.fcb_toolbar {
    position: fixed;
    bottom: 20px;
    z-index: 99999;
}
.fcb_toolbar_left {
    left: 15px;
}
.fcb_toolbar_right {
    right: 15px;
}
.fcb_toolbar ul {
    list-style: none;
    margin: 0;
    padding: 0;
}
.fcb_toolbar ul li {
    margin-bottom: 10px;
}
.fcb_toolbar ul li a {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    text-decoration: none;
}
.fcb_toolbar ul li a > div {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}
.fcb_toolbar ul li a > div svg,
.fcb_toolbar ul li a > div img {
    width: 100%;
    height: 100%;
}
.fcb_toolbar ul li a span {
    position: absolute;
    white-space: nowrap;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 13px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    pointer-events: none;
}
.fcb_toolbar_left ul li a span {
    left: 60px;
}
.fcb_toolbar_right ul li a span {
    right: 60px;
}
.fcb_toolbar_left ul li a span:after {
    content: '';
    position: absolute;
    top: 50%;
    left: -8px;
    transform: translateY(-50%);
    border: 8px solid transparent;
    border-right-width: 8px;
}
.fcb_toolbar_right ul li a span:after {
    content: '';
    position: absolute;
    top: 50%;
    right: -8px;
    transform: translateY(-50%) rotate(180deg);
    border: 8px solid transparent;
    border-right-width: 8px;
}
.fcb_toolbar ul li a:hover span {
    opacity: 1;
    visibility: visible;
}

/* Hiệu ứng */
@keyframes fcb_zoom {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}
@keyframes fcb_swing {
    0%, 100% { transform: rotate(0deg); }
    20% { transform: rotate(12deg); }
    40% { transform: rotate(-10deg); }
    60% { transform: rotate(6deg); }
    80% { transform: rotate(-4deg); }
}
@keyframes fcb_tada {
    0%, 100% { transform: scale(1) rotate(0); }
    10%, 20% { transform: scale(0.9) rotate(-3deg); }
    30%, 50%, 70%, 90% { transform: scale(1.1) rotate(3deg); }
    40%, 60%, 80% { transform: scale(1.1) rotate(-3deg); }
}
.animation_zoom { animation: fcb_zoom 1.6s ease-in-out infinite; }
.animation_swing { animation: fcb_swing 1.6s ease-in-out infinite; transform-origin: top center; }
.animation_tada { animation: fcb_tada 1.6s ease-in-out infinite; }

@media (max-width: 600px) {
    .fcb_toolbar ul li a {
        width: 44px;
        height: 44px;
    }
    .fcb_toolbar ul li a > div {
        width: 22px;
        height: 22px;
    }
}