/* CSS Custom Properties (Design System) */
:root {
    /* Color Palette - Atom One Dark inspired */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-card: #1e1e3f;
    
    --text-primary: #e5e5e5;
    --text-secondary: #a0a0a0;
    --text-muted: #6b7280;
    
    --accent-primary: #e5e7eb;
    --accent-secondary: #151515;
    --accent-tertiary: #696969;
    --accent-success: #4d4d4d;
    
    --border-primary: #2d3748;
    --border-secondary: #374151;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(135, 135, 135, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.35s ease;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

/* Code-style title */
.code-title {
    font-family: 'Cascadia Code', 'JetBrains Mono', 'Fira Code', 'Monaco', 'Consolas', monospace !important;
    color: #ffffff !important;
    background: none !important;
    -webkit-background-clip: unset !important;
    -webkit-text-fill-color: unset !important;
    background-clip: unset !important;
    font-weight: 500;
    letter-spacing: -0.02em;
}

.highlight {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.highlight-solid {
    color: var(--persona-primary, var(--accent-primary));
}

/* Navigation */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 35, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-primary);
    transition: all var(--transition-normal);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.1);
}

/* Enhanced scrolled state */
.main-nav.scrolled {
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.15);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--accent-primary);
    transition: var(--transition-fast);
}

.nav-brand i {
    font-size: 1.5rem;
}

.nav-brand:hover {
    color: var(--accent-secondary);
}

.footer-nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 1.25rem;
    color: white;
    transition: var(--transition-fast);
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    position: relative;
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--space-sm) 0;
    transition: var(--transition-fast);
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-primary);
    border-radius: 1px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.persona-toggle {
    color: var(--text-secondary);
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.persona-toggle:hover {
    color: var(--accent-primary);
    background: var(--bg-card);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: var(--space-sm);
}

.mobile-menu-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 1px;
    transition: var(--transition-fast);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-container {
        padding: 0 var(--space-md);
    }
}

.mobile-menu {
    position: fixed;
    top: 4rem;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    transform: translateY(-100%);
    transition: transform var(--transition-normal);
    z-index: 999;
}

.mobile-menu.active {
    transform: translateY(0);
}

.mobile-menu-content {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.mobile-nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--border-primary);
    transition: var(--transition-fast);
}

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

/* Hero Section */
.hero {
    padding: 8rem 0 2rem;
    position: relative;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.greeting {
    margin-bottom: var(--space-lg);
}

.greeting-text {
    display: inline-block;
    color: var(--accent-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    padding: var(--space-xs) var(--space-md);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-md);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 5px rgba(16, 185, 129, 0.2); }
    to { box-shadow: 0 0 10px rgba(16, 185, 129, 0.4); }
}

.hero-title {
    font-family: var(--font-mono);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--space-lg);
    line-height: 1.1;
}

.hero-subtitle {
    display: block;
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    font-weight: 400;
    color: var(--text-secondary);
    margin-top: var(--space-md);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: var(--transition-normal);
    border: 1px solid transparent;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border-secondary);
}

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

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

.stat {
    text-align: center;
}

.stat-number {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--accent-primary);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

/* Terminal */
.hero-visual {
    position: relative;
}

.terminal {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.terminal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-primary);
}

.terminal-controls {
    display: flex;
    gap: var(--space-sm);
}

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

.control.close { background: #ff5555; }
.control.minimize { background: #ffb86c; }
.control.maximize { background: #50fa7b; }

.terminal-title {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.terminal-body {
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
}

.terminal-line {
    margin-bottom: var(--space-md);
}

.prompt {
    color: var(--accent-success);
    margin-right: var(--space-sm);
}

.command {
    color: var(--text-primary);
}

.terminal-output {
    color: var(--text-secondary);
    margin-left: calc(var(--space-sm) + 1ch);
}

/* Quick Navigation */
.quick-nav {
    padding: var(--space-3xl) 0;
}

.quick-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.quick-nav-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.quick-nav-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.card-icon {
    color: var(--accent-primary);
    margin-bottom: var(--space-lg);
}

.quick-nav-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.quick-nav-card p {
    color: var(--text-secondary);
    margin-bottom: var(--space-lg);
}

.card-arrow {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    opacity: 0;
    transform: translateX(-10px);
    transition: var(--transition-normal);
    color: var(--accent-primary);
}

.quick-nav-card:hover .card-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    padding: var(--space-2xl) 0 var(--space-lg);
    margin-top: var(--space-3xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.footer-brand {
    max-width: 300px;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-brand > i {
    color: var(--accent-primary);
    font-size: 1.5rem;
}

.footer-brand .brand-text {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 1.25rem;
    color: var(--text-primary);
    display: block;
}

.footer-brand-text {
    font-family: var(--font-mono);
    color: white;
    font-weight: 600;
    font-size: 1.25rem;
    display: block;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

.social-link {
    color: var(--text-secondary);
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.social-link:hover {
    color: var(--accent-primary);
    background: var(--bg-card);
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-primary);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        text-align: center;
    }
    
    .hero-visual {
        order: -1;
        max-width: 500px;
        margin: 0 auto;
    }
    
    /* Keep terminal content left-aligned even when hero is centered */
    .terminal-body {
        text-align: left;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 5rem 0 var(--space-2xl);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
        max-width: 300px;
    }
    
    .stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--space-lg);
    }
    
    .quick-nav-grid {
        grid-template-columns: 1fr;
    }
    
    /* Ensure terminal content stays left-aligned on small screens */
    .terminal-body {
        text-align: left;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-lg);
        text-align: center;
    }
}

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

/* Dark mode enhancement */
@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --bg-primary: #000000;
        --text-primary: #ffffff;
        --accent-primary: #00ffff;
        --border-primary: #ffffff;
    }
}

.terminal-output a.output-item-underlined {
    text-decoration: underline;
}