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

html,
body {
  background-color: rgb(19, 19, 19);
  color: white;
  height: 100%;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

body::-webkit-scrollbar {
  display: none;
}

.outer-container {
  display: flex;
  height: 100%;
  justify-content: center;
}

.container {
  display: flex;
  flex-direction: column;
  padding: 20px;
  width: 920px;
}

.header {
  margin-bottom: 20px;
  position: relative;
}

.title {
  padding: auto 5px;
  text-align: center;
}

.button {
  border: solid rgb(39, 39, 39);
  cursor: pointer;
  padding: 5px 10px;
}

.button:hover,
.open {
  background-color: rgb(39, 39, 39);
  border-color: rgb(39, 39, 39);
  border-radius: 4px;
}

.header > .button {
  border: solid rgb(19, 19, 19);
  border-bottom: solid white;
  bottom: 0;
  display: inline-block;
  position: absolute;
  right: 0;
  z-index: 1;
}

.header > .button:hover,
.active.button {
  background-color: rgb(19, 19, 19);
  border: solid white;
  border-bottom: solid rgb(39, 39, 39);
  border-radius: 4px 4px 0 0;
}

.game-info {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
  position: relative;
}

.value {
  border-bottom: solid rgb(39, 39, 39);
  display: inline-block;
  padding: 5px;
}

.hover-text {
  background-color: rgb(19, 19, 19);
  border: solid rgb(39, 39, 39) 3px;
  border-radius: 4px;
  cursor: pointer;
  display: none;
  padding: 5px 10px;
  position: absolute;
  right: 90px;
  top: 0;
  min-width: 200px;
  z-index: 3;
}

.hover-text::after {
  border-color: transparent transparent transparent rgb(39, 39, 39);
  border-style: solid;
  border-width: 5px;
  content: "";
  margin-top: -5px;
  position: absolute;
  top: 50%;
  right: -13px;
}

.hover-text.animate {
  -webkit-animation: lifecycle 5s;
  animation: lifecycle 5s;
  cursor: pointer;
  display: inline-block;
}

.hover-text.animate:hover {
  opacity: 1;
}

.game-container {
  flex: auto;
  position: relative;
}

.game-box {
  bottom: 0;
  left: 0;
  overflow: auto;
  position: absolute;
  right: -8px;
  top: 0;
}

.game-box::-webkit-scrollbar {
  height: 8px;
  width: 8px;
}

.game-box::-webkit-scrollbar-track {
  background: rgb(39, 39, 39);
}

.game-box::-webkit-scrollbar-thumb {
  background: #888;
}

.game-box::-webkit-scrollbar-thumb:hover {
  background: #555;
}

.game-box::-webkit-scrollbar-corner {
  background: #888;
}

.game-content {
  display: flex;
  flex-wrap: wrap;
  margin: auto;
}

.game-content.center {
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
}

.mine {
  background-color: rgb(168, 168, 168);
  color: black;
  cursor: default;
  height: 40px;
  line-height: 40px;
  margin: 2px;
  width: 40px;
}

.mine:not(.bomb):hover,
.checked {
  background-color: rgb(224, 224, 224);
}

.bomb {
  background-color: rgb(231, 39, 39);
}

.footer {
  background-color: rgb(11, 11, 11);
  padding: 50px 0;
}

.modal-bg,
.modal {
  align-items: center;
  display: none;
  justify-content: center;
}

.modal-bg {
  background-color: rgba(0, 0, 0, 0.4);
  bottom: 0;
  left: 0;
  position: fixed;
  right: 0;
  top: 0;
}

.heavy-bg {
  z-index: 10;
}

.modal {
  background-color: rgb(19, 19, 19);
  border: solid rgb(39, 39, 39);
  height: 350px;
  position: relative;
  width: 300px;
  z-index: 1;
}

.modal > .button:first-child {
  padding: 6px;
  position: absolute;
  right: 20px;
  top: 20px;
}

.settings-form {
  padding: 30px;
}

.settings-form > label {
  display: block;
  margin: 0 auto 30px;
  padding: 10px;
}

.performance > * {
  margin: 50px auto;
}

.modal .button:last-child {
  width: 150px;
}

.hint-box {
  background-color: rgb(26, 26, 26);
  border: 1px solid #d3d3d3;
  box-shadow: 0 0 8px 1px rgb(19, 19, 19);
  display: none;
  left: 40vw;
  position: fixed;
  text-align: center;
  top: 10vh;
  width: 200px;
  z-index: 2;
}

.draggable-div,
.close-hint {
  border: solid 1px rgb(160, 160, 160);
  position: absolute;
  top: -1px;
}

.draggable-div {
  background-color: rgb(19, 19, 19);
  border-width: 1px;
  cursor: move;
  height: 55px;
  left: -1px;
  line-height: 55px;
  width: 161px;
  z-index: 3;
}

.close-hint {
  cursor: pointer;
  height: 40px;
  line-height: 40px;
  right: -1px;
  width: 40px;
}

.close-hint:hover {
  background-color: rgb(19, 19, 19);
}

.hint-text {
  font-size: 18px;
  margin: 65px auto 10px;
}

@media only screen and (max-width: 630px) {
  .title {
    text-align: left;
  }
}

@-webkit-keyframes lifecycle {
  0% {
    opacity: 0;
  }
  35% {
    opacity: 1;
  }
  65% {
    opacity: 1;
  }
  100% {
    display: none;
    opacity: 0;
  }
}

@keyframes lifecycle {
  0% {
    opacity: 0;
  }
  20% {
    opacity: 1;
  }
  80% {
    opacity: 1;
  }
  100% {
    display: none;
    opacity: 0;
  }
}