#iru-area {
  position: relative;
  height: 140px;
  overflow: hidden;
  background: #fff;

  max-width: 600px;   /* sectionと揃える */
  margin: 0 auto;     /* 中央寄せ */
}

#road {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 200%;
  height: 40px;
  background-image: url("/tools/iru/img/grassland.png");
  background-repeat: repeat-x;
  background-size: auto 100%;
  background-position-x: 0;
}

#chara-wrap {
  position: absolute;
  bottom: 40px;
  left: 60px;
}

#chara {
  width: 48px;
  display: block;
}

#light {
  position: absolute;
  top: -48px;
  left: 50%;
  transform: translateX(-50%, -12px);
  width: 24px;
  display: none;
}

#light-btn {
  position: absolute;
  right: 16px;
  bottom: 8px;
  border: 1px solid #cccccc;
  border-radius: 6px;
  padding: 3px;
  cursor: pointer;
  box-shadow: 0 2px 0 #bbbbbb;
}

#light-btn:hover {
  background: #f7f7f7;
}

#light-btn:active {
  transform: translateY(2px);
  box-shadow: 0 0 0 #bbbbbb;
}

#light-btn img {
  width: 16px;
  display: block;
}

.walking {
  animation: hop 0.6s infinite ease-in-out;
}

@keyframes hop {
  0%   { transform: translateY(0); }
  50%  { transform: translateY(-6px); }
  100% { transform: translateY(0); }
}