body {
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  // background: #f0f0f0;
  background-color: rgba(133, 255, 189, 0.5);
  background-image: linear-gradient(45deg, rgba(133, 255, 189, 0.5) 0%, rgba(255, 251, 125, 0.5) 100%);
  background-opacity
}
#score-board {
  display: flex;
  justify-content: space-between;
  width: 90%;
  // margin-bottom: 50px;
  font-size: 2em;
  font-weight: bold;
}
#game-container {
  perspective: 750px;
  cursor: move;
}
#game-board {
  width: 250px;
  height: 250px;
  transform-style: preserve-3d;
  transition: transform 0.1s;
  user-select: none;
}
.plane {
  position: absolute;
  width: 250px;
  height: 250px;
  border: 2px solid #333;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: repeat(5, 1fr);
  background: rgba(255, 255, 255, 0.4);
}
.cell {
  border: 1px solid #666;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2em;
  cursor: pointer;
}
#controls {
  margin-top: 20px;
  text-align: center;
}
#status {
  display: flex;
  justify-content: space-between;
  width: 90%;
  margin-top: 50px;
  font-size: 1.2em;
  font-weight: bold;
}
nav {
  position: absolute;
  display: inline-block;
  top: 10px;
  left: 0;
}
#menuToggle {
  display: block;
  position: relative;
  top: 50px;
  left: 50px;
  z-index: 1;
  -webkit-user-select: none;
  user-select: none;
}
#menuToggle a {
  text-decoration: none;
  color: #232323;
  transition: color 0.3s ease;
}
#menuToggle a:hover {
  color: tomato;
}
#menuToggle input#close {
  display: block;
  width: 40px;
  height: 32px;
  position: absolute;
  top: -7px;
  left: -5px;
  cursor: pointer;
  opacity: 0; /* hide this */
  z-index: 2; /* and place it over the hamburger */
  -webkit-touch-callout: none;
}
#menuToggle span {
  display: block;
  width: 33px;
  height: 4px;
  margin-bottom: 5px;
  position: relative;
  background: #232323;
  border-radius: 3px;
  z-index: 1;
  transform-origin: 4px 0px;
  transition: transform 0.5s cubic-bezier(0.77,0.2,0.05,1.0),
              background 0.5s cubic-bezier(0.77,0.2,0.05,1.0),
              opacity 0.55s ease;
}
#menuToggle span:first-child {
  transform-origin: 0% 0%;
}
#menuToggle span:nth-last-child(2) {
  transform-origin: 0% 100%;
}
#menuToggle input:checked ~ span {
  opacity: 1;
  transform: rotate(45deg) translate(-2px, -1px);
  background: #232323;
}
#menuToggle input:checked ~ span:nth-last-child(3) {
  opacity: 0;
  transform: rotate(0deg) scale(0.2, 0.2);
}
#menuToggle input:checked ~ span:nth-last-child(2) {
  transform: rotate(-45deg) translate(0, -1px);
}
#menu {
  position: absolute;
  display: inline-block;
  margin: -100px 0 0 -50px;
  padding: 50px;
  padding-top: 125px;
  background: #ddd;
  list-style-type: none;
  -webkit-font-smoothing: antialiased;
  transform-origin: 0% 0%;
  transform: translate(-100%, 0);
  transition: transform 0.5s cubic-bezier(0.77,0.2,0.05,1.0);
}
#menu li {
  padding: 10px 0;
  font-size: 22px;
  text-wrap: nowrap;
}
#menuToggle input:checked ~ ul {
  transform: none;
}
#menu li p {
  padding: 10px;
  font-size: 18px;
  text-wrap: wrap;
  color: #555;
  border: solid #000 1px;
}