:root {
    --primary-color: #166534;
    --accent-color: #15803d;
    --background-color: #0a1a0a;
    --text-color: #ffffff;
    --section-bg: #0f1a0f;
    --hover-color: #14532d;
    --footer-color: #0a1a0a;
    --card-bg: #0d1a0d;
    --border-color: #2d3748;
    --gradient-start: #166534;
    --gradient-end: #15803d;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, var(--background-color), #1a1a2e);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
}

header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: #fff;
    padding: 100px 20px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.3);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    pointer-events: none;
}

header h1 {
    font-size: 2.5em;
    margin: 0;
    letter-spacing: 2px;
}

header p {
    font-size: 1.2em;
    margin-top: 15px;
    opacity: 0.9;
}

/* Banner styles */
.banner {
    background: linear-gradient(135deg, #0a1a0a, #0f1a0f);
    color: #fff;
    padding: 40px 20px;
    position: relative;
    margin-bottom: 0;
    text-align: left;
    box-shadow: 0 8px 32px rgba(22, 101, 52, 0.3);
}

.banner-content {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
}

.home-link {
    font-size: 2em;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 1px;
    display: block;
    margin-bottom: 10px;
    transition: color 0.3s ease;
}

.home-link:hover {
    color: rgba(255, 255, 255, 0.9);
}

.banner p {
    font-size: 1.2em;
    margin: 10px 0 0;
    opacity: 0.9;
}

/* Navigation styles */
nav {
    background: rgba(10, 26, 10, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    margin: 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-name {
    color: white;
    font-size: 1.4em;
    font-weight: 500;
}

.nav-name a {
    color: white;
    text-decoration: none;
}

.nav-name a:hover {
    color: white;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: flex-end;
    flex-wrap: wrap;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 4px;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

nav ul li a i {
    margin-right: 6px;
}

nav ul li a:hover {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* Main content styles */
main {
    max-width: 100%;
    margin: 0;
    padding: 0;
}

.welcome {
    text-align: center;
    margin-bottom: 60px;
}

.home-section {
    margin: 0;
    padding: 40px 20px;
}

.home-section h2 {
    color: var(--text-color);
    margin-bottom: 30px;
    font-size: 1.8em;
    position: relative;
    padding-bottom: 10px;
    text-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.home-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: 2px;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
}

.news-preview {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

section {
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

section h2 {
    color: var(--text-color);
    margin-bottom: 40px;
    font-size: 2em;
    position: relative;
    padding-bottom: 15px;
    text-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: 2px;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
}

.publication, .outreach-item, .news-item {
    background: var(--card-bg);
    padding: 30px;
    margin: 30px auto;
    width: 80%;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border-radius: 16px;
    text-align: left;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.publication:hover, .outreach-item:hover, .news-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(99, 102, 241, 0.2);
    border-color: var(--gradient-start);
}

.news-item ul {
    list-style-type: none;
    padding: 0;
}

.news-item li {
    margin: 15px 0;
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
    border-radius: 8px;
}

.news-item li:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border-color: var(--gradient-start);
}

#contact {
    background-color: var(--background-color);
    padding: 60px 20px;
}

#contact p {
    font-size: 1.1em;
    margin: 20px 0;
}

footer {
    background: var(--footer-color);
    color: #fff;
    padding: 30px;
    position: relative;
}

.profile-container {
    display: flex;
    flex-direction: row;
    gap: 20px;
    margin: 0;
    padding: 40px 20px;
    background-color: #1e3d33;
}

.text-content {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-left: 0;
}

.research-interests {
    font-size: 1.1em;
    color: white;
    margin: 0;
    line-height: 1.6;
    text-align: left;
    max-width: 600px;
    margin-bottom: 20px;
}

.academic-links {
    display: flex;
    flex-direction: row;
    gap: 20px;
    align-items: flex-start;
    margin-top: 5px;
}

.academic-link {
    color: white;
    text-decoration: none;
    font-size: 1.1em;
    text-align: left;
    white-space: nowrap;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    padding: 10px 20px;
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.academic-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
    background: linear-gradient(135deg, var(--hover-color), var(--gradient-end));
    text-decoration: none;
}

.profile-image {
    border-radius: 0 !important;
    margin: 0;
    padding: 0;
    box-shadow: none;
    width: 300px !important;
    height: 375px !important;
    border: none;
    transition: transform 0.3s ease;
    display: block;
    object-fit: cover;
    object-position: center;
}

/* Responsive design */
@media (max-width: 768px) {
    /* Navigation improvements */
    .nav-container {
        flex-direction: column;
        gap: 15px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    
    nav ul li {
        margin: 5px 8px;
    }
    
    nav ul li a {
        padding: 6px 10px;
        font-size: 0.9em;
    }
    
    /* Profile section mobile layout */
    .profile-container {
        flex-direction: column;
        text-align: center;
        padding: 20px 15px;
    }
    
    .profile-image {
        width: 250px !important;
        height: 300px !important;
        margin: 0 auto 20px auto;
    }
    
    .text-content {
        margin-left: 0;
        align-items: center;
    }
    
    .research-interests {
        font-size: 1em;
        text-align: center;
        max-width: 100%;
        margin-bottom: 20px;
    }
    
    .academic-links {
        flex-direction: column;
        gap: 15px;
        align-items: center;
    }
    
    .academic-link {
        font-size: 1em;
        padding: 12px 20px;
        text-align: center;
        width: fit-content;
    }
    
    /* Section improvements */
    .home-section {
        padding: 30px 15px;
    }
    
    .home-section h2 {
        font-size: 1.5em;
        text-align: center;
    }
    
    .publication, .outreach-item, .news-item {
        width: 95%;
        padding: 20px 15px;
        margin: 20px auto;
    }
    
    .news-preview {
        padding: 20px 15px;
    }
    
    .contact-info {
        padding: 20px 15px;
    }
    
    /* Banner improvements */
    .banner {
        padding: 30px 15px;
        text-align: center;
    }
    
    .home-link {
        font-size: 1.6em;
    }
    
    .banner p {
        font-size: 1em;
    }
    
    /* Header improvements */
    header {
        padding: 60px 15px;
        text-align: center;
    }
    
    header h1 {
        font-size: 2em;
    }
    
    /* Button improvements */
    .button {
        padding: 10px 20px;
        font-size: 0.9em;
        display: block;
        text-align: center;
        margin: 10px auto;
        width: fit-content;
    }
    
    /* Publication list improvements */
    .publication-list p {
        font-size: 0.9em;
        line-height: 1.5;
        margin: 15px 0;
    }
    
    .publication-link {
        word-break: break-word;
    }
}

/* Extra small mobile devices */
@media (max-width: 480px) {
    .nav-container {
        padding: 0 10px;
    }
    
    nav ul li {
        margin: 3px 5px;
    }
    
    nav ul li a {
        padding: 5px 8px;
        font-size: 0.8em;
    }
    
    .profile-image {
        width: 200px !important;
        height: 250px !important;
    }
    
    .research-interests {
        font-size: 0.9em;
        padding: 0 10px;
    }
    
    .academic-link {
        font-size: 0.9em;
        padding: 10px 15px;
    }
    
    .home-section {
        padding: 20px 10px;
    }
    
    .home-section h2 {
        font-size: 1.3em;
    }
    
    .publication, .outreach-item, .news-item {
        width: 98%;
        padding: 15px 10px;
    }
    
    .banner {
        padding: 20px 10px;
    }
    
    .home-link {
        font-size: 1.4em;
    }
    
    header {
        padding: 40px 10px;
    }
    
    header h1 {
        font-size: 1.8em;
    }
    
    .publication-list p {
        font-size: 0.8em;
    }
}

/* iPhone specific optimizations */
@media (max-width: 414px) {
    /* iPhone 11 Pro Max, iPhone XS Max */
    .profile-container {
        padding: 15px 10px;
    }
    
    .profile-image {
        width: 180px !important;
        height: 220px !important;
    }
    
    .research-interests {
        font-size: 0.85em;
        line-height: 1.5;
        padding: 0 5px;
    }
    
    .academic-links {
        gap: 10px;
    }
    
    .academic-link, .button {
        font-size: 0.85em;
        padding: 8px 12px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .home-section {
        padding: 15px 8px;
    }
    
    .home-section h2 {
        font-size: 1.2em;
        margin-bottom: 20px;
    }
    
    .publication, .outreach-item, .news-item {
        width: 100%;
        padding: 12px 8px;
        margin: 15px 0;
    }
    
    .news-preview {
        padding: 15px 8px;
    }
    
    .contact-info {
        padding: 15px 8px;
    }
    
    .nav-container {
        padding: 0 8px;
    }
    
    nav ul li a {
        padding: 8px 6px;
        font-size: 0.75em;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .banner {
        padding: 15px 8px;
    }
    
    .home-link {
        font-size: 1.3em;
    }
    
    .banner p {
        font-size: 0.9em;
    }
}

@media (max-width: 375px) {
    /* iPhone X, iPhone 8 Plus, iPhone 7 Plus */
    .profile-image {
        width: 160px !important;
        height: 200px !important;
    }
    
    .research-interests {
        font-size: 0.8em;
        line-height: 1.4;
    }
    
    .academic-link, .button {
        font-size: 0.8em;
        padding: 6px 10px;
    }
    
    .home-section h2 {
        font-size: 1.1em;
    }
    
    nav ul li a {
        font-size: 0.7em;
        padding: 6px 4px;
    }
    
    .home-link {
        font-size: 1.2em;
    }
}

@media (max-width: 320px) {
    /* iPhone SE, iPhone 5s */
    .profile-image {
        width: 140px !important;
        height: 175px !important;
    }
    
    .research-interests {
        font-size: 0.75em;
        line-height: 1.3;
    }
    
    .academic-link, .button {
        font-size: 0.75em;
        padding: 5px 8px;
    }
    
    .home-section h2 {
        font-size: 1em;
    }
    
    nav ul li a {
        font-size: 0.65em;
        padding: 5px 3px;
    }
    
    .home-link {
        font-size: 1.1em;
    }
    
    .publication-list p {
        font-size: 0.7em;
    }
}

/* iPhone landscape optimizations */
@media (max-width: 896px) and (orientation: landscape) {
    .profile-container {
        flex-direction: row;
        padding: 10px 15px;
    }
    
    .profile-image {
        width: 120px !important;
        height: 150px !important;
        margin-right: 15px;
        margin-bottom: 0;
    }
    
    .research-interests {
        font-size: 0.8em;
        text-align: left;
    }
    
    .academic-links {
        flex-direction: row;
        gap: 8px;
    }
    
    .academic-link, .button {
        font-size: 0.75em;
        padding: 6px 10px;
    }
}

/* Button styles */
.button {
    display: inline-block;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s ease;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    border: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
    background: linear-gradient(135deg, var(--hover-color), var(--gradient-end));
}

/* Link styles */
a {
    color: var(--gradient-start);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--gradient-end);
    text-shadow: 0 0 8px rgba(99, 102, 241, 0.5);
}

/* Profile section styles */
.links-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    justify-content: center;
}

.academic-link {
    display: inline-flex;
    align-items: center;
    padding: 5px 10px;
    text-decoration: none;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.academic-link i {
    margin-right: 8px;
}

.academic-link:hover {
    color: var(--accent-color);
}

.home-page .nav-home,
.about-page .nav-about,
.publications-page .nav-publications,
.projects-page .nav-projects,
.cv-page .nav-cv,
.outreach-page .nav-outreach,
.news-page .nav-news,
.contact-page .nav-contact {
    background-color: var(--hover-color);
}

.contact-info {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.contact-info p {
    margin: 15px 0;
    font-size: 1.1em;
}

.contact-info a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-info a:hover {
    color: var(--hover-color);
    text-decoration: underline;
}

.education-item, .experience-item {
    background: var(--card-bg);
    padding: 25px;
    margin-bottom: 20px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.education-item:hover, .experience-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(99, 102, 241, 0.15);
    border-color: var(--gradient-start);
}

.research-areas ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.research-areas li {
    background: var(--card-bg);
    padding: 12px 20px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    color: var(--text-color);
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.research-areas li:hover {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

.publication-card {
    background: var(--card-bg);
    padding: 25px;
    margin-bottom: 20px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    text-align: left;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.publication-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(99, 102, 241, 0.15);
    border-color: var(--gradient-start);
}

.publication-card h3 {
    color: var(--text-color);
    margin: 0 0 10px 0;
    text-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

.publication-meta {
    color: var(--gradient-start);
    font-weight: 500;
    margin: 5px 0 10px 0;
}