.button {
  cursor: pointer;
  width: 100px;
  text-align: center;
  padding: 5px;
  margin-top: 1em;
  background-color: #fff;
  border-top: 3px solid #888;
  border-left: 3px solid #888;
  border-bottom: 3px solid #444;
  border-right: 3px solid #444;
}

.log {
  margin-top: 1em;
  border: 1px solid #888;
  padding: 5px;
}

.stage {
  margin: 10px 0;
  position: relative;
  border: 1px solid #000;
  background-color: #fff;
  width: 800px;
  height: 20px;
  text-align: center;
}
.sprite {
  position: absolute;
  left: 1px;
  top: 1px;
  background-color: #000;
  width: 8px;
  height: 18px;
}

.target {
  border: 1px solid #000;
  width: 300px;
  margin-top: 1em;
  padding: 3px;
}