/* CSS Variables for Theme */
:root {
    --navbar-height: 80px;
    --primary-color: #4a90e2;
    --secondary-color: #357abd;
    --accent-color: #f39c12;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --border-color: #e9ecef;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 5px 20px rgba(0, 0, 0, 0.15);
    --gradient: linear-gradient(135deg, #4a90e2 0%, #357abd 100%);
}

[data-theme="dark"] {
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-light: #999999;
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-card: #3a3a3a;
    --border-color: #4a4a4a;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 5px 20px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: all 0.3s ease;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--navbar-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .navbar {
    background: rgba(26, 26, 26, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-logo h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

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

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--primary-color);
}

.theme-toggle {
    background: var(--primary-color);
    border: none;
    color: white;
    padding: 8px 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background: var(--secondary-color);
    transform: scale(1.1);
}

/* Hero Section */
.hero {
    padding-top: calc(var(--navbar-height) + 40px);
    background: var(--gradient);
    color: white;
    padding: 140px 0 0; /* Increase top padding, remove bottom padding */
    text-align: center;
    min-height: 100vh; /* Ensure full viewport height */
    display: flex;
    align-items: center;
}

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

.profile-image-container {
    margin-bottom: 2rem;
}

.profile-image {
    width: 200px;
    height: 200px;
    margin: 0 auto;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid rgba(255, 255, 255, 0.3);
    transition: transform 0.3s ease;
    cursor: pointer;
}

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

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

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

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

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

.btn-primary:hover {
    background: transparent;
    color: white;
    border-color: white;
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

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

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

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

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary-color);
}

/* About Section */
.about {
    background: var(--bg-secondary);
    position: relative;
    z-index: 1;
    margin-top: 0;
}

.about-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

/* Education Section */
.education-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    position: relative;
    padding: 2rem 0;
    border-left: 3px solid var(--primary-color);
    margin-left: 20px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 2rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary-color);
}

.timeline-content {
    padding-left: 2rem;
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-left: 1rem;
    transition: transform 0.3s ease;
}

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

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

.timeline-content h4 {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.timeline-date {
    color: var(--text-light);
    font-style: italic;
}

.achievement {
    color: var(--accent-color);
    font-weight: 600;
}

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

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.skill-category {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

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

.skill-category h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.skill-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.skill-tag:hover {
    transform: scale(1.05);
    background: var(--secondary-color);
}

/* Experience Section */
.experience-timeline {
    max-width: 800px;
    margin: 0 auto;
}

/* Projects Section */
.projects {
    background: var(--bg-secondary);
}

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

.project-card {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.project-card.ongoing {
    border: 2px solid var(--accent-color);
}

.project-header {
    margin-bottom: 1rem;
}

.project-header h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-badge {
    background: var(--accent-color);
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 10px;
    font-size: 0.7rem;
}

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

.tech-tag {
    background: var(--bg-secondary);
    padding: 0.2rem 0.6rem;
    border-radius: 15px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

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

.github-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.github-link:hover {
    color: var(--secondary-color);
}

.coming-soon {
    color: var(--text-light);
    font-style: italic;
}

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

.cert-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

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

.cert-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.cert-provider {
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.cert-description {
    color: var(--text-secondary);
}

/* Events Section */
.events {
    background: var(--bg-secondary);
}

.events-list {
    max-width: 800px;
    margin: 0 auto;
}

.event-item {
    background: var(--bg-card);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
    transition: transform 0.3s ease;
}

.event-item:hover {
    transform: translateX(5px);
}

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

.event-item p {
    color: var(--text-secondary);
}

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

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-content: center;
}

.contact-item i {
    font-size: 2rem;
    color: var(--primary-color);
}

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

.contact-item p {
    color: var(--text-secondary);
}

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

.social-link {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 50px !important;
    height: 50px !important;
    background: var(--primary-color) !important;
    color: white !important;
    border-radius: 50% !important;
    text-decoration: none !important;
    font-size: 1.5rem !important;
    transition: all 0.3s ease !important;
    pointer-events: auto !important;
    position: relative !important;
    z-index: 999 !important;
}

.social-link:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer p {
    color: var(--text-light);
}

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

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

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

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

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

    .contact-info {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .contact-item {
        justify-content: center;
    }

    .timeline-content {
        margin-left: 0;
        padding-left: 1rem;
    }

    .timeline-item {
        margin-left: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    section {
        padding: 60px 0;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .profile-image {
        width: 150px;
        height: 150px;
    }

    .timeline-content {
        padding: 1rem;
    }

    .nav-container {
        padding: 1rem 15px;
    }

    .skill-category,
    .project-card,
    .cert-card {
        padding: 1.5rem;
    }
}

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

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

.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

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

.pulse {
    animation: pulse 2s infinite;
}

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

.loading {
    animation: spin 1s linear infinite;
}

/* Typing effect */
.typing::after {
    content: '|';
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

/* Mobile menu styles (for future mobile menu implementation) */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
}

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

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Print styles */
@media print {
    .navbar,
    .theme-toggle,
    .hero-buttons,
    .social-links {
        display: none;
    }
    
    body {
        color: #000;
        background: #fff;
    }
    
    section {
        padding: 20px 0;
        page-break-inside: avoid;
    }
}