/* ============================================
   PORTFOLIO STYLES — Vybhav Chaturvedi
   ============================================ */

:root {
    /* Color Palette */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-accent: #06b6d4;

    --color-bg-light: #fafbfc;
    --color-bg-dark: #0f172a;
    --color-bg-dark-alt: #1e293b;

    --color-surface: #ffffff;
    --color-surface-dark: #1e293b;

    --color-text-light: #1e293b;
    --color-text-light-secondary: #475569;
    --color-text-dark: #f1f5f9;
    --color-text-dark-secondary: #94a3b8;

    --color-border-light: #e2e8f0;
    --color-border-dark: #334155;

    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Container */
    --container-max: 1200px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px 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);
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-light);
    background: var(--color-bg-light);
    -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ============================================
   TERMINAL LOGO STYLES
   ============================================ */

/* Blinking Cursor */
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.nav-logo {
    font-family: 'JetBrains Mono', monospace !important;
    font-weight: 700 !important; /* Make it bold like a prompt */
    letter-spacing: -0.03em;
    display: inline-flex;
    align-items: center;
    font-size: 1.5rem;
}

.logo-path {
    color: var(--color-text-light);
}

.logo-tilde {
    color: var(--color-primary);
}

.logo-cursor {
    display: inline-block;
    color: var(--color-primary);
    margin-left: 2px;
    font-weight: 900;
    animation: blink 1s step-end infinite;
    line-height: 1;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    list-style: none;
}

.nav-menu a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-light-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.nav-cta {
    padding: 0.5rem 1rem !important;
    background: var(--color-primary);
    color: white !important;
    border-radius: 6px;
}

.nav-cta:hover {
    background: var(--color-primary-dark);
    color: white !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-light);
    transition: all var(--transition-fast);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
        #f8fafc 0%,
        #e0f2fe 25%,
        #f0f9ff 50%,
        #ecfeff 75%,
        #f8fafc 100%
    );
}

#network-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: calc(80px + var(--space-2xl)) var(--space-xl) var(--space-4xl);
    width: 100%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--space-2xl);
    align-items: center;
}

.hero-text {
    max-width: 600px;
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--space-sm);
}

.hero-terminal {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-bottom: var(--space-sm);
    opacity: 0.8;
}

.hero-name {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-text-light);
    line-height: 1.1;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.hero-title {
    font-family: var(--font-body);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-light);
    margin-bottom: var(--space-xs);
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-text-light-secondary);
    letter-spacing: 0.05em;
    margin-bottom: var(--space-lg);
}

.hero-credentials {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.credential {
    font-size: 0.9rem;
    color: var(--color-text-light-secondary);
}

.hero-tagline {
    font-size: 1.1rem;
    color: var(--color-text-light-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.hero-social {
    display: flex;
    gap: var(--space-md);
}

.hero-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light-secondary);
    border: 1px solid var(--color-border-light);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.hero-social a:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.hero-social svg {
    width: 18px;
    height: 18px;
}

.hero-image {
    position: relative;
}

.image-carousel {
    position: relative;
    width: 100%;
    padding-bottom: 133.33%;
    height: 0;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: var(--color-surface-dark);
}

.carousel-track {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.carousel-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.carousel-slide.active {
    opacity: 1;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.headshot-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light-secondary);
    font-size: 1.1rem;
    position: absolute;
    top: 0;
    left: 0;
}

.carousel-dots {
    position: absolute;
    bottom: var(--space-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--space-sm);
    z-index: 2;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dot.active {
    background: white;
    transform: scale(1.2);
}

.image-decoration {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--color-primary);
    border-radius: 16px;
    z-index: -1;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-light-secondary);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-text-light-secondary), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 1; transform: scaleY(1); }
    50% { opacity: 0.5; transform: scaleY(0.8); }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--color-text-light);
    border: 2px solid var(--color-border-light);
}

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

/* ============================================
   SECTIONS
   ============================================ */

.section {
    padding: var(--space-2xl) 0;
}

.section-dark {
    background: var(--color-bg-dark);
    color: var(--color-text-dark);
}

.section-dark .section-title {
    color: var(--color-text-dark);
}

.section-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--space-2xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.title-number {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 500;
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.about-text {
    grid-column: 1 / -1;
}

.about-lead {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--color-text-light-secondary);
    line-height: 1.8;
}

.about-details {
    display: contents;
}

.about-philosophy h3,
.about-snapshot h3 {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.about-philosophy ul {
    list-style: none;
}

.about-philosophy li {
    padding: var(--space-sm) 0;
    padding-left: var(--space-lg);
    position: relative;
    color: var(--color-text-light-secondary);
    font-size: 1rem;
}

.about-philosophy li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.snapshot-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.snapshot-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.snapshot-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-light-secondary);
}

.snapshot-value {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-light);
    display: block;
    line-height: 1.5;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.project-card {
    background: var(--color-surface-dark);
    border-radius: 12px;
    padding: var(--space-xl);
    border: 1px solid var(--color-border-dark);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-category {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
}

.project-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-dark);
    margin-bottom: var(--space-xs);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 2.5em;
    line-height: 1.3;
}

.project-card.featured {
    border: 1px solid #f59e0b;
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.15);
    background: linear-gradient(to bottom right, var(--color-surface-dark), rgba(245, 158, 11, 0.03));
}

.project-card.featured:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(245, 158, 11, 0.25);
    border-color: #fbbf24;
}

.project-subtitle {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-dark-secondary);
    margin-bottom: var(--space-md);
}

.project-description {
    font-size: 0.95rem;
    color: var(--color-text-dark-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    flex-grow: 1;
}

.project-skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.project-skill {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(6, 182, 212, 0.1);
    color: var(--color-accent);
    border-radius: 4px;
}

.project-results {
    font-size: 0.85rem;
    color: var(--color-text-dark-secondary);
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.03);
    border-radius: 6px;
    margin-bottom: var(--space-lg);
}

.project-results strong {
    color: var(--color-text-dark);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-primary);
    text-decoration: none;
    transition: gap var(--transition-fast);
}

.project-link:hover {
    gap: var(--space-md);
}

.project-link svg {
    width: 16px;
    height: 16px;
}

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

.featured-badge {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    color: #f59e0b;
    background: rgba(245, 158, 11, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
    border: 1px solid rgba(245, 158, 11, 0.3);
    font-weight: 600;
}

.project-category {
    margin-bottom: 0;
}
/* ============================================
   RESEARCH SECTION
   ============================================ */

.research-subsection {
    margin-bottom: var(--space-2xl);
}

.research-subsection:last-child {
    margin-bottom: 0;
}

.subsection-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border-light);
}

.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-lg);
}

.publication-card {
    background: var(--color-surface);
    padding: var(--space-xl);
    border-radius: 12px;
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.publication-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.pub-status {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: var(--space-xs) var(--space-sm);
    border-radius: 4px;
    margin-bottom: var(--space-md);
}

.pub-status.working {
    background: #fef3c7;
    color: #92400e;
}

.pub-status.submitted {
    background: #dbeafe;
    color: #1e40af;
}

.pub-status.published {
    background: #d1fae5;
    color: #065f46;
}

.publication-card h4 {
    font-family: var(--font-display);
    font-size: 1.05rem;
    margin-bottom: var(--space-md);
    line-height: 1.4;
    color: var(--color-text-light);
}

.publication-card p {
    font-size: 0.9rem;
    color: var(--color-text-light-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.pub-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.pub-journal {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-light-secondary);
}

.pub-link {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.pub-link:hover {
    text-decoration: underline;
}

.patent-card {
    background: linear-gradient(135deg, #fefce8 0%, #fef9c3 100%);
    padding: var(--space-xl);
    border-radius: 12px;
    border: 1px solid #fde047;
}

.patent-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: white;
    padding: var(--space-xs) var(--space-md);
    border-radius: 6px;
    margin-bottom: var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: #854d0e;
}

.patent-badge svg {
    width: 16px;
    height: 16px;
}

.patent-card h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin-bottom: var(--space-md);
    line-height: 1.4;
    color: #422006;
}

.patent-card p {
    font-size: 0.9rem;
    color: #713f12;
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.patent-status {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: #854d0e;
}

/* Blog Post Cards */
.blog-posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.blog-post-card {
    background: var(--color-surface);
    border-radius: 12px;
    border: 1px solid var(--color-border-light);
    overflow: hidden;
    text-decoration: none;
    transition: all var(--transition-base);
}

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

.blog-post-img {
    height: 140px;
    background-size: cover;
    background-position: center;
    background-color: #f1f5f9;
    position: relative;
}

.blog-platform-badge {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 4px 8px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    border-radius: 4px;
}

.blog-post-info {
    padding: var(--space-md);
}

.blog-post-info h4 {
    font-family: var(--font-display);
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-sm);
    line-height: 1.4;
}

.blog-read-more {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-primary);
    font-weight: 500;
}

.blog-profiles {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border-light);
    margin-top: var(--space-lg);
}

.blog-profiles > span {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-text-light-secondary);
    margin-right: var(--space-xs);
}

.profile-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
    line-height: 1;
}

.profile-btn.devto {
    background: #1e293b;
    color: white;
    border: 1px solid #0f172a;
}

.profile-btn.medium {
    background: #1e293b;
    color: white;
    border: 1px solid #1e293b;
}

.profile-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.profile-btn svg {
    width: 16px;
    height: 16px;
    opacity: 0.9;
}

/* ============================================
   EXPERIENCE SECTION - Alternating Timeline
   ============================================ */

.timeline-alt {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-xl) 0;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border-dark);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: var(--space-md);
}

.timeline-item.left {
    padding-right: var(--space-xl);
    text-align: right;
}

.timeline-item.right {
    left: 50%;
    padding-left: var(--space-xl);
    text-align: left;
    margin-top: -80px;
}

.timeline-item.left + .timeline-item.left {
    margin-top: -40px;
}

.timeline-item.right + .timeline-item.right {
    margin-top: -40px;
}

.timeline-marker {
    position: absolute;
    top: var(--space-lg);
    width: 14px;
    height: 14px;
    background: var(--color-primary);
    border-radius: 50%;
    border: 3px solid var(--color-bg-dark);
}

.timeline-item.left .timeline-marker {
    right: -7px;
}

.timeline-item.right .timeline-marker {
    left: -7px;
}

.timeline-content {
    background: var(--color-surface-dark);
    padding: var(--space-lg);
    border-radius: 10px;
    border: 1px solid var(--color-border-dark);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    border-color: var(--color-primary);
}

.timeline-period {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    display: block;
    margin-bottom: var(--space-xs);
}

.timeline-content h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--color-text-dark);
    margin-bottom: var(--space-xs);
}

.timeline-org {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-dark-secondary);
    display: block;
    margin-bottom: var(--space-md);
}

.timeline-points {
    list-style: none;
}

.timeline-points li {
    position: relative;
    padding-bottom: var(--space-xs);
    color: var(--color-text-dark-secondary);
    font-size: 0.9rem;
}

.timeline-item.left .timeline-points li {
    padding-right: var(--space-md);
}

.timeline-item.left .timeline-points li::after {
    content: '←';
    position: absolute;
    right: 0;
    color: var(--color-text-dark-secondary);
    opacity: 0.4;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.timeline-item.right .timeline-points li {
    padding-left: var(--space-md);
}

.timeline-item.right .timeline-points li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-text-dark-secondary);
    opacity: 0.4;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

/* ============================================
   SKILLS SECTION
   ============================================ */

.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.skill-group {
    background: var(--color-surface);
    padding: var(--space-xl);
    border-radius: 12px;
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.skill-group:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.skill-group h3 {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border-light);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill-tag {
    font-size: 0.85rem;
    padding: var(--space-xs) var(--space-md);
    background: var(--color-bg-light);
    border-radius: 6px;
    color: var(--color-text-light-secondary);
    transition: all var(--transition-fast);
}

.skill-group:hover .skill-tag {
    background: rgba(37, 99, 235, 0.08);
    color: var(--color-text-light);
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-lead {
    font-size: 1.1rem;
    color: var(--color-text-dark-secondary);
    margin-bottom: var(--space-xl);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg);
    background: var(--color-surface-dark);
    border: 1px solid var(--color-border-dark);
    border-radius: 10px;
    text-decoration: none;
    transition: all var(--transition-base);
}

.contact-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-3px);
}

.contact-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(37, 99, 235, 0.1);
    border-radius: 10px;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.contact-icon svg {
    width: 20px;
    height: 20px;
}

.contact-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-dark);
    margin-top: 4px;
}

.contact-value {
    font-size: 0.8rem;
    color: var(--color-text-dark);
    font-weight: 500;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: var(--color-bg-dark);
    border-top: 1px solid var(--color-border-dark);
    padding: var(--space-xl) 0;
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.footer-left {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.footer-name {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-dark);
}

.footer-title {
    font-size: 0.85rem;
    color: var(--color-text-dark-secondary);
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-text-dark-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-right {
    font-size: 0.85rem;
    color: var(--color-text-dark-secondary);
}

.ds-notation {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    letter-spacing: 0.02em;
    margin-top: var(--space-xs);
}

.ds-tagline {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-primary);
    margin-top: var(--space-lg);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border-light);
    opacity: 0.8;
}

.section-ds-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-accent);
    margin-bottom: var(--space-xl);
    opacity: 0.7;
}

.section-ds-label.light {
    color: var(--color-primary);
}

.ds-code {
    font-family: var(--font-mono);
    color: var(--color-accent);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-xl);
    }

    .hero-text {
        max-width: 100%;
        order: 2;
    }

    .hero-image {
        order: 1;
        max-width: 320px;
        margin: 0 auto;
        width: 100%;
    }

    .image-carousel {
        position: relative;
        width: 100%;
        padding-bottom: 133.33%;
        height: 0;
        border-radius: 16px;
        overflow: hidden;
        box-shadow: var(--shadow-xl);
        background: var(--color-surface-dark);
        display: block !important;
        opacity: 1 !important;
        visibility: visible !important;
    }

    .carousel-track {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
    }

    .carousel-track img {
        width: 100% !important;
        height: 100% !important;
        object-fit: cover !important;
        display: block !important;
    }

    .hero-actions,
    .hero-social {
        justify-content: center;
    }

    .image-decoration {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-border-light);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-name {
        font-size: 2.5rem;
    }

    .hero-title {
        font-size: 1.25rem;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .publications-grid {
        grid-template-columns: 1fr;
    }

    .blog-posts-grid {
        grid-template-columns: 1fr;
    }

    .blog-profiles {
        flex-wrap: wrap;
    }

    /* Timeline mobile - single column */
    .timeline-line {
        left: 20px;
    }

    .timeline-item,
    .timeline-item.left,
    .timeline-item.right {
        width: 100%;
        left: 0;
        padding-left: 50px;
        padding-right: 0;
        text-align: left;
        margin-top: 0;
    }

    .timeline-item.left + .timeline-item.left,
    .timeline-item.right + .timeline-item.right {
        margin-top: 0;
    }

    .timeline-item.left .timeline-marker,
    .timeline-item.right .timeline-marker {
        left: 13px;
        right: auto;
    }

    .timeline-item.left .timeline-points li::after {
        display: none;
    }

    .timeline-item.left .timeline-points li,
    .timeline-item.right .timeline-points li {
        padding-left: var(--space-md);
        padding-right: 0;
    }

    .timeline-item.left .timeline-points li::before {
        content: '→';
        position: absolute;
        left: 0;
        color: var(--color-text-dark-secondary);
        opacity: 0.4;
        font-family: var(--font-mono);
        font-size: 0.75rem;
    }

    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    * {
        animation: none !important;
        transition-duration: 0.01ms !important;
    }
}