style.css

.noteclassic, .noteimportant, .notewarning, .notetip {
  margin: 2em;
  margin-left: auto;
  margin-right: auto;
  width: 70% !important;
  min-height: 40px;
  clear: both;
  text-align: justify;
  vertical-align: middle;
  border-collapse: collapse;
  padding: 15px 20px 15px 80px;
  background-position: 20px 50%;
  background-repeat: no-repeat;
  -moz-border-radius: 20px;
  -khtml-border-radius: 20px;
  border-radius: 20px;
}
 
.noteclassic {
  /*border: 1px solid #99D;*/
  background-color: #eef;
  background-image: url(images/note.png);
}
 
.noteimportant {
  /*border: 1px solid #ff0;*/
  background-color: #ffc;
  background-image: url(images/important.png);
}
 
.notewarning {
  /*border: 1px solid #d99;*/
  background-color: #fdd;
  background-image: url(images/warning.png);
}
 
.notetip {
  /*border: 1px solid #9d9;*/
  background-color: #dfd;
  background-image: url(images/tip.png);
}