style.css

body {
  color: rgb(75, 83, 119);
  background-color: rgb(235, 235, 235);
  font-family: "Roboto", sans-serif;
  font-size: 18px;
  line-height: 1.1;
}

h1, h2, h3 {
  font-family: "Roboto", sans-serif;
  color: rgb(0, 56, 139);
  font-size: 22px;
  line-height:0.9;
}

h1 {
  font-size: 34;
}

#profile-pic {
  width: 150px;
  height: 150px;
}

.img-circle {
  border-radius: 50%;
}

.button-blue {
  text-decoration: none;
  background-color: #135ca1;
  color: rgb(255, 255, 255);
  padding: 15px;
  border-radius: 5px;
  box-shadow: 0 0 16px rgba(0, 0, 0, 0.1);
}

.button-blue:hover {
  background-color: #1e9ddc;
  transition: 0.3s;
}

.social-links {
  color: #135ca1;
  text-decoration: none;
  font-size: 45px;
  font-weight: bold;
  padding: 6px;
}

.social-links:hover {
  color: #1e9ddc;
  transition: 0.3s;
}

.card {
  background-color: white;
  padding: 30px;
  margin: 25px auto;
  border-radius: 7px;
  border: 1px solid #EAEAEA;
  box-shadow: 0 10px 30px rgba(0,0,0,.1);
}

.container {
  width: 500px;   /* This sets the width */
  margin: 0 auto; /* This automatically sets left/right margins */
  text-align: center;
}

@media (max-width: 720px) {
  /* For a screen < 960px, this CSS will be read */
  .container {
    width: 400px;
  }
}

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