- Login/register now use CSS variables (--surface-*, --text-*, --accent)
- Dark/light theme toggle on auth pages (synced with localStorage)
- Unified nav menu: Главная, Инструменты, Возможности across all pages
- Consistent header style (backdrop blur, border)
- Sidebar: smaller icons (36px), reduced gaps, overflow scroll for nav area
- Dashboard header: fixed top bar with logo, nav links, user name, logout
- Expanded hero description with tool overview text
- Sidebar fits on all screen heights without overflow
- Nav background visible immediately (semi-transparent dark with blur)
- Added Инструменты and Возможности links in nav (hidden on mobile)
- Added id=features to advantages section for smooth scroll
- Replaced 0₽ with Free label on dashboard about section
- White background, card-style forms
- Fixed top header: logo, nav links (Главная, Инструменты, Возможности), login/register buttons
- Active state highlighting for current page
- Placeholders in inputs, password hint
- Mobile responsive (nav hidden on small screens)
- Red error styling matching light theme
- Group 13 tools into 4 color-coded categories (Images/Code/Web/Utils)
- Personalized greeting with user name from /auth/me
- About section with service description and stats (13 tools, 4 categories, free)
- Each category has icon, title, count badge, description
- Category-specific accent colors (blue/green/purple/yellow)
- Extract shared CSS (sidebar, theme vars, layout) into shared.css
- Extract shared JS (tailwind config, sidebar injection, theme toggle) into shared.js
- Remove ~1200 lines of duplicated code across 13 HTML pages
- Standardize all titles to format: Tool Name — WA Dev Tools
- Standardize page headers (h1 + description) across all tools
- Standardize container padding (tool-container class)
- Sidebar now injected via JS — single source of truth
- Use CSS variables for accent colors everywhere (no more hardcoded #0054e6)
