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

:root {
    --primary-color: #3a6ea5;
    --primary-dark: #004e98;
    --primary-light: #6a98c9;
    --accent-color: #ff6b6b;
    --text-dark: #333;
    --text-light: #f4f4f4;
    --gray-light: #f9f9f9;
    --gray-medium: #e0e0e0;
    --gray-dark: #757575;
    --section-padding: 5rem 0;
    --transition: all 0.3s ease;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 1rem;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-dark);
}

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

.nav-menu li {
    margin-left: 2rem;
}

.nav-menu a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-dark);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url('Jouliana-pic2.JPG');
    background-size: cover;
    background-position: center;
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 20px;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInDown 1s ease;
}

.hero h2 {
    font-size: 2rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    animation: fadeInDown 1s ease 0.2s;
    animation-fill-mode: both;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.4s;
    animation-fill-mode: both;
}

/* Section Styling */
section {
    padding: var(--section-padding);
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--primary-dark);
    position: relative;
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 4px;
    background-color: var(--accent-color);
}

/* About Section */
.about-section {
    background-color: #fff;
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.profile-image {
    flex: 1;
    min-width: 300px;
    animation: fadeInLeft 1s ease;
}

.profile-image img {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
    margin: 0 auto;
    display: block;
}

.profile-image img:hover {
    transform: scale(1.03);
}

.profile-text {
    flex: 1;
    min-width: 300px;
    animation: fadeInRight 1s ease;
}

.profile-text p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.languages {
    background-color: var(--gray-light);
    padding: 1.5rem;
    border-radius: 10px;
    margin-top: 2rem;
}

.languages h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--primary-dark);
}

.languages ul {
    list-style: none;
}

.languages li {
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.languages li span {
    font-weight: 600;
    margin-right: 5px;
    color: var(--primary-dark);
}

/* Education Section */
.education-section {
    background-color: var(--gray-light);
}

.timeline {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background-color: var(--primary-light);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
    animation: fadeInUp 0.8s ease;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: var(--accent-color);
    border-radius: 50%;
    top: 20px;
    z-index: 1;
}

.timeline-item:nth-child(even)::after {
    left: -10px;
}

.timeline-content {
    padding: 20px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.timeline-content h3 {
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--gray-dark);
    margin-bottom: 0.25rem;
}

.timeline-content .date {
    display: block;
    font-weight: 600;
    color: var(--accent-color);
    margin-top: 0.5rem;
}

/* Experience Section */
.experience-section {
    background-color: #fff;
}

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

.card {
    height: 200px;
    perspective: 1000px;
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.card:hover .card-inner {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 1.5rem;
}

.card-front {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
    color: white;
}

.card-back {
    background-color: var(--accent-color);
    color: white;
    transform: rotateY(180deg);
}

.card-front h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.card-back p {
    font-size: 1.2rem;
    font-weight: 500;
}

/* Certifications Section */
.certifications-section {
    background-color: var(--gray-light);
}

.cert-list {
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
}

.cert-list li {
    background-color: white;
    padding: 1.2rem 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    animation: fadeInLeft 0.8s ease;
    animation-fill-mode: both;
}

.cert-list li:nth-child(even) {
    animation: fadeInRight 0.8s ease;
}

.cert-list li:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.cert-list li span {
    font-weight: 600;
    color: var(--accent-color);
}

/* Teaching Section */
.teaching-section {
    background-color: #fff;
}

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

.teaching-item {
    text-align: center;
    padding: 2rem;
    border-radius: 10px;
    background-color: var(--gray-light);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.teaching-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.teaching-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.teaching-item h3 {
    font-size: 1.3rem;
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.teaching-item p {
    color: var(--gray-dark);
    margin-bottom: 1rem;
}

.teaching-item span {
    font-weight: 600;
    color: var(--accent-color);
}

/* Community Service Section */
.community-section {
    background-color: var(--gray-light);
}

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

.community-item {
    background-color: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.community-item:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

.community-item p {
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.community-item span {
    color: var(--accent-color);
    font-weight: 600;
}

/* Research Section */
.research-section {
    background-color: #fff;
}

.research-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.research-item {
    position: relative;
    padding: 2rem;
    background-color: var(--gray-light);
    border-radius: 10px;
    margin-bottom: 2rem;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.research-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.research-item h3 {
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.research-item span {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background-color: var(--primary-light);
    color: white;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.research-item p {
    margin-bottom: 0.5rem;
}

.research-item strong {
    color: var(--primary-dark);
}

/* Publications Section */
.publications-section {
    background-color: var(--gray-light);
}

.publications-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.publication {
    background-color: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.publication:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.publication h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.publication p {
    color: var(--gray-dark);
    margin-bottom: 0.5rem;
}

.publication a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.publication a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Awards Section */
.awards-section {
    background-color: #fff;
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
}

.award {
    text-align: center;
    padding: 2rem;
    border-radius: 10px;
    background-color: var(--gray-light);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.award:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.award i {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.award h3 {
    font-size: 1.2rem;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.award span {
    color: var(--accent-color);
    font-weight: 600;
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--primary-dark), #1a3a5f);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.footer-section {
    flex: 1;
    min-width: 250px;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--accent-color);
    transform: translateY(-5px);
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive Styles */
@media (max-width: 992px) {
    .navbar {
        padding: 1rem;
    }
    
    .hero h1 {
        font-size: 2.8rem;
    }
    
    .hero h2 {
        font-size: 1.6rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .timeline::after {
        left: 40px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 80px;
        padding-right: 20px;
    }
    
    .timeline-item:nth-child(even) {
        left: 0;
    }
    
    .timeline-item::after {
        left: 30px;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
    }
    
    .hamburger {
        display: block;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        gap: 0;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 1rem 0;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero h2 {
        font-size: 1.4rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero h2 {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .profile-image img {
        max-width: 100%;
    }
}