body {
  display: flex;
  justify-content: center;  /* horizontally center */
  align-items: center;      /* vertically center */
  height: 100vh;            /* full screen height */
  margin: 0;
  background-color: #f9f9f9;
  font-family: Arial, sans-serif;
}

.container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

h1 {
  font-size: 2em;
  margin-bottom: 20px;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 100px);
  grid-gap: 5px;
  margin: 20px auto;
}

.cell {
  width: 100px;
  height: 100px;
  background: #444;          /* darker gray */
  border: 2px solid #222;
  font-size: 2em;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  border-radius: 8px;
  color: white;              /* text visible */
}

.cell:hover {
  background: #666;          /* lighter on hover */
}

.cell.taken {
  background: #333;
  cursor: not-allowed;
}

button {
  margin: 10px;
  padding: 10px 15px;
  font-size: 1em;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}


#reset {
  background: #3c80e7;
  color: white;
}

#micBtn.inactive {
  background: #888;
  color: white;
}

#micBtn.active {
  background: #2eb7cc;
  color: white;
}