body {
  background-color: black;
  font-family: Arial, Helvetica, sans-serif;
  color:  white;
  text-align: center;
}

#response{
  font-size: 25px;
}

#prevCorrect{
  margin-top: 15px;
  color: gray;
}

#signature{
  color: darkgray;
}

#citation{
  margin-top: 10px;
  color: gray;
}

button {
  background-color: #4CAF50;
  border: none;
  color: white;
  border-radius: 8px;
  display: block;
  padding: 15px 32px;
  text-align: center;
  text-decoration: none;
  margin-top: 20px;
  margin-bottom: 5px;
  margin-left: auto;
  margin-right: auto;
  width: 25%;
  font-size: 16px;
}

#selector_wrapper {
  margin: auto;
  background-color: #0f0f0f;
  height: 20%;
  width: 80%;
  border-radius: 8px;
  padding: 10px;
}

#top_wrapper {
  margin: auto;
  background-color: #0f0f0f;
  height: 20%;
  width: 80%;
  border-radius: 8px;
  padding: 10px;
}

#citation_wrapper {
  margin: auto;
  margin-top: 20px;
  background-color: #0f0f0f;
  height: 20%;
  width: 80%;
  border-radius: 8px;
  padding: 10px;
}

#text_wrapper {
    margin: auto;
    background-color: #0f0f0f;
    height: 20%;
    width: 80%;
    border-radius: 8px;
    padding: 10px;
}


footer{
  color: gray;
}

@media only screen and (max-device-width: 480px) {

  body{
    
  }  
  button {
    background-color: #4CAF50;
    border: none;
    color: white;
    border-radius: 8px;
    display: block;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    margin-bottom: 5px;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
    font-size: 16px;
  }

  #selector_wrapper {
    margin: auto;
    background-color: #0f0f0f;
    height: 20%;
    width: 80%;
    border-radius: 8px;
    padding: 10px;
  }

  #top_wrapper {
    margin: auto;
    background-color: #0f0f0f;
    height: 20%;
    width: 80%;
    border-radius: 8px;
    padding: 10px;
  }

  #citation_wrapper {
    margin: auto;
    margin-top: 20px;
    background-color: #0f0f0f;
    height: 20%;
    width: 80%;
    border-radius: 8px;
    padding: 10px;
  }

  #button_wrapper {
    position: absolute;
    width: 100%;
    display: flex;
    justify-content: center; 
    bottom: 15%; 
  }
}