.container {
  text-align:center;
}

h3 {
  color:#174411;
}

.column {
  text-align:center;	/* Netscape alt und IE */
}

.column .main_table {
  text-align:left;
  margin-left:auto;
  margin-right:auto;
  background-color:#CCFFCC;
  border-collapse:collapse;
  border:1px solid black;
}

.column .main_table td {
  height:30px;
  padding:0px;
  padding-left:6px;
  border:1px solid black;
}

.column .main_table th {
  background-color:#339966;
  text-align:left;
  padding-left:6px;
}