img.navBut { border: 2px solid; border-color: #0000ff }
h1.title { text-align: center;  color: #4040ff }
h3.topic { text-align: center }
h3.warning { font-weight: bold; text-align: center; background-color: yellow }
h5.blueNote { font-weight: bold; text-align: center; background-color: #80b2f3 }