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/
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  Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이
  존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존).
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  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-panels
title: "W3CSS Panels"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["w3-panel", "W3.CSS 패널"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.9
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["w3css", "css-framework", "w3schools", "panels"]
raw_sources: ["https://www.w3schools.com/w3css/w3css_panels.asp"]
applied_in: []
github_commit: ""
---
# [[W3CSS Panels]]
## 🎯 한 줄 통찰 (One-line insight)
`w3-panel` is just `w3-container` plus 16px top/bottom margin — one small structural difference that makes it the base class for FOUR distinct UI patterns (notes, quotes, alerts, cards) purely by combining it with different color/style modifier classes, rather than needing four separate component classes. [S1]
## 🧠 핵심 개념 (Core concepts)
- **`w3-panel`** — adds 16px top/bottom margin AND 16px left/right padding (container + vertical spacing). [S1]
- **Notes** — panel + pale color (e.g. `w3-pale-green`). [S1]
- **Quotes** — panel + `w3-leftbar w3-sand w3-xxlarge w3-serif`. [S1]
- **Alerts** — panel + strong/saturated color (e.g. plain `w3-red`). [S1]
- **Cards** — panel + `w3-card-4`. [S1]
- **Show/hide via inline `onclick`** — no JS file needed; `this.parentElement.style.display='none'` closes a panel; `document.getElementById(...).style.display='block'` reopens it. [S1]
## 📖 세부 내용 (Details)
- Basic panel: `<div class="w3-panel w3-red"><p>I am a panel.</p></div>`. [S1]
- Note styling: `<div class="w3-panel w3-pale-green"><p>...</p></div>`. [S1]
- Quote styling: `<div class="w3-panel w3-leftbar w3-sand w3-xxlarge w3-serif"><p><i>"Make it as simple as possible, but not simpler."</i></p></div>`. [S1]
- Hide a panel: `<span onclick="this.parentElement.style.display='none'" class="w3-button w3-display-topright">X</span>`. [S1]
- Show a hidden panel: `<button onclick="document.getElementById('id01').style.display='block'">Show panel</button>`. [S1]
## ⚖️ 모순 및 업데이트 (Contradictions & updates)
소스에서 모순되는 정보는 발견되지 않음.
## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 하나의 w3-panel 기반 클래스로 노트/인용문/알림/카드 4가지 UI 패턴을 구현하는 것이 클래스 조합 설계의 대표 사례다. [S1]
## 💻 코드 패턴 (Code patterns)
Dismissible panel using inline onclick, no JS file needed (HTML):
```html
<div class="w3-panel w3-display-container">
<span onclick="this.parentElement.style.display='none'"
class="w3-button w3-display-topright">X</span>
<p>Click on the X to close this panel.</p>
</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:** 0.90
- **중복 검사 결과:** 신규 생성 (New discovery)
## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[W3.CSS Tutorial]]
- **관련 개념:** [[W3CSS Containers]], [[W3CSS Notes]], [[W3CSS Quotes]], [[W3CSS Alerts]], [[W3CSS Cards]]
- **참조 맥락:** 노트/인용문/알림/카드의 공통 기반 — 테두리(Borders) 챕터로 이어짐.
## 📚 출처 (Sources)
- [S1] W3Schools — W3.CSS Panels — https://www.w3schools.com/w3css/w3css_panels.asp
## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Panels" page (Astra wiki-curation, P-Reinforce v3.1 format).