body {
  background-color: #128855;
}
h1 {
  text-align: center;
}

.content{
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}


.container {
  background-color: white;
  min-height: 80vh;
  border-radius: 1rem;
  box-shadow: 0 0 10px black;
  padding: 5rem;
}

.timer {
  text-align: center;
}

#response-text {
  text-align: center;
}

#response-time {
  margin: 0 auto;
}

.diff-red { color: red; }