/* Kontext LoRA Online - Main Stylesheet */
/* Color Scheme: Deep Blue & Purple Gradient with Modern Accents */

:root {
    /* Primary Colors */
    --primary: #3b82f6;
    --primary-dark: #1e40af;
    --primary-light: #60a5fa;
    
    /* Secondary Colors */
    --secondary: #8b5cf6;
    --secondary-dark: #7c3aed;
    --secondary-light: #a855f7;
    
    /* Accent Colors */
    --accent: #06b6d4;
    --accent-light: #67e8f9;
    
    /* Neutral Colors */
    --background: #0f172a;
    --surface: #1e293b;
    --surface-light: #334155;
    --text: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Fira Code', 'Monaco', monospace;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--surface-light);
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text);
}

.logo {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: 8px;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--text);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    border: none;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    line-height: 1.5;
}

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

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

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

.btn-secondary:hover {
    background: var(--surface-light);
    transform: translateY(-1px);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    z-index: 1;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--text) 0%, var(--primary-light) 50%, var(--secondary-light) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.6;
}

/* Demo Container */
.demo-container {
    background: var(--surface);
    border-radius: 16px;
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--surface-light);
}

.demo-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    justify-content: center;
}

.tab-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    background: transparent;
    border: 1px solid var(--surface-light);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.tab-btn.active,
.tab-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.demo-iframe-container {
    display: none;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.demo-iframe-container.active {
    display: block;
}

.demo-iframe {
    width: 100%;
    height: 450px;
    border: none;
    border-radius: 12px;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

/* Sections */
.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--text) 0%, var(--primary-light) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Features Section */
.features {
    padding: var(--spacing-xxl) 0;
    background: var(--surface);
}

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

.feature-card {
    background: var(--background);
    border-radius: 16px;
    padding: var(--spacing-xl);
    border: 1px solid var(--surface-light);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.feature-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text);
}

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

/* Technology Section */
.technology {
    padding: var(--spacing-xxl) 0;
    background: var(--background);
}

.tech-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.tech-text h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text);
}

.tech-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.tech-text ul {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.tech-text li {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-md);
    position: relative;
}

.tech-text li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.tech-visual {
    text-align: center;
}

.tech-image {
    width: 100%;
    border-radius: 16px;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-lg);
}

.tech-stats {
    display: flex;
    justify-content: space-around;
    gap: var(--spacing-md);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Use Cases Section */
.use-cases {
    padding: var(--spacing-xxl) 0;
    background: var(--surface);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.case-card {
    background: var(--background);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--surface-light);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.case-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.case-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text);
    padding: 0 var(--spacing-lg);
}

.case-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

/* Tutorials Section */
.tutorials {
    padding: var(--spacing-xxl) 0;
    background: var(--background);
}

.tutorial-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.tutorial-steps {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

.step {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    text-align: left;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 900;
    color: white;
    flex-shrink: 0;
}

.step h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text);
}

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

.tutorial-cta {
    background: var(--surface);
    border-radius: 16px;
    padding: var(--spacing-xl);
    border: 1px solid var(--surface-light);
}

.tutorial-cta h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text);
}

.tutorial-cta p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.tutorial-cta .btn {
    margin: 0 var(--spacing-xs);
}

/* Community Section */
.community {
    padding: var(--spacing-xxl) 0;
    background: var(--surface);
}

.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.resource-card {
    background: var(--background);
    border-radius: 16px;
    padding: var(--spacing-xl);
    border: 1px solid var(--surface-light);
    transition: var(--transition);
}

.resource-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.resource-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text);
}

.resource-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.resource-link {
    color: var(--primary);
    font-weight: 600;
    transition: var(--transition);
}

.resource-link:hover {
    color: var(--primary-light);
}

/* Blog Preview Section */
.blog-preview {
    padding: var(--spacing-xxl) 0;
    background: var(--background);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.blog-card {
    background: var(--surface);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--surface-light);
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.blog-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.blog-content {
    padding: var(--spacing-lg);
}

.blog-content h3 {
    margin-bottom: var(--spacing-sm);
}

.blog-content h3 a {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    transition: var(--transition);
}

.blog-content h3 a:hover {
    color: var(--primary);
}

.blog-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.blog-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.blog-cta {
    text-align: center;
}

/* Footer */
.footer {
    background: var(--surface);
    border-top: 1px solid var(--surface-light);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

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

.footer-section h3,
.footer-section h4 {
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text);
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

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

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--text-secondary);
    transition: var(--transition);
}

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

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--primary);
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--surface-light);
    text-align: center;
    color: var(--text-muted);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .tech-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .tech-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .step {
        flex-direction: column;
        text-align: center;
    }
    
    .demo-iframe {
        height: 300px;
    }
    
    .tutorial-cta .btn {
        display: block;
        margin-bottom: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .demo-container {
        padding: var(--spacing-md);
    }
    
    .demo-iframe {
        height: 250px;
    }
    
    .feature-card,
    .case-card,
    .resource-card,
    .blog-card {
        margin: 0 -var(--spacing-xs);
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.case-card,
.resource-card,
.blog-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }