header div {
  line-height: 25px;
  margin-bottom: 30px;
}

menu {
  min-height: 600px;
  margin-right: 20px;
  border-right: 1px solid rgba(0, 0, 0, 0.2);

  .panel_button {
    margin: 8px;
    cursor: pointer;
    transition: margin 0.2s;

    &:hover {
      margin-left: 15px;
    }

    a {
      color: #333333;
    }
  }

  .glyphicon {
    margin: 5px;
  }
}

.panel_block:not(:last-child) {
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}