/* =============================================================================
   6mvlab - Modern Dark Theme CSS
   ============================================================================= */

/* Reset & Base */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* CSS Custom Properties - Dark Theme */
:root {
    /* Color Palette */
    --color-primary: #00d2ff;
    --color-primary-dark: #0099cc;
    --color-primary-light: #33ddff;
    --color-secondary: #8a2be2;
    --color-accent: #ff6b6b;
    
    /* Dark Theme Colors */
    --color-bg-primary: hsl(220, 20%, 8%);
    --color-bg-secondary: hsl(220, 20%, 12%);
    --color-bg-tertiary: hsl(220, 20%, 16%);
    --color-bg-card: hsl(220, 20%, 10%);
    --color-bg-code: hsl(220, 20%, 6%);
    
    /* Text Colors */
    --color-text-primary: hsl(220, 20%, 95%);
    --color-text-secondary: hsl(220, 20%, 75%);
    --color-text-muted: hsl(220, 20%, 55%);
    --color-text-inverse: hsl(220, 20%, 15%);
    
    /* Border & Divider */
    --color-border: hsl(220, 20%, 25%);
    --color-border-light: hsl(220, 20%, 30%);
    --color-divider: hsl(220, 20%, 20%);
    
    /* State Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* Shadows & Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-bg: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-navbar: 1010;
    --z-modal: 1020;
    --z-tooltip: 1030;
}

/* Light theme (system preference override) */
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
        --color-bg-primary: hsl(220, 20%, 98%);
        --color-bg-secondary: hsl(220, 20%, 95%);
        --color-bg-tertiary: hsl(220, 20%, 92%);
        --color-bg-card: hsl(220, 20%, 100%);
        --color-bg-code: hsl(220, 20%, 96%);
        
        --color-text-primary: hsl(220, 20%, 15%);
        --color-text-secondary: hsl(220, 20%, 35%);
        --color-text-muted: hsl(220, 20%, 55%);
        --color-text-inverse: hsl(220, 20%, 95%);
        
        --color-border: hsl(220, 20%, 85%);
        --color-border-light: hsl(220, 20%, 80%);
        --color-divider: hsl(220, 20%, 90%);
        
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    }
}

/* Force dark theme */
[data-theme="dark"] {
    color-scheme: dark;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--gradient-bg);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-6);
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

@media (min-width: 768px) {
    h1 { font-size: var(--font-size-5xl); }
    h2 { font-size: var(--font-size-4xl); }
    h3 { font-size: var(--font-size-3xl); }
}

p {
    margin-bottom: var(--spacing-4);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--color-primary-light);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: 500;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
    gap: var(--spacing-2);
    min-height: 44px; /* Accessibility: minimum touch target */
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

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

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

.btn-full {
    width: 100%;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(22, 27, 34, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: var(--z-navbar);
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(22, 27, 34, 0.98);
    box-shadow: var(--shadow-lg);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.navbar-brand {
    display: flex;
    align-items: center;
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
}

.logo-icon {
    font-size: 1.5em;
    filter: drop-shadow(0 0 8px rgba(0, 210, 255, 0.3));
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.navbar-nav {
    display: none;
    gap: var(--spacing-8);
}

@media (min-width: 768px) {
    .navbar-nav {
        display: flex;
    }
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: var(--transition-fast);
    padding: var(--spacing-2) 0;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Language Toggle */
.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-2) var(--spacing-3);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: var(--font-size-sm);
    font-weight: 500;
    min-height: 36px;
}

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

.lang-current {
    font-weight: 600;
    color: var(--color-text-primary);
}

.lang-toggle svg {
    transition: var(--transition-fast);
}

.lang-toggle:hover svg {
    transform: rotate(180deg);
}

/* Mobile Menu Toggle */
.navbar-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 24px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
}

@media (min-width: 768px) {
    .navbar-toggle {
        display: none;
    }
}

.navbar-toggle span {
    position: absolute;
    width: 18px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 1px;
    transition: var(--transition-base);
    transform-origin: center;
}

.navbar-toggle span:nth-child(1) {
    top: 6px;
}

.navbar-toggle span:nth-child(2) {
    top: 11px;
}

.navbar-toggle span:nth-child(3) {
    top: 16px;
}

.navbar-toggle.active span:nth-child(1) {
    top: 11px;
    transform: rotate(45deg);
}

.navbar-toggle.active span:nth-child(2) {
    opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
    top: 11px;
    transform: rotate(-45deg);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 72px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 210, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(138, 43, 226, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-12);
    align-items: center;
    position: relative;
    z-index: 1;
}

@media (min-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-16);
    }
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: var(--font-size-6xl);
    }
}

.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

@media (min-width: 768px) {
    .hero-subtitle {
        font-size: var(--font-size-xl);
    }
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

@media (min-width: 480px) {
    .hero-actions {
        flex-direction: row;
        gap: var(--spacing-6);
    }
}

/* Code Window Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.code-window {
    background: var(--color-bg-code);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    max-width: 400px;
    width: 100%;
    border: 1px solid var(--color-border);
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-6);
    background: var(--color-bg-tertiary);
    border-bottom: 1px solid var(--color-border);
}

.code-dots {
    display: flex;
    gap: var(--spacing-2);
}

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

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca3f; }

.code-title {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.code-content {
    padding: var(--spacing-6);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.8;
}

.code-line {
    margin-bottom: var(--spacing-2);
}

.keyword { color: #ff79c6; }
.variable { color: #8be9fd; }
.function { color: #50fa7b; }
.string { color: #f1fa8c; }

/* Hero Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: var(--spacing-8);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: var(--transition-base);
}

.scroll-indicator:hover {
    color: var(--color-primary);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Section Styles */
section {
    padding: var(--spacing-20) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (min-width: 768px) {
    .section-title {
        font-size: var(--font-size-4xl);
    }
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Services Section */
.services {
    background: var(--color-bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
}

@media (min-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-10);
    }
}

.service-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    border: 1px solid var(--color-border);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

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

.service-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-6);
    color: white;
}

.service-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--color-text-primary);
}

.service-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-6);
    line-height: 1.6;
}

.service-features {
    list-style: none;
}

.service-features li {
    color: var(--color-text-muted);
    padding: var(--spacing-2) 0;
    position: relative;
    padding-left: var(--spacing-6);
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* Technologies Section */
.tech-categories {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
}

@media (min-width: 768px) {
    .tech-categories {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .tech-categories {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-12);
    }
}

.tech-category {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    border: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.tech-category:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.tech-category-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-6);
    color: var(--color-text-primary);
    text-align: center;
}

.tech-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
}

.tech-item {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: var(--transition-fast);
    border: 1px solid var(--color-border);
}

.tech-item:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-12);
    max-width: 1000px;
    margin: 0 auto;
}

@media (min-width: 1024px) {
    .contact-content {
        grid-template-columns: 1fr 2fr;
        gap: var(--spacing-16);
    }
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-8);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    color: var(--color-text-primary);
}

.contact-details p {
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* Forms */
.contact-form {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    border: 1px solid var(--color-border);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
}

@media (min-width: 768px) {
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
}

.form-group {
    margin-bottom: var(--spacing-6);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-2);
    color: var(--color-text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 210, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: var(--color-bg-primary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-1);
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-12);
    padding-bottom: var(--spacing-12);
}

@media (min-width: 768px) {
    .footer-main {
        grid-template-columns: 1fr 2fr;
        gap: var(--spacing-16);
    }
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
}

.footer-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-8);
}

.footer-section h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    color: var(--color-text-primary);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--spacing-2);
}

.footer-section a {
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-6);
    padding-top: var(--spacing-4);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-align: center;
    padding-bottom: var(--spacing-6);
    width: 100%;
}

.footer-info p {
    margin-bottom: 0;
    line-height: 1.5;
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: center;
        text-align: center;
    }
    
    .footer-info {
        text-align: center;
    }
}

.footer-bottom p {
    color: var(--color-text-muted);
    margin-bottom: 0;
}

.footer-social {
    display: flex;
    gap: var(--spacing-4);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: var(--transition-base);
}

.footer-social a:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

/* Responsive Mobile Menu */
@media (max-width: 767px) {
    .navbar-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-bg-card);
        border-bottom: 1px solid var(--color-border);
        transform: translateX(-100%);
        transition: var(--transition-base);
        z-index: var(--z-dropdown);
        text-align: center;
    }
    
    .navbar-menu.active {
        transform: translateX(0);
    }
    
    .navbar-nav {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        padding: var(--spacing-6) var(--spacing-4);
        gap: var(--spacing-4);
        width: 70%;
        margin: 0 auto;
    }
    
    .navbar-actions {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 30%;
        margin: var(--spacing-4) auto 0;
        padding: 0;
    }
    
    .navbar-menu .nav-link {
        padding: var(--spacing-3) 0;
        border-bottom: 1px solid var(--color-border);
        text-align: center !important;
        width: 100%;
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
        margin: 0 auto !important;
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
}

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Intersection Observer Animations */
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .hero-scroll {
        animation: none;
    }
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

button:focus,
input:focus,
select:focus,
textarea:focus,
a:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-border: hsl(220, 20%, 60%);
        --color-text-secondary: hsl(220, 20%, 90%);
    }
}

/* Print styles */
@media print {
    .navbar,
    .hero-scroll,
    .footer-social {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero {
        min-height: auto;
        padding: 2rem 0;
    }
}