/* Variables */
:root {
    --primary-color: #2563eb;
    --secondary-color: #1e3a8a;
    --accent-color: #3b82f6;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --surface-color-light: #f1f5f9;
    --text-color: #1e293b;
    --text-color-secondary: #475569;
    --border-radius: 8px;
    --box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
    --section-padding: 70px 0;
}

/* Reset & Base Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px; /* Increased to ensure sections are visible below header */
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition);
}

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

ul {
    list-style-type: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    border: none;
    outline: none;
}

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

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

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

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

/* Canvas Container (for Three.js) */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

header.scrolled {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
    width: 95%;
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.logo .name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1px;
}

.animated-tagline {
    font-size: 0.65rem;
    font-style: normal;
    font-weight: 400;
    color: var(--text-color-secondary);
    margin-top: 0;
    display: block;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    width: 0;
    animation: type 4s steps(60, end) forwards;
    letter-spacing: 0.05px;
    opacity: 0.7;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.animated-tagline span {
    font-size: 0.65rem;
}

@keyframes type {
    from { width: 0; }
    to { width: 100%; }
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    color: var(--text-color);
    font-weight: 500;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--primary-color);
    transition: var(--transition);
}

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

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

.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 5px;
    transition: var(--transition);
}

/* Hero Section */
.about-header {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 60px;
    flex-wrap: wrap;
    justify-content: center;
}

.profile-image {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    overflow: hidden;
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.5s ease;
    flex-shrink: 0;
    position: relative;
}

.profile-image:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.profile-image:hover img {
    transform: scale(1.08);
}

.about-title {
    text-align: left;
}

.about-title h1 {
    font-size: 3rem;
    margin-bottom: 10px;
    color: var(--text-color);
}

.about-title h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--accent-color);
}

.cta-buttons {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

/* Section Styles */
.section {
    padding: var(--section-padding);
}

#about {
    padding-top: 140px; /* Additional top padding to account for fixed header */
}

#contact {
    padding-top: 60px;
    padding-bottom: 30px;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

#contact .section-title {
    margin-bottom: 30px;
}

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

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
    align-items: start;
}

.about-text p {
    margin-bottom: 1rem;
}

.about-details h3 {
    margin-bottom: 15px;
}

.about-details ul li {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.about-details ul li i {
    color: var(--primary-color);
    margin-right: 10px;
    width: 20px;
}

.expertise h3 {
    text-align: center;
    margin-bottom: 30px;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.expertise-item {
    background-color: var(--surface-color);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: var(--transition);
}

.expertise-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.expertise-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.expertise-item h4 {
    margin-bottom: 10px;
}

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

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: var(--surface-color-light);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
    left: 0;
    margin-bottom: 40px;
}

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

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: var(--primary-color);
    border: 4px solid var(--surface-color);
    border-radius: 50%;
    top: 15px;
    z-index: 1;
}

.timeline-item:nth-child(odd)::after {
    right: -10px;
}

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

.timeline-content {
    background-color: var(--surface-color);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.timeline-content h3 {
    margin-bottom: 5px;
    color: var(--primary-color);
}

.timeline-content h4 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 10px;
    color: var(--text-color-secondary);
}

.timeline-date {
    display: inline-block;
    padding: 5px 10px;
    background-color: var(--surface-color-light);
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 15px;
}

.timeline-content ul {
    margin-top: 15px;
    list-style-type: disc;
    padding-left: 20px;
}

.timeline-content ul li {
    margin-bottom: 5px;
}

.skill-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 15px;
}

.skill-badge {
    background-color: var(--surface-color-light);
    color: var(--text-color);
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
}

.skill-badge i {
    margin-right: 4px;
    font-size: 0.8rem;
}

/* Skills Section */
.skills-container {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.skills-category h3 {
    margin-bottom: 20px;
    text-align: center;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}

.skill-item {
    background-color: var(--surface-color);
    padding: 10px 20px;
    border-radius: 50px;
    display: inline-block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-color);
    border: 1px solid var(--surface-color-light);
    transition: var(--transition);
    cursor: default;
}

.skill-item:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Projects Section */
.certificates {
    margin-bottom: 50px;
}

.certificates h3, .projects h3 {
    text-align: center;
    margin-bottom: 30px;
}

.certificate-item {
    display: flex;
    align-items: center;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.certificate-logo {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin-right: 20px;
    flex-shrink: 0;
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.certificate-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.certificate-content h4 {
    margin-bottom: 10px;
}

.certificate-content p {
    margin-bottom: 5px;
    font-size: 0.9rem;
    color: var(--text-color-secondary);
}


.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.project-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

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

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

.project-content {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-content h4 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.project-date {
    font-size: 0.8rem;
    color: var(--text-color-secondary);
    margin-bottom: 15px;
}

.project-link {
    display: inline-block;
    margin-top: 15px;
    font-weight: 600;
}

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

.education-item {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: var(--box-shadow);
    position: relative;
}

.education-item::before {
    content: '';
    position: absolute;
    width: 2px;
    height: calc(100% + 30px);
    background-color: var(--surface-color-light);
    top: 0;
    left: 30px;
    z-index: -1;
}

.education-item:last-child::before {
    height: 0;
}

.education-item h3 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

.education-item h4 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 10px;
    color: var(--text-color-secondary);
}

.edu-date, .edu-degree {
    font-size: 0.9rem;
    color: var(--text-color-secondary);
    margin-bottom: 5px;
}

/* Interests Section */
.interests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.interest-item {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 25px;
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.interest-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.interest-item h3 {
    margin-bottom: 10px;
}

/* Recommendations Section */
.recommendations-slider {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.recommendation-card {
    display: none;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 35px;
    box-shadow: var(--box-shadow);
    margin-bottom: 30px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.recommendation-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.recommendation-card.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.recommendation-text {
    font-style: italic;
    margin-bottom: 20px;
    position: relative;
    padding: 0 20px;
}

.recommendation-text::before {
    content: '"';
    font-size: 4rem;
    position: absolute;
    top: -20px;
    left: -10px;
    color: var(--surface-color-light);
    opacity: 0.5;
}

.recommender {
    display: flex;
    align-items: center;
    margin-top: 20px;
}

.recommender-image {
    width: 65px;
    height: 65px;
    border-radius: 50%;
    overflow: hidden;
    margin-right: 18px;
    position: relative;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

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

.recommendation-card:hover .recommender-image img {
    transform: scale(1.1);
}

.recommender-info h4 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

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

.slider-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}

.prev-btn, .next-btn {
    background-color: var(--surface-color-light);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
}

.prev-btn:hover, .next-btn:hover {
    background-color: var(--primary-color);
}

.slider-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 0 20px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--surface-color-light);
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background-color: var(--primary-color);
}

/* Contact Section */
.contact-card {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.contact-card-content {
    padding: 25px 30px;
}

.contact-message {
    text-align: center;
    margin-bottom: 20px;
}

.contact-message h3 {
    margin-bottom: 8px;
    color: var(--text-color);
    font-size: 1.1rem;
}

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

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
    padding: 15px;
    background-color: var(--surface-color-light);
    border-radius: var(--border-radius);
}

.contact-item-compact {
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-item-compact i {
    font-size: 1rem;
    color: var(--primary-color);
    width: 20px;
    text-align: center;
}

.contact-item-compact a {
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

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

.contact-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
}

.social-links {
    display: flex;
    gap: 8px;
}

.social-link {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 35px;
    height: 35px;
    background-color: var(--surface-color-light);
    border-radius: 50%;
    color: var(--text-color);
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.email-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.email-btn i {
    margin-right: 8px;
}

.email-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

/* Footer */
footer {
    background-color: var(--surface-color);
    padding: 30px 0;
    margin-top: 40px;
}

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

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--text-color-secondary);
}

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

/* Animation for scroll reveal */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.show {
    opacity: 1;
    transform: translateY(0);
}

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

/* Responsive Styles */
@media (max-width: 992px) {
    .about-title h1 {
        font-size: 2.5rem;
    }
    
    .about-title h2 {
        font-size: 1.5rem;
    }
    
    .about-header {
        flex-direction: column;
        text-align: center;
    }
    
    .about-title {
        text-align: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .contact-card {
        max-width: 100%;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
        left: 0 !important;
    }
    
    .timeline::after {
        left: 30px;
    }
    
    .timeline-item::after {
        left: 20px !important;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 0.9rem;
    }
    
    .about-title h1 {
        font-size: 2.2rem;
    }
    
    .about-title h2 {
        font-size: 1.3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .burger {
        display: block;
    }
    
    .logo {
        max-width: 70%;
    }
    
    .logo span {
        font-size: 1.2rem;
    }
    
    .animated-tagline, .animated-tagline span {
        font-size: 0.55rem;
        max-width: 180px;
    }
    
    .nav-links {
        position: absolute;
        right: 0;
        top: 70px;
        height: calc(100vh - 70px);
        background-color: var(--background-color);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        width: 50%;
        padding-top: 40px;
        transform: translateX(100%);
        transition: transform 0.5s ease-in;
        z-index: 1;
    }
    
    .nav-links.active {
        transform: translateX(0%);
    }
    
    .nav-link {
        opacity: 0;
    }
    
    .nav-link.fade {
        opacity: 1;
        transition: opacity 0.5s ease;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .cta-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-links {
        width: 70%;
    }
    
    .expertise-grid,
    .project-grid,
    .interests-grid {
        grid-template-columns: 1fr;
    }
    
    .project-image img {
        height: 200px;
    }
    
    .contact-actions {
        flex-direction: column;
        gap: 15px;
    }
    
    .social-links {
        margin-top: 5px;
        justify-content: center;
    }
    
    .email-btn {
        width: 100%;
    }
}