/* ============================================================
   NAVY ACADEMIC DESIGN SYSTEM
   ============================================================ */

:root {
    --navy: #1F497D;
    --navy-dark: #16385C;
    --navy-tint: #eef3f8;
    --rule: #B4C3D2;
    --ink: #1b2733;
    --muted: #5b6b7a;
    --bg: #ffffff;
    --bg-alt: #f6f8fa;
    --gold: #b0810f;
    --radius: 10px;
    --shadow: 0 2px 10px rgba(20,56,92,.08), 0 8px 30px rgba(20,56,92,.06);
}

/* ============================================================
   GLOBAL STYLES
   ============================================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

/* SAFETY NET: Ensure images don't overflow and text wraps */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

p, li, a, .pub-item, .pub-content, .card-content, .quick-facts, .reference-card, .award-item, .award-details, .talk-item, .talk-details, .mentee-card, .funding-item, .teaching-content, .engagement-content {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* Additional wrap for long URLs and DOIs */
a {
    overflow-wrap: anywhere;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Fraunces', Georgia, serif;
    font-weight: 700;
    color: var(--navy);
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
    overflow-wrap: break-word;
    word-break: break-word;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
}

h2 {
    font-size: 2.2rem;
    font-weight: 700;
    position: relative;
    padding-bottom: 0.8rem;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--navy);
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

h4 {
    font-size: 1.1rem;
    font-weight: 600;
}

p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

a {
    color: var(--navy);
    text-decoration: none;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.7;
}

a:focus {
    outline: 2px solid var(--navy);
    outline-offset: 2px;
}

/* ============================================================
   CONTAINER & LAYOUT
   ============================================================ */

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 4rem 0;
    position: relative;
}

section:nth-child(odd) {
    background: var(--bg);
}

section:nth-child(even) {
    background: var(--bg-alt);
}

#navbar {
    background: var(--bg) !important;
}

/* ============================================================
   NAVBAR
   ============================================================ */

.navbar {
    position: sticky;
    top: 0;
    z-index: 999;
    background: var(--bg);
    box-shadow: var(--shadow);
    border-bottom: 1px solid var(--rule);
}

.navbar-container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.navbar-logo {
    font-family: 'Fraunces', Georgia, serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--navy);
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.35rem;
}

.nav-link {
    color: var(--ink);
    font-weight: 500;
    font-size: 0.9rem;
    position: relative;
    padding: 0.5rem 0;
    transition: color 0.3s;
    white-space: nowrap;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--navy);
    transition: width 0.3s;
}

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

.nav-link.active {
    color: var(--navy);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--navy);
    margin: 4px 0;
    transition: 0.3s;
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-7px, -7px);
}

/* ============================================================
   RESPONSIVE NAVBAR
   ============================================================ */

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
        gap: 1rem;
        z-index: 998;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link.active {
        color: var(--navy);
        border-bottom: 2px solid var(--navy);
        padding-bottom: 0.5rem;
    }
}

/* ============================================================
   HERO SECTION
   ============================================================ */

.hero {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--bg) 0%, var(--navy-tint) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-image {
    display: flex;
    justify-content: center;
    min-width: 0;
}

.profile-photo {
    width: 100%;
    max-width: 300px;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.hero-text {
    min-width: 0;
}

.hero-text h1 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--navy);
}

.hero-title {
    font-size: 1.2rem;
    color: var(--muted);
    margin-bottom: 1rem;
    font-weight: 500;
}

.hero-tagline {
    font-size: 1.05rem;
    color: var(--ink);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s;
    border: 2px solid var(--navy);
    cursor: pointer;
    text-decoration: none;
    overflow-wrap: break-word;
    word-break: break-word;
}

.btn-primary {
    background: var(--navy);
    color: white;
    border-color: var(--navy);
}

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

.btn-outline {
    background: transparent;
    color: var(--navy);
    border-color: var(--navy);
}

.btn-outline:hover {
    background: var(--navy-tint);
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(31, 73, 125, 0.3);
}

.quick-facts {
    background: rgba(255, 255, 255, 0.7);
    padding: 1.5rem;
    border-radius: var(--radius);
    border-left: 4px solid var(--navy);
    min-width: 0;
}

.quick-facts p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.quick-facts p:last-child {
    margin-bottom: 0;
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */

.about {
    background: var(--bg);
}

.about h2 {
    margin-bottom: 2rem;
}

.section-content {
    display: grid;
    gap: 2rem;
}

.section-content > p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--ink);
    min-width: 0;
}

.research-interests {
    margin-top: 2rem;
}

.research-interests h3 {
    margin-bottom: 1.5rem;
}

.interest-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tag {
    background: var(--navy-tint);
    color: var(--navy);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--rule);
    overflow-wrap: break-word;
}

/* ============================================================
   RESEARCH SECTION
   ============================================================ */

.research {
    background: var(--bg-alt);
}

.section-intro {
    font-size: 1.1rem;
    color: var(--muted);
    margin-bottom: 2.5rem;
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.research-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.research-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(31, 73, 125, 0.15);
}

.research-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.research-card img.contain {
    object-fit: contain;
    background: #fff;
    padding: 8px;
}

.card-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    min-width: 0;
}

.card-content h3 {
    margin-top: 0;
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.card-content p {
    font-size: 0.95rem;
    margin-bottom: 1rem;
    flex-grow: 1;
    min-width: 0;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.card-tags .tag {
    font-size: 0.8rem;
    padding: 0.35rem 0.75rem;
}

.card-link {
    color: var(--navy);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: gap 0.3s;
    overflow-wrap: anywhere;
    min-width: 0;
}

.card-link:hover {
    gap: 0.75rem;
}

.card-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
    min-width: 0;
}

.card-links a {
    font-weight: 600;
    font-size: 0.9rem;
    overflow-wrap: anywhere;
}

/* ============================================================
   PUBLICATIONS SECTION
   ============================================================ */

.publications {
    background: white;
}

.section-note {
    font-size: 0.95rem;
    color: var(--muted);
    margin-bottom: 2rem;
    font-style: italic;
}

.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.filter-btn {
    padding: 0.65rem 1.25rem;
    border: 2px solid var(--rule);
    background: white;
    color: var(--ink);
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s;
    overflow-wrap: break-word;
}

.filter-btn:hover {
    border-color: var(--navy);
    color: var(--navy);
}

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

.filter-btn:focus {
    outline: 2px solid var(--navy);
    outline-offset: 2px;
}

.publications-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.pub-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--rule);
    min-width: 0;
}

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

.pub-num {
    font-weight: 700;
    color: var(--navy);
    min-width: 2.5rem;
    text-align: right;
    padding-top: 0.1rem;
    flex-shrink: 0;
}

.pub-content {
    min-width: 0;
}

.pub-content p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    line-height: 1.7;
    min-width: 0;
}

.pub-content a {
    color: var(--navy);
    font-weight: 500;
    overflow-wrap: anywhere;
}

.status-badge {
    display: inline-block;
    background: var(--navy-tint);
    color: var(--navy);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

.badge {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

.badge-gold {
    background: #f4e7d8;
    color: var(--gold);
}

.pub-group {
    margin-bottom: 2.5rem;
}

.pub-group:last-child {
    margin-bottom: 0;
}

.pub-group-title {
    font-family: 'Fraunces', Georgia, serif;
    font-size: 1.25rem;
    color: var(--navy);
    margin: 0 0 1.2rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--rule);
}

/* ============================================================
   AWARDS & FUNDING SECTION
   ============================================================ */

.awards {
    background: var(--bg-alt);
}

.awards-subsection {
    margin-bottom: 3rem;
}

.awards-subsection:last-child {
    margin-bottom: 0;
}

.awards-subsection h3 {
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--rule);
    padding-bottom: 0.8rem;
}

.awards-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem 1.25rem;
}

.award-item {
    display: grid;
    grid-template-columns: 3.2rem 1fr;
    gap: 0.75rem;
    padding: 0.55rem 0.75rem;
    background: white;
    border-radius: 6px;
    border-left: 3px solid var(--navy);
    min-width: 0;
}

.award-year {
    font-weight: 700;
    color: var(--gold);
    font-size: 0.9rem;
    flex-shrink: 0;
    padding-top: 0.05rem;
}

.award-details {
    min-width: 0;
}

.award-details p {
    margin-bottom: 0.1rem;
    min-width: 0;
    line-height: 1.35;
}

.award-details p:first-child {
    font-weight: 600;
    color: var(--navy);
    font-size: 0.9rem;
}

.award-details p:last-child {
    font-size: 0.8rem;
    color: var(--muted);
    margin-bottom: 0;
}

.funding-list {
    display: grid;
    gap: 1.5rem;
}

.funding-item {
    background: white;
    padding: 1.25rem;
    border-radius: var(--radius);
    border-left: 4px solid var(--rule);
    min-width: 0;
}

.funding-item p {
    font-size: 0.95rem;
    margin-bottom: 0;
    min-width: 0;
}

.funding-item strong {
    color: var(--navy);
}

/* ============================================================
   EDUCATION & APPOINTMENTS (TIMELINE)
   ============================================================ */

.education {
    background: var(--bg-alt);
}

.appointments {
    background: var(--bg);
}

.timeline {
    display: grid;
    gap: 1.25rem;
    max-width: 900px;
}

.timeline-item {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 1.5rem;
    background: white;
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius);
    border-left: 4px solid var(--navy);
    min-width: 0;
}

.appointments .timeline-item {
    background: var(--bg-alt);
}

.timeline-date {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gold);
    white-space: nowrap;
    padding-top: 0.15rem;
}

.timeline-body {
    min-width: 0;
}

.timeline-body h3 {
    font-size: 1.05rem;
    color: var(--navy);
    margin-bottom: 0.3rem;
}

.timeline-org {
    font-size: 0.95rem;
    color: var(--ink);
    margin-bottom: 0.25rem;
}

.timeline-meta {
    font-size: 0.9rem;
    color: var(--muted);
    margin-bottom: 0.2rem;
}

.timeline-meta:last-child {
    margin-bottom: 0;
}

.timeline-honor {
    display: inline-block;
    margin-left: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gold);
}

@media (max-width: 640px) {
    .timeline-item {
        grid-template-columns: 1fr;
        gap: 0.4rem;
    }
    .timeline-date {
        padding-top: 0;
    }
}

/* ============================================================
   TEACHING SECTION
   ============================================================ */

.teaching {
    background: white;
}

.teaching-subsection {
    margin-bottom: 3rem;
}

.teaching-subsection:last-child {
    margin-bottom: 0;
}

.teaching-subsection h3 {
    margin-bottom: 1.5rem;
}

.teaching-content {
    line-height: 1.8;
    min-width: 0;
}

.teaching-content h4 {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--navy);
}

.teaching-content h4:first-child {
    margin-top: 0;
}

.teaching-content p {
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    min-width: 0;
}

.teaching-content ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.teaching-content li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.mentees-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.mentee-card {
    background: var(--navy-tint);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--rule);
    transition: transform 0.3s, box-shadow 0.3s;
    min-width: 0;
}

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

.mentee-card p {
    margin-bottom: 0;
    font-weight: 600;
    min-width: 0;
    overflow-wrap: break-word;
}

.mentee-card a {
    color: var(--navy);
    text-decoration: underline;
    overflow-wrap: anywhere;
}

.mentee-card small {
    display: block;
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 0.5rem;
    font-weight: 400;
}

/* ============================================================
   SERVICE SECTION
   ============================================================ */

.service {
    background: var(--bg-alt);
}

.service-subsection {
    margin-bottom: 3rem;
}

.service-subsection:last-child {
    margin-bottom: 0;
}

.service-subsection h3 {
    margin-bottom: 1.5rem;
}

.reviewer-content {
    min-width: 0;
}

.reviewer-content h4 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    color: var(--navy);
}

.reviewer-content h4:first-child {
    margin-top: 0;
}

.reviewer-content ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.reviewer-content li {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.engagement-content {
    min-width: 0;
}

.engagement-content ul {
    margin-left: 1.5rem;
}

.engagement-content li {
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.upcoming-badge {
    display: inline-block;
    background: var(--navy-tint);
    color: var(--navy);
    padding: 0.2rem 0.6rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

/* ============================================================
   TALKS SECTION
   ============================================================ */

.talks {
    background: white;
}

.talks-subsection {
    margin-bottom: 2.5rem;
}

.talks-subsection:last-child {
    margin-bottom: 0;
}

.talks-subsection h3 {
    margin-bottom: 1.5rem;
}

.talks-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.talk-item {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--rule);
    min-width: 0;
}

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

.talk-year {
    font-weight: 700;
    color: var(--navy);
    font-size: 0.95rem;
    flex-shrink: 0;
}

.talk-details {
    min-width: 0;
}

.talk-details p {
    margin-bottom: 0.3rem;
    font-size: 0.95rem;
    min-width: 0;
}

.talk-details strong {
    color: var(--navy);
}

.talk-details em {
    font-style: italic;
    color: var(--ink);
}

/* ============================================================
   SKILLS SECTION
   ============================================================ */

.skills {
    background: var(--bg-alt);
}

.skills-group {
    margin-bottom: 2rem;
}

.skills-group h3 {
    margin-bottom: 1rem;
}

.skills-group p {
    margin-bottom: 1rem;
    font-size: 0.95rem;
    min-width: 0;
}

.skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-chip {
    display: inline-block;
    background: white;
    color: var(--navy);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--rule);
    transition: all 0.3s;
    overflow-wrap: break-word;
}

.skill-chip:hover {
    background: var(--navy-tint);
    border-color: var(--navy);
}

/* ============================================================
   CONTACT SECTION
   ============================================================ */

.contact {
    background: white;
}

.contact-info {
    margin-bottom: 2rem;
    min-width: 0;
}

.contact-info p {
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    min-width: 0;
}

.contact-info a {
    color: var(--navy);
    font-weight: 500;
    overflow-wrap: anywhere;
}

.social-links {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border: 2px solid var(--navy);
    border-radius: 50%;
    color: var(--navy);
    font-size: 1.5rem;
    transition: all 0.3s;
    flex-shrink: 0;
}

.social-links a:hover {
    background: var(--navy);
    color: white;
}

.references-section h3 {
    margin-bottom: 2rem;
}

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

.reference-card {
    background: var(--navy-tint);
    padding: 1.5rem;
    border-radius: var(--radius);
    border-left: 4px solid var(--navy);
    min-width: 0;
}

.reference-card h4 {
    margin-top: 0;
    margin-bottom: 0.8rem;
    color: var(--navy);
}

.reference-card p {
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
    line-height: 1.6;
    min-width: 0;
}

.reference-card p:last-child {
    margin-bottom: 0;
}

.reference-card a {
    color: var(--navy);
    font-weight: 500;
    overflow-wrap: anywhere;
}

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
    background: var(--navy-dark);
    color: white;
    text-align: center;
    padding: 2rem;
    font-size: 0.9rem;
}

/* ============================================================
   BACK TO TOP BUTTON
   ============================================================ */

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--navy);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    z-index: 997;
}

.back-to-top:hover {
    background: var(--navy-dark);
    transform: translateY(-3px);
}

.back-to-top.show {
    display: flex;
}

.back-to-top:focus {
    outline: 2px solid white;
    outline-offset: 2px;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

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

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 1.8rem;
    }

    h3 {
        font-size: 1.3rem;
    }

    section {
        padding: 3rem 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-image {
        order: -1;
    }

    .profile-photo {
        max-width: 250px;
    }

    .research-grid {
        grid-template-columns: 1fr;
    }

    .filter-tabs {
        justify-content: center;
    }

    .award-item {
        grid-template-columns: 70px 1fr;
        gap: 1rem;
    }

    .award-year {
        font-size: 0.95rem;
    }

    .talk-item {
        grid-template-columns: 80px 1fr;
        gap: 1.5rem;
    }

    .references-grid {
        grid-template-columns: 1fr;
    }

    .social-links {
        justify-content: center;
    }

    .back-to-top {
        width: 45px;
        height: 45px;
        font-size: 1rem;
        bottom: 1.5rem;
        right: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    section {
        padding: 2rem 0;
    }

    .navbar-container {
        padding: 0 1rem;
    }

    .navbar-logo {
        font-size: 1rem;
    }

    .nav-menu {
        gap: 0;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        justify-content: center;
    }

    .quick-facts {
        padding: 1rem;
    }

    .interest-tags {
        gap: 0.5rem;
    }

    .tag {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }

    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }

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

    .pub-num {
        min-width: auto;
        text-align: left;
    }

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

    .award-year {
        flex-shrink: 0;
    }

    .mentees-grid {
        grid-template-columns: 1fr;
    }

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

    .talk-year {
        flex-shrink: 0;
    }
}

/* ============================================================
   PRINT STYLES
   ============================================================ */

@media print {
    .navbar,
    .back-to-top,
    .hamburger {
        display: none;
    }

    body {
        background: white;
        color: black;
        overflow-x: visible;
    }

    a {
        color: black;
        text-decoration: underline;
    }

    h1, h2, h3, h4, h5, h6 {
        color: black;
        page-break-after: avoid;
    }

    section {
        page-break-inside: avoid;
    }

    .research-card {
        page-break-inside: avoid;
    }

    .profile-photo {
        max-width: 200px;
    }
}

@media (max-width: 700px) {
    .awards-list { grid-template-columns: 1fr; }
}