.copy-tooltip {
    position: absolute;
    background: #222;
    color: #fff;
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 6px;
    top: -25px;
    right: 0;
    opacity: 0;
    animation: fadeInOut 1.5s ease;
}
@keyframes fadeInOut {
    0% { opacity: 0; transform: translateY(5px); }
    10% { opacity: 1; transform: translateY(0); }
    90% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(-5px); }
}