.characters {
  display: flex;
  gap: 40px;
  margin-bottom: 20px;
}

.character {
  text-align: center;
}

.icon {
  font-size: 50px;
  margin-bottom: 10px;
}

.hp-bar-background {
  width: 150px;
  height: 20px;
  background: #ddd;
  border-radius: 10px;
  overflow: hidden;
  margin: 0 auto 5px auto;
}

.hp-bar {
  height: 100%;
  background: red;
  width: 100%; /* 初期100% */
  transition: width 0.5s ease;
  border-radius: 10px 0 0 10px;
}