body{
    background-color: rgba(1,112,7,0.7);
}
 h1 {
  font-size: 2.3em;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgb(9,1,120);
  font-weight: bold;
  text-align: center;
}
h2 {
  font-size: 2.5em;
  color: rgb(9,1,120);
  text-align: center;
}
p {
  font-size: 1.7em;
  color: #FFF;
  font-weight: bold;
  text-align: center;
}

footer, .diapo { 
  display: flex;
  justify-content: center;
}

footer {
  margin-top: 1em;
}
a {
  font-size: 1.7em;
  text-decoration: none;
  color: #FFF;
  font-weight: bold;
}
video {
  width: 50em;
  height: 30em;
}

@media screen and (max-width: 399px) {
  h1 {
  font-size: 1.1em;
  }
  h2, p {
    font-size: 1em;
  }
  video {
    width: 16em;
    height: 17em;
  }
  a {
    font-size: 1em;
  }
}
@media screen and (min-width: 400px) and (max-width: 599px) {
  h1 {
  font-size: 1.5em;
  }
  h2 {
  font-size: 1.4em;
  }
  p {
   font-size: 1.3em;
  }
  video {
    width: 25em;
    height: 13em;
  }
    
 } 
@media screen and (min-width: 600px) and (max-width: 799px) {
  h1 {
  font-size: 2em;
  }
  h2 {
    font-size: 1.8em;
   }
 
  video {
    width: 37em;
    height: 23em;
  }
  p {
    font-size: 1.6em;
  }
}