*{
    margin: 0px;
    padding: 0px;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}
html, body { 
    overflow-x: hidden;
}
html {
    height: 100%;
}
h1{
    font-size: 30px;
}
h2{
    font-size: 24px;
}
h3{
    font-size: 18px;
}
footer{
    margin-top: auto;
}
article .container{
    flex: 1;
    padding: 20px 20px;
}
.navbar .navbar-nav {
    float: none;
    vertical-align: top;
  }
  
  .navbar .navbar-collapse {
    text-align: center;
  }