* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Silkscreen", cursive;
}
body {
  min-height: 100vh;
  display: flex;justify-content: center;
}

.h1 {
  color: rgb(100, 100, 100);
  font-size: 1.5rem;
  padding: 1rem 0;
}

.plane {
  height: 35rem;
  width: 35rem;
  border: 0.25rem solid rgb(100, 100, 100);
  display: grid;
  grid-template-rows: repeat(20, 1fr);
  grid-template-columns: repeat(20, 1fr);
}

.snake {
  background: rgb(100, 100, 100);
  border: 0.15rem solid rgb(255, 255, 255);
}

.food {
  background: rgb(255, 0, 0);
  animation: food 0.6s ease-in-out infinite;
}

@keyframes food {
  0% {
    border: 0.15rem solid rgb(255, 255, 255);
  }
  50% {
    border: 0 solid rgb(255, 255, 255);
  }
  100% {
    border: 0.15rem solid rgb(255, 255, 255);
  }
}

.arrowkeys {
  background: rgb(126, 126, 126);
  border: none;
  color: #fff;
}

.forMobile {
  margin: .25rem 0;
  display: grid;
  justify-content: center;
  grid-template-columns: repeat(3, 2rem);
  grid-template-rows: repeat(3, 2rem);
  gap: 2px;
}

#arrowUp {
  grid-column-start: 2;
  grid-column-end: 2;
}

#arrowDown {
  grid-column-start: 2;
  grid-column-end: 2;
  grid-row-start: 3;
  grid-row-end: 2;
}

 #arrowleft {
  grid-column-start: 1;
  grid-column-end: 2;
}

.score {
  color: rgb(100, 100, 100)
}

@media (max-width: 500px) {
  .plane {
    height: 20rem;
    width: 20rem;
  }
}