style.css

@import url("http://fonts.googleapis.com/css?family=Open+Sans:400,300,700|Poppins:300,400,500,700");

body {
  background-color: #D8E4FF;
  font-family: Open-sans;
  color: rgb(70,70,70);
  font-size:20px;
  line-height:20px;
  text-align: center;
  margin: 20 auto;
}

@media (max-width: 960px) {
  /* For a screen < 960px, this CSS will be read */
  .container {
    width: 700px;
  }
}
@media (max-width: 720px) {
  /* For a screen < 720px, this CSS will be read */
  .container {
    width: 500px;
  }
}
@media (max-width: 540px) {
  /* For a screen < 540px, this CSS will be read */
  .container {
    width: 300px;
  }
}

h1 {
  color:navy blue;
  font-size: 40px;
  font-family: arial;
}

a {
  color: rgb(70,70,70);
  text-decoration: none ;
}

img {
  border-radius: 50%;
  width: 228px;
}

li {
  text-align: center;
   display: -webkit-inline-box;
   list-style: none;
   letter-spacing: 50px;
   padding-right: 0px;
   padding-left: 50px;
   color: "blue";
   font-size: 40px;
   margin: 20px;
}

.card {
    background-color: #E9F0FF;
    padding: 40px;
    box-shadow: 0px 10px 30px rgba(0,0,0,0.1);
    border-radius: 4px;
    text-align: center;
    width: 1000px;
    margin: 20px auto;
}

.button-dark {
 text-align: center;
 background: #767D8C;
 padding: 10px;
 margin: 20px
}