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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id: css-flexbox-justify-content
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title: "CSS Flexbox Justify Content"
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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: ["justify-content", "flexbox main-axis alignment", "flex justify", "horizontal flex alignment", "space-between flexbox"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.89
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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", "flexbox", "justify-content"]
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raw_sources: ["https://www.w3schools.com/css/css3_flexbox_container_justify.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CSS Flexbox Justify Content]]
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## 🎯 한 줄 통찰 (One-line insight)
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The `justify-content` property aligns flex items along the main-axis (horizontally) within a flex container, offering values from simple edge/center alignment to several space-distribution modes. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **Main-axis alignment** — `justify-content` controls how flex items are positioned along the main-axis (horizontally) inside a flex container. [S1]
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- **Default is `flex-start`** — items align at the beginning of the container unless another value is set. [S1]
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- **Two families of values** — positional (`center`, `flex-start`, `flex-end`) and space-distribution (`space-around`, `space-between`, `space-evenly`). [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Apply on the container** — `justify-content` is always declared on the element with `display: flex`, not on the items. [S1]
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- **Space distribution choice** — pick `space-between` (no outer space), `space-around` (half-size outer space), or `space-evenly` (equal space everywhere) depending on the desired edge gaps. [S1]
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## 📖 세부 내용 (Details)
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The `justify-content` property aligns the flex items along the main-axis (horizontally) within a flex container. [S1]
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**`center`** — aligns the flex items in the center of the container. [S1]
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```css
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.flex-container {
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display: flex;
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justify-content: center;
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}
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```
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**`flex-start`** — aligns the flex items at the beginning of the container (this is default). [S1]
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```css
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.flex-container {
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display: flex;
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justify-content: flex-start;
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}
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```
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**`flex-end`** — aligns the flex items at the end of the container. [S1]
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```css
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.flex-container {
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display: flex;
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justify-content: flex-end;
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}
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```
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**`space-around`** — displays the flex items with space before, between, and after the lines. [S1]
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```css
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.flex-container {
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display: flex;
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justify-content: space-around;
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}
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```
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**`space-between`** — displays the flex items with space between the lines. [S1]
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```css
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.flex-container {
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display: flex;
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justify-content: space-between;
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}
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```
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**`space-evenly`** — displays the flex items with equal space around them. [S1]
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```css
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.flex-container {
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display: flex;
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justify-content: space-evenly;
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}
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```
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## 🛠️ 적용 사례 (Applied in summary)
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The page's own examples apply each value to a `.flex-container` declared with `display: flex`. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Align flex items on the main-axis (language: CSS):
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```css
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.flex-container {
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display: flex;
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justify-content: center; /* or flex-start | flex-end | space-around | space-between | space-evenly */
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}
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```
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## ⚖️ 비교 및 선택 기준 (Comparison & decision criteria)
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- **`space-between`** — no space before the first or after the last item; full gaps only between items. [S1]
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- **`space-around`** — space before, between, and after the lines (outer gaps are half the inner gaps). [S1]
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- **`space-evenly`** — equal space around every item, including the container edges. [S1]
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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:** 0.89
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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 Flexbox Align Items]], [[CSS Flex Items]], [[CSS Flexbox Responsive]]
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- **참조 맥락:** Referenced whenever positioning flex items horizontally along the main-axis of a flex container.
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## 📚 출처 (Sources)
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- [S1] W3Schools — CSS Flexbox Justify Content — https://www.w3schools.com/css/css3_flexbox_container_justify.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Flexbox Justify Content" page (Astra wiki-curation, P-Reinforce v3.1 format).
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