/**
 * Scroll-nach-oben-Button (includes/scroll_to_top.php)
 */

.scroll-to-top {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 2.75rem;
    height: 2.75rem;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: var(--color-primary, #2563eb);
    color: white;
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
    z-index: 1000;
}
.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}
.scroll-to-top:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.5);
}
.scroll-to-top:active {
    transform: translateY(0);
}