refactor(topics): 멀티 에이전트용 지식 재편 — _Common(공통 기본기) + Domain_* 구조

에이전트 8종(대화형/프로그래머 C·S/디자이너/설계자/기획자/QA/PD/PM)에게
[공통 기본 능력 + 롤별 Specialty] 2층으로 지식을 주입하기 위한 재분류.
문서 내용·포맷은 무수정, 폴더 이동만 (6,372개 문서 수 보존 확인).

- Topic_Programming → Domain_Programming (내부 구조 보존)
- Topic_Graphic → Domain_Design
- Topic_Business → Domain_Product
- Topic_General → Domain_General
- _Common 신설: Math(구 Topic_Math_Specialty), Reasoning(구 General/From_Thinking & Reasoning),
  Reasoning_Creativity(구 General/From_창의성), Communication(Poetic_Blog_Writing + From_writing)
- 타 도메인의 From_* 폴더는 유지 (출처 표기일 뿐, 이미 도메인에 맞게 분류된 문서)
- 빈 폴더 정리 (memory/procedures)
- 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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---
id: css-navigation-bar
title: "CSS Navigation Bar"
category: "Frontend"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["navbar", "navigation bar", "nav menu", "list of links", "site navigation"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.88
created_at: 2026-06-23
updated_at: 2026-06-23
review_reason: ""
merge_history: []
tags: ["css", "web", "frontend", "w3schools", "navbar", "navigation"]
raw_sources: ["https://www.w3schools.com/css/css_navbar.asp"]
applied_in: []
github_commit: ""
---
# [[CSS Navigation Bar]]
## 🎯 한 줄 통찰 (One-line insight)
A navigation bar is fundamentally a list of links built from `<ul>`/`<li>` elements, then stripped of its default bullets, margins, and padding so CSS can style it into a navbar. [S1]
## 🧠 핵심 개념 (Core concepts)
- **What it is** — a navigation bar is an important web-design component that helps users navigate between sections of a website. [S1]
- **Built from lists** — navbars are typically built with HTML list elements (`<ul>` and `<li>`) and then styled with CSS. [S1]
- **Placement** — navigation bars are typically located at the top or side of a webpage. [S1]
- **Navbar = list of links** — since a navbar is basically a list of links, `<ul>` and `<li>` are a natural fit. [S1]
## 🧩 추출된 패턴 (Extracted patterns)
- **Reset the list** — `list-style-type: none; margin: 0; padding: 0;` removes bullets and default browser spacing, giving a clean base for styling. [S1]
- **Shared base** — the same HTML+CSS base is reused for both vertical and horizontal navbars. [S1]
## 📖 세부 내용 (Details)
**Introduction** [S1]
A navigation bar is an important component of web design. Navigation bars help users navigate between different sections of a website. They are typically built with HTML list elements (`<ul>` and `<li>`), then styled with CSS. Navigation bars are typically located at the top or side of a webpage.
**Navigation Bar = List of Links** [S1]
A navigation bar is basically a list of links, so using the HTML `<ul>` and `<li>` elements makes perfect sense:
```html
<ul>
<li><a href="default.asp">Home</a></li>
<li><a href="news.asp">News</a></li>
<li><a href="contact.asp">Contact</a></li>
<li><a href="about.asp">About</a></li>
</ul>
```
Then strip the list of its default styling:
```css
ul {
list-style-type: none;
margin: 0;
padding: 0;
}
```
**Example explained** [S1]
- `list-style-type: none;` — Removes the bullet points from the list
- `margin: 0;` — Resets default browser margins
- `padding: 0;` — Resets default browser paddings
**Note** [S1]
The HTML and CSS code in the example above is the base code used for both vertical and horizontal navigation bars, which are covered in the next chapters.
## 🛠️ 적용 사례 (Applied in summary)
The page's applied example is the four-link `<ul>` (Home / News / Contact / About) reset with `list-style-type: none; margin: 0; padding: 0;` — the shared base for the vertical and horizontal navbar pages. No external project/commit applications found in the source.
## 💻 코드 패턴 (Code patterns)
Link list (language: HTML):
```html
<ul>
<li><a href="default.asp">Home</a></li>
<li><a href="news.asp">News</a></li>
<li><a href="contact.asp">Contact</a></li>
<li><a href="about.asp">About</a></li>
</ul>
```
List reset (language: CSS):
```css
ul {
list-style-type: none;
margin: 0;
padding: 0;
}
```
## ⚖️ 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:** 0.88
- **중복 검사 결과:** 신규 생성 (New discovery)
## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[CSS Tutorial]]
- **관련 개념:** [[CSS Vertical Navbar]], [[CSS Horizontal Navbar]], [[CSS Lists]], [[CSS Links]]
- **참조 맥락:** The base chapter referenced before building any vertical or horizontal navigation bar.
## 📚 출처 (Sources)
- [S1] W3Schools — CSS Navigation Bar — https://www.w3schools.com/css/css_navbar.asp
## 📝 변경 이력 (Change history)
- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Navigation Bar" page (Astra wiki-curation, P-Reinforce v3.1 format).