:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #10b981;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --border: #e5e7eb;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

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

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-primary);
}

.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);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: all 0.3s ease;
}

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

.nav-brand {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.nav-linkedin {
    display: flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    background: var(--primary);
    color: white !important;
}

.nav-linkedin:hover {
    background: var(--primary-dark);
    color: white !important;
}

.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.nav-mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    padding: 120px 20px 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-title .line {
    display: block;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.hero-badges img {
    height: 40px;
    transition: transform 0.3s ease;
}

.hero-badges a:hover img {
    transform: translateY(-2px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 2rem;
}

.stat {
    text-align: center;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    min-height: 85px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: block;
    min-width: 100px;
    height: 30px;
    line-height: 30px;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

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

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

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

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

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

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

/* Code Window */
.code-window {
    background: #1e1e1e;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.code-header {
    background: #2d2d2d;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.code-title {
    margin-left: auto;
    color: #999;
    font-size: 0.875rem;
    font-family: var(--font-mono);
}

.code-content {
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
    color: #d4d4d4;
    overflow-x: auto;
}

.code-content .keyword {
    color: #c586c0;
}

.code-content .function {
    color: #dcdcaa;
}

.code-content .comment {
    color: #6a9955;
}

/* Sections */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
}

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

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.highlight-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}

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

.highlight-card ul {
    list-style: none;
}

.highlight-card li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -44px;
    top: 8px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    border: 2px solid white;
    box-shadow: 0 0 0 4px var(--bg-secondary);
}

.timeline-date {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.timeline-content {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.timeline-content h3 {
    margin-bottom: 0.5rem;
}

.timeline-content .company {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.timeline-content ul {
    margin-bottom: 1rem;
    padding-left: 20px;
}

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

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

.tech-tags span {
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: 4px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    background: white;
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.project-header h3 {
    font-size: 1.25rem;
}

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

.project-links a {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
}

.project-links a:hover {
    text-decoration: underline;
}

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

.project-stats {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.project-stats span {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    background: var(--bg-secondary);
    border-radius: 4px;
}

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

.project-tech span {
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: 4px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

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

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-items span {
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border-radius: 6px;
    font-size: 0.875rem;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.skill-items span:hover {
    border-color: var(--primary);
    color: var(--primary);
}

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

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

.contact-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

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

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: white;
    border-radius: 8px;
    border: 1px solid var(--border);
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.contact-link:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.contact-link .icon {
    width: 20px;
    height: 20px;
}

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

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .nav-mobile-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .code-window {
        display: none;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
}