.bs-docs-featurette{
  padding-top: 5%;
}

navbar-nav li:active{
  background: blue;
}

#mainheader {
  background: orange;
}

#button_submit {
  background-color: black;
  color: white;
  border: 3px solid orange;
  padding: 10px 30px;
  text-align: center;
  display: inline-block;
  font-size: 16px;
  border-radius: 12px;
}

#button_submit:hover {
  background-color: orange;
  color: black;
}