/* ==========================================================================
   Mental Math Tool - Zhween Brand Styling
   ========================================================================== */

/* ========== Mental Math – Zhween brand ========== */
    .tool-content-area .mm-container {
        display: flex;
        flex-direction: column;
        height: 100%;
        min-height: 0;
        padding: 1rem;
        gap: 0.75rem;
        background: linear-gradient(135deg, var(--bg-secondary, #f7fafc) 0%, var(--bg-accent, #edf2f7) 100%);
        align-items: center;
        justify-content: flex-start;
    }

    .mm-container {
        --primary-color: #15aebf;
        --primary-light: #4ecdc4;
        --primary-dark: #0e9bb2;
        --primary-rgb: 21, 174, 191;
        --secondary-color: #764ba2;
        --success-color: #48bb78;
        --danger-color: #e74c3c;
        --warning-color: #fdcb6e;
        --white: #ffffff;
        --gray-100: #f1f3f4;
        --gray-200: #e9ecef;
        --gray-300: #dee2e6;
        --text-primary: #2d3748;
        --text-secondary: #4a5568;
        --text-muted: #718096;
        --radius-md: 0.5rem;
        --radius-lg: 0.75rem;
        --radius-xl: 1rem;
        --radius-2xl: 1.25rem;
        --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
        --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    }

    * { box-sizing: border-box; }

    .mm-game-box {
        width: 100%;
        max-width: 850px;
        display: flex;
        flex-direction: column;
        flex: 1;
        min-height: 0;
        background: var(--white);
        border-radius: var(--radius-2xl);
        box-shadow: var(--shadow-lg);
        overflow: hidden;
    }

    .tool-page-wrapper:fullscreen .mm-container,
    .tool-page-wrapper:-webkit-full-screen .mm-container {
        padding: 1.25rem;
    }

    .mm-header {
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
        color: var(--white);
        text-align: center;
        padding: 0.875rem 1rem;
        flex-shrink: 0;
    }

    .mm-header h2 {
        font-size: clamp(1.25rem, 3vh, 1.75rem);
        font-weight: 700;
        margin: 0;
    }

    .mm-main {
        flex: 1;
        display: flex;
        flex-direction: column;
        overflow: hidden;
    }

    .mm-content {
        flex: 1;
        padding: 1rem;
        overflow-y: auto;
        display: flex;
        flex-direction: column;
    }

    /* Menu Section */
    .mm-menu {
        background: var(--gray-100);
        border-radius: var(--radius-xl);
        padding: 1.25rem;
        border: 2px solid var(--primary-color);
        flex: 1;
        display: flex;
        flex-direction: column;
        overflow-y: auto;
    }

    .mm-menu h3 {
        color: var(--primary-color);
        margin: 0 0 0.75rem 0;
        font-size: 1.2rem;
        flex-shrink: 0;
    }

    .mm-mode-toggle {
        display: flex;
        gap: 0.5rem;
        margin-bottom: 1rem;
        justify-content: center;
        flex-wrap: wrap;
    }

    .mm-mode-btn {
        padding: 0.5rem 1rem;
        background: var(--gray-200);
        color: var(--text-primary);
        border: 2px solid transparent;
        border-radius: var(--radius-md);
        cursor: pointer;
        transition: all 0.25s ease;
        font-weight: 600;
        font-size: 0.9rem;
        min-height: 44px;
    }

    .mm-mode-btn:hover {
        background: var(--gray-300);
    }

    .mm-mode-btn.active {
        background: var(--primary-color);
        color: var(--white);
        border-color: var(--primary-color);
    }

    .mm-settings-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem 1.5rem;
        margin-bottom: 1rem;
        background: var(--white);
        padding: 1.25rem;
        border-radius: var(--radius-lg);
        border: 1px solid var(--gray-200);
        box-shadow: var(--shadow-md);
    }

    .mm-setting-item {
        display: flex;
        flex-direction: column;
    }

    .mm-setting-item label {
        font-weight: 600;
        margin-bottom: 0.5rem;
        color: var(--text-primary);
        font-size: 0.9rem;
    }

    .mm-setting-item select,
    .mm-setting-item input[type="number"] {
        padding: 0.625rem 0.875rem;
        border: 2px solid var(--gray-200);
        border-radius: var(--radius-md);
        font-size: 0.9rem;
        background: var(--white);
        transition: all 0.2s ease;
        min-height: 44px;
    }

    .mm-setting-item select:focus,
    .mm-setting-item input[type="number"]:focus {
        outline: none;
        border-color: var(--primary-color);
        box-shadow: 0 0 0 3px rgba(21, 174, 191, 0.15);
    }

    .mm-operations-setting {
        grid-column: 1 / -1;
    }

    .mm-operation-checks {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
        margin-top: 0.5rem;
    }

    .mm-operation-checks label {
        display: flex;
        align-items: center;
        font-weight: 500;
        cursor: pointer;
        padding: 0.5rem;
        border-radius: var(--radius-md);
        transition: background-color 0.2s ease;
        font-size: 0.875rem;
        min-height: 44px;
    }

    .mm-operation-checks label:hover {
        background-color: var(--gray-100);
    }

    .mm-operation-checks input[type="checkbox"] {
        margin-inline-end: 0.625rem;
        width: 18px;
        height: 18px;
        accent-color: var(--primary-color);
    }

    /* Custom Questions Section */
    .mm-custom-section {
        background: rgba(21, 174, 191, 0.08);
        border-radius: var(--radius-lg);
        padding: 1rem;
        border: 2px solid var(--primary-color);
        margin-bottom: 0.75rem;
    }

    .mm-custom-section h4 {
        font-size: 1rem;
        margin: 0 0 0.5rem 0;
        color: var(--primary-color);
    }

    .mm-custom-section p {
        font-size: 0.8rem;
        color: var(--text-muted);
        margin: 0.5rem 0 0 0;
        font-style: italic;
    }

    .mm-custom-textarea {
        width: 100%;
        min-height: 60px;
        max-height: 80px;
        padding: 0.625rem;
        border: 2px solid var(--primary-color);
        border-radius: var(--radius-md);
        font-size: 1rem;
        resize: vertical;
        margin-bottom: 0.5rem;
        font-family: inherit;
    }

    .mm-custom-textarea:focus {
        outline: none;
        box-shadow: 0 0 0 3px rgba(21, 174, 191, 0.15);
    }

    .mm-question-bank {
        max-height: 120px;
        overflow-y: auto;
        background: var(--white);
        border: 1px solid var(--gray-200);
        border-radius: var(--radius-md);
        padding: 0.5rem;
        margin-top: 0.75rem;
    }

    .mm-saved-question {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.5rem;
        margin: 0.25rem 0;
        background: var(--gray-100);
        border-radius: var(--radius-md);
        font-size: 0.875rem;
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    .mm-question-text {
        flex: 1;
        min-width: 100px;
    }

    .mm-question-answer {
        color: var(--primary-color);
        font-weight: 700;
    }

    .mm-negative-warning {
        font-size: 0.8rem;
        color: var(--danger-color);
        margin-top: 0.5rem;
        font-weight: 500;
    }

    /* Game Area */
    .mm-game {
        display: flex;
        flex-direction: column;
        flex: 1;
    }

    .mm-timer {
        font-size: 1.1rem;
        color: var(--secondary-color);
        margin-bottom: 0.75rem;
        font-weight: 700;
        text-align: center;
    }

    .mm-timer.warning {
        color: var(--danger-color);
        animation: mm-pulse 1s infinite;
    }

    @keyframes mm-pulse {
        0%, 100% { transform: scale(1); }
        50% { transform: scale(1.05); }
    }

    .mm-game-area {
        background: var(--gray-100);
        border-radius: var(--radius-xl);
        padding: 1.5rem;
        text-align: center;
        margin-bottom: 1rem;
        min-height: 200px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        position: relative;
        border: 2px solid var(--gray-200);
    }

    .mm-progress {
        position: absolute;
        top: 0.75rem;
        inset-inline-end: 1rem;
        font-size: 0.85rem;
        color: var(--text-muted);
        font-weight: 600;
    }

    .mm-operation-history {
        font-size: 1rem;
        color: var(--text-secondary);
        margin-bottom: 0.75rem;
        min-height: 24px;
    }

    .mm-sequence-display {
        font-size: clamp(1.75rem, 5vh, 2.5rem);
        font-weight: 700;
        color: var(--text-primary);
        min-height: 60px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0.75rem 0;
    }

    .mm-number-appear {
        animation: mm-slideIn 0.5s ease-out;
    }

    @keyframes mm-slideIn {
        from { transform: translateY(-20px); opacity: 0; }
        to { transform: translateY(0); opacity: 1; }
    }

    .mm-sequence-status {
        font-size: 0.95rem;
        color: var(--success-color);
        margin-top: 0.5rem;
        font-weight: 600;
    }

    .mm-waiting-message {
        color: var(--text-muted);
        font-style: italic;
        margin-top: 0.5rem;
        font-size: 0.9rem;
    }

    .mm-answer-input {
        font-size: 1.25rem;
        padding: 0.625rem 1rem;
        border: 3px solid var(--primary-color);
        border-radius: var(--radius-lg);
        text-align: center;
        width: 180px;
        margin: 0.75rem auto;
        display: block;
        font-weight: 600;
        min-height: 50px;
    }

    .mm-answer-input:focus {
        outline: none;
        border-color: var(--secondary-color);
        box-shadow: 0 0 0 3px rgba(118, 75, 162, 0.2);
    }

    .mm-answer-input:disabled {
        background: var(--gray-100);
        cursor: not-allowed;
    }

    /* Buttons */
    .mm-btn {
        font-size: 0.9rem;
        padding: 0.625rem 1.25rem;
        margin: 0.25rem;
        border: none;
        border-radius: var(--radius-lg);
        cursor: pointer;
        transition: all 0.25s ease;
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 44px;
        font-family: inherit;
    }

    .mm-btn-primary {
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
        color: var(--white);
        box-shadow: 0 4px 14px rgba(21, 174, 191, 0.3);
    }

    .mm-btn-primary:hover:not(:disabled) {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(21, 174, 191, 0.4);
    }

    .mm-btn-success {
        background: var(--success-color);
        color: var(--white);
    }

    .mm-btn-success:hover:not(:disabled) {
        background: #38a065;
        transform: translateY(-1px);
    }

    .mm-btn-success:disabled {
        background: var(--gray-300);
        cursor: not-allowed;
        transform: none;
    }

    .mm-btn-danger {
        background: var(--danger-color);
        color: var(--white);
    }

    .mm-btn-danger:hover:not(:disabled) {
        background: #c0392b;
    }

    .mm-btn-sm {
        padding: 0.375rem 0.625rem;
        font-size: 0.8rem;
        min-height: 36px;
    }

    /* Score and Feedback */
    .mm-score {
        font-size: 1.1rem;
        margin: 0.5rem 0;
        color: var(--primary-color);
        font-weight: 700;
        text-align: center;
    }

    .mm-feedback {
        font-size: 0.95rem;
        margin: 0.5rem 0;
        font-weight: 600;
        min-height: 24px;
        text-align: center;
    }

    .mm-feedback.correct {
        color: var(--success-color);
    }

    .mm-feedback.incorrect {
        color: var(--danger-color);
    }

    /* Results Section */
    .mm-results {
        background: var(--gray-100);
        border-radius: var(--radius-xl);
        padding: 1.5rem;
        text-align: center;
    }

    .mm-results h3 {
        color: var(--primary-color);
        margin: 0 0 1rem 0;
        font-size: 1.35rem;
    }

    .mm-stat-item {
        display: flex;
        justify-content: space-between;
        margin: 0.5rem 0;
        font-size: 0.95rem;
        padding: 0.5rem 0;
        border-bottom: 1px solid var(--gray-200);
    }

    .mm-stat-item:last-child {
        border-bottom: none;
    }

    .mm-stat-item span:last-child {
        font-weight: 700;
        color: var(--primary-color);
    }

    .mm-speech-setting {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        margin-top: 0.75rem;
        padding: 0.5rem;
        background: var(--white);
        border-radius: var(--radius-md);
        font-size: 0.9rem;
    }

    .mm-speech-setting input[type="checkbox"] {
        width: 18px;
        height: 18px;
        accent-color: var(--primary-color);
    }

    /* Center buttons container */
    .mm-buttons-center {
        display: flex;
        justify-content: center;
        gap: 0.5rem;
        flex-wrap: wrap;
        margin-top: 0.75rem;
    }

    /* Utility classes */
    .mm-hidden { display: none !important; }
    .mm-text-center { text-align: center; }
    .mm-mt-1 { margin-top: 0.75rem; }

    /* Responsive */
    @media (max-width: 768px) {
        .mm-settings-grid {
            grid-template-columns: 1fr;
            gap: 0.75rem;
            padding: 1rem;
        }

        .mm-operations-setting {
            grid-column: 1;
        }

        .mm-operation-checks {
            grid-template-columns: 1fr;
        }

        .mm-header h2 {
            font-size: 1.25rem;
        }

        .mm-sequence-display {
            font-size: 1.75rem;
        }

        .mm-answer-input {
            width: 140px;
            font-size: 1.1rem;
        }

        .mm-game-area {
            padding: 1rem;
            min-height: 160px;
        }

        .mm-mode-toggle {
            flex-direction: column;
            align-items: stretch;
        }

        .mm-btn {
            font-size: 0.85rem;
            padding: 0.5rem 1rem;
        }
    }

    @media (max-width: 480px) {
        .mm-container {
            padding: 0.5rem;
        }

        .mm-content {
            padding: 0.75rem;
        }

        .mm-menu, .mm-game-area, .mm-results {
            padding: 1rem;
        }

        .mm-sequence-display {
            font-size: 1.5rem;
        }

        .mm-settings-grid {
            padding: 0.75rem;
        }
    }

    @media (prefers-reduced-motion: reduce) {
        .mm-number-appear { animation: none; }
        .mm-timer.warning { animation: none; }
        .mm-btn { transition: none; }
    }