px;
        right: 20px;
    }

    .whatsapp-fab-text {
        font-size: 0.85rem;
        padding: 10px 16px;
    }

    .whatsapp-fab-button {
        width: 56px;
        height: 56px;
        min-width: 56px;
        min-height: 56px;
        max-width: 56px;
        max-height: 56px;
    }

    .whatsapp-fab-button svg {
        width: 28px !important;
        height: 28px !important;
        min-width: 28px;
        min-height: 28px;
        max-width: 28px;
        max-height: 28px;
    }
}

/* Móviles */
@media (max-width: 640px) {
    .whatsapp-fab {
        bottom: 16px;
        right: 16px;
    }

    .whatsapp-fab-text {
        display: none;
    }

    .whatsapp-fab-button {
        width: 60px;
        height: 60px;
        min-width: 60px;
        min-height: 60px;
        max-width: 60px;
        max-height: 60px;
    }

    .whatsapp-fab-button svg {
        width: 32px !important;
        height: 32px !important;
        min-width: 32px;
        min-height: 32px;
        max-width: 32px;
        max-height: 32px;
    }
}

/* Animación de entrada */
.whatsapp-fab.animate-in {
    animation: slideInRight 0.6s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(100px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}