Rendered from phase1/allowed.md

Phase 1 — Allowed

This file is the gauge for everything in phase1/. Do not use anything outside this list.

HTML tags allowed

Document structure

html
head
title
body
header

Content / controls

div
h1, h2, h3, h4, h5, h6
img
input
button

Not allowed

CSS (no <style>, no external stylesheets, no inline style)
JavaScript
Any other HTML tags (a, nav, ul, ol, p, form, label, span, etc.)

Attributes allowed (as needed)

On html: lang
On img: src, alt, width, height
On input: type, name, id, placeholder, value, min, checked, readonly
On button: type

Rules from `./rules.html` that apply here

#	Rule	How we use it in Phase 1
5	Know block vs inline	Observe default browser layout only (no CSS to change it)
13	Relative paths	Image URLs and opening sibling `.html` files from this folder
15	Meaningful `alt`	Every meaningful `img` has descriptive `alt`
16	Don't write “image of” in `alt`	Never start `alt` with “image of” / “picture of”
17	Keep `alt` concise	Prefer under 125 characters
18	Decorative images use `alt=""`	Only if an image adds no meaning
19	`alt` is primarily accessibility	Write `alt` for people first
32	Always set `lang` on `<html>`	Every page uses `<html lang="en">`

Rules from `./rules.html` that do not apply yet

1–4, 6–12, 14 — these need CSS features Phase 1 does not allow (or root-relative paths).