@media screen and (max-width: 480px) {
  iframe {
    width: 100%;
  }
    img {
    width: 100%;
  }
}

 body {background-color: black;}
  
  h1 {color: red;
      font-size: 50pt;
  }
  p {color: white;
      font-size: 25pt;
  }
  .bigger {
      font-size:40pt;
  }
  .center {
  margin: auto;
  width: 90%;
  padding: 10px;
  text-align: center;
}
a:link {
  color: pink;
  background-color: transparent;
  text-decoration: none;
}

a:visited {
  color: pink;
  background-color: transparent;
  text-decoration: none;
}

a:hover {
  color: red;
  background-color: transparent;
  text-decoration: underline;
}

a:active {
  color: red;
  background-color: transparent;
  text-decoration: underline;
}

.container {
  position: relative;
  overflow: hidden;
  width: 75%;
  padding-top: 56.25%; /* 16:9 Aspect Ratio (divide 9 by 16 = 0.5625) */
}

/* Then style the iframe to fit in the container div with full height and width */
.responsive-iframe {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  width: 100%;
  height: 100%;
}