body {
  font-family: Arial, sans-serif;
  text-align: center;
  background: #3c3c3c;
  color:white;
}

h1 {
  margin-top: 10px;
  font-size: 3.5rem;
  padding-left: 50px;
  margin-bottom: 5px;
}
label{
    font-size: 1.5rem;
}
#difficulty{
    background-color: rgb(67, 66, 66);
    border-radius: 5px;
    color: white;
    width:70px;
    height: 30px;
    margin-left:10px;
    margin-right: 10px;
}
#restart{
    background-color: #c7f9cc;
    width: 70px;
    height: 30px;
    border-radius: 5px;
    cursor: pointer;
    border: none;
}
.controls {
  margin: 15px;
}

.board {
  display: grid;
  padding-top: 50px;
  padding-left: 50px;
  background-color: rgb(205, 240, 240);
  grid-template-columns: repeat(3, 150px);
  grid-template-rows: repeat(3, 150px);
  gap: 5px;
  justify-content: center;
  margin: 20px auto;
  border: 2px solid #faf4f4;   /* 👈 thin border around the full grid */
  border-radius: 10px;
  width: fit-content;
  box-shadow: 0 0 15px rgba(117, 224, 243, 0.7);
}

.cell {
  width: 100px;
  height: 100px;
  background: white;
  border: 2px solid #f6f2f2;
  border-radius: 10px;
  font-size: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.3s;
}

/* Default hover (empty cells only) */
.cell:not(.filled):hover {
  background: #eee;
}

/* User hover color (only empty cells) */
.user-turn .cell:not(.filled):hover {
  background: #6de92f; /* light green */
}

/* AI hover color (only empty cells) */
.ai-turn .cell:not(.filled):hover {
  background: #cb1515; /* light red */
}

#status {
  font-size: 3rem;
  margin-top: 5px;
}
.user-move {
  background-color: #c7f9cc; /* light green */
  color: #2d6a4f; /* dark green text */
  box-shadow: 0 0 15px rgba(0, 255, 0, 0.7);
  transition: box-shadow 0.3s ease-in-out;
}

.ai-move {
  background-color: #f8d7da; /* light red/pink */
  color: #842029; /* dark red text */
  box-shadow: 0 0 15px  rgba(238, 99, 104, 0.7);
  transition: box-shadow 0.3s ease-in-out;
}