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koriweb 9609c04755 docs(10_Wiki): W3Schools 위키화 — HTML/CSS/JavaScript(core)

W3Schools 튜토리얼을 P-Reinforce v3.1 포맷으로 위키화(영어 본문, 한/영 섹션 헤더).
- Topic_HTML: 59문서 (튜토리얼+예제, 레퍼런스/메타 제외)
- Topic_CSS: 190문서 (메인 + Advanced/Flexbox/Grid/RWD 전체)
- Topic_JavaScript: 120문서 (코어 언어; Temporal/DOM상세/BOM/WebAPI/AJAX/jQuery/Graphics 등은 후속)
각 폴더 00_INDEX.md(MOC) 포함. 코드 verbatim, 미확인분은 "Not found in source" 표기.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-06-23 19:21:18 +09:00

3.8 KiB

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title

CSS Add Internal

🎯 한 줄 통찰 (One-line insight)

An internal style sheet may be used when a single HTML page has a unique style; it is defined inside a <style> element placed within the page's <head> section. [S1]

🧠 핵심 개념 (Core concepts)

When to use — an internal style sheet may be used if one single HTML page has a unique style. [S1]
Where it lives — the internal style is defined inside the <style> element, placed within the <head> section of an HTML page. [S1]
Scope — the styles apply to that one page only. [S1]

🧩 추출된 패턴 (Extracted patterns)

Single-page styling — embed page-specific rules in a <style> block in the head instead of an external file. [S1]
Standard rules inside — the <style> block contains the same selector { property: value; } rules as any stylesheet. [S1]

📖 세부 내용 (Details)

An internal style sheet may be used if one single HTML page has a unique style. The internal style is defined inside the <style> element, inside the head section. [S1]

<!DOCTYPE html>
<html>
<head>
<style>
body {
  background-color: linen;
}

h1 {
  color: maroon;
  margin-left: 40px;
}
</style>
</head>
<body>

<h1>This is a heading</h1>
<p>This is a paragraph.</p>

</body>
</html>

In this example the body element gets a linen background color, and the h1 element is styled with maroon text and a 40-pixel left margin. [S1]

🛠️ 적용 사례 (Applied in summary)

The page's own example embeds a <style> block in the head to style body and h1 for one page. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Internal style sheet in the head (language: HTML):

<head>
<style>
body {
  background-color: linen;
}

h1 {
  color: maroon;
  margin-left: 40px;
}
</style>
</head>

⚖️ 비교 및 선택 기준 (Comparison & decision criteria)

Method	Where defined	Best use
External CSS	`<link>` to a `.css` file	Style an entire website from one file [S1]
Internal CSS	`<style>` element in the head	A single HTML page with a unique style [S1]
Inline CSS	`style` attribute on an element	A unique style for a single element [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

No contradictions found in the source.

✅ 검증 상태 및 신뢰도

상태: draft
검증 단계: conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
신뢰 점수: 0.89
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: CSS Tutorial
관련 개념: CSS Add External, CSS Add Inline, CSS Multiple Style Sheets
참조 맥락: Referenced when one page needs its own styles without an external file.

📚 출처 (Sources)

[S1] W3Schools — CSS Add Internal — https://www.w3schools.com/css/css_howto_internal.asp

📝 변경 이력 (Change history)

2026-06-23: Initial draft synthesized from the W3Schools "CSS Add Internal" page (Astra wiki-curation, P-Reinforce v3.1 format).

3.8 KiB Raw Blame History