*{
  margin : 0;
}



ul {
 padding:0;
 margin:0;
 list-style-type:none;
 }

li {
  display: inline-block;
 }

 ul {

  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: black;
}

li {
  color: white;
  float: left;
  padding : 10px;
}

.carousel {

  width: auto;
  height: 150px;
  margin: auto;
  padding: 55px;
  background-color: lightgray;
}

h2 {
 text-align: center;
 margin-bottom: 50px;
 margin-top: 50px;
}

span {
  font-size: 16px;
}


article {
    background-color:lightgray;
    height : 200px;
    width: 80%;
    margin-top: 20px;
    margin-left: auto;
    margin-right: auto;

}


hr {

  margin-top: 100px ;
}

h3 {
  text-align: center;
  margin-bottom: 30px;
  margin-top: 30px;
}

div.form {
    display: block;
    text-align: center;
  }

form {
  display: inline-block;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}

input, textarea, select, option {
  margin: 0;
  width: 500px;
  margin-top: 10px;
}

button  {

  float:right;
}



@media screen and (min-width: 961px) {

  article {

    height : 300px;
    width: 25%;
    padding : 15px ;
    margin: 20px;
    display: inline-block;

  }

  h3  {

    text-align: left;
    margin-bottom: 30px;
    margin-top: 30px;
  }

}