/* ============================================
   HR Presentation Styles
   Design System: Indigo Ink (Editorial)
   ============================================ */

:root {
    /* Color Palette - Indigo Ink */
    --color-primary: #1B0A3C;
    --color-secondary: #3D1E7C;
    --color-accent: #7B68EE;
    --color-light: #E8E0F0;
    --color-white: #FFFFFF;
    --color-gold: #C9A87C;
    --color-text: #2C2C2C;
    --color-text-light: #666666;
    
    /* Typography */
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Manrope', -apple-system, sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Transitions */
    --transition-smooth: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--color-primary);
    color: var(--color-text);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

/* Presentation Container */
.presentation-container {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

/* Progress Bar */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    z-index: 1000;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
    width: 8.33%;
    transition: width 0.5s ease;
}

/* Slide Counter */
.slide-counter {
    position: fixed;
    top: var(--space-md);
    right: var(--space-lg);
    color: var(--color-white);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    z-index: 100;
    opacity: 0.8;
}

/* Slides */
.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    background: var(--color-white);
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

.slide-content {
    width: 100%;
    max-width: 1200px;
    height: 100%;
    max-height: 800px;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Title Slide */
.title-slide {
    justify-content: center;
    align-items: center;
    text-align: center;
}

.college-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.college-logo {
    width: 80px;
    height: 80px;
    background: var(--color-primary);
    color: var(--color-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.college-name {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-primary);
}

.title-decoration {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.title-decoration .line {
    width: 60px;
    height: 1px;
    background: var(--color-gold);
}

.era-badge {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-gold);
    padding: var(--space-xs) var(--space-md);
    border: 1px solid var(--color-gold);
}

.main-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.1;
    margin-bottom: var(--space-md);
    max-width: 900px;
}

.subtitle {
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    font-weight: 300;
    color: var(--color-text-light);
    max-width: 600px;
    line-height: 1.6;
    margin-bottom: var(--space-xl);
}

.author-info {
    margin-top: var(--space-lg);
}

.author-info-full {
    margin-top: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.author-name {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
}

.professor-name {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-light);
}

.date {
    font-size: 0.875rem;
    color: var(--color-text-light);
    letter-spacing: 0.1em;
}

.scroll-hint {
    position: absolute;
    bottom: var(--space-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-light);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    opacity: 0.7;
    animation: bounce 2s infinite;
}

.arrow-down {
    font-size: 1.5rem;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(10px); }
}

/* Slide Header */
.slide-header {
    display: flex;
    align-items: baseline;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-light);
}

.section-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1;
}

.slide-header h2 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 600;
    color: var(--color-primary);
}

.era-date {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--color-text-light);
    margin-left: var(--space-sm);
}

/* Content Grid */
.content-grid {
    display: grid;
    gap: var(--space-xl);
    flex: 1;
    align-items: start;
}

.content-grid.two-col {
    grid-template-columns: 1fr 1fr;
}

/* Text Content */
.text-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.lead-text {
    font-family: var(--font-display);
    font-size: clamp(1.125rem, 1.5vw, 1.375rem);
    font-weight: 400;
    color: var(--color-primary);
    line-height: 1.6;
    font-style: italic;
}

.era-description {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text);
}

/* Key Points */
.key-points {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.point {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
}

.point-marker {
    color: var(--color-accent);
    font-weight: 600;
    font-size: 1.25rem;
    line-height: 1.5;
}

.point p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
}

/* Characteristics */
.characteristics h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.characteristics ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.characteristics li {
    position: relative;
    padding-left: var(--space-md);
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--color-text);
}

.characteristics li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* Info Boxes */
.pioneer-box,
.milestone-box,
.impact-box,
.impact-highlight {
    background: var(--color-light);
    padding: var(--space-md);
    border-left: 3px solid var(--color-accent);
    font-size: 0.95rem;
    line-height: 1.6;
}

.pioneer-box strong,
.milestone-box strong,
.impact-box strong,
.impact-highlight strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* Visual Content */
.visual-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: flex-start;
}

.stat-card {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-lg);
    min-width: 200px;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Chart Containers */
.chart-container {
    background: var(--color-white);
    padding: var(--space-md);
    border: 1px solid var(--color-light);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.chart-container canvas {
    max-height: 300px;
    width: 100%;
}

.chart-container.small canvas {
    max-height: 200px;
}

.chart-caption {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-top: var(--space-sm);
    font-style: italic;
}

/* Hawthorne Grid */
.hawthorne-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.hawthorne-card {
    background: var(--color-light);
    padding: var(--space-lg);
}

.hawthorne-card h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.hawthorne-card p,
.hawthorne-card ul {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-text);
}

.hawthorne-card ul {
    list-style: none;
}

.hawthorne-card li {
    position: relative;
    padding-left: var(--space-md);
    margin-bottom: var(--space-xs);
}

.hawthorne-card li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* Legislation Timeline */
.legislation-timeline {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--space-lg);
}

.legislation-timeline h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
    color: var(--color-gold);
}

.timeline-items {
    display: flex;
    gap: var(--space-xl);
}

.timeline-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.timeline-item .year {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gold);
}

.timeline-item .event {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Strategic Grid */
.strategic-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.strategic-card {
    text-align: center;
    padding: var(--space-lg);
    border: 1px solid var(--color-light);
    transition: var(--transition-smooth);
}

.strategic-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-5px);
}

.card-icon {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
}

.strategic-card h4 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.strategic-card p {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--color-text-light);
}

.chart-row {
    display: flex;
    justify-content: center;
}

/* Tech Grid */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.tech-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-light);
    border-radius: 4px;
}

.tech-icon {
    font-size: 1.5rem;
}

.tech-name {
    font-weight: 500;
    color: var(--color-primary);
}

/* Timeline Visual */
.timeline-visual {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.timeline-image {
    width: 100%;
    max-width: 1000px;
}

.timeline-image img {
    width: 100%;
    height: auto;
    display: block;
}

.timeline-fallback {
    padding: var(--space-xl);
}

.timeline-track {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    padding: var(--space-xl) 0;
}

.timeline-track::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-gold));
    transform: translateY(-50%);
}

.timeline-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-white);
    padding: var(--space-sm);
    z-index: 1;
}

.node-year {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.node-label {
    font-size: 0.75rem;
    text-align: center;
    color: var(--color-text-light);
    max-width: 100px;
}

/* Comparison Grid */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.comparison-col {
    padding: var(--space-lg);
}

.comparison-col.traditional {
    background: #f5f5f5;
    border-left: 4px solid #999;
}

.comparison-col.modern {
    background: var(--color-light);
    border-left: 4px solid var(--color-accent);
}

.comparison-col h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: var(--space-lg);
    color: var(--color-primary);
}

.comparison-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

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

.comparison-item .check {
    font-weight: 700;
    font-size: 1.25rem;
}

.traditional .check {
    color: #999;
}

.modern .check {
    color: var(--color-accent);
}

.transformation-image {
    text-align: center;
}

.transformation-image img {
    max-width: 100%;
    max-height: 200px;
}

/* Impact Grid */
.impact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.impact-card {
    padding: var(--space-lg);
    border: 1px solid var(--color-light);
    position: relative;
    transition: var(--transition-smooth);
}

.impact-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(123, 104, 238, 0.1);
}

.impact-number {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-light);
    line-height: 1;
}

.impact-card h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
    margin-top: var(--space-lg);
}

.impact-card p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-text-light);
}

/* Conclusion Slide */
.conclusion {
    background: var(--color-primary);
    color: var(--color-white);
}

.conclusion .title-decoration .line {
    background: var(--color-gold);
}

.conclusion .era-badge {
    border-color: var(--color-gold);
    color: var(--color-gold);
}

.conclusion-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-white);
    margin-bottom: var(--space-xl);
}

.conclusion-content {
    max-width: 900px;
}

.conclusion-text {
    font-size: 1.25rem;
    line-height: 1.7;
    margin-bottom: var(--space-xl);
    opacity: 0.9;
}

.key-takeaways {
    margin-bottom: var(--space-xl);
}

.key-takeaways h4 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--color-gold);
    margin-bottom: var(--space-lg);
}

.takeaway-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.takeaway {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
}

.takeaway-num {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1;
}

.takeaway p {
    font-size: 0.95rem;
    line-height: 1.5;
    opacity: 0.9;
}

.final-quote {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255,255,255,0.2);
}

.final-quote blockquote {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-style: italic;
    color: var(--color-gold);
    line-height: 1.5;
}

/* Navigation Controls */
.nav-controls {
    position: fixed;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--space-md);
    z-index: 100;
}

.nav-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid var(--color-primary);
    background: var(--color-white);
    color: var(--color-primary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-btn:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: scale(1.1);
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
}

/* Responsive */
@media (max-width: 1024px) {
    .content-grid.two-col {
        grid-template-columns: 1fr;
    }
    
    .strategic-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .takeaway-grid {
        grid-template-columns: 1fr;
    }
    
    .hawthorne-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline-items {
        flex-direction: column;
        gap: var(--space-md);
    }
}

@media (max-width: 768px) {
    .slide {
        padding: var(--space-md);
    }
    
    .slide-content {
        max-height: none;
    }
    
    .section-number {
        font-size: 2rem;
    }
    
    .stat-card {
        min-width: 150px;
        padding: var(--space-md);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .impact-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
    }
}

/* References Slide */
.references-content {
    flex: 1;
    overflow-y: auto;
    padding-right: var(--space-md);
}

.reference-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.reference-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-light);
    border-left: 3px solid var(--color-accent);
}

.ref-num {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-accent);
    min-width: 30px;
}

.reference-item p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-text);
    margin: 0;
}

.reference-item em {
    font-style: italic;
    color: var(--color-primary);
}

/* Print Styles */
@media print {
    .nav-controls,
    .progress-bar,
    .slide-counter,
    .scroll-hint {
        display: none;
    }
    
    .slide {
        position: relative;
        opacity: 1;
        visibility: visible;
        page-break-after: always;
    }
}