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-bars
+title: "W3CSS Bars"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["w3-bar", "w3-bar-block", "w3-bar-item", "W3.CSS 바"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.87
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["w3css", "css-framework", "w3schools", "bars", "navigation"]
+raw_sources: ["https://www.w3schools.com/w3css/w3css_bars.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[W3CSS Bars]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+`w3-bar` (horizontal) and `w3-bar-block` (vertical) are the exact same conceptual container differing only in ONE class name — meaning every color, hover, button, and responsive technique demonstrated for a horizontal bar transfers identically to a vertical sidebar, so this single chapter is really the foundation for both the later Navigation Bars AND Sidebar chapters. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`w3-bar`** — horizontal container for bar items. **`w3-bar-block`** — vertical container, same item classes apply. [S1]
+- **`w3-bar-item`** — provides correct spacing/padding/positioning for each item inside a bar; works on any element (`div`, `a`, etc.). [S1]
+- **Color + hover-color composability** — any `w3-color` class sets the bar's base color, and any `w3-hover-color` class can be added per-item for a distinct hover color. [S1]
+- **`w3-button`** — turns bar items (especially `<a>` links) into clickable button-styled elements. [S1]
+- **`w3-mobile`** — makes bar items responsive (stack/adjust on small screens). [S1]
+- **`w3-right`** — right-aligns a specific bar item within the bar. [S1]
+
+## 📖 세부 내용 (Details)
+- Horizontal bar: `<div class="w3-bar w3-green"><div class="w3-bar-item">London</div><div class="w3-bar-item">Paris</div><div class="w3-bar-item">Tokyo</div></div>`. [S1]
+- Vertical bar (same items, one class swapped): `<div class="w3-bar-block w3-green">...</div>`. [S1]
+- Bar as navigation with buttons: `<div class="w3-bar w3-black"><a href="#" class="w3-bar-item w3-button">London</a>...</div>`. [S1]
+- Right-aligned last item: `<a href="#" class="w3-bar-item w3-button w3-right">Tokyo</a>` as the final child. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- 현재까지 발견된 모순 사항 없음 (No contradictions found in available sources).
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — w3-bar 하나의 클래스 교체(w3-bar-block)만으로 수평/수직 네비게이션을 모두 만드는 패턴이 다음 챕터들(Navigation, Sidebar)의 기반이 된다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+The same items in horizontal vs vertical bar — only the container class changes (HTML):
+```html
+<!-- Horizontal -->
+<div class="w3-bar w3-black">
+  <a href="#" class="w3-bar-item w3-button">Home</a>
+  <a href="#" class="w3-bar-item w3-button">Link 1</a>
+</div>
+
+<!-- Vertical: same items, w3-bar-block instead of w3-bar -->
+<div class="w3-bar-block w3-black">
+  <a href="#" class="w3-bar-item w3-button">Home</a>
+  <a href="#" class="w3-bar-item w3-button">Link 1</a>
+</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:** 0.87
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[W3.CSS Tutorial]]
+- **관련 개념:** [[W3CSS Effects]], [[W3CSS Dropdowns]], [[W3CSS Navigation]], [[W3CSS Sidebar]]
+- **참조 맥락:** Navigation Components 섹션 첫 항목이자 기초 — 드롭다운(Dropdowns) 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — W3.CSS Bars — https://www.w3schools.com/w3css/w3css_bars.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Bars" page (Astra wiki-curation, P-Reinforce v3.1 format).