/* ==========================================
   Harvard Business School Course Introduction Module 0.1
   哈佛商学院级别课程介绍模块专用样式
   ========================================== */

/* === 1. Course Introduction Root Variables === */
:root {
    /* Course Introduction Specific Colors */
    --hbs-introduction-primary: #A41E22;           /* Harvard Crimson */
    --hbs-introduction-secondary: #0d4f3c;         /* Carbon Forest Green */
    --hbs-introduction-accent: #C8A882;            /* Academic Gold */
    --hbs-introduction-navy: #1C2957;              /* Academic Navy */
    
    /* Common Variables */
    --harvard-crimson: #A41E22;
    --carbon-forest: #0d4f3c;
    --academic-gold: #C8A882;
    --academic-charcoal: #1C2957;
    --academic-paper: #ffffff;
    --academic-light-gray: #f1f5f9;
    
    /* Typography */
    --font-family-serif: "Times New Roman", Times, serif;
    --font-family-sans: "Helvetica Neue", Arial, sans-serif;
    --font-weight-normal: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-black: 900;
    --line-height-relaxed: 1.6;
    
    /* Spacing */
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --golden-md: 1.618rem;
    --golden-lg: 2.618rem;
    --golden-xl: 4.236rem;
    
    /* Other */
    --radius-xl: 12px;
    --radius-full: 50px;
    --transition-elegant: all 0.3s ease;
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-floating: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-elevated: 0 12px 32px rgba(0, 0, 0, 0.1);
    
    /* Professional Background Gradients */
    --hbs-hero-gradient: linear-gradient(135deg, 
        #fdfcf7 0%, 
        #f8f6f0 50%, 
        #fefcf7 100%);
    --hbs-card-gradient: linear-gradient(135deg, 
        #ffffff 0%, 
        #fefcf7 100%);
    --hbs-authority-gradient: linear-gradient(135deg, 
        var(--hbs-introduction-primary) 0%, 
        var(--hbs-introduction-navy) 100%);
        
    /* Course Introduction Typography */
    --hbs-intro-title-size: clamp(2.5rem, 5vw, 4rem);
    --hbs-intro-subtitle-size: clamp(1.125rem, 2.5vw, 1.5rem);
    --hbs-intro-body-size: clamp(1rem, 1.5vw, 1.125rem);
    
    /* Course Introduction Spacing */
    --hbs-section-padding: clamp(3rem, 8vw, 6rem);
    --hbs-card-padding: clamp(1.5rem, 4vw, 3rem);
    --hbs-element-gap: clamp(1rem, 3vw, 2rem);
}

/* === 2. Course Introduction Layout === */
.course-introduction-container {
    background: var(--hbs-hero-gradient);
    min-height: 100vh;
    position: relative;
    overflow: hidden;
    padding: 2rem;
}

/* HBS Hero Section */
.hbs-hero-section {
    text-align: center;
    padding: 3rem 0;
    margin-bottom: 3rem;
}

.hbs-course-badge {
    display: inline-block;
    background: var(--hbs-authority-gradient);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hbs-hero-title {
    font-family: var(--font-family-serif);
    font-size: var(--hbs-intro-title-size);
    font-weight: var(--font-weight-bold);
    color: var(--harvard-crimson);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hbs-hero-subtitle {
    font-size: var(--hbs-intro-subtitle-size);
    color: var(--academic-charcoal);
    margin-bottom: 2rem;
    line-height: var(--line-height-relaxed);
}

.hbs-instructor-line {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.instructor-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 3px solid var(--harvard-crimson);
}

.instructor-info {
    text-align: left;
}

.instructor-name {
    font-weight: var(--font-weight-bold);
    color: var(--harvard-crimson);
    font-size: 1.1rem;
}

.instructor-title {
    color: var(--academic-charcoal);
    font-size: 0.9rem;
}

/* Section Headers */
.hbs-section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.hbs-section-title {
    font-family: var(--font-family-serif);
    font-size: 2rem;
    color: var(--harvard-crimson);
    margin-bottom: 1rem;
    font-weight: var(--font-weight-bold);
}

.hbs-section-divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--harvard-crimson), var(--academic-gold));
    margin: 0 auto 1rem;
    border-radius: 2px;
}

.hbs-section-description {
    color: var(--academic-charcoal);
    font-size: 1.1rem;
    line-height: var(--line-height-relaxed);
    max-width: 600px;
    margin: 0 auto;
}

/* Authority Section */
.hbs-authority-section {
    margin: 4rem 0;
}

.hbs-authority-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.hbs-authority-card {
    background: var(--hbs-card-gradient);
    border: 2px solid var(--academic-light-gray);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    transition: var(--transition-elegant);
    box-shadow: var(--shadow-card);
}

.hbs-authority-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-floating);
    border-color: var(--harvard-crimson);
}

.authority-icon-wrapper {
    margin-bottom: 1.5rem;
}

.authority-icon {
    font-size: 3rem;
    color: var(--harvard-crimson);
}

.authority-title {
    font-size: 1.3rem;
    font-weight: var(--font-weight-bold);
    color: var(--harvard-crimson);
    margin-bottom: 0.5rem;
}

.authority-subtitle {
    font-size: 1rem;
    color: var(--academic-gold);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 1rem;
}

.authority-description {
    color: var(--academic-charcoal);
    line-height: var(--line-height-relaxed);
}

/* Stats Section */
.hbs-stats-section {
    margin: 4rem 0;
}

.hbs-stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.hbs-stat-card {
    background: var(--hbs-card-gradient);
    border: 2px solid var(--academic-light-gray);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    transition: var(--transition-elegant);
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}

.hbs-stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--harvard-crimson), var(--academic-gold));
}

.hbs-stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-floating);
}

.hbs-stat-card.featured {
    border-color: var(--harvard-crimson);
    background: linear-gradient(135deg, #fefcf7, #fff5f5);
}

.stat-number {
    font-family: var(--font-family-serif);
    font-size: 3rem;
    font-weight: var(--font-weight-black);
    color: var(--harvard-crimson);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-unit {
    font-size: 1.1rem;
    color: var(--academic-gold);
    font-weight: var(--font-weight-semibold);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--academic-charcoal);
    font-size: 0.9rem;
    line-height: var(--line-height-relaxed);
    margin-bottom: 1rem;
}

.stat-progress {
    width: 100%;
    height: 4px;
    background: var(--academic-light-gray);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--harvard-crimson), var(--academic-gold));
    border-radius: 2px;
    transition: width 2s ease-out;
}

.course-introduction-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" patternUnits="userSpaceOnUse" width="100" height="100"><circle cx="50" cy="50" r="0.5" fill="%23A41E22" opacity="0.03"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>') repeat;
    pointer-events: none;
}

.course-intro-hero {
    padding: var(--hbs-section-padding) 0;
    position: relative;
    z-index: 1;
}

/* === 3. Harvard-Style Authority Section === */
.hbs-authority-section {
    text-align: center;
    margin-bottom: var(--golden-xl);
    animation: harvardFadeIn 0.8s ease-out;
}

.hbs-university-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    background: var(--hbs-authority-gradient);
    color: white;
    padding: var(--space-md) var(--golden-md);
    border-radius: var(--radius-full);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--golden-lg);
    box-shadow: var(--shadow-elevated);
    position: relative;
    overflow: hidden;
}

.hbs-university-badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.hbs-university-badge i {
    font-size: 1.2em;
    color: var(--academic-gold);
}

/* === 4. Harvard-Style Course Title === */
.hbs-course-title {
    font-family: var(--font-family-serif);
    font-size: var(--hbs-intro-title-size);
    font-weight: var(--font-weight-bold);
    color: var(--harvard-crimson);
    line-height: 1.1;
    margin-bottom: var(--golden-md);
    text-align: center;
    position: relative;
}

.hbs-course-title .title-main {
    display: block;
    margin-bottom: var(--space-sm);
}

.hbs-course-title .title-emphasis {
    display: block;
    font-size: 0.75em;
    color: var(--carbon-forest);
    font-weight: var(--font-weight-semibold);
    font-style: italic;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hbs-course-subtitle {
    font-family: var(--font-family-serif);
    font-size: var(--hbs-intro-subtitle-size);
    font-weight: var(--font-weight-normal);
    color: var(--academic-charcoal);
    line-height: var(--line-height-relaxed);
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--golden-xl);
    position: relative;
}

/* === 5. Harvard-Style Statistics Cards === */
.hbs-stats-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--golden-md);
    margin: var(--golden-xl) 0;
    padding: 0 var(--space-lg);
}

.hbs-stat-card {
    background: var(--hbs-card-gradient);
    border: 2px solid var(--academic-light-gray);
    border-radius: var(--radius-xl);
    padding: var(--golden-lg);
    text-align: center;
    position: relative;
    transition: all var(--transition-elegant);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.hbs-stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--harvard-crimson), 
        var(--carbon-forest)
    );
}

.hbs-stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-floating);
    border-color: var(--harvard-crimson-light);
}

.hbs-stat-number {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-display);
    font-weight: var(--font-weight-black);
    color: var(--harvard-crimson);
    line-height: 1;
    margin-bottom: var(--space-sm);
    display: block;
}

.hbs-stat-label {
    font-family: var(--font-family-sans);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    color: var(--academic-slate);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-xs);
}

.hbs-stat-description {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-caption);
    color: var(--academic-silver);
    font-style: italic;
    line-height: var(--line-height-normal);
}

/* === 6. Harvard-Style Professor Showcase === */
.hbs-professor-showcase {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--golden-xl);
    align-items: center;
    background: var(--academic-paper);
    border-radius: var(--radius-2xl);
    padding: var(--golden-xl);
    margin: var(--golden-xl) 0;
    box-shadow: var(--shadow-elevated);
    border: 1px solid var(--academic-light-gray);
    position: relative;
    overflow: hidden;
}

.hbs-professor-showcase::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, 
        var(--harvard-crimson) 0%, 
        var(--academic-gold) 50%, 
        var(--carbon-forest) 100%
    );
}

.hbs-professor-image-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hbs-professor-image {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    border: 6px solid var(--academic-paper);
    box-shadow: var(--shadow-elevated);
    position: relative;
    z-index: 2;
}

.hbs-professor-image::before {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    background: linear-gradient(135deg, 
        var(--harvard-crimson), 
        var(--carbon-forest)
    );
    z-index: -1;
}

.hbs-professor-credentials {
    margin-top: var(--space-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.hbs-credential-badge {
    background: var(--harvard-crimson);
    color: white;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-caption);
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.hbs-professor-details {
    text-align: left;
}

.hbs-professor-name {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-h1);
    font-weight: var(--font-weight-bold);
    color: var(--harvard-crimson);
    margin-bottom: var(--space-sm);
    line-height: var(--line-height-tight);
}

.hbs-professor-title {
    font-family: var(--font-family-sans);
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-semibold);
    color: var(--carbon-forest);
    margin-bottom: var(--space-md);
    line-height: var(--line-height-normal);
}

.hbs-professor-bio {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-body);
    color: var(--academic-charcoal);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--golden-md);
}

.hbs-professor-expertise {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--golden-md);
}

.hbs-expertise-tag {
    background: var(--carbon-mint);
    color: var(--carbon-forest);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-medium);
    border: 1px solid var(--carbon-sage);
}

.hbs-professor-links {
    display: flex;
    gap: var(--space-lg);
}

.hbs-prof-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--academic-paper);
    border: 2px solid var(--harvard-crimson);
    border-radius: var(--radius-lg);
    color: var(--harvard-crimson);
    text-decoration: none;
    font-family: var(--font-family-sans);
    font-weight: var(--font-weight-semibold);
    transition: all var(--transition-smooth);
}

.hbs-prof-link:hover {
    background: var(--harvard-crimson);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevated);
}

/* === 7. Harvard-Style Learning Pathway === */
.hbs-learning-pathway {
    margin: var(--golden-xl) 0;
    position: relative;
}

.hbs-pathway-header {
    text-align: center;
    margin-bottom: var(--golden-xl);
}

.hbs-pathway-title {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-h1);
    font-weight: var(--font-weight-bold);
    color: var(--harvard-crimson);
    margin-bottom: var(--space-lg);
}

.hbs-pathway-description {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-lg);
    color: var(--academic-charcoal);
    line-height: var(--line-height-relaxed);
    max-width: 700px;
    margin: 0 auto;
}

.hbs-pathway-flow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--golden-md);
    position: relative;
}

.hbs-pathway-stage {
    background: var(--hbs-card-gradient);
    border: 2px solid var(--academic-light-gray);
    border-radius: var(--radius-xl);
    padding: var(--golden-lg);
    position: relative;
    transition: all var(--transition-elegant);
    box-shadow: var(--shadow-card);
    text-align: center;
}

.hbs-pathway-stage:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-floating);
    border-color: var(--harvard-crimson-light);
}

.hbs-pathway-stage.primary {
    border-color: var(--harvard-crimson);
    background: linear-gradient(135deg, 
        var(--academic-paper) 0%, 
        #fdf2f2 100%
    );
}

.hbs-pathway-stage.secondary {
    border-color: var(--carbon-forest);
    background: linear-gradient(135deg, 
        var(--academic-paper) 0%, 
        var(--carbon-mint) 100%
    );
}

.hbs-stage-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    background: var(--harvard-crimson);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-family-sans);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-small);
    box-shadow: var(--shadow-card);
}

.hbs-stage-icon {
    font-size: 3rem;
    color: var(--harvard-crimson);
    margin-bottom: var(--space-lg);
    display: block;
}

.hbs-stage-title {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-h3);
    font-weight: var(--font-weight-semibold);
    color: var(--harvard-crimson-dark);
    margin-bottom: var(--space-md);
    line-height: var(--line-height-tight);
}

.hbs-stage-description {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-body);
    color: var(--academic-charcoal);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--space-lg);
}

.hbs-stage-features {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
}

.hbs-stage-features li {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-small);
    color: var(--academic-slate);
    line-height: var(--line-height-normal);
    margin-bottom: var(--space-sm);
    position: relative;
    padding-left: var(--space-lg);
}

.hbs-stage-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-academic);
    font-weight: var(--font-weight-bold);
}

/* === 8. Harvard-Style Feature Highlights === */
.hbs-feature-highlights {
    margin: var(--golden-xl) 0;
}

.hbs-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--golden-md);
}

.hbs-feature-card {
    background: var(--hbs-card-gradient);
    border: 1px solid var(--academic-light-gray);
    border-radius: var(--radius-xl);
    padding: var(--golden-lg);
    text-align: center;
    position: relative;
    transition: all var(--transition-elegant);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.hbs-feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, 
        var(--harvard-crimson), 
        var(--carbon-forest)
    );
}

.hbs-feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-elevated);
    border-color: var(--harvard-crimson-light);
}

.hbs-feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, 
        var(--harvard-crimson), 
        var(--harvard-crimson-dark)
    );
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
    box-shadow: var(--shadow-card);
}

.hbs-feature-icon i {
    font-size: 2rem;
    color: white;
}

.hbs-feature-title {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-h4);
    font-weight: var(--font-weight-semibold);
    color: var(--harvard-crimson-dark);
    margin-bottom: var(--space-md);
    line-height: var(--line-height-tight);
}

.hbs-feature-description {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-body);
    color: var(--academic-charcoal);
    line-height: var(--line-height-relaxed);
}

/* === 9. Harvard-Style Call-to-Action === */
.hbs-cta-section {
    background: var(--hbs-card-gradient);
    border-radius: var(--radius-2xl);
    padding: var(--golden-xl);
    text-align: center;
    margin: var(--golden-xl) 0;
    border: 2px solid var(--harvard-crimson-light);
    box-shadow: var(--shadow-elevated);
    position: relative;
    overflow: hidden;
}

.hbs-cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, 
        var(--harvard-crimson) 0%, 
        var(--academic-gold) 50%, 
        var(--carbon-forest) 100%
    );
}

.hbs-cta-title {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-h2);
    font-weight: var(--font-weight-bold);
    color: var(--harvard-crimson);
    margin-bottom: var(--space-lg);
    line-height: var(--line-height-tight);
}

.hbs-cta-description {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-lg);
    color: var(--academic-charcoal);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--golden-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hbs-cta-buttons {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.hbs-cta-primary {
    background: linear-gradient(135deg, 
        var(--harvard-crimson), 
        var(--harvard-crimson-dark)
    );
    color: white;
    border: none;
    padding: var(--space-lg) var(--golden-lg);
    border-radius: var(--radius-lg);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    box-shadow: var(--shadow-card);
    text-decoration: none;
}

.hbs-cta-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-floating);
}

.hbs-cta-secondary {
    background: var(--academic-paper);
    color: var(--harvard-crimson);
    border: 2px solid var(--harvard-crimson);
    padding: var(--space-lg) var(--golden-lg);
    border-radius: var(--radius-lg);
    font-family: var(--font-family-sans);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    text-decoration: none;
}

.hbs-cta-secondary:hover {
    background: var(--harvard-crimson);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-card);
}

/* === 10. Harvard-Style Progress Indicator === */
.hbs-progress-pathway {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: var(--golden-xl) 0;
    position: relative;
    padding: 0 var(--space-lg);
}

.hbs-progress-pathway::before {
    content: '';
    position: absolute;
    top: 50%;
    left: var(--space-lg);
    right: var(--space-lg);
    height: 3px;
    background: linear-gradient(90deg, 
        var(--harvard-crimson), 
        var(--carbon-forest)
    );
    border-radius: var(--radius-sm);
    z-index: 1;
}

.hbs-progress-step {
    background: var(--academic-paper);
    border: 3px solid var(--harvard-crimson);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-family-sans);
    font-weight: var(--font-weight-bold);
    color: var(--harvard-crimson);
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-smooth);
}

.hbs-progress-step:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-elevated);
}

.hbs-progress-step.completed {
    background: var(--harvard-crimson);
    color: white;
}

.hbs-progress-step.active {
    background: var(--academic-gold);
    border-color: var(--academic-gold);
    color: var(--academic-charcoal);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { 
        box-shadow: var(--shadow-card), 0 0 0 0 rgba(164, 30, 34, 0.4); 
    }
    50% { 
        box-shadow: var(--shadow-card), 0 0 0 20px rgba(164, 30, 34, 0); 
    }
}

/* === 11. Responsive Design === */
@media (max-width: 1024px) {
    .hbs-professor-showcase {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--golden-md);
    }
    
    .hbs-professor-details {
        text-align: center;
    }
    
    .hbs-pathway-flow {
        grid-template-columns: 1fr;
    }
    
    .hbs-features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

@media (max-width: 768px) {
    :root {
        --hbs-section-padding: clamp(2rem, 6vw, 4rem);
        --hbs-card-padding: clamp(1rem, 3vw, 2rem);
    }
    
    .hbs-stats-showcase {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-lg);
    }
    
    .hbs-cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hbs-cta-primary,
    .hbs-cta-secondary {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .hbs-professor-links {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .hbs-progress-pathway {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .hbs-progress-pathway::before {
        display: none;
    }
}

@media (max-width: 480px) {
    .hbs-stats-showcase {
        grid-template-columns: 1fr;
    }
    
    .hbs-professor-image {
        width: 120px;
        height: 120px;
    }
    
    .hbs-stage-features {
        text-align: center;
    }
    
    .hbs-stage-features li {
        padding-left: 0;
    }
    
    .hbs-stage-features li::before {
        position: static;
        margin-right: var(--space-sm);
    }
}

/* === 12. Print Styles === */
@media print {
    .hbs-cta-section,
    .hbs-cta-buttons {
        display: none;
    }
    
    .hbs-pathway-stage,
    .hbs-feature-card,
    .hbs-stat-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--academic-charcoal);
    }
    
    .hbs-professor-showcase {
        break-inside: avoid;
    }
}

/* === 13. Enhanced Accessibility === */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .hbs-progress-step.active {
        animation: none;
    }
}

@media (prefers-contrast: high) {
    :root {
        --harvard-crimson: #000000;
        --carbon-forest: #000000;
        --academic-charcoal: #000000;
        --academic-paper: #ffffff;
    }
}

/* === 14. Learning Pathway Table Styles === */
.hbs-pathway-table {
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(164, 30, 34, 0.1);
    overflow: hidden;
    margin: 2rem 0;
    border: 2px solid #f1f5f9;
}

.pathway-table-header {
    display: grid;
    grid-template-columns: 1.5fr 2fr 1fr 1.2fr 1.8fr;
    gap: 0;
    background: linear-gradient(135deg, var(--hbs-introduction-primary), var(--hbs-introduction-navy));
    color: white;
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pathway-table-header .table-cell {
    padding: 1.5rem 1rem;
    text-align: center;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.pathway-table-header .table-cell:last-child {
    border-right: none;
}

.pathway-table-body {
    background: white;
}

.pathway-table-row {
    display: grid;
    grid-template-columns: 1.5fr 2fr 1fr 1.2fr 1.8fr;
    gap: 0;
    border-bottom: 1px solid #f1f5f9;
    transition: all 0.3s ease;
    position: relative;
}

.pathway-table-row:hover {
    background: linear-gradient(135deg, #fefcf7, #f8f6f0);
    box-shadow: inset 4px 0 0 var(--hbs-introduction-primary);
}

.pathway-table-row.foundation:hover { box-shadow: inset 4px 0 0 #3b82f6; }
.pathway-table-row.practice:hover { box-shadow: inset 4px 0 0 #10b981; }
.pathway-table-row.international:hover { box-shadow: inset 4px 0 0 #8b5cf6; }
.pathway-table-row.advanced:hover { box-shadow: inset 4px 0 0 #f59e0b; }
.pathway-table-row.comprehensive:hover { box-shadow: inset 4px 0 0 #ef4444; }

.pathway-table-row .table-cell {
    padding: 1.5rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-right: 1px solid #f1f5f9;
}

.pathway-table-row .table-cell:last-child {
    border-right: none;
}

.stage-info {
    flex-direction: column;
    gap: 0.5rem;
}

.stage-badge {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--hbs-introduction-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    margin: 0 auto 0.5rem;
}

.foundation .stage-badge { background: #3b82f6; }
.practice .stage-badge { background: #10b981; }
.international .stage-badge { background: #8b5cf6; }
.advanced .stage-badge { background: #f59e0b; }
.comprehensive .stage-badge { background: #ef4444; }

.stage-details h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--hbs-introduction-navy);
    margin: 0;
}

.stage-type {
    font-size: 0.75rem;
    color: #64748b;
    font-style: italic;
}

.module-info {
    flex-direction: column;
    gap: 0.75rem;
    text-align: left;
}

.module-info strong {
    color: var(--hbs-introduction-navy);
    font-size: 1rem;
    line-height: 1.3;
}

.module-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.topic-tag {
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
    color: #475569;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid #e2e8f0;
}

.duration-badge {
    background: linear-gradient(135deg, var(--hbs-introduction-accent), #d4af37);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 4px 12px rgba(200, 168, 130, 0.3);
}

.duration-badge.featured {
    background: linear-gradient(135deg, var(--hbs-introduction-primary), #dc2626);
    animation: pulse 2s infinite;
}

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

.skill-level {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.skill-level i {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

.foundation-level i { color: #3b82f6; }
.practice-level i { color: #10b981; }
.international-level i { color: #8b5cf6; }
.advanced-level i { color: #f59e0b; }
.comprehensive-level i { color: #ef4444; }

.skill-level span {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--hbs-introduction-navy);
}

.outcome-text {
    font-size: 0.9rem;
    line-height: 1.4;
    color: var(--hbs-introduction-navy);
    font-weight: 500;
}

/* Learning Progress Visualization */
.hbs-learning-progress {
    margin: 3rem 0;
    background: linear-gradient(135deg, #fefcf7, #f8f6f0);
    border-radius: 16px;
    padding: 2rem;
    border: 2px solid #f1f5f9;
}

.progress-header {
    text-align: center;
    margin-bottom: 2rem;
}

.progress-header h3 {
    font-size: 1.5rem;
    color: var(--hbs-introduction-navy);
    margin-bottom: 0.5rem;
}

.progress-header p {
    color: #64748b;
    font-size: 1rem;
}

.progress-flow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.progress-stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 120px;
}

.progress-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.foundation .progress-icon { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.practice .progress-icon { background: linear-gradient(135deg, #10b981, #047857); }
.international .progress-icon { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.advanced .progress-icon { background: linear-gradient(135deg, #f59e0b, #d97706); }
.comprehensive .progress-icon { background: linear-gradient(135deg, #ef4444, #dc2626); }

.progress-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--hbs-introduction-navy);
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--hbs-introduction-primary), var(--hbs-introduction-accent));
    border-radius: 3px;
    width: var(--progress-width, 0%);
    animation: progressFill 2s ease-out;
}

@keyframes progressFill {
    from { width: 0%; }
}

.progress-arrow {
    font-size: 1.5rem;
    color: var(--hbs-introduction-primary);
    font-weight: bold;
    flex-shrink: 0;
}

/* Responsive Design for Table */
@media (max-width: 1024px) {
    .pathway-table-header,
    .pathway-table-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .pathway-table-row {
        border-bottom: 2px solid #f1f5f9;
        padding: 1rem 0;
    }
    
    .pathway-table-row .table-cell {
        border-right: none;
        border-bottom: 1px solid #f8fafc;
        padding: 1rem;
        text-align: left;
        justify-content: flex-start;
    }
    
    .stage-info {
        flex-direction: row;
        justify-content: flex-start;
        gap: 1rem;
    }
    
    .stage-badge {
        margin: 0;
    }
    
    .module-topics {
        justify-content: flex-start;
    }
    
    .duration-info,
    .skills-info,
    .outcome-info {
        justify-content: flex-start;
    }
}

@media (max-width: 768px) {
    .progress-flow {
        flex-direction: column;
        gap: 2rem;
    }
    
    .progress-arrow {
        transform: rotate(90deg);
    }
    
    .progress-stage {
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
}

/* === Additional Styles for 0.2 and 0.3 === */

/* Learning Approaches Styles */
.learning-approaches {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 1rem;
}

.approach {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 1.5rem;
}

.approach h4 {
    color: var(--harvard-crimson);
    margin-bottom: 1rem;
    font-weight: var(--font-weight-bold);
}

.approach ul {
    list-style: none;
    padding: 0;
}

.approach li {
    padding: 0.5rem 0;
    color: var(--academic-charcoal);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.approach li i {
    color: var(--harvard-crimson);
    width: 16px;
}

/* Application Grid Styles */
.application-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.app-item {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    transition: var(--transition-elegant);
}

.app-item:hover {
    background: #f1f5f9;
    border-color: var(--harvard-crimson);
}

.app-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.app-item h4 {
    color: var(--harvard-crimson);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
}

.app-item p {
    color: var(--academic-charcoal);
    line-height: 1.5;
}

/* Features Grid Styles for 0.1 */
.hbs-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.hbs-feature-card {
    background: var(--hbs-card-gradient);
    border: 2px solid var(--academic-light-gray);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: var(--transition-elegant);
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
}

.hbs-feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-floating);
}

.hbs-feature-card.primary { border-top: 6px solid #3b82f6; }
.hbs-feature-card.secondary { border-top: 6px solid #10b981; }
.hbs-feature-card.accent { border-top: 6px solid #8b5cf6; }
.hbs-feature-card.highlight { border-top: 6px solid #f59e0b; }

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

.feature-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--harvard-crimson);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: 1.1rem;
}

.feature-icon i {
    font-size: 2rem;
    color: var(--harvard-crimson);
}

.feature-title {
    color: var(--harvard-crimson);
    margin-bottom: 1rem;
    font-weight: var(--font-weight-bold);
    font-size: 1.3rem;
}

.feature-description {
    color: var(--academic-charcoal);
    line-height: var(--line-height-relaxed);
    margin-bottom: 1.5rem;
}

.feature-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.highlight-item {
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
    color: var(--academic-charcoal);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid #e2e8f0;
}

/* CTA Section Styles */
.hbs-cta-section {
    margin: 4rem 0;
    background: linear-gradient(135deg, #fefcf7, #f8f6f0);
    border-radius: var(--radius-xl);
    padding: 3rem 2rem;
    text-align: center;
    border: 2px solid #f1f5f9;
}

.hbs-cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-family: var(--font-family-serif);
    font-size: 2rem;
    color: var(--harvard-crimson);
    margin-bottom: 1rem;
    font-weight: var(--font-weight-bold);
}

.cta-subtitle {
    color: var(--academic-charcoal);
    font-size: 1.1rem;
    line-height: var(--line-height-relaxed);
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Responsive Design for 0.2 and 0.3 */
@media (max-width: 768px) {
    .learning-approaches {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .application-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .hbs-features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .strategy-phase {
        flex-direction: column;
        gap: 1rem;
    }
    
    .phase-indicator {
        flex-direction: row;
        align-items: center;
        gap: 1rem;
    }
    
    .phase-line {
        width: 50px;
        height: 2px;
    }
    
    .hbs-career-paths {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .capability-dimensions {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Content Overview Styles */
.hbs-content-overview {
    margin: 4rem 0;
}

.hbs-modules-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.hbs-module-card {
    background: var(--hbs-card-gradient);
    border: 2px solid var(--academic-light-gray);
    border-radius: var(--radius-xl);
    padding: 2rem;
    transition: var(--transition-elegant);
    box-shadow: var(--shadow-card);
}

.hbs-module-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-floating);
}

.hbs-module-card.foundation { border-left: 6px solid #3b82f6; }
.hbs-module-card.practice { border-left: 6px solid #10b981; }
.hbs-module-card.international { border-left: 6px solid #8b5cf6; }
.hbs-module-card.advanced { border-left: 6px solid #f59e0b; }
.hbs-module-card.comprehensive { border-left: 6px solid #ef4444; }

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

.module-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--harvard-crimson);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
}

.module-icon i {
    font-size: 2rem;
    color: var(--harvard-crimson);
}

.module-badge {
    background: var(--academic-gold);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: auto;
}

.module-title {
    font-size: 1.5rem;
    color: var(--harvard-crimson);
    margin-bottom: 1rem;
    font-weight: var(--font-weight-bold);
}

.module-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.module-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--academic-charcoal);
    font-size: 0.9rem;
}

.module-topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.topic-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 1rem;
    transition: var(--transition-elegant);
}

.topic-card:hover {
    background: #f1f5f9;
    border-color: var(--harvard-crimson);
}

.topic-card h5 {
    color: var(--harvard-crimson);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
}

.topic-card p {
    color: var(--academic-charcoal);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.topic-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background: var(--harvard-crimson);
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Learning Objectives Styles */
.hbs-objectives-section {
    margin: 4rem 0;
}

.hbs-objectives-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.objective-card {
    background: var(--hbs-card-gradient);
    border: 2px solid var(--academic-light-gray);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    transition: var(--transition-elegant);
    box-shadow: var(--shadow-card);
}

.objective-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-floating);
}

.objective-card.knowledge { border-top: 4px solid #3b82f6; }
.objective-card.skills { border-top: 4px solid #10b981; }
.objective-card.application { border-top: 4px solid #f59e0b; }
.objective-card.strategic { border-top: 4px solid #8b5cf6; }

.objective-icon {
    margin-bottom: 1rem;
}

.objective-icon i {
    font-size: 3rem;
    color: var(--harvard-crimson);
}

.objective-card h3 {
    color: var(--harvard-crimson);
    margin-bottom: 1rem;
    font-weight: var(--font-weight-bold);
}

.objective-card ul {
    text-align: left;
    list-style: none;
    padding: 0;
}

.objective-card li {
    padding: 0.5rem 0;
    color: var(--academic-charcoal);
    position: relative;
    padding-left: 1.5rem;
}

.objective-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--harvard-crimson);
    font-weight: bold;
}

/* Strategy Timeline Styles */
.hbs-strategy-section {
    margin: 4rem 0;
}

.hbs-strategy-timeline {
    position: relative;
    margin-top: 3rem;
}

.strategy-phase {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    align-items: flex-start;
}

.phase-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
}

.phase-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--harvard-crimson);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.phase-line {
    width: 2px;
    height: 100px;
    background: var(--academic-light-gray);
}

.phase-card {
    background: var(--hbs-card-gradient);
    border: 2px solid var(--academic-light-gray);
    border-radius: var(--radius-xl);
    padding: 2rem;
    flex: 1;
    box-shadow: var(--shadow-card);
    transition: var(--transition-elegant);
}

.phase-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-floating);
}

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

.phase-icon i {
    font-size: 2rem;
    color: var(--harvard-crimson);
}

.phase-info h3 {
    color: var(--harvard-crimson);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-bold);
}

.phase-duration {
    color: var(--academic-gold);
    font-size: 0.9rem;
    font-weight: 600;
}

.strategy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.strategy-item h4 {
    color: var(--harvard-crimson);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.strategy-item p {
    color: var(--academic-charcoal);
    margin-bottom: 1rem;
    line-height: 1.5;
}

.resources {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.resource-tag {
    background: #f1f5f9;
    color: var(--academic-charcoal);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    border: 1px solid #e2e8f0;
}

/* Career Path Styles */
.hbs-career-section {
    margin: 4rem 0;
}

.hbs-career-paths {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.career-path {
    background: var(--hbs-card-gradient);
    border: 2px solid var(--academic-light-gray);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition-elegant);
}

.career-path:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-floating);
}

.career-path.technical { border-top: 6px solid #3b82f6; }
.career-path.consulting { border-top: 6px solid #10b981; }
.career-path.corporate { border-top: 6px solid #8b5cf6; }

.path-header {
    padding: 2rem;
    text-align: center;
    background: linear-gradient(135deg, #fefcf7, #f8f6f0);
}

.path-icon i {
    font-size: 3rem;
    color: var(--harvard-crimson);
    margin-bottom: 1rem;
}

.path-header h3 {
    color: var(--harvard-crimson);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-bold);
}

.path-header p {
    color: var(--academic-charcoal);
}

.path-levels {
    padding: 1rem;
}

.level-card {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: var(--transition-elegant);
}

.level-card:hover {
    border-color: var(--harvard-crimson);
    background: #fefcf7;
}

.level-info h4 {
    color: var(--harvard-crimson);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-semibold);
}

.level-experience {
    color: var(--academic-charcoal);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.level-salary {
    color: var(--academic-gold);
    font-weight: 600;
    margin-bottom: 1rem;
}

.level-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* Capability Framework Styles */
.hbs-capability-section {
    margin: 4rem 0;
}

.capability-dimensions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.dimension-card {
    background: var(--hbs-card-gradient);
    border: 2px solid var(--academic-light-gray);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-card);
    transition: var(--transition-elegant);
}

.dimension-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-floating);
}

.dimension-card.technical { border-left: 6px solid #3b82f6; }
.dimension-card.business { border-left: 6px solid #10b981; }
.dimension-card.management { border-left: 6px solid #f59e0b; }
.dimension-card.innovation { border-left: 6px solid #8b5cf6; }

.dimension-header {
    text-align: center;
    margin-bottom: 2rem;
}

.dimension-icon i {
    font-size: 2.5rem;
    color: var(--harvard-crimson);
    margin-bottom: 1rem;
}

.dimension-header h3 {
    color: var(--harvard-crimson);
    margin-bottom: 0.5rem;
    font-weight: var(--font-weight-bold);
}

.dimension-header p {
    color: var(--academic-charcoal);
    font-size: 0.9rem;
}

.capability-item {
    margin-bottom: 1.5rem;
}

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.item-name {
    color: var(--academic-charcoal);
    font-weight: 600;
}

.proficiency-badge {
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.proficiency-badge.expert {
    background: #dc2626;
    color: white;
}

.proficiency-badge.advanced {
    background: #f59e0b;
    color: white;
}

.proficiency-badge.intermediate {
    background: #3b82f6;
    color: white;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--harvard-crimson), var(--academic-gold));
    border-radius: 3px;
    transition: width 2s ease-out;
}

/* CTA Styles */
.hbs-nextsteps-section {
    margin: 4rem 0;
    text-align: center;
}

.hbs-btn-primary, .hbs-btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-xl);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-elegant);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    margin: 0.5rem;
}

.hbs-btn-primary {
    background: linear-gradient(135deg, var(--harvard-crimson), #dc2626);
    color: white;
    box-shadow: var(--shadow-card);
}

.hbs-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-floating);
}

.hbs-btn-secondary {
    background: white;
    color: var(--harvard-crimson);
    border: 2px solid var(--harvard-crimson);
}

.hbs-btn-secondary:hover {
    background: var(--harvard-crimson);
    color: white;
}

/* === 15. Dark Mode Support === */
@media (prefers-color-scheme: dark) {
    :root {
        --academic-paper: #1f2937;
        --academic-ivory: #111827;
        --academic-charcoal: #f9fafb;
        --academic-slate: #d1d5db;
        --academic-light-gray: #374151;
    }
    
    .course-introduction-container {
        background: linear-gradient(135deg, #1f2937 0%, #111827 50%, #1f2937 100%);
    }
    
    .hbs-card-gradient {
        background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    }
}