/* Reading Progress Bar */
#reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    z-index: 9999;
    transition: width 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    #reading-progress-bar {
        background: linear-gradient(90deg, #4facfe 0%, #00f2fe 100%);
    }
}

/* Hide on mobile for better UX */
@media (max-width: 768px) {
    #reading-progress-bar {
        height: 3px;
    }
}