:root {
    /* Default Theme (now with Pastel Fonts) */
    --bg-color: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-color: #2d3748;
    --secondary-text: #718096;
    --accent-color: #2563eb;
    --border-color: #e2e8f0;
    --container-width: 900px;
    --font-body: 'Quicksand', sans-serif;
    --font-heading: 'Nunito', sans-serif;
    --header-bg: #ffffff;
}

/* Dark Mode for Default Theme */
body.dark-mode,
html.dark-mode body {
    --bg-color: #1a202c;
    --bg-secondary: #2d3748;
    --text-color: #e2e8f0;
    --secondary-text: #a0aec0;
    --accent-color: #ff6b6b;
    --border-color: #4a5568;
    --header-bg: #1a202c;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    font-size: 16px;
    transition: background-color 0.3s, color 0.3s;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.2rem;
}

h2 {
    font-size: 1.5rem;
    margin-top: 2.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.2rem;
    margin-top: 1.5rem;
}

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

a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

ul,
ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.5rem;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    padding: 40px 0;
    margin-bottom: 40px;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.site-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-color);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 0;
}

.theme-toggle-mobile {
    display: none;
}

.theme-toggle-desktop {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--secondary-text);
    font-size: 1rem;
    padding: 5px;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
    font-size: 1.5rem;
    padding: 5px;
}

.site-nav {
    display: flex;
    gap: 25px;
    align-items: center;
}

.site-nav a {
    color: var(--secondary-text);
    font-size: 0.95rem;
    font-weight: 500;
}

.site-nav a:hover {
    color: var(--accent-color);
}

@media (max-width: 768px) {
    .header-controls {
        gap: 15px;
    }

    .theme-toggle-desktop {
        display: none;
    }

    .theme-toggle-mobile {
        display: block;
        background: none;
        border: none;
        cursor: pointer;
        color: var(--text-color);
        font-size: 1.2rem;
        padding: 5px;
    }

    .mobile-menu-toggle {
        display: block;
        z-index: 1001;
    }

    .site-nav {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 250px;
        background: var(--bg-color);
        flex-direction: column;
        padding: 80px 20px 20px;
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        z-index: 1000;
        gap: 20px;
        align-items: flex-start;
    }

    .site-nav.active {
        right: 0;
    }

    .site-nav a {
        font-size: 1.1rem;
        width: 100%;
        padding: 10px 0;
    }
}

/* Profile Section */
.profile-header {
    display: flex;
    gap: 50px;
    align-items: flex-start;
    margin-bottom: 60px;
}

.profile-avatar {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.profile-avatar img {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.profile-name {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 0 3px 0;
    color: var(--accent-color);
}

.profile-position {
    font-size: 1.1rem;
    color: var(--secondary-text);
    margin-bottom: 2px;
}

.profile-affiliation {
    font-size: 1.1rem;
    color: var(--secondary-text);
    margin-bottom: 6px;
}

.profile-email {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.95rem;
    color: var(--text-color);
    margin-bottom: 8px;
}

.profile-social-links {
    margin-top: 3px;
    display: flex;
    gap: 15px;
}

.profile-social-links a {
    color: var(--secondary-text);
    font-size: 1.4rem;
    transition: color 0.2s;
}

.profile-social-links a:hover {
    color: var(--accent-color);
    text-decoration: none;
}

.profile-info {
    flex: 1;
}

.profile-info .bio {
    margin-top: 0;
}

@media (max-width: 768px) {
    .profile-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

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

    .profile-avatar img {
        width: 150px;
        height: 150px;
    }
}

/* Publications */
.publications-divider {
    margin: 30px 0;
    border: none;
    height: 1px;
    background: var(--border-color);
}

.publication-item {
    margin-bottom: 30px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.publication-image {
    flex-shrink: 0;
    width: 160px;
    height: 120px;
    position: relative;
}

.publication-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.publication-badge {
    position: absolute;
    top: 5px;
    left: 5px;
    background: var(--accent-color);
    color: white;
    font-size: 0.6rem;
    font-weight: 600;
    padding: 2px 5px;
    border-radius: 2px;
    text-align: center;
    text-transform: uppercase;
    line-height: 1.2;
}

.publication-content {
    flex: 1;
}

.publication-title {
    font-weight: 600;
    font-size: 1.05rem;
    display: block;
    margin-bottom: 4px;
}

.publication-authors {
    color: var(--secondary-text);
    font-size: 0.95rem;
}

.publication-venue {
    font-style: italic;
    color: var(--secondary-text);
    font-size: 0.95rem;
}

.publication-links {
    margin-top: 6px;
}

.publication-links a {
    font-size: 0.85rem;
    margin-right: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

/* CV Page */
.cv-section {
    margin-bottom: 40px;
    padding: 25px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border-left: 4px solid var(--accent-color);
}

.cv-section h2 {
    color: var(--accent-color);
    font-size: 1.4rem;
    margin-top: 0;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.cv-item {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.cv-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

.cv-header {
    margin-bottom: 5px;
}

.cv-header-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.cv-title {
    font-weight: 600;
    font-size: 1.1rem;
}

.cv-date {
    font-family: var(--font-heading);
    font-style: italic;
    color: var(--secondary-text);
    font-size: 0.95rem;
    white-space: nowrap;
    margin-left: 20px;
}

.cv-subtitle {
    font-style: italic;
    color: var(--secondary-text);
    margin-bottom: 3px;
}

.cv-location {
    font-family: var(--font-heading);
    font-style: italic;
    color: var(--secondary-text);
    font-size: 0.95rem;
    white-space: nowrap;
    margin-left: 20px;
}

.cv-details {
    font-size: 0.95rem;
    color: var(--secondary-text);
}

.cv-details ul {
    padding-left: 20px;
    margin-top: 5px;
}

.cv-details li {
    margin-bottom: 3px;
}

/* Footer */
.site-footer {
    margin-top: 80px;
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.9rem;
    color: var(--secondary-text);
}

/* News Page */
.news-list {
    margin-top: 30px;
}

.news-item {
    display: flex;
    gap: 30px;
    margin-bottom: 18px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

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

.news-date {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--accent-color);
    min-width: 120px;
    flex-shrink: 0;
    font-size: 0.95rem;
    padding-top: 2px;
}

.news-content {
    flex: 1;
    color: var(--text-color);
}

.news-content p {
    margin: 0;
}

@media (max-width: 768px) {
    .news-item {
        flex-direction: column;
        gap: 8px;
    }

    .news-date {
        min-width: auto;
    }
}

/* Teaching course layout */
.cv-course-list {
    list-style: none;
    padding-left: 0;
    margin-top: 5px;
}

.cv-course-item {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 5px;
    padding-left: 15px;
    position: relative;
}

.cv-course-item::before {
    content: '–';
    position: absolute;
    left: 0;
    color: var(--secondary-text);
}

.cv-course-name {
    flex: 1;
}

.cv-course-term {
    font-family: var(--font-heading);
    font-style: italic;
    color: var(--secondary-text);
    font-size: 0.9rem;
    white-space: nowrap;
    margin-left: 20px;
}

/* Mobile publication styles */
@media (max-width: 768px) {
    .publication-image {
        display: none;
    }

    .publication-venue {
        display: none;
    }

    .publication-conference-mobile {
        display: inline-block;
        background: var(--accent-color);
        color: white;
        font-size: 0.7rem;
        font-weight: 600;
        padding: 3px 8px;
        border-radius: 3px;
        text-transform: uppercase;
        margin: 5px 0;
    }
}

/* Hide mobile conference badge on desktop */
.publication-conference-mobile {
    display: none;
}

@media (max-width: 768px) {
    .publication-conference-mobile {
        display: inline-block;
    }
}

/* CV URL links */
.cv-url {
    color: var(--accent-color);
    font-size: 0.85rem;
    margin-left: 8px;
    text-decoration: none;
}

.cv-url:hover {
    color: var(--text-color);
}

/* Quote Section */
.quote-container {
    margin: 20px 0 0 0;
    padding: 18px 25px;
    background-color: transparent;
    position: relative;
    border-left: 3px solid var(--border-color);
    border-radius: 2px;
    max-width: 250px;
}

.quote-text {
    font-family: var(--font-body);
    font-size: 0.92rem;
    color: var(--secondary-text);
    margin-bottom: 10px;
    line-height: 1.65;
    font-style: italic;
    font-weight: 400;
}

.quote-author {
    text-align: right;
    font-size: 0.85rem;
    color: var(--secondary-text);
    font-weight: 600;
    font-style: normal;
    letter-spacing: 0.3px;
}

.quote-author span {
    font-weight: 400;
    font-style: normal;
    margin-left: 5px;
}