#fcb-container { position: fixed; bottom: 20px; right: 20px; z-index: 9999; }
#fcb-toggle {
    width: 50px; height: 50px; border-radius: 50%; text-align:center; line-height:50px;
    font-size:28px; cursor:pointer; background:var(--fcb-toggle-color); color:#fff; box-shadow:0 4px 8px rgba(0,0,0,0.2);
}
#fcb-items { display:flex; flex-direction:column; margin-bottom:10px; }
.fcb-button {
    display:block; margin-bottom:10px; width:50px; height:50px; border-radius:50%;
    text-align:center; line-height:50px; font-size:24px; opacity:0; transform:translateY(20px);
    transition:transform 0.3s,opacity 0.3s;
}
.fcb-button.show { transform:translateY(0); opacity:1; }
.fcb-button.bottom-left { right:auto; left:20px; }