/* 
 * Place Value Learning Activity - Component-Specific Styles
 * File: assets/css/place-value.css
 * 
 * Modern place value activity with interactive base-10 blocks
 * Uses QMB component system variables and patterns
 */

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@300;400;500;600;700&display=swap');

/* Import consolidated utilities with all variables */
@import url('components/utilities.css');
@import url('components/header.css');
@import url('components/modal.css');

/* Place Value Specific Variables */
:root {
    /* Block colors for different place values */
    --block-ones: #3b82f6;          /* Blue */
    --block-tens: #10b981;          /* Green */
    --block-hundreds: #f59e0b;      /* Amber */
    --block-thousands: #ef4444;     /* Red */
    --block-ten-thousands: #8b5cf6; /* Purple */
    --block-hundred-thousands: #ec4899; /* Pink */
    --block-millions: #f97316;      /* Orange */
    
    /* Block hover states */
    --block-ones-hover: #1d4ed8;
    --block-tens-hover: #059669;
    --block-hundreds-hover: #d97706;
    --block-thousands-hover: #dc2626;
    --block-ten-thousands-hover: #7c3aed;
    --block-hundred-thousands-hover: #db2777;
    --block-millions-hover: #ea580c;
    
    /* Activity specific colors */
    --workspace-bg: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --column-bg: rgba(255, 255, 255, 0.9);
    --column-border: #e2e8f0;
    --drop-zone-active: #dbeafe;
    --drop-zone-valid: #d1fae5;
    --drop-zone-invalid: #fee2e2;
}

 /* =============================================================================
    BASE STYLES
    ============================================================================= */
 
    * { 
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    
    body {
        font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        background: linear-gradient(135deg, #112167 0%, #2c3e50 100%);
        min-height: 100vh;
        padding: var(--spacing-xl);
        line-height: 1.6;
        color: var(--text-primary);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    
    .container {
        max-width: 1200px;
        margin: 0 auto;
        background: var(--bg-primary);
        border-radius: var(--radius-2xl);
        box-shadow: var(--shadow-xl);
        overflow: hidden;
        position: relative;
    }
    
    .container::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 6px;
        background: linear-gradient(90deg, var(--primary-blue), var(--accent-pink), var(--accent-green), var(--accent-orange));
        border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
    }   

/* Body styling for place value page */
body.place-value-activity {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    min-height: 100vh;
    font-family: var(--font-primary);
}

/* Main container */
.place-value-app {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    max-width: var(--container-max-width);
    min-height: 80vh;
    
    /* Performance optimizations */
    will-change: transform;
    transform: translateZ(0);
}

/* ===== SETUP SCREEN STYLES ===== */

.setup-container {
    padding: var(--spacing-xl);
    text-align: center;
}

.setup-header {
    margin-bottom: var(--spacing-2xl);
}

.setup-header h2 {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.setup-subtitle {
    font-size: var(--text-lg);
    color: var(--medium-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* Level Grid */
.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.level-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 2px solid var(--column-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    
    /* GPU acceleration */
    will-change: transform;
    transform: translateZ(0);
}

.level-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-blue);
}

.level-card.selected {
    border-color: var(--golden-dark);
    background: linear-gradient(135deg, #fef3c7 0%, #fbbf24 100%);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.level-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-green), var(--accent-orange));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.level-card.selected::before {
    opacity: 1;
}

.level-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.level-icon {
    font-size: var(--text-4xl);
    line-height: 1;
}

.level-info {
    flex: 1;
    text-align: left;
}

.level-name {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--spacing-xs) 0;
}

.level-description {
    font-size: var(--text-sm);
    padding: var(--spacing-md);
    color: var(--medium-gray);
    margin: 0;
}

.level-badge1 {
    display: flex;
    background: var(--primary-blue);
    color: white;
    padding: var(--spacing-xs) var(--spacing-xs);
    text-wrap: wrap;
    max-width: 45px;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
}

.level-card.selected .level-badge1 {
    background: var(--golden-dark);
}

.level-details {
    margin-bottom: var(--spacing-lg);
}

.level-range {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.detail-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: var(--text-sm);
}

.detail-value {
    color: var(--medium-gray);
    font-size: var(--text-sm);
}

.level-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    justify-content: center;
    padding: var(--spacing-xs);
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-sm);
}

.feature-icon {
    font-size: var(--text-lg);
}

.feature-text {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--primary-blue);
}

.level-actions {
    margin-top: var(--spacing-md);
}

.btn-select-level {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--text-base);
    cursor: pointer;
    transition: all var(--transition-normal);
    width: 100%;
    
    /* Touch optimization */
    min-height: 44px;
    touch-action: manipulation;
}

.btn-select-level:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.level-card.selected .btn-select-level {
    background: var(--success);
}

/* Questions Section */
.questions-section {
    margin: var(--spacing-2xl) 0;
    padding: var(--spacing-xl);
    background: rgba(59, 130, 246, 0.05);
    border-radius: var(--radius-xl);
    border: 2px dashed var(--primary-blue);
}

.questions-section h3 {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.questions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

.question-option {
    background: white;
    border: 2px solid var(--column-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    
    /* Touch optimization */
    min-height: 80px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    touch-action: manipulation;
}

.question-option:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-blue);
}

.question-option.selected {
    background: var(--golden);
    border-color: var(--golden-dark);
    box-shadow: var(--shadow-lg);
}

.question-number {
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.question-label {
    font-size: var(--text-sm);
    color: var(--medium-gray);
    margin-top: var(--spacing-xs);
}

/* Start Button */
.start-button {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
    border: none;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--radius-xl);
    font-size: var(--text-xl);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
    
    /* Touch optimization */
    min-height: 60px;
    touch-action: manipulation;
}

.start-button:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.start-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.start-icon {
    font-size: var(--text-2xl);
}

/* ===== GAME SCREEN STYLES ===== */

.game-area-container {
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: 300px 1fr;
    grid-template-rows: auto 1fr;
    grid-template-areas:
        "header header"
        "sidebar workspace";
    gap: var(--spacing-lg);
    min-height: 500px;
}

.game-sidebar {
    grid-area: sidebar;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.game-header {
    grid-area: header;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.question-counter {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.target-number-section {
    text-align: center;
    flex: 1;
    margin: 0 var(--spacing-lg);
}

.instruction-text {
    font-size: var(--text-lg);
    color: var(--medium-gray);
    margin: 0 0 var(--spacing-sm) 0;
}

.target-number {
    font-size: var(--text-4xl);
    font-weight: 900;
    color: var(--primary-blue);
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    border: 3px solid var(--primary-blue);
    display: inline-block;
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-md);
    
    /* Add number animation */
    animation: numberPulse 2s ease-in-out infinite;
}

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

.speak-btn {
    background: var(--accent-green);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.speak-btn:hover {
    background: #059669;
    transform: translateY(-1px);
}

/* Blocks Workspace */
.blocks-workspace {
    grid-area: workspace;
    background: var(--workspace-bg);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.06);
    overflow-y: auto;
}
.place-value-columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
    height: 100%;
}

.place-column {
    background: var(--column-bg);
    border: 2px solid var(--column-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    min-height: 200px;
    transition: all var(--transition-normal);
    position: relative;
}

.place-column.drop-zone-active {
    border-color: var(--primary-blue);
    background: var(--drop-zone-active);
}

.place-column.drop-zone-valid {
    border-color: var(--success);
    background: var(--drop-zone-valid);
}

.place-column.drop-zone-invalid {
    border-color: var(--danger);
    background: var(--drop-zone-invalid);
    animation: shake 0.3s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.place-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-md);
    position: sticky;
    top: 0;
    z-index: 10;
}

.place-name {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--primary-blue);
    margin: 0;
}

.place-value {
    font-size: var(--text-sm);
    color: var(--medium-gray);
    margin: 0;
}

.blocks-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    justify-content: center;
    align-items: flex-end;
    min-height: 120px;
    padding: var(--spacing-sm);
}

.block {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-sm);
    cursor: grab;
    transition: all var(--transition-fast);
    position: relative;
    user-select: none;
    
    /* Touch optimization */
    touch-action: none;
    -webkit-touch-callout: none;
}

.block:active {
    cursor: grabbing;
}

.block:hover {
    transform: scale(1.1);
    z-index: 10;
}

/* Block types */
.block-ones {
    background: var(--block-ones);
    box-shadow: inset 0 1px 2px rgba(255, 255, 255, 0.3);
}

.block-tens {
    background: var(--golden);
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.block-hundreds {
    background: var(--block-hundreds);
    width: 54px;
    height: 54px;
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    grid-template-rows: repeat(10, 1fr);
    padding: 2px;
}

.block-thousands {
    background: lightgreen;
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: var(--text-xs);
}
.block-ten_thousands {
    background: #8b5cf6;
    width: 16px;
    height: 63px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: var(--text-xs);
}

.block-hundred_thousands {
    background: #ec4899;
    width: 63px;
    height: 63px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: var(--text-xs);
}

.block-millions {
    background: #f97316;
    width: 63px;
    height: 63px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: var(--text-xs);
}

.block-sample-image {
    width: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.block-sample-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* Block Controls */
.block-controls {
    flex: 1;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    backdrop-filter: blur(10px);
}

.block-palette {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.block-control {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: white;
    border: 2px solid var(--column-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.block-control:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-blue);
}
.block-control-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.block-sample {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: var(--text-xs);
    flex-shrink: 0;
}

.control-info {
    flex: 1;
    min-width: 0;
}

.control-name {
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    font-size: var(--text-sm);
}

.control-value {
    font-size: var(--text-xs);
    color: var(--medium-gray);
    margin: 0;
}

.control-buttons {
    display: flex;
    gap: var(--spacing-xs);
    justify-content: center;
}

.btn-add, .btn-remove {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
    font-weight: bold;
    
    /* Touch optimization */
    touch-action: manipulation;
}

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

.btn-add:hover {
    background: #059669;
    transform: scale(1.1);
}

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

.btn-remove:hover {
    background: #dc2626;
    transform: scale(1.1);
}

.btn-remove:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Game Actions */
.game-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.check-button, .next-button {
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    min-height: 48px;
    touch-action: manipulation;
}

.check-button {
    background: var(--primary-blue);
    color: white;
}

.check-button:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.next-button {
    background: var(--success);
    color: white;
}

.next-button:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Feedback Area */
.feedback-area {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    min-width: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.feedback-correct {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    border: 2px solid var(--success);
    color: var(--success);
    animation: correctPulse 0.6s ease-out;
}

.feedback-incorrect {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    border: 2px solid var(--danger);
    color: var(--danger);
    animation: incorrectShake 0.5s ease-out;
}

@keyframes correctPulse {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes incorrectShake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-10px); }
    40%, 80% { transform: translateX(10px); }
}

.feedback-message {
    font-size: var(--text-xl);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Completion Modal Styles */
.completion-summary {
    max-width: 800px;
    margin: 0 auto;
}

.badge-description {
    text-align: center;
    padding: 0 20px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
    margin: 30px 0;
}

.stat-card {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-lg);
    padding: 15px;
    text-align: center;
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card.badge-perfect {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-color: #fbbf24;
}

.stat-card.badge-excellent {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    border-color: #10b981;
}

.stat-card.badge-great {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-color: #3b82f6;
}

.stat-card.badge-good {
    background: linear-gradient(135deg, #ede9fe 0%, #ddd6fe 100%);
    border-color: #8b5cf6;
}

.stat-card.badge-progress {
    background: linear-gradient(135deg, #fed7aa 0%, #fdba74 100%);
    border-color: #f59e0b;
}

.stat-card.badge-practice {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    border-color: #ef4444;
}

.stat-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 12px;
    color: #6b7280;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 18px;
    font-weight: 700;
    color: #1f2937;
}

.answer-review {
    padding-top: 10px;
    border-top: 2px solid #e5e7eb;
}

.review-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 300px;
    overflow-y: auto;
    padding: 10px;
}

.review-item {
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: var(--radius-md);
    padding: 12px;
    transition: all var(--transition-fast);
}

.review-item:hover {
    box-shadow: var(--shadow-sm);
}

.review-item.review-correct {
    border-color: #10b981;
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
}

.review-item.review-incorrect {
    border-color: #ef4444;
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid #e5e7eb;
}

.review-number {
    font-weight: 600;
    color: #374151;
    font-size: 14px;
}

.review-status {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 13px;
    font-weight: 600;
}

.review-correct .review-status {
    color: #059669;
}

.review-incorrect .review-status {
    color: #dc2626;
}

.status-icon {
    font-size: 16px;
    font-weight: bold;
}

.review-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    justify-items: center;
    font-size: 13px;
    color: #4b5563;
}

.review-target,
.review-your-answer,
.review-breakdown {
    margin: 4px 0;
    padding: 4px 0;
}

.review-target strong,
.review-your-answer strong,
.review-breakdown strong {
    color: #1f2937;
    font-weight: 600;
}

.review-your-answer {
    color: #dc2626;
}

.setting-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: var(--spacing-sm);
}
.question-info {
    display:block;
}
.btnSec {
    width: 170px; /* Increased width slightly for better spacing */
    padding: var(--spacing-md);
    font-size: var(--text-lg);
    font-family: var(--font-display);
    font-weight: 600;
    text-align: center;
    color: var(--text-color, #333); /* Default text color */
    border-radius: var(--radius-md);
    border: 3px solid transparent; /* Set a transparent border to prevent size shifts on hover */
    background-color: transparent;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); /* Subtle shadow for depth */
    transition: all 0.3s ease-in-out; /* Smooth transition for all changes! */
}

/* 2. Color Variations */
.btn-retry {
    background-color: var(--golden);
    border-color: var(--golden-dark);
    color: var(--medium-gray);
}

.btn-newlevel {
    background-color: transparent;
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

/* 3. Appealing Hover Effects */
.btnSec:hover {
    transform: translateY(-3px); /* Lifts the button slightly */
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2); /* Enhances the shadow on hover */
}

.btn-retry:hover {
    background-color: var(--golden-dark);
    color: #fff; /* White text for contrast on the dark background */
}

.btn-newlevel:hover {
    background-color: var(--primary-blue);
    color: #fff; /* White text for contrast */
}

/* Button shake animation */
@keyframes btnShake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.btn-shake {
    animation: btnShake 0.5s ease-in-out;
    border-color: var(--danger) !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2) !important;
}

.btn-add.btn-shake {
    background: #fca5a5 !important;
}

.btn-remove.btn-shake {
    background: #fca5a5 !important;
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
    .place-value-app {
        padding: var(--spacing-md);
        margin: var(--spacing-md);
    }
    
    .level-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .questions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .place-value-columns {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .block-palette {
        grid-template-columns: 1fr;
    }
    
    .game-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .target-number {
        font-size: var(--text-3xl);
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .game-actions {
        flex-direction: column;
        align-items: center;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-icon {
        font-size: 24px;
    }
    
    .stat-value {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .place-value-columns {
        grid-template-columns: 1fr;
    }
    
    .target-number {
        font-size: var(--text-2xl);
    }
    
    .block-control {
        flex-direction: column;
        text-align: center;
    }
    
    .control-buttons {
        justify-content: center;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ACCESSIBILITY ENHANCEMENTS */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .target-number {
        animation: none;
    }
}

@media (prefers-contrast: high) {
    .level-card,
    .place-column,
    .block-control {
        border-width: 3px;
    }
    
    .block {
        border: 2px solid #000;
    }
}

/* Focus states for keyboard navigation */
.level-card:focus,
.question-option:focus,
.btn-add:focus,
.btn-remove:focus,
.check-button:focus,
.next-button:focus {
    outline: 3px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .game-actions,
    .block-controls {
        display: none;
    }
    
    .blocks-workspace {
        break-inside: avoid;
    }
}