docs(10_Wiki): 위키 구조 정리 — 언어 튜토리얼 카테고리 폴더 제거 + 신규 자산 동기화

Topic_CSS/Topic_HTML/Topic_JavaScript/Topic_Prompt/Topic_Comfyui 등 기존 카테고리 폴더를 정리하고, Topic_Graphic/Dev 등 신규 산출물과 Topics 내부 세션/메모리 기록을 동기화.
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+---
+id: howto-css-fixed-menu
+title: "How To - Fixed Menu"
+category: "Web_Recipes"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["fixed navbar CSS", "sticky top menu"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.84
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["howto", "css", "w3schools", "layout", "position", "navigation"]
+raw_sources: ["https://www.w3schools.com/howto/howto_css_fixed_menu.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[HOWTO CSS Fixed Menu]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+The recipe explicitly warns that a fixed navbar OVERLAYS page content underneath it (since `position: fixed` removes the element from flow, other content doesn't "know" to leave room for it) — the fix is a manual `margin-top` on the main content equal to or greater than the navbar's height, meaning every fixed-menu layout requires the developer to keep two separate numbers (navbar height, content margin) in sync by hand, with no built-in mechanism linking them. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`position: fixed; top: 0;`** — pins the menu to the top of the VIEWPORT, staying visible during scroll. [S1]
+- **Overlay problem** — a fixed element doesn't push other content down; without compensation, the fixed menu covers the top of the page content. [S1]
+- **Manual `margin-top` fix** — the main content block needs `margin-top` at least equal to the navbar's rendered height to avoid being hidden underneath it. [S1]
+- **Bottom variant** — swapping `top: 0` for `bottom: 0` creates a fixed BOTTOM menu instead, with the equivalent fix being `margin-bottom` on the main content. [S1]
+
+## 📖 세부 내용 (Details)
+- Fixed top menu: `.navbar { position: fixed; top: 0; width: 100%; overflow: hidden; background-color: #333; } .navbar a { float: left; padding: 14px 16px; color: #f2f2f2; } .main { margin-top: 30px; }`. [S1]
+- Fixed bottom menu: `.navbar { position: fixed; bottom: 0; width: 100%; } .main { margin-bottom: 30px; }`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+없음 — 신규 레시피, 기존 문서와 모순되는 내용 없음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+Home/News/Contact 링크가 담긴 상단 고정 메뉴를 만들고, 콘텐츠가 가려지지 않도록 margin-top을 추가하는 예제가 원문에서 직접 제시됨. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Fixed top navbar requiring a manual content offset (CSS):
+```css
+.navbar {
+  position: fixed;
+  top: 0;
+  width: 100%;
+  background-color: #333;
+}
+.main {
+  margin-top: 30px; /* must match or exceed navbar height */
+}
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference)
+- **신뢰 점수:** 0.84
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[W3Schools HOW TO]]
+- **관련 개념:** [[HOWTO CSS Fixed Footer]], [[HOWTO CSS Fixed Sidebar]], [[HOWTO JS Navbar Sticky]]
+- **참조 맥락:** CSS Layout & Positioning 섹션.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — How To - Fixed Menu — https://www.w3schools.com/howto/howto_css_fixed_menu.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "How To - Fixed Menu" recipe (Astra wiki-curation, P-Reinforce v3.1 format).