diff --git a/README.md b/README.md
index fdb4ea4..e69de29 100644
--- a/README.md
+++ b/README.md
@@ -1,63 +0,0 @@
-# YAMD
-
-Indentation-based markup language that compiles to HTML via Ruby codegen.
-
-## Syntax
-
-Structure is defined by indentation (tabs). Lines at a given indent level belong to the enclosing directive.
-
-### Directives (line-start only)
-
-| Syntax | Description |
-|--------|-------------|
-| `#% <ruby code>` | Metadata / Ruby statement. e.g. `#% meta "date", "2025 01 01"` |
-| `#! <expr>` | Block wrapper. Evaluates `expr` as a Ruby method call, content is passed as a block. e.g. `#! tag('h1')` |
-| `#$ <expr>` | Raw block. Like `#!` but inner lines are passed as a raw string (no YAMD parsing). Used for code blocks. e.g. `#$ code` |
-| `#. ` | List item. Must appear inside a `#! list(...)` block |
-
-### Inline constructs
-
-| Syntax | Description |
-|--------|-------------|
-| `` #`...` `` | Inline code |
-| `#{expr}` | Ruby expression interpolation (result converted to string) |
-| `#(expr)` | Inline math (AsciiMath, rendered to MathML) |
-| `#name(args)` | Method call. e.g. `#link("url")` |
-| `#name(args)#{ content }#` | Method call with content block. e.g. `#link("url")#{ click here }#` |
-| `##` | Escaped literal `#` |
-| `}#` | Closes a `#{` content block |
-
-### Comments
-
-Lines matching `#` followed by nothing or a space (i.e. `#` or `# ...`) are comments and are skipped.
-
-### Available renderer methods
-
-These are defined by `HTMLRenderer` in `exe/yamd`:
-
-| Method | Usage |
-|--------|-------|
-| `tag(name, **attrs)` | HTML element. `#! tag('h2')` |
-| `list(numbering)` | List. numbering: `"-"` (ul), `"1"`, `"a"`, `"A"`, `"i"`, `"I"` (ol). Dot-separated for nested: `"-.1"` |
-| `link(url)` | Anchor tag. `#link("https://example.com")#{ text }#` |
-| `code(lang: Lang::DEFAULT)` | Code block (used via `#$`). Optional `lang:` for highlighting rules |
-| `meta(name, value)` | HTML `<meta>` tag. Used via `#%` |
-| `inline_code(text)` | Inline `<code>`. Used via `` #`...` `` |
-| `inline_math(text)` | AsciiMath to MathML. Used via `#(...)` |
-
-### Example
-
-```
-#% meta "date", "2025 01 01"
-
-#! tag('h1')
-	Title
-
-Paragraph text with #`inline code` and #link("https://example.com")#{ a link }#.
-
-#! list('-')
-	#. First item
-	#. Second item with sub-content
-		#$ code
-			x = 1
-```
diff --git a/exe/yamd b/exe/yamd
index e160705..f43a35a 100755
--- a/exe/yamd
+++ b/exe/yamd
@@ -91,23 +91,6 @@ class HTMLRenderer < YAMD::Renderer
 		}
 	end
 
-	def single_tag(name, **attrs)
-		@buf << "<#{name}"
-		attrs.each { |k, v|
-			@buf << " "
-			if k.kind_of? Symbol
-				k = k.to_s
-			end
-			@buf << k
-			@buf << "=" << v.dump
-		}
-		@buf << "/>"
-	end
-
-	def meta(name, value)
-		single_tag('meta', name: name, content: value)
-	end
-
 	def tag(name, **attrs)
 		@buf << "<#{name}"
 		attrs.each { |k, v|
@@ -127,16 +110,16 @@ class HTMLRenderer < YAMD::Renderer
 		tag('a', href: to, &blk)
 	end
 
-	def code(lang: YAMD::Code::Lang::DEFAULT, &blk)
+	def code(&blk)
 		tag('pre', class: "language-any") {
 			tag('code', class: "language-any") {
-				@buf << YAMD::Code::highlight(blk.(), lang)
+				@buf << YAMD::Code::highlight(blk.())
 			}
 		}
 	end
 
 	def inline_code(text)
-		tag('code', class: "code-inline") {
+		tag('code') {
 			@buf << YAMD::Code::highlight(text)
 		}
 	end
diff --git a/lib/yamd/code.rb b/lib/yamd/code.rb
index ea7854f..73e666e 100644
--- a/lib/yamd/code.rb
+++ b/lib/yamd/code.rb
@@ -21,7 +21,7 @@ module YAMD::Code
 		DEFAULT = {
 			/\b(?:[A-Z][a-zA-Z\-_0-9]*)\b*/ => 'type',
 			/#(\s|$)[^\n]*/ => 'comment',
-			/\b(?:open|final|class|struct|enum|fn|let|var|if|else|while|loop|return|namespace|new)\b/ => 'kw',
+			/\b(?:open|final|class|fn|let|var|if|else|while|loop|return|namespace|new)\b/ => 'kw',
 			/\b(?:def|import|from)\b/ => 'kw',
 			/\b(?:null|undefined|true|false|this|self)\b/i => 'const',
 			/\b(?:__[a-zA-Z0-9_]+__)\b/i => 'const',
@@ -30,19 +30,6 @@ module YAMD::Code
 			/"(?:\\.|[^\\"])*"/ => 'str',
 			/'(?:\\.|[^\\'])*'/ => 'str',
 		}
-
-		GD_SCRIPT = {
-			/\b(?:[A-Z_]+[A-Z_0-9]*)\b/ => 'const',
-			/\b(?:[A-Z][a-zA-Z\-_0-9]*)\b*/ => 'type',
-			/#(\s|$)[^\n]*/ => 'comment',
-			/\b(?:class|struct|enum|var|func|const|if|else|while|return)\b/ => 'kw',
-			/\b(?:class_name|extends)\b/ => 'kw',
-			/\b(?:null|true|false|self)\b/i => 'const',
-			/[:,;()\[\]{}<>]/ => 'punct',
-			/0|(0x[0-9a-fA-F]+)|([1-9][0-9]*(\.[0-9]+)?)/ => 'number',
-			/"(?:\\.|[^\\"])*"/ => 'str',
-			/'(?:\\.|[^\\'])*'/ => 'str',
-		}
 	end
 
 	def self.highlight(txt, highlights=Lang::DEFAULT)