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-max-width-and-min-width
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title: "CSS Max-width and Min-width"
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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: ["max-width", "min-width", "max-height", "min-height", "responsive width"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.88
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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", "max-width", "min-width", "responsive"]
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raw_sources: ["https://www.w3schools.com/css/css_height_width_min_max.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CSS Max-width and Min-width]]
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## 🎯 한 줄 통찰 (One-line insight)
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`max-width` sets the maximum allowed width of an element, preventing it from growing larger than that value — and it overrides `width` when `width` is larger. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **Four constraint properties** — `min-width`/`max-width` control minimum and maximum width; `min-height`/`max-height` control minimum and maximum height. [S1]
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- **`max-width` definition** — sets the maximum allowed width of an element, preventing the element's width from being larger than the `max-width` value. [S1]
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- **Accepted `max-width` values** — a length (px, cm, etc.), a percentage (% of the containing block), or `none` (the default; no maximum). [S1]
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- **Override rule** — if both `width` and `max-width` are set on the same element and `width` is larger than `max-width`, the `max-width` value is used. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Responsive cap** — `max-width` prevents the scrollbars that appear when a fixed-`width` element is wider than a shrunken browser window. [S1]
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- **Fluid-with-cap** — pairing `width: 100%` with `max-width` makes a block fill its container up to a fixed ceiling. [S1]
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## 📖 세부 내용 (Details)
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**The properties**
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The tutorial covers four CSS properties for constraining element dimensions: [S1]
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- `min-width` and `max-width` — control minimum and maximum width
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- `min-height` and `max-height` — control minimum and maximum height
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**The `max-width` property**
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"The `max-width` property sets the maximum allowed width of an element. This prevents the width of an element to be larger than the `max-width` property value." [S1]
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It accepts three value types: a length (px, cm, etc.); a percentage (% of the containing block); or `none` (default; no maximum). [S1]
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**Why it matters for responsive design**
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`max-width` solves a responsive design problem: when the browser window shrinks below a fixed element width, scrollbars appear. Using `max-width` prevents this issue on smaller viewports. [S1]
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**Example 1** — comparing `width` vs `max-width`: [S1]
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```css
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.div1 {
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max-width: 500px;
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background-color: powderblue;
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}
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.div2 {
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width: 500px;
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background-color: powderblue;
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}
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```
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**Example 2** — combined `width` and `max-width`: [S1]
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```css
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.div1 {
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width: 100%;
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max-width: 900px;
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background-color: powderblue;
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}
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```
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**Important note**
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"If you use both the `width` property and the `max-width` property on the same element, and the value of the `width` property is larger than the `max-width` property; the `max-width` property value will be used!" [S1]
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**Related properties**
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The page lists six dimension properties with their descriptions: `height`, `max-height`, `max-width`, `min-height`, `min-width`, and `width`. [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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The two examples are the page's own applied cases: Example 1 contrasts a `max-width` box against a fixed-`width` box; Example 2 shows the fluid-with-cap pattern. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Fill the container up to a fixed ceiling (language: CSS):
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```css
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.div1 {
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width: 100%;
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max-width: 900px;
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background-color: powderblue;
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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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## ⚖️ 비교 및 선택 기준 (Comparison & decision criteria)
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- **`width`** — a fixed content width; can force horizontal scrollbars when the viewport is narrower than the value. [S1]
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- **`max-width`** — caps the width but lets the element shrink below it, so it adapts to smaller viewports without scrollbars; when both are set and `width` exceeds `max-width`, `max-width` wins. [S1]
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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:** 0.88
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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 Height and Width]], [[CSS Box Model]], [[CSS Padding and Box Sizing]]
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- **참조 맥락:** Referenced when constraining element size for responsive layouts.
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## 📚 출처 (Sources)
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- [S1] W3Schools — CSS Max-width and Min-width — https://www.w3schools.com/css/css_height_width_min_max.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Max-width and Min-width" page (Astra wiki-curation, P-Reinforce v3.1 format).
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