:root{--background-color:#f8f9fa;--text-color:#333333;--card-background:#ffffff;--card-text-color:#333333;--border-color:#686868;--hover-color:#f5f7fa;--link-color:#4299e1;--shadow-color:rgba(0, 0, 0, 0.1);--tooltip-background:rgba(0, 0, 0, 0.7);--tooltip-text:#ffffff;--toggle-icon:'🌙';--secondary-text:#555555;--header-background:#f8f9fa;--node-stroke:#ffffff}.dark-theme{--background-color:#111827;--text-color:#ffffff;--card-background:#1f2937;--card-text-color:#e5e7eb;--border-color:#374151;--hover-color:#7e848e;--link-color:#60a5fa;--shadow-color:rgba(0, 0, 0, 0.5);--tooltip-background:rgba(0, 0, 0, 0.8);--tooltip-text:#ffffff;--toggle-icon:'☀️';--secondary-text:#d1d5db;--header-background:#1a202c;--node-stroke:#1f2937}.theme-toggle{position:fixed;top:20px;left:20px;z-index:1000;background-color:var(--card-background);color:var(--text-color);border:1px solid var(--border-color);border-radius:50%;width:40px;height:40px;font-size:18px;display:flex;justify-content:center;align-items:center;cursor:pointer;box-shadow:0 2px 5px var(--shadow-color);transition:all .3s ease}.theme-toggle:hover{transform:scale(1.1);box-shadow:0 4px 8px var(--shadow-color)}body,#rightCard,.content-header,#cardContent,.content-body,.node-tooltip,#zoomToggleBtn,.card-title,.content-header h3,.section-content,.canvas-footer{transition:background-color .3s ease,color .3s ease,border-color .3s ease}@supports(transition:all 0.3s ease){*{transition:all .3s ease}}