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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
    opacity: 0;
    transition: opacity 0.3s ease;
}

body.loaded {
    opacity: 1;
}

/* Optimize font loading */
@font-face {
    font-family: 'Inter';
    font-display: swap;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header and Navigation */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand h2 {
    color: #4f46e5;
    font-weight: 600;
    font-size: 1.5rem;
}

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

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #4f46e5;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #4f46e5;
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, #ffffff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: #e0e7ff;
    font-weight: 500;
}

.hero-description p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: #f1f5f9;
    line-height: 1.7;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    text-decoration: none;
    border-radius: 50%;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.social-link i {
    font-size: 1.2rem;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-image {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

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

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 3rem;
    color: #1f2937;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 4px;
    background: linear-gradient(45deg, #4f46e5, #7c3aed);
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

/* About Section */
.about {
    padding: 80px 0;
    background: #f8fafc;
}

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

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #64748b;
    line-height: 1.7;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.stat {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.stat:hover {
    transform: translateY(-5px);
}

.stat h3 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #4f46e5;
    margin-bottom: 0.5rem;
}

.stat p {
    color: #64748b;
    font-weight: 500;
}

/* Skills Section */
.skills {
    padding: 80px 0;
}

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

.skill-category {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.skill-category h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1.5rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-tag {
    background: linear-gradient(45deg, #4f46e5, #7c3aed);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: transform 0.3s ease;
}

.skill-tag:hover {
    transform: scale(1.05);
}

/* Projects Section */
.projects {
    padding: 80px 0;
    background: #f8fafc;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

.project-image {
    height: 200px;
    overflow: hidden;
}

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

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
}

.project-content p {
    color: #64748b;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.project-tag {
    background: #e0e7ff;
    color: #4f46e5;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: #4f46e5;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.project-link:hover {
    color: #3730a3;
}

.project-link i {
    font-size: 0.9rem;
}

/* Contact Section */
.contact {
    padding: 80px 0;
}

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

.contact-text p {
    font-size: 1.1rem;
    color: #64748b;
    margin-bottom: 3rem;
    line-height: 1.7;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: white;
    color: #4f46e5;
    text-decoration: none;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 2px solid #e0e7ff;
    transition: all 0.3s ease;
    font-weight: 500;
    min-width: 250px;
    justify-content: center;
}

.contact-link:hover {
    background: #4f46e5;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(79, 70, 229, 0.3);
}

.contact-link i {
    font-size: 1.2rem;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 2rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-link {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .profile-image {
        width: 320px;
        height: 320px;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-links {
        width: 100%;
    }
    
    .contact-link {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .profile-image {
        width: 280px;
        height: 280px;
    }
    
    .project-content {
        padding: 1.5rem;
    }
    
    .skill-category {
        padding: 1.5rem;
    }
    
    .stat {
        padding: 1.5rem;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Career Timeline Styles */
.career {
    padding: 80px 0;
    background: #f8fafc;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background: linear-gradient(45deg, #4f46e5, #7c3aed);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
    border-radius: 2px;
}

.timeline-item {
    padding: 20px 40px;
    position: relative;
    background: inherit;
    width: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background: white;
    border: 4px solid #4f46e5;
    top: 30px;
    border-radius: 50%;
    z-index: 1;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item:nth-child(even)::after {
    left: -10px;
}

.timeline-dot {
    display: none;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    top: 30px;
    border: 10px solid transparent;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -20px;
    border-left-color: white;
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -20px;
    border-right-color: white;
}

.timeline-date {
    color: #4f46e5;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    color: #1f2937;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    color: #6b7280;
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.timeline-content p {
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.timeline-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.timeline-skill {
    background: #e0e7ff;
    color: #4f46e5;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Certifications Styles */
.certifications {
    padding: 80px 0;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.certification-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.certification-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

.cert-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, #4f46e5, #7c3aed);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.cert-content h3 {
    color: #1f2937;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.cert-issuer {
    color: #4f46e5;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.cert-date, .cert-id {
    color: #64748b;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.cert-verify {
    color: #4f46e5;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.cert-verify:hover {
    color: #3730a3;
}

/* Achievements Styles */
.achievements {
    padding: 80px 0;
    background: #f8fafc;
}

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

.achievement-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.achievement-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

.achievement-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(45deg, #4f46e5, #7c3aed);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.achievement-content h3 {
    color: #1f2937;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.achievement-org {
    color: #4f46e5;
    font-weight: 500;
    margin-bottom: 1rem;
}

.achievement-desc {
    color: #64748b;
    line-height: 1.6;
}

/* Enhanced Project Styles */
.project-stats {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.project-stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #64748b;
    font-size: 0.85rem;
    font-weight: 500;
}

.project-stat i {
    color: #4f46e5;
}

/* Mobile Responsiveness for Timeline */
@media (max-width: 768px) {
    .timeline::after {
        left: 20px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 50px;
        padding-right: 20px;
    }
    
    .timeline-item::after {
        left: 10px;
    }
    
    .timeline-item:nth-child(even) {
        left: 0%;
    }
    
    .timeline-item:nth-child(even)::after {
        left: 10px;
    }
    
    .timeline-content::before {
        left: -20px;
        border-right-color: white;
        border-left-color: transparent;
    }
    
    .certifications-grid {
        grid-template-columns: 1fr;
    }
    
    .certification-card {
        flex-direction: column;
        text-align: center;
    }
    
    .achievements-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .timeline-content {
        padding: 1.5rem;
    }
    
    .certification-card {
        padding: 1.5rem;
    }
    
    .achievement-card {
        padding: 1.5rem;
    }
    
    .achievement-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .cert-icon {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
}

/* Smooth scrolling offset for fixed header */
section {
    scroll-margin-top: 80px;
}

/* Timeline Descriptions */
.timeline-description {
    margin-bottom: 1rem;
}

.timeline-description p {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.timeline-description strong {
    color: #4f46e5;
    font-weight: 600;
}

/* Project Categories */
.project-category {
    margin-bottom: 4rem;
}

.category-title {
    font-size: 1.8rem;
    color: #333;
    margin-bottom: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e5e7eb;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.category-title i {
    color: #6366f1;
}

/* Project Badges */
.project-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    background: #3b82f6;
    color: white;
    z-index: 10;
}

.project-badge.personal {
    background: #8b5cf6;
    color: white;
}

.project-badge.ai {
    background: #f59e0b;
    color: white;
}

.project-card {
    position: relative;
}

/* Category-specific styling */
.project-card.professional {
    border-left: 4px solid #3b82f6;
}

.project-card.personal {
    border-left: 4px solid #8b5cf6;
}

.project-card.ai-experiment {
    border-left: 4px solid #f59e0b;
}

/* Company Awards Styling */
.company-award {
    border-left: 4px solid #6366f1;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

.company-award .achievement-icon {
    background: #6366f1;
    color: white;
    border-radius: 50%;
    padding: 1rem;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.achievement-org {
    font-weight: 600;
    color: #6366f1;
    margin-bottom: 0.5rem;
}

.achievement-desc {
    color: #64748b;
    line-height: 1.6;
}

/* Certifications More Section */
.certifications-more {
    margin-top: 3rem;
    text-align: center;
}

.more-certs-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    padding: 2rem;
    color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.more-certs-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: white;
}

.more-certs-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.view-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.view-more-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.view-more-btn i {
    font-size: 1.2rem;
}