:root {
    --color-button: #f78400;
    --color-button-after: #f5f5f5;
    --color-button: #424246;
    --color-border: #373737;
  }
  
  * {
    margin: 0;
  }
  
  html {
    font-family: "Trebuchet MS", "Lucida Sans Unicode", "Lucida Grande",
      "Lucida Sans", Arial, sans-serif;
  }
  
  body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
  }
  
  button {
    cursor: pointer;
  }
  
  .grid {
    display: flex;
    flex-wrap: wrap;
    border: 2px solid var(--color-border);
    min-height: 200px;
    min-width: 200px;
  }
  
  .start-btn {
    position: relative;
    font-size: 1.15rem;
    font-weight: bold;
    background: var(--color-button);
    padding: 0.6rem 1rem;
    margin: 1rem 0;
    border: 0;
  }
  .start-btn::after {
    position: absolute;
    content: attr(data-content);
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    box-shadow: inset 0 0 2px var(--color-border);
    background-color: var(--color-button-after);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translate(-0.2rem, -0.2rem);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  }
  
  .start-btn:hover::after,
  .start-btn:focus::after {
    transform: translate(0);
  }
  
  .grid div {
    transition: transform 0.4s ease;
  }
  
  .food-item {
    transform: scale(1.15);
  }
  
  .keys-container {
    display: grid;
    grid-template-columns: 50px 50px 50px;
    grid-template-rows: auto;
    grid-template-areas:
      ".    up   ."
      "left down right";
    grid-gap: 10px;
    padding: 1rem;
  }
  
  .keys-container button {
    background-color: var(--color-button-after);
    border: none;
    padding: 0.5rem;
    box-shadow: 3px 3px 3px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
  }
  
  .keys-container button:focus {
    box-shadow: 1px 1px 1px rgba(0, 0, 0, 0.3);
  }
  
  #ArrowUp {
    grid-area: up;
  }
  
  #ArrowDown {
    grid-area: down;
  }
  
  #ArrowLeft {
    grid-area: left;
  }
  
  #ArrowRight {
    grid-area: right;
  }
  
  .shake {
    animation: shake 0.5s linear 1;
  }
  
  @keyframes shake {
    10%,
    90% {
      transform: translate3d(-1px, 0, 0);
    }
  
    20%,
    80% {
      transform: translate3d(2px, 0, 0);
    }
  
    30%,
    50%,
    70% {
      transform: translate3d(-4px, 0, 0);
    }
  
    40%,
    60% {
      transform: translate3d(4px, 0, 0);
    }
  }