:root[data-theme="dark"] {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --text-primary: #e8e8e8;
    --text-secondary: #a0a0a0;
    --text-tertiary: #707070;
    --accent-primary: #0088ff;
    --accent-secondary: #0088ff;
    --border-color: #2a2a2a;
    --card-bg: #151515;
    --card-hover: #1f1f1f;
    --shadow: rgba(0, 0, 0, 0.5);
}

:root[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f8f8;
    --bg-tertiary: #f0f0f0;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-tertiary: #8a8a8a;
    --accent-primary: #0088ff;
    --accent-secondary: #0088ff;
    --border-color: #e0e0e0;
    --card-bg: #fafafa;
    --card-hover: #f5f5f5;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'IBM Plex Sans', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}

/* NAVBAR */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.nav-logo:hover {
    transform: scale(1.05);
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link.active {
    color: var(--accent-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-primary);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

.theme-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-toggle:hover {
    background: var(--card-hover);
    transform: scale(1.05);
}

.theme-icon {
    display: inline-block;
    transition: transform 0.3s ease;
}

.theme-toggle:hover .theme-icon {
    transform: rotate(180deg);
}

/* MAIN CONTENT */
.main-content {
    margin-top: 80px;
    min-height: calc(100vh - 180px);
}

.page {
    display: none;
    animation: fadeIn 0.5s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* HERO SECTION */
.hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
    text-align: center;
}

.hero-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.1;
}

.glitch {
    position: relative;
    display: inline-block;
    color: var(--text-primary);
}

.hero-subtitle {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.3rem;
    color: var(--accent-primary);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2rem;
}

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

.hero-link {
    padding: 0.75rem 2rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    text-decoration: none;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.hero-link:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

/* SECTIONS */
.featured-section,
.skills-section {
    max-width: 1400px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.section-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

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

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card:hover {
    background: var(--card-hover);
    transform: translateY(-5px);
    box-shadow: 0 8px 24px var(--shadow);
}

.project-header {
    margin-bottom: 1rem;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

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

.tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    color: var(--accent-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-weight: 500;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.3s ease;
    display: inline-block;
}

.project-link:hover {
    color: var(--accent-secondary);
    transform: translateX(5px);
}

/* SKILLS GRID */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.skill-category:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 4px 16px var(--shadow);
}

.skill-category-title {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-primary);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

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

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

.skill-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

/* PAGE CONTENT */
.page-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.page-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 3rem;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

/* ABOUT PAGE */
.about-content {
    display: grid;
    gap: 3rem;
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
}

.lead-text {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
    font-weight: 500;
}

.subsection-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.8rem;
    margin: 3rem 0 1.5rem;
    color: var(--accent-primary);
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin: 2rem 0;
}

.timeline-item {
    display: flex;
    gap: 1.5rem;
    position: relative;
}

.timeline-marker {
    width: 12px;
    height: 12px;
    background: var(--accent-primary);
    border-radius: 50%;
    margin-top: 0.5rem;
    flex-shrink: 0;
    position: relative;
}

.timeline-marker::after {
    content: '';
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100px;
    background: var(--border-color);
}

.timeline-item:last-child .timeline-marker::after {
    display: none;
}

.timeline-content h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.timeline-content p {
    color: var(--text-secondary);
}

.credentials-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.credentials-list li {
    padding: 1rem;
    background: var(--card-bg);
    border-left: 3px solid var(--accent-primary);
    color: var(--text-secondary);
}

.credentials-list strong {
    color: var(--text-primary);
}

/* BLOG PAGE */
.blog-grid {
    display: grid;
    gap: 2rem;
}

.blog-post {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    transition: all 0.3s ease;
}

.blog-post:hover {
    border-color: var(--accent-primary);
    transform: translateX(10px);
    box-shadow: 0 4px 16px var(--shadow);
}

.post-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

.post-date {
    color: var(--text-tertiary);
}

.post-category {
    color: var(--accent-primary);
}

.post-title {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.post-excerpt {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.post-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.3s ease;
    display: inline-block;
}

.post-link:hover {
    color: var(--accent-secondary);
    transform: translateX(5px);
}

/* NOTES PAGE */
.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.note-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.note-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 6px 20px var(--shadow);
}

.note-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.note-icon {
    font-size: 2rem;
}

.note-title {
    font-size: 1.2rem;
    color: var(--text-primary);
}

.note-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
    font-size: 0.95rem;
}

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

/* FOOTER */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-content p {
    color: var(--text-tertiary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
}

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.9rem;
}

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

/* RESPONSIVE */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
    }
    
    .hero {
        padding: 4rem 1rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .notes-grid {
        grid-template-columns: 1fr;
    }
    
    .page-content {
        padding: 2rem 1rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 1rem;
    }
    
    .nav-menu {
        gap: 0.5rem;
        font-size: 0.85rem;
    }
    
    .theme-toggle {
        padding: 0.4rem 0.8rem;
    }
}