.bfc-floating-button {
    --bfc-color: #e53935;
    position: fixed;
    z-index: 99999;
    bottom: max(22px, env(safe-area-inset-bottom));
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    padding: .9rem 1.15rem;
    border: 2px solid rgba(255, 255, 255, .85);
    border-radius: 999px;
    background: var(--bfc-color);
    box-shadow: 0 6px 24px rgba(0, 0, 0, .24);
    color: #fff !important;
    font-size: 16px;
    font-weight: 700;
    line-height: 1.2;
    text-decoration: none !important;
    transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
}

.bfc-floating-button.bfc-right { right: 22px; }
.bfc-floating-button.bfc-left { left: 22px; }

.bfc-floating-button:hover,
.bfc-floating-button:focus-visible {
    filter: brightness(.92);
    box-shadow: 0 9px 28px rgba(0, 0, 0, .3);
    color: #fff !important;
    transform: translateY(-2px);
}

.bfc-floating-button:focus-visible {
    outline: 3px solid #fff;
    outline-offset: 3px;
}

@media (max-width: 600px) {
    .bfc-floating-button {
        right: 14px !important;
        bottom: max(14px, env(safe-area-inset-bottom));
        left: 14px !important;
        justify-content: center;
        padding: .85rem 1rem;
        font-size: 15px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .bfc-floating-button { transition: none; }
}