.nav a {
  color: #5a5a5a;
  font-size: 11px;
  font-weight: bold;
  padding: 14px 10px;
  text-transform: uppercase;
}

.nav li {
  display: inline;
}

.intro{
    background-color : #f7f7f7;
    border-bottom : 1px solid #dbdbdb;
}

.intro h2{
    color : #393c3d;
    font-size : 30px;
}

.intro h4{
    text-decoration: underline;
}

.intro p{
    margin-bottom : 13px;
}

.mechanical{
    background-color: #ffffff;
    border-bottom : 1px solid #dbdbdb;
}

.mechanical h2{
    color : #393c3d;
    font-size : 30px;
}

.mechanical h4{
    text-decoration: underline;
}

.mechanical p{
    margin-bottom : 13px;
}

.electronic{
    background-color: #f7f7f7;
    border-bottom : 1px solid #dbdbdb;
}

.electronic h2{
    color : #393c3d;
    font-size : 30px;
}

.electronic h4{
    text-decoration: underline;
}

.electronic p{
    margin-bottom : 13px;
}

.programming{
    background-color: #ffffff;
    border-bottom : 1px solid #dbdbdb;
}

.programming h2{
    color : #393c3d;
    font-size : 30px;
}

.programming h4{
    text-decoration: underline;
}

.programming p{
    margin-bottom : 13px;
}

.videos{
    background-color: #f7f7f7;
    border-bottom : 1px solid #dbdbdb;
}

.videos h2{
    color : #393c3d;
    font-size : 30px;
}

.videos h4{
    text-decoration: underline;
}

.videos h5{
    text-decoration: underline;
}

.videos p{
    margin-bottom : 13px;
}

.license{
	background-color: #f7f7f7;
    border-bottom : 1px solid #dbdbdb;
}

.license p{
    text-align: center;
}