/* Design tokens */
:root {
    --color-bg: #ffffff;
    --color-text: #2d3748;
    --color-muted: #718096;
    --color-primary: #4299e1;
    --color-primary-strong: #2b6cb0;
    --color-accent: #2c7a7b;
    --color-accent-warm: #e86c3a;
    --color-surface: #ffffff;
    --color-surface-subtle: #f7f8fa;
    --color-border: #e9ecef;
    --color-link: #0077cc;
    --color-link-hover: #005ea6;
    --color-footer-bg: #1a202c;
    --color-footer-text: #e2e8f0;

    --shadow-1: 0 2px 8px rgba(0, 0, 0, 0.07);
    --shadow-2: 0 8px 24px -4px rgba(0, 0, 0, 0.1);

    --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', 'Monaco', monospace;
    --font-size-base: clamp(15px, 0.92rem + 0.2vw, 17px);
    --font-size-h1: clamp(1.8rem, 1.2rem + 2.2vw, 2.8rem);
    --font-size-h2: clamp(1.4rem, 1rem + 1.2vw, 1.75rem);
    --font-size-h3: clamp(1.1rem, 0.95rem + 0.6vw, 1.25rem);
    --line-height: 1.65;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-pill: 50px;

    --spacing-section: 48px;
    --transition: 0.2s ease;
}

.dark-theme {
    --color-bg: #1a202c;
    --color-text: #e2e8f0;
    --color-muted: #a0aec0;
    --color-primary: #63b3ed;
    --color-primary-strong: #4a90d9;
    --color-accent: #4fd1c5;
    --color-accent-warm: #fbd38d;
    --color-surface: #2d3748;
    --color-surface-subtle: #283141;
    --color-border: #4a5568;
    --color-link: #63b3ed;
    --color-link-hover: #90cdf4;
    --color-footer-bg: #171923;
    --color-footer-text: #e2e8f0;

    --shadow-1: 0 2px 8px rgba(0, 0, 0, 0.25);
    --shadow-2: 0 8px 24px -4px rgba(0, 0, 0, 0.4);
}

body {
    font-family: var(--font-body);
    margin: 0;
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    background-color: var(--color-bg);
    color: var(--color-text);
}

html {
    scroll-behavior: smooth;
    margin: 0;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 9999;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 25px;
    box-sizing: border-box;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

.nav-scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

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

nav li {
    margin-left: 15px;
    float: left;
}

nav li:first-child {
    margin-left: 0;
}

nav li:last-child {
    float: right;
}


nav a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    font-size: 15px;
    transition: color var(--transition);
    position: relative;
    padding: 5px 0;
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 0;
    height: 2.5px;
    border-radius: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

nav a:hover::after {
    width: 100%;
}

.dropdown-btn {
    display: none;
    background: none;
    border: none;
    position: relative;
    left: -40%;
}

.dropdown-btn img {
    width: 40px;
    height: 40px;
    filter: invert(0.4);
}

@media (max-width: 600px) {
    nav {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 8px 15px;
        height: 60px;
    }

    nav ul {
        display: block;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background-color: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        padding: 10px 0;
        z-index: 1000;

        /* Initial hidden state */
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: all 0.3s ease-in-out;
        pointer-events: none;
    }

    nav ul li {
        width: 100%;
        margin: 0;
        padding: 0;
    }

    nav ul li a {
        display: block;
        padding: 12px 20px;
        text-align: center;
        font-size: 16px;
        border-left: 3px solid transparent;
        transition: all 0.2s ease;
    }

    nav ul li a:hover {
        background-color: rgba(66, 153, 225, 0.08);
        border-left: none;
        border-bottom: 2.5px solid var(--color-primary);
    }

    .dropdown-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        background: none;
        border: none;
        padding: 8px;
        margin: 0;
        cursor: pointer;
        position: relative;
        left: 0;
    }

    .dropdown-btn img {
        width: 28px;
        height: 28px;
        transition: transform 0.3s ease;
    }

    .dark-theme nav ul {
        background-color: rgba(26, 32, 44, 0.95);
    }

    .dark-theme nav ul li a:hover {
        background-color: rgba(99, 179, 237, 0.1);
        border-left: none;
        border-bottom: 3px solid var(--color-primary);
    }

    #theme-toggle {
        position: relative;
        right: 0;
        top: 0;
        margin: 0 0 0 10px;
    }

    .nav-buttons {
        display: flex;
        align-items: center;
        gap: 5px;
    }

    nav ul.show {
        /* Visible state */
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        pointer-events: auto;
    }
}

@media (max-width: 600px) {
    nav ul.show {
        display: block !important;
        /* Slide in from top */
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }
}

main {
    margin-top: 10px;
}

#intro {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2b6cb0, var(--color-primary));
    min-height: 50vh;
    padding: 70px 30px 40px;
}

/* Three.js background container inside #intro */
#intro-three-container {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

#intro {
    position: relative;
    overflow: hidden;
}

#intro>*:not(#intro-three-container) {
    position: relative;
    z-index: 1;
}

.pp {
    width: 180px;
    height: 180px;
    object-fit: cover;
    border-radius: 50%;
    margin-bottom: 18px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.15);
    border: 3px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.3s ease;
}

.pp:hover {
    transform: scale(1.03);
}

#intro h1 {
    font-size: var(--font-size-h1);
    color: #fff;
    text-align: center;
    margin-bottom: 8px;
}

#intro h3 {
    font-size: var(--font-size-h3);
    color: #fff;
    text-align: center;
    margin-bottom: 0;
    opacity: 0.8;
}

#intro h3 a {
    color: #fff;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

#intro h3 a:hover {
    opacity: 0.75;
}

.contact_wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 28px;
    gap: 12px;
}

.contact_wrapper button {
    margin: 0;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background-color: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    cursor: pointer;
    transition: all var(--transition);
    padding: 12px;
    border-radius: var(--radius-md);
}

.contact_wrapper button:hover {
    background-color: rgba(255, 255, 255, 0.18);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.contact_wrapper img {
    width: 32px;
    height: 32px;
    filter: brightness(0) invert(1);
}

@media (max-width: 768px) {
    .contact_wrapper {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        padding: 0 20px;
        width: 100%;
        max-width: 280px;
    }

    .contact_wrapper a {
        width: 100%;
    }

    .contact_wrapper button {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    /* Center a single button in the last row */
    .contact_wrapper a:last-child:nth-child(odd) {
        grid-column: 1 / -1;
        width: 50%;
        margin: 0 auto;
    }
}

.section {
    width: 70%;
    max-width: 1000px;
    padding: var(--spacing-section) 20px;
    margin: 0 auto;
}

#about-me,
#publications,
#open-source {
    position: relative;
}

#about-me::before,
#publications::before,
#open-source::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100vw;
    background: var(--color-surface-subtle);
    z-index: -1;
}

.section h2 {
    font-size: var(--font-size-h2);
    color: var(--color-text);
    position: relative;
    margin-bottom: 28px;
    padding-bottom: 10px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--color-primary), transparent);
}

#about-me p {
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 24px;
    color: var(--color-text);
}

#about-me a {
    color: var(--color-link);
    text-decoration: none;
    transition: color var(--transition);
}

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

.news-wrapper {
    display: flex;
    flex-direction: column;
    width: 100%;
    margin-bottom: 20px;
    gap: 6px;
}

.news-row {
    padding: 10px 14px;
    min-height: 40px;
    display: flex;
    align-items: center;
    background: transparent;
    border-radius: var(--radius-md);
    border-left: 3px solid transparent;
    transition: transform 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}

.news-row:hover {
    transform: translateX(4px);
    border-left-color: var(--color-primary);
    background-color: var(--color-surface-subtle);
}

.news-content {
    font-size: 15px;
    margin-left: 16px;
    text-align: left;
    word-wrap: break-word;
    line-height: 1.5;
    color: var(--color-text);
}

.date-pill {
    background-color: var(--color-primary);
    font-weight: 600;
    display: inline-block;
    padding: 3px 14px;
    text-align: center;
    border-radius: var(--radius-pill);
    color: #ffffff;
    white-space: nowrap;
    min-width: 80px;
    font-size: 13px;
    letter-spacing: 0.3px;
}

#news a {
    color: var(--color-link);
    text-decoration: none;
    transition: color var(--transition);
}

#show-more-btn {
    display: block;
    margin: 18px auto 0;
    background-color: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
    padding: 8px 24px;
    border-radius: var(--radius-pill);
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition);
}

#show-more-btn:hover {
    background-color: var(--color-primary);
    color: #fff;
    box-shadow: 0 2px 10px rgba(66, 153, 225, 0.25);
}

.extra-news {
    opacity: 0;
}

.extra-news.show {
    opacity: 1;
    transition: opacity 0.5s ease-in-out;
}



.publications-year {
    font-size: 14px;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 12px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--color-primary);
}

.publications-yealy-wrapper {
    margin-top: 12px;
    border-top: 1px solid var(--color-border);
    padding-top: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.publication {
    display: flex;
    align-items: flex-start;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-1);
    padding: 18px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    margin-bottom: 20px;
    gap: 22px;
    width: 100%;
    border: 1px solid var(--color-border);
}

.publication:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-2);
}

.publication-thumbnail {
    width: 180px;
    min-width: 180px;
    height: 180px;
    object-fit: cover;
    border-radius: var(--radius-md);
    transition: transform var(--transition);
    align-self: center;
}

.publication-thumbnail:hover {
    transform: scale(1.08);
}

.publication-content {
    flex: 1;
    min-width: 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.publication-title {
    color: var(--color-primary-strong);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 2px;
    line-height: 1.4;
}

.publication-authors {
    color: var(--color-muted);
    font-size: 15px;
    margin-bottom: 4px;
    line-height: 1.5;
}

.publication-authors a {
    color: var(--color-muted);
    text-decoration: none;
    transition: color var(--transition);
}

.publication-authors a:hover {
    color: var(--color-primary);
}

.publication-journal {
    color: var(--color-accent);
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 4px;
}

.publication-award {
    font-weight: 600;
    color: var(--color-accent-warm);
    padding: 2px 10px;
    border-radius: var(--radius-sm);
    display: inline-block;
    font-size: 14px;
    background: rgba(232, 108, 58, 0.08);
}

.publication-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 4px;
}

.publication-buttons a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 14px;
    background-color: var(--color-primary);
    color: #fff;
    text-decoration: none;
    border-radius: var(--radius-pill);
    font-size: 13px;
    font-weight: 500;
    transition: transform var(--transition), background-color var(--transition), box-shadow var(--transition);
    border: none;
}

.publication-buttons a:hover {
    background-color: var(--color-primary-strong);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(66, 153, 225, 0.3);
}

.publication-buttons a:active {
    transform: translateY(0);
    box-shadow: none;
}

.publication-buttons a:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

.publication-abstract {
    font-size: 14px;
    line-height: 1.65;
    margin-top: 12px;
    background-color: var(--color-surface-subtle);
    padding: 14px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-primary);
    position: relative;
    width: 100%;
    box-sizing: border-box;
}

.publication-bibtex {
    font-size: 13px;
    line-height: 1.5;
    margin-top: 12px;
    background-color: var(--color-surface-subtle);
    padding: 0px 14px;
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    white-space: pre;
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-accent);
    position: relative;
    overflow-x: auto;
    width: 100%;
    box-sizing: border-box;
}

.publication-bibtex::before {
    content: 'BibTeX';
    position: absolute;
    top: 0px;
    left: 10px;
    background-color: var(--color-surface-subtle);
    padding: 0 6px;
    font-size: 11px;
    color: var(--color-muted);
    font-family: var(--font-body);
    font-weight: 500;
    z-index: 1;
    height: 16px;
    line-height: 16px;
    border-radius: 3px;
    border: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-surface-subtle);
}

.publication-abstract,
.publication-bibtex {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
    width: 100%;
    margin-top: 8px;
}

.publication-abstract.show,
.publication-bibtex.show {
    max-height: 2000px;
    transition: max-height 0.5s ease-in;
    overflow-x: auto;
    overflow-y: visible;
    width: 100%;
    align-self: stretch;
}

.publication-abstract p {
    margin: 0 0 10px 0;
}

.publication-abstract p:last-child {
    margin-bottom: 0;
}

.teaching-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 24px;
    width: 100%;
}

.teaching-row {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 18px 22px;
    box-shadow: var(--shadow-1);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-primary);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    width: 100%;
    box-sizing: border-box;
}

.teaching-row:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-2);
}

.course-date {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-muted);
    letter-spacing: 0.3px;
}

.course-position {
    font-size: 15px;
    font-style: italic;
    font-weight: 600;
    color: var(--color-text);
}

.course-name {
    font-size: 16px;
    font-weight: 600;
    margin-right: 5px;
    color: var(--color-accent);
}

.course-school {
    font-size: 15px;
    font-style: italic;
    color: var(--color-primary);
}

.teaching-row ul {
    margin-top: 10px;
    margin-left: 16px;
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-muted);
}

.teaching-row li {
    margin-bottom: 4px;
}

.repo-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.repo-row {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 16px 18px;
    margin: 0;
    box-shadow: var(--shadow-1);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-primary);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.repo-row:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-2);
}

.repo-title {
    color: var(--color-primary-strong);
    font-size: 15px;
    font-weight: 600;
    margin-right: 10px;
}

.repo-star {
    height: 22px;
    transition: transform var(--transition);
}

.repo-star:hover {
    transform: scale(1.08);
}

#open-source h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
}

#misc ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

#misc li {
    margin-bottom: 8px;
    margin-left: 20px;
    font-size: 15px;
    font-style: italic;
    color: var(--color-muted);
}

#misc>div {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 22px;
    box-shadow: var(--shadow-1);
    border: 1px solid var(--color-border);
    margin-bottom: 20px;
}

#misc h3 {
    color: var(--color-text);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 14px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-primary);
}

#misc>div ul {
    list-style-type: none;
    padding: 0;
}

#misc>div li {
    position: relative;
    padding-left: 22px;
    margin-bottom: 10px;
    margin-left: 0;
    font-size: 14px;
    color: var(--color-muted);
    transition: transform 0.2s ease;
    line-height: 1.5;
}

#misc>div li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

#misc>div li:hover {
    transform: translateX(4px);
}

#misc a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

#misc a:hover {
    color: var(--color-primary-strong);
}

footer {
    background-color: var(--color-footer-bg);
    padding: 32px 20px;
    margin-top: 60px;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

footer p {
    color: var(--color-footer-text);
    font-size: 0.9rem;
    margin: 0;
    text-align: center;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

footer a {
    color: var(--color-link);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
    padding: 2px 4px;
    border-radius: var(--radius-sm);
}

footer a:hover {
    color: var(--color-link-hover);
}

@media (max-width: 767px) {
    footer {
        padding: 24px 15px;
    }

    footer p {
        font-size: 0.85rem;
    }
}

/* Responsive adjustments */
@media (max-width: 767px) {
    .section {
        width: 90%;
        padding: 36px 16px;
    }


    .contact_wrapper {
        flex-direction: column;
    }

    .contact_wrapper button {
        margin-bottom: 8px;
    }

    .news-row {
        text-align: left;
        display: flex;
        flex-direction: row;
        align-items: center;
        height: auto;
    }

    .news-content {
        font-size: 14px;
        margin-left: 14px;
        text-align: left;
    }

    .date-pill {
        padding: 3px 10px;
        font-size: 12px;
    }

    .publication {
        flex-direction: column;
        height: auto;
        padding: 14px;
    }

    .publication-thumbnail {
        width: 100%;
        height: auto;
        margin-bottom: 12px;
    }

    .publication-content {
        width: 100%;
    }

    .publication-title {
        font-size: 16px;
    }

    .publication-authors {
        font-size: 14px;
    }

    .publication-journal {
        font-size: 14px;
    }

    .repo-wrapper {
        grid-template-columns: 1fr;
    }

    #misc>div {
        padding: 16px;
    }
}

/* Theme toggle */
#theme-toggle {
    background: none;
    border: none;
    padding: 5px;
    cursor: pointer;
    height: 36px;
    width: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    margin-left: 20px;
    margin-right: 25px;
    transition: background-color var(--transition);
}

#theme-toggle:hover {
    background-color: rgba(0, 0, 0, 0.08);
}

.moon-icon {
    display: none;
}

.dark-theme .sun-icon {
    display: none;
}

.dark-theme .moon-icon {
    display: block;
}

.dark-theme #theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

/* Dark theme overrides (most styles already use CSS variables) */
.dark-theme {
    background-color: var(--color-bg);
    color: var(--color-text);
}

.dark-theme nav {
    background-color: rgba(26, 32, 44, 0.92);
    backdrop-filter: blur(12px);
}

.dark-theme nav a {
    color: var(--color-text);
}

.dark-theme .publication,
.dark-theme .teaching-row,
.dark-theme .repo-row,
.dark-theme #misc>div {
    background-color: var(--color-surface);
    border-color: var(--color-border);
}

.dark-theme .publication-title {
    color: var(--color-primary);
}

.dark-theme .publication-buttons a:hover {
    background-color: var(--color-primary-strong);
    box-shadow: 0 2px 8px rgba(99, 179, 237, 0.3);
}

.dark-theme .publication-buttons a {
    color: #fff;
}

.dark-theme .date-pill {
    color: #0f1b2d;
}

.dark-theme .publication-award {
    color: var(--color-accent-warm);
    background-color: rgba(251, 211, 141, 0.1);
}

.dark-theme .repo-title {
    color: var(--color-primary);
}

.dark-theme .publication-bibtex {
    background-color: var(--color-surface);
    border-color: var(--color-border);
    color: var(--color-text);
}

.dark-theme .publication-bibtex::before {
    background-color: var(--color-surface);
    border-color: var(--color-border);
    border-bottom-color: var(--color-surface);
    color: var(--color-muted);
}

.dark-theme .publication-abstract {
    background-color: var(--color-surface-subtle);
    border-color: var(--color-border);
    color: var(--color-text);
}

.dark-theme footer {
    background-color: var(--color-footer-bg);
}

.dark-theme a {
    color: var(--color-link);
}

.dark-theme a:hover {
    color: var(--color-link-hover);
}

.dark-theme .dropdown-btn img {
    filter: none;
}

.dark-theme .news-row:hover {
    background-color: var(--color-surface);
}

/* BibTeX copy button */
.bibtex-copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 10px;
    font-size: 12px;
    color: var(--color-muted);
    background-color: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font-body);
    display: flex;
    align-items: center;
    gap: 4px;
}

.bibtex-copy-btn:hover {
    background-color: var(--color-surface-subtle);
    color: var(--color-text);
}

.bibtex-copy-btn svg {
    width: 14px;
    height: 14px;
}

.bibtex-copy-btn.copied {
    background-color: #38a169;
    color: white;
    border-color: #38a169;
}

.dark-theme .bibtex-copy-btn.copied {
    background-color: #2f855a;
    border-color: #2f855a;
}

@media (max-width: 600px) {
    #theme-toggle {
        position: absolute;
        right: 25px;
        top: 15px;
    }
}

/* Contact icons */
.contact_wrapper .contact-icon {
    width: 30px;
    height: 30px;
    filter: brightness(0) invert(1);
    opacity: 0.9;
    transition: opacity var(--transition);
}

.contact_wrapper button:hover .contact-icon {
    opacity: 1;
}

/* Responsive hero */
@media (max-width: 768px) {
    #intro h1 {
        font-size: 2.2rem;
    }

    #intro h3 {
        font-size: 1.1rem;
        padding: 0 15px;
    }

    .pp {
        width: 150px;
        height: 150px;
    }
}

@media (max-width: 480px) {
    #intro h1 {
        font-size: 2rem;
    }

    #intro h3 {
        font-size: 1rem;
    }

    .pp {
        width: 130px;
        height: 130px;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border: 2px solid var(--color-bg);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-muted);
}

/* Publication thumbnail link wrapper */
.publication-thumbnail-link {
    display: block;
    width: 180px;
    min-width: 180px;
    height: 180px;
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: transform var(--transition);
    align-self: center;
    flex-shrink: 0;
}

.publication-thumbnail-link:hover {
    transform: scale(1.06);
}

.publication-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-md);
}

@media (max-width: 768px) {
    .publication-thumbnail-link {
        position: static;
        width: 100%;
        height: auto;
        min-width: unset;
        aspect-ratio: 1;
    }
}

/* Accessibility */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.skip-link {
    position: absolute;
    left: -999px;
    top: -999px;
    background: var(--color-primary);
    color: white;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    z-index: 10000;
}

.skip-link:focus {
    left: 12px;
    top: 12px;
}

.section {
    scroll-margin-top: 80px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
}