/* Presentation Card Image */
.presentation-img {
    width: 70%;
    max-width: 336px;
    max-height: 180px;
    object-fit: cover;
    border-radius: var(--border-radius-md);
    margin-bottom: 1rem;
    background: #222;
    display: block;
    margin-left: auto;
    margin-right: auto;
}
/* Publish Card Image */
.publish-img {
    width: 70%;
    max-width: 336px;
    max-height: 180px;
    object-fit: cover;
    border-radius: var(--border-radius-md);
    margin-bottom: 1rem;
    background: #222;
    display: block;
    margin-left: auto;
    margin-right: auto;
}
/* Articles Links (same as Projects/LT/Publish/Presentation) */
.articles a, .articles-link {
    color: var(--primary-color) !important;
    text-decoration: none;
    transition: color 0.2s, border-bottom 0.2s;
    border-bottom: 1px solid transparent;
}
.articles a:hover, .articles-link:hover {
    color: var(--secondary-color) !important;
    border-bottom: 1px solid var(--secondary-color);
}
/* Prevent header overlap for detail pages */
.publish-detail, .presentation-detail {
    margin-top: 4.5rem;
}
/* Publish & Presentation Links (same as Projects/LT) */
.publish a, .publish-link,
.presentation a, .presentation-link {
    color: var(--primary-color) !important;
    text-decoration: none;
    transition: color 0.2s, border-bottom 0.2s;
    border-bottom: 1px solid transparent;
}
.publish a:hover, .publish-link:hover,
.presentation a:hover, .presentation-link:hover {
    color: var(--secondary-color) !important;
    border-bottom: 1px solid var(--secondary-color);
}
/* Publish & Presentation Cards (same as Projects) */
.publish-grid, .presentation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}
.publish-card, .presentation-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    padding: 2rem 1.5rem 1.5rem 1.5rem;
    transition: box-shadow 0.2s, transform 0.2s;
    display: flex;
    flex-direction: column;
    min-height: 180px;
}
.publish-card:hover, .presentation-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px) scale(1.02);
}
.publish-title, .presentation-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}
.publish-description, .presentation-description {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    margin-bottom: 1rem;
}
.publish-meta, .presentation-meta {
    margin-top: auto;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    text-align: right;
}
body {
    background: var(--bg-primary);
    color: var(--text-primary);
}
/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-color: #00d4ff;
    --secondary-color: #7c3aed;
    --accent-color: #ff006e;
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-card: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --border-color: #333333;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    
    /* Borders */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
}
/* Background Animation */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    animation: float 15s infinite linear;
    opacity: 0.6;
}

.particle:nth-child(1) {
    left: 10%;
    animation-delay: 0s;
    animation-duration: 20s;
}

.particle:nth-child(2) {
    left: 30%;
    animation-delay: 5s;
    animation-duration: 18s;
}

.particle:nth-child(3) {
    left: 50%;
    animation-delay: 10s;
    animation-duration: 22s;
}

.particle:nth-child(4) {
    left: 70%;
    animation-delay: 15s;
    animation-duration: 19s;
}

.particle:nth-child(5) {
    left: 90%;
    animation-delay: 8s;
    animation-duration: 25s;
}

@keyframes float {
    0% {
        transform: translateY(100vh) translateX(0px);
    }
    100% {
        transform: translateY(-100vh) translateX(100px);
    }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-4) var(--spacing-6);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.nav-brand a {
    color: inherit;
    text-decoration: none;
    display: flex;
    align-items: center;
}

.brand-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-cursor {
    animation: blink 1s infinite;
    margin-left: 2px;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-6);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 400px;
    padding-bottom: 2rem;
    margin-bottom: var(--spacing-20);
    /* Collapse animation setup */
    max-height: 1200px;
    overflow: hidden;
}

.hero-cover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 320px;
    overflow: hidden;
    z-index: 1;
    transition: opacity 0.8s cubic-bezier(0.77,0,0.18,1), transform 0.8s cubic-bezier(0.77,0,0.18,1);
    opacity: 1;
    transform: none;
}

.cover-img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    object-position: center;
    display: block;
    filter: brightness(0.7) blur(1px);
}

.hero-content {
    padding-top: 120px;
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    transition: opacity 0.8s cubic-bezier(0.77,0,0.18,1), transform 0.8s cubic-bezier(0.77,0,0.18,1);
    opacity: 1;
    transform: none;
}
.hero.is-collapsed .hero-content,
.hero.is-collapsed .hero-cover {
    opacity: 0;
    transform: translateY(-40px);
}

 .profile-img-wrapper {
    position: relative;
    z-index: 3;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-6);
}

.profile-img {
    width: 128px;
    height: 128px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
    box-shadow: 0 4px 24px rgba(0,0,0,0.25);
    background: var(--bg-card);
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-6);
    line-height: 1.1;
}

.typing-text {
    background: linear-gradient(135deg, var(--text-primary), var(--primary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-4);
    font-weight: 500;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    position: static !important;
    bottom: auto !important;
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--border-radius-lg);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
    font-size: var(--font-size-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    background: var(--bg-card);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Sections */
section {
    padding: var(--spacing-20) 0;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-12);
    background: linear-gradient(135deg, var(--text-primary), var(--primary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-8);
}

.skills h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
    justify-content: center;
}

.skill-tag {
    background: var(--bg-card);
    color: var(--text-primary);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-8);
    margin-top: var(--spacing-8);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-6);
    transition: all 0.3s ease;
}

.project-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-4);
}

.project-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

.project-links {
    display: flex;
    gap: var(--spacing-2);
}

.project-link {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    transition: color 0.3s ease;
    text-decoration: none;
}

.project-link:hover {
    color: var(--primary-color);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-4);
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.projects a {
  color: #00e0ff !important;
  font-weight: 700;
  text-decoration: underline;
  transition: color 0.2s;
}

.tech-tag {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border: 1px solid var(--border-color);
}

/* LT Section */
.lt a {
  color: #00e0ff !important;
  font-weight: 700;
  text-decoration: underline;
  transition: color 0.2s;
}

.lt-section a {
  color: #00e0ff !important;
  font-weight: 700;
  text-decoration: underline;
  transition: color 0.2s;
}
.lt-section a:hover, .lt-section a:focus {
  color: #ff006e !important;
}

.lt-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
}

.lt-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-6);
    text-align: center;
    transition: all 0.3s ease;
}

.lt-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
}

.lt-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-4);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
}

.lt-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-3);
    color: var(--text-primary);
}

.lt-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-4);
    line-height: 1.6;
}

.lt-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-4);
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--border-color);
}

.lt-date {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.lt-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: color 0.3s ease;
}

.lt-link:hover {
    color: var(--secondary-color);
}


/* Contact Section */
.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-8);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-6);
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    transition: all 0.3s ease;
    background: var(--bg-card);
}

.contact-link:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Loading */
.loading {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: var(--spacing-8) 0;
}

.markdown-content {
    color: var(--text-secondary);
    line-height: 1.7;
}

.markdown-content h2 {
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    margin: var(--spacing-6) 0 var(--spacing-4) 0;
}

.markdown-content h3 {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    margin: var(--spacing-4) 0 var(--spacing-3) 0;
}

.markdown-content ul {
    margin-left: var(--spacing-6);
    margin-bottom: var(--spacing-4);
}

.markdown-content li {
    margin-bottom: var(--spacing-2);
}

.markdown-content strong {
    color: var(--text-primary);
}

.markdown-content a {
    color: #00e0ff !important;
    background: none;
    -webkit-background-clip: initial;
    -webkit-text-fill-color: initial;
    background-clip: initial;
    text-decoration: underline;
    font-weight: 600;
    transition: color 0.2s, box-shadow 0.2s, background 0.2s;
    border-radius: 4px;
    padding: 0 2px;
}

 .markdown-content a:hover, .markdown-content a:focus {
    color: #ff006e !important;
    background: none;
    -webkit-background-clip: initial;
    -webkit-text-fill-color: initial;
    background-clip: initial;
    text-decoration: underline;
    box-shadow: 0 2px 8px rgba(255,0,110,0.12);
    background-color: rgba(255,0,110,0.08);
}

/* Project and LT Detail Pages */
.project-detail, .lt-detail {
    padding-top: 120px;
    min-height: 100vh;
}

.project-header, .lt-header {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.project-detail .project-title, .lt-detail .lt-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-6);
    background: linear-gradient(135deg, var(--text-primary), var(--primary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.project-meta, .lt-links {
    display: flex;
    gap: var(--spacing-4);
    justify-content: center;
    margin-bottom: var(--spacing-6);
    flex-wrap: wrap;
}

.project-content, .lt-content {
    max-width: 800px;
    margin: 0 auto var(--spacing-12);
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--text-secondary);
}

.project-content h1, .lt-content h1 {
    color: var(--text-primary);
    font-size: var(--font-size-3xl);
    margin: var(--spacing-8) 0 var(--spacing-4) 0;
}

.project-content h2, .lt-content h2 {
    color: var(--text-primary);
    font-size: var(--font-size-2xl);
    margin: var(--spacing-6) 0 var(--spacing-4) 0;
}

.project-content h3, .lt-content h3 {
    color: var(--primary-color);
    font-size: var(--font-size-xl);
    margin: var(--spacing-4) 0 var(--spacing-3) 0;
}

.project-content pre, .lt-content pre {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-4);
    overflow-x: auto;
    margin: var(--spacing-4) 0;
}

.project-content code, .lt-content code {
    background: var(--bg-card);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    color: var(--primary-color);
}

.project-content pre code, .lt-content pre code {
    background: none;
    padding: 0;
}

.project-nav, .lt-nav {
    text-align: center;
    margin-top: var(--spacing-12);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-8) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        padding: var(--spacing-3) var(--spacing-4);
        flex-direction: column;
        gap: var(--spacing-3);
    }
    
    .nav-menu {
        gap: var(--spacing-4);
    }
    
    .hero {
        padding-top: 120px;
        min-height: auto;
        padding-bottom: var(--spacing-12);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
    
    section {
        padding: var(--spacing-12) 0;
    }
    
    .project-detail, .lt-detail {
        padding-top: 140px;
    }
    
    .project-meta, .lt-links {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-3);
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .nav {
        padding: var(--spacing-2) var(--spacing-3);
    }
    
    .project-detail .project-title, .lt-detail .lt-title {
        font-size: var(--font-size-3xl);
    }

}