:root{--bg-color: #eef2f6;--header-bg: #ffffff;--text-color: #1e293b;--text-secondary: #64748b;--card-bg-1: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);--card-border: rgba(255, 255, 255, .5);--shadow-color: rgba(148, 163, 184, .15);--shadow-hover: rgba(148, 163, 184, .25);--primary-color: #6366f1;--primary-hover: #4f46e5}body.dark-theme{--bg-color: #0f172a;--header-bg: #1e293b;--text-color: #f1f5f9;--text-secondary: #94a3b8;--card-bg-1: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);--card-border: rgba(255, 255, 255, .05);--shadow-color: rgba(0, 0, 0, .3);--shadow-hover: rgba(0, 0, 0, .5);--primary-color: #818cf8;--primary-hover: #6366f1}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);transition:background-color .3s,color .3s;min-height:100vh}