.whatsapp-float {
    position: fixed;
    left: 24px;
    bottom: 24px;
    z-index: 1000;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    border-radius: 999px;
    background: #25d366;
    box-shadow: 0 4px 14px rgba(0, 0, 0, .22);
    color: #fff;
    font-family: Hind, sans-serif;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.2;
    text-decoration: none;
    transition: background-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.whatsapp-float:hover,
.whatsapp-float:focus {
    background: #128c7e;
    box-shadow: 0 6px 18px rgba(0, 0, 0, .28);
    color: #fff;
    text-decoration: none;
    transform: translateY(-2px);
}

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

.whatsapp-float svg {
    width: 22px;
    height: 22px;
    flex: 0 0 22px;
    fill: currentColor;
}

.back-to-top {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 50%;
    background: #17bed2;
    box-shadow: 0 4px 14px rgba(0, 0, 0, .22);
    color: #fff;
    font-size: 0;
    line-height: 1;
    text-decoration: none;
    transition: background-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

.back-to-top:hover,
.back-to-top:focus {
    background: #0f9aa8;
    box-shadow: 0 6px 18px rgba(0, 0, 0, .28);
    color: #fff;
    text-decoration: none;
    transform: translateY(-2px);
}

.back-to-top:focus-visible {
    outline: 3px solid #17bed2;
    outline-offset: 3px;
}

.back-to-top svg {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 2;
}

@media (max-width: 768px) {
    .whatsapp-float {
        left: 16px;
        bottom: 16px;
        padding: 11px 15px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .whatsapp-float,
    .back-to-top {
        transition: none;
    }
}