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

:root {
    /* Light mode colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #2c3e50;
    --text-secondary: #666;
    --text-muted: rgba(0, 0, 0, 0.6);
    --accent-primary: #3498db;
    --accent-secondary: #9b59b6;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --border-color: #e1e8ed;
    --navbar-bg: 255, 255, 255;
}

[data-theme="dark"] {
    /* Dark mode colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #404040;
    --text-primary: #ffffff;
    --text-secondary: #b8b8b8;
    --text-muted: rgba(255, 255, 255, 0.6);
    --accent-primary: #64b5f6;
    --accent-secondary: #ba68c8;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    --border-color: #404040;
    --navbar-bg: 26, 26, 26;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    transition: all 0.3s ease;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    opacity: 1;
    visibility: visible;
    transition: all 0.5s ease;
}

.loading-screen.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loader {
    text-align: center;
    color: white;
}

.loader-circle {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

.loader-text {
    font-size: 1.2rem;
    font-weight: 500;
    letter-spacing: 1px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Scroll Progress Bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: linear-gradient(90deg, #3498db, #9b59b6);
    z-index: 1001;
    transition: width 0.2s ease;
}

/* Dark Mode Toggle */
.theme-switch-wrapper {
    position: fixed;
    top: 100px;
    right: 20px;
    z-index: 1000;
}

.theme-switch {
    display: inline-block;
    height: 50px;
    position: relative;
    width: 90px;
}

.theme-switch input {
    display: none;
}

.slider {
    background-color: #ccc;
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: .4s;
    border-radius: 25px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.slider:before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: 42px;
    left: 4px;
    position: absolute;
    transition: .4s;
    width: 42px;
    border-radius: 50%;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

input:checked + .slider {
    background-color: #2196F3;
}

input:checked + .slider:before {
    transform: translateX(40px);
}

.slider i {
    color: #ffd700;
    z-index: 1;
    transition: all 0.3s ease;
}

.fa-moon {
    color: #fff;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--accent-secondary);
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(var(--navbar-bg), 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

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

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

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

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

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

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background: var(--accent-primary);
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="%23ffffff08" points="0,0 1000,300 1000,1000 0,700"/></svg>');
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.highlight {
    background: linear-gradient(45deg, #ffd700, #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
    line-height: 1.7;
}

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(45deg, #ff6b6b, #ffd700);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(255, 107, 107, 0.3);
}

.btn-outline {
    border: 2px solid #fff;
    color: #fff;
    background: transparent;
}

.btn-outline:hover {
    background: #fff;
    color: #333;
    transform: translateY(-3px);
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    text-decoration: none;
    border-radius: 50%;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.social-link:hover {
    background: #fff;
    color: #333;
    transform: translateY(-3px);
}

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

.image-container {
    position: relative;
    width: 350px;
    height: 350px;
    border-radius: 50%;
    overflow: hidden;
    border: 8px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 25%; /* Shows upper 25% - better for portraits */
    transition: transform 0.3s ease;
    /* Alternative options - uncomment to try different approaches */
    /* object-fit: contain; */ /* Shows full image without cropping */
    /* width: 110%; height: 110%; margin: -5%; */ /* Zoom out slightly to show more */
    /* object-position: center top; */ /* Shows from the very top */
    /* object-position: center center; */ /* Centers the image */
}

.image-container:hover .profile-image {
    transform: scale(1.1);
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 1rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(45deg, #3498db, #9b59b6);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about {
    background: #f8f9fa;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text h3 {
    font-size: 1.8rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: #666;
    line-height: 1.7;
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
}

.stat h4 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #3498db;
    margin-bottom: 0.5rem;
}

.stat p {
    color: #666;
    font-weight: 500;
}

.info-card {
    background: #fff;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.info-card h4 {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.education-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #eee;
}

.education-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.education-item h5 {
    color: #2c3e50;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.education-item p {
    color: #666;
    margin-bottom: 0.5rem;
}

.education-item span {
    color: #3498db;
    font-weight: 500;
    font-size: 0.9rem;
}

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

.skill-category {
    background: #fff;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.skill-category h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: #f8f9fa;
    padding: 0.8rem 1.2rem;
    border-radius: 25px;
    font-weight: 500;
    color: #333;
    transition: all 0.3s ease;
}

.skill-item:hover {
    background: #3498db;
    color: #fff;
    transform: translateY(-2px);
}

.certification-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.certification-item {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid #3498db;
}

.certification-item h4 {
    color: #2c3e50;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.certification-item p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.certification-item span {
    color: #3498db;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Projects Section */
.projects {
    background: #f8f9fa;
}

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

.project-card {
    background: #fff;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.project-card:hover {
    transform: translateY(-10px);
}

.project-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px 15px 0 0;
    position: relative;
    overflow: hidden;
}

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

.project-card:hover .project-img {
    transform: scale(1.05);
}
.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project-card:hover .project-overlay {
    opacity: 1;
}

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

.project-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: #fff;
    color: #333;
    border-radius: 50%;
    text-decoration: none;
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.project-link:hover {
    transform: scale(1.1);
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    color: #2c3e50;
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.project-content p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tech-tag {
    background: #e3f2fd;
    color: #1976d2;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-date {
    color: #3498db;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: #3498db;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1.2rem;
}

.contact-details h4 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.contact-details a,
.contact-details p {
    color: #666;
    text-decoration: none;
}

.contact-details a:hover {
    color: #3498db;
}

.contact-form {
    background: #fff;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e1e8ed;
    border-radius: 10px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: #2c3e50;
    color: #fff;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-info h3 {
    margin-bottom: 0.5rem;
}

.footer-info p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1rem;
}

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

.footer-social .social-link {
    background: rgba(255, 255, 255, 0.1);
}

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

.footer-section h4 {
    margin-bottom: 1rem;
    color: #3498db;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: #fff;
        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;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-stats {
        justify-content: center;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }

    .image-container {
        width: 280px;
        height: 280px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .section-title {
        font-size: 2rem;
    }

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

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

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading Animation */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Enhanced Skills Section */
.skill-items-enhanced {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skill-item-enhanced {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.skill-item-enhanced:hover {
    transform: translateY(-3px);
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.skill-header i {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-right: 0.5rem;
}

.skill-header span:first-of-type {
    font-weight: 600;
    color: var(--text-primary);
}

.skill-percentage {
    font-weight: 700;
    color: var(--accent-primary);
    font-size: 0.9rem;
}

.skill-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 10px;
    width: 0%;
    transition: width 2s ease-in-out;
    position: relative;
    overflow: hidden;
}

.skill-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

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

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

.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    width: 50%;
    padding: 0 2rem;
}

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

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

.timeline-dot {
    position: absolute;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--accent-primary);
    border: 4px solid var(--bg-primary);
    border-radius: 50%;
    z-index: 2;
    box-shadow: var(--shadow);
}

.timeline-item:nth-child(odd) .timeline-dot {
    right: -40px;
}

.timeline-item:nth-child(even) .timeline-dot {
    left: -40px;
}

.timeline-content {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    position: relative;
    transition: transform 0.3s ease;
}

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

.timeline-content::before {
    content: '';
    position: absolute;
    top: 20px;
    width: 0;
    height: 0;
    border: 15px solid transparent;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -30px;
    border-left-color: var(--bg-primary);
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -30px;
    border-right-color: var(--bg-primary);
}

.timeline-date {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    color: var(--accent-secondary);
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.timeline-content p br {
    line-height: 1.2;
}

.timeline-badge {
    display: inline-block;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Project Filters */
.project-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.filter-btn {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    font-family: inherit;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* Enhanced Project Cards */
.project-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 3;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
}

.project-status {
    background: #27ae60;
    color: white;
    padding: 0.2rem 0.8rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

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

.project-card.show {
    display: block;
    animation: fadeInUp 0.6s ease forwards;
}

/* Testimonials Section */
.testimonials {
    background: var(--bg-secondary);
}

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

.testimonial-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.testimonial-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

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

.testimonial-content {
    margin-bottom: 2rem;
    position: relative;
}

.quote-icon {
    font-size: 2rem;
    color: var(--accent-primary);
    margin-bottom: 1rem;
    opacity: 0.7;
}

.testimonial-content p {
    color: var(--text-secondary);
    font-style: italic;
    line-height: 1.7;
    position: relative;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.author-info h4 {
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: 0.2rem;
}

.author-info span {
    color: var(--accent-primary);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Enhanced Responsive Design */
@media (max-width: 768px) {
    .theme-switch-wrapper {
        top: 80px;
        right: 10px;
    }
    
    .timeline-container::before {
        left: 20px;
    }
    
    .timeline-item {
        width: 100%;
        left: 0 !important;
        text-align: left !important;
        padding-left: 3rem;
    }
    
    .timeline-dot {
        left: 10px !important;
        right: auto !important;
    }
    
    .timeline-content::before {
        left: -30px !important;
        border-right-color: var(--bg-primary) !important;
        border-left-color: transparent !important;
    }
    
    .project-filters {
        flex-direction: column;
        align-items: center;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .skill-items-enhanced {
        gap: 1rem;
    }
}

/* Enhanced Certifications Section */
.certifications-section {
    grid-column: 1 / -1; /* Full width */
    margin-top: 2rem;
}

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

.certification-card {
    background: var(--bg-primary);
    border-radius: 15px;
    padding: 0;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.certification-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.certification-card.featured {
    border: 2px solid var(--accent-primary);
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.05), rgba(155, 89, 182, 0.05));
}

.cert-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 1.5rem 0;
    position: relative;
}

.cert-icon {
    width: 60px;
    height: 60px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    box-shadow: 0 8px 20px rgba(52, 152, 219, 0.3);
}

.cert-icon.mongodb {
    background: linear-gradient(45deg, #47A248, #4DB33D);
    box-shadow: 0 8px 20px rgba(71, 162, 72, 0.3);
}

.cert-icon.tata {
    background: linear-gradient(45deg, #1B365C, #FF6B35);
    box-shadow: 0 8px 20px rgba(27, 54, 92, 0.3);
}

.cert-badge {
    background: linear-gradient(45deg, #ff6b6b, #ffd700);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cert-badge.latest {
    background: linear-gradient(45deg, #27ae60, #2ecc71);
}

.cert-content {
    padding: 1.5rem;
}

.cert-content h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.cert-provider {
    color: var(--accent-primary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.cert-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.cert-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.skill-chip {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.skill-chip:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.cert-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.cert-date {
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.cert-btn {
    background: transparent;
    border: 2px solid var(--accent-primary);
    color: var(--accent-primary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.cert-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-primary);
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.summary-item {
    text-align: center;
}

.summary-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
    display: block;
}

.summary-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Certification Card Animations */
@keyframes certSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.certification-card {
    animation: certSlideIn 0.6s ease forwards;
}

.certification-card:nth-child(2) {
    animation-delay: 0.2s;
}

.certification-card:nth-child(3) {
    animation-delay: 0.4s;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .certifications-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .cert-summary {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        text-align: center;
    }
    
    .cert-skills {
        justify-content: center;
    }
    
    .cert-footer {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* Enhanced Skills Section */
.skills-content-enhanced {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.skill-category-enhanced {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.skill-category-enhanced:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.category-header {
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1.5rem;
}

.category-icon {
    width: 70px;
    height: 70px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    box-shadow: 0 10px 25px rgba(52, 152, 219, 0.3);
}

.category-info h3 {
    color: var(--text-primary);
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.category-info p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.5;
}

.skill-items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--bg-secondary);
    border-radius: 15px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
    cursor: pointer;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.skill-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    border-color: var(--accent-primary);
}

.skill-card.advanced {
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.05), rgba(39, 174, 96, 0.05));
}

.skill-card.intermediate {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.05), rgba(155, 89, 182, 0.05));
}

.skill-card.beginner {
    background: linear-gradient(135deg, rgba(241, 196, 15, 0.05), rgba(230, 126, 34, 0.05));
}

.skill-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
    transition: transform 0.3s ease;
}

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

/* Specific skill icon colors */
.skill-icon.python { background: linear-gradient(45deg, #3776ab, #ffd343); }
.skill-icon.java { background: linear-gradient(45deg, #ed8b00, #5382a1); }
.skill-icon.javascript { background: linear-gradient(45deg, #f7df1e, #323330); }
.skill-icon.sql { background: linear-gradient(45deg, #336791, #00758f); }
.skill-icon.pandas { background: linear-gradient(45deg, #150458, #e70488); }
.skill-icon.numpy { background: linear-gradient(45deg, #013243, #4dabcf); }
.skill-icon.plotly { background: linear-gradient(45deg, #3f4f75, #636efa); }
.skill-icon.seaborn { background: linear-gradient(45deg, #4c72b0, #55a868); }
.skill-icon.html { background: linear-gradient(45deg, #e34f26, #f16529); }
.skill-icon.css { background: linear-gradient(45deg, #1572b6, #33a9dc); }
.skill-icon.azure { background: linear-gradient(45deg, #0078d4, #00bcf2); }
.skill-icon.git { background: linear-gradient(45deg, #f1502f, #de4c36); }

.skill-info {
    text-align: center;
    flex-grow: 1;
}

.skill-info h4 {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.skill-level {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
}

.skill-card.advanced .skill-level {
    background: linear-gradient(45deg, #27ae60, #2ecc71);
    color: white;
}

.skill-card.intermediate .skill-level {
    background: linear-gradient(45deg, #3498db, #9b59b6);
    color: white;
}

.skill-card.beginner .skill-level {
    background: linear-gradient(45deg, #f39c12, #e67e22);
    color: white;
}

.skill-progress-circle {
    position: relative;
    width: 60px;
    height: 60px;
    margin: 1rem auto;
}

.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring__circle {
    stroke-dasharray: 164;
    stroke-dashoffset: 164;
    transition: stroke-dashoffset 2s ease-in-out;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
}

.skill-experience {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    text-align: center;
    margin-top: 1rem;
}

.skills-summary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 20px;
    padding: 3rem 2rem;
    margin-top: 3rem;
    text-align: center;
    color: white;
}

.summary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: block;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.stat-label {
    font-size: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.9;
}

/* Skill Animation on Scroll */
.skill-card {
    opacity: 0;
    transform: translateY(30px);
    animation: skillSlideIn 0.6s ease forwards;
}

@keyframes skillSlideIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.skill-card:nth-child(1) { animation-delay: 0.1s; }
.skill-card:nth-child(2) { animation-delay: 0.2s; }
.skill-card:nth-child(3) { animation-delay: 0.3s; }
.skill-card:nth-child(4) { animation-delay: 0.4s; }
.skill-card:nth-child(5) { animation-delay: 0.5s; }
.skill-card:nth-child(6) { animation-delay: 0.6s; }

/* Skill Search & Filter Section */
.skill-search-container {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.search-header {
    text-align: center;
    margin-bottom: 2rem;
}

.search-header h3 {
    color: var(--text-primary);
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.search-header h3 i {
    color: var(--accent-primary);
    margin-right: 0.5rem;
}

.search-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.search-controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.search-input-wrapper {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

.search-input-wrapper i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.skill-search-input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-family: inherit;
    font-size: 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.skill-search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.skill-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-filter-btn {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    font-family: inherit;
    font-size: 0.9rem;
}

.skill-filter-btn:hover,
.skill-filter-btn.active {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

/* Skill Insights Section */
.skill-insights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.insight-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}

.insight-item:hover {
    transform: translateY(-3px);
}

.insight-item i {
    font-size: 1.8rem;
    color: white;
    opacity: 0.9;
}

.insight-content h4 {
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.insight-content p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin: 0;
}

/* Skill Comparison Chart Section */
.skill-comparison-section {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 2.5rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    text-align: center;
}

.skill-comparison-section h3 {
    color: var(--text-primary);
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.skill-comparison-section h3 i {
    color: var(--accent-primary);
    margin-right: 0.5rem;
}

.skill-comparison-section p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 2rem;
}

.comparison-chart {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.chart-container {
    width: 100%;
    max-width: 800px;
    height: 400px;
    background: var(--bg-secondary);
    border-radius: 15px;
    padding: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.chart-legend {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 4px;
}

.legend-item span {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Skill Card Filtering Animation */
.skill-card.filtered-out {
    opacity: 0.3;
    transform: scale(0.95);
    pointer-events: none;
}

.skill-card.filtered-in {
    opacity: 1;
    transform: scale(1);
}


/* Mobile Responsive for Enhanced Skills */
@media (max-width: 768px) {
    .skill-items-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .category-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .category-info h3 {
        font-size: 1.5rem;
    }
    
    .summary-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .stat-number {
        font-size: 2.2rem;
    }
    
    .skill-category-enhanced {
        padding: 2rem 1.5rem;
    }
    
    .search-controls {
        gap: 1rem;
    }
    
    .skill-filters {
        flex-direction: column;
        align-items: center;
    }
    
    .skill-insights {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .chart-container {
        height: 300px;
        padding: 1rem;
    }
    
    .chart-legend {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .summary-stats {
        grid-template-columns: 1fr;
    }
    
    .skill-items-grid {
        grid-template-columns: 1fr;
    }
    
    .skill-search-container,
    .skill-comparison-section {
        padding: 1.5rem;
    }
    
    .chart-container {
        height: 250px;
        padding: 0.5rem;
    }
}