:root{--bg-body:#e0f2f7;--bg-content:#ffffff;--text-primary:#1a1a1a;--text-secondary:#4a5568;--text-tertiary:#555555;--border:#cbd5e1;--shadow:rgba(0, 0, 0, 0.08);--accent:#2563eb;--accent-light:#dbeafe;--accent-hover:#1d4ed8;--tag-bg:#f1f5f9}[data-theme=dark]{--bg-body:#0a1929;--bg-content:#1e293b;--text-primary:#e5e7eb;--text-secondary:#9ca3af;--text-tertiary:#a1a8b3;--border:#334155;--shadow:rgba(0, 0, 0, 0.3);--accent:#3b82f6;--accent-light:#1e3a5f;--accent-hover:#60a5fa;--tag-bg:#334155}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;line-height:1.6;color:var(--text-primary);background:var(--bg-body);transition:background .3s,color .3s;min-height:100vh}@font-face{font-family:-apple-system;font-display:swap}@font-face{font-family:'Font Awesome 6 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