@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap');

:root {
    --bg-primary: #fbfaf8;
    --bg-card: #FFFFFF;
    --text-primary: #242424;
    --text-secondary: #5f6368;
    --accent-color: #2f5f8f;
    --border-color: #dedbd5;
    --nav-bg: rgba(251, 250, 248, 0.95);
    --code-bg: #f3f4f6;
    --nav-height: 60px;
    --radius-sm: 4px;
    --radius-pill: 100px;
    --transition-fast: 0.2s ease;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.08);

    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

[data-theme='dark'] {
    --bg-primary: #1d1d1b;
    --bg-card: #262624;
    --text-primary: #e8e6e3;
    --text-secondary: #aaa59f;
    --accent-color: #8aa9c4;
    --border-color: #3a3834;

    --nav-bg: rgba(29, 29, 27, 0.95);
    --code-bg: #292927;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.28);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.36);
}

body {
    font-family: var(--font-main);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    margin: 0;
    padding: 0;
    line-height: 1.65;
    font-size: 16px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    border-bottom: 1px solid var(--border-color);
    height: var(--nav-height);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    background: var(--nav-bg);
    z-index: 1000;
    backdrop-filter: blur(5px);
    transition: background 0.3s ease, border-color 0.3s ease;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.nav-brand {
    font-weight: 700;
    font-size: 1.2em;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95em;
    transition: color var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-color);
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1.5rem;
    padding: 0.5rem;
    transition: color var(--transition-fast);
}

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

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0; 
        right: 0;
        background: var(--nav-bg);
        flex-direction: column;
        padding: 1.5rem 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        text-align: center;
        gap: 20px;
    }

    .nav-links.active {
        display: flex;
        animation: slideDown 0.3s ease-out forwards;
    }
    
    @keyframes slideDown {
        from { opacity: 0; transform: translateY(-10px); }
        to { opacity: 1; transform: translateY(0); }
    }
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1.1rem;
    padding: 0.5rem;
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    color: var(--accent-color);
}



/* Home Header */
.home-header {
    display: flex;
    justify-content: center; 
    align-items: center;
    gap: 60px;
    margin-top: 60px; 
    margin-bottom: 60px; 
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.header-text {
    flex: 1;
}

.header-name {
    font-size: 2em;
    font-weight: 800;
    margin-bottom: 15px;
    color: var(--text-primary);
    line-height: 1.2;
}

.header-bio {
    font-size: 1.2em;
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.5;
}

.header-profile {
    color: var(--text-secondary);
    font-size: 1.15em;
    line-height: 1.5;
}

.header-position {
    color: var(--text-primary);
    font-weight: 600;
}

.header-affiliation {
    margin-top: 2px;
}

.header-email {
    margin-top: 22px;
    font-size: 1.05em;
    color: var(--text-secondary);
}

.header-actions {
    margin-top: 0;
}

.header-avatar-container {
    flex: 0 0 auto;
    display: flex;
    justify-content: center; 
    align-items: center; 
}

.avatar {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--bg-card);
}

.social-links {
    display: flex;
    gap: 18px;
    font-size: 1.55rem;
    align-items: center;
}

.social-links a {
    color: var(--text-secondary);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.social-links a:hover {
    color: var(--accent-color);
    transform: translateY(-2px);
}

/* Main Content */
.main-content {
    min-width: 0;
    max-width: 800px;
    margin: 0 auto;
    padding: 0;
}

.main-content.single-column {
    max-width: 850px;
}

.main-content.single-column p {
    max-width: none;
    margin-left: 0;
    margin-right: 0;
}

.main-content.single-column .pub-list,
.main-content.single-column .pdf-container {
    max-width: 100%;
}

.main-content h1 {
    font-size: 1.85em;
    line-height: 1.25;
    margin-top: 40px;
    margin-bottom: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

.main-content h2 {
    font-size: 1.42em;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
    margin-top: 52px;
    margin-bottom: 28px;
    color: var(--text-primary);
}

.main-content h2:first-child {
    margin-top: 0;
}

.main-content p {
    margin-bottom: 1.25em;
    color: var(--text-primary);
}

.page-intro {
    color: var(--text-secondary);
    margin-top: -0.5rem;
    margin-bottom: 2rem;
}

.section-more {
    margin-top: -20px;
    text-align: right;
    font-weight: 600;
}

/* News */
.news-table {
    width: 100%;
    border-collapse: collapse;
}

.news-date {
    width: 18%; 
    min-width: 92px;
    vertical-align: top;
    font-weight: 500;
    color: var(--text-secondary);
    padding-bottom: 16px;
    font-size: 0.9em;
    white-space: nowrap;
}

.news-text {
    padding-bottom: 16px;
    color: var(--text-primary);
}

.news-text p {
    margin: 0;
}

code {
    background-color: var(--code-bg);
    border-radius: var(--radius-sm);
    padding: 0.2em 0.4em;
    font-family: inherit;
    font-size: 0.9em;
    color: var(--accent-color);
    margin: 0 2px;
}

[data-theme='dark'] code {
    color: #b8cde0;
}

/* Publications */
.pub-year-section {
    margin-bottom: 12px;
}

.pub-year {
    margin-top: 48px;
    margin-bottom: 28px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.35em;
    font-weight: 600;
}

.pub-year-section:first-of-type .pub-year {
    margin-top: 0;
}

.pub-item {
    display: flex;
    gap: 28px;
    margin-bottom: 46px;
    align-items: flex-start;
}

.pub-img-col {
    flex-shrink: 0;
    width: 170px;
    max-width: 170px;
}

.pub-abbr {
    display: block;
    width: 100%;
    text-align: center;
    background-color: transparent;
    color: var(--accent-color);
    padding: 4px 0;
    font-size: 0.75em;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 12px;
    box-shadow: none;
    letter-spacing: 0.5px;
}

[data-theme='dark'] .pub-abbr {
    border-color: #46433f;
}

.pub-img {
    width: 100%;
    display: block;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition-fast);
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
}

.pub-img:hover {
    border-color: var(--accent-color);
}

.pub-content-col {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: start;
    padding-top: 0;
}

.pub-title {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.08em;
    display: block;
    margin-bottom: 8px;
    line-height: 1.4;
}

.pub-authors {
    color: var(--text-secondary);
    font-size: 0.98em;
    margin-bottom: 8px;
    line-height: 1.55;
}

.pub-venue {
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.92em;
    margin-bottom: 16px;
}

.pub-status {
    display: inline-block;
    margin-left: 8px;
    padding: 0;
    border: none;
    border-radius: 0;
    color: var(--accent-color);
    font-size: 0.82em;
    font-style: normal;
    font-weight: 500;
}

.pub-links {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.pub-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: none;
    background-color: transparent;
    color: var(--accent-color);
    padding: 0;
    border-radius: 0;
    font-size: 0.86em;
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.pub-links a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

/* PDF Viewer */
.pdf-container {
    width: 100%;
    height: 85vh;
    border: 1px solid var(--border-color);
    margin-top: 20px;
}

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

/* Responsive */
@media (max-width: 768px) {
    .avatar {
        width: 160px;
        height: 160px;
        margin: 0 auto 10px;
    }

    .social-links {
        justify-content: center;
        gap: 18px; 
        margin-top: 12px;
        font-size: 1.45em;
    }

    .nav-links {
        gap: 15px;
    }
    
    .nav-links a {
        font-size: 0.9em;
    }

    .main-content h2 {
        margin-top: 30px;
        font-size: 1.3em;
    }

    .news-date {
        min-width: 82px;
        font-size: 0.86em;
    }

    .pub-item {
        display: block; 
        margin-bottom: 34px;
    }
    
    .pub-img-col {
        display: none;
    }

    .pub-content-col {
        width: 100%;
        padding-top: 0;
    }

    .pub-links {
        gap: 10px 14px;
    }

    .home-header {
        flex-direction: column-reverse; 
        align-items: center; 
        text-align: center;
        gap: 12px;
        margin-top: 32px;
        margin-bottom: 34px;
    }

    .header-text {
        width: 100%;
        flex: auto;
        max-width: 100%;
    }

    .header-avatar-container {
        width: 100%;
        flex: auto;
        max-width: 100%;
        text-align: center;
        margin-bottom: 0;
    }
    
    .header-name {
        font-size: 1.55em;
        margin-bottom: 10px;
    }

    .header-profile {
        font-size: 1em;
    }

    .header-email {
        margin-top: 14px;
        font-size: 0.95em;
    }

    .section-more {
        text-align: left;
        margin-top: -10px;
    }

    .container {
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }
}

/* Blog Tags */
.blog-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 30px;
}

.filter-tag {
    background-color: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-pill);
    padding: 6px 16px;
    font-size: 0.9rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.filter-tag:hover, .filter-tag.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.post-item {
    margin-bottom: 2rem;
    transition: opacity 0.3s ease;
}

.post-title {
    font-size: 1.1em;
    line-height: 1.35;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.post-meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.post-tags {
    margin-left: 10px;
    font-size: 0.85em;
    opacity: 0.8;
}

.post-tags i {
    margin-right: 4px;
}

.post-item.hidden {
    display: none;
}