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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Antigravity Agent
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---
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id: css-vertical-navbar
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title: "CSS Vertical Navbar"
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category: "Frontend"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["vertical navbar", "sidenav", "sidebar navigation", "vertical navigation bar", "full-height sidebar"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.87
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created_at: 2026-06-23
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updated_at: 2026-06-23
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review_reason: ""
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merge_history: []
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tags: ["css", "web", "frontend", "w3schools", "navbar", "navigation"]
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raw_sources: ["https://www.w3schools.com/css/css_navbar_vertical.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CSS Vertical Navbar]]
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## 🎯 한 줄 통찰 (One-line insight)
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A vertical navbar is built by making the link `<a>` elements `display: block` inside a fixed-width `<ul>`, then layering on hover, active, centered, and full-height fixed-sidebar variations. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **Block links** — setting `display: block` on `li a` makes the whole link area clickable and stacks links vertically. [S1]
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- **Fixed width** — the `<ul>` is given an explicit `width` (e.g. `200px`). [S1]
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- **Hover state** — `li a:hover` changes link background and text color. [S1]
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- **Active state** — an `.active` class highlights the current link. [S1]
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- **Full-height sidebar** — `height: 100%` + `position: fixed` makes the navbar a sticky, scrollable sidebar. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Block-link vertical stack** — fixed-width `ul` + `display: block` links is the core vertical pattern. [S1]
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- **Centered bordered list** — `text-align: center` with `border-bottom` per `li` and `li:last-child { border-bottom: none; }` removes the trailing divider. [S1]
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- **Fixed full-height sidenav** — `position: fixed; height: 100%; overflow: auto;` for a scrollable sidebar. [S1]
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## 📖 세부 내용 (Details)
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**Basic vertical navbar with hover** [S1]
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```css
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ul {
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list-style-type: none;
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margin: 0;
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padding: 0;
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width: 200px;
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background-color: #f1f1f1;
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}
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li a {
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display: block;
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color: black;
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padding: 8px 16px;
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text-decoration: none;
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}
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/* Change the link and background color on hover */
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li a:hover {
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background-color: #555555;
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color: white;
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}
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```
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**Active link** [S1]
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Add an `active` class to highlight the current link:
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```css
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.active {
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background-color: #04AA6D;
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color: white;
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}
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```
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**Centered links with borders** [S1]
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```css
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ul {
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border: 1px solid #555555;
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}
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li {
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text-align: center;
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border-bottom: 1px solid #555555;
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}
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li:last-child {
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border-bottom: none;
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}
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```
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**Full-height fixed sidebar** [S1]
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```css
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ul {
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list-style-type: none;
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margin: 0;
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padding: 0;
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width: 130px;
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background-color: #f1f1f1;
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height: 100%; /* Full height */
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position: fixed; /* Make it stick, even on scroll */
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overflow: auto; /* Enable scrolling if the sidenav has too much content */
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}
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```
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**Note** [S1]
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The fixed sidebar example might not work properly on mobile devices.
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## 🛠️ 적용 사례 (Applied in summary)
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The page's applied examples are the gray hover navbar, the green `.active` highlight, the centered bordered list with no trailing divider, and the fixed full-height scrollable sidebar. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Block-link vertical navbar (language: CSS):
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```css
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li a {
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display: block;
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color: black;
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padding: 8px 16px;
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text-decoration: none;
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}
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li a:hover {
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background-color: #555555;
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color: white;
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}
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```
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Fixed full-height sidebar (language: CSS):
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```css
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ul {
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width: 130px;
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height: 100%;
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position: fixed;
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overflow: auto;
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}
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```
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source.
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.87
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[CSS Tutorial]]
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- **관련 개념:** [[CSS Navigation Bar]], [[CSS Horizontal Navbar]], [[CSS Position]]
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- **참조 맥락:** Referenced when building a sidebar or vertically stacked navigation menu.
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## 📚 출처 (Sources)
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- [S1] W3Schools — CSS Vertical Navbar — https://www.w3schools.com/css/css_navbar_vertical.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Vertical Navbar" page (Astra wiki-curation, P-Reinforce v3.1 format).
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