.whatsapp-widget {
    position: fixed;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    bottom: var(--whatsapp-widget-desktop-bottom, 25px);
    right: var(--whatsapp-widget-desktop-right, 25px);
    left: var(--whatsapp-widget-desktop-left, auto);
    pointer-events: auto;
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.whatsapp-widget.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.whatsapp-widget-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    min-width: 56px;
    height: 56px;
    min-height: 56px;
    border-radius: 50%;
    border: none;
    padding: 0;
    background-color: #25d366;
    color: #fff;
    text-decoration: none;
    box-shadow: 0 20px 40px rgba(37, 211, 102, 0.25);
    transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
    position: relative;
    overflow: hidden;
}

.whatsapp-widget-button::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.24);
    opacity: 0;
    transform: scale(0.8);
    transition: transform 0.4s ease, opacity 0.4s ease;
}

.whatsapp-widget-button:focus-visible,
.whatsapp-widget-button:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 24px 48px rgba(37, 211, 102, 0.3);
    outline: none;
}

.whatsapp-widget-button:active::after {
    opacity: 1;
    transform: scale(1.8);
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.whatsapp-widget-icon {
    font-size: 1.45rem;
}

.whatsapp-widget-label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

.whatsapp-widget-tooltip {
    max-width: 240px;
    padding: 0.85rem 1rem;
    border-radius: 18px;
    background-color: rgba(18, 18, 18, 0.95);
    color: #fff;
    font-size: 0.95rem;
    line-height: 1.4;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.18);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
    pointer-events: none;
}

.whatsapp-widget:hover .whatsapp-widget-tooltip,
.whatsapp-widget-tooltip.visible {
    opacity: 1;
    transform: translateY(0);
}

.whatsapp-widget-size-small .whatsapp-widget-button {
    width: 48px;
    height: 48px;
    min-width: 48px;
    min-height: 48px;
}

.whatsapp-widget-size-large .whatsapp-widget-button {
    width: 70px;
    height: 70px;
    min-width: 70px;
    min-height: 70px;
}

@media (max-width: 768px) {
    .whatsapp-widget {
        bottom: var(--whatsapp-widget-mobile-bottom, 90px);
        right: var(--whatsapp-widget-mobile-right, 20px);
        left: var(--whatsapp-widget-mobile-left, auto);
    }

    .whatsapp-widget-tooltip {
        position: absolute;
        bottom: 100%;
        right: 0;
        left: auto;
        margin-bottom: 0.75rem;
        width: calc(100vw - 48px);
        max-width: 260px;
    }
}

@media (max-width: 576px) {
    .whatsapp-widget-tooltip {
        width: calc(100vw - 40px);
        font-size: 0.9rem;
    }
}