/* ============================================
   Chiti.ai Landing Page Styles
   Modern, clean, professional design
   ============================================ */

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

:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --accent: #ec4899;
    --success: #10b981;
    --warning: #f59e0b;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    
    --border-color: #e2e8f0;
    --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);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --container-width: 1200px;
    --section-padding: 100px 0;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 20px 0;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 24px;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.2s;
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}

/* ============================================
   Buttons
   ============================================ */
.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.nav-links .btn-primary { 
    color: white; 
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-icon {
    font-size: 18px;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    padding: 180px 0 120px;
    overflow: hidden;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    margin-bottom: 24px;
}

.badge {
    display: inline-block;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 60px;
    justify-content: center;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    top: -250px;
    right: -100px;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    bottom: -200px;
    left: -100px;
    animation-delay: -5s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: var(--accent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

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

/* ============================================
   Products Section
   ============================================ */
.products-section {
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 32px;
}

.product-card {
    background: white;
    border-radius: 16px;
    padding: 40px;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.product-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.product-card.featured {
    border: 2px solid var(--primary);
    position: relative;
}

.product-card.featured::before {
    content: '⭐ Featured';
    position: absolute;
    top: -12px;
    left: 24px;
    background: var(--primary);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.product-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.product-icon {
    font-size: 48px;
}

.product-badge {
    padding: 6px 12px;
    background: var(--success);
    color: white;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.product-badge.coming-soon {
    background: var(--text-muted);
}

.product-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 16px;
}

.product-description {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.product-features {
    margin-bottom: 24px;
}

.feature-item {
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--bg-tertiary);
}

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

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    transition: gap 0.2s;
}

.product-link:hover {
    gap: 12px;
}

.product-link.disabled {
    color: var(--text-muted);
    cursor: not-allowed;
    border: none;
    background: none;
    padding: 0;
}

/* ============================================
   How It Works Section
   ============================================ */
.how-it-works {
    padding: var(--section-padding);
}

.steps-container {
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 32px;
    margin-bottom: 80px;
    position: relative;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 30px;
    top: 80px;
    bottom: -80px;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--border-color));
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    box-shadow: var(--shadow-lg);
}

.step-content {
    flex: 1;
}

.step-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
}

.step-description {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.step-visual {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}

.file-icon {
    font-size: 48px;
    text-align: center;
    margin-bottom: 16px;
}

.file-types {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.file-type {
    padding: 8px 16px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.chat-bubble {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    box-shadow: var(--shadow-sm);
}

.chat-bubble p {
    color: var(--text-secondary);
    font-style: italic;
}

.ai-questions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.question {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text-secondary);
}

.document-preview {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 16px;
}

.doc-header {
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary);
}

.doc-lines {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    margin-bottom: 8px;
}

.doc-lines.short {
    width: 60%;
}

.export-buttons {
    display: flex;
    gap: 12px;
}

.export-btn {
    flex: 1;
    padding: 12px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.export-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.template-example {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

.template-header {
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary);
    color: var(--text-primary);
}

.template-line {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 14px;
    font-family: 'Courier New', monospace;
}

.filled-line {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    transition: all 0.3s;
}

.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   Use Cases Section
   ============================================ */
.use-cases {
    padding: var(--section-padding);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.use-case {
    text-align: center;
    padding: 32px;
}

.use-case-icon {
    font-size: 64px;
    margin-bottom: 16px;
}

.use-case h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

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

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    position: relative;
    padding: 120px 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    overflow: hidden;
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
}

.cta-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-subtitle {
    font-size: 20px;
    margin-bottom: 32px;
    opacity: 0.9;
}

.cta-section .btn-primary {
    background: white;
    color: var(--primary);
}

.cta-section .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.cta-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.orb-4 {
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.1);
    top: -200px;
    right: -100px;
}

.orb-5 {
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    bottom: -150px;
    left: -50px;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand .logo-text {
    color: white;
    background: none;
    -webkit-text-fill-color: white;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 14px;
}

.footer-column h4 {
    margin-bottom: 16px;
    font-size: 16px;
}

.footer-column a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: 12px;
    font-size: 14px;
    transition: color 0.2s;
}

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

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

.footer-bottom p {
    color: var(--text-muted);
    font-size: 14px;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .step {
        flex-direction: column;
    }
    
    .step:not(:last-child)::after {
        left: 30px;
        top: 80px;
    }
    
    .features-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .cta-title {
        font-size: 32px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 140px 0 80px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .product-card {
        padding: 24px;
    }
}