:root {
    --color-black: #000000;
    --color-white: #FFFFFF;
    --color-gray: #F5F5F5;
    --color-gray-dark: #666666;
    --color-accent: #0B132B;
    
    --font-display: 'Playfair Display', 'Libre Baskerville', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--color-white);
    color: var(--color-black);
    line-height: 1.7;
    overflow-x: hidden;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Page Transitions */
.page-transition {
    animation: fadeIn 0.8s ease-out;
}

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

/* Navigation */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    padding: 2rem 0;
    transition: var(--transition-fast);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--color-black);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.6;
}

.nav-links {
    display: flex;
    gap: 3rem;
    list-style: none;
}

.nav-links a {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-black);
    text-decoration: none;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-black);
    transition: var(--transition-fast);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a:hover {
    opacity: 1;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 12rem 4rem 6rem;
    background: var(--color-white);
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.hero-content {
    max-width: 900px;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.3s forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.greeting {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-gray-dark);
    margin-bottom: 2rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.name {
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 400;
    color: var(--color-black);
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.tribal-affiliation {
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-gray-dark);
    margin-bottom: 3rem;
    letter-spacing: 0.05em;
}

.intro-lead {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-black);
    margin-bottom: 2rem;
    font-weight: 300;
}

.intro-body {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-gray-dark);
    margin-bottom: 2rem;
}

.future-position {
    font-size: 1rem;
    color: var(--color-gray-dark);
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    line-height: 1.6;
}

.highlight {
    color: var(--color-black);
    font-weight: 500;
}

.inline-link {
    color: var(--color-black);
    text-decoration: none;
    border-bottom: 1px solid var(--color-black);
    transition: var(--transition-fast);
}

.inline-link:hover {
    opacity: 0.5;
}

.hero-image {
    display: none;
}

/* Books Section */
.books-section {
    padding: 8rem 4rem;
    background: var(--color-gray);
}

.books-container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 400;
    color: var(--color-black);
    margin-bottom: 4rem;
    letter-spacing: -0.02em;
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
}

.book-card {
    background: var(--color-white);
    padding: 3rem;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.book-badge {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gray-dark);
    margin-bottom: 1.5rem;
    display: block;
}

.book-card h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 400;
    line-height: 1.3;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.book-card-authors {
    font-size: 1rem;
    color: var(--color-gray-dark);
    margin-bottom: 0.5rem;
}

.book-card-publisher {
    font-size: 0.9rem;
    color: var(--color-gray-dark);
    margin-bottom: 2rem;
}

.btn-primary {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--color-black);
    color: var(--color-white);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    border: none;
    transition: var(--transition-fast);
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--color-gray-dark);
}

/* Quick Links */
.quick-links {
    padding: 8rem 4rem;
    background: var(--color-white);
}

.section-container {
    max-width: 1400px;
    margin: 0 auto;
}

.quick-links-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.quick-link-card {
    padding: 3rem 2rem;
    text-decoration: none;
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    background: var(--color-white);
}

.quick-link-card:hover {
    border-color: var(--color-black);
    transform: translateY(-4px);
}

.quick-link-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: block;
}

.quick-link-card h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--color-black);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.quick-link-card p {
    font-size: 0.95rem;
    color: var(--color-gray-dark);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.quick-link-arrow {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-black);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* About Section */
.about {
    padding: 8rem 4rem;
    background: var(--color-gray);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-black);
    margin-bottom: 2rem;
}

.credentials {
    margin-top: 4rem;
    padding-top: 4rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    display: grid;
    gap: 2rem;
}

.credential-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2rem;
}

.credential-label {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gray-dark);
}

.credential-value {
    font-size: 1.05rem;
    color: var(--color-black);
    line-height: 1.6;
}

/* Page Headers */
.page-header {
    padding: 12rem 4rem 6rem;
    background: var(--color-white);
}

.page-title {
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 400;
    color: var(--color-black);
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.2s forwards;
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--color-gray-dark);
    max-width: 700px;
    line-height: 1.7;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.4s forwards;
}

.scholar-stats {
    display: flex;
    gap: 4rem;
    margin-top: 3rem;
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.6s forwards;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 400;
    color: var(--color-black);
}

.stat-label {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gray-dark);
    margin-top: 0.5rem;
}

/* Publications Section */
.publications-page {
    padding: 4rem 4rem 8rem;
    background: var(--color-white);
}

.pub-controls {
    margin-bottom: 3rem;
}

.search-box {
    position: relative;
    margin-bottom: 2rem;
}

.search-box input {
    width: 100%;
    padding: 1rem 3rem 1rem 1.5rem;
    font-family: var(--font-body);
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    background: white;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(67, 56, 202, 0.1);
}

.search-icon {
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
    pointer-events: none;
    opacity: 0.5;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.filter-btn {
    padding: 0.7rem 1.5rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    background: white;
    color: var(--color-text);
    border: 2px solid var(--color-border);
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.pub-category {
    margin-bottom: 6rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

.pub-category.hidden {
    display: none;
}

.pub-category:nth-child(2) { animation-delay: 0.1s; }
.pub-category:nth-child(3) { animation-delay: 0.2s; }
.pub-category:nth-child(4) { animation-delay: 0.3s; }

.pub-category-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 400;
    color: var(--color-black);
    margin-bottom: 3rem;
    letter-spacing: -0.01em;
}

.publications-list,
.publications-list-inner {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.publication-item {
    padding: 2rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition-fast);
}

.publication-item:hover {
    padding-left: 1rem;
}

.pub-citation {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-black);
    margin-bottom: 1rem;
}

.pub-citation em {
    font-style: italic;
}

.pub-award {
    font-size: 0.9rem;
    color: var(--color-gray-dark);
    margin-bottom: 1rem;
}

.pub-link {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-black);
    text-decoration: none;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--color-black);
    transition: var(--transition-fast);
}

.pub-link:hover {
    opacity: 0.5;
}

.view-all-link {
    text-align: center;
    margin-top: 4rem;
}

.btn-secondary {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: transparent;
    color: var(--color-black);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    text-decoration: none;
    border: 1px solid var(--color-black);
    transition: var(--transition-fast);
}

.btn-secondary:hover {
    background: var(--color-black);
    color: var(--color-white);
}

/* Speaking Section */
.speaking-page {
    padding: 4rem 4rem 8rem;
    background: var(--color-white);
}

.speaking-category {
    margin-bottom: 6rem;
}

.speaking-category-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 400;
    color: var(--color-black);
    margin-bottom: 3rem;
    letter-spacing: -0.01em;
}

.presentations-list,
.presentations-list-inner {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.presentation-item {
    padding: 2rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition-fast);
}

.presentation-item:hover {
    padding-left: 1rem;
}

.presentation-date {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gray-dark);
    margin-bottom: 1rem;
}

.presentation-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 400;
    color: var(--color-black);
    line-height: 1.3;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.presentation-venue {
    font-size: 1rem;
    color: var(--color-gray-dark);
    margin-bottom: 0.5rem;
}

.presentation-coauthors {
    font-size: 0.95rem;
    color: var(--color-gray-dark);
    font-style: italic;
    margin-bottom: 1rem;
}

.presentation-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-black);
    color: var(--color-white);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-top: 1rem;
}

.speaking-cta,
.media-cta {
    background: var(--color-gray);
    padding: 4rem;
    text-align: center;
    margin-top: 6rem;
}

.speaking-cta h3,
.media-cta h3 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--color-black);
    margin-bottom: 1.5rem;
    letter-spacing: -0.01em;
}

.speaking-cta p,
.media-cta p {
    font-size: 1.1rem;
    color: var(--color-gray-dark);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

/* Media Section */
.media-page {
    padding: 4rem 4rem 8rem;
    background: var(--color-white);
}

.media-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.media-card {
    padding: 2rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    background: var(--color-white);
}

.media-card:hover {
    border-color: var(--color-black);
    transform: translateY(-4px);
}

.media-type {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gray-dark);
    margin-bottom: 1.5rem;
}

.media-title {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 400;
    color: var(--color-black);
    line-height: 1.4;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.media-source {
    font-size: 0.95rem;
    color: var(--color-gray-dark);
    margin-bottom: 0.5rem;
}

.media-author {
    font-size: 0.9rem;
    color: var(--color-gray-dark);
    font-style: italic;
    margin-bottom: 0.5rem;
}

.media-award {
    font-size: 0.9rem;
    color: var(--color-black);
    margin-bottom: 1rem;
    font-weight: 500;
}

.media-link {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-black);
    text-decoration: none;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--color-black);
    transition: var(--transition-fast);
}

.media-link:hover {
    opacity: 0.5;
}

/* Projects Section */
.projects-page {
    padding: 4rem 4rem 8rem;
    background: var(--color-white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.project-card {
    padding: 3rem;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    background: var(--color-white);
}

.project-card:hover {
    border-color: var(--color-black);
    transform: translateY(-4px);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.project-status {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.5rem 1rem;
    background: var(--color-gray);
    color: var(--color-gray-dark);
}

.project-status.active {
    background: var(--color-black);
    color: var(--color-white);
}

.project-date {
    font-size: 0.85rem;
    color: var(--color-gray-dark);
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 400;
    color: var(--color-black);
    line-height: 1.3;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.project-role {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-gray-dark);
    margin-bottom: 1.5rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.project-description {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-black);
    margin-bottom: 1.5rem;
}

.project-funding {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-black);
    margin-bottom: 0.5rem;
}

.project-funder,
.project-partners {
    font-size: 0.95rem;
    color: var(--color-gray-dark);
    margin-bottom: 0.5rem;
}

.project-link {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-black);
    text-decoration: none;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--color-black);
    transition: var(--transition-fast);
    display: inline-block;
    margin-top: 1rem;
}

.project-link:hover {
    opacity: 0.5;
}

/* Contact Section */
.contact {
    padding: 8rem 4rem;
    background: var(--color-gray);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.contact-item h4 {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-gray-dark);
    margin-bottom: 1rem;
}

.contact-item a {
    font-size: 1.1rem;
    color: var(--color-black);
    text-decoration: none;
    border-bottom: 1px solid var(--color-black);
    transition: var(--transition-fast);
}

.contact-item a:hover {
    opacity: 0.5;
}

.contact-item p {
    font-size: 1.05rem;
    color: var(--color-black);
    line-height: 1.7;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-link {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-black);
    text-decoration: none;
    padding: 1.5rem;
    background: var(--color-white);
    border: 1px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition-fast);
    display: block;
}

.contact-link:hover {
    border-color: var(--color-black);
    transform: translateX(8px);
}

/* Footer */
.footer {
    padding: 3rem 4rem;
    background: var(--color-black);
    color: rgba(255, 255, 255, 0.6);
    text-align: center;
}

.footer p {
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .nav-container {
        padding: 0 2rem;
    }

    .hero {
        padding: 10rem 2rem 4rem;
    }

    .name {
        font-size: 3.5rem;
    }

    .page-title {
        font-size: 3.5rem;
    }

    .books-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .quick-links-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .media-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1.5rem;
        padding: 0 1.5rem;
    }

    .nav-links {
        gap: 2rem;
        font-size: 0.85rem;
    }

    .hero {
        padding: 8rem 1.5rem 3rem;
    }

    .name {
        font-size: 2.5rem;
    }

    .page-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2.5rem;
    }

    .quick-links-grid,
    .media-grid {
        grid-template-columns: 1fr;
    }

    .credential-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .scholar-stats {
        gap: 2rem;
    }

    .books-section,
    .quick-links,
    .about,
    .contact,
    .publications-page,
    .speaking-page,
    .media-page,
    .projects-page {
        padding: 4rem 1.5rem;
    }

    .page-header {
        padding: 8rem 1.5rem 4rem;
    }
}

@media (max-width: 480px) {
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }

    .name {
        font-size: 2rem;
    }

    .page-title {
        font-size: 2rem;
    }

    .scholar-stats {
        flex-direction: column;
        gap: 2rem;
    }
}