/* -- SPA Progress Bar -- */
#spa-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    z-index: 99999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
}

#spa-progress.active {
    opacity: 1;
}

#spa-progress.done .spa-progress-bar {
    width: 100% !important;
    transition: width 0.2s;
}

.spa-progress-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--ps-accent, #B8E0C8), var(--ps-accent-hover, #D0F0DC));
    border-radius: 0 2px 2px 0;
    animation: spa-progress-anim 2s ease-in-out infinite;
    box-shadow: 0 0 8px var(--ps-glow-accent, rgba(184, 224, 200, 0.15));
}

@keyframes spa-progress-anim {
    0% { width: 0; }
    50% { width: 70%; }
    100% { width: 90%; }
}

/* -- Skeleton Loading -- */
.spa-skeleton {
    padding: 24px 0;
}

.skeleton-line {
    background: linear-gradient(90deg,
        var(--ps-bg-surface, #1A1A1A) 25%,
        var(--ps-bg-subtle, #222222) 50%,
        var(--ps-bg-surface, #1A1A1A) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    border-radius: 4px;
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* -- SPA Content Transition -- */
#spa-content {
    transition: opacity 0.3s ease, transform 0.3s ease;
}