/**
 * Modern Lesson Shortcodes Styles
 * 
 * This file contains all the CSS styles for the lesson shortcodes
 * with modern design, animations, and responsive layout.
 */

/* ========================================
   CSS VARIABLES AND BASE STYLES
   ======================================== */

   :root {
    --shortcode-primary: #6366f1;
    --shortcode-primary-dark: #4f46e5;
    --shortcode-secondary: #10b981;
    --shortcode-accent: #f59e0b;
    --shortcode-success: #059669;
    --shortcode-warning: #d97706;
    --shortcode-error: #dc2626;
    --shortcode-info: #0284c7;
    
    --shortcode-text-primary: #1f2937;
    --shortcode-text-secondary: #6b7280;
    --shortcode-text-muted: #9ca3af;
    
    --shortcode-bg-white: #ffffff;
    --shortcode-bg-light: #f9fafb;
    --shortcode-bg-gray: #f3f4f6;
    
    --shortcode-border: #e5e7eb;
    --shortcode-border-light: #f3f4f6;
    
    --shortcode-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shortcode-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shortcode-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shortcode-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --shortcode-radius: 12px;
    --shortcode-radius-sm: 8px;
    --shortcode-radius-lg: 16px;
    
    --shortcode-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shortcode-transition-fast: all 0.15s ease;
}

/* ========================================
   LESSON STRUCTURE COMPONENTS
   ======================================== */

/* Lesson Intro */
.lesson-intro {
    background: linear-gradient(135deg, var(--shortcode-bg-white) 0%, var(--shortcode-bg-light) 100%);
    border: 2px solid var(--shortcode-border);
    border-radius: var(--shortcode-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shortcode-shadow-md);
    transition: var(--shortcode-transition);
    position: relative;
    overflow: hidden;
}

.lesson-intro::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--shortcode-primary), var(--shortcode-secondary));
}

.lesson-intro:hover {
    transform: translateY(-2px);
    box-shadow: var(--shortcode-shadow-lg);
}

.intro-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.intro-icon {
    width: 3rem;
    height: 3rem;
    background: linear-gradient(135deg, var(--shortcode-primary), var(--shortcode-primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.intro-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--shortcode-text-primary);
    margin: 0;
}

.intro-content {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--shortcode-text-secondary);
}

/* Color variations for intro */
.intro-primary::before { background: linear-gradient(90deg, var(--shortcode-primary), var(--shortcode-primary-dark)); }
.intro-secondary::before { background: linear-gradient(90deg, var(--shortcode-secondary), #047857); }
.intro-accent::before { background: linear-gradient(90deg, var(--shortcode-accent), #d97706); }

/* Lesson Objectives */
.lesson-objectives {
    background: var(--shortcode-bg-white);
    border: 2px solid var(--shortcode-secondary);
    border-radius: var(--shortcode-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shortcode-shadow-md);
    position: relative;
}

.lesson-objectives::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--shortcode-secondary);
}

.objectives-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.objectives-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--shortcode-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.objectives-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--shortcode-text-primary);
    margin: 0;
}

.objectives-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.objectives-content li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--shortcode-border-light);
}

.objectives-content li:last-child {
    border-bottom: none;
}

.objectives-content li::before {
    content: '✓';
    color: var(--shortcode-secondary);
    font-weight: bold;
    font-size: 1.1rem;
    margin-top: 0.1rem;
}

/* Lesson Section */
.lesson-section {
    background: var(--shortcode-bg-white);
    border: 1px solid var(--shortcode-border);
    border-radius: var(--shortcode-radius);
    margin: 2rem 0;
    box-shadow: var(--shortcode-shadow-sm);
    overflow: hidden;
    transition: var(--shortcode-transition);
}

.lesson-section:hover {
    box-shadow: var(--shortcode-shadow-md);
}

.section-header {
    background: var(--shortcode-bg-light);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid var(--shortcode-border);
}

.section-number {
    width: 2rem;
    height: 2rem;
    background: var(--shortcode-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.section-icon {
    color: var(--shortcode-primary);
    font-size: 1.25rem;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--shortcode-text-primary);
    margin: 0;
}

.section-content {
    padding: 2rem;
}

/* ========================================
   CONTENT DISPLAY COMPONENTS
   ======================================== */

/* Info Box */
.info-box {
    border-radius: var(--shortcode-radius);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-left: 4px solid;
    box-shadow: var(--shortcode-shadow-sm);
    transition: var(--shortcode-transition);
}

.info-box:hover {
    transform: translateX(-2px);
    box-shadow: var(--shortcode-shadow-md);
}

.info-box-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.info-box-icon {
    font-size: 1.25rem;
}

.info-box-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.info-box-content {
    line-height: 1.6;
}

/* Info box variations */
.info-box-info {
    background: #eff6ff;
    border-color: var(--shortcode-info);
    color: #1e40af;
}

.info-box-info .info-box-icon {
    color: var(--shortcode-info);
}

.info-box-tip {
    background: #f0fdf4;
    border-color: var(--shortcode-secondary);
    color: #166534;
}

.info-box-tip .info-box-icon {
    color: var(--shortcode-secondary);
}

.info-box-warning {
    background: #fffbeb;
    border-color: var(--shortcode-warning);
    color: #92400e;
}

.info-box-warning .info-box-icon {
    color: var(--shortcode-warning);
}

.info-box-error {
    background: #fef2f2;
    border-color: var(--shortcode-error);
    color: #991b1b;
}

.info-box-error .info-box-icon {
    color: var(--shortcode-error);
}

.info-box-success {
    background: #f0fdf4;
    border-color: var(--shortcode-success);
    color: #166534;
}

.info-box-success .info-box-icon {
    color: var(--shortcode-success);
}

/* Highlight Text */
.highlight-text {
    padding: 0.25rem 0.5rem;
    border-radius: var(--shortcode-radius-sm);
    font-weight: 500;
    transition: var(--shortcode-transition-fast);
}

.highlight-style-background.highlight-yellow {
    background: #fef3c7;
    color: #92400e;
}

.highlight-style-background.highlight-blue {
    background: #dbeafe;
    color: #1e40af;
}

.highlight-style-background.highlight-green {
    background: #d1fae5;
    color: #166534;
}

.highlight-style-background.highlight-red {
    background: #fee2e2;
    color: #991b1b;
}

.highlight-style-background.highlight-purple {
    background: #ede9fe;
    color: #7c3aed;
}

.highlight-style-border {
    border: 2px solid;
    background: transparent;
}

.highlight-style-border.highlight-yellow {
    border-color: #f59e0b;
    color: #92400e;
}

.highlight-style-underline {
    background: transparent;
    border-bottom: 3px solid;
    padding-bottom: 0.125rem;
}

/* Definition Box */
.definition-box {
    background: var(--shortcode-bg-white);
    border: 2px solid var(--shortcode-accent);
    border-radius: var(--shortcode-radius);
    padding: 1.5rem;
    margin: 1.5rem 0;
    box-shadow: var(--shortcode-shadow-sm);
    position: relative;
}

.definition-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--shortcode-accent);
}

.definition-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.definition-icon {
    color: var(--shortcode-accent);
    font-size: 1.25rem;
}

.definition-term {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--shortcode-text-primary);
    margin: 0;
}

.definition-content {
    color: var(--shortcode-text-secondary);
    line-height: 1.6;
}

/* ========================================
   CODE DISPLAY COMPONENTS
   ======================================== */

/* Code Block */
.code-block-container {
    background: var(--shortcode-bg-white);
    border: 1px solid var(--shortcode-border);
    border-radius: var(--shortcode-radius);
    margin: 1.5rem 0;
    box-shadow: var(--shortcode-shadow-sm);
    overflow: hidden;
}

.code-block-header {
    background: var(--shortcode-bg-gray);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--shortcode-border);
}

.code-block-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--shortcode-text-primary);
}

.code-copy-btn {
    background: var(--shortcode-primary);
    color: white;
    border: none;
    border-radius: var(--shortcode-radius-sm);
    padding: 0.5rem 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    transition: var(--shortcode-transition-fast);
}

.code-copy-btn:hover {
    background: var(--shortcode-primary-dark);
    transform: translateY(-1px);
}

.code-copy-btn.copied {
    background: var(--shortcode-success);
}

.code-block-content {
    position: relative;
}

.code-block-content pre {
    margin: 0;
    padding: 1.5rem;
    background: #1e1e1e;
    color: #d4d4d4;
    overflow-x: auto;
    font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Interactive Code */
.interactive-code-container {
    background: var(--shortcode-bg-white);
    border: 1px solid var(--shortcode-border);
    border-radius: var(--shortcode-radius);
    margin: 2rem 0;
    box-shadow: var(--shortcode-shadow-md);
    overflow: hidden;
}

.interactive-code-header {
    background: linear-gradient(135deg, var(--shortcode-primary), var(--shortcode-primary-dark));
    color: white;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.interactive-code-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

.interactive-code-language {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: var(--shortcode-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.interactive-code-editor {
    position: relative;
}

.code-editor {
    width: 100%;
    border: none;
    padding: 1.5rem;
    font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    background: #1e1e1e;
    color: #d4d4d4;
    resize: vertical;
    outline: none;
}

.interactive-code-controls {
    background: var(--shortcode-bg-light);
    padding: 1rem 1.5rem;
    display: flex;
    gap: 1rem;
    border-top: 1px solid var(--shortcode-border);
}

.run-code-btn,
.reset-code-btn {
    background: var(--shortcode-secondary);
    color: white;
    border: none;
    border-radius: var(--shortcode-radius-sm);
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    transition: var(--shortcode-transition-fast);
}

.run-code-btn:hover {
    background: #047857;
    transform: translateY(-1px);
}

.reset-code-btn {
    background: var(--shortcode-text-secondary);
}

.reset-code-btn:hover {
    background: var(--shortcode-text-primary);
    transform: translateY(-1px);
}

.run-code-btn:disabled {
    background: var(--shortcode-text-muted);
    cursor: not-allowed;
    transform: none;
}

.interactive-code-result {
    border-top: 1px solid var(--shortcode-border);
    background: var(--shortcode-bg-light);
}

.result-header {
    padding: 1rem 1.5rem;
    background: var(--shortcode-bg-gray);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--shortcode-text-primary);
    border-bottom: 1px solid var(--shortcode-border);
}

.result-content {
    padding: 1.5rem;
    font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    background: #1e1e1e;
    color: #d4d4d4;
    white-space: pre-wrap;
    overflow-x: auto;
}

/* ========================================
   EXERCISE AND QUIZ COMPONENTS
   ======================================== */

/* Exercise */
.exercise-container {
    background: var(--shortcode-bg-white);
    border: 2px solid var(--shortcode-border);
    border-radius: var(--shortcode-radius);
    margin: 2rem 0;
    box-shadow: var(--shortcode-shadow-md);
    overflow: hidden;
    transition: var(--shortcode-transition);
}

.exercise-container:hover {
    transform: translateY(-2px);
    box-shadow: var(--shortcode-shadow-lg);
}

.exercise-header {
    background: var(--shortcode-bg-light);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    border-bottom: 1px solid var(--shortcode-border);
}

.exercise-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--shortcode-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.exercise-title-section {
    flex: 1;
}

.exercise-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--shortcode-text-primary);
    margin: 0 0 0.5rem 0;
}

.exercise-meta {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.difficulty-badge,
.time-badge,
.points-badge {
    padding: 0.25rem 0.75rem;
    border-radius: var(--shortcode-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.difficulty-badge {
    background: var(--shortcode-bg-gray);
    color: var(--shortcode-text-secondary);
}

.exercise-easy .difficulty-badge {
    background: #d1fae5;
    color: #166534;
}

.exercise-medium .difficulty-badge {
    background: #fef3c7;
    color: #92400e;
}

.exercise-hard .difficulty-badge {
    background: #fee2e2;
    color: #991b1b;
}

.time-badge {
    background: #ede9fe;
    color: #7c3aed;
}

.points-badge {
    background: #fef3c7;
    color: #92400e;
}

.exercise-content {
    padding: 2rem;
}

/* Quiz Question */
.quiz-question {
    background: var(--shortcode-bg-white);
    border: 2px solid var(--shortcode-info);
    border-radius: var(--shortcode-radius);
    margin: 2rem 0;
    box-shadow: var(--shortcode-shadow-md);
    overflow: hidden;
}

.quiz-question-header {
    background: linear-gradient(135deg, var(--shortcode-info), #0369a1);
    color: white;
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.quiz-question-icon {
    font-size: 1.5rem;
}

.quiz-question-text {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
    direction: rtl;
    text-align: right;
    unicode-bidi: embed;
}

.quiz-options {
    padding: 1.5rem 2rem;
    direction: rtl;
}

/* Fix for mixed Arabic/English content in quiz */
.quiz-question *,
.quiz-options *,
.quiz-option-label * {
    direction: rtl;
    text-align: right;
    unicode-bidi: embed;
}

/* Ensure numbers and English text display correctly within RTL context */
.quiz-question-text,
.quiz-option-label {
    unicode-bidi: plaintext;
    text-align: right;
}

/* Special handling for mixed content */
.quiz-mixed-content {
    direction: rtl;
    unicode-bidi: plaintext;
    text-align: right;
}

.quiz-option {
    margin-bottom: 1rem;
}

.quiz-option:last-child {
    margin-bottom: 0;
}

.quiz-option-input {
    display: none;
}

.quiz-option-label {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border: 2px solid var(--shortcode-border);
    border-radius: var(--shortcode-radius-sm);
    cursor: pointer;
    transition: var(--shortcode-transition-fast);
    background: var(--shortcode-bg-white);
    direction: rtl;
    text-align: right;
    unicode-bidi: embed;
}

.quiz-option-text {
    flex: 1;
    direction: rtl;
    text-align: right;
    unicode-bidi: embed;
}

.quiz-option-label:hover {
    border-color: var(--shortcode-info);
    background: #eff6ff;
}

.quiz-option-input:checked + .quiz-option-label {
    border-color: var(--shortcode-info);
    background: #eff6ff;
}

.quiz-option-indicator {
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid var(--shortcode-border);
    border-radius: 50%;
    position: relative;
    flex-shrink: 0;
    transition: var(--shortcode-transition-fast);
}

.quiz-option-input:checked + .quiz-option-label .quiz-option-indicator {
    border-color: var(--shortcode-info);
    background: var(--shortcode-info);
}

.quiz-option-input:checked + .quiz-option-label .quiz-option-indicator::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0.5rem;
    height: 0.5rem;
    background: white;
    border-radius: 50%;
}

.quiz-option-text {
    flex: 1;
    font-weight: 500;
}

.quiz-controls {
    padding: 1rem 2rem;
    background: var(--shortcode-bg-light);
    border-top: 1px solid var(--shortcode-border);
}

.check-answer-btn {
    background: var(--shortcode-info);
    color: white;
    border: none;
    border-radius: var(--shortcode-radius-sm);
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    transition: var(--shortcode-transition-fast);
}

.check-answer-btn:hover {
    background: #0369a1;
    transform: translateY(-1px);
}

.quiz-explanation {
    padding: 1.5rem 2rem;
    background: #f0fdf4;
    border-top: 1px solid var(--shortcode-border);
}

.explanation-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: var(--shortcode-secondary);
}

.explanation-content {
    color: var(--shortcode-text-secondary);
    line-height: 1.6;
}

/* Quiz result states */
.quiz-option.correct .quiz-option-label {
    border-color: var(--shortcode-success);
    background: #f0fdf4;
}

.quiz-option.incorrect .quiz-option-label {
    border-color: var(--shortcode-error);
    background: #fef2f2;
}

/* ========================================
   NAVIGATION AND STRUCTURE COMPONENTS
   ======================================== */

/* Lesson Summary */
.lesson-summary {
    background: var(--shortcode-bg-white);
    border: 2px solid var(--shortcode-primary);
    border-radius: var(--shortcode-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shortcode-shadow-md);
    position: relative;
}

.lesson-summary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--shortcode-primary);
}

.summary-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.summary-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--shortcode-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.summary-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--shortcode-text-primary);
    margin: 0;
}

.summary-content {
    color: var(--shortcode-text-secondary);
    line-height: 1.6;
}

/* Next Steps */
.next-steps {
    background: linear-gradient(135deg, var(--shortcode-bg-white) 0%, #f0fdf4 100%);
    border: 2px solid var(--shortcode-secondary);
    border-radius: var(--shortcode-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shortcode-shadow-md);
    position: relative;
}

.next-steps::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--shortcode-secondary);
}

.next-steps-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.next-steps-icon {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--shortcode-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.next-steps-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--shortcode-text-primary);
    margin: 0;
}

.next-steps-content {
    color: var(--shortcode-text-secondary);
    line-height: 1.6;
}

/* Lesson Resources */
.lesson-resources {
    background: var(--shortcode-bg-white);
    border: 1px solid var(--shortcode-border);
    border-radius: var(--shortcode-radius);
    margin: 2rem 0;
    box-shadow: var(--shortcode-shadow-sm);
    overflow: hidden;
}

.resources-header {
    background: var(--shortcode-bg-light);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid var(--shortcode-border);
}

.resources-icon {
    color: var(--shortcode-primary);
    font-size: 1.25rem;
}

.resources-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--shortcode-text-primary);
    margin: 0;
}

.resources-content {
    padding: 1.5rem 2rem;
}

.resource-item {
    margin-bottom: 1rem;
}

.resource-item:last-child {
    margin-bottom: 0;
}

.resource-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    border: 1px solid var(--shortcode-border);
    border-radius: var(--shortcode-radius-sm);
    text-decoration: none;
    color: var(--shortcode-text-primary);
    transition: var(--shortcode-transition-fast);
    background: var(--shortcode-bg-white);
}

.resource-link:hover {
    border-color: var(--shortcode-primary);
    background: #eff6ff;
    transform: translateX(4px);
}

.resource-icon {
    color: var(--shortcode-primary);
    font-size: 1.1rem;
}

.resource-title {
    font-weight: 500;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    .lesson-intro,
    .lesson-objectives,
    .lesson-section,
    .exercise-container,
    .quiz-question,
    .lesson-summary,
    .next-steps,
    .lesson-resources {
        margin: 1.5rem 0;
        padding: 1.5rem;
    }
    
    .intro-header,
    .objectives-header,
    .section-header,
    .exercise-header,
    .quiz-question-header,
    .summary-header,
    .next-steps-header,
    .resources-header {
        padding: 1rem 1.5rem;
    }
    
    .section-content,
    .exercise-content {
        padding: 1.5rem;
    }
    
    .interactive-code-controls {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .run-code-btn,
    .reset-code-btn {
        justify-content: center;
    }
    
    .exercise-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .quiz-options {
        padding: 1rem 1.5rem;
    }
    
    .quiz-controls {
        padding: 1rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .intro-header,
    .objectives-header,
    .exercise-header,
    .summary-header,
    .next-steps-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .code-block-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .interactive-code-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}

/* ========================================
   ANIMATIONS AND TRANSITIONS
   ======================================== */

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

.lesson-intro,
.lesson-objectives,
.lesson-section,
.exercise-container,
.quiz-question,
.lesson-summary,
.next-steps,
.lesson-resources {
    animation: slideInUp 0.6s ease-out;
}

.quiz-explanation {
    animation: fadeIn 0.3s ease-out;
}

.interactive-code-result {
    animation: slideInUp 0.4s ease-out;
}

.run-code-btn:active {
    animation: pulse 0.2s ease-out;
}