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67 lines
3.2 KiB
Markdown
67 lines
3.2 KiB
Markdown
---
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id: w3css-margins
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title: "W3CSS Margins"
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category: "Programming_Language"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["w3-margin", "w3-section", "W3.CSS 마진"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.88
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created_at: 2026-07-04
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updated_at: 2026-07-04
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review_reason: ""
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merge_history: []
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tags: ["w3css", "css-framework", "w3schools", "margins"]
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raw_sources: ["https://www.w3schools.com/w3css/w3css_margins.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[W3CSS Margins]]
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## 🎯 한 줄 통찰 (One-line insight)
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`w3-section` exists specifically because many HTML elements have NO default top/bottom margin — the source demonstrates two colored blocks touching with zero gap between them until `w3-section` is added, showing this class solves a real visual problem (elements running together) rather than being purely decorative. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **`w3-margin`** — 16px margin on ALL sides. [S1]
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- **`w3-margin-{top,right,bottom,left}`** — 16px margin on one specific side. [S1]
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- **`w3-section`** — 16px TOP and BOTTOM margin, specifically to separate stacked elements that lack default spacing. [S1]
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## 📖 세부 내용 (Details)
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- All-sides margin: `<div class="w3-container w3-margin"><p>I have 16px margin on all sides.</p></div>`. [S1]
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- Directional margin: `<div class="w3-container w3-margin-top"><p>I have 16px margin on the top.</p></div>`. [S1]
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- Section separation: `<div class="w3-container w3-section w3-blue"><h1>I am Blue</h1></div> <div class="w3-container w3-section w3-green"><h1>I am Green</h1></div>` — without `w3-section`, the two blocks would touch with no gap. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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- **기본 마진이 없는 요소 문제**: 많은 HTML 요소에 기본 상하 마진이 없어 서로 붙어버리는 문제를 w3-section이 해결한다는 점이 시각적 비교로 증명됨. [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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현재 발견된 실제 적용 사례가 없습니다 — 연속된 컨테이너 블록들을 w3-section으로 구분하는 것이 레이아웃 분리의 대표 실전 사례다. [S1]
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## 💻 코드 패턴 (Code patterns)
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Separating stacked blocks with w3-section (HTML):
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```html
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<div class="w3-container w3-section w3-blue"><h1>I am Blue</h1></div>
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<div class="w3-container w3-section w3-green"><h1>I am Green</h1></div>
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```
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.88
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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:** [[W3.CSS Tutorial]]
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- **관련 개념:** [[W3CSS Padding]], [[W3CSS RTL]]
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- **참조 맥락:** 마진 시스템 — RTL(오른쪽에서 왼쪽) 레이아웃 챕터로 이어짐.
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## 📚 출처 (Sources)
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- [S1] W3Schools — W3.CSS Margins — https://www.w3schools.com/w3css/w3css_margins.asp
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## 📝 변경 이력 (Change history)
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- 2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Margins" page (Astra wiki-curation, P-Reinforce v3.1 format).
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