/* CSS Variables for Theme */
:root {
    /* Light Theme */
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --accent-color: #666666;
    --accent-hover: #4a4a4a;
    --link-color: #ff6600;
    --link-hover: #ff8800;
    --border-color: #e0e0e0;
    --card-bg: #f8f8f8;
    --nav-bg: rgba(255, 255, 255, 0.95);
    --shadow: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-color: #000000;
    --text-color: #ffffff;
    --accent-color: #cccccc;
    --accent-hover: #ffffff;
    --link-color: #006B54;
    --link-hover: #008B6B;
    --border-color: #333333;
    --card-bg: #0a0a0a;
    --nav-bg: rgba(0, 0, 0, 0.95);
    --shadow: rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link.active {
    color: var(--accent-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--accent-color);
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: normal;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Menlo', 'Consolas', monospace;
}

.theme-toggle:hover {
    background-color: var(--card-bg);
    border-color: var(--accent-color);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2rem 0;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

.page {
    display: none;
    animation: fadeIn 0.3s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--accent-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
}

.content-section {
    margin-bottom: 3rem;
}

.content-section h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.content-section h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

/* General Markdown Styles for all pages */
.container h1:first-child {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--accent-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
}

.container h1:not(:first-child) {
    font-size: 2rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.container h2 {
    font-size: 1.8rem;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.container h3 {
    font-size: 1.4rem;
    margin-top: 1.2rem;
    margin-bottom: 0.8rem;
    color: var(--text-color);
}

.container h4, .container h5, .container h6 {
    font-size: 1.2rem;
    margin-top: 1rem;
    margin-bottom: 0.6rem;
    color: var(--text-color);
}

.container p {
    margin: 1rem 0;
    line-height: 1.8;
}

.container ul, .container ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.container li {
    margin: 0.5rem 0;
}

.container code {
    background-color: var(--card-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9em;
    border: 1px solid var(--border-color);
    font-family: 'Menlo', 'Consolas', 'Monaco', 'Courier New', monospace;
}

.container pre {
    background-color: var(--card-bg);
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    margin: 1.5rem 0;
}

.container pre code {
    background-color: transparent;
    padding: 0;
    border: none;
    font-size: 0.9rem;
}

.container blockquote {
    border-left: 4px solid var(--link-color);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-color);
    opacity: 0.9;
    font-style: italic;
}

.container table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.container th, .container td {
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    text-align: left;
}

.container th {
    background-color: var(--card-bg);
    font-weight: bold;
}

.container hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

.container img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    margin: 1.5rem 0;
}

/* Strong/Bold text styling */
.container strong,
.container b,
strong,
b {
    font-weight: 700;
    color: var(--text-color);
    /* Use a font that supports bold better for monospace */
    font-family: 'Menlo', 'Consolas', 'Monaco', 'Courier New', monospace;
    /* Make bold more visible with letter spacing */
    letter-spacing: 0.03em;
    /* Ensure bold is rendered */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Fallback: if bold doesn't work well, use color emphasis */
@supports not (font-weight: 700) {
    .container strong,
    .container b,
    strong,
    b {
        color: var(--accent-color);
    }
}

.intro-text {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

/* Lists */
.news-list,
.brief-list {
    list-style: none;
    padding-left: 0;
}

.news-list li,
.brief-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.news-list li:last-child,
.brief-list li:last-child {
    border-bottom: none;
}

/* Contact list - inline display */
.contact-list {
    padding: 1rem 0;
    line-height: 1.8;
    color: var(--text-color);
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
}

.contact-list .contact-item {
    display: inline-flex;
    align-items: baseline;
    gap: 0.25rem;
}

.contact-list .contact-item::after {
    content: '·';
    margin-left: 1.25rem;
    color: var(--text-color);
    opacity: 0.5;
    font-weight: bold;
}

.contact-list .contact-item:last-child::after {
    content: '';
    margin-left: 0;
}

.contact-list a {
    color: var(--link-color);
    text-decoration: none;
}

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

.citation-count {
    font-weight: 600;
    color: var(--accent-color);
}

/* GitHub star badge: same style as project links (gray bg + white text in light theme) */
.github-stars-badge {
    position: absolute;
    right: 0.75rem;
    bottom: 0.75rem;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
    line-height: 1.2;
    color: white;
    background-color: var(--accent-color);
    border-radius: 6px;
    transition: background-color 0.3s ease;
}

.github-stars-badge .github-stars-icon {
    color: white;
    font-size: 0.85em;
}

.github-stars-badge .github-stars-num {
    font-weight: 600;
    color: white;
}

.date {
    color: var(--accent-color);
    font-weight: bold;
    margin-right: 1rem;
    display: inline-block;
    min-width: 80px;
}

/* Links */
a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Publication Items */
.publication-item {
    position: relative;
    background-color: var(--card-bg);
    padding: 0.9rem 1.1rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: box-shadow 0.3s ease;
}

.publication-item:hover {
    box-shadow: 0 4px 12px var(--shadow);
}

.publication-item h3 {
    margin-bottom: 0.3rem;
    color: var(--text-color);
    font-size: 1.05em;
}

.authors {
    margin: 0.2rem 0;
    color: var(--text-color);
    opacity: 0.9;
    font-size: 0.95em;
}

.venue {
    margin: 0.2rem 0;
    font-style: italic;
    color: var(--accent-color);
    font-size: 0.9em;
}

.links {
    margin: 0.4rem 0;
    display: flex;
    gap: 0.75rem;
}

.links a {
    padding: 0.35rem 0.75rem;
    font-size: 0.9em;
    background-color: var(--accent-color);
    color: white;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

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

.highlights {
    list-style: none;
    padding-left: 0;
    margin-top: 0.4rem;
}

.highlights li {
    padding: 0.15rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.highlights li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* Project Items */
.project-item {
    position: relative;
    background-color: var(--card-bg);
    padding: 1.5rem;
    margin-bottom: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: box-shadow 0.3s ease;
}

.project-item:hover {
    box-shadow: 0 4px 12px var(--shadow);
}

.tech-stack {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.8;
}

/* Blog Styles */
.blog-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.blog-item {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: box-shadow 0.3s ease;
}

.blog-item:hover {
    box-shadow: 0 4px 12px var(--shadow);
}

.blog-item h3 {
    margin-bottom: 0.5rem;
}

.blog-item h3 a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.blog-item h3 a:hover {
    color: var(--link-color);
    text-decoration: underline;
}

.blog-date {
    color: var(--text-color);
    opacity: 0.7;
    font-size: 0.9rem;
    margin: 0.5rem 0;
}

.blog-description {
    color: var(--text-color);
    opacity: 0.9;
    margin-top: 0.5rem;
}

.blog-nav {
    margin-bottom: 2rem;
}

.back-link {
    color: var(--link-color);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

/* Markdown Content Styles */
.blog-markdown {
    font-family: 'Menlo', 'Consolas', 'Monaco', 'Courier New', monospace;
    line-height: 1.8;
    color: var(--text-color);
}

.blog-markdown h1 {
    font-size: 2rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.blog-markdown h2 {
    font-size: 1.6rem;
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
    color: var(--accent-color);
}

.blog-markdown h3 {
    font-size: 1.3rem;
    margin-top: 1.2rem;
    margin-bottom: 0.6rem;
    color: var(--text-color);
}

.blog-markdown h4, .blog-markdown h5, .blog-markdown h6 {
    font-size: 1.1rem;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.blog-markdown p {
    margin: 1rem 0;
}

.blog-markdown ul, .blog-markdown ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.blog-markdown li {
    margin: 0.5rem 0;
}

.blog-markdown code {
    background-color: var(--card-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.9em;
    border: 1px solid var(--border-color);
}

.blog-markdown pre {
    background-color: var(--card-bg);
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    margin: 1.5rem 0;
}

.blog-markdown pre code {
    background-color: transparent;
    padding: 0;
    border: none;
    font-size: 0.9rem;
}

.blog-markdown blockquote {
    border-left: 4px solid var(--link-color);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-color);
    opacity: 0.9;
    font-style: italic;
}

.blog-markdown a {
    color: var(--link-color);
    text-decoration: none;
}

.blog-markdown a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

.blog-markdown table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.blog-markdown th, .blog-markdown td {
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    text-align: left;
}

.blog-markdown th {
    background-color: var(--card-bg);
    font-weight: bold;
}

.blog-markdown hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

.blog-markdown img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    margin: 1.5rem 0;
}

/* Footer */
.footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
    color: var(--text-color);
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }

    .page-title {
        font-size: 2rem;
    }

    .container {
        padding: 0 1rem;
    }
}