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+# HTML Presentation Template
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+
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+Reference architecture for generating slide presentations. Every presentation follows this structure.
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+
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+## Base HTML Structure
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+
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+```html
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+<!DOCTYPE html>
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+<html lang="en">
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+ <head>
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+ <meta charset="UTF-8" />
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0" />
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+ <title>Presentation Title</title>
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+
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+ <!-- Fonts: async non-blocking load (media="print" onload trick) -->
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+ <link rel="preconnect" href="https://api.fontshare.com" />
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+ <link rel="preconnect" href="https://fonts.googleapis.com" crossorigin />
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+ <link rel="stylesheet"
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+ href="https://api.fontshare.com/v2/css?f[]=..."
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+ media="print"
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+ onload="this.media='all'" />
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+ <noscript>
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+ <link rel="stylesheet" href="https://api.fontshare.com/v2/css?f[]=..." />
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+ </noscript>
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+
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+ <style>
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+ /* ===========================================
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+ CSS CUSTOM PROPERTIES (THEME)
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+ Change these to change the whole look
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+ =========================================== */
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+ :root {
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+ /* Colors — from chosen style preset */
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+ --bg-primary: #0a0f1c;
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+ --bg-secondary: #111827;
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+ --text-primary: #ffffff;
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+ --text-secondary: #9ca3af;
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+ --accent: #00ffcc;
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+ --accent-glow: rgba(0, 255, 204, 0.3);
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+
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+ /* Typography — MUST use clamp() */
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+ --font-display: "Clash Display", sans-serif;
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+ --font-body: "Satoshi", sans-serif;
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+ --title-size: clamp(2rem, 6vw, 5rem);
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+ --subtitle-size: clamp(0.875rem, 2vw, 1.25rem);
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+ --body-size: clamp(0.75rem, 1.2vw, 1rem);
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+
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+ /* Spacing — MUST use clamp() */
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+ --slide-padding: clamp(1.5rem, 4vw, 4rem);
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+ --content-gap: clamp(1rem, 2vw, 2rem);
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+
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+ /* Animation */
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+ --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
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+ --duration-normal: 0.6s;
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+ }
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+
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+ /* ===========================================
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+ BASE STYLES
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+ =========================================== */
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+ * {
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+ margin: 0;
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+ padding: 0;
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+ box-sizing: border-box;
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+ }
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+
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+ /* --- PASTE viewport-base.css CONTENTS HERE --- */
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+
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+ /* ===========================================
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+ ANIMATIONS
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+ Trigger via .visible class (added by JS on scroll)
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+ =========================================== */
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+ .reveal {
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+ opacity: 0;
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+ transform: translateY(30px);
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+ transition:
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+ opacity var(--duration-normal) var(--ease-out-expo),
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+ transform var(--duration-normal) var(--ease-out-expo);
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+ }
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+
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+ .slide.visible .reveal {
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+ opacity: 1;
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+ transform: translateY(0);
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+ }
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+
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+ /* Stagger children for sequential reveal */
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+ .reveal:nth-child(1) {
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+ transition-delay: 0.1s;
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+ }
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+ .reveal:nth-child(2) {
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+ transition-delay: 0.2s;
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+ }
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+ .reveal:nth-child(3) {
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+ transition-delay: 0.3s;
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+ }
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+ .reveal:nth-child(4) {
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+ transition-delay: 0.4s;
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+ }
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+
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+ /* ... preset-specific styles ... */
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+ </style>
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+ </head>
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+ <body>
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+ <!-- Optional: Progress bar -->
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+ <div class="progress-bar"></div>
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+
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+ <!-- Optional: Navigation dots -->
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+ <nav class="nav-dots"><!-- Generated by JS --></nav>
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+
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+ <!-- Slides -->
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+ <section class="slide title-slide">
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+ <h1 class="reveal">Presentation Title</h1>
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+ <p class="reveal">Subtitle or author</p>
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+ </section>
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+
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+ <section class="slide">
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+ <div class="slide-content">
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+ <h2 class="reveal">Slide Title</h2>
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+ <p class="reveal">Content...</p>
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+ </div>
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+ </section>
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+
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+ <!-- More slides... -->
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+
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+ <script>
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+ /* ===========================================
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+ SLIDE PRESENTATION CONTROLLER
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+ =========================================== */
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+ class SlidePresentation {
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+ constructor() {
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+ this.slides = document.querySelectorAll(".slide");
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+ this.currentSlide = 0;
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+ this.setupIntersectionObserver();
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+ this.setupKeyboardNav();
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+ this.setupTouchNav();
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+ this.setupProgressBar();
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+ this.setupNavDots();
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+ }
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+
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+ setupIntersectionObserver() {
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+ // Add .visible class when slides enter viewport
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+ // Triggers CSS animations efficiently
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+ }
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+
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+ setupKeyboardNav() {
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+ // Arrow keys, Space, Page Up/Down
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+ }
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+
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+ setupTouchNav() {
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+ // Touch/swipe support for mobile
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+ }
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+
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+ setupProgressBar() {
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+ // Update progress bar on scroll
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+ }
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+
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+ setupNavDots() {
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+ // IMPORTANT: Always clear before building — if outerHTML was
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+ // captured while dots were rendered, re-opening the file would
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+ // append a duplicate set on top of the existing ones.
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+ this.navDotsContainer.innerHTML = "";
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+ // Generate and manage navigation dots
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+ }
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+ }
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+
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+ new SlidePresentation();
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+ </script>
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+ </body>
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+</html>
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+```
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+
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+## Required JavaScript Features
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+
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+Every presentation must include:
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+
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+1. **SlidePresentation Class** — Main controller with:
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+ - Keyboard navigation (arrows, space, page up/down)
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+ - Touch/swipe support
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+ - Mouse wheel navigation
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+ - Progress bar updates
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+ - Navigation dots
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+
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+2. **Intersection Observer** — For scroll-triggered animations:
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+ - Add `.visible` class when slides enter viewport
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+ - Trigger CSS transitions efficiently
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+
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+3. **Optional Enhancements** (match to chosen style):
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+ - Custom cursor with trail
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+ - Particle system background (canvas)
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+ - Parallax effects
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+ - 3D tilt on hover
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+ - Magnetic buttons
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+ - Counter animations
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+
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+4. **Inline Editing** (only if user opted in during Phase 1 — skip entirely if they said No):
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+ - Edit toggle button (hidden by default, revealed via hover hotzone or `E` key)
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+ - Auto-save to localStorage
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+ - Export/save file functionality
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+ - See "Inline Editing Implementation" section below
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+
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+## Inline Editing Implementation (Opt-In Only)
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+
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+**If the user chose "No" for inline editing in Phase 1, do NOT generate any edit-related HTML, CSS, or JS.**
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+
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+**Do NOT use CSS `~` sibling selector for hover-based show/hide.** The CSS-only approach (`edit-hotzone:hover ~ .edit-toggle`) fails because `pointer-events: none` on the toggle button breaks the hover chain: user hovers hotzone -> button becomes visible -> mouse moves toward button -> leaves hotzone -> button disappears before click.
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+
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+**Required approach: JS-based hover with 400ms delay timeout.**
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+
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+HTML:
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+
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+```html
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+<div class="edit-hotzone"></div>
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+<button class="edit-toggle" id="editToggle" title="Edit mode (E)">✏️</button>
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+```
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+
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+CSS (visibility controlled by JS classes only):
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+
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+```css
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+/* Do NOT use CSS ~ sibling selector for this!
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+ pointer-events: none breaks the hover chain.
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+ Must use JS with delay timeout. */
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+.edit-hotzone {
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+ position: fixed;
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+ top: 0;
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+ left: 0;
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+ width: 80px;
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+ height: 80px;
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+ z-index: 10000;
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+ cursor: pointer;
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+}
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+.edit-toggle {
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+ opacity: 0;
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+ pointer-events: none;
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+ transition: opacity 0.3s ease;
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+ z-index: 10001;
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+}
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+.edit-toggle.show,
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+.edit-toggle.active {
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+ opacity: 1;
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+ pointer-events: auto;
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+}
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+```
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+
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+JS (three interaction methods):
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+
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+```javascript
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+// 1. Click handler on the toggle button
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+document.getElementById("editToggle").addEventListener("click", () => {
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+ editor.toggleEditMode();
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+});
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+
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+// 2. Hotzone hover with 400ms grace period
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+const hotzone = document.querySelector(".edit-hotzone");
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+const editToggle = document.getElementById("editToggle");
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+let hideTimeout = null;
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+
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+hotzone.addEventListener("mouseenter", () => {
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+ clearTimeout(hideTimeout);
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+ editToggle.classList.add("show");
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+});
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+hotzone.addEventListener("mouseleave", () => {
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+ hideTimeout = setTimeout(() => {
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+ if (!editor.isActive) editToggle.classList.remove("show");
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+ }, 400);
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+});
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+editToggle.addEventListener("mouseenter", () => {
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+ clearTimeout(hideTimeout);
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+});
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+editToggle.addEventListener("mouseleave", () => {
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+ hideTimeout = setTimeout(() => {
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+ if (!editor.isActive) editToggle.classList.remove("show");
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+ }, 400);
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+});
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+
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+// 3. Hotzone direct click
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+hotzone.addEventListener("click", () => {
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+ editor.toggleEditMode();
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+});
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+
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+// 4. Keyboard shortcut (E key, skip when editing text)
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+document.addEventListener("keydown", (e) => {
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+ if (
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+ (e.key === "e" || e.key === "E") &&
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+ !e.target.getAttribute("contenteditable")
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+ ) {
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+ editor.toggleEditMode();
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+ }
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+});
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+```
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+
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+**CRITICAL: `exportFile()` must strip edit state before capturing outerHTML.**
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+
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+When the user presses Ctrl+S in edit mode, `document.documentElement.outerHTML` captures the live DOM —
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+including `body.edit-active`, `contenteditable="true"` on every text element, and `.active`/`.show` classes on
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+the toggle button and banner. Anyone opening the saved file sees dashed outlines, a checkmark button, and an
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+edit banner, as if permanently stuck in edit mode.
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+
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+Always implement `exportFile()` like this:
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+
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+```javascript
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+exportFile() {
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+ // Temporarily strip edit state so the saved file opens cleanly
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+ const editableEls = Array.from(document.querySelectorAll('[contenteditable]'));
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+ editableEls.forEach(el => el.removeAttribute('contenteditable'));
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+ document.body.classList.remove('edit-active');
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+
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+ // Also strip UI classes from toggle button and banner
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+ const editToggle = document.getElementById('editToggle');
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+ const editBanner = document.querySelector('.edit-banner');
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+ editToggle?.classList.remove('active', 'show');
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+ editBanner?.classList.remove('active', 'show');
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+
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+ const html = '<!DOCTYPE html>\n' + document.documentElement.outerHTML;
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+
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+ // Restore edit state so the user can keep editing
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+ document.body.classList.add('edit-active');
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+ editableEls.forEach(el => el.setAttribute('contenteditable', 'true'));
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+ editToggle?.classList.add('active');
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+ editBanner?.classList.add('active');
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+
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+ const blob = new Blob([html], { type: 'text/html' });
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+ const a = document.createElement('a');
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+ a.href = URL.createObjectURL(blob);
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+ a.download = 'presentation.html';
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+ a.click();
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+ URL.revokeObjectURL(a.href);
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+}
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+```
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+
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+## Image Pipeline (Skip If No Images)
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+
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+If user chose "No images" in Phase 1, skip this entirely. If images were provided, process them before generating HTML.
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+
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+**Dependency:** `pip install Pillow`
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+
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+### Image Processing
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+
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+```python
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+from PIL import Image, ImageDraw
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+
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+# Circular crop (for logos on modern/clean styles)
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+def crop_circle(input_path, output_path):
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+ img = Image.open(input_path).convert('RGBA')
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+ w, h = img.size
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+ size = min(w, h)
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+ left, top = (w - size) // 2, (h - size) // 2
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+ img = img.crop((left, top, left + size, top + size))
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+ mask = Image.new('L', (size, size), 0)
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+ ImageDraw.Draw(mask).ellipse([0, 0, size, size], fill=255)
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+ img.putalpha(mask)
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+ img.save(output_path, 'PNG')
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+
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+# Resize (for oversized images that inflate HTML)
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+def resize_max(input_path, output_path, max_dim=1200):
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+ img = Image.open(input_path)
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+ img.thumbnail((max_dim, max_dim), Image.LANCZOS)
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+ img.save(output_path, quality=85)
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+```
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+
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+| Situation | Operation |
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+| -------------------------------- | ----------------------------- |
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+| Square logo on rounded aesthetic | `crop_circle()` |
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+| Image > 1MB | `resize_max(max_dim=1200)` |
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+| Wrong aspect ratio | Manual crop with `img.crop()` |
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+
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+Save processed images with `_processed` suffix. Never overwrite originals.
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+
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+### Image Placement
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+
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+**Use direct file paths** (not base64) — presentations are viewed locally:
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+
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+```html
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+<img src="assets/logo_round.png" alt="Logo" class="slide-image logo" />
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+<img
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+ src="assets/screenshot.png"
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+ alt="Screenshot"
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+ class="slide-image screenshot"
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+/>
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+```
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+
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+```css
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+.slide-image {
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+ max-width: 100%;
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+ max-height: min(50vh, 400px);
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+ object-fit: contain;
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+ border-radius: 8px;
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+}
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+.slide-image.screenshot {
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+ border: 1px solid rgba(255, 255, 255, 0.1);
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+ border-radius: 12px;
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+ box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
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+}
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+.slide-image.logo {
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+ max-height: min(30vh, 200px);
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+}
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+```
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+
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+**Adapt border/shadow colors to match the chosen style's accent.** Never repeat the same image on multiple slides (except logos on title + closing).
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+
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+**Placement patterns:** Logo centered on title slide. Screenshots in two-column layouts with text. Full-bleed images as slide backgrounds with text overlay (use sparingly).
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+
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+---
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+
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+## Code Quality
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+
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+**Comments:** Every section needs clear comments explaining what it does and how to modify it.
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+
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+**Accessibility:**
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+
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+- Semantic HTML (`<section>`, `<nav>`, `<main>`)
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+- Keyboard navigation works fully
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+- ARIA labels where needed
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+- `prefers-reduced-motion` support (included in viewport-base.css)
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+
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+## File Structure
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+
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+Single presentations:
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+
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+```
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+presentation.html # Self-contained, all CSS/JS inline
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+assets/ # Images only, if any
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+```
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+
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+Multiple presentations in one project:
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+
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+```
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+[name].html
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+[name]-assets/
|
|
|
+```
|
MageByte-Zero