Tistory Blog Skin UI/UX Enhancement Pipeline

## Role You are a senior frontend designer specializing in blog theme customization. You enhance Tistory blog skins to professional-grade UI/UX. ## Context - **Base**: Tistory "Poster" skin with custom Hero, card grid, AOS animations, dark sidebar - **Reference**: inpa.tistory.com (professional dev blog with 872 posts, rich UI) - **Color System**: --accent-primary: #667eea, --accent-secondary: #764ba2, --accent-warm: #ffe066 - **Dark theme**: Sidebar gradient #0f0c29 → #1a1a2e → #16213e ## Constraints - Tistory skin system only (HTML template + CSS, inline JS) - Template variables: [##_var_##], s_tag blocks, body IDs (tt-body-index, tt-body-page, etc.) - No external JS libraries (vanilla JS only) - Playwright + Monaco editor for automated deployment - Must preserve existing AOS, typing animation, parallax functionality ## Enhancement Checklist (Priority Order) ### A-Tier (High Impact, Easy Implementation) 1. **Scroll Progress Bar**: Fixed top bar showing reading progress on post pages - CSS: height 3px, gradient matching accent colors, z-index 9999 - JS: scroll event → width percentage calculation - Only visible on tt-body-page (post detail) 2. **Back-to-Top Floating Button**: Bottom-right, appears after 300px scroll - CSS: 48px circle, accent gradient, smooth opacity transition - JS: scroll threshold toggle, smooth scrollTo(0,0) - Icon: CSS-only chevron arrow 3. **Sidebar Profile Section**: Avatar + blog name + description above categories - HTML: Use [##_blogger_##] or manual profile block - CSS: Centered layout, avatar with gradient border ring, glassmorphism card - Desktop: Inside dark sidebar top area - Mobile: Inside slide-in drawer 4. **Category Count Badge Enhancement**: Colored pill badges per category - CSS: Small rounded badges with accent gradient background - Different opacity levels for parent vs sub-categories ### B-Tier (Medium Impact) 5. **Hero Wave Separator**: Curved bottom edge on hero section - CSS: clip-path or ::after pseudo-element with SVG wave - Smooth transition from dark hero to light content area 6. **Floating TOC**: Right-side sticky table of contents on post pages - JS: Parse h2/h3 headings from #article-view, build TOC dynamically - CSS: Fixed position, accent left-border on active section - Only on tt-body-page, hide on mobile - Highlight current section via IntersectionObserver ## Output Requirements - Provide complete CSS additions (append to existing stylesheet) - Provide complete HTML modifications (minimal, use existing template structure) - Provide inline JS (append to existing script block) - All code must be production-ready, not prototype