.boton-whatsapp-fijo {
    position: fixed;
    right: 60px;
    bottom: 60px;
    z-index: 9999;
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: linear-gradient(145deg, #25D366, #20B859);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: transform .25s ease, box-shadow .25s ease;
    box-shadow: 0 10px 24px rgba(0, 0, 0, .22);
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
}

.boton-whatsapp-fijo:hover {
    transform: scale(1.06) translateY(-2px);
    box-shadow: 0 14px 28px rgba(0, 0, 0, .28);
}

.whatsapp-icon-wrapper {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 0;
}

.whatsapp-icon {
    width: 36px;
    height: 36px;
    display: block;
}

.boton-whatsapp-fijo::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, .22), transparent 58%);
    pointer-events: none;
}

@media (max-width: 768px) {
    .boton-whatsapp-fijo {
        right: 18px;
        bottom: 90px;
        width: 60px;
        height: 60px;
    }

    .whatsapp-icon {
        width: 32px;
        height: 32px;
    }
}