/* Floating WhatsApp button — bottom-left, stacked above scroll-to-top */
.whatsapp-float {
    position: fixed;
    bottom: 82px;
    bottom: calc(82px + env(safe-area-inset-bottom, 0px));
    left: 15px;
    left: calc(15px + env(safe-area-inset-left, 0px));
    z-index: 9998;
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background: #25d366;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    line-height: 1;
    text-decoration: none;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.whatsapp-float:hover,
.whatsapp-float:focus {
    color: #ffffff;
    text-decoration: none;
    transform: scale(1.06);
    box-shadow: 0 6px 22px rgba(37, 211, 102, 0.5);
}

.whatsapp-float:focus-visible {
    outline: 2px solid #ffffff;
    outline-offset: 3px;
}

@media screen and (max-width: 768px) {
    .whatsapp-float {
        width: 52px;
        height: 52px;
        font-size: 26px;
        bottom: 78px;
        bottom: calc(78px + env(safe-area-inset-bottom, 0px));
        left: 14px;
        left: calc(14px + env(safe-area-inset-left, 0px));
    }
}

@media screen and (max-width: 480px) {
    .whatsapp-float {
        width: 48px;
        height: 48px;
        font-size: 24px;
        bottom: 74px;
        bottom: calc(74px + env(safe-area-inset-bottom, 0px));
        left: 12px;
        left: calc(12px + env(safe-area-inset-left, 0px));
    }
}