/* Reading Progress Bar */
.reading-progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(0, 0, 0, 0.1);
    z-index: 9999;
}

.reading-progress-bar {
    height: 100%;
    background: var(--fenix-red);
    width: 0%;
    transition: width 0.3s ease;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px; /* Posicionado en la parte inferior derecha */
    background-color: var(--fenix-red);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.back-to-top:hover {
    background-color: #b81e21;
    color: white;
    transform: translateY(-3px);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top i {
    font-size: 18px;
}