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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: #667eea;
}

.logo-icon {
    font-size: 1.8rem;
}

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

.nav-link {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.nav-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Buttons */
.btn-primary, .btn-primary-large {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    display: inline-block;
}

.btn-primary-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-primary:hover, .btn-primary-large:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary, .btn-secondary-large {
    background: transparent;
    color: #667eea;
    padding: 0.75rem 1.5rem;
    border: 2px solid #667eea;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    display: inline-block;
}

.btn-secondary-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-secondary:hover, .btn-secondary-large:hover {
    background: #667eea;
    color: white;
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: #2d3748;
}

#rotating-word {
    color: #667eea;
    display: inline-block;
    animation: fadeInOut 3s ease-in-out infinite;
}

@keyframes fadeInOut {
    0%, 10% {
        opacity: 1;
        transform: translateY(0);
    }
    90%, 100% {
        opacity: 0;
        transform: translateY(-10px);
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

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

.demo-interface {
    background: #1a1a1a;
    border-radius: 16px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    width: 100%;
    max-width: 800px;
    height: 520px;
    display: flex;
    flex-direction: column;
}

.demo-header {
    background: #2d2d2d;
    color: white;
    padding: 1rem 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #404040;
}

.demo-header-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.demo-header-indicator {
    width: 8px;
    height: 8px;
    background: #ff4757;
    border-radius: 50%;
    margin-right: 0.5rem;
}

.demo-content {
    display: flex;
    flex: 1;
    height: 100%;
}

.demo-sidebar {
    width: 250px;
    background: #1a1a1a;
    padding: 1.5rem 1rem;
    border-right: 1px solid #404040;
    display: flex;
    flex-direction: column;
}

.demo-nav-item {
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    background: transparent;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #a0a0a0;
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.demo-nav-item.active {
    background: #2d3748;
    color: white;
    border-color: #4a5568;
}

.demo-nav-item:hover:not(.active) {
    background: #2d2d2d;
    color: white;
}

.demo-nav-item.folder {
    font-weight: 600;
    color: #667eea;
}

.demo-add-button {
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: auto;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #667eea;
    font-size: 1.2rem;
    font-weight: bold;
}

.demo-add-button:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.demo-main {
    flex: 1;
    background: #1a1a1a;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.demo-search {
    width: 100%;
    background: #2d2d2d;
    border: 1px solid #404040;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: white;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    outline: none;
}

.demo-search::placeholder {
    color: #a0a0a0;
}

.demo-conversations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    flex: 1;
    overflow-y: auto;
    align-items: start;
    padding-bottom: 2rem;
    box-sizing: border-box;
}

.demo-conversation-card {
    background: #2d2d2d;
    border-radius: 12px;
    padding: 1.25rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid #404040;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    height: 175px !important;
    min-height: 175px !important;
    max-height: 175px !important;
    box-sizing: border-box;
}

.demo-conversation-card:hover {
    background: #3d3d3d;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.demo-conversation-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
}

.demo-conversation-star {
    color: #fbbf24;
    font-size: 1.1rem;
    margin-top: 0.25rem;
}

.demo-conversation-date {
    color: #a0a0a0;
    font-size: 0.8rem;
    white-space: nowrap;
}

.demo-conversation-title {
    color: white;
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.4;
    margin: 0.5rem 0;
    flex: 1;
}

.demo-conversation-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    gap: 0.5rem;
}

.demo-conversation-menu {
    color: #a0a0a0;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.demo-conversation-menu:hover {
    color: white;
    background: #404040;
}

.demo-conversation-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid #404040;
    border-radius: 4px;
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #667eea;
    font-size: 0.8rem;
}

.demo-conversation-checkbox:hover {
    border-color: #667eea;
}

.demo-conversation-checkbox.checked {
    background: #667eea;
    border-color: #667eea;
    color: white;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #2d3748;
}

.section-subtitle {
    font-size: 1.25rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 400px);
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
    justify-content: center;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #2d3748;
}

.feature-description {
    color: #666;
    line-height: 1.6;
}

.feature-bullet {
    display: flex;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.feature-bullet:last-child {
    margin-bottom: 0;
}

.coming-soon-badge {
    display: inline-block;
    background: linear-gradient(135deg, #ff8c42 0%, #ffa726 100%);
    color: white;
    font-size: 0.48rem;
    font-weight: 600;
    padding: 0.12rem 0.32rem;
    border-radius: 6px;
    margin-left: 0.32rem;
    text-transform: uppercase;
    letter-spacing: 0.24px;
    box-shadow: 0 1px 2px rgba(255, 140, 66, 0.3);
    line-height: 1;
}

.only-badge {
    display: inline-block;
    background: linear-gradient(135deg, #ff8c42 0%, #ffa726 100%);
    color: white;
    font-size: 0.48rem;
    font-weight: 600;
    padding: 0.12rem 0.32rem;
    border-radius: 6px;
    margin-right: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.24px;
    box-shadow: 0 1px 2px rgba(255, 140, 66, 0.3);
    line-height: 1;
    transform: rotate(-45deg);
    vertical-align: top;
    margin-top: -0.2rem;
}

/* FAQ Section */
.how-it-works {
    padding: 6rem 0;
    background: #ffffff;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
    background: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid #e0e0e0;
}

.faq-item {
    border-bottom: 1px solid #e0e0e0;
}

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

.faq-question {
    display: flex;
    align-items: center;
    padding: 1.5rem 2rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    background: #ffffff;
}

.faq-question:hover {
    background: #f8f9fa;
}

.faq-icon {
    width: 32px;
    height: 32px;
    background: #667eea;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 1.2rem;
    margin-right: 1rem;
    flex-shrink: 0;
}

.faq-question span {
    flex: 1;
    color: #333;
    font-size: 1.1rem;
    font-weight: 500;
}

.faq-chevron {
    color: #667eea;
    font-size: 1.2rem;
    font-weight: bold;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

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

.faq-answer {
    padding: 0 2rem 1.5rem 5rem;
    color: #666;
    line-height: 1.6;
    display: none;
    background: #ffffff;
}

.faq-answer.active {
    display: block;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #2d3748;
}

.step-description {
    color: #666;
    line-height: 1.6;
}

/* Pricing Section */
.pricing {
    padding: 6rem 0;
    background: #f8f9fa;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    border: 2px solid #f0f0f0;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card.featured {
    border-color: #667eea;
    transform: scale(1.05);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.2);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-header {
    margin-bottom: 2rem;
}

.pricing-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #2d3748;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
}

.price-currency {
    font-size: 1.5rem;
    color: #666;
}

.price-amount {
    font-size: 3rem;
    font-weight: 700;
    color: #667eea;
}

.price-period {
    font-size: 1rem;
    color: #666;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    padding: 0.5rem 0;
    color: #666;
    border-bottom: 1px solid #f0f0f0;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.btn-pricing {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
}

.btn-pricing:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

/* Testimonials Section */
.testimonials {
    padding: 6rem 0;
    background: #f8f9fa;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.testimonial-content {
    margin-bottom: 1.5rem;
}

.testimonial-text {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #333;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: #667eea;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.author-name {
    font-weight: 600;
    color: #2d3748;
}

.author-title {
    color: #666;
    font-size: 0.9rem;
}

/* CTA Section */
.cta {
    padding: 6rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

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

/* Footer */
.footer {
    background: #2d3748;
    color: white;
    padding: 4rem 0 2rem;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-description {
    color: #a0aec0;
    line-height: 1.6;
}

.footer-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #4a5568;
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright {
    color: #a0aec0;
}

.footer-legal {
    display: flex;
    gap: 2rem;
}

.footer-legal a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-legal a:hover {
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        max-width: none;
        justify-content: stretch;
    }
    
    .steps-container {
        grid-template-columns: 1fr;
    }
    
    .step-item {
        flex-direction: column;
        text-align: center;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cta-title {
        font-size: 2rem;
    }
}