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

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --dark-gradient: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);
    --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --local-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --light-bg: #f8f9fa;
    --card-bg: #ffffff;
    --dark-card: #1a1f3a;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #ffffff;
    --border-color: #e2e8f0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
    --glow: 0 0 20px rgba(102, 126, 234, 0.3);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--dark-gradient);
    min-height: 100vh;
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(10, 14, 39, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    gap: 40px;
}

.nav-logo {
    flex-shrink: 0;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.nav-logo img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
    margin-left: auto;
    flex-shrink: 0;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    opacity: 0.9;
}

.nav-link:hover {
    opacity: 1;
    color: #667eea;
}

.nav-btn {
    padding: 10px 20px;
    background: var(--primary-gradient);
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

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

/* Hero Section */
.hero {
    text-align: center;
    padding: 80px 20px;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #ffffff 0%, #667eea 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary {
    padding: 16px 32px;
    background: var(--primary-gradient);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary {
    padding: 16px 32px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Local-First Highlight */
.local-highlight {
    text-align: center;
    padding: 40px 20px;
    background: rgba(17, 153, 142, 0.1);
    border: 2px solid rgba(17, 153, 142, 0.3);
    border-radius: 20px;
    margin: 60px auto;
    max-width: 800px;
}

.local-highlight-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #38ef7d;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

/* Demo Video Section */
.demo-video {
    padding: 80px 20px;
    background: rgba(0, 0, 0, 0.2);
}

.demo-video-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.demo-video-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #ffffff 0%, #667eea 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.demo-video-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    border: 2px solid rgba(102, 126, 234, 0.3);
    background: rgba(0, 0, 0, 0.3);
}

.demo-video-player {
    width: 100%;
    height: auto;
    display: block;
    background: #000;
}

@media (max-width: 768px) {
    .demo-video-title {
        font-size: 2rem;
    }
    
    .demo-video-subtitle {
        font-size: 1rem;
    }
}

/* Features Section */
.features {
    padding: 80px 20px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px 30px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: var(--glow);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-light);
}

.feature-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

/* AI Chat Preview */
.chat-preview {
    max-width: 800px;
    margin: 60px auto;
    padding: 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    min-height: 200px;
}

.chat-examples {
    position: relative;
    min-height: 180px;
}

.chat-example {
    position: absolute;
    width: 100%;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    pointer-events: none;
}

.chat-example.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    position: relative;
}

.chat-bubble {
    padding: 20px;
    margin-bottom: 15px;
    border-radius: 15px;
    max-width: 80%;
    animation: slideIn 0.5s ease;
}

.chat-user {
    background: var(--primary-gradient);
    margin-left: auto;
    text-align: right;
    animation-delay: 0.1s;
}

.chat-ai {
    background: rgba(255, 255, 255, 0.1);
    margin-right: auto;
    animation-delay: 0.3s;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.chat-indicators {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: #667eea;
    width: 24px;
    border-radius: 4px;
}

.indicator:hover {
    background: rgba(102, 126, 234, 0.6);
}

/* Tools Showcase */
.tools-showcase {
    padding: 80px 20px;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.section-subtitle {
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.2rem;
    margin-bottom: 50px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.tool-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 30px 20px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: var(--text-light);
}

.tool-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: var(--glow);
}

.tool-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.tool-name {
    font-size: 1.1rem;
    font-weight: 600;
}

.tool-category {
    margin-top: 60px;
}

.category-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--text-light);
}

/* CTA Section */
.cta-section {
    text-align: center;
    padding: 80px 20px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 30px;
    margin: 80px auto;
    max-width: 900px;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.cta-text {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
}

/* Footer */
.footer {
    padding: 60px 20px 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 100px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--text-light);
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: #667eea;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

.footer-support {
    margin-top: 15px;
    font-size: 0.9rem;
}

.footer-support a {
    color: #38ef7d;
    text-decoration: none;
    transition: all 0.3s ease;
}

.footer-support a:hover {
    color: #667eea;
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .nav-links {
        gap: 15px;
        font-size: 0.9rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}