:root {
    
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --primary-light: #7f9cf5;
    
    
    --secondary-color: #f764a7;
    --secondary-dark: #e74694;
    --secondary-light: #f97cc1;
    
    
    --accent-orange: #f59e0b;
    --accent-teal: #14b8a6;
    --accent-green: #10b981;
    
    
    --dark-bg: #0f172a;
    --dark-surface: #1e293b;
    --dark-card: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f764a7 0%, #f59e0b 100%);
    --gradient-dark: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
    
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.5);
    
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
}


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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}


h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

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

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


.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transition: var(--transition-normal);
    z-index: -1;
}

.btn:hover::before {
    left: 100%;
}

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

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

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

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}


.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    z-index: 1000;
    transition: var(--transition-normal);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.navbar.scrolled {
    padding: 0.5rem 0;
    background: rgba(15, 23, 42, 0.95);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.logo i {
    font-size: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: rotate 10s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.logo:hover {
    transform: translateY(-2px);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
    transform: translateX(-50%);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.chat-btn {
    background: var(--gradient-primary);
    color: white !important;
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-md);
}

.chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.chat-btn::after {
    display: none;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 0.4rem;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}


.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: var(--dark-bg);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(247, 100, 167, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(20, 184, 166, 0.1) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect fill="none" stroke="%23ffffff" stroke-opacity="0.03" width="99" height="99"/></svg>');
    animation: grid-move 20s linear infinite;
}

@keyframes grid-move {
    from { transform: translate(0, 0); }
    to { transform: translate(100px, 100px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    padding: 0 2rem;
}

.hero-title {
    background: linear-gradient(135deg, #667eea 0%, #f764a7 50%, #f59e0b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

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

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--primary-color);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 2px;
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% { opacity: 1; top: 10px; }
    100% { opacity: 0; top: 30px; }
}


.fade-in {
    animation: fadeInUp 0.8s ease forwards;
}

.fade-in-delay {
    animation: fadeInUp 0.8s ease 0.3s forwards;
    opacity: 0;
}

.fade-in-delay-2 {
    animation: fadeInUp 0.8s ease 0.6s forwards;
    opacity: 0;
}

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


.section {
    padding: 6rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.section-title {
    margin-bottom: 1rem;
}

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


.design-section {
    background: var(--dark-surface);
}

.design-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.design-card {
    background: var(--dark-card);
    padding: 3rem 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.design-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.design-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.design-card h3 {
    margin-bottom: 0.75rem;
}

.design-card p {
    color: var(--text-muted);
}

.floating {
    animation: float 3s ease-in-out infinite;
}

.floating.delay-1 {
    animation-delay: 0.5s;
}

.floating.delay-2 {
    animation-delay: 1s;
}

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


.drone-types {
    background: var(--dark-bg);
}

.types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 3rem;
}

.type-card {
    background: var(--dark-surface);
    padding: 3rem;
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
    border: 2px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-normal);
}

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

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

.type-card.featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.type-card.featured::before {
    transform: scaleX(1);
    background: var(--gradient-secondary);
}

.type-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(102, 126, 234, 0.2);
    color: var(--primary-light);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.type-badge.premium {
    background: rgba(247, 100, 167, 0.2);
    color: var(--secondary-color);
}

.type-icon {
    width: 100px;
    height: 100px;
    margin: 0 0 1.5rem 0;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
}

.type-card.featured .type-icon {
    background: var(--gradient-secondary);
}

.type-title {
    margin-bottom: 0.5rem;
}

.type-subtitle {
    color: var(--accent-teal);
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.type-description {
    margin-bottom: 2rem;
}

.specs-grid {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.spec-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: var(--dark-card);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.spec-item:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateX(5px);
}

.spec-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.spec-content h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.spec-content p {
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.spec-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
}


.parts-section {
    background: var(--dark-surface);
}

.parts-showcase {
    background: var(--dark-card);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.parts-tabs {
    display: flex;
    gap: 0;
    background: var(--dark-surface);
    padding: 1rem;
}

.parts-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.parts-tab:hover {
    background: rgba(102, 126, 234, 0.1);
    color: var(--text-primary);
}

.parts-tab.active {
    background: var(--gradient-primary);
    color: white;
}

.parts-content {
    position: relative;
}

.parts-panel {
    display: none;
    padding: 3rem;
    animation: fadeIn 0.5s ease;
}

.parts-panel.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.parts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.part-card {
    background: var(--dark-surface);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

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

.part-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.part-card h4 {
    margin-bottom: 0.5rem;
    font-size: 1.125rem;
}

.part-card p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}


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

.controllers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.controller-card {
    background: var(--dark-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 2px solid rgba(255, 255, 255, 0.05);
    position: relative;
}

.controller-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.controller-card.recommended {
    border-color: var(--primary-color);
}

.recommend-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    z-index: 1;
}

.controller-card img {
    width: 100%;
    height: 180px;
    object-fit: contain;
    background: var(--dark-surface);
}

.controller-card h3 {
    padding: 1.5rem 1.5rem 0.5rem;
}

.controller-card p {
    padding: 0 1.5rem 1rem;
}

.feature-list {
    list-style: none;
    padding: 0 1.5rem 1.5rem;
}

.feature-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.feature-list i {
    color: var(--accent-green);
}

.controller-card .btn {
    margin: 0 1.5rem 1.5rem;
    width: calc(100% - 3rem);
    justify-content: center;
}

.comparison-cta {
    text-align: center;
    padding: 3rem;
    background: var(--dark-surface);
    border-radius: var(--radius-xl);
    border: 2px dashed rgba(102, 126, 234, 0.3);
}

.comparison-cta p {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}


.cta-section {
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    font-size: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

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

.cta-section .btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
}

.cta-section .btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}


.footer {
    background: var(--dark-surface);
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.footer-col p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--dark-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-3px);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.footer-tagline {
    font-size: 1.125rem;
}


.page-header {
    position: relative;
    padding: 10rem 0 6rem;
    background: var(--gradient-primary);
    text-align: center;
    margin-top: 4rem;
    overflow: hidden;
}

.page-header-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect fill="none" stroke="%23ffffff" stroke-opacity="0.05" width="99" height="99"/></svg>');
}

.page-header-content {
    position: relative;
    z-index: 1;
}

.page-title {
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: rgba(255, 255, 255, 0.8);
}

.breadcrumb a {
    color: white;
    transition: var(--transition-fast);
}

.breadcrumb a:hover {
    text-decoration: underline;
}


.build-nav-section {
    background: var(--dark-surface);
    padding: 2rem 0;
    position: sticky;
    top: 70px;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.build-nav {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.build-nav-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--dark-card);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 600;
    transition: var(--transition-fast);
    border: 2px solid transparent;
    cursor: pointer;
}

.build-nav-item:hover,
.build-nav-item.active {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
}

/* Dropdown Styles */
.build-nav-dropdown {
    position: relative;
}

.dropdown-toggle {
    border: none;
    background: none;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--dark-card);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 600;
    transition: var(--transition-fast);
    cursor: pointer;
}

.dropdown-toggle:hover {
    background: var(--primary-dark);
    color: white;
    transform: translateY(-2px);
}

.dropdown-toggle.active {
    background: var(--gradient-primary);
    color: white;
}

.dropdown-icon {
    font-size: 0.75rem;
    transition: var(--transition-fast);
}

.dropdown-toggle.active .dropdown-icon {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--dark-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-normal);
    z-index: 1000;
    margin-top: 0.5rem;
    min-width: 200px;
    border: 1px solid var(--dark-card);
}

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

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    border-bottom: 1px solid var(--dark-card);
    font-weight: 500;
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover {
    background: var(--primary-color);
    color: white;
    padding-left: 2rem;
}

.dropdown-item i {
    font-size: 0.5rem;
}


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

.build-section.alt {
    background: var(--dark-surface);
}

.build-header {
    text-align: center;
    margin-bottom: 4rem;
}

.build-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: rgba(102, 126, 234, 0.2);
    color: var(--primary-light);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.build-badge.premium {
    background: rgba(247, 100, 167, 0.2);
    color: var(--secondary-color);
}

.build-title {
    margin-bottom: 1rem;
}

.build-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
}


.guide-section {
    background: var(--dark-surface);
    border-radius: var(--radius-xl);
    padding: 3rem;
    margin-bottom: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.build-section.alt .guide-section {
    background: var(--dark-card);
}

.guide-header {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid rgba(255, 255, 255, 0.05);
}

.guide-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.guide-header h3 {
    margin-bottom: 0.5rem;
}

.guide-header p {
    color: var(--text-muted);
    margin: 0;
}

.guide-content {
    padding-left: 5rem;
}


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

.pinout-card {
    background: var(--dark-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-normal);
}

.pinout-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.pinout-card h4 {
    margin-bottom: 1rem;
    color: var(--primary-light);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.pinout-card ul {
    list-style: none;
}

.pinout-card li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.pinout-card li:last-child {
    border-bottom: none;
}

.pinout-card strong {
    color: var(--text-primary);
}


.assembly-steps,
.connection-steps {
    display: grid;
    gap: 2rem;
}

.step-card,
.connection-card {
    background: var(--dark-card);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-left: 4px solid var(--primary-color);
    position: relative;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: var(--transition-normal);
}

.step-card:hover,
.connection-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 8px 16px rgba(102, 126, 234, 0.15);
    transform: translateY(-2px);
}

.step-number,
.connection-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    height: 60px;
    padding: 0 1rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.5rem;
    color: white;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.step-card h4,
.connection-card h4 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.step-card p,
.connection-card p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.step-card ul,
.connection-card ul {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.step-card ul li,
.connection-card ul li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    line-height: 1.6;
}

.step-card ul li:last-child,
.connection-card ul li:last-child {
    border-bottom: none;
}

.step-card ul li::before,
.connection-card ul li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.step-tips {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(102, 126, 234, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.step-tips i {
    color: var(--accent-orange);
    margin-top: 0.2rem;
}


.circuit-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.circuit-card {
    background: var(--dark-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    transition: var(--transition-normal);
}

.circuit-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.circuit-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.circuit-card h4 {
    margin-bottom: 1rem;
}

.circuit-card ul {
    list-style: none;
    text-align: left;
}

.circuit-card li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.circuit-card li::before {
    content: '▸';
    color: var(--primary-color);
    flex-shrink: 0;
}


.setup-accordion {
    display: grid;
    gap: 1rem;
}

.accordion-item {
    background: var(--dark-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.accordion-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition-fast);
    background: var(--dark-card);
}

.accordion-header:hover {
    background: rgba(102, 126, 234, 0.1);
}

.accordion-header i:first-child {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.accordion-header span {
    flex: 1;
    font-weight: 600;
}

.accordion-header i:last-child {
    transition: var(--transition-fast);
}

.accordion-item.active .accordion-header i:last-child {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.accordion-item.active .accordion-content {
    max-height: 2000px;
}

.accordion-content ol {
    padding: 0 1.5rem 1.5rem 3rem;
}

.accordion-content li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

.warning-box,
.info-box {
    margin: 1.5rem;
    padding: 1rem;
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--accent-orange);
    border-radius: var(--radius-sm);
    display: flex;
    gap: 1rem;
}

.info-box {
    background: rgba(102, 126, 234, 0.1);
    border-left-color: var(--primary-color);
}

.warning-box i,
.info-box i {
    color: var(--accent-orange);
    font-size: 1.25rem;
    margin-top: 0.2rem;
}

.info-box i {
    color: var(--primary-color);
}


.pid-settings {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.pid-card {
    background: rgba(102, 126, 234, 0.1);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--primary-color);
}

.pid-card h5 {
    margin-bottom: 1rem;
    color: var(--primary-light);
}

.pid-card ul {
    list-style: none;
}

.pid-card li {
    padding: 0.25rem 0;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
}


.internal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.internal-card {
    background: var(--dark-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-normal);
}

.internal-card:hover {
    border-color: var(--secondary-color);
    transform: translateY(-5px);
}

.internal-card h4 {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    color: var(--secondary-color);
}


.software-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.software-card {
    text-align: center;
    padding: 2rem;
    background: var(--dark-card);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.software-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-teal);
}

.software-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1rem;
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.software-card h4 {
    margin-bottom: 0.75rem;
    font-size: 1.125rem;
}

.software-card p {
    font-size: 0.875rem;
    margin: 0;
}


.video-section {
    background: var(--dark-surface);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.video-card {
    background: var(--dark-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.video-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.video-thumbnail {
    position: relative;
    overflow: hidden;
    height: 225px;
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.1);
}

.video-thumbnail i {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 4rem;
    color: white;
    opacity: 0.9;
    transition: var(--transition-normal);
}

.video-card:hover .video-thumbnail i {
    transform: translate(-50%, -50%) scale(1.2);
}

.video-content {
    padding: 2rem;
}

.video-content h3 {
    margin-bottom: 0.75rem;
}

.video-content p {
    margin-bottom: 1rem;
}

.video-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 600;
    transition: var(--transition-fast);
}

.video-link:hover {
    gap: 0.75rem;
}

.blog-reference {
    display: flex;
    gap: 2rem;
    align-items: center;
    padding: 3rem;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
}

.blog-icon {
    width: 80px;
    height: 80px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--primary-dark);
    flex-shrink: 0;
}

.blog-content {
    flex: 1;
}

.blog-content h3 {
    margin-bottom: 0.75rem;
}

.blog-content p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1.5rem;
}

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


.mission-section {
    background: var(--dark-surface);
}

.mission-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.mission-text h2 {
    margin-bottom: 1.5rem;
}

.mission-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.mission-image {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    position: relative;
}

.mission-image .floating-card {
    background: var(--dark-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.mission-image .floating-card:first-child {
    grid-column: 1 / -1;
}

.mission-image .floating-card i {
    font-size: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

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

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.team-card {
    background: var(--dark-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 2px solid rgba(255, 255, 255, 0.05);
}

.team-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.team-card.featured {
    border-color: var(--primary-color);
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 320px 1fr;
    align-items: stretch;
}

.team-card.special {
    border-color: var(--accent-teal);
}

.team-image {
    position: relative;
    height: 300px;
    overflow: hidden;
}

.team-card.featured .team-image {
    height: auto;
    min-height: 260px;
}

.team-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 20%;
    transition: var(--transition-slow);
}

.team-card:hover .team-image img {
    transform: scale(1.1);
}

.team-card.featured .team-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 2rem;
}

@media (max-width: 768px) {
    .team-card.featured {
        grid-template-columns: 1fr;
    }
    .team-card.featured .team-image {
        height: 300px;
    }
}

.team-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.team-card:hover .team-overlay {
    opacity: 1;
}

.team-social {
    display: flex;
    gap: 1rem;
}

.team-social a {
    width: 50px;
    height: 50px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-dark);
    font-size: 1.25rem;
    transition: var(--transition-fast);
}

.team-social a:hover {
    transform: translateY(-5px);
    background: var(--gradient-primary);
    color: white;
}

.team-content {
    padding: 2rem;
}

.team-content h3 {
    margin-bottom: 0.5rem;
}

.team-role {
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: 1rem;
}

.team-bio {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.team-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(102, 126, 234, 0.1);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--primary-light);
}

.community-card {
    background: var(--gradient-primary);
    padding: 3rem;
    border-radius: var(--radius-xl);
    display: flex;
    gap: 2rem;
    align-items: center;
}

.community-icon {
    width: 100px;
    height: 100px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--primary-dark);
    flex-shrink: 0;
}

.community-content h3 {
    margin-bottom: 0.5rem;
}

.community-subtitle {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.community-content p {
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
}


.values-section {
    background: var(--dark-surface);
}

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

.value-card {
    background: var(--dark-card);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.value-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.value-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.value-card h3 {
    margin-bottom: 0.75rem;
}

.value-card p {
    margin: 0;
}


.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
    box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}


@media (max-width: 968px) {
    .types-grid {
        grid-template-columns: 1fr;
    }
    
    .mission-content {
        grid-template-columns: 1fr;
    }
    
    .mission-stats {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .guide-content {
        padding-left: 0;
    }
    
    .guide-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .blog-reference {
        flex-direction: column;
        text-align: center;
    }
    
    .community-card {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 2rem;
        transition: var(--transition-normal);
        overflow-y: auto;
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-link {
        width: 100%;
        padding: 1rem;
        text-align: center;
        font-size: 1.125rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .btn {
        justify-content: center;
        padding: 0.875rem 1.5rem;
        font-size: 0.95rem;
    }
    
    .parts-tabs {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .parts-tab {
        text-align: center;
        padding: 1rem;
    }
    
    .controllers-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .parts-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .setup-grid {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .mission-stats {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .step-card {
        padding: 1.5rem;
    }
    
    .accordion-content {
        padding: 1rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .team-card.featured {
        grid-column: 1;
    }
    
    .build-nav {
        flex-direction: column;
    }
    
    .build-nav-item {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero {
        height: 85vh;
        padding-top: 80px;
    }
    
    h1 { font-size: 1.875rem; }
    h2 { font-size: 1.625rem; }
    h3 { font-size: 1.375rem; }
    
    .container {
        padding: 0 1rem;
    }
    
    .section {
        padding: 2.5rem 0;
    }
    
    .section-header {
        margin-bottom: 1.5rem;
    }
    
    .page-header {
        padding: 7rem 0 3rem;
    }
    
    .guide-section {
        padding: 1.5rem 1rem;
    }
    
    .pinout-grid,
    .circuit-grid,
    .internal-grid,
    .software-steps {
        grid-template-columns: 1fr;
    }
    
    .type-card,
    .part-card,
    .controller-card,
    .team-card,
    .video-card {
        padding: 1.25rem;
    }
    
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .navbar {
        padding: 0.75rem 0;
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .stat-card {
        padding: 1.25rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .accordion-header {
        padding: 1rem;
        font-size: 1rem;
    }
    
    .step-number {
        min-width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}


@media print {
    .navbar,
    .hamburger,
    .scroll-indicator,
    .back-to-top,
    .cta-section,
    .footer {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}


@media (hover: none) and (pointer: coarse) {
    .btn,
    .nav-link,
    .parts-tab,
    .accordion-header,
    .build-nav-item {
        -webkit-tap-highlight-color: transparent;
        touch-action: manipulation;
    }
    
    .type-card:active,
    .part-card:active,
    .controller-card:active,
    .team-card:active,
    .video-card:active {
        transform: scale(0.98);
    }
    
    .btn:active {
        transform: translateY(0) scale(0.97);
    }
    
    .parts-tab {
        min-height: 48px;
    }
    
    .accordion-header {
        min-height: 52px;
    }
}


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

button,
a,
input,
textarea,
select {
    -webkit-tap-highlight-color: rgba(102, 126, 234, 0.2);
}

/* ========================================
   PARTS PAGE STYLING - Clean & Modern
   ======================================== */

.parts-page .supplier-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.parts-page .supplier-card {
    background: var(--dark-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: var(--transition-normal);
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.parts-page .supplier-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.parts-page .supplier-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
}

.parts-page .supplier-card.fpv .supplier-icon {
    background: var(--gradient-secondary);
}

.parts-page .supplier-card h3 {
    font-size: 1.5rem;
    margin: 0;
    color: var(--text-primary);
}

.parts-page .supplier-card .btn {
    width: 100%;
    margin-top: auto;
}

/* 3D Designs Page Styling */
.designs-page .models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.designs-page .model-card {
    background: var(--dark-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.designs-page .model-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
}

.designs-page .model-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.designs-page .model-card > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.designs-page .model-embed {
    width: 100%;
    height: 300px;
    background: var(--dark-surface);
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.designs-page .model-embed iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.designs-page .model-info {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.designs-page .model-info span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--dark-surface);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.designs-page .model-info i {
    color: var(--primary-color);
}

.designs-page .downloads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.designs-page .download-card {
    background: var(--dark-card);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.designs-page .download-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.designs-page .download-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin: 0 auto 1.5rem;
}

.designs-page .download-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.designs-page .download-card p {
    margin-bottom: 2rem;
}

/* About Page - Department Structure */
.team-category {
    margin-bottom: 4rem;
}

.category-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.category-title i {
    font-size: 1.8rem;
}

/* Department Head - Large Card */
.team-category > .team-grid:first-of-type {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

/* Team Members under head - 2x2 Grid */
.team-category h4 {
    font-size: 1.5rem;
    margin: 2rem 0 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.team-category h4 + .team-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

/* Team Card Base */
.team-card {
    background: var(--dark-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

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

.team-card.featured {
    border-color: rgba(102, 126, 234, 0.3);
}

.team-image {
    position: relative;
    width: 100%;
    height: 280px;
    overflow: hidden;
}

.team-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 20%;
    transition: var(--transition-slow);
}

.team-card:hover .team-image img {
    transform: scale(1.1);
}

.team-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

.team-card:hover .team-overlay {
    opacity: 1;
}

.team-social {
    display: flex;
    gap: 1rem;
}

.team-social a {
    width: 45px;
    height: 45px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    transition: var(--transition-fast);
}

.team-social a:hover {
    background: var(--primary-light);
    transform: scale(1.1);
}

.team-content {
    padding: 2rem;
}

.team-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.team-role {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.team-bio {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.team-badges {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.team-badges .badge {
    background: var(--dark-surface);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.team-badges .badge i {
    color: var(--primary-color);
}

/* Mobile Responsive */
@media (max-width: 1024px) {
    .team-category h4 + .team-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .parts-page .supplier-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .team-category h4 + .team-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .team-category > .team-grid:first-of-type {
        grid-template-columns: 1fr;
    }
    
    .parts-page .supplier-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .designs-page .models-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .designs-page .downloads-grid {
        grid-template-columns: 1fr;
    }
    
    .category-title {
        font-size: 1.5rem;
    }
    
    .team-image {
        height: 250px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .parts-page .supplier-card {
        padding: 1.5rem;
    }
    
    .parts-page .supplier-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
    
    .team-content {
        padding: 1.5rem;
    }
    
    .team-image {
        height: 220px;
    }
}

/* ========================================
   QUIZ SECTION STYLING
   ======================================== */

.quiz-section {
    background: var(--dark-bg);
    padding: 4rem 0;
}

.quiz-container {
    max-width: 800px;
    margin: 3rem auto 0;
}

.quiz-card {
    background: var(--dark-card);
    border-radius: var(--radius-xl);
    padding: 3rem;
    border: 2px solid rgba(102, 126, 234, 0.2);
    box-shadow: var(--shadow-xl);
}

.quiz-progress {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: var(--dark-surface);
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 10px;
    transition: width 0.3s ease;
    width: 25%;
}

.progress-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.question {
    display: none;
}

.question.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

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

.question-title {
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
    text-align: center;
}

.options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.option-btn {
    background: var(--dark-surface);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: left;
    cursor: pointer;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.option-btn:hover {
    border-color: var(--primary-color);
    transform: translateX(8px);
    box-shadow: var(--shadow-glow);
}

.option-btn i {
    font-size: 2.5rem;
    color: var(--primary-color);
    min-width: 50px;
}

.option-btn > div {
    flex: 1;
}

.option-btn span {
    display: block;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.option-btn p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

.option-btn:active {
    transform: scale(0.98);
}

/* Quiz Results */
.quiz-result {
    text-align: center;
    animation: fadeIn 0.5s ease;
}

.result-icon {
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    font-size: 3rem;
    color: white;
    animation: scaleIn 0.5s ease;
}

@keyframes scaleIn {
    from {
        transform: scale(0);
    }
    to {
        transform: scale(1);
    }
}

.result-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.result-content {
    background: var(--dark-surface);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    border-left: 4px solid var(--primary-color);
}

.result-content h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.result-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.result-content ul {
    text-align: left;
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
}

.result-content ul li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.result-content ul li::before {
    content: "✓";
    color: var(--accent-green);
    font-weight: bold;
    font-size: 1.2rem;
}

.result-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.result-actions .btn {
    min-width: 200px;
}

/* Mobile Responsive for Quiz */
@media (max-width: 768px) {
    .quiz-card {
        padding: 2rem;
    }
    
    .question-title {
        font-size: 1.4rem;
    }
    
    .option-btn {
        padding: 1.2rem;
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .option-btn i {
        font-size: 2rem;
    }
    
    .option-btn:hover {
        transform: translateY(-5px);
    }
    
    .result-actions {
        flex-direction: column;
    }
    
    .result-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .quiz-card {
        padding: 1.5rem;
    }
    
    .quiz-progress {
        flex-direction: column;
        align-items: stretch;
    }
    
    .progress-text {
        text-align: center;
    }
}

/* Builds: image collage */
.image-collage {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin: 16px 0 8px;
}

.image-collage img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 8px;
    background: var(--dark-surface);
}

@media (max-width: 1024px) {
    .image-collage { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .image-collage { grid-template-columns: repeat(2, 1fr); }
    .image-collage img { height: 160px; }
}

@media (max-width: 480px) {
    .image-collage { grid-template-columns: 1fr; }
    .image-collage img { height: 200px; }
}