#grid{
    /* display: flex;
    flex-wrap: wrap; */
    /* width: 400px;
    height: 300px;
    display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center; */
  margin:50px;
  display: grid;
  grid-template-columns: repeat(4, 100px); /* 4 columns */
  grid-gap: 5px;
}
/* #grid img {
    width: calc(25% - 10px); /* 4 images per row */
    /* height: auto; */
  /* }  */

  .card {
    width: 100px;
    height: 100px;
    background: lightgray;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    transition: background 0.3s;
  }
  
  .card.highlight {
    background: yellow; /* Highlight effect */
    border: 2px solid red;
  }

  .timer {
    font-size: 3rem;
    margin-bottom: 20px;
}