/* ============================================ */
/* AI Smart Classroom - Professional Website Styles */
/* ============================================ */

/* CSS Variables - AI Education Theme */
:root {
    /* Primary - AI Purple/Blue */
    --primary: #8B5CF6;
    --primary-dark: #7C3AED;
    --primary-light: #A78BFA;
    --primary-glow: rgba(139, 92, 246, 0.4);
    
    /* Secondary - Tech Blue */
    --secondary: #3B82F6;
    --secondary-light: #60A5FA;
    
    /* Accent - Success Green */
    --accent: #10B981;
    --accent-light: #34D399;
    
    /* Warning - Education Yellow */
    --warning: #F59E0B;
    --warning-light: #FBBF24;
    
    /* Background - Dark Tech Theme */
    --bg-dark: #030712;
    --bg-darker: #000000;
    --bg-card: #111827;
    --bg-elevated: #1F2937;
    --bg-gradient: linear-gradient(180deg, #030712 0%, #111827 50%, #030712 100%);
    
    /* Borders */
    --border: #374151;
    --border-light: #4B5563;
    --border-glow: rgba(139, 92, 246, 0.3);
    
    /* Text */
    --text-primary: #F9FAFB;
    --text-secondary: #D1D5DB;
    --text-muted: #9CA3AF;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 100%);
    --gradient-hero: radial-gradient(ellipse at top, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    --gradient-card: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    --gradient-text: linear-gradient(135deg, #F9FAFB 0%, #9CA3AF 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.7);
    --shadow-glow: 0 0 30px rgba(139, 92, 246, 0.3);
    --shadow-glow-strong: 0 0 50px rgba(139, 92, 246, 0.5);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Typography */
    --font-sans: 'Inter', 'Noto Sans Devanagari', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-hindi: 'Noto Sans Devanagari', sans-serif;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: clamp(1rem, 2vw, 1.25rem); }

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

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

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

/* ============================================ */
/* Navigation */
/* ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    background: rgba(3, 7, 18, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    padding: var(--space-sm) 0;
    background: rgba(3, 7, 18, 0.95);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.logo-icon {
    font-size: 1.5rem;
    filter: drop-shadow(0 0 10px rgba(139, 92, 246, 0.5));
}

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

.nav-link {
    padding: var(--space-sm) var(--space-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-elevated);
}

.nav-cta {
    background: var(--gradient-primary);
    color: var(--text-primary) !important;
    margin-left: var(--space-md);
    box-shadow: var(--shadow-glow);
}

.nav-cta:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow-strong);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all var(--transition-fast);
}

/* Mobile Navigation */
@media (max-width: 1024px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-dark);
        padding: var(--space-lg);
        gap: var(--space-sm);
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-link {
        width: 100%;
        padding: var(--space-md);
    }
    
    .nav-cta {
        margin-left: 0;
        margin-top: var(--space-sm);
    }
}

/* ============================================ */
/* Hero Section - Powerful First Impression */
/* ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    padding: var(--space-4xl) 0;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: var(--bg-dark);
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(139, 92, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(139, 92, 246, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

/* Floating Elements Animation */
.floating-elements {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.float-element {
    position: absolute;
    font-size: 2rem;
    opacity: 0.1;
    animation: float 20s infinite ease-in-out;
}

.e1 { top: 15%; left: 10%; animation-delay: 0s; }
.e2 { top: 25%; right: 15%; animation-delay: 3s; }
.e3 { top: 60%; left: 5%; animation-delay: 6s; }
.e4 { bottom: 30%; right: 10%; animation-delay: 9s; }
.e5 { top: 45%; left: 20%; animation-delay: 12s; }
.e6 { bottom: 20%; left: 25%; animation-delay: 15s; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-30px) rotate(5deg); }
    50% { transform: translateY(-10px) rotate(-5deg); }
    75% { transform: translateY(-20px) rotate(3deg); }
}

/* Gradient Orbs */
.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
}

.orb1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
    top: -200px;
    right: -200px;
}

.orb2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--secondary) 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
}

.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: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease-out;
}

.badge-icon {
    font-size: 1rem;
    animation: pulse 2s infinite;
}

.hero-title {
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.title-main {
    display: block;
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--space-sm);
}

.title-sub {
    display: block;
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 600;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.01em;
}

.hero-description {
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--space-2xl);
    line-height: 1.8;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-3xl);
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    letter-spacing: -0.01em;
}

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

.btn-glow {
    position: relative;
    overflow: hidden;
}

.btn-glow::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 30%, rgba(255,255,255,0.2) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn-glow:hover::before {
    transform: translateX(100%);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-strong);
}

.btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

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

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-xl);
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

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

.stat-icon {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
    display: block;
}

.stat-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-light);
    letter-spacing: -0.01em;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: var(--border);
}

/* Hero Visual Card */
.hero-visual {
    position: absolute;
    right: 5%;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1;
    display: none;
}

@media (min-width: 1400px) {
    .hero-visual {
        display: block;
    }
}

.visual-wrapper {
    position: relative;
}

.visual-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.main-card {
    width: 340px;
    animation: floatCard 6s ease-in-out infinite;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
}

.status-dot.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

.card-content {
    padding: var(--space-xl) var(--space-lg);
}

.ai-brain {
    position: relative;
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-xl);
}

.brain-icon {
    font-size: 3rem;
    filter: drop-shadow(0 0 20px rgba(139, 92, 246, 0.6));
}

.brain-pulse {
    position: absolute;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    opacity: 0;
    animation: brainPulse 2s infinite;
}

@keyframes brainPulse {
    0% { transform: scale(0.8); opacity: 0.8; }
    100% { transform: scale(1.5); opacity: 0; }
}

.pipeline-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
}

.pipe-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.pipe-step.active .step-icon-wrap {
    background: var(--gradient-primary);
    box-shadow: var(--shadow-glow);
}

.step-icon-wrap {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.step-icon {
    font-size: 1.5rem;
}

.step-label {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.pipe-arrow {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.secondary-card {
    position: absolute;
    bottom: -60px;
    left: -30px;
    width: 200px;
    background: var(--bg-card);
    animation: floatCard 6s ease-in-out infinite 1s;
}

.mini-stat {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
}

.mini-icon {
    font-size: 1.25rem;
}

.mini-value {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Hero Scroll */
.hero-scroll {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-muted);
    font-size: 0.75rem;
    animation: bounce 2s infinite;
}

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

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

/* ============================================ */
/* Sections Common */
/* ============================================ */
.section {
    padding: var(--space-4xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-lg);
    background: var(--gradient-primary);
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: 50px;
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.02em;
}

/* ============================================ */
/* Problem Section */
/* ============================================ */
.problem-section {
    background: var(--bg-gradient);
}

.problem-content {
    max-width: 1100px;
    margin: 0 auto;
}

.problem-main {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    display: block;
}

.problem-main h3 {
    font-size: 1.75rem;
    margin-bottom: var(--space-lg);
}

.problem-text {
    font-size: 1.15rem;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

.problem-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-normal);
}

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

.p-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    display: block;
}

.problem-card h4 {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.problem-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.problem-highlight {
    background: var(--gradient-card);
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    max-width: 800px;
    margin: 0 auto;
}

.problem-highlight p {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 0;
}

/* ============================================ */
/* Solution Section */
/* ============================================ */
.solution-section {
    background: var(--bg-dark);
}

.solution-content {
    max-width: 1100px;
    margin: 0 auto;
}

.solution-intro {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.solution-icon-wrap {
    position: relative;
    display: inline-block;
    margin-bottom: var(--space-xl);
}

.solution-icon {
    font-size: 4rem;
    display: block;
    filter: drop-shadow(0 0 30px rgba(139, 92, 246, 0.6));
    position: relative;
    z-index: 1;
}

.icon-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100px;
    height: 100px;
    border: 2px solid var(--primary);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.3;
    animation: ringPulse 3s infinite;
}

@keyframes ringPulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.2); }
}

.solution-intro h3 {
    font-size: 2rem;
    margin-bottom: var(--space-lg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.solution-text {
    font-size: 1.15rem;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.solution-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.sol-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-normal);
}

.sol-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-3px);
}

.sol-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
    display: block;
}

.sol-card h4 {
    font-size: 1.15rem;
    margin-bottom: var(--space-sm);
}

.sol-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin: 0;
}

/* ============================================ */
/* Workflow Section */
/* ============================================ */
.workflow-section {
    background: var(--bg-gradient);
}

.workflow-content {
    max-width: 900px;
    margin: 0 auto;
}

.workflow-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    margin-bottom: var(--space-3xl);
}

.workflow-step {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl) var(--space-2xl);
    width: 100%;
    max-width: 500px;
    position: relative;
    transition: all var(--transition-normal);
}

.workflow-step:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.workflow-step.output {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(16, 185, 129, 0.1) 100%);
}

.workflow-icon {
    font-size: 2.5rem;
    min-width: 60px;
    text-align: center;
}

.workflow-info {
    flex: 1;
}

.workflow-info h4 {
    font-size: 1.1rem;
    margin-bottom: var(--space-xs);
}

.workflow-info p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

.workflow-number {
    position: absolute;
    top: -12px;
    left: var(--space-lg);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 700;
    border-radius: 50%;
}

.workflow-arrow {
    color: var(--primary);
    padding: var(--space-sm) 0;
}

.workflow-arrow svg {
    opacity: 0.5;
}

.workflow-output {
    text-align: center;
}

.workflow-output h4 {
    margin-bottom: var(--space-lg);
}

.output-items {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
}

.output-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ============================================ */
/* Features Section */
/* ============================================ */
.features-section {
    background: var(--bg-dark);
}

.features-content {
    max-width: 1100px;
    margin: 0 auto;
}

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

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    transition: all var(--transition-normal);
}

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

.feature-card.featured {
    background: var(--gradient-card);
    border-color: var(--primary);
    grid-column: span 2;
}

@media (max-width: 768px) {
    .feature-card.featured {
        grid-column: span 1;
    }
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
    display: block;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin: 0;
}

/* ============================================ */
/* Technology Section */
/* ============================================ */
.tech-section {
    background: var(--bg-gradient);
}

.tech-content {
    max-width: 1100px;
    margin: 0 auto;
}

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

.tech-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-normal);
}

.tech-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
}

.tech-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.tech-card h4 {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.tech-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: var(--space-sm);
}

.tech-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

.architecture-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
}

.architecture-box h4 {
    text-align: center;
    margin-bottom: var(--space-xl);
    font-size: 1.25rem;
}

.arch-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.arch-layer {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-md) var(--space-xl);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 600px;
}

.arch-layer.output {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--bg-elevated) 0%, rgba(16, 185, 129, 0.15) 100%);
}

.layer-label {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--primary-light);
    min-width: 100px;
}

.layer-items {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.layer-items span {
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.arch-arrow {
    color: var(--primary);
    font-size: 1.5rem;
    opacity: 0.5;
}

/* ============================================ */
/* Future Section */
/* ============================================ */
.future-section {
    background: var(--bg-dark);
}

.future-content {
    max-width: 1200px;
    margin: 0 auto;
}

.future-intro {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.future-icon-big {
    font-size: 5rem;
    margin-bottom: var(--space-xl);
    display: block;
    filter: drop-shadow(0 0 40px rgba(139, 92, 246, 0.5));
}

.future-intro h3 {
    font-size: 2rem;
    margin-bottom: var(--space-lg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.future-intro p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-secondary);
}

.future-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.future-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    transition: all var(--transition-normal);
}

.future-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
}

.future-card.highlighted {
    background: var(--gradient-card);
    border-color: var(--accent);
}

.future-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.future-card h4 {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.future-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.timeframe {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-elevated);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.future-card.highlighted .timeframe {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent);
}

/* ============================================ */
/* Creator Section */
/* ============================================ */
.creator-section {
    background: var(--bg-gradient);
}

.creator-content {
    max-width: 900px;
    margin: 0 auto;
}

.creator-card {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--space-2xl);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-2xl);
    padding: var(--space-2xl);
    align-items: start;
}

@media (max-width: 768px) {
    .creator-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

.creator-image {
    width: 100%;
    max-width: 280px;
    aspect-ratio: 3/4;
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin: 0 auto;
    border: 3px solid var(--border);
}

.creator-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
}

@media (max-width: 768px) {
    .creator-image {
        max-width: 220px;
        aspect-ratio: 3/4;
    }
}

.creator-name {
    font-size: 1.75rem;
    margin-bottom: var(--space-xs);
}

.creator-role {
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.creator-project {
    color: var(--text-muted);
}

.creator-designation {
    margin-top: var(--space-lg);
}

.creator-position {
    color: var(--text-secondary);
}

.creator-location {
    margin-top: var(--space-md);
}

.creator-school,
.creator-address {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin: 0;
}

.creator-qualifications {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
}

.creator-qualifications h4 {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

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

.creator-bio {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
}

.creator-bio p {
    font-size: 0.95rem;
    line-height: 1.7;
    margin: 0;
}

/* ============================================ */
/* Contact Section */
/* ============================================ */
.contact-section {
    background: var(--bg-dark);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-intro {
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: var(--space-2xl);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.contact-item:hover {
    border-color: var(--border-light);
}

.contact-item.email-highlight {
    border-color: var(--primary);
    background: var(--gradient-card);
}

.contact-icon {
    font-size: 2rem;
    min-width: 50px;
    text-align: center;
}

.contact-text h4 {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.contact-email {
    font-size: 1.1rem;
    color: var(--primary-light);
    font-weight: 600;
    word-break: break-all;
}

.contact-email:hover {
    color: var(--text-primary);
}

.contact-phone {
    color: var(--text-secondary);
}

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

/* ============================================ */
/* Footer */
/* ============================================ */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-2xl);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    display: block;
}

.footer-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.footer-email {
    margin-top: var(--space-md);
}

.footer-email a {
    color: var(--primary-light);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: var(--space-3xl);
}

.footer-column h5 {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-column a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

/* ============================================ */
/* Responsive Design */
/* ============================================ */
@media (max-width: 768px) {
    .hero {
        padding: var(--space-3xl) 0;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    .hero-stats {
        gap: var(--space-md);
    }
    
    .stat-divider {
        display: none;
    }
    
    .stat-item {
        padding: 0 var(--space-sm);
    }
    
    .section {
        padding: var(--space-3xl) 0;
    }
    
    .workflow-step {
        flex-direction: column;
        text-align: center;
        gap: var(--space-md);
        padding: var(--space-lg);
    }
    
    .workflow-number {
        position: static;
        margin-bottom: var(--space-sm);
    }
    
    .arch-layer {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
    
    .layer-label {
        min-width: auto;
    }
    
    .layer-items {
        justify-content: center;
    }
}

/* ============================================ */
/* Animations - Reveal */
/* ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.nav-link.active {
    color: var(--text-primary) !important;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}