:root{--bg-primary: #010101;--bg-secondary: #0a0a0a;--bg-tertiary: #111111;--text-primary: #e8e3d5;--text-secondary: #999;--accent-teal: #a9ddd3;--accent-teal-dark: #8fcdbd;--accent-tan: #e8c48f;--accent-rose: #d39da9;--state-waiting: #4a4a4a;--state-active: #a9ddd3;--state-completed: #e8e3d5;--state-error: #d39da9;--glass-bg: rgba(10, 10, 10, .8);--glass-border: rgba(169, 221, 211, .3);--glass-shadow: 0 8px 32px rgba(0, 0, 0, .6);--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "SF Mono", "Monaco", "Inconsolata", monospace;--font-size-xs: 11px;--font-size-sm: 13px;--font-size-base: 14px;--font-size-md: 16px;--font-size-lg: 18px;--font-size-xl: 24px;--font-size-2xl: 32px;--font-size-3xl: 48px;--font-size-4xl: 64px;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--spacing-2xl: 48px;--spacing-3xl: 64px;--spacing-4xl: 96px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 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var(--glass-border);border-radius:var(--radius-xl)}.header{position:fixed;top:0;left:0;right:0;z-index:1000;padding:var(--spacing-md) 0;transition:all var(--transition-base)}.header.scrolled{background:var(--glass-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--glass-border)}.header-content{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:0 var(--spacing-lg)}.header-brand{display:flex;align-items:center;gap:var(--spacing-md)}.header-brand a{display:flex;align-items:center}.logo{height:32px;width:auto}.brand-divider{width:1px;height:24px;background:var(--glass-border)}.brand-name{font-size:var(--font-size-lg);font-weight:600;color:var(--text-primary)}.tutorial-name{font-size:var(--font-size-md);font-weight:500;color:var(--text-secondary)}.nav-links{display:flex;list-style:none;gap:var(--spacing-xl)}.nav-links a{color:var(--text-secondary);font-size:var(--font-size-sm);font-weight:500;transition:color var(--transition-fast)}.nav-links a:hover{color:var(--text-primary)}.nav-links a.back-link{display:flex;align-items:center;gap:var(--spacing-xs)}.nav-links a.back-link svg{width:16px;height:16px}.footer{padding:var(--spacing-2xl) 0;background:var(--bg-primary);border-top:1px solid rgba(169,221,211,.1)}.footer-content{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:0 var(--spacing-lg)}.footer-logo{height:24px;width:auto;opacity:.6;transition:opacity var(--transition-fast)}.footer-logo:hover{opacity:1}.footer-links{display:flex;gap:var(--spacing-xl);align-items:center}.footer-links a{color:var(--text-secondary);font-size:var(--font-size-sm);display:flex;align-items:center;gap:var(--spacing-xs);transition:color var(--transition-fast)}.footer-links a:hover{color:var(--text-primary)}.footer-links 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50%)}.tc-hero-content{max-width:800px;margin:0 auto;text-align:center}.tc-hero-badge{display:inline-flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-xs) var(--spacing-md);background:#a9ddd31a;border:1px solid rgba(169,221,211,.2);border-radius:var(--radius-2xl);font-size:var(--font-size-sm);font-weight:500;color:var(--accent-teal);margin-bottom:var(--spacing-xl);text-transform:uppercase;letter-spacing:1.5px}.status-dot{width:8px;height:8px;border-radius:50%;display:inline-block}.status-dot.synced{background:var(--accent-teal);box-shadow:0 0 8px #a9ddd399}.tc-hero h1{font-size:var(--font-size-4xl);margin-bottom:var(--spacing-xl);background:linear-gradient(135deg,var(--text-primary) 0%,var(--accent-teal) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.1}.tc-hero-tagline{font-size:var(--font-size-lg);color:var(--text-secondary);line-height:1.7;max-width:650px;margin:0 auto var(--spacing-md)}.tc-hero-subtitle{font-size:var(--font-size-base);color:var(--text-secondary);opacity:.7;max-width:600px;margin:0 auto var(--spacing-2xl)}.tc-hero-stats{display:flex;align-items:center;justify-content:center;gap:var(--spacing-xl);margin-bottom:var(--spacing-2xl)}.tc-stat{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-xs)}.tc-stat-value{font-size:var(--font-size-xl);font-weight:700;color:var(--accent-teal)}.tc-stat-label{font-size:var(--font-size-xs);color:var(--text-secondary);text-transform:uppercase;letter-spacing:1px}.tc-stat-divider{width:1px;height:32px;background:var(--glass-border)}.tc-hero-cta{display:flex;justify-content:center;gap:var(--spacing-md)}.tc-curriculum{background:var(--bg-secondary);padding:var(--spacing-3xl) 0 var(--spacing-4xl)}.tc-curriculum-header{text-align:center;margin-bottom:var(--spacing-3xl)}.tc-curriculum-header h2{margin-bottom:var(--spacing-sm);background:linear-gradient(135deg,var(--text-primary) 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var(--spacing-sm);border-radius:var(--radius-sm)}.tc-lesson-badge.available{background:#a9ddd326;color:var(--accent-teal);border:1px solid rgba(169,221,211,.3)}.tc-lesson-badge.coming-soon{background:#99999926;color:var(--text-secondary);border:1px solid rgba(153,153,153,.3)}.tc-lesson-body p{font-size:var(--font-size-base);color:var(--text-secondary);line-height:1.6;margin-bottom:var(--spacing-md)}.tc-lesson-footer{display:flex;align-items:center}.tc-lesson-action{display:flex;align-items:center;gap:var(--spacing-sm);color:var(--accent-teal);font-size:var(--font-size-sm);font-weight:500}.tc-lesson-action svg{width:16px;height:16px;transition:transform var(--transition-fast)}a.tc-lesson-card:hover .tc-lesson-action svg{transform:translate(4px)}.tc-lesson-coming{font-size:var(--font-size-sm);color:var(--text-secondary)}.tc-lesson-connector{display:flex;justify-content:center;padding:var(--spacing-md) 0}.tc-connector-line{width:2px;height:32px;background:linear-gradient(to 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