/* Color Variables - White to Gray to Yellow gradient */
:root {
    --primary-yellow: #FFDA44;
    --primary-gray: #7D7D7D;
    --dark-gray: #4A4A4A;
    --light-gray: #F5F5F5;
    --white: #FFFFFF;
    --black: #1A1A1A;
    --accent-yellow: #FFE066;
    --text-gray: #666666;
    --border-gray: #E0E0E0;
    --shadow: rgba(0, 0, 0, 0.1);
    --gradient-bg: linear-gradient(135deg, #FFFFFF 0%, #F5F5F5 50%, #FFDA44 100%);
    --gradient-gray: linear-gradient(135deg, #7D7D7D 0%, #9A9A9A 100%);
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--black);
    background-color: var(--white);
    overflow-x: hidden;
}

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

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

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-yellow);
}

.nav-name {
    font-weight: 600;
    color: var(--black);
    font-size: 1.1rem;
}

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

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

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

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

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

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-bg);
    padding-top: 80px;
}

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

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

.hero-title {
    margin-bottom: 1.5rem;
}

.title-main {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--black);
    line-height: 1.1;
}

.title-subtitle {
    display: block;
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--primary-yellow);
    margin-top: 0.5rem;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
    line-height: 1.7;
}

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

.badge {
    background: var(--gradient-gray);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 2px 10px rgba(125, 125, 125, 0.3);
}

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

.btn {
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-gray);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(125, 125, 125, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(125, 125, 125, 0.6);
}

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

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

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

.hero-avatar {
    width: 350px;
    height: 350px;
    border-radius: 50%;
    object-fit: cover;
    border: 8px solid var(--primary-yellow);
    box-shadow: 0 20px 40px var(--shadow);
    transition: transform 0.3s ease;
}

.hero-avatar:hover {
    transform: scale(1.05);
}

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--black);
    position: relative;
}

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

.section-subtitle {
    text-align: center;
    color: var(--text-gray);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

/* About Section */
.about {
    background: var(--gradient-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.about-intro {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.highlight-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px var(--shadow);
    transition: transform 0.3s ease;
}

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

.highlight-item i {
    font-size: 2.5rem;
    color: var(--primary-yellow);
    margin-bottom: 1rem;
}

.highlight-item h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--black);
}

.highlight-item p {
    color: var(--text-gray);
}

.about-motto {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow);
    height: fit-content;
}

.about-motto h3 {
    color: var(--black);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.motto-list {
    list-style: none;
}

.motto-list li {
    padding: 0.5rem 0;
    color: var(--text-gray);
    position: relative;
    padding-left: 1.5rem;
}

.motto-list li::before {
    content: '✨';
    position: absolute;
    left: 0;
}

/* Blogs Section */
.blogs {
    background: var(--gradient-bg);
}

.blog-section {
    margin-bottom: 3rem;
}

.blog-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.blog-section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--black);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.view-all-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--gradient-gray);
    color: var(--white);
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.view-all-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(125, 125, 125, 0.4);
}

.blog-section-title i {
    color: var(--primary-yellow);
}

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

.blog-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border-gray);
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.blog-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--light-gray);
}

.blog-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-gray);
}

.blog-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--black);
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.blog-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-gray);
}

.blog-source {
    background: var(--primary-yellow);
    color: var(--black);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-weight: 500;
    font-size: 0.8rem;
}

.blog-content {
    padding: 1.5rem;
}

.blog-excerpt {
    color: var(--text-gray);
    line-height: 1.6;
    margin-bottom: 1rem;
}

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

.reading-time {
    font-size: 0.9rem;
    color: var(--text-gray);
    font-style: italic;
}

.blog-link {
    color: var(--primary-yellow);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

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

.blog-link-grey {
    color: var(--dark-gray);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.blog-link-grey:hover {
    color: var(--dark-gray);
}

.blog-sources {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.source-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--gradient-gray);
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.source-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(125, 125, 125, 0.4);
}

/* Experience Section */
.experience {
    background: var(--gradient-bg);
}

.timeline {
    max-width: 800px;
    margin: 3rem auto 0;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: var(--primary-yellow);
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 20px;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--primary-yellow);
    border-radius: 50%;
    border: 4px solid var(--white);
    box-shadow: 0 0 0 4px var(--primary-yellow);
}

.timeline-date {
    flex: 0 0 200px;
    text-align: center;
    font-weight: 600;
    color: var(--primary-yellow);
    font-size: 1.1rem;
    padding: 1rem;
}

.timeline-content {
    flex: 1;
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px var(--shadow);
    margin: 0 2rem;
}

.timeline-content h3 {
    color: var(--black);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.company {
    color: var(--primary-yellow);
    font-weight: 600;
    margin-bottom: 1rem;
}

.timeline-content p:last-child {
    color: var(--text-gray);
    line-height: 1.6;
}

/* Achievements Section */
.achievements {
    background: var(--gradient-bg);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.achievement-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px var(--shadow);
    border: 1px solid var(--border-gray);
    transition: all 0.3s ease;
}

.achievement-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.achievement-card.featured {
    border: 2px solid var(--primary-yellow);
    background: linear-gradient(135deg, rgba(125, 125, 125, 0.1) 0%, rgba(125, 125, 125, 0.05) 100%);
}

.achievement-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    background: var(--gradient-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.achievement-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.achievement-card h3 {
    font-size: 1.1rem;
    color: var(--black);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.achievement-year {
    color: var(--primary-yellow);
    font-weight: 600;
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
}

.achievement-year-grey {
    color: var(--dark-gray);
    font-weight: 600;
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
}

.achievement-card p:last-child {
    color: var(--text-gray);
    line-height: 1.5;
    font-size: 0.9rem;
}

/* Contact Section */
/* Contact Section */
.contact {
    background: var(--gradient-bg);
}

.contact-content {
    text-align: center;
    margin-top: 3rem;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    font-size: 1.1rem;
    color: var(--text-gray);
}

.contact-item i {
    color: var(--primary-yellow);
    font-size: 1.3rem;
}

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

.social-link {
    width: 60px;
    height: 60px;
    background: var(--gradient-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--white);
    font-size: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(125, 125, 125, 0.3);
}

.social-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(125, 125, 125, 0.5);
}

/* Footer */
.footer {
    background: var(--black);
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
}

/* Loading Animation */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-gray);
    border-top: 4px solid var(--primary-yellow);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

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

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

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

    .hero-content .hero-image {
        order: -1;
    }

    .hero-avatar {
        width: 250px;
        height: 250px;
    }

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

    .title-subtitle {
        font-size: 1.2rem;
    }

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

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

    .timeline-item {
        flex-direction: column;
        padding-left: 50px;
    }

    .timeline-item:nth-child(odd) {
        flex-direction: column;
    }

    .timeline-item::before {
        left: 20px;
        transform: translateX(-50%);
    }

    .timeline-date {
        text-align: left;
        flex: none;
        padding: 0 0 1rem 0;
    }

    .timeline-content {
        margin: 0;
    }

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

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

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

    .blog-sources {
        flex-direction: column;
        align-items: center;
    }
}

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

    section {
        padding: 3rem 0;
    }

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

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

    .hero-avatar {
        width: 200px;
        height: 200px;
    }

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }

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

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

/* Education Section */
.education {
    background: var(--gradient-bg);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.education-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px var(--shadow);
    transition: transform 0.3s ease;
}

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

.education-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    background: var(--gradient-gray);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.education-icon i {
    font-size: 2rem;
    color: var(--white);
}

.education-card h3 {
    font-size: 1.3rem;
    color: var(--black);
    margin-bottom: 0.5rem;
}

.institution {
    color: var(--primary-yellow);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.year {
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

.grade {
    color: var(--primary-yellow);
    font-weight: 600;
}

/* Badges Section */
.badges {
    background: var(--gradient-bg);
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.badge-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border-gray);
}

.badge-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.badge-image {
    width: 120px;
    height: 120px;
    margin: 0 auto 1rem;
    border-radius: 10px;
    overflow: hidden;
}

.badge-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.badge-content h3 {
    font-size: 1.1rem;
    color: var(--black);
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.badge-issuer {
    color: var(--primary-yellow);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

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

.badges-footer {
    text-align: center;
    margin-top: 3rem;
}

.view-all-badges {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: var(--gradient-gray);
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(125, 125, 125, 0.3);
}

.view-all-badges:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(125, 125, 125, 0.5);
}

/* Publications Section */
.publications {
    background: var(--gradient-bg);
}

.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.publication-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px var(--shadow);
    transition: all 0.3s ease;
}

.publication-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.publication-image {
    height: 200px;
    overflow: hidden;
}

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

.publication-content {
    padding: 1.5rem;
}

.publication-content h3 {
    font-size: 1.2rem;
    color: var(--black);
    margin-bottom: 0.5rem;
}

.publication-content h3 a {
    color: var(--black);
    text-decoration: none;
    transition: color 0.3s ease;
}

.publication-content h3 a:hover {
    color: var(--primary-yellow);
}

.publication-year {
    color: var(--primary-yellow);
    font-weight: 600;
    margin-bottom: 1rem;
}

.publication-content p:last-child {
    color: var(--text-gray);
    line-height: 1.6;
}

/* Focus styles for accessibility */
.nav-link:focus,
.btn:focus,
.social-link:focus {
    outline: 2px solid var(--primary-yellow);
    outline-offset: 2px;
}