body {
  background: #232323;
  color: #fff;
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0;
  height: 100vh;
  justify-content: center;
}
h1 {
  margin-bottom: 10px;
}
#game-container {
  background: #333;
  border-radius: 10px;
  padding: 20px;
  box-shadow: 0 0 20px #0008;
  width: 340px;
  min-height: 360px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
#score {
  margin-bottom: 15px;
  font-size: 1.2em;
}
#grid {
  display: grid;
  grid-template-columns: repeat(4, 60px);
  grid-template-rows: repeat(4, 60px);
  gap: 10px;
  margin-bottom: 20px;
}
.tile {
  width: 60px;
  height: 60px;
  background: #444;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7em;
  font-weight: bold;
  transition: background 0.2s;
  cursor: pointer;
}
.tile.tango {
  background: #e63946;
  color: #fff;
  animation: pop 0.3s;
}
.tile.normal {
  background: #457b9d;
  color: #fff;
}
@keyframes pop {
  0% { transform: scale(1);}
  50% { transform: scale(1.2);}
  100% { transform: scale(1);}
}
#message {
  min-height: 32px;
  font-size: 1.1em;
  color: #ffd166;
}
#restart-btn {
  margin-top: 10px;
  padding: 8px 24px;
  background: #06d6a0;
  color: #222;
  border: none;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
  font-size: 1em;
  transition: background 0.2s;
}
#restart-btn:hover {
  background: #0fa67a;
}