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

:root {
    --primary-color: #5fa8d3;
    --secondary-color: #4a90b8;
    --accent-color: #7ec4e8;
    --dark-bg: #2c3e50;
    --light-bg: #ecf0f1;
    --text-dark: #2c3e50;
    --text-light: #ffffff;
    --card-bg: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    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);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 0.75rem;
    border-radius: 5px;
}

.nav-links a:hover {
    color: white;
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

.nav-links a.active {
    color: white;
    background-color: var(--primary-color);
}

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-light);
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-text {
    animation: fadeInLeft 1s ease;
}

.headline {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.subheadline {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

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

.btn {
    padding: 0.875rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

.hero-image {
    animation: fadeInRight 1s ease;
}

.profile-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    color: var(--text-dark);
    text-align: center;
}

.profile-picture {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 1.5rem auto;
    display: block;
    border: 4px solid var(--primary-color);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.profile-header h2 {
    color: var(--primary-color);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.description {
    color: #666;
    line-height: 1.6;
}

/* Section Styling */
section {
    padding: 5rem 2rem;
}

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

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--primary-color);
    margin: 1rem auto;
    border-radius: 2px;
}

/* About Section */
.about {
    background: white;
    position: relative;
    z-index: 2;
}

.bio-content {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 2;
}

.bio-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 2;
}

.bio-content p:last-child {
    margin-bottom: 0;
}

.bio-content p:first-child {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1.25rem;
}

/* Experience Section */
.experience {
    background: var(--light-bg);
    position: relative;
    z-index: 1;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-color);
    transform: translateX(-50%);
    z-index: 0;
}

.timeline-item {
    margin-bottom: 4rem;
    position: relative;
    clear: both;
    overflow: visible;
}

.timeline-item::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 2rem;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border: 4px solid white;
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.timeline-content {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    width: calc(50% - 3rem);
    margin-left: auto;
    transition: transform 0.3s ease;
    position: relative;
    z-index: 1;
}

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

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    z-index: 3;
}

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

.company {
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

.timeline-content .description {
    line-height: 1.6;
}

/* Education Section */
.education {
    background: white;
    padding: 2.5rem 2rem;
}

.education .section-title {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    max-width: 800px;
    margin: 0 auto;
}

.education-card {
    background: var(--card-bg);
    padding: 1.25rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border-left: 3px solid var(--primary-color);
}

.education-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.education-card h3 {
    color: var(--text-dark);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.school {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0;
}

.education-card .description {
    color: #666;
    line-height: 1.5;
    font-size: 0.9rem;
}

/* Work Section */
.work {
    background: white;
}

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

.work-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
}

.work-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.work-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
    min-height: 80px;
}

.work-header h3 {
    color: var(--text-dark);
    font-size: 1.25rem;
    margin: 0;
    flex: 1;
    padding-right: 0.5rem;
}

.tag {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
}

.work-card p {
    line-height: 1.6;
    margin: 0;
    flex-grow: 1;
}

/* Expertise Section */
.expertise {
    background: var(--light-bg);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.expertise-item {
    background: var(--card-bg);
    padding: 1.25rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s ease;
}

.expertise-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.expertise-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.expertise-item p {
    color: #666;
    line-height: 1.5;
    font-size: 0.95rem;
}

/* Blog Section */
.blog {
    background: var(--light-bg);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.blog-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    height: 100%;
}

.blog-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

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

.blog-card p {
    line-height: 1.6;
    color: #666;
}

/* Contact Section */
.contact {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-light);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-description {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.contact-methods {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.contact-methods a:hover {
    opacity: 0.8;
}

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

/* Animations */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .expertise-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }

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

    .headline {
        font-size: 2rem;
    }

    .cta-buttons {
        justify-content: center;
        flex-direction: column;
    }

    .timeline::before {
        left: 0;
    }

    .timeline-item::after {
        left: 0;
        transform: translateX(-50%);
    }

    .timeline-content,
    .timeline-item:nth-child(odd) .timeline-content {
        width: calc(100% - 3rem);
        margin-left: 2rem;
        margin-right: 0;
    }

    .work-grid,
    .education-grid,
    .blog-grid,
    .expertise-grid {
        grid-template-columns: 1fr;
    }

    .contact-methods {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .nav-content {
        flex-direction: column;
        gap: 1rem;
    }

    .headline {
        font-size: 1.75rem;
    }

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