/* --- Root Variables & Base Styles --- */
:root {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --text-primary: #f9fafb;
    --text-secondary: #e5e7eb;
    --accent-primary: #14b8a6;
    --accent-secondary: #f97316;
    --accent-tertiary: #00d9ff;
    --card-bg: #27303d;
    --border-color: #4b5563;
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    font-family: var(--font-family);
    line-height: 1.6;
}



/* Ensure main content is above the particle background */
#tsparticles {
    z-index: -1;
}

/* --- Utility Classes --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--accent-primary);
    border-radius: 2px;
}

.highlight {
    color: var(--accent-primary);
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: transparent;
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

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

.btn-secondary:hover {
    background-color: var(--accent-secondary);
    color: var(--bg-primary);
}

/* --- Navbar --- */
.navbar {
    position: sticky;
    top: 0;
    width: 100%;
    background-color: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin-left: 1rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease, transform 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

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

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 1rem;
    position: relative;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 3rem;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 3rem;
    text-align: left;
}

.hero-text {
    flex: 1 1 500px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    animation: fadeIn 1s ease-in-out;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--accent-secondary);
    margin-bottom: 1.5rem;
    animation: fadeIn 1.5s ease-in-out;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    animation: fadeIn 2s ease-in-out;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    animation: slideInFromLeft 1s ease-in-out;
}

.hero-social {
    display: flex;
    gap: 1rem;
    animation: slideInFromLeft 1.5s ease-in-out;
}

.social-link {
    font-size: 1.5rem;
    color: var(--text-secondary);
    transition: color 0.3s ease, transform 0.3s ease;
}

.social-link:hover {
    color: var(--accent-primary);
    transform: translateY(-5px);
}

.hero-image {
    flex: 1 1 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-container {
    border-radius: 50%;
    overflow: hidden;
    width: 300px;
    height: 300px;
    border: 5px solid var(--accent-primary);
    box-shadow: 0 0 20px rgba(20, 184, 166, 0.5);
    animation: glowing-border 2s infinite alternate, fadeIn 2s ease-in-out;
}

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

/* --- About Section --- */

.about-content {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.about-text {
    flex: 2 1 600px;
}

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

.about-text p {
    font-size: 1rem;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 2rem;
    justify-content: space-between;
}

.stat-item {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    flex: 1 1 150px;
    min-width: 150px;
    border-left: 3px solid var(--accent-primary);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.stat-item h4 {
    font-size: 2rem;
    color: var(--accent-secondary);
}

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

.about-info {
    flex: 1 1 300px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.info-item {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-left: 3px solid var(--accent-primary);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.info-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.info-item i {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.info-item h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
}

.info-item p {
    font-size: 0.9rem;
}

/* --- Education Section --- */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    width: 2px;
    height: 100%;
    background-color: var(--border-color);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    margin-bottom: 2rem;
    padding: 20px;
    background-color: var(--card-bg);
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-item:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.timeline-item:nth-child(odd) {
    left: 0;
    border-left: 3px solid var(--accent-primary);
}

.timeline-item:nth-child(even) {
    left: 50%;
    border-right: 3px solid var(--accent-secondary);
}

.timeline-icon {
    position: absolute;
    top: 20px;
    width: 40px;
    height: 40px;
    background-color: var(--accent-primary);
    border-radius: 50%;
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}

.timeline-item:nth-child(odd) .timeline-icon {
    right: -20px;
}

.timeline-item:nth-child(even) .timeline-icon {
    left: -20px;
    background-color: var(--accent-secondary);
}

.timeline-content h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
}

.timeline-content h4 {
    color: var(--accent-primary);
    font-size: 1rem;
    font-weight: 400;
}

.timeline-date {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.timeline-grade {
    font-weight: bold;
    color: var(--accent-tertiary);
    margin-top: 0.5rem;
}

/* --- Experience Section --- */
.experience-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
}

.experience-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    max-width: 500px; /* Reduced max-width for side-by-side display */
    width: 100%;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-left: 4px solid var(--accent-primary);
}

.experience-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

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

.experience-logo {
    font-size: 2.5rem;
    color: var(--accent-primary);
}

.experience-company h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.experience-company h4 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

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

.experience-description h5 {
    color: var(--accent-secondary);
    margin-bottom: 0.5rem;
}

.experience-list {
    list-style-type: '— ';
    padding-left: 1.5rem;
}

.experience-list li {
    margin-bottom: 0.5rem;
}

/* --- Projects Section --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

.project-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    position: relative;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.project-link {
    position: absolute;
    top: 1rem;
    right: 1rem;
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: color 0.3s ease;
}

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

.project-image {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1rem;
    width: 100%;
    height: 200px;
    overflow: hidden;
    border-radius: 8px;
    border: 2px solid var(--accent-tertiary);
    box-shadow: 0 0 10px rgba(0, 217, 255, 0.5);
}

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

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

.project-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.project-features h5 {
    font-size: 1rem;
    color: var(--accent-secondary);
    margin-bottom: 0.5rem;
}

.project-features ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

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

.tech-tag {
    background-color: var(--bg-primary);
    color: var(--accent-primary);
    font-size: 0.8rem;
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
}

.project-achievement {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: bold;
    color: var(--accent-tertiary);
    margin-top: auto;
}

/* --- Skills Section --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-category {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-category:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.skill-icon {
    font-size: 3rem;
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.skill-category h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.skill-item {
    background-color: var(--bg-primary);
    color: var(--accent-secondary);
    font-size: 0.9rem;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
}

/* --- Certifications Section --- */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.cert-card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
    position: relative; /* Enables positioning for the link */
}

.cert-card:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.cert-link {
    position: absolute;
    top: 1rem;
    right: 1rem;
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: color 0.3s ease;
}

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

.cert-icon {
    font-size: 2.5rem;
    color: var(--accent-tertiary);
    margin-bottom: 1rem;
}

.cert-card h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
}

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

/* --- Participations Section --- */

.participations {
    padding: 20px 0;
}

.participations-content {
    display: flex;
    flex-direction: column;
    align-items: center;              /* centers entire content */
    gap: 25px;
    margin-top: 40px;
}

/* Card Styling */
.participation-card {
    display: flex;
    align-items: center;
    gap: 20px;
    width: 100%;
    max-width: 800px;                /* keeps it centered & not too wide */
    padding: 20px 25px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

/* Hover Effect */
.participation-card:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Icon */
.participation-icon {
    font-size: 30px;
    color: var(--accent-primary);
    min-width: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Text Content */
.participation-details {
    flex: 1;
}

.participation-details h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.participation-details p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Badge (Optional) */
.badge {
    display: inline-block;
    margin-top: 8px;
    padding: 4px 12px;
    font-size: 0.75rem;
    background: var(--accent-primary);
    color: #fff;
    border-radius: 20px;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    .participation-card {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
    }

    .participation-icon {
        margin-bottom: 10px;
    }
}


/* --- Contact Section --- */
.contact-content {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
    justify-content: center;   /* 🔥 THIS centers horizontally */
}

.contact-info {
    flex: 1 1 400px;
    max-width: 600px;          /* keeps it nicely centered */
    text-align: center;        /* centers text */
}

.contact-info h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.contact-info p {
    margin-bottom: 2rem;
}

.contact-items {
    display: flex;
    flex-direction: column;
    align-items: center;   /* 🔥 centers all items */
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;  /* centers icon + text block */
    gap: 1rem;
}

.contact-icon {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.contact-details h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.contact-details a,
.contact-details p {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
}

.contact-form {
    flex: 1 1 400px;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    color: var(--text-secondary);
    border-radius: 8px;
    font-family: var(--font-family);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 5px rgba(20, 184, 166, 0.5);
}

/* --- Footer --- */
.footer {
    background-color: var(--bg-secondary);
    padding: 2rem 1rem;
    text-align: center;
}

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

.footer p {
    font-size: 0.9rem;
}

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

.footer-social a {
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

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

/* --- Animations --- */
@keyframes glowing-border {
    from {
        box-shadow: 0 0 10px var(--accent-primary);
    }
    to {
        box-shadow: 0 0 20px var(--accent-primary), 0 0 30px var(--accent-tertiary);
    }
}

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

@keyframes slideInFromLeft {
    from { transform: translateX(-100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    .navbar {
        padding: 0.5rem 1rem;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: var(--bg-secondary);
        position: absolute;
        top: 100%;
        left: 0;
        padding: 1rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        text-align: center;
        width: 100%;
    }
    
    .nav-links a {
        display: block;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-toggle {
        display: flex;
    }

    .hero-content, .about-content, .contact-content, .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-text {
        order: 2;
    }

    .hero-image {
        order: 1;
    }

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

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        left: 0;
        padding-left: 40px;
    }

    .timeline-item:nth-child(even) {
        left: 0;
        border-right: none;
        border-left: 3px solid var(--accent-primary);
    }

    .timeline-item:nth-child(even) .timeline-icon {
        left: 3px;
        background-color: var(--accent-primary);
    }
    
    .timeline-item:nth-child(odd) .timeline-icon {
        left: 3px;
    }

    .experience-card, .project-card, .skill-category, .cert-card, .info-item {
        margin: 0 auto;
    }

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