/* SNA Visualization Performance Optimizations */

/* Loading indicator - GPU accelerated */
.layout-loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) translateZ(0);
    z-index: 1000;
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    opacity: 0;
    transition: opacity 0.3s ease;
    will-change: opacity;
    backdrop-filter: blur(4px);
}

.layout-loading-indicator.visible {
    opacity: 1;
}

.layout-loading-indicator::before {
    content: 'Calculating Layout...';
    margin-right: 12px;
}

.layout-loading-indicator::after {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
    margin-left: 8px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Network graph performance optimizations */
#sna-network-graph {
    /* GPU acceleration for smoother interactions */
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
    
    /* Optimize for touch devices */
    touch-action: pan-x pan-y;
    
    /* Better text rendering */
    text-rendering: optimizeSpeed;
    
    /* Optimize image rendering for nodes */
    image-rendering: optimizeSpeed;
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: optimize-contrast;
    
    /* Improve scrolling performance */
    -webkit-overflow-scrolling: touch;
}

/* Large graph optimization mode */
.graph-optimized-mode {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    z-index: 900;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateZ(0);
}

/* Performance hints for browsers */
.cytoscape-container {
    contain: layout style paint;
    will-change: transform;
}

/* Optimize node rendering for large graphs */
.cy-node {
    will-change: transform;
}

.cy-edge {
    will-change: transform;
}

/* Optimize loading states */
.network-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(27, 25, 25, 0.9);
    z-index: 999;
    backdrop-filter: blur(2px);
}

.network-loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

/* Memory optimization for large datasets */
.sna-container {
    contain: strict;
}

/* Improve rendering performance for animations */
@media (prefers-reduced-motion: reduce) {
    .layout-loading-indicator,
    .layout-loading-indicator::after,
    .network-loading-spinner {
        animation: none;
    }
    
    .layout-loading-indicator::after {
        border-top-color: rgba(255, 255, 255, 0.8);
    }
}

/* Optimize for high DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    #sna-network-graph {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Mobile-specific optimizations */
@media (max-width: 768px) {
    .layout-loading-indicator {
        font-size: 0.9rem;
        padding: 12px 20px;
    }
    
    .layout-loading-indicator::before {
        margin-right: 8px;
    }
    
    .layout-loading-indicator::after {
        width: 14px;
        height: 14px;
        margin-left: 6px;
    }
    
    .graph-optimized-mode {
        font-size: 0.75rem;
        padding: 4px 8px;
        top: 5px;
        right: 5px;
    }
    
    /* Optimize touch interactions */
    #sna-network-graph {
        touch-action: manipulation;
    }
}

/* Very small screens */
@media (max-width: 480px) {
    .layout-loading-indicator {
        font-size: 0.8rem;
        padding: 10px 16px;
    }
    
    .layout-loading-indicator::before {
        content: 'Loading...';
    }
}

/* High performance mode for weak devices */
@media (max-width: 768px) and (max-height: 1024px) {
    #sna-network-graph {
        /* Reduce quality for better performance on mobile */
        image-rendering: pixelated;
        transform: translate3d(0, 0, 0);
    }
}