@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* Midnight Pro Palette */
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #242424;

    --text-primary: #ffffff;
    --text-secondary: #a3a3a3;
    --text-muted: #737373;

    --accent-primary: #10b981;
    --accent-secondary: #fbbf24;
    --accent-hover: #059669;

    --border-color: #2a2a2a;

    /* Light mode (optional) */
    --light-bg: #ffffff;
    --light-text: #0f0f0f;
    --light-border: #e5e5e5;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Typography */
    --font-primary: 'Space Grotesk', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e5e5e5;
    --text-primary: #0f0f0f;
    --text-secondary: #525252;
    --text-muted: #737373;
    --border-color: #e5e5e5;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

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

/* Sidebar Navigation */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    width: 80px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg) 0;
    z-index: 100;
    transition: all var(--transition-normal);
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

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

.logo-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-secondary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(0.8); }
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    flex-grow: 1;
}

.nav-link {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    padding: var(--space-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: -1px;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 0;
    background: var(--accent-primary);
    transition: height var(--transition-normal);
}

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

.nav-link.active::before {
    height: 100%;
}

.sidebar-footer {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    background: transparent;
    border-radius: 8px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.icon-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.lang-text {
    font-size: 0.65rem;
    font-weight: 600;
    position: absolute;
    bottom: 4px;
    right: 4px;
}

/* Language Dropdown */
.lang-dropdown {
    position: fixed;
    left: 90px;
    bottom: 80px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--space-xs);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-10px);
    transition: all var(--transition-normal);
    z-index: 101;
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.lang-option {
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
}

.lang-option:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.lang-option.active {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    padding: 10px;
    cursor: pointer;
    z-index: 101;
}

.mobile-toggle span {
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.mobile-toggle.active span:first-child {
    transform: rotate(45deg) translateY(8px);
}

.mobile-toggle.active span:last-child {
    transform: rotate(-45deg) translateY(-8px);
}

/* Main Content */
.main-content {
    margin-left: 80px;
    min-height: 100vh;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-3xl) var(--space-2xl);
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    width: fit-content;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1;
    margin-bottom: var(--space-md);
}

.title-line {
    display: block;
}

.title-line.accent {
    color: var(--accent-primary);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.hero-description {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.6;
    margin-bottom: var(--space-xl);
}

/* CTA Buttons */
.hero-cta {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: 8px;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

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

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

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    border-color: var(--accent-primary);
    background: rgba(16, 185, 129, 0.1);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    gap: var(--space-xl);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-secondary);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: var(--space-2xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.scroll-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 60px;
    height: 1px;
    background: var(--text-muted);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 30px;
    height: 100%;
    background: var(--accent-primary);
    animation: scroll-indicator 2s ease-in-out infinite;
}

@keyframes scroll-indicator {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(200%); }
}

/* Sections */
section {
    padding: var(--space-xl) var(--space-2xl);
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.section-number {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    color: var(--accent-primary);
    font-weight: 700;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

.about-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--space-xl);
    transition: all var(--transition-normal);
}

.about-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.card-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-secondary);
    margin-bottom: var(--space-md);
}

.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-lg);
}

/* Timeline */
.timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.timeline-item {
    display: flex;
    gap: var(--space-md);
    position: relative;
}

.timeline-dot {
    width: 12px;
    height: 12px;
    background: var(--accent-primary);
    border-radius: 50%;
    margin-top: 6px;
    flex-shrink: 0;
}

.timeline-item:not(:last-child) .timeline-dot::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 18px;
    width: 1px;
    height: calc(100% + var(--space-xl));
    background: var(--border-color);
}

.timeline-content {
    flex: 1;
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--space-xs);
    gap: var(--space-sm);
}

.year {
    padding: 0.25rem var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    white-space: nowrap;
}

.company {
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

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

/* Skills List */
.skills-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.skill-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.skill-item:hover {
    background: var(--bg-primary);
    transform: translateX(4px);
}

.skill-icon {
    font-size: 1.5rem;
}

/* Education List */
.education-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.education-item {
    display: flex;
    gap: var(--space-md);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}

.education-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.education-year {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-secondary);
    font-weight: 600;
    flex-shrink: 0;
}

.education-content strong {
    display: block;
    margin-bottom: 0.25rem;
}

.education-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Skills Section */
.skills-categories {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.skill-category {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.category-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--space-xs);
    padding-left: var(--space-sm);
    border-left: 3px solid var(--accent-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

.skill-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--space-md) var(--space-lg);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.skill-card:hover {
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
    transform: translateX(4px);
}

.skill-card .skill-icon {
    font-size: 1.75rem;
    flex-shrink: 0;
}

.skill-card .skill-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

@media (min-width: 1400px) {
    .projects-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.project-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--space-2xl);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.project-card:hover {
    border-color: var(--accent-primary);
}

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

.project-number {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent-secondary);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.05em;
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.tag {
    padding: 0.25rem var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.project-link,
.project-links a {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.project-link:hover,
.project-links a:hover {
    gap: var(--space-sm);
}

.project-links {
    display: flex;
    gap: var(--space-lg);
}

/* Contact Section */
.contact-intro {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 600px;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.contact-method:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
}

.method-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: 8px;
    font-size: 1.25rem;
    color: var(--accent-primary);
    flex-shrink: 0;
}

.method-content {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex: 1;
}

.method-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.method-value {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
    word-break: break-word;
    overflow-wrap: break-word;
}

/* Footer */
.footer {
    padding: var(--space-xl);
    border-top: 1px solid var(--border-color);
    margin-top: var(--space-xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: var(--space-lg);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 200px;
        padding: var(--space-xl);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .logo {
        flex-direction: row;
        margin-bottom: var(--space-xl);
    }

    .nav-links {
        width: 100%;
    }

    .nav-link {
        writing-mode: horizontal-tb;
        width: 100%;
    }

    .nav-link::before {
        left: 0;
        top: auto;
        bottom: -1px;
        width: 0;
        height: 2px;
    }

    .nav-link.active::before {
        width: 100%;
        height: 2px;
    }

    .sidebar-footer {
        flex-direction: row;
        width: 100%;
    }

    .mobile-toggle {
        display: flex;
    }

    .main-content {
        margin-left: 0;
    }

    .hero,
    section {
        padding: var(--space-lg) var(--space-md);
    }

    .section-header {
        flex-direction: column;
        align-items: start;
        gap: var(--space-sm);
    }

    .hero-stats {
        gap: var(--space-xl);
    }

    .stat-number {
        font-size: 2rem;
    }

    .scroll-indicator {
        display: none;
    }

    .about-grid,
    .projects-grid,
    .contact-methods,
    .skills-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: clamp(2.5rem, 12vw, 4rem);
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: var(--space-lg);
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease-out;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
}