/* Geek Portfolio Styles */
/* Modern, dark-themed portfolio with sidebar navigation */

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

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent-primary: #58a6ff;
    --accent-secondary: #7ee787;
    --accent-tertiary: #d29922;
    --accent-error: #f85149;
    --border-color: #30363d;
    --font-mono: 'Fira Code', 'Consolas', 'Monaco', 'Courier New', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    
    /* Avatar Style Options */
    --avatar-border-radius: 12px; /* Change to 50% for circle, 12px for rounded square */
    --avatar-border: none; /* Change to "3px solid var(--accent-primary)" for border */
    --avatar-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Main Layout */
.main-container {
    display: flex;
    min-height: 100vh;
    max-width: 1600px;
    margin: 0 auto;
}

/* Left Sidebar - Fixed */
.sidebar {
    width: 300px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: 30px 20px;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

/* Right Content Area */
.content-area {
    flex: 1;
    margin-left: 300px; /* Add margin for fixed sidebar */
    padding: 30px 40px;
    overflow-y: auto;
}

/* Mobile Top Bar - hidden by default */
.mobile-topbar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1200;
    padding: 0 16px;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

.mobile-topbar-name {
    font-size: 16px;
    color: var(--accent-secondary);
    font-weight: 600;
}

.mobile-topbar-menu {
    position: relative;
}

.mobile-topbar-controls {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.mobile-lang-switch {
    position: relative;
}

.mobile-lang-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 32px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0 10px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
}

.mobile-lang-panel {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    display: none;
    min-width: 90px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 6px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.35);
    z-index: 1300;
}

.mobile-lang-panel.open {
    display: block;
}

.mobile-lang-panel .lang-btn {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: 8px 10px;
    border-radius: 8px;
    font-size: 13px;
    cursor: pointer;
    text-align: left;
}

.mobile-lang-panel .lang-btn:hover {
    background-color: var(--bg-tertiary);
}

.mobile-lang-panel .lang-btn.active {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
}

.mobile-menu-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 10px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
}

.mobile-menu-icon {
    display: inline-block;
    width: 18px;
    height: 12px;
    background: linear-gradient(
        to bottom,
        var(--text-primary) 0,
        var(--text-primary) 2px,
        transparent 2px,
        transparent 5px,
        var(--text-primary) 5px,
        var(--text-primary) 7px,
        transparent 7px,
        transparent 10px,
        var(--text-primary) 10px,
        var(--text-primary) 12px
    );
}

.mobile-menu-panel {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    min-width: 190px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 8px;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.35);
    display: none;
}

.mobile-menu-panel.open {
    display: block;
}

.mobile-menu-link {
    display: block;
    padding: 10px 12px;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 8px;
    font-size: 14px;
}

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

/* Responsive Layout */
@media (min-width: 1401px) {
    /* Large screens - centered */
    .main-container {
        margin: 0 auto;
        box-shadow: 0 0 50px rgba(0, 0, 0, 0.5);
    }
}

@media (max-width: 1400px) {
    /* Medium screens - full width */
    .main-container {
        max-width: 100%;
        margin: 0;
        box-shadow: none;
    }
}

@media (max-width: 1024px) {
    /* Tablet and below - sidebar becomes top navigation */
    .main-container {
        flex-direction: column;
    }
    
    .sidebar {
        position: relative;
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
    }
    
    .content-area {
        margin-left: 0;
        padding: 20px;
    }
    
    .profile-section {
        display: flex;
        align-items: center;
        gap: 20px;
        text-align: left;
    }
    
    .profile-avatar {
        width: 80px;
        height: 80px;
        margin-bottom: 0;
    }
    
    .nav-tabs {
        flex-direction: row;
        overflow-x: auto;
        gap: 10px;
    }
    
    .nav-tab {
        flex-shrink: 0;
    }
}

/* 竖屏优化 - 针对手机竖屏模式 */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }

    .mobile-topbar {
        display: flex;
    }

    .content-area {
        margin-left: 0;
        padding: 4px;
        padding-top: 72px;
        -webkit-overflow-scrolling: touch;
    }

    .content-section {
        padding: 12px 4px;
        min-height: auto;
    }

    .terminal-title-3d {
        font-size: 24px;
        letter-spacing: 2px;
    }

    .section-header {
        margin-bottom: 30px;
        padding-bottom: 20px;
    }

    .main-container {
        will-change: transform;
        transform: translateZ(0);
    }

    .publication-item,
    .skill-item,
    .education-tag,
    .award-item {
        padding: 15px;
        margin-bottom: 12px;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 10px;
    }
}

/* Profile Section in Sidebar */
.profile-section {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.profile-avatar {
    width: 150px;
    height: 150px;
    border-radius: var(--avatar-border-radius);
    border: var(--avatar-border);
    object-fit: cover;
    margin-bottom: 15px;
    transition: all 0.3s ease;
    box-shadow: var(--avatar-shadow);
}

.profile-avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.profile-name {
    font-size: 22px;
    color: var(--accent-secondary);
    margin-bottom: 5px;
}

.profile-title {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.profile-location {
    font-size: 12px;
    color: var(--accent-tertiary);
}

/* Navigation Tabs in Sidebar */
.nav-tabs {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-bottom: 30px;
}

.nav-tab {
    padding: 12px 15px;
    background-color: transparent;
    border: 1px solid transparent;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.nav-tab:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

.nav-tab.active {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
}

.nav-tab-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: var(--bg-tertiary);
    border-radius: 6px;
    padding: 4px;
    transition: all 0.2s ease;
}

.nav-tab.active .nav-tab-icon {
    background-color: var(--bg-primary);
}

.nav-tab-icon svg {
    width: 16px;
    height: 16px;
    fill: var(--text-secondary);
}

.nav-tab.active .nav-tab-icon svg {
    fill: var(--accent-primary);
}

.nav-tab:hover .nav-tab-icon svg {
    fill: var(--text-primary);
}

/* Social Links in Sidebar */
.social-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 13px;
    transition: all 0.2s ease;
}

.social-link:hover {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
    transform: translateX(5px);
}

.social-link-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: var(--accent-primary);
    border-radius: 6px;
    padding: 4px;
    transition: all 0.2s ease;
}

.social-link:hover .social-link-icon {
    background-color: var(--bg-primary);
}

.social-link-icon svg {
    width: 16px;
    height: 16px;
    fill: var(--bg-primary);
}

.social-link:hover .social-link-icon svg {
    fill: var(--accent-primary);
}

/* Content Sections */
.content-section {
    padding: 40px 50px;
    min-height: 100vh;
    position: relative;
    animation: fadeIn 0.3s ease;
}

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

/* Modern Section Divider */
.content-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--accent-primary) 20%, 
        var(--accent-secondary) 50%, 
        var(--accent-primary) 80%, 
        transparent 100%);
    opacity: 0.6;
    box-shadow: 0 0 10px var(--accent-primary);
}

/* Section Header - Terminal 3D Style */
.section-header {
    margin-bottom: 50px;
    padding-bottom: 30px;
    position: relative;
    font-family: var(--font-mono);
}

.section-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, 
        var(--accent-primary) 0%, 
        transparent 100%);
}

.section-header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, 
        var(--accent-primary), 
        var(--accent-secondary));
    border-radius: 2px;
}

/* Terminal Title Image */
.terminal-title-img {
    height: 50px;
    width: auto;
    margin-bottom: 25px;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.5)) drop-shadow(0 0 15px rgba(126, 231, 135, 0.4));
    transition: all 0.3s ease;
}

.terminal-title-img:hover {
    filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.6)) drop-shadow(0 0 20px rgba(126, 231, 135, 0.6));
    transform: translateY(-2px);
}

/* 3D Terminal Title Text - Retro Terminal Style */
.terminal-title-3d {
    font-family: 'Fira Code', 'Consolas', 'Monaco', monospace;
    font-size: 36px;
    font-weight: 900;
    color: #00ff41;
    margin: 0 0 30px 0;
    position: relative;
    display: inline-block;
    /* Multiple 3D layers for depth */
    text-shadow: 
        /* 3D depth layers - darker green for depth */
        0 1px 0 #008020,
        0 2px 0 #008020,
        0 3px 0 #008020,
        0 4px 0 #008020,
        0 5px 0 #008020,
        0 6px 0 #008020,
        0 7px 0 #008020,
        0 8px 0 #008020,
        0 9px 0 #008020,
        0 10px 0 #008020,
        0 11px 0 #008020,
        0 12px 0 #008020,
        0 13px 0 #008020,
        0 14px 0 #008020,
        0 15px 0 #008020,
        /* Drop shadow */
        0 16px 20px rgba(0, 0, 0, 0.5),
        /* CRT glow effect - multiple layers */
        0 0 10px #00ff41,
        0 0 20px #00ff41,
        0 0 30px #00ff41,
        0 0 40px #008020,
        0 0 50px #008020;
    /* Slight perspective for 3D effect */
    transform: perspective(500px) rotateX(5deg);
    transition: all 0.3s ease;
    letter-spacing: 3px;
}

.terminal-title-3d:hover {
    transform: perspective(500px) rotateX(3deg) translateY(-5px);
    text-shadow: 
        /* 3D depth layers */
        0 1px 0 #008020,
        0 2px 0 #008020,
        0 3px 0 #008020,
        0 4px 0 #008020,
        0 5px 0 #008020,
        0 6px 0 #008020,
        0 7px 0 #008020,
        0 8px 0 #008020,
        0 9px 0 #008020,
        0 10px 0 #008020,
        0 11px 0 #008020,
        0 12px 0 #008020,
        0 13px 0 #008020,
        0 14px 0 #008020,
        0 15px 0 #008020,
        /* Enhanced drop shadow */
        0 16px 25px rgba(0, 0, 0, 0.6),
        /* Enhanced CRT glow */
        0 0 15px #00ff41,
        0 0 25px #00ff41,
        0 0 35px #00ff41,
        0 0 45px #008020,
        0 0 55px #008020,
        0 0 65px #008020;
}

/* Terminal title with command prompt */
.terminal-title-3d::before {
    content: '> ';
    color: #00ffff;
    margin-right: 15px;
    text-shadow: 
        0 0 10px #00ffff,
        0 0 20px #00ffff;
}

/* Terminal title underline effect */
.terminal-title-3d::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #00ff41, #00ffff, #00ff41);
    box-shadow: 
        0 0 10px #00ff41,
        0 0 20px #00ff41,
        0 0 30px #00ff41;
    border-radius: 2px;
}

/* New Terminal Section Header Style */
.terminal-section-header {
    background: transparent; /* 透明背景 */
    border-radius: 0; /* 去掉圆角 */
    padding: 0; /* 去掉内边距 */
    border-left: none; /* 去掉左边框 */
    margin-bottom: 30px;
}

/* ASCII Art Title */
.ascii-title {
    font-family: 'Fira Code', 'Consolas', monospace;
    white-space: pre;
    font-size: 14px;
    line-height: 1.15;
    color: #58a6ff;
    text-shadow: 
        0 0 10px rgba(88, 166, 255, 0.4),
        0 0 20px rgba(88, 166, 255, 0.2);
    margin: 20px 0;
    overflow-x: auto;
    background: transparent;
    padding: 0;
    border: none;
    text-align: center; /* 居中显示 */
    margin-left: auto;
    margin-right: auto;
}

/* Terminal subtitle */
.terminal-subtitle {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
    color: #8b949e;
    margin-top: 15px;
    padding-top: 0;
    border-top: none;
    text-align: center; /* 居中显示 */
}

.section-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 20px 0 0 0;
    font-weight: 400;
    letter-spacing: 0.5px;
    font-family: var(--font-mono);
    opacity: 0.8;
    position: relative;
    padding-left: 20px;
}

.section-subtitle::before {
    content: '// ';
    color: var(--accent-primary);
    position: absolute;
    left: 0;
}

/* About Section */
/* About Section */
.about-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 2px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        var(--accent-primary) 20%, 
        var(--accent-secondary) 50%, 
        var(--accent-primary) 80%, 
        transparent 100%);
    opacity: 0.6;
    box-shadow: 0 0 10px var(--accent-primary);
}

.about-content {
    line-height: 1.8;
    font-family: var(--font-sans);
    position: relative;
}

.about-content p {
    margin-bottom: 25px;
    text-align: justify;
    position: relative;
    padding-left: 20px;
}

.intro-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(88, 166, 255, 0.05) 100%);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-primary);
    border-radius: 8px;
    padding: 20px 25px;
    margin-bottom: 30px;
    position: relative;
}

.intro-card:hover {
    border-left-color: var(--accent-secondary);
    box-shadow: 0 4px 20px rgba(88, 166, 255, 0.1);
}

.intro-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    font-family: var(--font-mono);
    font-size: 14px;
}

.intro-icon {
    color: var(--accent-primary);
    font-weight: bold;
}

.intro-title {
    color: var(--accent-secondary);
}

.intro-text {
    color: var(--text-primary);
    line-height: 1.8;
    margin: 0 0 20px 0 !important;
    padding-left: 0 !important;
}

.intro-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.intro-tag {
    background: var(--bg-primary);
    color: var(--accent-primary);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    border: 1px solid var(--border-color);
}

.intro-tag:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.about-content p:not(.intro-text)::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
}

.about-content h3 {
    color: var(--accent-primary);
    margin: 40px 0 20px 0;
    font-size: 18px;
    font-weight: 600;
    position: relative;
    padding-left: 20px;
}

.about-content h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--accent-secondary);
    border-radius: 50%;
}

.about-content h3::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
}

.about-content h3::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
}

.about-content ul {
    margin: 20px 0;
    padding-left: 30px;
}

.about-content li {
    margin-bottom: 12px;
    line-height: 1.6;
    position: relative;
}

.about-content li::before {
    content: '▸';
    position: absolute;
    left: -20px;
    color: var(--accent-secondary);
    font-size: 12px;
}

.mobile-about-header {
    display: none;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

/* Education Tags */
.education-tags {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.education-tag {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px 20px;
    transition: all 0.2s ease;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.education-tag:hover {
    border-color: var(--accent-primary);
    transform: translateX(5px);
}

/* Awards List */
.awards-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
}

.award-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.2s ease;
}

.award-item:hover {
    border-color: var(--accent-primary);
    transform: translateX(5px);
}

.award-icon {
    font-size: 20px;
    width: 32px;
    text-align: center;
}

.award-content {
    flex: 1;
}

.award-title {
    font-size: 13px;
    color: var(--text-primary);
    line-height: 1.5;
}

.education-content {
    flex: 1;
}

.education-logos {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: 20px;
}

.education-logo {
    height: 120px;
    width: auto;
    object-fit: contain;
    opacity: 0.8;
}

.education-logo:hover {
    opacity: 1;
}

.publication-title {
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 5px;
    line-height: 1.4;
}

.publication-authors {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 5px;
}

.author-highlight {
    color: var(--accent-primary);
    font-weight: 600;
}

.publication-venue {
    color: var(--text-secondary);
    font-size: 14px;
    font-style: italic;
    margin-bottom: 5px;
}

.education-school {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 15px;
    margin-bottom: 5px;
    font-style: italic;
}

.education-field {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 5px;
}

.education-note {
    color: var(--text-secondary);
    font-size: 13px;
    font-style: italic;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

/* Publications Section */
.publications-content h3 {
    color: var(--accent-primary);
    margin: 40px 0 20px 0;
    font-size: 18px;
    font-weight: 600;
    position: relative;
    padding-left: 20px;
}

.publications-content h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--accent-secondary);
    border-radius: 50%;
}

.publications-content h3::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
}

.publications-list {
    list-style: none;
    padding: 0;
    margin: 0 0 30px 0;
}

.publication-item {
    padding: 18px;
    margin-bottom: 15px;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-radius: 12px;
    border-left: 4px solid var(--accent-primary);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.publication-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 4px 0 0 4px;
}

.publication-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        rgba(88, 166, 255, 0.1) 0%, 
        transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.publication-item:hover {
    transform: translateX(10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.publication-item:hover::after {
    opacity: 1;
}

.publication-title {
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 8px;
    line-height: 1.5;
    position: relative;
    z-index: 1;
}

.publication-venue {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 5px;
    position: relative;
    z-index: 1;
}

.publication-meta {
    font-size: 12px;
    color: var(--accent-secondary);
    font-weight: 500;
    position: relative;
    z-index: 1;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.skill-item {
    padding: 15px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.skill-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.skill-name {
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 14px;
}

.skill-level {
    height: 6px;
    background-color: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 3px;
    transition: width 0.5s ease;
}

/* Projects Section */
.projects-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.project-card {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    border-color: var(--accent-primary);
}

.project-content {
    padding: 20px;
}

.project-title {
    font-size: 18px;
    color: var(--accent-secondary);
    margin-bottom: 5px;
    font-weight: 600;
}

.project-team {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-style: italic;
}

.project-team strong {
    color: var(--accent-primary);
    font-style: normal;
}

.project-details {
    list-style: none;
    padding: 0;
    margin: 0 0 15px 0;
}

.project-details li {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 8px;
    padding-left: 15px;
    position: relative;
}

.project-details li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 15px;
}

/* Contact Section */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.contact-item {
    padding: 20px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.contact-icon {
    font-size: 24px;
    margin-bottom: 10px;
}

.contact-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.contact-value {
    font-size: 14px;
    color: var(--text-primary);
}

/* Language Switch */
.lang-switch {
    display: flex;
    gap: 8px;
    padding: 10px 0;
    margin: 10px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.lang-btn {
    flex: 1;
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.lang-btn.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-primary);
}

/* Footer in Sidebar */
.sidebar-footer {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Footer in Content Area */
.footer {
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Skills Section */
.skills-content h3 {
    color: var(--accent-primary);
    margin: 40px 0 20px 0;
    font-size: 18px;
    font-weight: 600;
    position: relative;
    padding-left: 15px;
}

.skills-content h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background-color: var(--accent-primary);
    border-radius: 50%;
}

.skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
}

.skill-tag {
    display: inline-block;
    padding: 6px 12px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.skill-tag:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.skills-content h3::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
}

/* Projects Section */
.projects-content > h3 {
    color: var(--accent-primary);
    margin: 40px 0 15px 0;
    font-size: 18px;
    font-weight: 600;
    position: relative;
    padding-left: 20px;
}

.projects-content > h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--accent-secondary);
    border-radius: 50%;
}

.projects-content > h3::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
}

.project-card h3 {
    color: var(--accent-primary);
    margin: 0 0 15px 0;
    font-size: 18px;
    font-weight: 600;
}

.project-tags {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.tags-group {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
    margin-top: 15px;
    margin-bottom: 25px;
}

.tags-group .tag-combined:nth-child(-n+3) {
    grid-column: span 2;
}

.tags-group .tag-combined:nth-child(n+4) {
    grid-column: span 3;
}

.tag-combined {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 16px;
    transition: all 0.2s ease;
}

.tag-combined:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.tag-main {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 14px;
    display: block;
    margin-bottom: 8px;
}

.tag-detail {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 500;
}

.tag-highlight {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
}

.tag-link {
    background: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.tag-link:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.tag-description {
    color: var(--text-secondary);
    font-size: 12px;
    margin-top: 8px;
    margin-bottom: 0;
    line-height: 1.5;
}

/* Contact Section */
.contact-content h3 {
    color: var(--accent-primary);
    margin: 40px 0 20px 0;
    font-size: 18px;
    font-weight: 600;
    position: relative;
    padding-left: 20px;
}

.contact-content h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--accent-secondary);
    border-radius: 50%;
}

.contact-content h3::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
}

.contact-content p {
    margin-bottom: 20px;
    line-height: 1.6;
    text-align: justify;
    position: relative;
    padding-left: 15px;
}

.contact-content p::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
}

/* Contact Info */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 18px;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-radius: 12px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-primary);
    border-radius: 4px 0 0 4px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateX(8px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.contact-item:hover::before {
    background: var(--accent-secondary);
    width: 6px;
}

.contact-item:hover .contact-label,
.contact-item:hover .contact-value {
    color: var(--accent-primary);
}

.contact-item:hover .contact-icon {
    background: var(--accent-primary);
    color: var(--bg-primary);
    transform: scale(1.1);
}

.contact-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-primary);
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.contact-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-value {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 400;
}

.contact-value a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.contact-value a:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 900px) {
    .sidebar {
        width: 250px;
    }
    
    .content-area {
        margin-left: 250px;
        padding: 20px;
    }
}

@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .content-area {
        margin-left: 0;
    }
    
    .nav-tabs {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-tab {
        padding: 8px 12px;
        font-size: 12px;
    }
    
    .social-links {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
    }
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* Selection Color */
::selection {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

/* Focus Outline */
:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Mobile spacing overrides (placed last to win cascade) */
@media (max-width: 768px) and (orientation: portrait) {
    .content-area {
        padding: 4px;
        padding-top: 72px;
    }

    .content-section {
        padding: 12px 4px;
    }
}

@media (max-width: 768px) {
    .content-area {
        padding: 4px;
        padding-top: 56px;
    }

    .content-section {
        padding: 12px 4px;
    }

    .terminal-title-3d,
    .terminal-title-img {
        display: none;
    }

    .ascii-title {
        display: none;
    }

    .terminal-subtitle {
        display: none;
    }

    .terminal-section-header {
        display: none;
    }

    .terminal-section-header,
    .section-header {
        margin-bottom: 16px;
        padding-bottom: 0;
        border: none;
    }

    .terminal-section-header::before,
    .terminal-section-header::after,
    .section-header::before,
    .section-header::after {
        content: none;
    }

    .content-section::before {
        content: none;
    }

    .about-content .intro-tags {
        flex-direction: column;
        gap: 6px;
    }

    .about-content .intro-tag {
        display: block;
        width: 100%;
        text-align: left;
    }

    .about-content .tags-group {
        display: grid;
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .about-content .tags-group .tag-combined,
    .about-content .tags-group .tag-combined:nth-child(-n+3),
    .about-content .tags-group .tag-combined:nth-child(n+4) {
        grid-column: 1 / -1;
    }

    .about-content .tag-detail {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 6px;
    }

    .education-logos {
        display: none;
    }
}

@media (max-width: 768px) {
    .mobile-about-header {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 16px;
    }

    .mobile-about-avatar {
        width: 112px;
        height: 112px;
        border-radius: 10px;
        object-fit: cover;
        box-shadow: var(--avatar-shadow);
    }

    .mobile-about-info {
        display: flex;
        flex-direction: column;
        gap: 4px;
        min-width: 0;
    }

    .mobile-about-name {
        font-size: 16px;
        color: var(--accent-secondary);
        margin: 0;
    }

    .mobile-about-title {
        font-size: 12px;
        color: var(--text-secondary);
        margin: 0;
    }

    .mobile-about-location {
        font-size: 11px;
        color: var(--accent-tertiary);
        margin: 0;
    }

    .mobile-about-socials {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        font-size: 12px;
    }

    .mobile-about-socials a {
        color: var(--accent-primary);
        text-decoration: none;
        border: 1px solid var(--border-color);
        padding: 4px 10px;
        border-radius: 999px;
        background: var(--bg-tertiary);
    }
}