.card-header {
  background-color: white;
  border: 1px dashed black;
}
.card {
  margin-bottom: 8px;
}
iframe {
  display: block;
  margin: auto;
}
@media only screen and (max-width: 1000px) {
  iframe {
    display: block;
    margin: auto;
    -moz-transform: scale(0.6, 0.6); 
    -webkit-transform: scale(0.6, 0.6); 
    -o-transform: scale(0.6, 0.6);
    -ms-transform: scale(0.6, 0.6);
    transform: scale(0.6, 0.6); 
    -moz-transform-origin: top left;
    -webkit-transform-origin: top left;
    -o-transform-origin: top left;
    -ms-transform-origin: top left;
    transform-origin: top left;
  }
}
.glow {
  color: #212529;
  text-align: center;
  -webkit-animation: glow 1s ease-in-out infinite alternate;
  -moz-animation: glow 1s ease-in-out infinite alternate;
  animation: glow 1s ease-in-out infinite alternate;
}

@-webkit-keyframes glow {
  from {
    text-shadow: 0 0 10px #fbff99, 0 0 20px #fbff99, 0 0 30px #fbff99, 0 0 40px #fbff99, 0 0 50px #fbff99, 0 0 60px #fbff99, 0 0 70px #fbff99;
  }
  to {
    text-shadow: 0 0 20px #ffd927, 0 0 30px #ffd927, 0 0 40px #ffd927, 0 0 50px #ffd927, 0 0 60px #ffd927, 0 0 70px #ffd927, 0 0 80px #ffd927;
  }
}