:root {
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-hover: #4f46e5;
    --border-color: #e2e8f0;
    --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);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent-primary: #818cf8;
    --accent-secondary: #a78bfa;
    --accent-hover: #6366f1;
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

/* ============================================
   GLOBAL RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

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

a:hover {
    color: var(--accent-hover);
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

/* Enhanced section titles with better visual hierarchy */
.section-title {
    font-size: var(--font-size-3xl);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 2px;
}

/* ============================================
   NAVIGATION BAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--accent-primary);
    transition: transform 0.2s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: color 0.2s ease;
}

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

.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background: var(--accent-primary);
    color: white;
    transform: rotate(20deg);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ============================================
   HERO SECTION
   Content-forward with strong visual hierarchy
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
    overflow: hidden;
}

/* Subtle background pattern */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 1px 1px, var(--border-color) 1px, transparent 0);
    background-size: 40px 40px;
    opacity: 0.3;
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -1px;
}

.highlight {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-muted);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
    font-weight: 400;
    max-width: 600px;
    position: relative;
}

.hero-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

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

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

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

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

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

.btn-outline:hover {
    background: var(--accent-primary);
    color: white !important;
    transform: translateY(-2px);
}

.btn-primary:hover,
.btn-secondary:hover {
    color: white !important;
}

.hero-image {
    animation: fadeIn 1s ease;
}

.profile-photo {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 4px solid var(--accent-primary);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
}

.profile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ============================================
   ABOUT SECTION
   Enhanced for better readability
   ============================================ */
.about {
    background-color: var(--bg-secondary);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

/* First paragraph gets emphasis */
.about-text p:first-child {
    font-size: calc(var(--font-size-lg) * 1.1);
    font-weight: 500;
    color: var(--text-primary);
}

/* ============================================
   PROJECTS SECTION
   Enhanced for better content visibility
   ============================================ */
.projects {
    background-color: var(--bg-primary);
}

/* Project Filters */
.project-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-family);
}

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

.filter-btn.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border-color: transparent;
}

.project-card.hidden {
    display: none;
}

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

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

/* Improved hover effect - more professional */
.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

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

.project-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-2xl);
    transition: transform 0.3s ease;
}

.project-card:hover .project-icon {
    transform: scale(1.1) rotate(5deg);
}

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

.project-links a {
    color: var(--text-muted);
    font-size: var(--font-size-xl);
    transition: all 0.2s ease;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
}

.project-links a:hover {
    color: white;
    background: var(--accent-primary);
    transform: scale(1.1);
}

.project-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    line-height: 1.3;
}

/* NEW: Impact badge for measurable results */
.project-impact {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    width: fit-content;
}

.project-impact i {
    font-size: var(--font-size-sm);
}

/* Project timeline badge */
.project-timeline {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    width: fit-content;
}

.project-timeline i {
    font-size: var(--font-size-sm);
    color: var(--accent-primary);
}

.project-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 5.5rem;
}

.project-screenshot {
    width: 100%;
    height: 250px;
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    cursor: zoom-in;
    position: relative;
}

.project-screenshot img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.project-screenshot:hover img {
    transform: scale(1.02);
}

.project-screenshot:hover::after {
    content: '🔍 Click to view full size';
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.318);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    pointer-events: none;
}

/* Screenshot modal */
.screenshot-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 10000;
    justify-content: center;
    align-items: center;
    cursor: zoom-out;
    animation: fadeIn 0.2s ease;
}

.screenshot-modal.active {
    display: flex;
}

.screenshot-modal img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    cursor: default;
}

.screenshot-modal-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.screenshot-modal-close:hover {
    transform: scale(1.2);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.project-card:hover .project-screenshot img {
    transform: scale(1.02);
}

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

.tech-tag {
    background: transparent;
    color: var(--accent-primary);
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border: none;
    transition: all 0.2s ease;
}

.tech-tag:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
}

.project-learning {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--accent-primary);
    line-height: 1.6;
}

.project-learning strong {
    color: var(--accent-primary);
    display: block;
    margin-bottom: 0.3rem;
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */
.experience {
    background-color: var(--bg-secondary);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-left: var(--spacing-lg);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-xl);
    padding-left: var(--spacing-xl);
}

.timeline-dot {
    position: absolute;
    left: -8px;
    top: 8px;
    width: 18px;
    height: 18px;
    background: var(--accent-primary);
    border: 3px solid var(--bg-secondary);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--bg-secondary);
}

.timeline-content {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.timeline-content:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(5px);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.timeline-header h3 {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
}

.timeline-date {
    font-size: var(--font-size-sm);
    color: var(--accent-primary);
    font-weight: 600;
    background: var(--bg-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
}

.timeline-company {
    color: var(--text-muted);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.timeline-company i {
    color: var(--accent-primary);
}

/* NEW: Experience type badges */
.timeline-type {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 700;
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timeline-type-research {
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

.timeline-type-teaching {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-secondary);
    border: 1px solid var(--accent-secondary);
}

.timeline-type-engineering {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid #10b981;
}

.timeline-type-leadership {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
    border: 1px solid #f59e0b;
}

.timeline-details {
    list-style: none;
    padding-left: 0;
}

.timeline-details li {
    padding-left: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    position: relative;
    line-height: 1.6;
}

.timeline-details li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills {
    background-color: var(--bg-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.skill-category:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.skill-category-header i {
    font-size: var(--font-size-2xl);
    color: var(--accent-primary);
}

.skill-category-header h3 {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

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

.skill-tag {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: all 0.2s ease;
    cursor: default;
}

.skill-tag:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

/* ============================================
   ACADEMICS SECTION
   ============================================ */
.academics {
    background-color: var(--bg-primary);
}

.academics-container {
    max-width: 1000px;
    margin: 0 auto;
}

.academics-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.academics-info h3 {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.academics-info p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.academics-gpa {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.gpa-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.gpa-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--accent-primary);
}

/* Subsections within academics */
.academics-section {
    margin-bottom: var(--spacing-2xl);
}

.subsection-title {
    font-size: var(--font-size-xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.subsection-title i {
    color: var(--accent-primary);
}

/* Two-column layout for large screens */
.academics-two-column {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 1024px) {
    .academics-two-column {
        grid-template-columns: 45% 55%;
        gap: var(--spacing-2xl);
    }
    
    .academics-left-column,
    .academics-right-column {
        max-height: 800px;
        overflow-y: auto;
        padding-right: var(--spacing-md);
    }
    
    /* Custom scrollbar styling */
    .academics-left-column::-webkit-scrollbar,
    .academics-right-column::-webkit-scrollbar {
        width: 8px;
    }
    
    .academics-left-column::-webkit-scrollbar-track,
    .academics-right-column::-webkit-scrollbar-track {
        background: var(--bg-secondary);
        border-radius: var(--radius-sm);
    }
    
    .academics-left-column::-webkit-scrollbar-thumb,
    .academics-right-column::-webkit-scrollbar-thumb {
        background: var(--accent-primary);
        border-radius: var(--radius-sm);
    }
    
    .academics-left-column::-webkit-scrollbar-thumb:hover,
    .academics-right-column::-webkit-scrollbar-thumb:hover {
        background: var(--accent-hover);
    }
}

/* Communities section */
.communities-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.community-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.community-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-primary);
}

.community-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.community-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    object-fit: contain;
    background: white;
    padding: 0.4rem;
}

.course-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    object-fit: contain;
    background: white;
    padding: 0.4rem;
}

.community-header i {
    font-size: var(--font-size-2xl);
    color: var(--accent-primary);
}

.external-course-header i {
    font-size: var(--font-size-2xl);
    color: var(--accent-primary);
}

.external-course-header i {
    font-size: var(--font-size-2xl);
    color: var(--accent-primary);
}

.community-info h4 {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.community-role {
    font-size: var(--font-size-sm);
    color: var(--accent-secondary);
    font-weight: 600;
}

.community-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.6;
    flex-grow: 1;
}

.community-period {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.community-period i {
    color: var(--accent-primary);
}

/* External courses section */
.external-courses-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.external-course-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.external-course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-secondary);
}

.external-course-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.external-course-header i {
    font-size: var(--font-size-2xl);
    color: var(--accent-secondary);
    margin-top: 0.2rem;
}

.external-course-header h4 {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.course-org {
    font-size: var(--font-size-sm);
    color: var(--accent-primary);
    font-weight: 600;
}

.course-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.6;
    flex-grow: 1;
}

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

.course-period {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 600;
}

.certificate-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--accent-primary);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.certificate-link:hover {
    color: var(--accent-hover);
    transform: translateX(3px);
}

.certificate-pending {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.certificate-pending i {
    color: #f59e0b;
}

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

.semester-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.semester-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.semester-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.semester-header h4 {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

.semester-status {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
}

.semester-status-current {
    color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid var(--accent-primary);
}

.semester-status-current i {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.courses-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.course-item {
    display: grid;
    grid-template-columns: 100px 1fr 60px;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.course-item:hover {
    background: var(--bg-primary);
    transform: translateX(5px);
}

.course-code {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--accent-primary);
}

.course-name {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.course-credits {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    text-align: right;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    background-color: var(--bg-secondary);
}

.contact-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.contact-intro {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
}

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

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

.contact-card i {
    font-size: var(--font-size-3xl);
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.contact-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.contact-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer p {
    color: var(--text-muted);
    margin: 0;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--text-muted);
    font-size: var(--font-size-xl);
    transition: all 0.2s ease;
}

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

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Tablet Screens */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-image {
        order: -1;
        display: flex;
        justify-content: center;
    }
    
    .hero-links {
        justify-content: center;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        padding-left: var(--spacing-2xl);
    }
    
    .timeline-dot {
        left: 12px;
    }
}

/* Mobile Screens */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background: var(--bg-card);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--spacing-xl);
        transition: left 0.3s ease;
        border-top: 1px solid var(--border-color);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        min-height: auto;
        padding-top: 100px;
        padding-bottom: var(--spacing-xl);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .profile-photo {
        max-width: 280px;
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .projects-grid,
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .communities-grid,
    .external-courses-grid,
    .semesters-grid {
        grid-template-columns: 1fr;
    }
    
    .course-item {
        grid-template-columns: 80px 1fr 50px;
        gap: var(--spacing-xs);
    }
    
    .academics-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .academics-gpa {
        align-items: flex-start;
    }
    
    .course-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .timeline-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .contact-methods {
        grid-template-columns: 1fr;
    }
    
    .footer .container {
        flex-direction: column;
        text-align: center;
    }
}

/* Small Mobile Screens */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-links {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .profile-photo {
        max-width: 220px;
    }
}

/* ============================================
   ACCESSIBILITY & UTILITIES
   ============================================ */

/* Focus visible styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Enhanced Print Styles */
@media print {
    .navbar,
    .theme-toggle,
    .mobile-menu-toggle,
    .footer,
    .scroll-to-top,
    .project-links,
    .hero-links,
    .contact-methods,
    .project-filters {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem 0;
        page-break-after: always;
    }
    
    .section-title {
        color: black;
        page-break-after: avoid;
    }
    
    .project-card,
    .timeline-item,
    .skill-category {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .project-screenshot {
        max-height: 200px;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    a[href^="http"]:after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
    
    @page {
        margin: 2cm;
        size: A4;
    }
}