body {
  background: #121213;
  color: white;
  font-family: Arial, sans-serif;
  text-align: center;
}

img {
  margin-top: 20px;
  margin-bottom: 10px;
   mix-blend-mode: lighten;
}

h1 {
  margin-top: 20px;
  letter-spacing: 2px;
}

#board {
  margin-top: 30px;
}

.row {
  display: flex;
  justify-content: center;
  margin-bottom: 5px;
}

.cell {
  width: 60px;
  height: 60px;
  border: 2px solid #3a3a3c;
  margin: 2px;
  font-size: 28px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  text-transform: uppercase;
}

.correct {
  background-color: #538d4e;
  border: none;
}

.present {
  background-color: #b59f3b;
  border: none;
}

.wrong {
  background-color: #3a3a3c;
  border: none;
}

input {
  margin-top: 20px;
  padding: 10px;
  font-size: 20px;
  text-transform: uppercase;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  margin-left: 10px;
  cursor: pointer;
}

.popup {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(18, 18, 19, 0.9);
  display: none;
  align-items: center;
  justify-content: center;
}

.popup-box {
  background: #121213;
  border: 2px solid #3a3a3c;
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  width: 300px;
}

.popup-box h2 {
  margin-bottom: 10px;
}

.popup-box p {
  margin-bottom: 20px;
  color: #d7dadc;
}

.popup-box button {
  padding: 10px 20px;
  border: none;
  background: #538d4e;
  color: white;
  font-weight: bold;
  cursor: pointer;
  border-radius: 5px;
}

.popup-box button:hover {
  background: #6aaa64;
}