:root {
    /* Dark Theme Colors */
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1f2937;
    --bg-elevated: #374151;
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-primary: #6366f1;
    --accent-primary-dark: #4f46e5;
    --accent-secondary: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --border: #374151;
    --border-light: #4b5563;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Glassmorphism Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-sm) 0;
}

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

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

.logo svg {
    width: 32px;
    height: 32px;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
}

.theme-toggle:hover {
    background: var(--bg-elevated);
    transform: scale(1.05);
}

/* Hero Section */
.hero {
    padding: var(--spacing-2xl) 0;
    background: radial-gradient(ellipse at top, var(--bg-secondary), var(--bg-primary));
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><path fill="%236366f1" fill-opacity="0.05" d="M0 0h200v200H0z"/><path fill="%238b5cf6" fill-opacity="0.05" d="M100 0v200M0 100h200"/></svg>');
    pointer-events: none;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeInUp 0.8s ease;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.1s backwards;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

/* Buttons */
.btn {
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-elevated);
    transform: translateY(-2px);
}

/* Feature Cards */
.features {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all 0.3s;
    border: 1px solid var(--border);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

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

.feature-card ul {
    list-style: none;
    margin-top: var(--spacing-md);
}

.feature-card li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* Pricing Cards */
.pricing {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

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

.pricing-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    position: relative;
    transition: all 0.3s;
    border: 1px solid var(--border);
}

.pricing-card.featured {
    border: 2px solid var(--accent-primary);
    transform: scale(1.05);
    box-shadow: 0 20px 40px -12px rgba(99, 102, 241, 0.3);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    margin: var(--spacing-md) 0;
}

.price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.pricing-card ul {
    list-style: none;
    margin: var(--spacing-lg) 0;
}

.pricing-card li {
    padding: var(--spacing-xs) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
}

/* Dashboard Layout */
.dashboard-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: calc(100vh - 70px);
}

.sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: var(--spacing-lg);
    position: sticky;
    top: 70px;
    height: calc(100vh - 70px);
    overflow-y: auto;
}

.sidebar-section {
    margin-bottom: var(--spacing-lg);
}

.sidebar-section h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: var(--spacing-xs);
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all 0.3s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background: var(--bg-card);
    color: var(--accent-primary);
}

.sidebar-nav svg {
    width: 20px;
    height: 20px;
}

.usage-card {
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-lg);
    text-align: center;
}

.usage-count {
    font-size: 2rem;
    font-weight: 700;
    margin: var(--spacing-xs) 0;
}

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

/* Tool Container */
.tool-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.tool-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.tool-header h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
}

.upload-area.drag-over {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.05);
}

.upload-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-card);
    border-radius: 2px;
    overflow: hidden;
    margin-top: var(--spacing-md);
}

.progress-fill {
    width: 0%;
    height: 100%;
    background: var(--gradient-primary);
    transition: width 0.3s;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
}

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

.footer h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    margin-bottom: var(--spacing-xs);
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.paddle-disclosure {
    background: var(--bg-card);
    border-left: 3px solid var(--accent-primary);
    padding: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

/* Responsive */
@media (max-width: 768px) {
    .dashboard-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
        height: auto;
        display: none;
    }
    
    .sidebar-mobile-toggle {
        display: block;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .nav-links {
        display: none;
    }
}

@media (min-width: 769px) {
    .sidebar-mobile-toggle {
        display: none;
    }
}