/* ===================================
   Delta Robot Website Stylesheet
   =================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary-dark: #0f172a;
    --primary-blue: #0ea5e9;
    --accent-cyan: #06b6d4;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --success-green: #10b981;
    --warning-amber: #f59e0b;
    --error-red: #ef4444;
    
    /* Background Colors */
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    
    /* Border Colors */
    --border-light: rgba(255, 255, 255, 0.1);
    --border-medium: rgba(255, 255, 255, 0.2);
    
    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 80px;
    --section-padding-mobile: 40px;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 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-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* ===================================
   Reset & Base Styles
   =================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-darker);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    padding-top: 130px;  /* 60px banner + 70px navbar */
}

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

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ===================================
   Container & Layout
   =================================== */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding) 0;
    background-color: var(--bg-dark);
}

.section-dark {
    background-color: var(--bg-darker);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   Navigation
   =================================== */

/* ===================================
   Announcement Banner
   =================================== */

.announcement-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1001;  /* Above navbar (z-index: 1000) */
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: #fff;
    padding: 18px 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.announcement-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    text-align: center;
}

.announcement-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.announcement-text {
    font-size: 0.95rem;
    line-height: 1.5;
}

.announcement-text strong {
    font-weight: 600;
}

.announcement-text a {
    color: #fff;
    text-decoration: underline;
    font-weight: 500;
    transition: opacity 0.2s ease;
}

.announcement-text a:hover {
    opacity: 0.8;
}

.navbar {
    position: fixed;
    top: 60px;  /* Height of announcement banner */
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    padding: 16px 0;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.nav-brand:hover {
    opacity: 0.8;
}

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

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

.nav-link {
    font-weight: 500;
    transition: color var(--transition-fast);
}

.mobile-menu-toggle {
    display: none;
    color: var(--text-primary);
}

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: #0284c7;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

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

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

.btn-lg {
    padding: 16px 32px;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(14, 165, 233, 0.1) 0%, transparent 50%);
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    margin-bottom: 24px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.badge-icon {
    color: var(--accent-cyan);
    width: 16px;
    height: 16px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 48px;
    line-height: 1.8;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 16px;
    text-align: left;
    padding: 20px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    transition: all var(--transition-normal);
}

.hero-feature:hover {
    border-color: var(--primary-blue);
    transform: translateY(-4px);
}

.feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-blue);
    border-radius: 8px;
    color: white;
}

.feature-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

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

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.hero-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===================================
   Comparison Section
   =================================== */

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.comparison-card {
    background-color: var(--bg-card);
    border: 2px solid var(--border-light);
    border-radius: 16px;
    padding: 32px;
    transition: all var(--transition-normal);
}

.comparison-problem {
    border-color: rgba(239, 68, 68, 0.3);
}

.comparison-solution {
    border-color: var(--success-green);
}

.comparison-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.comparison-icon {
    width: 32px;
    height: 32px;
}

.comparison-problem .comparison-icon {
    color: var(--error-red);
}

.comparison-solution .comparison-icon {
    color: var(--success-green);
}

.comparison-header h3 {
    font-size: 1.5rem;
    flex: 1;
}

.comparison-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.comparison-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 1rem;
    line-height: 1.6;
}

.comparison-list i {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    margin-top: 2px;
}

.comparison-problem .comparison-list i {
    color: var(--error-red);
}

.comparison-solution .comparison-list i {
    color: var(--success-green);
}

/* ===================================
   Architecture Section
   =================================== */

.architecture-content {
    max-width: 1000px;
    margin: 0 auto;
}

.architecture-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    margin-bottom: 60px;
}

.arch-component {
    background-color: var(--bg-card);
    border: 2px solid var(--border-light);
    border-radius: 16px;
    padding: 24px;
    width: 100%;
    max-width: 500px;
}

.arch-pc {
    border-color: var(--primary-blue);
}

.arch-esp32 {
    border-color: var(--accent-cyan);
}

.arch-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
}

.arch-header i {
    width: 32px;
    height: 32px;
}

.arch-pc .arch-header i {
    color: var(--primary-blue);
}

.arch-esp32 .arch-header i {
    color: var(--accent-cyan);
}

.arch-header h3 {
    font-size: 1.5rem;
}

.arch-body {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.arch-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background-color: var(--bg-dark);
    border-radius: 8px;
}

.arch-item i {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
}

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

.connection-line {
    width: 2px;
    height: 40px;
    background: linear-gradient(180deg, var(--primary-blue) 0%, var(--accent-cyan) 100%);
}

.connection-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 12px 20px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    font-size: 0.875rem;
}

.connection-protocol {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.architecture-benefits h3 {
    text-align: center;
    font-size: 1.75rem;
    margin-bottom: 32px;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.benefit-card {
    text-align: center;
    padding: 24px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    transition: all var(--transition-normal);
}

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

.benefit-card i {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    color: var(--primary-blue);
}

.benefit-card h4 {
    font-size: 1.125rem;
    margin-bottom: 8px;
}

.benefit-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===================================
   CTA Banner
   =================================== */

.cta-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    padding: 32px;
    background-color: var(--bg-card);
    border: 2px solid var(--primary-blue);
    border-radius: 16px;
    margin-top: 60px;
}

.cta-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.cta-content i {
    width: 48px;
    height: 48px;
    color: var(--primary-blue);
    flex-shrink: 0;
}

.cta-content h3 {
    font-size: 1.25rem;
    margin-bottom: 4px;
}

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

/* ===================================
   Hardware Comparison Table
   =================================== */

.hardware-comparison {
    max-width: 1000px;
    margin: 0 auto 40px;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
}

.comparison-table thead {
    background-color: var(--bg-dark);
}

.comparison-table th {
    padding: 16px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--border-light);
}

.comparison-table td {
    padding: 16px;
    border-bottom: 1px solid var(--border-light);
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

.table-icon {
    width: 20px;
    height: 20px;
    margin-right: 8px;
    vertical-align: middle;
}

.table-icon.success {
    color: var(--success-green);
}

.table-icon.warning {
    color: var(--warning-amber);
}

.highlight-cell {
    font-weight: 700;
    font-size: 1.125rem;
}

.success-bg {
    color: var(--success-green);
}

.warning-bg {
    color: var(--warning-amber);
}

/* ===================================
   Callout Box
   =================================== */

.callout {
    display: flex;
    gap: 16px;
    padding: 20px;
    border-radius: 12px;
    margin-top: 32px;
}

.callout-info {
    background-color: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(14, 165, 233, 0.3);
}

.callout i {
    width: 24px;
    height: 24px;
    color: var(--primary-blue);
    flex-shrink: 0;
}

.callout h4 {
    margin-bottom: 8px;
}

.callout p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===================================
   Open Source Section
   =================================== */

.opensource-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto 60px;
}

.opensource-card {
    background-color: var(--bg-card);
    border: 2px solid var(--border-light);
    border-radius: 16px;
    padding: 32px;
}

.card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    margin-bottom: 20px;
}

.card-icon i {
    width: 32px;
    height: 32px;
}

.success-bg {
    background-color: rgba(16, 185, 129, 0.2);
}

.primary-bg {
    background-color: rgba(14, 165, 233, 0.2);
}

.opensource-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.opensource-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.opensource-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.opensource-list i {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    color: var(--primary-blue);
    flex-shrink: 0;
}

.license-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background-color: var(--bg-dark);
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===================================
   GitHub Stats
   =================================== */

.github-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    padding: 32px;
    background-color: var(--bg-card);
    border-radius: 12px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.stat-item i {
    width: 32px;
    height: 32px;
    color: var(--primary-blue);
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===================================
   Use Cases Section
   =================================== */

.usecases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.usecase-card {
    background-color: var(--bg-card);
    border: 2px solid var(--border-light);
    border-radius: 16px;
    padding: 32px;
    transition: all var(--transition-normal);
}

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

.usecase-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(14, 165, 233, 0.1);
    border-radius: 12px;
    margin-bottom: 20px;
}

.usecase-icon i {
    width: 32px;
    height: 32px;
    color: var(--primary-blue);
}

.usecase-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.usecase-card > p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.usecase-features {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.usecase-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.usecase-features li::before {
    content: "→";
    color: var(--primary-blue);
}

/* ===================================
   Technical Specs Section
   =================================== */

.specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.specs-column h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    margin-bottom: 24px;
    color: var(--primary-blue);
}

.specs-column h3 i {
    width: 24px;
    height: 24px;
}

.specs-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.specs-list dt {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.specs-list dd {
    color: var(--text-secondary);
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
}

.specs-list dd:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

/* ===================================
   What's Included Section
   =================================== */

.included-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.included-category h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.125rem;
    margin-bottom: 20px;
    color: var(--primary-blue);
}

.included-category h3 i {
    width: 24px;
    height: 24px;
}

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

.checklist li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.875rem;
    line-height: 1.6;
}

.checklist i {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    color: var(--success-green);
    flex-shrink: 0;
}

/* ===================================
   Pricing Section
   =================================== */

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1100px;
    margin: 0 auto 40px;
}

.pricing-card {
    position: relative;
    background-color: var(--bg-card);
    border: 2px solid var(--border-light);
    border-radius: 16px;
    padding: 32px;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-normal);
}

.pricing-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-blue);
}

.pricing-featured {
    border-color: var(--primary-blue);
    box-shadow: 0 0 30px rgba(14, 165, 233, 0.3);
}

.pricing-badge-top {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    background-color: var(--primary-blue);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 24px;
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.pricing-badge {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--bg-dark);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.pricing-price {
    text-align: center;
    margin-bottom: 32px;
}

.pricing-price .currency {
    font-size: 1.5rem;
    vertical-align: top;
}

.pricing-price .amount {
    font-size: 3rem;
    font-weight: 700;
}

.pricing-features {
    flex: 1;
    margin-bottom: 24px;
}

.pricing-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 0.875rem;
}

.pricing-features i {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    flex-shrink: 0;
}

.pricing-features .feature-disabled {
    color: var(--text-secondary);
}

.pricing-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 16px;
    background-color: var(--bg-card);
    border-radius: 8px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===================================
   FAQ Section
   =================================== */

.faq-grid {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 16px;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.faq-question:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--primary-blue);
}

.faq-question i {
    width: 20px;
    height: 20px;
    color: var(--primary-blue);
    flex-shrink: 0;
    transition: transform var(--transition-normal);
}

.faq-question.active i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-answer p {
    padding: 20px 24px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===================================
   Final CTA Section
   =================================== */

.cta-final {
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-dark) 100%);
    padding: 100px 0;
}

.cta-final-content {
    text-align: center;
}

.cta-final-content h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.cta-final-content > p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 24px;
}

.cta-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===================================
   Footer
   =================================== */

.footer {
    background-color: var(--bg-darker);
    border-top: 1px solid var(--border-light);
    padding: 60px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
    margin-bottom: 48px;
}

.footer-column h4 {
    font-size: 1rem;
    margin-bottom: 16px;
    color: var(--primary-blue);
}

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

.footer-column a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.footer-social {
    display: flex;
    justify-content: center;
    gap: 24px;
    padding: 24px 0;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-card);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

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

.footer-social i {
    width: 20px;
    height: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footer-bottom p {
    margin-bottom: 8px;
}

.footer-bottom a {
    color: var(--primary-blue);
}

.footer-credit {
    margin-top: 16px;
}

/* ===================================
   Badges
   =================================== */

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: auto;
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.2);
    color: var(--success-green);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1199px) {
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .included-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 991px) {
    .hero-features {
        grid-template-columns: 1fr;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .opensource-grid {
        grid-template-columns: 1fr;
    }
    
    .usecases-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .github-stats {
        flex-wrap: wrap;
        gap: 24px;
    }
}

@media (max-width: 767px) {
    :root {
        --section-padding: 60px;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background-color: var(--bg-dark);
        border-top: 1px solid var(--border-light);
        padding: 16px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-normal);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-link {
        padding: 12px 0;
        border-bottom: 1px solid var(--border-light);
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .cta-banner {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-content {
        flex-direction: column;
        text-align: center;
    }
    
    .included-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .btn-lg {
        width: 100%;
    }
    
    .comparison-table {
        font-size: 0.875rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 12px 8px;
    }
}

@media (max-width: 575px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
}

/* ===================================
   Hero Visual Enhancements
   =================================== */

.hero-visual {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    opacity: 0.3;
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.2;
}

/* ===================================
   Product Showcase Section
   =================================== */

.product-showcase {
    background: var(--color-bg-secondary);
}

.demo-video {
    max-width: 900px;
    margin: 0 auto 3rem;
}

.demo-video video {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.video-caption,
.image-caption {
    text-align: center;
    margin-top: 1rem;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.product-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.gallery-item {
    text-align: center;
}

.gallery-item img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-item img:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.gallery-item p {
    margin-top: 1rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* ===================================
   Architecture Section Images
   =================================== */

.architecture-image {
    margin-bottom: 3rem;
    text-align: center;
}

.architecture-image img {
    width: 100%;
    max-width: 1200px;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

/* ===================================
   Use Case Images
   =================================== */

.usecase-image {
    width: 100%;
    height: 200px;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    overflow: hidden;
}

.usecase-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.usecase-card:hover .usecase-image img {
    transform: scale(1.05);
}

/* ===================================
   Component Photos
   =================================== */

.component-photos {
    margin-top: 4rem;
    text-align: center;
}

.component-photos h3 {
    margin-bottom: 2rem;
    font-size: 1.5rem;
}

.components-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.components-grid img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.components-grid img:hover {
    transform: scale(1.05);
}

/* ===================================
   Responsive Adjustments for Media
   =================================== */

@media (max-width: 768px) {
    /* Announcement Banner - Mobile */
    .announcement-banner {
        position: relative;
        padding: 10px 0;
    }
    
    .announcement-content {
        flex-direction: column;
        gap: 8px;
        padding: 0 16px;
    }
    
    .announcement-text {
        font-size: 0.85rem;
    }
    
    .navbar {
        top: 0;  /* Reset navbar position on mobile */
    }
    
    body {
        padding-top: 70px;  /* Only navbar on mobile, banner scrolls */
    }
    
    .product-gallery {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .components-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .hero-video,
    .hero-bg-image {
        opacity: 0.15;
    }
    
    .usecase-image {
        height: 150px;
    }
}