:root {
    --kto-size: 90px;
    --kto-bottom: 24px;
    --kto-side: 24px;
}

.kto-whatsapp {
    position: fixed;
    bottom: var(--kto-bottom);
    z-index: 99999;
    width: var(--kto-size);
    height: var(--kto-size);
    pointer-events: none;
}

.kto-whatsapp--right {
    right: var(--kto-side);
}

.kto-whatsapp--left {
    left: var(--kto-side);
}

.kto-whatsapp__link {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    min-width: 44px;
    min-height: 44px;
    border-radius: 50%;
    text-decoration: none;
    outline: none;
    pointer-events: auto;
    -webkit-tap-highlight-color: transparent;
}

.kto-whatsapp__image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    border: 0;
    transition: transform 180ms ease;
}

.kto-whatsapp__link:hover .kto-whatsapp__image {
    transform: scale(1.06);
}

.kto-whatsapp__link:focus-visible {
    outline: 3px solid currentColor;
    outline-offset: 5px;
}

.kto-whatsapp__tooltip {
    position: absolute;
    top: 50%;
    width: max-content;
    max-width: min(320px, 70vw);
    padding: 9px 12px;
    border-radius: 8px;
    background: #172033;
    color: #fff;
    font-size: 14px;
    line-height: 1.35;
    font-weight: 600;
    box-shadow: 0 5px 18px rgba(0, 0, 0, .18);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-50%) scale(.96);
    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
}

.kto-whatsapp--right .kto-whatsapp__tooltip {
    right: calc(100% + 12px);
}

.kto-whatsapp--left .kto-whatsapp__tooltip {
    left: calc(100% + 12px);
}

.kto-whatsapp__link:hover .kto-whatsapp__tooltip,
.kto-whatsapp__link:focus-visible .kto-whatsapp__tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) scale(1);
}

@media (max-width: 768px) {
    .kto-whatsapp {
        --kto-size: min(var(--kto-size), 78px);
        --kto-bottom: max(var(--kto-bottom), 16px);
        --kto-side: max(var(--kto-side), 16px);
    }

    .kto-whatsapp__tooltip {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .kto-whatsapp__image,
    .kto-whatsapp__tooltip {
        transition: none;
    }

    .kto-whatsapp__link:hover .kto-whatsapp__image {
        transform: none;
    }
}