:root{--bg-primary: #f0f2f5;--bg-card: #ffffff;--bg-input: #ffffff;--text-primary: #1e293b;--text-secondary: #7f8c8d;--border-color: #e5e7eb;--shadow: 0 2px 5px rgba(0, 0, 0, .08)}[data-theme=dark]{--bg-primary: #0f172a;--bg-card: #1e293b;--bg-input: #334155;--text-primary: #e2e8f0;--text-secondary: #94a3b8;--border-color: #334155;--shadow: 0 2px 8px rgba(0, 0, 0, .3)}body{background-color:var(--bg-primary);color:var(--text-primary);transition:background-color .3s,color .3s;margin:0}