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: css-syntax
+title: "CSS Syntax"
+category: "Frontend"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["CSS rule", "CSS declaration", "selector and declaration block", "CSS property value", "CSS rule syntax"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.9
+created_at: 2026-06-23
+updated_at: 2026-06-23
+review_reason: ""
+merge_history: []
+tags: ["css", "web", "frontend", "w3schools", "syntax"]
+raw_sources: ["https://www.w3schools.com/css/css_syntax.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[CSS Syntax]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+A CSS rule is made of a selector that points to the HTML element to style and a declaration block containing one or more `property: value;` declarations, separated by semicolons and surrounded by curly braces. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **A CSS rule has two parts** — a selector and a declaration block. [S1]
+- **Selector** — points to the HTML element you want to style. [S1]
+- **Declaration block** — contains one or more declarations separated by semicolons. [S1]
+- **Declaration** — includes a CSS property name and a value, separated by a colon. [S1]
+- **Punctuation** — multiple CSS declarations are separated with semicolons, and declaration blocks are surrounded by curly braces. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **Rule pattern** — `selector { property: value; property: value; }`. [S1]
+- **Declaration pattern** — each declaration pairs a property and a value with a colon: `property: value;`. [S1]
+
+## 📖 세부 내용 (Details)
+A CSS rule consists of a **selector** and a **declaration block**. [S1]
+
+The selector points to the HTML element you want to style. The declaration block contains one or more declarations separated by semicolons. Each declaration includes a CSS property name and a value, separated by a colon. Multiple CSS declarations are separated with semicolons, and declaration blocks are surrounded by curly braces. [S1]
+
+**Example** [S1]
+```css
+p {
+  color: red;
+  text-align: center;
+}
+```
+
+In this example: [S1]
+- `p` is the selector (it targets HTML `<p>` paragraph elements).
+- `color` is a property, and `red` is its value.
+- `text-align` is a property, and `center` is its value.
+
+The rule above makes all paragraph text red and center-aligned. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+The `p` rule above is the page's own applied example: a complete rule styling paragraph elements with `color` and `text-align`. No external project/commit applications found in the source.
+
+## 💻 코드 패턴 (Code patterns)
+Basic CSS rule structure (language: CSS):
+```css
+selector {
+  property: value;
+  property: value;
+}
+```
+Concrete example:
+```css
+p {
+  color: red;
+  text-align: center;
+}
+```
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+No contradictions found in the source.
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.9
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[CSS Tutorial]]
+- **관련 개념:** [[CSS Introduction]], [[CSS Selectors]], [[CSS Add Internal]]
+- **참조 맥락:** The grammar underlying every CSS rule; referenced whenever writing or reading any selector and declaration.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — CSS Syntax — https://www.w3schools.com/css/css_syntax.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Syntax" page (Astra wiki-curation, P-Reinforce v3.1 format).