main.css

#main {
  width: 600px;
  margin: 0 auto;
  text-align: center;
}
#flashcards {
  width: 600px;
  height: 300px;
}
#prev, #next {
  height: 300px;
  line-height: 300px;
  font-size: 72px;
  width: 50px;
  text-decoration: none;
  color: black;
  text-align: center;
}
#prev:hover, #next:hover {
  background: #eee;
  color: #333;
}
#prev {
  float: left;
}
#next {
  float: right;
}
#flashcard {
  margin: 0 10px;
  padding: 20px;
  width: 438px;
  height: 258px;
  background: #ddd;
  float: left;
  border: 1px solid black;
  border-radius: 5px;
  text-align: center;
  position: relative;
}
#index {
  position: absolute;
  top: 10px;
  right: 10px;
}
#word {
  font-size: 36px;
  font-weight: bold;
  margin-top: 70px;
}
#defn {
  font-size: 20px;
  font-style: italic;
  margin-top: 20px;
}