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

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-card: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #666666;
    --accent-primary: #00d4ff;
    --accent-secondary: #0099cc;
    --border-color: #333333;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}


body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

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

header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

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

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

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

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

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

main {
    margin-top: 80px;
}

section {
    padding: 5rem 0;
}

section:nth-child(even) {
    background-color: var(--bg-secondary);
}

h1, h2, h3 {
    margin-bottom: 1rem;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.hero {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    padding: 8rem 0;
    text-align: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

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

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

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

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.about {
    text-align: center;
}

.about p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
}

.education-item,
.experience-item {
    background-color: var(--bg-card);
    padding: 2.5rem;
    margin-bottom: 3rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.experience-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
}

.experience-item .company {
    color: var(--accent-primary);
    font-size: 1.4rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.experience-item .company-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.experience-item .company {
    margin-bottom: 0;
}

.experience-item h3 {
    color: var(--text-primary);
    font-size: 1.4rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.education-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
}

.education-item .institution {
    color: var(--accent-primary);
    font-size: 1.4rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.education-item .institution-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.education-item .institution {
    margin-bottom: 0;
}

.education-item h3 {
    color: var(--text-primary);
    font-size: 1.4rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.date {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 0;
    font-weight: 500;
    padding: 0.5rem 1rem;
    background-color: var(--bg-secondary);
    border-radius: 20px;
    display: inline-block;
    white-space: nowrap;
}

.description {
    color: var(--text-secondary);
}

.responsibilities {
    list-style: none;
    padding-left: 0;
}

.responsibilities li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.responsibilities li::before {
    content: "▸";
    color: var(--accent-primary);
    position: absolute;
    left: 0;
}

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

.project-card {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

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

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech {
    background-color: var(--bg-secondary);
    color: var(--accent-primary);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
}

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

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

.skill-category {
    background-color: var(--bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

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

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.skill-tag {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.skill-tag:hover {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
}

.contact {
    text-align: center;
}

.contact p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

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

.contact-link {
    display: flex;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--bg-card);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    box-shadow: var(--shadow);
}

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

footer {
    background-color: var(--bg-secondary);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

footer p {
    color: var(--text-muted);
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 0.5rem;
        padding: 0.8rem;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .nav-menu {
        gap: 0.5rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-menu a {
        font-size: 0.9rem;
        padding: 0.3rem 0.6rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    section {
        padding: 3rem 0;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0.5rem;
    }
    
    .logo {
        font-size: 1rem;
    }
    
    .nav-menu {
        gap: 0.3rem;
    }
    
    .nav-menu a {
        font-size: 0.8rem;
        padding: 0.2rem 0.4rem;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1.2rem;
    }
    
    .education-item,
    .experience-item,
    .project-card,
    .skill-category {
        padding: 1.5rem;
    }
    
    .date {
        font-size: 0.8rem;
        padding: 0.3rem 0.6rem;
    }
    
    .experience-item .company,
    .education-item .institution {
        font-size: 1.1rem;
    }
    
    .experience-item h3,
    .education-item h3 {
        font-size: 1.1rem;
    }
    
    .description,
    .responsibilities li {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .education-item,
    .experience-item,
    .project-card,
    .skill-category {
        padding: 1.5rem;
    }
}