html {
  background: url(beach.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

body {
  font-family: Sans-Serif;
}

h1 {
  text-align: center;
}

.container {
  display: flex;
  align-items: center;
  justify-content: center;
}

.column {
  flex-direction: column;
}

.duck {
}

.buttons {
  margin-top: 2em;
}

button {
  width: 100%;
  background-color: #6988d6;
  border: none;
  color: white;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  margin: 4px 2px;
  cursor: pointer;
  font-size: 20px;
}

#transcript {
  background: rgba(255, 255, 255, 0.4);
  color: rgba(20, 20, 20, 0.9);
}

.floating { 
  animation-name: floating;
  animation-duration: 3s;
  animation-iteration-count: infinite;
  animation-timing-function: ease-in-out;
  margin-left: 30px;
  margin-top: 5px;
}
 
@keyframes floating {
  0% { transform: translate(0,  0px); }
  50%  { transform: translate(0, 15px); }
  100%   { transform: translate(0, -0px); }   
}