/* Reset and Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-blue: #1e40af;
    --primary-blue-dark: #1e3a8a;
    --secondary-purple: #7c3aed;
    --accent-orange: #f97316;
    --accent-yellow: #fbbf24;
    --success-green: #10b981;
    --warning-red: #ef4444;
    
    /* Neutral Colors */
    --white: #ffffff;
    --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;
    
    /* Theme Colors */
    --bg-primary: var(--white);
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-700);
    --text-muted: var(--gray-500);
    --border-color: var(--gray-200);
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-purple) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--accent-orange) 0%, var(--accent-yellow) 100%);
    --gradient-success: linear-gradient(135deg, var(--success-green) 0%, #059669 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-xs: 0.75rem;
    --font-sm: 0.875rem;
    --font-base: 1rem;
    --font-lg: 1.125rem;
    --font-xl: 1.25rem;
    --font-2xl: 1.5rem;
    --font-3xl: 1.875rem;
    --font-4xl: 2.25rem;
    --font-5xl: 3rem;
    --font-6xl: 3.75rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: var(--gray-900);
    --bg-secondary: var(--gray-800);
    --bg-tertiary: var(--gray-700);
    --text-primary: var(--white);
    --text-secondary: var(--gray-300);
    --text-muted: var(--gray-400);
    --border-color: var(--gray-700);
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Animated Background */
#nodes-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.4;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 100px;
    right: var(--spacing-lg);
    width: 50px;
    height: 50px;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1000;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

.theme-toggle i {
    font-size: var(--font-xl);
    color: var(--primary-blue);
    transition: transform var(--transition-base);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 999;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: rgba(17, 24, 39, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    font-size: var(--font-2xl);
    font-weight: 800;
    color: var(--primary-blue);
    transition: transform var(--transition-base);
}

.nav-logo a:hover {
    transform: scale(1.05);
}

.nav-logo i {
    font-size: var(--font-3xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: var(--font-base);
    transition: color var(--transition-base);
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-menu a:hover::after {
    width: 100%;
}

.cta-button {
    background: var(--gradient-primary) !important;
    color: var(--white) !important;
    padding: var(--spacing-sm) var(--spacing-lg) !important;
    border-radius: var(--radius-full) !important;
    font-weight: 600 !important;
    transition: all var(--transition-base) !important;
    box-shadow: var(--shadow-md);
}

.cta-button:hover {
    transform: translateY(-2px) !important;
    box-shadow: var(--shadow-lg) !important;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

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

/* Hero Section */
.hero {
    background: var(--gradient-primary);
    padding: 120px 0 80px;
    color: var(--white);
    overflow: hidden;
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%" r="50%"><stop offset="0%" stop-color="white" stop-opacity="0.1"/><stop offset="100%" stop-color="white" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="300" r="100" fill="url(%23a)"/><circle cx="800" cy="200" r="150" fill="url(%23a)"/><circle cx="600" cy="700" r="120" fill="url(%23a)"/></svg>');
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--font-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-title {
    font-size: var(--font-6xl);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.highlight {
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-xl);
    line-height: 1.7;
    margin-bottom: var(--spacing-2xl);
    opacity: 0.95;
    max-width: 600px;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

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

.stat-number {
    font-size: var(--font-3xl);
    font-weight: 800;
    color: var(--accent-yellow);
    display: block;
    line-height: 1;
}

.stat-label {
    font-size: var(--font-sm);
    opacity: 0.9;
    margin-top: var(--spacing-xs);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--gradient-secondary);
    color: var(--gray-900);
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 700;
    font-size: var(--font-lg);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-2xl);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    padding: var(--spacing-lg) var(--spacing-2xl);
    border: 2px solid rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-lg);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-base);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
    transform: translateY(-2px);
}

.hero-trust {
    margin-bottom: var(--spacing-xl);
}

.trust-icons {
    display: flex;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-sm);
    opacity: 0.9;
}

.trust-item i {
    color: var(--accent-yellow);
    font-size: var(--font-lg);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image-container {
    position: relative;
    max-width: 500px;
    width: 100%;
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
}

.floating-elements {
    position: absolute;
    inset: 0;
}

.floating-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: var(--radius-xl);
    color: var(--gray-900);
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: floatCard 6s ease-in-out infinite;
}

.floating-card.temperature {
    top: 15%;
    right: -10%;
    animation-delay: 0s;
}

.floating-card.security {
    top: 45%;
    left: -15%;
    animation-delay: 1.5s;
}

.floating-card.lights {
    bottom: 35%;
    right: -5%;
    animation-delay: 3s;
}

.floating-card.energy {
    bottom: 10%;
    left: -10%;
    animation-delay: 4.5s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-15px) rotate(1deg); }
    66% { transform: translateY(10px) rotate(-1deg); }
}

.floating-card i {
    font-size: var(--font-lg);
    color: var(--primary-blue);
}

.card-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: var(--radius-xl);
    background: var(--primary-blue);
    opacity: 0.2;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.2; }
    50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.1; }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 0.2; }
}

.hero-scroll-indicator {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--white);
    opacity: 0.8;
    animation: bounce 2s ease-in-out infinite;
}

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

.scroll-line {
    width: 2px;
    height: 30px;
    background: var(--white);
    opacity: 0.6;
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { height: 30px; opacity: 0.6; }
    50% { height: 40px; opacity: 1; }
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: var(--font-4xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: var(--font-xl);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Problem Section */
.problem-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.problem-card {
    background: var(--bg-primary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base);
    position: relative;
    overflow: hidden;
}

.problem-card:hover {
    transform: translateY(-8px);
}

.problem-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.problem-icon {
    position: relative;
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
}

.problem-icon i {
    font-size: var(--font-3xl);
    color: var(--white);
}

.icon-overlay {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--warning-red);
    color: var(--white);
    width: 25px;
    height: 25px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-sm);
    font-weight: 700;
}

.problem-card h3 {
    font-size: var(--font-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

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

.problem-cta {
    text-align: center;
    padding: var(--spacing-2xl);
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
}

.problem-cta h3 {
    font-size: var(--font-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

/* Demo Section */
.demo-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-primary);
}

.demo-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.demo-text h2 {
    font-size: var(--font-4xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.demo-text p {
    font-size: var(--font-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

.demo-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.demo-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.demo-feature i {
    color: var(--success-green);
    font-size: var(--font-lg);
}

.video-container {
    position: relative;
}

.video-placeholder {
    position: relative;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
}

.video-placeholder img {
    width: 100%;
    height: auto;
}

.video-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.play-button {
    width: 80px;
    height: 80px;
    background: var(--white);
    border: none;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-xl);
}

.play-button:hover {
    transform: scale(1.1);
}

.play-button i {
    font-size: var(--font-2xl);
    color: var(--primary-blue);
    margin-left: 4px;
}

.video-duration {
    position: absolute;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background: rgba(0, 0, 0, 0.8);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-sm);
    font-weight: 500;
}

/* Continue with remaining sections... */

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-2xl);
    }
    
    .demo-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: var(--transition-base);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-lg) 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-title {
        font-size: var(--font-4xl);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .trust-icons {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .problem-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: var(--font-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-lg);
    }
    
    .floating-card {
        display: none;
    }
}