/* Left column */
.column.left {
  float: left;
  width: 15%;
}

.main {
  float: left;
  width: 85%;
  background-color: aquamarine;
}

.button {
  width: 100%;
  padding: 0%;
  background-color: black;
}

.button.active {
  background-color: aquamarine;
  color: blue;
}

.button.inactive {
  background-color: burlywood;
  color: blue;
}