body {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  background-image: url("../images/Nashville_skyline_2009.jpg");
  background-size: cover;
}
main {
  flex: 1 0 auto;
  background-size: cover;
  background-position: center;
}
.center {
  text-align: center;
  margin: auto;
}
.picture {
  border-radius: 50%;
  border: 1px black solid;
}
.name {
  font-size: 8vw;
  text-shadow: steelblue 5px 5px;
}
.iframe {
  display: inline-block;
  text-align: center;
}
.btn {
  margin-bottom: 5px;
  border-radius: 40%;
  background-color: steelblue;
}
.modal {
  font-weight: bold;
  background-image: url("../images/ignasi_pattern_s.png");
}
.button {
  margin: 10px auto;
  text-align: center;
  border-radius: 5px;
  border: 2px solid rgba(0, 0, 0, .2);
  font-size: 13px;
  font-weight: bold;
  text-shadow: -1px -1px 0 rgba(0,0,0,0.3);
  color: #FFFFFF;
  background-color: steelblue;
  box-shadow: 2px 2px 5px darkgray;
}
.footer-img {
  height: 50px;
}

@media only screen and (max-device-width: 480px) {
/* define mobile specific styles come here */
  .footer-img {
    height: 150px;
  }
  .page-footer {
    height: 200px;
  }
  .footer-copyright {
    height: 200px;
  }
  .mobile-txt {
    font-size: 40px;
  }
  .mobile-modal {
    font-size: 29px;
  }
}