/**
 * Back to Top Button Styles
 * Datei: assets/css/back-to-top.css
 */

.reader-tools-back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: #4b5563;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 9998;
}

.reader-tools-back-to-top:hover {
    transform: translateY(0);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.reader-tools-back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.reader-tools-back-to-top svg {
    width: 24px;
    height: 24px;
}

@media (max-width: 768px) {
    .reader-tools-back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

.reader-tools-back-to-top:focus {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

/* Barrierefreiheit: Bewegung reduzieren */
@media (prefers-reduced-motion: reduce) {
    .reader-tools-back-to-top {
        transition: none !important;
    }

    .reader-tools-back-to-top:hover,
    .reader-tools-back-to-top.visible {
        transform: none !important;
    }

    html {
        scroll-behavior: auto !important;
    }
}