.page-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0;
    background: var(--gradient-primary);
    z-index: 10000;
    pointer-events: none;
    box-shadow: 0 0 10px var(--primary-shadow, rgba(0, 0, 0, 0.25));
    opacity: 0;
    transition: opacity 200ms ease-out;
}

.page-progress.active {
    opacity: 1;
    animation: page-progress-fill 8s cubic-bezier(0.1, 0.6, 0.2, 1) forwards;
}

@keyframes page-progress-fill {
    0% { width: 0; }
    100% { width: 92%; }
}