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

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

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

/* Header */
.header {
    background: #fff;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo h1 {
    color: #6366f1;
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #6366f1;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    overflow: hidden;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    color: #e0e7ff;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: #c7d2fe;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background: #fff;
    color: #6366f1;
}

.btn-primary:hover {
    background: #f8fafc;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border-color: #fff;
}

.btn-secondary:hover {
    background: #fff;
    color: #6366f1;
}

/* Phone Mockup */
.phone-mockup {
    position: relative;
    width: 300px;
    height: 600px;
    background: #1f2937;
    border-radius: 30px;
    padding: 20px;
    margin: 0 auto;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
}

.app-interface {
    padding: 20px;
    height: 100%;
}

.app-header {
    text-align: center;
    font-weight: 700;
    font-size: 1.2rem;
    color: #6366f1;
    margin-bottom: 30px;
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.feature-item {
    background: #f3f4f6;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    font-weight: 600;
    color: #374151;
}

/* Sections */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1f2937;
}

.features {
    padding: 80px 0;
    background: #f8fafc;
}

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

.feature-card {
    background: #fff;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

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

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* AI Models Section */
.ai-models {
    padding: 80px 0;
    background: #fff;
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.model-card {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    border: 2px solid #e5e7eb;
    transition: all 0.3s ease;
}

.model-card:hover {
    border-color: #6366f1;
    transform: translateY(-2px);
}

.model-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #6366f1;
    margin-bottom: 1rem;
}

.model-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* Pricing Section */
.pricing {
    padding: 80px 0;
    background: #f8fafc;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.pricing-card {
    background: #fff;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    position: relative;
    border: 2px solid #e5e7eb;
}

.pricing-card.featured {
    border-color: #6366f1;
    transform: scale(1.05);
}

.badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: #6366f1;
    color: #fff;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: #6366f1;
    margin-bottom: 2rem;
}

.price span {
    font-size: 1rem;
    color: #6b7280;
}

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

.features-list li {
    padding: 0.5rem 0;
    color: #6b7280;
    border-bottom: 1px solid #e5e7eb;
}

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

.btn-outline {
    background: transparent;
    color: #6366f1;
    border-color: #6366f1;
}

.btn-outline:hover {
    background: #6366f1;
    color: #fff;
}

/* Download Section */
.download {
    padding: 80px 0;
    background: #1f2937;
    color: #fff;
    text-align: center;
}

.download .section-title {
    color: #fff;
}

.download-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #d1d5db;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.download-btn img {
    height: 60px;
    transition: transform 0.3s ease;
}

.download-btn:hover img {
    transform: scale(1.05);
}

/* Footer */
.footer {
    background: #111827;
    color: #d1d5db;
    padding: 3rem 0 1rem;
}

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

.footer-section h3,
.footer-section h4 {
    color: #fff;
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

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

.footer-section a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #6366f1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #374151;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .models-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
}

/* Page-specific styles */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.page-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 80px 20px;
    line-height: 1.8;
}

.page-content h2 {
    color: #1f2937;
    margin: 2rem 0 1rem;
    font-size: 1.8rem;
}

.page-content h3 {
    color: #374151;
    margin: 1.5rem 0 0.5rem;
    font-size: 1.3rem;
}

.page-content p {
    margin-bottom: 1rem;
    color: #6b7280;
}

.page-content ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.page-content li {
    margin-bottom: 0.5rem;
    color: #6b7280;
}

.faq-item {
    background: #f8fafc;
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    background: #e5e7eb;
    padding: 1rem 1.5rem;
    font-weight: 600;
    color: #1f2937;
    cursor: pointer;
    border: none;
    width: 100%;
    text-align: left;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background: #d1d5db;
}

.faq-answer {
    padding: 1rem 1.5rem;
    color: #6b7280;
    display: none;
}

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