/* 2048 Game - Styles */

.game-container { max-width: 500px; margin: 0 auto; }

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 1rem 1.5rem;
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.game-title { display: flex; align-items: center; gap: 0.75rem; }
.game-title h2 { font-size: 2rem; font-weight: 800; color: var(--primary-color); margin: 0; }

.score-container { display: flex; gap: 1rem; }
.score-box {
    background-color: var(--background-color);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    text-align: center;
    min-width: 80px;
}
.score-label { font-size: 0.7rem; text-transform: uppercase; color: var(--text-secondary); }
.score-value { font-size: 1.25rem; font-weight: 700; color: var(--text-primary); }

.game-board-container {
    background-color: #bbada0;
    padding: 15px;
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
    touch-action: none;
}

.game-board {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.cell {
    aspect-ratio: 1;
    background-color: rgba(238, 228, 218, 0.35);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    transition: transform 0.1s ease;
}

.tile {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    font-weight: 700;
    transition: transform 0.15s ease-in-out;
}

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

.cell.new { animation: appear 0.2s ease; }
.cell.merged { animation: pop 0.2s ease; }

@keyframes appear {
    0% { transform: scale(0); }
    100% { transform: scale(1); }
}

@keyframes pop {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.control-buttons { display: flex; gap: 1rem; justify-content: center; margin-bottom: 1.5rem; }

.instructions {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
}
.instructions h3 { font-size: 1rem; margin-bottom: 0.75rem; }
.instructions p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; }

.game-over-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: rgba(238, 228, 218, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}
.game-over-overlay.active { opacity: 1; visibility: visible; }
.game-over-text { font-size: 2rem; font-weight: 700; color: #776e65; margin-bottom: 1rem; }

.board-wrapper { position: relative; }

@media (max-width: 480px) {
    .game-board-container { padding: 10px; }
    .game-board { gap: 8px; }
    .cell { font-size: 1.5rem; border-radius: 4px; }
    .cell[data-value="128"], .cell[data-value="256"], .cell[data-value="512"] { font-size: 1.25rem; }
    .cell[data-value="1024"], .cell[data-value="2048"] { font-size: 1rem; }
    .game-header { flex-direction: column; gap: 1rem; }
    .score-container { width: 100%; justify-content: center; }
    .control-buttons { flex-direction: column; }
    .control-buttons .btn { width: 100%; }
}