/* Responsive Design for Mobile Devices */

@media (max-width: 600px) {
    body {
        padding: 5px;
        align-items: flex-start;
        padding-top: 10px;
    }
    
    .game-selection {
        padding: 15px;
        margin: 5px;
        border-radius: 15px;
    }
    
    .main-title {
        font-size: 1.6em;
        margin-bottom: 8px;
    }
    
    .main-subtitle {
        font-size: 0.9em;
        margin-bottom: 20px;
    }
    
    .games-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 15px;
    }
    
    .game-card {
        padding: 15px;
        border-radius: 12px;
    }
    
    .game-title {
        font-size: 1.3em;
        margin-bottom: 8px;
    }
    
    .game-desc {
        font-size: 0.8em;
    }
    
    .game-container {
        padding: 12px;
        margin: 0;
        border-radius: 15px;
        width: 100%;
        max-width: 100vw;
        box-sizing: border-box;
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .game-info {
        width: 100%;
        margin-bottom: 12px;
    }
    
    .game-header {
        margin-bottom: 8px;
        flex-direction: row;
        padding: 0;
    }
    
    .game-title-section {
        flex: 1;
    }
    
    .game-title {
        font-size: 1.3em;
        margin-bottom: 2px;
    }
    
    .game-subtitle {
        font-size: 0.75em;
        margin-bottom: 5px;
    }
    
    .back-btn {
        padding: 6px 12px;
        font-size: 12px;
        border-radius: 15px;
    }
    
    .mobile-instructions {
        background: #e2e8f0;
        padding: 6px;
        border-radius: 6px;
        font-size: 12px;
        color: #4a5568;
        margin-bottom: 8px;
        text-align: center;
    }
    
    .control-section {
        gap: 8px;
    }
    
    .primary-controls {
        gap: 8px;
    }
    
    .status-info {
        gap: 10px;
    }
    
    .btn {
        padding: 7px 12px;
        font-size: 12px;
        min-height: 34px;
        border-radius: 17px;
        white-space: nowrap;
    }
    
    .game-board {
        width: min(85vw, 85vh);
        height: calc(min(85vw, 85vh) * 1.25);
        border-width: 4px;
        margin: 0 auto;
    }
    
    .gomoku-board, .sudoku-board, .puzzle2048-board {
        width: min(90vw, 90vh);
        height: min(90vw, 90vh);
    }
    
    .sudoku-cell {
        font-size: 1em;
        min-height: 25px;
    }
    
    .puzzle2048-cell {
        font-size: 1.5em;
        min-height: 40px;
    }
    
    .puzzle2048-cell.tile-128,
    .puzzle2048-cell.tile-256,
    .puzzle2048-cell.tile-512 {
        font-size: 1.2em;
    }
    
    .puzzle2048-cell.tile-1024,
    .puzzle2048-cell.tile-2048 {
        font-size: 1em;
    }
    
    .piece {
        font-size: 10px;
        border-width: 1px;
        border-radius: 4px;
    }
    
    .moves-counter {
        font-size: 12px;
        padding: 5px 10px;
    }
    
    .difficulty-selector {
        padding: 10px;
        margin-bottom: 15px;
    }
    
    .difficulty-title {
        font-size: 0.9em;
        margin-bottom: 8px;
    }
    
    .difficulty-btn {
        padding: 6px 12px;
        font-size: 11px;
    }
    
    .ai-mode-toggle {
        padding: 8px;
        margin-bottom: 12px;
    }
    
    .ai-toggle-btn {
        padding: 6px 16px;
        font-size: 12px;
    }
    
    .victory-content {
        padding: 15px;
        max-width: 90vw;
    }
    
    .victory-title {
        font-size: 1.6em;
        margin-bottom: 10px;
    }
    
    .victory-stats {
        font-size: 1em;
        margin: 10px 0;
    }
    
    .victory-content .btn {
        margin: 5px;
        padding: 10px 16px;
        font-size: 14px;
    }
    
    .drag-instructions {
        display: block;
    }
    
    /* Audio controls mobile optimization */
    .audio-controls {
        flex-direction: column;
        gap: 10px;
        padding: 10px;
        margin-top: 15px;
    }
    
    .volume-control {
        gap: 8px;
    }
    
    .volume-slider {
        width: 80px;
    }
    
    .audio-btn {
        min-width: 40px;
        min-height: 40px;
        font-size: 1.1em;
    }
    
    /* Notification system mobile optimization */
    .notification-container {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
    }
    
    .notification {
        margin-bottom: 10px;
        border-radius: 8px;
        padding: 12px 16px;
    }
    
    .notification-title {
        font-size: 0.9em;
    }
    
    .notification-message {
        font-size: 0.8em;
    }
    
    .confirmation-content {
        padding: 20px;
        margin: 10px;
    }
    
    .confirmation-title {
        font-size: 1.2em;
    }
    
    .confirmation-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .confirmation-buttons .btn {
        width: 100%;
    }
}

@media (max-width: 400px) {
    .game-container {
        padding: 8px;
    }
    
    .game-title {
        font-size: 1.1em;
    }
    
    .game-subtitle {
        font-size: 0.65em;
    }
    
    .back-btn {
        padding: 5px 10px;
        font-size: 11px;
    }
    
    .btn {
        padding: 6px 10px;
        font-size: 11px;
        min-height: 30px;
    }
    
    .game-board {
        width: min(90vw, 90vh);
        height: calc(min(90vw, 90vh) * 1.25);
        border-width: 3px;
    }
    
    .piece {
        font-size: 9px;
    }
    
    .moves-counter {
        font-size: 11px;
        padding: 4px 8px;
    }
}

/* Landscape orientation optimization - keep vertical layout */
@media (max-width: 900px) and (orientation: landscape) {
    body {
        padding: 5px;
        align-items: flex-start;
        padding-top: 8px;
    }
    
    .game-container {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 8px;
        max-width: 100vw;
        max-height: 100vh;
        box-sizing: border-box;
    }
    
    .game-info {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .game-header {
        margin-bottom: 8px;
    }
    
    .game-title {
        font-size: 1.1em;
        margin-bottom: 2px;
    }
    
    .game-subtitle {
        font-size: 0.65em;
    }
    
    .back-btn {
        padding: 5px 10px;
        font-size: 11px;
    }
    
    .drag-instructions {
        font-size: 10px;
        padding: 4px;
        margin-bottom: 6px;
    }
    
    .control-section {
        gap: 6px;
    }
    
    .primary-controls {
        gap: 8px;
    }
    
    .game-board, .gomoku-board, .sudoku-board, .puzzle2048-board {
        width: min(80vw, 60vh);
        height: min(80vw, 60vh);
        margin: 0 auto;
    }
    
    .game-board {
        height: calc(min(80vw, 60vh) * 1.25);
    }
    
    .direction-controls {
        margin-top: 6px;
        max-width: 120px;
    }
}

/* Ultra-compact mode for very small screens */
@media (max-width: 320px) {
    body {
        padding: 2px;
    }
    
    .game-container {
        padding: 5px;
    }
    
    .game-header {
        margin-bottom: 5px;
    }
    
    .game-title {
        font-size: 1em;
        margin-bottom: 1px;
    }
    
    .game-subtitle {
        font-size: 0.6em;
        margin-bottom: 2px;
    }
    
    .drag-instructions {
        font-size: 10px;
        padding: 4px;
        margin-bottom: 4px;
    }
    
    .backup-controls-btn {
        font-size: 8px;
        padding: 2px 6px;
    }
    
    .control-section {
        margin-bottom: 5px;
        gap: 4px;
    }
    
    .btn {
        padding: 4px 8px;
        font-size: 11px;
        min-height: 28px;
    }
    
    .moves-counter {
        font-size: 11px;
        padding: 4px 8px;
    }
    
    .game-board {
        width: min(95vw, 95vh);
        height: calc(min(95vw, 95vh) * 1.25);
        border-width: 2px;
    }
    
    .piece {
        font-size: 8px;
    }
}

/* Desktop and larger screens optimization */
@media (min-width: 768px) {
    body {
        padding: 20px;
        align-items: center;
    }
    
    .game-selection {
        max-width: 800px;
        padding: 40px;
    }
    
    .main-title {
        font-size: 3em;
        margin-bottom: 15px;
    }
    
    .main-subtitle {
        font-size: 1.2em;
        margin-bottom: 40px;
    }
    
    .games-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
        margin-bottom: 25px;
    }
    
    .game-card {
        padding: 40px 30px;
        border-radius: 20px;
    }
    
    .game-title {
        font-size: 1.8em;
        margin-bottom: 12px;
    }
    
    .game-desc {
        font-size: 1em;
        line-height: 1.5;
    }
    
    .game-container {
        max-width: 700px;
        padding: 40px;
        border-radius: 25px;
    }
    
    .game-info {
        margin-bottom: 30px;
    }
    
    .game-header {
        margin-bottom: 25px;
        padding: 0 10px;
    }
    
    .game-title {
        font-size: 2.5em;
        margin-bottom: 8px;
    }
    
    .game-subtitle {
        font-size: 1.1em;
    }
    
    .back-btn {
        padding: 10px 20px;
        font-size: 14px;
        border-radius: 25px;
    }
    
    .drag-instructions {
        font-size: 14px;
        padding: 12px;
        margin-bottom: 15px;
        border-radius: 8px;
    }
    
    .control-section {
        gap: 15px;
        margin-bottom: 20px;
    }
    
    .primary-controls {
        gap: 15px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 15px;
        border-radius: 30px;
    }
    
    .moves-counter {
        font-size: 14px;
        padding: 10px 18px;
        border-radius: 25px;
    }
    
    .game-board {
        width: 500px;
        height: 625px;
        border-width: 6px;
    }
    
    .gomoku-board, 
    .sudoku-board, 
    .puzzle2048-board {
        width: 500px;
        height: 500px;
    }
    
    .difficulty-selector {
        padding: 15px;
        margin-bottom: 20px;
    }
    
    .difficulty-title {
        font-size: 1.1em;
        margin-bottom: 12px;
    }
    
    .difficulty-btn {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .ai-mode-toggle {
        padding: 12px;
        margin-bottom: 18px;
    }
    
    .ai-toggle-btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    /* New games desktop styles */
    .idiom-game-area,
    .math-game-area {
        max-width: 500px;
        padding: 25px;
    }
    
    .current-idiom,
    .math-question {
        padding: 35px;
        margin-bottom: 30px;
    }
    
    .idiom-display {
        font-size: 2.8em;
        margin-bottom: 12px;
    }
    
    .idiom-meaning {
        font-size: 1.2em;
    }
    
    .question-display {
        font-size: 3.2em;
        margin-bottom: 12px;
    }
    
    .answer-options {
        gap: 18px;
        margin-bottom: 25px;
    }
    
    .option-btn {
        padding: 22px 18px;
        font-size: 1.5em;
        min-height: 90px;
        border-radius: 15px;
    }
    
    .answer-input {
        gap: 18px;
        margin-bottom: 25px;
    }
    
    #mathAnswer {
        max-width: 220px;
        padding: 16px 22px;
        font-size: 1.6em;
        border-radius: 12px;
    }
    
    .submit-btn {
        padding: 16px 28px;
        font-size: 1.3em;
        border-radius: 12px;
    }
    
    .game-feedback,
    .math-feedback {
        font-size: 1.3em;
        padding: 18px;
        min-height: 60px;
        margin-bottom: 20px;
    }
    
    .math-history {
        padding: 18px;
        max-height: 250px;
    }
    
    .history-item {
        padding: 10px 15px;
        margin-bottom: 8px;
        font-size: 1em;
    }
}

/* Large desktop screens */
@media (min-width: 1200px) {
    .game-selection {
        max-width: 1000px;
        padding: 50px;
    }
    
    .games-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }
    
    .game-container {
        max-width: 800px;
        padding: 50px;
    }
    
    .game-board {
        width: 600px;
        height: 750px;
    }
    
    .gomoku-board, 
    .sudoku-board, 
    .puzzle2048-board {
        width: 600px;
        height: 600px;
    }
    
    /* New games desktop optimization */
    .idiom-game-area,
    .math-game-area {
        max-width: 600px;
        padding: 30px;
    }
    
    .current-idiom,
    .math-question {
        padding: 40px;
    }
    
    .idiom-display {
        font-size: 3em;
    }
    
    .question-display {
        font-size: 3.5em;
    }
    
    .answer-options {
        gap: 20px;
    }
    
    .option-btn {
        padding: 25px 20px;
        font-size: 1.6em;
        min-height: 100px;
    }
    
    #mathAnswer {
        max-width: 250px;
        padding: 18px 25px;
        font-size: 1.8em;
    }
    
    .submit-btn {
        padding: 18px 30px;
        font-size: 1.4em;
    }
}

/* Tablet/iPad Responsive Design */
@media (min-width: 601px) and (max-width: 1024px) {
    body {
        padding: 15px;
        align-items: center;
    }

    .game-selection {
        padding: 25px;
        margin: 10px;
        border-radius: 20px;
        max-width: 800px;
    }

    .main-title {
        font-size: 2.2em;
        margin-bottom: 12px;
    }

    .main-subtitle {
        font-size: 1.1em;
        margin-bottom: 25px;
    }

    .games-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        margin-bottom: 20px;
    }

    .game-card {
        padding: 25px;
        border-radius: 15px;
        min-height: 120px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .game-title {
        font-size: 1.4em;
        margin-bottom: 10px;
    }

    .game-desc {
        font-size: 0.95em;
        line-height: 1.4;
    }

    .game-container {
        padding: 20px;
        margin: 10px;
        border-radius: 20px;
        max-width: 900px;
        width: 95vw;
    }

    .game-info {
        width: 100%;
        margin-bottom: 20px;
        padding: 20px;
    }

    .game-header {
        margin-bottom: 20px;
    }

    .game-title-section h1 {
        font-size: 2em;
    }

    .game-subtitle {
        font-size: 1.1em;
    }

    .back-btn {
        padding: 10px 16px;
        font-size: 1em;
    }

    .control-section {
        margin: 20px 0;
    }

    .primary-controls {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .btn {
        padding: 12px 20px;
        font-size: 1em;
        min-width: 120px;
    }

    .status-info {
        gap: 20px;
        justify-content: center;
        flex-wrap: wrap;
    }

    .moves-counter {
        font-size: 1em;
        padding: 10px 15px;
    }

    .difficulty-selector {
        padding: 15px;
        margin-bottom: 20px;
    }

    .difficulty-title {
        font-size: 1.1em;
        margin-bottom: 12px;
    }

    .difficulty-btn {
        padding: 10px 16px;
        font-size: 1em;
        min-width: 100px;
    }

    .ai-mode-toggle {
        padding: 15px;
        margin-bottom: 20px;
    }

    .ai-toggle-btn {
        padding: 10px 20px;
        font-size: 1em;
    }
}

/* Ultra-wide screens */
@media (min-width: 1600px) {
    .game-selection {
        max-width: 1200px;
    }

    .game-container {
        max-width: 900px;
    }
}