#myVideo {
  position: fixed;
  z-index: -1;
  right: 0;
  bottom: 0;
  min-width: 100%;
  min-height: 100%;
}

body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 2em;
}

h1 {
  color: #333;
  font-size: 2em;
}

h3 {
  color: white;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 1);
  font-size: 1.2em;
}

input[type="text"] {
  padding: 0.5em;
  border: none;
  border-radius: 5px;
  box-shadow: 0 0 15px 4px rgba(0,0,0,0.4);
}

input[type="button"], button {
  background-image: url('/img/download.png');
  border-radius: 5px;
  padding: 10px 20px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
  margin: 4px 2px;
  cursor: pointer;
  transition-duration: 0.4s;
}

input[type="button"]:hover, button:hover {
  background-color: #2980b9;
}

input:focus {
  border: none;
  outline: none;
}

#btnAsync {
  background-color: blue;
  color: white;
}

#btnAsync:hover {
  background-color: darkblue;
}