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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #333;
    --text-light: #666;
    --bg-light: #f8f9fa;
    --bg-card: #ffffff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow);
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    transition: var(--transition);
}

.navbar.scrolled .nav-logo {
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #fff;
    transition: var(--transition);
}

.navbar.scrolled .nav-menu a {
    color: var(--primary-color);
}

.navbar.scrolled .nav-menu a::after {
    background: var(--secondary-color);
}

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

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: 50px 50px;
    animation: float 20s linear infinite;
}

@keyframes float {
    0% { transform: translateY(0); }
    100% { transform: translateY(-50px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    color: #fff;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.2);
}

.hero h2 {
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
    opacity: 0.85;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

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

.btn-secondary:hover {
    background: #fff;
    color: var(--primary-color);
    transform: translateY(-3px);
}

.social-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.social-links a {
    color: #fff;
    font-size: 1.8rem;
    transition: var(--transition);
}

.social-links a:hover {
    transform: scale(1.2);
}

.section {
    padding: 5rem 2rem;
    background: var(--bg-light);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
}

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

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--secondary-color);
    margin: 1rem auto 0;
    border-radius: 2px;
}

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

.about-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--secondary-color);
}

.timeline-item {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 2.5rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 0;
    width: 15px;
    height: 15px;
    background: var(--secondary-color);
    border-radius: 50%;
    border: 3px solid var(--bg-light);
}

.timeline-date {
    font-size: 0.9rem;
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.timeline-content {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.timeline-content h3 {
    color: var(--primary-color);
    margin-bottom: 0.3rem;
}

.job-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.3rem;
}

.job-header .tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.job-header .tech-stack span {
    background: linear-gradient(135deg, var(--secondary-color), #667eea);
    color: #fff;
    padding: 0.2rem 0.6rem;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 500;
}

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

.timeline-content ul {
    list-style: none;
}

.timeline-content li {
    position: relative;
    padding-left: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.timeline-content li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.project-link:hover {
    color: var(--accent-color);
}

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

.project-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

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

.project-card p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-stack span {
    background: linear-gradient(135deg, var(--secondary-color), #667eea);
    color: #fff;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.edu-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 4px solid var(--secondary-color);
}

.edu-card:hover {
    transform: translateY(-3px);
}

.edu-card h3 {
    color: var(--primary-color);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.edu-card h4 {
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 0.3rem;
}

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

.skills-container {
    display: grid;
    gap: 2rem;
}

.skill-category {
    background: var(--bg-card);
    padding: 1.5rem 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.skill-category h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.skill-tags span {
    background: var(--bg-light);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    border: 1px solid #e0e0e0;
    transition: var(--transition);
}

.skill-tags span:hover {
    background: var(--secondary-color);
    color: #fff;
    border-color: var(--secondary-color);
}

.contact-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.1rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--secondary-color);
}

.contact-item a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer {
    background: var(--primary-color);
    color: #fff;
    text-align: center;
    padding: 2rem;
}

.footer p {
    opacity: 0.8;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero h2 {
        font-size: 1.3rem;
    }

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

    .nav-menu {
        display: none;
    }

    .timeline::before {
        left: 0;
    }

    .timeline-item {
        padding-left: 1.5rem;
    }

    .timeline-item::before {
        left: -4px;
    }

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