* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.hima-wrap {
  width: 90%;
  max-width: 600px;
  min-height: 300px;
  margin: 0 auto;
  padding: 10px;
  font-size: 18px;
  background-color: #fff;
  border: 1px solid #ccc;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.hima-wrap .game-title {
  font-size: 1.5em;
  margin-bottom: 30px;
}
.hima-wrap #himaStartBtn {
  display: block;
  width: 80%;
  background-color: #2e7d32;
  border: 1px solid #2e7d32;
  color: #fff;
  margin-bottom: 30px;
  padding: 12px 24px;
  font-size: 1.2em;
  border-radius: 5px;
  transition: all 0.2s;
  cursor: pointer;
}
.hima-wrap #himaStartBtn:hover, .hima-wrap #himaStartBtn:focus {
  background-color: #388e3c;
  border-color: #388e3c;
  color: #fff;
}
.hima-wrap #himaResult {
  margin: 0;
  font-size: 1.2em;
}