.page-content {
  background-color: #bebebe;
}
.page-content .game-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 30px;
}
.page-content .game-container .wrapper {
  box-sizing: content-box;
  width: 900px;
  padding: 3px;
  box-shadow: inset 3px 3px 0px #7b7b7b, inset -3px -3px 0px #fefefe;
}
.page-content .game-container .mine-sweeper-controller {
  margin: 10px;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  color: white;
  font-size: 20px;
}
.page-content .game-container .mine-sweeper-controller > * {
  flex: 1;
}
.page-content .game-container .mine-sweeper-controller > :last-child {
  display: flex;
  justify-content: end;
}
.page-content .game-container .mine-sweeper-controller .start-btn {
  display: flex;
  justify-content: center;
}
.page-content .game-container .mine-sweeper-controller .start-btn button {
  background-color: transparent;
  border: none;
  line-height: 1;
  font-size: 30px;
}
.page-content .game-container .mine-sweeper-body {
  width: 900px;
}
.page-content .game-container .mine-sweeper-body .mine-item {
  width: 30px;
  height: 30px;
  align-content: center;
  text-align: center;
}
.page-content .game-container .mine-sweeper-body .mine-item.mine-item-open {
  background-image: url(/assets/images/e3096c432c0bc1ec0278.png);
  background-repeat: no-repeat;
  background-size: cover;
}
.page-content .game-container .mine-sweeper-body .mine-item.mine-item-close {
  background-image: url(/assets/images/258d853f7e083bfa9295.png);
  background-repeat: no-repeat;
  background-size: cover;
}
.page-content .game-container .mine-sweeper-body .mine-item.is-mine {
  color: red;
}
.page-content .game-container .mine-sweeper-body .mine-item span {
  line-height: 30px;
  margin: 0;
  color: blue;
  font-size: 18px;
  font-weight: bold;
  cursor: default;
  user-select: none;
}
.page-content .game-container .mine-sweeper-body .mine-item.flag-error {
  position: relative;
}
.page-content .game-container .mine-sweeper-body .mine-item.flag-error::before,
.page-content .game-container .mine-sweeper-body .mine-item.flag-error::after {
  content: '';
  position: absolute;
  background-color: black;
  left: 15px;
  width: 2px;
  height: 30px;
}
.page-content .game-container .mine-sweeper-body .mine-item.flag-error::before {
  transform: rotate(45deg);
}
.page-content .game-container .mine-sweeper-body .mine-item.flag-error::after {
  transform: rotate(-45deg);
}