/* ============================================
   CSS Variables & Base Setup
   ============================================ */
:root {
    /* Colors - Light Mode */
    --primary: #D94A1A;
    --primary-dark: #BF3D12;
    --primary-light: #FF8C66;
    --secondary: #004E89;
    --secondary-dark: #003A66;
    --accent: #1A659E;

    /* Grayscale - Light Mode */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Semantic Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --text-primary: #111827;
    --text-secondary: #4B5563;
    --text-tertiary: #6B7280;
    --border-color: #E5E7EB;
    --border-color-dark: #D1D5DB;

    /* Spacing */
    --container-width: 1200px;
    --section-padding: 80px;
    --card-padding: 32px;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

    /* 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), 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);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Dark Mode */
[data-theme="dark"] {
    /* Grayscale - Dark Mode (inverted) */
    --gray-50: #18181B;
    --gray-100: #27272A;
    --gray-200: #3F3F46;
    --gray-300: #52525B;
    --gray-400: #71717A;
    --gray-500: #A1A1AA;
    --gray-600: #D4D4D8;
    --gray-700: #E4E4E7;
    --gray-800: #F4F4F5;
    --gray-900: #FAFAFA;

    /* Semantic Colors - Dark Mode */
    --bg-primary: #0F0F12;
    --bg-secondary: #18181B;
    --bg-tertiary: #27272A;
    --text-primary: #FAFAFA;
    --text-secondary: #D4D4D8;
    --text-tertiary: #A1A1AA;
    --border-color: #3F3F46;
    --border-color-dark: #52525B;

    /* Adjust shadows for dark mode */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
}

/* ============================================
   Reset & Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-base);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   Utility Classes
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

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

/* ============================================
   Header & Navigation
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    max-width: var(--container-width);
    margin: 0 auto;
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
}

.logo-x {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    color: var(--gray-700);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-logo-img {
    height: 32px;
    width: auto;
    display: block;
}

.nav-github-icon {
    height: 20px;
    width: 20px;
    display: inline-block;
}

/* ============================================
   Mobile Menu Button
   ============================================ */
.mobile-menu-button {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.hamburger {
    width: 24px;
    height: 2px;
    background: var(--gray-900);
    position: relative;
    transition: all var(--transition-base);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--gray-900);
    transition: all var(--transition-base);
}

.hamburger::before {
    transform: translateY(-8px);
}

.hamburger::after {
    transform: translateY(8px);
}

/* Hamburger Animation */
.mobile-menu-button.active .hamburger {
    background: transparent;
}

.mobile-menu-button.active .hamburger::before {
    transform: rotate(45deg);
}

.mobile-menu-button.active .hamburger::after {
    transform: rotate(-45deg);
}

[data-theme="dark"] .hamburger,
[data-theme="dark"] .hamburger::before,
[data-theme="dark"] .hamburger::after {
    background: var(--text-primary);
}
/* ============================================
   Buttons
   ============================================ */
.btn-primary,
.btn-secondary,
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-weight: 600;
    border-radius: 8px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: 1rem;
}

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

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

.btn-secondary {
    background: var(--secondary);
    color: white;
}

.btn-secondary:hover {
    background: var(--secondary-dark);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    margin-top: 80px;
    padding: 120px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(5deg); }
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--gray-900);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Architecture Diagram in Hero */
.hero-visual {
    position: relative;
}

.architecture-diagram {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 40px;
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
    animation: slideInRight 0.8s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.arch-node {
    text-align: center;
    padding: 20px;
    border-radius: 12px;
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    transition: all var(--transition-base);
    animation: fadeInUp 0.6s ease-out backwards;
}

.arch-node:nth-child(1) { animation-delay: 0.2s; }
.arch-node:nth-child(3) { animation-delay: 0.4s; }
.arch-node:nth-child(5) { animation-delay: 0.6s; }

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

.arch-node:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.node-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
}

.node-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
}

.connection-line {
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    position: relative;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.connection-line::after {
    content: '→';
    position: absolute;
    right: -10px;
    top: -10px;
    color: var(--primary);
    font-size: 1.2rem;
}

/* ============================================
   Section Styles
   ============================================ */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--gray-900);
}

/* ============================================
   Features Section
   ============================================ */
.features {
    padding: var(--section-padding) 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.feature-card {
    padding: var(--card-padding);
    border-radius: 16px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--gray-900);
}

.feature-card p {
    color: var(--gray-600);
    line-height: 1.8;
}

/* ============================================
   How It Works - Timeline
   ============================================ */
.how-it-works {
    padding: var(--section-padding) 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary) 0%, var(--secondary) 100%);
}

.timeline-item {
    position: relative;
    padding-left: 80px;
    margin-bottom: 60px;
}

.timeline-marker {
    position: absolute;
    left: 0;
    top: 0;
    width: 60px;
    height: 60px;
    background: white;
    border: 4px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    z-index: 1;
}

.timeline-content {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    box-shadow: var(--shadow-xl);
    transform: translateX(10px);
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--gray-900);
}

.timeline-content p {
    color: var(--gray-600);
    margin-bottom: 16px;
    line-height: 1.8;
}

.tech-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary);
    color: white;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-right: 8px;
    margin-top: 8px;
}

/* ============================================
   Architecture Section
   ============================================ */
.architecture {
    padding: var(--section-padding) 0;
    background: white;
}

.arch-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    margin-bottom: 60px;
}

.arch-column {
    flex: 1;
    max-width: 400px;
}

.arch-box {
    padding: 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.arch-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.user-device {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.aws-cloud {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.arch-box h4 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.arch-box ul {
    list-style: disc;
    padding-left: 20px;
}

.arch-box li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.arch-arrow {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.arrow-svg {
    width: 100px;
    height: 50px;
    color: var(--primary);
}

.arrow-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-600);
    background: var(--gray-100);
    padding: 6px 12px;
    border-radius: 6px;
}

.arch-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.benefit {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px;
    background: var(--gray-50);
    border-radius: 12px;
    border: 1px solid var(--gray-200);
}

.benefit-icon {
    font-size: 1.5rem;
    color: var(--primary);
    font-weight: 700;
}

/* ============================================
   Getting Started Section
   ============================================ */
.getting-started {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
    margin-bottom: 60px;
}

.step-card {
    background: white;
    padding: var(--card-padding);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
}

.step-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.step-number {
    position: absolute;
    top: -20px;
    left: 32px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: var(--shadow-lg);
}

.step-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    margin-top: 20px;
    color: var(--gray-900);
}

.code-block {
    background: var(--gray-900);
    color: #00ff00;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.code-block code {
    white-space: pre-wrap;
}

.step-card p {
    color: var(--gray-600);
    line-height: 1.8;
}

.advanced-features {
    max-width: 900px;
    margin: 60px auto 0;
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.advanced-features h3 {
    font-size: 2rem;
    margin-bottom: 32px;
    color: var(--gray-900);
}

.feature-list {
    display: grid;
    gap: 24px;
}

.feature-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--gray-50);
    border-radius: 12px;
    border-left: 4px solid var(--primary);
}

.feature-icon-small {
    font-size: 2rem;
    flex-shrink: 0;
}

.feature-item strong {
    display: block;
    font-size: 1.125rem;
    margin-bottom: 8px;
    color: var(--gray-900);
}

.feature-item p {
    color: var(--gray-600);
    line-height: 1.8;
}

.feature-item code {
    background: var(--gray-200);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--primary);
}

/* ============================================
   Service Catalog Section
   ============================================ */
.service-catalog {
    padding: var(--section-padding) 0;
    background: white;
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
}

.catalog-card {
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--gray-200);
    transition: all var(--transition-base);
}

.catalog-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.catalog-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    display: block;
}

.catalog-card h3 {
    font-size: 1.75rem;
    margin-bottom: 16px;
    color: var(--gray-900);
}

.catalog-card > p {
    color: var(--gray-600);
    margin-bottom: 24px;
    line-height: 1.8;
}

.catalog-features {
    list-style: none;
    padding: 0;
}

.catalog-features li {
    padding: 12px 0;
    padding-left: 32px;
    position: relative;
    color: var(--gray-700);
    line-height: 1.6;
}

.catalog-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
    font-size: 1.25rem;
}

/* ============================================
   CTA Section
   ============================================ */
.cta {
    padding: var(--section-padding) 0;
    background: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
    color: white;
    text-align: center;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.cta p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta .btn-primary {
    background: white;
    color: var(--secondary);
}

.cta .btn-primary:hover {
    background: var(--gray-100);
}

.cta .btn-outline {
    border-color: white;
    color: white;
}

.cta .btn-outline:hover {
    background: white;
    color: var(--secondary);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    color: white;
    display: block;
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--gray-400);
}

.footer-column h4 {
    color: white;
    margin-bottom: 16px;
    font-size: 1.125rem;
}

.footer-column ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--gray-800);
    text-align: center;
    color: var(--gray-500);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .architecture-diagram {
        flex-direction: column;
        gap: 20px;
    }
    
    .connection-line {
        width: 2px;
        height: 40px;
    }
    
    .connection-line::after {
        content: '↓';
        right: -10px;
        top: auto;
        bottom: -10px;
    }
    
    .arch-container {
        flex-direction: column;
    }
    
    .arch-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }

    .mobile-menu-button {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 20px;
        gap: 20px;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-150%);
        transition: transform var(--transition-base);
        box-shadow: var(--shadow-lg);
    }

    [data-theme="dark"] .nav-menu {
        background: rgba(15, 15, 18, 0.98);
    }

    .nav-menu.active {
        transform: translateY(0);
    }
    
    .nav-menu a {
        font-size: 1.125rem;
        width: 100%;
        text-align: center;
        padding: 10px;
    }
    
    .hero {
        padding: 80px 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid,
    .steps-grid,
    .catalog-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 15px;
    }
    
    .timeline-item {
        padding-left: 60px;
    }
    
    .timeline-marker {
        width: 40px;
        height: 40px;
        font-size: 1.125rem;
    }
}

@media (max-width: 480px) {
    .hero-buttons,
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-primary,
    .btn-secondary,
    .btn-outline {
        width: 100%;
        justify-content: center;
    }
    
    .code-block {
        font-size: 0.75rem;
    }
}

/* ============================================
   Animations & Effects
   ============================================ */
@keyframes gradient-shift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.gradient-text {
    background-size: 200% auto;
    animation: gradient-shift 3s ease infinite;
}

/* Scroll reveal animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Loading animation for code blocks */
@keyframes cursor-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.code-block::after {
    content: '▊';
    animation: cursor-blink 1s infinite;
}

/* ============================================
   AWS Deployment Section
   ============================================ */
.aws-deployment {
    padding: var(--section-padding) 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, white 50%, var(--gray-50) 100%);
}

.section-subtitle {
    text-align: center;
    font-size: 1.25rem;
    color: var(--gray-600);
    max-width: 800px;
    margin: -40px auto 60px;
    line-height: 1.8;
}

.deployment-flow {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.deployment-step {
    margin-bottom: 60px;
    position: relative;
}

.step-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.step-badge {
    background: var(--primary);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.875rem;
}

.optional-badge {
    background: var(--gray-400);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.75rem;
}

.step-header h3 {
    font-size: 1.75rem;
    color: var(--gray-900);
    margin: 0;
}

.deployment-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--gray-200);
    transition: all var(--transition-base);
    position: relative;
}

.deployment-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.deployment-card.optional {
    border-style: dashed;
    border-color: var(--gray-300);
    background: linear-gradient(135deg, var(--gray-50) 0%, white 100%);
}

.deployment-card.optional:hover {
    border-color: var(--gray-400);
}

.deployment-icon {
    font-size: 3.5rem;
    margin-bottom: 16px;
    display: block;
}

.deployment-card h4 {
    font-size: 2rem;
    color: var(--gray-900);
    margin-bottom: 12px;
    font-weight: 700;
}

.deployment-desc {
    color: var(--gray-600);
    font-size: 1.125rem;
    margin-bottom: 24px;
    line-height: 1.6;
}

.what-it-creates {
    background: var(--gray-50);
    padding: 24px;
    border-radius: 12px;
    margin-bottom: 24px;
    border-left: 4px solid var(--primary);
}

.what-it-creates strong {
    display: block;
    font-size: 1.125rem;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.what-it-creates ul {
    list-style: none;
    padding: 0;
}

.what-it-creates li {
    padding: 8px 0;
    padding-left: 28px;
    position: relative;
    color: var(--gray-700);
    line-height: 1.6;
}

.what-it-creates li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.deployment-params {
    margin-bottom: 24px;
}

.deployment-params strong {
    display: block;
    font-size: 1.125rem;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.param-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}

.param {
    background: var(--gray-50);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid var(--gray-200);
}

.param code {
    display: block;
    font-family: var(--font-mono);
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 4px;
    font-size: 0.875rem;
}

.param span {
    color: var(--gray-600);
    font-size: 0.875rem;
}

.software-selection {
    margin-bottom: 24px;
}

.software-selection strong {
    display: block;
    font-size: 1.125rem;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.software-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.badge {
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.badge.recommended {
    background: var(--primary);
    color: white;
}

.badge.optional {
    background: var(--gray-200);
    color: var(--gray-700);
}

.deployment-note {
    background: #E8F4F8;
    border-left: 4px solid #0288D1;
    padding: 16px;
    border-radius: 8px;
    display: flex;
    gap: 12px;
    align-items: start;
    margin-bottom: 24px;
}

.note-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.deployment-note p {
    margin: 0;
    color: var(--gray-700);
    line-height: 1.6;
}

.btn-deploy {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    background: var(--primary);
    color: white;
    border-radius: 8px;
    font-weight: 600;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
}

.btn-deploy:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-deploy img {
    height: 24px;
    width: auto;
}

.deployment-arrow-down {
    text-align: center;
    font-size: 3rem;
    color: var(--primary);
    margin: 20px 0;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.multi-environment-info {
    max-width: 900px;
    margin: 60px auto 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 48px;
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
}

.multi-environment-info h3 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.multi-environment-info > p {
    font-size: 1.125rem;
    margin-bottom: 32px;
    line-height: 1.8;
    opacity: 0.95;
}

.environment-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.env-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.1);
    padding: 16px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

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

.environment-use-cases {
    font-size: 1rem;
    line-height: 1.8;
    opacity: 0.9;
    margin: 0;
    font-style: italic;
}

/* Responsive adjustments for AWS deployment */
@media (max-width: 768px) {
    .deployment-flow {
        padding: 0 10px;
    }

    .deployment-card {
        padding: 24px;
    }

    .step-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .param-grid {
        grid-template-columns: 1fr;
    }

    .software-badges {
        justify-content: center;
    }

    .multi-environment-info {
        padding: 32px 24px;
    }

    .environment-features {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Navigation Controls (Dark Mode & Lang Switcher)
   ============================================ */
.nav-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

.icon-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.25rem;
    padding: 8px;
    border-radius: 8px;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: var(--gray-100);
    transform: scale(1.1);
}

.icon-btn .icon-light {
    display: block;
}

.icon-btn .icon-dark {
    display: none;
}

[data-theme="dark"] .icon-btn .icon-light {
    display: none;
}

[data-theme="dark"] .icon-btn .icon-dark {
    display: block;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.875rem;
}

.lang-link {
    color: var(--gray-600);
    transition: color var(--transition-fast);
    text-decoration: none;
}

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

.lang-link.active {
    color: var(--primary);
    font-weight: 700;
}

.lang-sep {
    color: var(--gray-400);
}

/* ============================================
   Dark Mode Specific Adjustments
   ============================================ */
[data-theme="dark"] .header {
    background: rgba(15, 15, 18, 0.95);
}

[data-theme="dark"] .hero {
    background: linear-gradient(135deg, #18181B 0%, #27272A 100%);
}

[data-theme="dark"] .features {
    background: var(--bg-primary);
}

[data-theme="dark"] .architecture {
    background: var(--bg-primary);
}

[data-theme="dark"] .getting-started {
    background: var(--bg-secondary);
}

[data-theme="dark"] .aws-deployment {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 50%, var(--bg-secondary) 100%);
}

[data-theme="dark"] .feature-card,
[data-theme="dark"] .step-card,
[data-theme="dark"] .deployment-card {
    background: var(--bg-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .deployment-card.optional {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

[data-theme="dark"] .arch-box {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .timeline-content,
[data-theme="dark"] .advanced-features {
    background: var(--bg-primary);
}

[data-theme="dark"] .architecture-diagram {
    background: var(--bg-primary);
}

[data-theme="dark"] .code-block {
    background: #000000;
    border: 1px solid var(--border-color);
}

/* Responsive for navigation controls */
@media (max-width: 768px) {
    .nav-controls {
        gap: 12px;
    }

    .lang-switcher {
        font-size: 0.75rem;
    }

    .icon-btn {
        font-size: 1rem;
        padding: 6px;
    }
}