header {
    padding-top: 10%;
    padding-bottom:5%;
    text-shadow: 2px 2px white;
}

body {
    font-family: 'Nunito';
    background-color: lightgray;
 
}

section {
    opacity:90%;
}

.container {
    text-align: center;
    width: 50%;
}

.card-body {
    padding-top: 30px;
    padding-bottom: 30px;
    margin-top: 20px;
    margin-bottom: 20px;
}

.phone {
    width: 42rem;
}

@media screen and (max-width: 800px) {
    header, body, section, .container, .card-body, .phone {
      min-width: 100%;
      float: left;
      width: 10rem;
    }
  }