#mat_background { position: absolute; left: 0px; top: 0px; z-index: 0; }

b { color: #000000; }

#left_content_1 { position: absolute; left: 20px; top: 60px; width: 380px; z-index: 0; }
#left_content_1 p { text-align: justify; }
#left_content_2 { position: absolute; left: 20px; top: 190px; width: 340px; z-index: 0; }
#left_content_2 p { text-align: justify; }
#left_content_3 { position: absolute; left: 160px; top: 390px; width: 370px; z-index: 0; }
#left_content_3 p { text-align: justify; }

#right_content_1 { position: absolute; left: 560px; top: 180px; width: 240px; z-index: 0; }
#right_content_1 p { text-align: justify; }
#right_content_2 { position: absolute; left: 710px; top: 370px; width: 240px; z-index: 0; }
#right_content_2 p { text-align: justify; }