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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>
112 lines
3.8 KiB
Markdown
112 lines
3.8 KiB
Markdown
---
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id: css-add-internal
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title: "CSS Add Internal"
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category: "Frontend"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["internal CSS", "internal style sheet", "style element", "embedded CSS", "head style block"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.89
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created_at: 2026-06-23
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updated_at: 2026-06-23
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review_reason: ""
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merge_history: []
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tags: ["css", "web", "frontend", "w3schools", "stylesheet"]
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raw_sources: ["https://www.w3schools.com/css/css_howto_internal.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CSS Add Internal]]
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## 🎯 한 줄 통찰 (One-line insight)
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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]
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## 🧠 핵심 개념 (Core concepts)
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- **When to use** — an internal style sheet may be used if one single HTML page has a unique style. [S1]
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- **Where it lives** — the internal style is defined inside the `<style>` element, placed within the `<head>` section of an HTML page. [S1]
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- **Scope** — the styles apply to that one page only. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Single-page styling** — embed page-specific rules in a `<style>` block in the head instead of an external file. [S1]
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- **Standard rules inside** — the `<style>` block contains the same `selector { property: value; }` rules as any stylesheet. [S1]
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## 📖 세부 내용 (Details)
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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]
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```html
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<!DOCTYPE html>
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<html>
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<head>
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<style>
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body {
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background-color: linen;
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}
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h1 {
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color: maroon;
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margin-left: 40px;
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}
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</style>
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</head>
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<body>
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<h1>This is a heading</h1>
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<p>This is a paragraph.</p>
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</body>
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</html>
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```
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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]
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## 🛠️ 적용 사례 (Applied in summary)
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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.
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## 💻 코드 패턴 (Code patterns)
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Internal style sheet in the head (language: HTML):
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```html
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<head>
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<style>
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body {
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background-color: linen;
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}
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h1 {
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color: maroon;
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margin-left: 40px;
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}
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</style>
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</head>
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```
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## ⚖️ 비교 및 선택 기준 (Comparison & decision criteria)
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| Method | Where defined | Best use |
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| --- | --- | --- |
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| External CSS | `<link>` to a `.css` file | Style an entire website from one file [S1] |
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| Internal CSS | `<style>` element in the head | A single HTML page with a unique style [S1] |
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| Inline CSS | `style` attribute on an element | A unique style for a single element [S1] |
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source.
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.89
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[CSS Tutorial]]
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- **관련 개념:** [[CSS Add External]], [[CSS Add Inline]], [[CSS Multiple Style Sheets]]
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- **참조 맥락:** Referenced when one page needs its own styles without an external file.
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## 📚 출처 (Sources)
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- [S1] W3Schools — CSS Add Internal — https://www.w3schools.com/css/css_howto_internal.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Add Internal" page (Astra wiki-curation, P-Reinforce v3.1 format).
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