video {
  position: fixed;
  right: 0;
  bottom: 0;
  min-width: 100%;
  min-height: 100%;
  z-index: -10;
}


#header {
  display: flex;
  justify-content: center;
  background-color: azure;
 border-radius: 20px;
   
}

h1 {
  font-family: 'Roboto', sans-serif;
  font-size: 40px;
}



#btn-container {
  display: flex;
  justify-content: space-around;

} 

#btn {
  margin-top: 200px;
  background: azure; 
  padding: 25px;
  border: none;
  border-radius: 20px;
}

#btn:hover {
  background: linear-gradient(to right, #ACB6E5, #74ebd5); 
}

a {
  text-decoration: none;
  font-size: 25px;
  color: black;
  font-family: 'Roboto', sans-serif;
  font-weight: bolder;
}

@media all and (max-width: 500px) {
  video {
  position: fixed;
  right: 0;
  bottom: 0;
  min-width: 100%;
  min-height: 100%;
  z-index: -10;
  }

#btn {

  padding: 15px;
  border: none;
  border-radius: 20px;
}
}