.fsb-container {
    position: fixed;
    z-index: 9999;
    display: flex;
    flex-direction: column-reverse;
    gap: 12px;
}

.fsb-container.bottom-right {
    right: 20px;
    bottom: 20px;
}

.fsb-container.bottom-center {
    left: 50%;
    transform: translateX(-50%);
    bottom: 20px;
}

.fsb-container.bottom-left {
    left: 20px;
    bottom: 20px;
}

.fsb-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-radius: 30px;
    color: #fff;
    text-decoration: none;
    box-shadow: 0 8px 20px rgba(0, 0, 0, .25);
    transition: transform .3s ease, box-shadow .3s ease;
}

.fsb-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, .35);
}

.fsb-icon {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fsb-label {
    font-size: 14px;
    white-space: nowrap;
}

/* Device visibility */
@media (max-width: 768px) {
    .fsb-desktop {
        display: none;
    }
}

@media (min-width: 769px) {
    .fsb-mobile {
        display: none;
    }
}