/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-accent: #f3f4f6;
    --border-color: #e5e7eb;
    --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);
    --radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
}

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

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}



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

.nav-menu a.active::after {
    width: 100%;
}



/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-accent) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(59, 130, 246, 0.05) 100%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.hero-contact {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.hero-contact p {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.hero-contact i {
    color: var(--primary-color);
    width: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

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

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

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

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

.profile-photo {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    object-fit: cover;
}

.profile-photo:hover {
    transform: scale(1.05);
}

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    text-align: center;
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

/* Why Product Section */
.why-product {
    padding: 80px 0;
    background: var(--bg-primary);
}

/* Experience Section */
.experience {
    padding: 80px 0;
    background: var(--bg-secondary);
    position: relative;
}

.experience.locked {
    position: relative;
}

/* Overlay arrow button for horizontal scroll sections */
.scroll-overlay {
    position: fixed;
    bottom: 40px;
    right: 40px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.scroll-overlay.visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.scroll-overlay-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.scroll-overlay-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 32px rgba(37, 99, 235, 0.5);
}

.scroll-overlay-btn:active {
    transform: translateY(-2px) scale(1.02);
}

.scroll-overlay-btn i {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-8px);
    }
    60% {
        transform: translateY(-4px);
    }
}

/* Left/Right carousel arrows for Experience/Projects */
.carousel-arrows {
    position: fixed;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    padding: 0 18px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.carousel-arrows.visible {
    opacity: 1;
    visibility: visible;
}

.carousel-arrow-btn {
    pointer-events: auto;
    width: 52px;
    height: 52px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(12, 16, 24, 0.55);
    color: var(--text-primary);
    backdrop-filter: blur(12px) saturate(140%);
    -webkit-backdrop-filter: blur(12px) saturate(140%);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
    transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.carousel-arrow-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    background: rgba(12, 16, 24, 0.7);
    box-shadow: 0 14px 34px rgba(0, 0, 0, 0.45);
}

.carousel-arrow-btn:active:not(:disabled) {
    transform: translateY(-1px);
}

.carousel-arrow-btn:disabled {
    opacity: 0.25;
    cursor: not-allowed;
}

.experience-grid {
    display: flex;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    gap: 2rem;
    padding: 2rem;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) transparent;
    -webkit-overflow-scrolling: touch;
    scroll-padding: 2rem;
}

.experience-grid::-webkit-scrollbar {
    height: 8px;
}

.experience-grid::-webkit-scrollbar-track {
    background: transparent;
}

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

.experience-grid.scrolling {
    scroll-snap-type: x mandatory;
}

.experience-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    flex: 0 0 calc(33.333% - 1.33rem);
    max-width: calc(33.333% - 1.33rem);
    scroll-snap-align: start;
    min-width: 0;
    height: 600px;
    max-height: 600px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

@media (max-width: 1200px) {
    .experience-card {
        flex: 0 0 calc(50% - 1rem);
        max-width: calc(50% - 1rem);
    }
}

@media (max-width: 768px) {
    .experience-card {
        flex: 0 0 calc(100% - 2rem);
        max-width: calc(100% - 2rem);
    }
}

.experience-card .experience-header {
    flex-shrink: 0;
}

.experience-card .achievement-list {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 0.5rem;
    margin-right: -0.5rem;
}

.experience-card .achievement-list::-webkit-scrollbar {
    width: 6px;
}

.experience-card .achievement-list::-webkit-scrollbar-track {
    background: transparent;
}

.experience-card .achievement-list::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
    opacity: 0.5;
}

.experience-card .achievement-list::-webkit-scrollbar-thumb:hover {
    opacity: 0.8;
}

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



.experience-header {
    margin-bottom: 1.5rem;
}

.experience-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.company {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-right: 1rem;
}

.duration {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-right: 1rem;
}

.location {
    color: var(--text-light);
    font-size: 0.875rem;
}

.experience-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.achievement-list {
    list-style: none;
}

.achievement-list li {
    background: var(--bg-accent);
    padding: 1rem;
    margin: 0.5rem 0;
    border-left: 4px solid var(--primary-color);
    border-radius: 0 var(--radius) var(--radius) 0;
    color: var(--text-secondary);
}

/* Projects Section */
.projects {
    padding: 80px 0;
    background: var(--bg-primary);
    position: relative;
}

.projects.locked {
    position: relative;
}

.projects-grid {
    display: flex;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    gap: 2rem;
    padding: 2rem;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) transparent;
    -webkit-overflow-scrolling: touch;
    scroll-padding: 2rem;
}

.projects-grid::-webkit-scrollbar {
    height: 8px;
}

.projects-grid::-webkit-scrollbar-track {
    background: transparent;
}

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

.projects-grid.scrolling {
    scroll-snap-type: x mandatory;
}

.project-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    flex: 0 0 calc(33.333% - 1.33rem);
    max-width: calc(33.333% - 1.33rem);
    scroll-snap-align: start;
    min-width: 0;
    height: 600px;
    max-height: 600px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

@media (max-width: 1200px) {
    .project-card {
        flex: 0 0 calc(50% - 1rem);
        max-width: calc(50% - 1rem);
    }
}

@media (max-width: 768px) {
    .project-card {
        flex: 0 0 calc(100% - 2rem);
        max-width: calc(100% - 2rem);
    }
}

.project-card .project-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.project-card .project-content h3 {
    flex-shrink: 0;
}

.project-card .project-achievements {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 0.5rem;
    margin-right: -0.5rem;
}

.project-card .project-achievements::-webkit-scrollbar {
    width: 6px;
}

.project-card .project-achievements::-webkit-scrollbar-track {
    background: transparent;
}

.project-card .project-achievements::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
    opacity: 0.5;
}

.project-card .project-achievements::-webkit-scrollbar-thumb:hover {
    opacity: 0.8;
}

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



.project-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-achievements {
    list-style: none;
    margin-bottom: 1.5rem;
}

.project-achievements li {
    background: var(--bg-accent);
    padding: 0.75rem;
    margin: 0.5rem 0;
    border-left: 3px solid var(--primary-color);
    border-radius: 0 var(--radius) var(--radius) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.project-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.stat {
    text-align: center;
    padding: 1rem;
    background: var(--bg-primary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Skills Section */
.skills {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.skills-grid {
    display: flex;
    overflow-x: visible;
    overflow-y: visible;
    gap: 2rem;
    padding: 2rem 0;
    flex-wrap: wrap;
    justify-content: center;
}

.skills-grid::-webkit-scrollbar {
    height: 8px;
}

.skills-grid::-webkit-scrollbar-track {
    background: transparent;
}

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

.skills-grid.scrolling {
    scroll-snap-type: x mandatory;
}

.skill-category {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    flex: 0 0 calc(33.333% - 1.5rem);
    max-width: calc(33.333% - 1.5rem);
    min-width: 0;
}

.skill-category:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.skill-category h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

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



/* Education Section */
.education {
    padding: 80px 0;
    background: var(--bg-primary);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.education-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.education-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.degree {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.graduation {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Research Section */
.research {
    padding: 5rem 0;
    background-color: var(--bg-secondary);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.research-card {
    background: var(--bg-primary);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

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



.research-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.research-icon i {
    font-size: 1.5rem;
    color: white;
}

.research-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.research-journal {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.research-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.research-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.highlight-tag {
    background: var(--bg-accent);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

/* Certifications Section */
.certifications {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.certification-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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



.certification-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.certification-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.certification-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Community Leadership Section */
.community {
    padding: 80px 0;
    background: var(--bg-primary);
}

.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.community-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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



.community-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.community-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.community-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Interests Section */
.interests {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.interests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.interest-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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



.interest-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.interest-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.interest-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background: var(--bg-primary);
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-method {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.contact-method h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.contact-method h3 i {
    color: var(--primary-color);
}

.contact-method p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.contact-btn {
    width: 100%;
    justify-content: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--bg-secondary);
    color: var(--primary-color);
    border-radius: 50%;
    text-decoration: none;
    font-size: 1.25rem;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .projects-grid,
    .education-grid,
    .community-grid,
    .research-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .interests-grid,
    .certifications-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-methods {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    .experience-card,
    .project-card,
    .education-card,
    .interest-card,
    .certification-card,
    .community-card,
    .research-card {
        padding: 1.5rem;
    }
    
    .hero-contact {
        text-align: center;
    }
}

/* ---- Dark Glassmorphism Theme Overrides ---- */
:root {
    --primary-color: #60a5fa;
    --secondary-color: #3b82f6;
    --accent-color: #22d3ee;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --text-light: #6b7280;
    --bg-primary: #0b0f19;
    --bg-secondary: rgba(255, 255, 255, 0.06);
    --bg-accent: rgba(255, 255, 255, 0.04);
    --border-color: rgba(255, 255, 255, 0.12);
    --hairline: rgba(255, 255, 255, 0.18);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
    --radius: 16px;
    --blur-strength: 20px;
}

body {
    background:
        radial-gradient(1200px 700px at 10% -10%, rgba(59, 130, 246, 0.15), transparent 60%),
        radial-gradient(900px 500px at 90% 10%, rgba(34, 211, 238, 0.12), transparent 60%),
        radial-gradient(1000px 600px at 50% 120%, rgba(99, 102, 241, 0.10), transparent 60%),
        var(--bg-primary);
    color: var(--text-primary);
}

.navbar {
    background: rgba(12, 16, 24, 0.5);
    backdrop-filter: blur(var(--blur-strength)) saturate(150%);
    -webkit-backdrop-filter: blur(var(--blur-strength)) saturate(150%);
    border-bottom: 1px solid var(--hairline);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    overflow: hidden;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(12, 16, 24, 0.8);
    backdrop-filter: blur(calc(var(--blur-strength) + 10px)) saturate(180%);
    -webkit-backdrop-filter: blur(calc(var(--blur-strength) + 10px)) saturate(180%);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.navbar::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(180deg, rgba(255,255,255,0.12), rgba(255,255,255,0.02) 60%, transparent 100%);
    opacity: 0.4;
}

.navbar::after {
    content: '';
    position: absolute;
    inset: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    mix-blend-mode: overlay;
    pointer-events: none;
}

.nav-logo { 
    color: var(--text-primary); 
    position: relative;
    z-index: 1;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateX(-20px);
    pointer-events: none;
}

.nav-logo.visible {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

.nav-logo:hover {
    color: var(--accent-color);
    text-shadow: 0 2px 8px rgba(34, 211, 238, 0.4);
}

.hero { background: linear-gradient(135deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.02) 100%); }
.hero::before {
    background:
        radial-gradient(600px 300px at 20% 20%, rgba(59, 130, 246, 0.20), transparent 60%),
        radial-gradient(500px 280px at 80% 30%, rgba(34, 211, 238, 0.18), transparent 60%);
}
.hero-subtitle { color: var(--accent-color); }

.btn-primary {
    background: linear-gradient(180deg, var(--secondary-color), var(--primary-color));
    color: #0b0f19;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.2);
}
.btn-primary:hover {
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    box-shadow: 0 8px 24px rgba(34, 211, 238, 0.35);
}
.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid var(--hairline);
    backdrop-filter: blur(calc(var(--blur-strength) / 2));
    -webkit-backdrop-filter: blur(calc(var(--blur-strength) / 2));
}
.btn-secondary:hover { background: rgba(255, 255, 255, 0.1); }

.profile-photo { border: 1px solid var(--hairline); background: rgba(255, 255, 255, 0.04); }

.experience, .projects, .skills, .education, .research, .certifications, .community, .interests, .contact {
    background: transparent;
}

.experience-card, .project-card, .skill-category, .education-card, .research-card, .certification-card, .community-card, .interest-card, .contact-method, .social-link {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--hairline);
    backdrop-filter: blur(var(--blur-strength)) saturate(140%);
    -webkit-backdrop-filter: blur(var(--blur-strength)) saturate(140%);
    position: relative;
    overflow: hidden;
}

.company {
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.25), rgba(59, 130, 246, 0.15));
    color: var(--text-primary);
    border: 1px solid var(--hairline);
}

.achievement-list li, .project-achievements li, .highlight-tag, .stat { background: rgba(255, 255, 255, 0.05); border-color: var(--hairline); }
.achievement-list li { border-left-color: var(--secondary-color); }
.project-achievements li { border-left-color: var(--secondary-color); }
.research-journal { color: var(--accent-color); }
.certification-icon, .community-icon, .interest-icon { color: var(--accent-color); }

.social-links { border-top: 1px solid var(--hairline); }
.social-link { color: var(--text-primary); }
.social-link:hover {
    background: linear-gradient(180deg, var(--secondary-color), var(--accent-color));
    color: #0b0f19;
    box-shadow: 0 12px 30px rgba(34, 211, 238, 0.35);
}

/* Subtle glass highlight sheen on cards */
.experience-card::before, .project-card::before, .skill-category::before, .education-card::before, .research-card::before, .certification-card::before, .community-card::before, .interest-card::before, .contact-method::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(180deg, rgba(255,255,255,0.18), rgba(255,255,255,0.04) 40%, rgba(255,255,255,0.02) 100%);
    opacity: 0.35;
}

/* Light inner stroke for depth */
.experience-card::after, .project-card::after, .skill-category::after, .education-card::after, .research-card::after, .certification-card::after, .community-card::after, .interest-card::after, .contact-method::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border: 1px solid rgba(255, 255, 255, 0.06);
    mix-blend-mode: overlay;
    pointer-events: none;
}

/* Elevated, smooth hover with micro parallax */
.experience-card:hover, .project-card:hover, .skill-category:hover, .education-card:hover, .research-card:hover, .certification-card:hover, .community-card:hover, .interest-card:hover, .contact-method:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
}

/* Sheen sweep on hover */
.experience-card:hover::before, .project-card:hover::before, .skill-category:hover::before, .education-card:hover::before, .research-card:hover::before, .certification-card:hover::before, .community-card:hover::before, .interest-card:hover::before, .contact-method:hover::before {
    opacity: 0.45;
}

/* Button hover polish */
.btn { transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease; }
.btn:active { transform: translateY(0); filter: brightness(0.98); }

/* Nav menu items with glass effect */
.nav-menu {
    position: relative;
    z-index: 1;
}

.nav-menu a {
    position: relative;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.nav-menu a:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(34, 211, 238, 0.2);
}

.nav-menu a.active {
    background: rgba(34, 211, 238, 0.15);
    color: var(--accent-color);
    box-shadow: 0 2px 8px rgba(34, 211, 238, 0.3);
}

/* Link underline animation refinement */
.nav-menu a::after { 
    height: 2px; 
    border-radius: 2px; 
    box-shadow: 0 0 8px rgba(96,165,250,0.6);
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
}

/* Icon chips hover */
.skill-tag { box-shadow: inset 0 1px 0 rgba(255,255,255,0.12); }
.skill-tag:hover { box-shadow: 0 8px 20px rgba(59,130,246,0.25); }

/* Stats subtle glow */
.stat-number { text-shadow: 0 2px 12px rgba(96,165,250,0.25); }

.footer {
    background: rgba(12, 16, 24, 0.6);
    backdrop-filter: blur(var(--blur-strength));
    -webkit-backdrop-filter: blur(var(--blur-strength));
    color: var(--text-secondary);
    border-top: 1px solid var(--hairline);
}

/* Mobile nav toggle styles */
.nav-toggle { 
    display: none; 
    width: 44px; 
    height: 44px; 
    border-radius: 12px; 
    border: 1px solid var(--hairline); 
    background: rgba(255,255,255,0.06); 
    color: var(--text-primary); 
    align-items: center; 
    justify-content: center; 
    cursor: pointer; 
    position: relative;
    z-index: 1;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: var(--transition);
}

.nav-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(34, 211, 238, 0.2);
}
.nav-toggle .bar { width: 20px; height: 2px; background: var(--text-primary); border-radius: 2px; position: relative; }
.nav-toggle .bar::before, .nav-toggle .bar::after { content: ''; position: absolute; left: 0; width: 20px; height: 2px; background: var(--text-primary); border-radius: 2px; }
.nav-toggle .bar::before { top: -6px; }
.nav-toggle .bar::after { top: 6px; }

@media (max-width: 768px) {
    .nav-toggle { display: inline-flex; }
    .nav-menu {
        position: absolute;
        top: 70px;
        right: 1rem;
        left: 1rem;
        display: none;
        flex-direction: column;
        gap: 0.75rem;
        padding: 0.75rem;
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid var(--hairline);
        border-radius: 12px;
        backdrop-filter: blur(var(--blur-strength));
        -webkit-backdrop-filter: blur(var(--blur-strength));
    }
    .nav-menu.active { display: flex; }
}