/* ===== ENHANCED PORTFOLIO CSS - COHESIVE DESIGN ===== */
/* CSS CUSTOM PROPERTIES - COLOR SYSTEM */
:root {
    /* Primary Brand Colors */
    --primary-blue: #2563eb;
    --primary-teal: #0d9488;
    --primary-cyan: #0891b2;
    --primary-indigo: #4f46e5;
    
    /* Dark Theme Colors */
    --dark-bg-primary: #0f172a;
    --dark-bg-secondary: #1e293b;
    --dark-bg-tertiary: #334155;
    --dark-text-primary: #f1f5f9;
    --dark-text-secondary: #cbd5e1;
    --dark-border: rgba(255, 255, 255, 0.1);
    
    /* Light Theme Colors */
    --light-bg-primary: #ffffff;
    --light-bg-secondary: #f8fafc;
    --light-bg-tertiary: #e2e8f0;
    --light-text-primary: #1e293b;
    --light-text-secondary: #64748b;
    --light-border: rgba(0, 0, 0, 0.1);
    
    /* Accent Colors */
    --accent-gold: #f59e0b;
    --accent-red: #dc2626;
    --accent-green: #059669;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue), var(--primary-teal));
    --gradient-secondary: linear-gradient(135deg, var(--primary-cyan), var(--primary-indigo));
    --gradient-dark: linear-gradient(135deg, var(--dark-bg-primary), var(--dark-bg-secondary));
    --gradient-light: linear-gradient(135deg, var(--light-bg-primary), var(--light-bg-secondary));
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 8px 25px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.3);
    
    /* Animations */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== GLOBAL STYLES ===== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: "Poppins", sans-serif;
    background: var(--gradient-dark);
    color: var(--dark-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* GLOBAL ANIMATIONS */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===== ENHANCED HERO SECTION ===== */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 100vh;
    background: var(--gradient-dark);
    color: var(--dark-text-primary);
    padding: 0 24px;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.book-indicator.active {
    background: var(--primary-blue);
    transform: scale(1.2);
    box-shadow: var(--shadow-glow);
}

.book-indicator:hover {
    background: var(--primary-teal);
    transform: scale(1.1);
}

/* ===== ENHANCED POPUPS ===== */
.school-popup, .citation-popup, .book-popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.school-popup.show, .citation-popup.show, .book-popup.show {
    opacity: 1;
    visibility: visible;
}

.school-popup-content, .citation-popup-content, .book-popup-content {
    background: var(--light-bg-primary);
    padding: 50px;
    border-radius: 24px;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    margin: 20px;
    position: relative;
    transform: translateY(50px) scale(0.9);
    transition: all var(--transition-normal);
    font-family: "Merriweather", serif;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--light-border);
}

.citation-popup-content {
    background: var(--dark-bg-secondary);
    color: var(--dark-text-primary);
    border: 1px solid var(--dark-border);
}

.school-popup.show .school-popup-content, .citation-popup.show .citation-popup-content, .book-popup.show .book-popup-content {
    transform: translateY(0) scale(1);
}

.popup-close, .citation-popup-close, .book-popup-close {
    position: absolute;
    top: 20px;
    right: 25px;
    font-size: 32px;
    cursor: pointer;
    color: var(--light-text-secondary);
    transition: all var(--transition-fast);
    font-weight: bold;
    z-index: 1002;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.1);
}

.citation-popup-close {
    color: var(--dark-text-secondary);
    background: rgba(255,255,255,0.1);
}

.popup-close:hover, .citation-popup-close:hover, .book-popup-close:hover {
    color: var(--accent-red);
    background: rgba(220, 38, 38, 0.1);
    transform: scale(1.1);
}

/* Citation Popup Specific Styles */
.citation-popup-header {
    margin-bottom: 30px;
    padding-bottom: 25px;
    border-bottom: 2px solid var(--dark-border);
}

.citation-popup h3 {
    color: var(--dark-text-primary);
    margin-bottom: 15px;
    font-size: 1.5rem;
    font-weight: 700;
}

.citation-popup-year {
    display: inline-block;
    background: var(--gradient-secondary);
    color: white;
    padding: 8px 16px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.citation-full-text {
    background: rgba(37, 99, 235, 0.1);
    border-left: 5px solid var(--primary-blue);
    padding: 25px;
    margin: 25px 0;
    border-radius: 12px;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--dark-text-secondary);
    backdrop-filter: blur(10px);
}

.citation-details {
    margin: 25px 0;
}

.citation-detail-item {
    margin-bottom: 12px;
    font-size: 0.9rem;
    padding: 10px 0;
    border-bottom: 1px solid var(--dark-border);
}

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

.citation-detail-label {
    font-weight: 600;
    color: var(--primary-blue);
    display: inline-block;
    width: 100px;
}

.citation-detail-value {
    color: var(--dark-text-secondary);
}

.citation-tags-popup {
    margin: 25px 0;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.citation-tag-popup {
    background: rgba(37, 99, 235, 0.2);
    color: var(--primary-blue);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid rgba(37, 99, 235, 0.3);
    transition: all var(--transition-fast);
}

.citation-tag-popup:hover {
    background: var(--primary-blue);
    color: white;
    transform: scale(1.05);
}

.citation-popup-actions {
    display: flex;
    gap: 18px;
    margin-top: 35px;
    padding-top: 25px;
    border-top: 1px solid var(--dark-border);
}

.copy-btn, .goto-site-btn {
    border: none;
    padding: 14px 28px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-normal);
    flex: 1;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
}

.copy-btn {
    background: var(--gradient-secondary);
    color: white;
}

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

.copy-btn.copied {
    background: var(--accent-green);
}

.goto-site-btn {
    background: var(--gradient-primary);
    color: white;
}

.goto-site-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Book Popup Specific Styles */
.book-popup-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 16px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
}

.book-popup-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--light-text-primary);
    margin-bottom: 25px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.book-popup-text {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--light-text-primary);
    margin-bottom: 30px;
}

/* School Popup Specific Styles */
.school-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    background: var(--light-bg-primary);
    padding: 50px 60px;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    z-index: 100;
    transition: all var(--transition-slow);
    opacity: 0;
    border: 1px solid var(--light-border);
    backdrop-filter: blur(20px);
}

.school-popup.show {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.school-popup h3 {
    color: var(--light-text-primary);
    margin-bottom: 18px;
    font-size: 1.6rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.school-popup p {
    color: var(--light-text-secondary);
    line-height: 1.6;
    font-size: 1.05rem;
}

/* ===== ENHANCED DOWN INDICATOR ===== */
.down-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 28px;
    color: var(--dark-text-primary);
    opacity: 0.9;
    z-index: 3;
    cursor: pointer;
    transition: all var(--transition-normal);
    padding: 15px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(15px);
    animation: floating 2s ease-in-out infinite;
}

.down-indicator:hover {
    color: var(--primary-blue);
    transform: translateX(-50%) scale(1.2);
    background: rgba(37, 99, 235, 0.2);
    box-shadow: var(--shadow-glow);
}

/* ===== RESPONSIVE DESIGN ENHANCEMENTS ===== */
@media (max-width: 1024px) {
    .hero-container {
        flex-direction: column;
        gap: 60px;
        text-align: center;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-image {
        flex: none;
    }
    
    .hero-image-container {
        width: 250px;
        height: 250px;
    }
    
    .about-main-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .book-pages {
        gap: 35px;
        padding: 0 40px;
    }
    
    .book-page {
        flex: 0 0 300px;
        height: 380px;
    }
    
    .reaction-article {
        flex-direction: column;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 0 16px;
    }
    
    .hero .title {
        padding: 30px 35px;
    }
    
    .hero-image-container {
        width: 220px;
        height: 220px;
    }
    
    .school-card {
        flex: 0 0 200px;
    }
    
    .school-card img {
        width: 120px;
        height: 120px;
    }
    
    .references-content, .newspaper-section .content {
        padding: 40px 35px;
    }
    
    .citation-card {
        padding: 25px;
    }
    
    .citation-popup-content, .book-popup-content, .school-popup {
        padding: 30px;
        margin: 15px;
    }
    
    .book-pages {
        padding: 0 25px;
        gap: 30px;
    }
    
    .book-page {
        flex: 0 0 280px;
        height: 350px;
    }
    
    .book-page-image {
        height: 180px;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .book-title {
        font-size: 2.8rem;
    }
}

@media (max-width: 480px) {
    .hero .title {
        padding: 25px 30px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
        letter-spacing: 1px;
    }
    
    .book-title {
        font-size: 2.2rem;
    }
    
    .typewriter {
        font-size: 1.6rem;
    }
    
    .school-cards {
        gap: 20px;
    }
    
    .school-card {
        flex: 0 0 180px;
    }
    
    .citation-popup-actions {
        flex-direction: column;
    }
    
    .about-card {
        padding: 20px;
    }
}

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg-secondary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-teal);
}

/* ===== ACCESSIBILITY ENHANCEMENTS ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus states for accessibility */
button:focus, .citation-card:focus, .school-card:focus, .book-page:focus {
    outline: 3px solid var(--primary-blue);
    outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
/*
media @print {
    .hero, .book-section {
        background: white !important;
        color: black !important;
    }
}
    */
    
    .down-indicator, .book-nav-arrows, .book-scroll-indicators {
        display: none !important;
    }


.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    z-index: 1;
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    width: 100%;
    gap: 60px;
    position: relative;
    z-index: 2;
}

.hero-content {
    flex: 1;
    text-align: left;
    animation: slideInLeft 1s var(--transition-slow);
}

.hero .title {
    padding: 40px 48px;
    border-radius: 24px;
    backdrop-filter: blur(20px) saturate(120%);
    background: rgba(15,23,42,0.4);
    border: 1px solid var(--dark-border);
    box-shadow: var(--shadow-lg);
    position: relative;
    transition: all var(--transition-normal);
}

.hero .title:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.hero h1 {
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    margin: 0 0 16px 0;
}

.hero p.lead {
    margin-bottom: 24px;
    font-weight: 600;
    color: var(--dark-text-secondary);
    font-size: clamp(1.1rem, 2vw, 1.3rem);
}

.hero-quote {
    font-style: italic;
    color: var(--dark-text-secondary);
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    margin-top: 16px;
    min-height: 1.5em;
    opacity: 0.9;
}

/* Typewriter cursor effect */
.typewriter-cursor::after {
    content: '|';
    animation: blink 1s infinite;
    color: var(--primary-blue);
    font-weight: 300;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}


.hero-image {
    flex: 0 0 300px;
    position: relative;
    animation: slideInRight 1s var(--transition-slow);
}

.hero-image-container {
    width: 280px;
    height: 280px;
    position: relative;
    margin: 0 auto;
    animation: floating 3s ease-in-out infinite;
}

.hero-image-inner {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
    transition: all var(--transition-normal);
    border: 3px solid rgba(255, 255, 255, 0.2);
}

.hero-image-inner:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.hero-image-inner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    transition: filter var(--transition-normal);
}

.hero-image-inner:hover img {
    filter: brightness(1.1) contrast(1.1);
}


.newspaper-section {
    background: var(--gradient-light);
    padding: 100px 0;
    width: 100%;
    position: relative;
    transition: all var(--transition-normal);
}

.newspaper-section .content {
    width: 95%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 70px;
    background: var(--light-bg-primary);
    border-radius: 24px;
    box-shadow: var(--shadow-md);
    font-family: "Merriweather", serif;
    position: relative;
    border: 1px solid var(--light-border);
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(50px);
}

.newspaper-section .content.animate {
    opacity: 1;
    transform: translateY(0);
    animation: fadeInUp 1s var(--transition-slow);
}

.newspaper-section .content:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

.section-title {
    font-family: "Merriweather", serif;
    font-size: 3rem;
    margin-bottom: 50px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-transform: uppercase;
    letter-spacing: 3px;
    position: relative;
    display: inline-block;
    animation: fadeInScale 1s var(--transition-slow);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-primary);
    border-radius: 3px;
    transform: scaleX(0);
    transition: transform var(--transition-slow);
    transform-origin: left;
}

.section-title.animate::after {
    transform: scaleX(1);
}

.reaction-article {
    display: flex;
    flex-direction: row;
    gap: 60px;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--light-text-primary);
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s ease;
    text-align: justify;
}

.reaction-article.show {
    opacity: 1;
    transform: translateY(0);
}

.reaction-column {
    flex: 1;
}

.reaction-column p {
    margin-bottom: 24px;
    transition: all var(--transition-normal);
    position: relative;
}

.reaction-column p:hover {
    color: var(--primary-blue);
    transform: translateX(8px);
}

.reaction-column p:first-letter {
    float: left;
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    margin-right: 16px;
    margin-top: 8px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: "Merriweather", serif;
}


.about-block {
    min-height: auto;
    padding: 50px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    gap: 30px;
    opacity: 0;
    transform: translateY(50px);
    transition: all 1s ease;
}

.about-block.show {
    opacity: 1;
    transform: translateY(0);
}


.about-main-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    max-width: 1000px;
    margin: 40px 0;
    width: 100%;
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.about-intro {
    background: var(--gradient-glass);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    padding: 40px;
    border: 1px solid var(--light-border);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.about-intro:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.about-intro h3 {
    font-size: 1.8rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    font-weight: 600;
}

.about-intro p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--light-text-primary);
    margin-bottom: 16px;
}

/* About Sidebar */
.about-sidebar {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.about-card {
    background: var(--gradient-glass);
    backdrop-filter: blur(15px);
    border-radius: 16px;
    padding: 25px;
    border: 1px solid var(--light-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.about-card:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-md);
}

.about-card h4 {
    font-size: 1.2rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
    font-weight: 600;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.skill-tag {
    background: var(--gradient-primary);
    color: white;
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: default;
}

.skill-tag:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-sm);
}

.interest-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.interest-tag {
    background: var(--gradient-secondary);
    color: white;
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    cursor: default;
}

.interest-tag:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-sm);
}

.quote-card {
    text-align: center;
    font-style: italic;
    font-size: 1rem;
    color: var(--light-text-secondary);
    position: relative;
}

.quote-card::before {
    content: '"';
    font-size: 4rem;
    color: var(--primary-blue);
    opacity: 0.3;
    position: absolute;
    top: -20px;
    left: -10px;
}

.quote-card::after {
    content: '"';
    font-size: 4rem;
    color: var(--primary-blue);
    opacity: 0.3;
    position: absolute;
    bottom: -30px;
    right: -10px;
}


.typewriter {
    font-size: 2.2rem;
    font-weight: 600;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-height: 2.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
}


.school-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
    margin-top: 40px;
}

.school-card {
    flex: 0 0 240px;
    background: var(--gradient-glass);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    padding: 25px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--light-border);
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.school-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
    transform-origin: left;
}

.school-card:hover::before {
    transform: scaleX(1);
}

.school-card:hover {
    transform: translateY(-12px) scale(1.03);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.school-card img {
    width: 150px;
    height: 150px;
    object-fit: cover;
    margin-bottom: 20px;
    border-radius: 16px;
    transition: all var(--transition-normal);
    border: 2px solid var(--light-border);
}

.school-card:hover img {
    transform: scale(1.1);
    filter: brightness(1.1);
    border-color: var(--primary-blue);
}

.school-card h4 {
    color: var(--light-text-primary);
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: color var(--transition-normal);
    text-align: center;
}

.school-card:hover h4 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.school-card p {
    color: var(--light-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.references-section {
    background: var(--gradient-dark);
    padding: 100px 0;
    width: 100%;
    position: relative;
}

.references-content {
    width: 95%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 70px;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--dark-border);
    font-family: "Merriweather", serif;
    opacity: 0;
    transform: translateY(50px);
    transition: all 1s ease;
}

.references-content.animate {
    opacity: 1;
    transform: translateY(0);
}

.references-content .section-title {
    color: var(--dark-text-primary);
}

.citation-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    border-radius: 16px;
    padding: 35px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
    border-left: 5px solid var(--primary-blue);
    border: 1px solid var(--dark-border);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: left;
    position: relative;
    overflow: hidden;
}

.citation-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 4px;
    background: var(--gradient-primary);
    transform: scaleY(0);
    transition: transform var(--transition-normal);
    transform-origin: top;
}

.citation-card:hover::before {
    transform: scaleY(1);
}

.citation-card:hover {
    transform: translateX(12px) translateY(-8px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-left-color: var(--primary-teal);
}

.citation-authors {
    font-weight: 600;
    color: var(--dark-text-primary);
    margin-bottom: 12px;
    font-size: 1.1rem;
}

.citation-year {
    display: inline-block;
    background: var(--gradient-secondary);
    color: white;
    padding: 8px 16px;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 18px;
    box-shadow: var(--shadow-sm);
}

.citation-title {
    font-style: italic;
    color: var(--dark-text-secondary);
    margin-bottom: 12px;
    font-size: 1.05rem;
    line-height: 1.5;
}

.citation-publication {
    color: var(--dark-text-secondary);
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.citation-doi {
    font-size: 0.85rem;
    color: var(--primary-cyan);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.citation-doi:hover {
    color: var(--primary-blue);
    text-decoration: underline;
}

.citation-tags {
    margin-top: 18px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.citation-tag {
    background: rgba(37, 99, 235, 0.2);
    color: var(--primary-blue);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid rgba(37, 99, 235, 0.3);
    transition: all var(--transition-fast);
}

.citation-tag:hover {
    background: var(--primary-blue);
    color: white;
    transform: scale(1.05);
}


.book-section {
    padding: 120px 0;
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
    width: 100%;
}

.book-container {
    position: relative;
    max-width: 100vw;
    margin: 0 auto;
    padding: 0 20px;
}

.book-title {
    text-align: center;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 3.5rem;
    margin-bottom: 80px;
    font-weight: bold;
    font-family: "Merriweather", serif;
    animation: fadeInScale 1s var(--transition-slow);
}

.book-scroll-area {
    position: relative;
    height: 480px;
    overflow: hidden;
    cursor: grab;
    border-radius: 24px;
}

.book-scroll-area:active {
    cursor: grabbing;
}

.book-pages {
    display: flex;
    gap: 50px;
    height: 100%;
    transition: transform var(--transition-normal);
    padding: 0 60px;
    width: max-content;
}

.book-page {
    flex: 0 0 340px;
    height: 420px;
    background: var(--light-bg-primary);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    border: 1px solid var(--light-border);
}

.book-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
    transform-origin: left;
    z-index: 1;
}

.book-page:hover::before {
    transform: scaleX(1);
}

.book-page:hover {
    transform: translateY(-20px) scale(1.05);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.book-page-image {
    width: 100%;
    height: 240px;
    object-fit: cover;
    transition: all var(--transition-normal);
    display: block;
}

.book-page:hover .book-page-image {
    filter: brightness(1.1) contrast(1.1);
}

.book-page-content {
    padding: 30px;
    height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.book-page-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--light-text-primary);
    margin-bottom: 12px;
    font-family: "Merriweather", serif;
    transition: all var(--transition-fast);
}

.book-page:hover .book-page-title {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.book-page-snippet {
    font-size: 0.95rem;
    color: var(--light-text-secondary);
    line-height: 1.5;
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
}

.book-page-tag {
    background: var(--gradient-secondary);
    color: white;
    padding: 8px 16px;
    border-radius: 16px;
    font-size: 0.8rem;
    align-self: flex-start;
    margin-top: 12px;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.book-page:hover .book-page-tag {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}


.book-nav-arrows {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(15px);
    border: none;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 24px;
    color: var(--light-text-primary);
    transition: all var(--transition-normal);
    z-index: 10;
    box-shadow: var(--shadow-md);
}

.book-nav-arrows:hover {
    background: white;
    transform: translateY(-50%) scale(1.15);
    box-shadow: var(--shadow-lg);
    color: var(--primary-blue);
}

.book-nav-left {
    left: 20px;
}

.book-nav-right {
    right: 20px;
}

.book-scroll-indicators {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 50px;
}

.book-indicator {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    cursor: pointer;
    transition 
}