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

:root {
    /* Light mode colors (existing colors) */
    --bg-primary: #f5f5f5;
    --bg-secondary: #fff;
    --bg-tertiary: #f8f9fa;
    --text-primary: #333;
    --text-secondary: #555;
    --text-tertiary: #666;
    --border-color: #e0e0e0;
    --link-color: #2563eb;
    --button-bg: #333;
    --button-hover: #555;
    --navbar-bg: #ffffffe6;
}

[data-theme="dark"] {
    /* Dark mode colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #e0e0e0;
    --text-secondary: #c0c0c0;
    --text-tertiary: #a0a0a0;
    --border-color: #404040;
    --link-color: #60a5fa;
    --button-bg: #4a4a4a;
    --button-hover: #5a5a5a;
    --navbar-bg: #2d2d2de6;
}

html {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    width: 100%;
    box-sizing: border-box;
    position: relative;
}

body {
    height: 100%;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    position: relative;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Container */
.container {
    width: 100%;
    min-height: 100vh;
    padding: 0;
    overflow-x: hidden;
    max-width: 100%;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--navbar-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 8px clamp(15px, 2.5vw, 20px);
    box-sizing: border-box;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 800px;
}

/* Theme Toggle Button */
.theme-toggle {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border: none;
    background-color: transparent;
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    padding: 0;
    box-sizing: border-box;
    flex-shrink: 0;
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--text-primary);
    outline-offset: 2px;
}

.theme-icon {
    width: 1.2rem;
    height: 1.2rem;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.moon-icon {
    position: absolute;
    opacity: 0;
    transform: scale(0) rotate(90deg);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: scale(0) rotate(-90deg);
}

.sun-icon {
    position: absolute;
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Profile Section */
.profile-section {
    background-color: var(--bg-secondary);
    margin-bottom: 0;
    padding: clamp(20px, 5vw, 40px) clamp(15px, 2.5vw, 20px);
    padding-top: 20px;
    padding-bottom: 20px;
    position: relative;
    width: 100%;
    max-width: 100%;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    box-sizing: border-box;
    transition: background-color 0.3s ease;
}

.profile-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100vw;
    height: 1px;
    background-color: var(--border-color);
    transition: background-color 0.3s ease;
    mask-image: linear-gradient(
        to right,
        transparent 0%,
        transparent 5%,
        black 10%,
        black 90%,
        transparent 95%,
        transparent 100%
    );
    -webkit-mask-image: linear-gradient(
        to right,
        transparent 0%,
        transparent 5%,
        black 10%,
        black 90%,
        transparent 95%,
        transparent 100%
    );
}

.profile-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    max-width: 800px;
    width: fit-content;
    margin: 0 auto;
    box-sizing: border-box;
}

.profile-image-container {
    flex-shrink: 0;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
}

.profile-info {
    text-align: center;
    flex: 1;
}

.profile-name {
    font-size: 1.8em;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.profile-title {
    font-size: 1.1em;
    color: var(--text-tertiary);
    margin-bottom: 5px;
}

.profile-affiliation {
    font-size: 0.95em;
    color: var(--text-tertiary);
    margin-bottom: 25px;
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.social-icon {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.social-icon:hover {
    color: var(--text-primary);
    opacity: 0.8;
}

.social-icon i,
.social-icon svg {
    display: block;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

/* Content Section */
.content-section {
    background-color: var(--bg-secondary);
    width: 100%;
    max-width: 100%;
    min-height: 100vh;
    padding: clamp(20px, 5vw, 40px) clamp(15px, 2.5vw, 20px);
    box-sizing: border-box;
    overflow-x: hidden;
    transition: background-color 0.3s ease;
}

.content-section > section {
    max-width: min(800px, calc(100% - 2 * clamp(15px, 2.5vw, 20px)));
    margin: 0 auto;
    box-sizing: border-box;
    overflow-x: hidden;
}

.content-section section {
    margin-bottom: 30px;
}

.content-section section:last-child {
    margin-bottom: 0;
}

h2 {
    font-size: 1.8em;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

#about-me p {
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-size: 1em;
    line-height: 1.6;
}

#about-me a {
    color: var(--link-color);
    text-decoration: underline;
}

#about-me a:hover {
    opacity: 0.8;
}


@media (min-width: 900px) {

    .profile-container {
        flex-direction: row;
        align-items: center;
        text-align: left;
        gap: 30px;
        max-width: 800px;
        width: fit-content;
    }

    .profile-info {
        text-align: left;
    }

    .social-icons {
        justify-content: flex-start;
    }
}


/* Education */
.education-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.education-list li {
    display: flex;
    gap: 10px;
    margin-bottom: 6px;
    color: var(--text-secondary);
    align-items: flex-start;
}

.education-list li:last-child {
    margin-bottom: 0;
}

.education-icon {
    flex-shrink: 0;
    color: var(--text-primary);
    margin-top: 2px;
    width: 18px;
    height: 18px;
}

.education-list li div {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.95em;
}

.education-list li strong {
    color: var(--text-primary);
    font-size: 1em;
    line-height: 1.2;
    display: block;
}

.education-location {
    line-height: 1.2;
    display: block;
}

/* Work Experience */
.work-experience-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.work-experience-list li {
    display: flex;
    gap: 10px;
    margin-bottom: 6px;
    color: var(--text-secondary);
    align-items: flex-start;
}

.work-experience-list li:last-child {
    margin-bottom: 0;
}

.work-icon {
    flex-shrink: 0;
    color: var(--text-primary);
    margin-top: 2px;
    width: 18px;
    height: 18px;
}

.work-experience-list li div {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.95em;
}

.work-experience-list li strong {
    color: var(--text-primary);
    font-size: 1em;
    line-height: 1.2;
    display: block;
}

.work-period {
    line-height: 1.2;
    display: block;
    color: var(--text-tertiary);
    font-size: 0.9em;
    /* Override mobile phone number styling */
    text-decoration: none !important;
    pointer-events: none !important;
}

.work-location {
    line-height: 1.2;
    display: block;
}

.work-description {
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 0.9em;
    line-height: 1.5;
    margin-bottom: 0;
}

/* Publications */
#publications {
    margin-top: 30px;
}

.publication {
    margin-bottom: 25px;
    padding: 15px;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
    box-sizing: border-box;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    transition: background-color 0.3s ease;
}

.publication-citation {
    color: var(--text-primary);
    font-size: 1em;
    line-height: 1.6;
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
    transition: color 0.3s ease;
}

.publication-citation strong {
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.publication-citation a {
    color: var(--link-color);
    text-decoration: underline;
    transition: color 0.3s ease;
}

.publication-citation a:hover {
    opacity: 0.8;
}

/* Publication Card Mode */
.publication-card {
    margin-bottom: 25px;
    padding: 20px;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
    box-sizing: border-box;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    transition: background-color 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.publication-journal {
    font-size: 0.85em;
    color: var(--text-primary);
    font-weight: 400;
    margin-bottom: 4px;
    transition: color 0.3s ease;
}

.publication-title {
    font-size: 1.2em;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 4px;
    transition: color 0.3s ease;
}

.publication-authors {
    font-size: 0.9em;
    color: var(--text-tertiary);
    line-height: 1.5;
    margin-bottom: 8px;
    transition: color 0.3s ease;
}

.publication-authors strong {
    color: var(--text-primary);
    font-weight: 600;
}

.publication-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 20px;
    background-color: var(--button-bg);
    color: #fff !important;
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.95em;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    width: fit-content;
    margin-top: 4px;
}

.publication-link:hover {
    background-color: var(--button-hover);
    opacity: 1;
}

.publication-link svg {
    display: inline-block;
    width: 15px;
    height: 15px;
    flex-shrink: 0;
}

/* Attribution Footer */
.attribution {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px 20px;
    margin-top: 0;
    min-height: 50px;
    font-size: 0.85em;
    color: var(--text-tertiary);
    background-color: var(--bg-primary);
    text-align: center;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.attribution a,
.attribution a:link,
.attribution a:visited {
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color 0.2s;
    line-height: 1.4;
    word-wrap: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
}

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

/* Navigation Links */
.nav-links {
    display: flex;
    gap: 12px;
    align-items: center;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none !important;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background-color 0.2s, color 0.2s;
    position: relative;
    font-size: 0.95em;
}

.nav-link:hover {
    background-color: var(--bg-tertiary);
}

.nav-link.active {
    background-color: var(--button-bg);
    color: #fff !important;
}

.nav-link.active:hover {
    background-color: var(--button-hover);
}

/* Projects Page Styles */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.project-card {
    padding: 20px;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
    box-sizing: border-box;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    transition: background-color 0.3s ease, transform 0.2s;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.project-card:hover {
    transform: translateY(-2px);
}

.project-category {
    font-size: 0.85em;
    color: var(--text-primary);
    font-weight: 400;
    margin-bottom: 4px;
    transition: color 0.3s ease;
}

.project-card h3 {
    font-size: 1.3em;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 8px;
    transition: color 0.3s ease;
}

.project-card p {
    font-size: 0.95em;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
    transition: color 0.3s ease;
    flex: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
}

.tech-tag {
    font-size: 0.75em;
    color: var(--text-tertiary);
    background-color: var(--bg-secondary);
    padding: 3px 8px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
    transition: background-color 0.2s, color 0.2s;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 20px;
    background-color: var(--button-bg);
    color: #fff !important;
    text-decoration: none !important;
    border-radius: 4px;
    font-size: 0.95em;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    width: fit-content;
    margin-top: 4px;
}

.project-link:hover {
    background-color: var(--button-hover);
    opacity: 1;
}

.project-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 20px;
    background-color: var(--button-bg);
    color: #fff !important;
    text-decoration: none !important;
    border-radius: 4px;
    font-size: 0.95em;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
    width: fit-content;
    margin-top: 4px;
}

.project-link:hover {
    background-color: var(--button-hover);
    opacity: 1;
}

.project-link svg {
    display: inline-block;
    width: 15px;
    height: 15px;
    flex-shrink: 0;
}

.project-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 8px;
    margin-bottom: 12px;
    cursor: pointer;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s ease;
}

.project-image:hover {
    border-color: var(--accent-color);
}

/* Responsive Design */
@media (max-width: 600px) {
    .navbar {
        padding: 8px clamp(15px, 2.5vw, 20px);
    }

    .nav-links {
        gap: 8px;
    }

    .nav-link {
        padding: 6px 12px;
        font-size: 0.9em;
    }

    .theme-toggle {
        width: 36px;
        height: 36px;
    }

    .theme-icon {
        width: 1rem;
        height: 1rem;
    }

    .profile-image {
        width: 150px;
        height: 150px;
    }

    h2 {
        font-size: 1.5em;
    }

    .projects-hero h1 {
        font-size: 2em;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .project-card {
        margin: 0 -5px;
    }

    .project-card.featured {
        margin: 0;
    }

    .project-content {
        padding: 16px;
    }

    .project-tech {
        gap: 6px;
    }

    .tech-tag {
        font-size: 0.75em;
        padding: 3px 8px;
    }

    .project-links {
        flex-direction: column;
        gap: 8px;
    }
}

/* Interests */
.interests-list {
    list-style: disc;
    padding-left: 20px;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    font-size: 0.95em;
}

.interests-list li {
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 4px;
}

.interests-list li:last-child {
    margin-bottom: 0;
}

/* Lightbox */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.lightbox-content {
    position: relative;
    max-width: min(90vw, 1200px);
    max-height: min(90vh, 800px);
    width: auto;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.lightbox-image {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 24px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Mobile responsiveness for lightbox */
@media (max-width: 768px) {
    .lightbox-content {
        max-width: min(95vw, 95%);
        max-height: min(95vh, 95%);
        padding: 15px;
    }

    .lightbox-close {
        top: -35px;
        width: 35px;
        height: 35px;
        font-size: 20px;
    }
}