/**
 * Performance Optimization Styles
 * Supports virtual scrolling and optimized rendering
 */

/* Virtual Scroller */
.virtual-scroll-container {
    position: relative;
    overflow: hidden;
}

.virtual-scroll-viewport {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    will-change: transform;
}

/* Optimize table rendering */
#profileGrid {
    contain: layout style paint;
}

#profileGrid tbody tr {
    contain: layout style;
}

/* Incremental render progress indicator */
.render-progress {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    z-index: 1000;
    display: none;
}

.render-progress.active {
    display: block;
}

.render-progress-bar {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
    margin-top: 8px;
    overflow: hidden;
}

.render-progress-fill {
    height: 100%;
    background: #4caf50;
    transition: width 0.1s linear;
}

/* Performance optimized animations */
.rank-summary-card {
    will-change: transform;
    transition: transform 0.2s ease;
}

.rank-summary-card:hover {
    transform: translateY(-2px);
}

/* Reduce layout thrashing */
.profile-grid tbody tr {
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Smooth scroll */
#evaluationsList,
#profileGrid {
    scroll-behavior: smooth;
}

/* Loading skeleton for incremental rendering */
.skeleton-row {
    display: flex;
    align-items: center;
    padding: 12px;
    gap: 12px;
    animation: skeleton-pulse 1.5s ease-in-out infinite;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(
        90deg,
        #f0f0f0 25%,
        #e0e0e0 50%,
        #f0f0f0 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

.skeleton-content {
    flex: 1;
}

.skeleton-line {
    height: 16px;
    background: linear-gradient(
        90deg,
        #f0f0f0 25%,
        #e0e0e0 50%,
        #f0f0f0 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    border-radius: 4px;
    margin: 8px 0;
}

@keyframes skeleton-pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

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

/* GPU acceleration hints */
.optimized-render {
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Contain layout calculations */
.evaluation-item,
.rank-summary-card,
.profile-grid tr {
    contain: layout style;
}

/* Dark Mode Skeletons */
body.dark .skeleton-avatar,
body.dark .skeleton-line {
    background: linear-gradient(
        90deg,
        #1e293b 25%,
        #334155 50%,
        #1e293b 75%
    );
}