/* Reset and Base Styles */
:root {
    --primary-color: #2563eb;
    --secondary-color: #3b82f6;
    --text-color: #1f2937;
    --bg-color: #ffffff;
    --card-bg: #f3f4f6;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --primary-color: #60a5fa;
    --secondary-color: #93c5fd;
    --text-color: #f3f4f6;
    --bg-color: #111827;
    --card-bg: #1f2937;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: var(--transition);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.12); /* More transparent for light mode */
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.18);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.10);
    z-index: 1000;
    transition: var(--transition);
}

[data-theme="dark"] .navbar {
    background: rgba(17, 24, 39, 0.22); /* More transparent for dark mode */
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 8px 32px 0 rgba(17, 24, 39, 0.25);
}


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

.nav-links a {
    margin-left: 2rem;
    text-decoration: none;
    color: var(--text-color);
    transition: var(--transition);
}

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

.theme-toggle {
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background-color: var(--text-color);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0 2rem;
    text-align: center;
}

#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s ease 0.2s forwards;
}

.hero h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s ease 0.4s forwards;
}

.hero p {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s ease 0.6s forwards;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1s ease 0.8s forwards;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

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

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

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* About Section */
.about {
    padding: 6rem 2rem;
    background-color: var(--card-bg);
}

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

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

.timeline {
    margin-top: 2rem;
}

.timeline-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.year {
    font-weight: bold;
    color: var(--primary-color);
}

.about-image img {
    width: 220px;
    height: 300px;
    object-fit: cover;
    border-radius: 50% / 40%;
    display: block;
    margin: 0 auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* Skills Section */
.skills {
    padding: 6rem 2rem;
}

.skills-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-category {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

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

.skill-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 1rem;
}

.skill-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.skill-item i {
    font-size: 2rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.skill-item:hover i {
    transform: scale(1.2);
}

/* Projects Section */
.projects {
    padding: 6rem 2rem;
    background-color: var(--card-bg);
}

.projects-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.5rem 1.5rem;
    border: none;
    background: none;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn.active {
    color: var(--primary-color);
    font-weight: bold;
}

.projects-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

/* DSA Section */
.dsa {
    padding: 6rem 2rem;
}

.dsa-content {
    max-width: 1200px;
    margin: 0 auto;
}

.dsa-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.stat-card .number {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-top: 1rem;
}

.dsa-platforms {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.platform-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-color);
    padding: 1rem 2rem;
    border-radius: 50px;
    background-color: var(--card-bg);
    transition: var(--transition);
}

.platform-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* Contact Section */
.contact {
    padding: 6rem 2rem;
    background-color: var(--card-bg);
}

.contact-container {
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    background-color: var(--bg-color);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.form-group {
    position: relative;
    margin-bottom: 2rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--card-bg);
    border-radius: 10px;
    background: none;
    color: var(--text-color);
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group label {
    position: absolute;
    left: 1rem;
    top: 1rem;
    color: var(--text-color);
    transition: var(--transition);
    pointer-events: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:valid + label,
.form-group textarea:valid + label {
    top: -0.5rem;
    left: 0.5rem;
    font-size: 0.8rem;
    background-color: var(--bg-color);
    padding: 0 0.5rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
}

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

.social-link:hover {
    color: var(--primary-color);
    transform: translateY(-5px) scale(1.1);
}

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

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    margin: 0 1rem;
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

    .cta-buttons {
        flex-direction: column;
    }

    .projects-filter {
        flex-wrap: wrap;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Contact Info in Hero Section */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin: 1.5rem 0;
}

.contact-info a {
    color: var(--text-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.contact-info a:hover {
    color: var(--primary-color);
}

/* Education Section */
.education {
    padding: 6rem 2rem;
    background-color: var(--bg-color);
}

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

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

.education-item {
    margin-bottom: 3rem;
    position: relative;
}

.education-content {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    position: relative;
    width: calc(50% - 2rem);
    margin-left: auto;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.education-item:nth-child(even) .education-content {
    margin-left: 0;
    margin-right: auto;
}

.education-content::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 20px;
    height: 20px;
    background-color: var(--primary-color);
    border-radius: 50%;
    transform: translateY(-50%);
}

.education-item:nth-child(odd) .education-content::before {
    left: -3rem;
}

.education-item:nth-child(even) .education-content::before {
    right: -3rem;
}

.education-content h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.education-content .institution {
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.education-content .duration {
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.education-content .grade {
    font-weight: bold;
}

.education-content:hover {
    transform: translateX(5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.education-item:nth-child(even) .education-content:hover {
    transform: translateX(-5px);
}

/* Certifications Section */
.certifications {
    padding: 6rem 2rem;
    background-color: var(--card-bg);
}

.certifications-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.certification-card {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.certification-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.certification-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    transition: transform 0.3s ease, color 0.3s ease;
}

.certification-card:hover i {
    transform: scale(1.2);
    color: var(--secondary-color);
}

.certification-card h3 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

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

/* Project Cards Enhancement */
.project-card {
    background-color: var(--bg-color);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.project-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.project-card h3 {
    padding: 1.5rem 1.5rem 0.5rem;
    color: var(--primary-color);
}

.project-card p {
    padding: 0 1.5rem 1rem;
    color: var(--text-color);
    font-size: 0.9rem;
}

.project-tags {
    padding: 0 1.5rem 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.project-tags span {
    background-color: var(--card-bg);
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--primary-color);
}

.project-links {
    padding: 0 1.5rem 1.5rem;
    display: flex;
    gap: 1rem;
}

/* Responsive Design Updates */
@media (max-width: 768px) {
    .education-timeline::before {
        left: 1rem;
    }

    .education-content {
        width: calc(100% - 3rem);
        margin-left: 3rem !important;
    }

    .education-item:nth-child(odd) .education-content::before,
    .education-item:nth-child(even) .education-content::before {
        left: -2rem;
    }

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

    .project-links {
        flex-direction: column;
    }

    .education-content:hover {
        transform: none;
    }
    
    .education-item:nth-child(even) .education-content:hover {
        transform: none;
    }
    
    .certification-card:hover {
        transform: translateY(-5px);
    }
}

/* Dark Mode Enhancements */
[data-theme="dark"] .project-card,
[data-theme="dark"] .certification-card,
[data-theme="dark"] .education-content {
    background-color: var(--card-bg);
}

[data-theme="dark"] .project-tags span {
    background-color: var(--bg-color);
}

/* Global Text Styling */
p {
    text-align: justify;
    line-height: 1.8;
    margin-bottom: 1rem;
}

/* Navigation Link Hover Effects */
.nav-links a {
    position: relative;
    transition: color 0.3s ease;
}

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

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

/* Enhanced Button Animations */
.btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

/* Skill Item Animations */
.skill-item {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.skill-item i {
    transition: transform 0.3s ease;
}

.skill-item:hover i {
    transform: scale(1.2);
}

/* Project Card Animations */
.project-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.project-card img {
    transition: transform 0.5s ease;
}

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

/* Education Timeline Animations */
.education-content {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.education-content:hover {
    transform: translateX(5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.education-item:nth-child(even) .education-content:hover {
    transform: translateX(-5px);
}

/* Certification Card Animations */
.certification-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.certification-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.certification-card i {
    transition: transform 0.3s ease, color 0.3s ease;
}

.certification-card:hover i {
    transform: scale(1.2);
    color: var(--secondary-color);
}

/* Contact Form Animations */
.form-group input,
.form-group textarea {
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Social Links Animation */
.social-link {
    transition: transform 0.3s ease, color 0.3s ease;
}

.social-link:hover {
    transform: translateY(-5px) scale(1.1);
}

/* Loading Animation */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--card-bg);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Scroll Animations */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Animation Adjustments */
@media (max-width: 768px) {
    .education-content:hover {
        transform: none;
    }
    
    .education-item:nth-child(even) .education-content:hover {
        transform: none;
    }
    
    .certification-card:hover {
        transform: translateY(-5px);
    }
}