* Tooltip personalizado para botones de ShareThis */
.st-btn[data-tooltip] {
    position: relative;
}

.st-btn[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 12px;
    background: #1a1a1a;
    color: #fff;
    font-size: 12px;
    font-family: system-ui, -apple-system, sans-serif;
    border-radius: 4px;
    white-space: nowrap;
    margin-bottom: 8px;
    z-index: 10000;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    opacity: 0;
    animation: tooltipFadeIn 0.2s ease forwards;
    pointer-events: none;
}

/* Triangulito del tooltip */
.st-btn[data-tooltip]:hover::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: #1a1a1a;
    margin-bottom: -4px;
    z-index: 10000;
    opacity: 0;
    animation: tooltipFadeIn 0.2s ease forwards;
    pointer-events: none;
}

@keyframes tooltipFadeIn {
    to { opacity: 1; }
}