@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .header {
        margin-bottom: 10px;
        padding-bottom: inherit;
        gap: 10px;
        border-bottom: none;
    }

    .logo-img img {
        height: 35px;
    }

    .theme-btn {
        width: 40px;
        height: 40px;
    }

    .game-info-container {
        gap: 0px;
    }


    .difficulty-buttons {
        gap: 8px;
        margin-bottom: 10px;
    }

    .difficulty-btn {
        padding: 10px 15px;
        font-size: 0.85rem;
        min-width: 80px;
    }

    .tool-buttons {
        grid-template-columns: repeat(4, 1fr);
        gap: 10px;
    }

    .tool-btn {
        min-height: 70px;
        padding: 12px 0;
        border-radius: 10px;
    }

    
    .tool-btn:hover, .tool-btn.active {
        background-color: transparent;
        border-color: var(--light-border);
        color: inherit;
        transform: none;
    }

    .tool-btn:active {
        background-color: var(--primary-color);
        border-color: var(--primary-color);
        color: white;
        transform: translateY(-2px);
    }

    .tool-btn.note-mode:active {
        background-color: var(--note-color);
        border-color: var(--note-color);
    }

    .dark-theme .tool-btn.note-mode:active {
        background-color: var(--note-color);
        border-color: var(--note-color);
        color: white;
    }

    .tool-icon {
        font-size: 1.5rem;
        margin-bottom: 3px;
    }

    
    .number-pad {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .number-btn {
        font-size: 1.3rem;
        border-radius: 8px;
    }

    
    .number-btn:hover, .number-btn:focus {
        background-color: var(--light-color);
        border-color: var(--light-border);
        color: var(--primary-color);
        transform: none;
        outline: none;
    }

    
    .number-pad .number-btn:active, .number-btn:active {
        background-color: var(--primary-color);
        border-color: var(--primary-color);
        color: white;
        transform: scale(1.05);
    }

    .new-game-btn {
        padding: 16px;
        font-size: 1.1rem;
        border-radius: 10px;
    }

    
    .sudoku-grid .sudoku-cell {
        width: 45px;
        height: 45px;
        font-size: 1.5rem;
    }

    
    .notes-container {
        padding: 0;
        gap: 0;
    }

    .note {
        font-size: 0.6rem !important;
        padding: 0 !important;
    }

    .modal {
        padding: 20px;
    }

    .modal-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        padding: 12px 0;
    }

    .modal-stat-value {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 8px;
    }

    .logo-img img {
        height: 40px;
    }

    .theme-btn {
        width: 36px;
        height: 36px;
    }


    .difficulty-buttons {
        gap: 6px;
    }

    .difficulty-btn {
        padding: 8px 12px;
        font-size: 0.8rem;
        min-width: 70px;
    }

    .tool-buttons {
        gap: 8px;
        height: 40px;
    }

    .tool-btn {
        min-height: 40px;
        padding: 2px 0;
    }

    
    .tool-btn:hover, .tool-btn.active {
        background-color: transparent;
        border-color: var(--light-border);
        color: inherit;
        transform: none;
    }

    .tool-btn:active {
        background-color: var(--primary-color);
        border-color: var(--primary-color);
        color: white;
        transform: translateY(-2px);
    }

    .tool-btn.note-mode:active {
        background-color: var(--note-color);
        border-color: var(--note-color);
    }

    .dark-theme .tool-btn.note-mode:active {
        background-color: var(--note-color);
        border-color: var(--note-color);
        color: white;
    }

    .tool-icon {
        font-size: 1.3rem;
    }

    .number-pad {
        grid-template-columns: repeat(9, 1fr) !important;
        gap: 6px;
    }

    .number-btn {
        font-size: 1.8rem;
        width: 35px;
        height: 60px;
    }

    
    .number-btn:hover, .number-btn:focus {
        background-color: var(--light-color);
        border-color: var(--light-border);
        color: var(--primary-color);
        transform: none;
        outline: none;
    }

    
    .number-pad .number-btn:active, .number-btn:active {
        background-color: var(--primary-color);
        border-color: var(--primary-color);
        color: white;
        transform: scale(1.05);
    }

    .new-game-btn {
        padding: 14px;
        font-size: 1rem;
    }

    
    .sudoku-grid .sudoku-cell {
        width: 38px;
        height: 38px;
        font-size: 1.3rem;
    }

    
    .note {
        font-size: 0.55rem !important;
    }

    .game-board-container {
        padding: 5px;
    }
}

@media (max-width: 360px) {
    .sudoku-grid .sudoku-cell {
        width: 35px;
        height: 35px;
        font-size: 1.2rem;
    }

    .note {
        font-size: 0.5rem !important;
    }

    .number-btn {
        font-size: 1.1rem;
    }

    .tool-btn {
        min-height: 40px;
    }

    .tool-btn:hover, .tool-btn.active {
        background-color: transparent;
        border-color: var(--light-border);
        color: inherit;
        transform: none;
    }

    .tool-btn:active {
        background-color: var(--primary-color);
        border-color: var(--primary-color);
        color: white;
        transform: translateY(-2px);
    }

    .tool-btn.note-mode:active {
        background-color: var(--note-color);
        border-color: var(--note-color);
    }

    .dark-theme .tool-btn.note-mode:active {
        background-color: var(--note-color);
        border-color: var(--note-color);
        color: white;
    }

    .difficulty-btn {
        padding: 6px 10px;
        font-size: 0.75rem;
        min-width: 60px;
    }


    
    .number-btn:hover, .number-btn:focus {
        background-color: var(--light-color);
        border-color: var(--light-border);
        color: var(--primary-color);
        transform: none;
        outline: none;
    }

    
    .number-pad .number-btn:active, .number-btn:active {
        background-color: var(--primary-color);
        border-color: var(--primary-color);
        color: white;
        transform: scale(1.05);
    }
}


@media (min-width: 769px) and (max-width: 1024px) {
    .game-main-container {
        flex-direction: row;
        align-items: flex-start;
        flex-wrap: wrap;
    }

    .game-board-container {
        flex: 2;
        min-width: 500px;
        max-width: 700px;
        margin-right: 20px;
    }

    .control-panel {
        width: 300px;
        margin: 0;
        flex: 1;
        min-width: 300px;
    }

    .number-pad {
        grid-template-columns: repeat(3, 1fr);
    }

    
    .desktop-number-panel {
        display: none;
    }
}


@media (min-width: 769px) and (max-width: 850px) {
    .number-pad {
        grid-template-columns: repeat(9, 1fr) !important;
        gap: 6px;
    }

    .number-btn {
        font-size: 1.8rem;
        width: 35px;
        height: 60px;
    }
}


@media (min-width: 1025px) {
    body {
        padding: 30px;
    }
    
    .header {
	    display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: space-evenly;
        margin-bottom: 30px;
        padding-bottom: 20px;
    }
    
    .header-top {
        width: auto;
        justify-content: flex-start;
        gap: 30px;
    }
    
    .logo-section {
        flex: 0 0 auto;
    }
    
    .logo-img img {
        height: 50px;
    }
    
    .theme-toggle-absolute {
        position: relative;
        right: auto;
        top: auto;
        margin-left: auto;
    }
    
    .game-info-container {
        flex-direction: row;
        width: auto;
        gap: 40px;
        align-items: center;
    }
    
    
    .difficulty-buttons {
        justify-content: flex-start;
        margin-bottom: 0;
        gap: 15px;
    }
    
    .difficulty-btn {
        min-width: 120px;
        padding: 12px 20px;
    }
    
    
    .game-main-container {
        flex-direction: row;
        align-items: flex-start;
        gap: 40px;
        max-width: 1200px;
        margin: 0 auto;
        position: relative;
    }
    
    .game-board-container {
        flex: 1;
        max-width: 700px;
        min-width: 500px;
        margin-right: 0;
    }
    
    .control-panel {
        margin: 0;
        max-width: min-content;
        display: flex;
        flex-direction: column;
        gap: 10px;
        align-items: center;
        align-content: center;
        flex-wrap: nowrap;
        margin: 0;
        padding: 0;
    }
    
    
    .desktop-number-panel {
        display: block;
        width: auto;
        margin-top: 0;
    }
    
    
    .tool-buttons {
        display: none;
    }
    
    .number-pad {
        display: none;
    }
    
    .new-game-container {
        margin-top: 10px;
    }
    
    .new-game-btn {
        padding: 18px;
        font-size: 1.2rem;
    }
    
    .tool-icon {
        font-size: 2rem;
    }
}


@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
    }
    
    .game-main-container {
        gap: 20px;
    }
    
    .game-board-container {
        max-width: 750px;
    }
    
    .control-panel {
        width: min-content;
    }
    
    .desktop-number-pad {
        gap: 10px;
    }
    
    .desktop-number-btn {
        font-size: 2.5rem;
    }
}