.game-2048 {
  text-align: center;
  padding: 2rem;
}

.game-2048 h1 {
  margin-bottom: 2rem;
  font-size: 2.5rem;
}

.game-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 500px;
  margin: 0 auto 1rem;
}

.score-container {
  background: var(--card-bg);
  border: 2px solid var(--card-border-color);
  border-radius: 8px;
  padding: 0.75rem 1.5rem;
}

.score-label {
  font-size: 0.875rem;
  text-transform: uppercase;
  color: var(--text-muted-color);
  margin-bottom: 0.25rem;
}

.score {
  font-size: 1.5rem;
  font-weight: bold;
}

.reset-button, .retry-button {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  background: var(--link-color);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.reset-button:hover, .retry-button:hover {
  opacity: 0.8;
}

.instructions {
  max-width: 500px;
  margin: 0 auto 2rem;
  padding: 1rem;
  background: var(--card-bg);
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text-muted-color);
}

.grid-container {
  max-width: 500px;
  margin: 0 auto;
  position: relative;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  background: var(--card-border-color);
  border-radius: 10px;
  padding: 10px;
  position: relative;
}

.tile {
  aspect-ratio: 1;
  background: var(--card-bg);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: bold;
  transition: all 0.15s ease-in-out;
}

.tile[data-value="2"] { background: #eee4da; color: #776e65; }
.tile[data-value="4"] { background: #ede0c8; color: #776e65; }
.tile[data-value="8"] { background: #f2b179; color: #f9f6f2; }
.tile[data-value="16"] { background: #f59563; color: #f9f6f2; }
.tile[data-value="32"] { background: #f67c5f; color: #f9f6f2; }
.tile[data-value="64"] { background: #f65e3b; color: #f9f6f2; }
.tile[data-value="128"] { background: #edcf72; color: #f9f6f2; font-size: 1.75rem; }
.tile[data-value="256"] { background: #edcc61; color: #f9f6f2; font-size: 1.75rem; }
.tile[data-value="512"] { background: #edc850; color: #f9f6f2; font-size: 1.75rem; }
.tile[data-value="1024"] { background: #edc53f; color: #f9f6f2; font-size: 1.5rem; }
.tile[data-value="2048"] { background: #edc22e; color: #f9f6f2; font-size: 1.5rem; }

.game-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--card-bg);
  border: 2px solid var(--card-border-color);
  border-radius: 12px;
  padding: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.game-message.hidden {
  display: none;
}

.game-message p {
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 1rem;
  color: var(--text-color);
}

.game-message-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.submit-score-button {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  background: #f39c12;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.submit-score-button:hover {
  opacity: 0.8;
}

@media (max-width: 600px) {
  .grid-container {
    max-width: 350px;
  }

  .tile {
    font-size: 1.5rem;
  }

  .tile[data-value="128"],
  .tile[data-value="256"],
  .tile[data-value="512"] {
    font-size: 1.25rem;
  }

  .tile[data-value="1024"],
  .tile[data-value="2048"] {
    font-size: 1rem;
  }
}