body {
            margin: 0;
            background: #0a0e14;
            font-family: Arial, sans-serif;
            color: white;
            overflow: hidden;
        }
        #container {
            width: 100vw;
            height: 100vh;
        }
        .node rect {
            fill: #1e293b;
            stroke: #333;
            stroke-width: 1.5px;
            cursor: pointer;
        }
        .node:hover rect {
            fill: #2d3748;
            stroke: #60a5fa;
            stroke-width: 2px;
        }
        .node text {
            fill: #f9fafb;
            font-size: 10px;
            text-anchor: middle;
            pointer-events: none;
            font-weight: 500;
        }
        .link {
            stroke: #334155;
            stroke-width: 1.5px;
            fill: none;
            opacity: 0.4;
        }
        .relationship-node rect {
            fill: #0f1419;
            stroke: #475569;
        }
        .relationship-node text {
            fill: #94a3b8;
            font-size: 7px;
            font-style: italic;
            font-weight: 400;
        }
        #header {
            position: fixed;
            top: 20px;
            left: 20px;
            z-index: 1000;
        }
        .search-result-item {
            padding: 8px 12px;
            cursor: pointer;
            border-bottom: 1px solid #1e293b;
            font-size: 11px;
            color: #f9fafb;
        }
        .search-result-item:hover {
            background: #1e293b;
        }
        .search-result-item:last-child {
            border-bottom: none;
        }