#middle {
  width: 100%;
  align-content: center;
  text-align: center;
  position: absolute;
  color: #000;
  top: 50%;
  left: 50%;
  padding: 15px;
  -ms-transform: translateX(-50%) translateY(-50%);
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}
#middle > * {
  margin: 0.5em 0;
}
body {
  font-family: Roboto;
  font-weight: lighter;
  font-size: large;
}
.pay {
  font-weight: normal;
  font-size: xx-large;
}
button {
  font-weight: normal;
  padding: 0.25em;
  background-color: #d3d3d3;
  font-size: medium;
  border: none;
  border-radius: 0.125em;
}
button:hover {
  background-color: #add8e6;
}
button:focus {
  outline: 0;
}
#laps {
  padding: 0;
  margin: 0;
  height: 0;
}
#laps li {
  list-style: none;
}
#laps li:first-child {
  font-weight: normal;
  font-size: x-large;
}
@media (min-width: 600px) {
  body {
    font-size: 25px;
  }
  button {
    font-size: 15px;
  }
  button {
    padding: 5px;
    border-radius: 2.5px;
  }
  #laps > li:first-child {
    font-size: 37.5px;
  }
  .pay {
    font-size: 75px;
  }
}
@media (min-width: 700px) {
  body {
    font-size: 35px;
  }
  button {
    font-size: 20px;
  }
  button {
    padding: 10px;
    border-radius: 5px;
  }
  #laps > li:first-child {
    font-size: 52.5px;
  }
  .pay {
    font-size: 105px;
  }
}
@media (min-width: 800px) {
  body {
    font-size: 45px;
  }
  button {
    font-size: 25px;
  }
  button {
    padding: 15px;
    border-radius: 7.5px;
  }
  #laps > li:first-child {
    font-size: 67.5px;
  }
  .pay {
    font-size: 135px;
  }
}