A thin wire carrying a steady current \(I\) lies in the \(xy\)-plane. The wire extends along the negative \(x\)-axis from \(x = -\infty\) to the origin \((0,0)\), turns \(90^\circ\), and continues along the positive \(y\)-axis from the origin to \(y = +\infty\). The unit vector \(\hat{k}\) points out of the page in the \(+z\)-direction. What is the net magnetic field \(\vec{B}\) at point \(P\) located at coordinates \((d, d)\), where \(d > 0\)?