.cfb-btn {
    position: fixed;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    will-change: transform;
    contain: layout style;
}

.cfb-btn:hover,
.cfb-btn:focus-visible {
    transform: scale(1.1);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3);
    outline: 3px solid #fff;
    outline-offset: 2px;
}

.cfb-btn--call {
    color: #fff;
}

.cfb-btn--whatsapp {
    background-color: #25d366;
    color: #fff;
}

.cfb-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
    .cfb-btn {
        transition: none;
        will-change: auto;
    }
}