body {
  margin: 0;
  font-family: 'Segoe UI';
  background: radial-gradient(circle, #0f2027, #203a43);
  color: white;
  text-align: center;
}

.screen {
  display: none;
  height: 100vh;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.active {
  display: flex;
}

.logo {
  width: 150px;
  margin-bottom: 10px;
}

button {
  padding: 12px 20px;
  margin: 10px;
  border: none;
  border-radius: 10px;
  background: #00c6ff;
  color: black;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  transform: scale(1.1);
}

#board {
  display: grid;
  gap: 10px;
  margin: 20px;
}

.tile {
  width: 80px;
  height: 80px;
  background: linear-gradient(145deg, #00c6ff, #0072ff);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 24px;
  border-radius: 12px;
  cursor: pointer;
  transition: 0.2s;
}

.tile:hover {
  transform: scale(1.05);
}

.empty {
  background: transparent;
}

.top-bar {
  display: flex;
  gap: 20px;
  font-size: 18px;
}