docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영. - Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들 (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거. - Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/ Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/ Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이 존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존). - Dev의 W3Schools 언어 튜토리얼 폴더(Topic_C/CPP/CSS/CSharp/HOWTO/HTML/Java/ JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동. - 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리. - Topic_Programming 최종 문서 수: 2784 → 3985.
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+---
+id: w3css-intro
+title: "W3CSS Intro"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["W3.CSS Demo", "Kitchen Sink", "W3.CSS 소개"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.86
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["w3css", "css-framework", "w3schools", "intro"]
+raw_sources: ["https://www.w3schools.com/w3css/w3css_intro.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[W3CSS Intro]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+This "Kitchen Sink" intro page is deliberately a survey, not a tutorial — it flashes a tiny live sample of EVERY major W3.CSS feature (colors, containers, panels, cards, grid, flexbox, modals, tabs, animations, etc.) in one scroll, functioning as a visual table of contents that previews what each later chapter will teach in depth. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Purpose** — a single-page "kitchen sink" demo giving a bite-sized preview of nearly every W3.CSS component before diving into individual chapters. [S1]
+- **Core class families previewed** — `w3-container`, `w3-panel`, `w3-card`, `w3-table`, `w3-ul`, `w3-button`/`w3-btn`, `w3-tag`/`w3-badge`, `w3-grid`, `w3-flex`, `w3-row`, `w3-display-*`, `w3-modal`, `w3-dropdown`, `w3-bar` (navigation), `w3-animate-*`. [S1]
+- **w3-grid vs w3-flex distinction (previewed here, detailed later)** — grid is two-dimensional (rows AND columns); flex is one-dimensional (rows OR columns). [S1]
+
+## 📖 세부 내용 (Details)
+- Container example: `<div class="w3-container w3-teal"><h1>This is a Header</h1></div>`. [S1]
+- Panel example: `<div class="w3-panel w3-red"><p>I am a panel</p></div>`. [S1]
+- Card example: `<div class="w3-card-4"><img src="img_snowtops.jpg" alt="Alps"><div class="w3-container w3-center"><p>French Alps</p></div></div>`. [S1]
+- Grid example: `<div class="w3-grid"><div>1</div><div>2</div><div>3</div><div>4</div></div>`. [S1]
+- Flex example: `<div class="w3-flex" style="gap:8px"><div>1</div><div>2</div><div>3</div></div>`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 이 페이지 자체가 W3.CSS 전체 기능의 축소판 시연이며, 각 컴포넌트는 이후 챕터에서 상세히 다뤄진다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Grid vs flex, previewed side by side (HTML):
+```html
+<div class="w3-grid"> <!-- two-dimensional: rows AND columns -->
+  <div>1</div><div>2</div><div>3</div><div>4</div>
+</div>
+<div class="w3-flex" style="gap:8px"> <!-- one-dimensional: rows OR columns -->
+  <div>1</div><div>2</div><div>3</div>
+</div>
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.86
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[W3.CSS Tutorial]]
+- **관련 개념:** [[W3CSS Colors]], [[W3CSS Containers]], [[W3CSS Grid]], [[W3CSS Flexbox]]
+- **참조 맥락:** 전체 프레임워크의 축소 시연 — Colors 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — W3.CSS Demo (Kitchen Sink) — https://www.w3schools.com/w3css/w3css_intro.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Demo (Kitchen Sink)" page (Astra wiki-curation, P-Reinforce v3.1 format).