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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Antigravity Agent
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---
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id: css-transitions
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title: "CSS Transitions"
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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: ["transition", "CSS transition", "smooth transition", "hover transition", "transition shorthand"]
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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", "transition", "animation"]
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raw_sources: ["https://www.w3schools.com/css/css3_transitions.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CSS Transitions]]
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## 🎯 한 줄 통찰 (One-line insight)
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CSS transitions allow you to change property values smoothly, over a given duration, typically triggered by a state change such as `:hover`. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **Purpose** — CSS transitions allow you to change property values smoothly, over a given duration. [S1]
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- **Shorthand** — the `transition` property is a shorthand for `transition-property`, `transition-duration`, `transition-timing-function`, and `transition-delay`. [S1]
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- **Trigger required** — a transition runs when the targeted property changes value (for example, on `:hover`). [S1]
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- **Per-property durations** — multiple properties can each be given their own duration in a single comma-separated `transition` declaration. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Property + duration** — at minimum specify which property to transition and how long it takes: `transition: width 2s;`. [S1]
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- **State-change activation** — define the base rule, then change the property in a `:hover` (or similar) rule to drive the transition. [S1]
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- **Comma-separated multi-property** — list several `property duration` pairs separated by commas to transition them concurrently with different timings. [S1]
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## 📖 세부 내용 (Details)
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**The CSS `transition` Property**
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CSS transitions allows you to change property values smoothly, over a given duration. [S1]
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**CSS Transition Example**
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The following example shows a 100px * 100px `<div>` element. The `<div>` element has specified a transition effect for the width property, with a duration of 2 seconds: [S1]
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```css
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div {
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width: 100px;
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height: 100px;
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background-color: red;
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transition: width 2s;
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}
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```
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**How to Trigger the Transition**
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Now, we add a `div:hover` class that specifies a new value for the width property when a user mouses over the `<div>` element: [S1]
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```css
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div:hover {
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width: 300px;
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}
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```
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**Change Multiple Property Values**
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The following example adds a transition effect for the width, height, and background-color properties, with a duration of 2 seconds for the width, 4 seconds for the height, and 3 seconds for the background-color: [S1]
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```css
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div {
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transition: width 2s, height 4s, background-color 3s;
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}
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```
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**CSS Transition Properties**
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The following table lists the CSS transition properties: [S1]
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| Property | Description |
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|----------|-------------|
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| `transition` | A shorthand property for setting the four transition properties into a single property |
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| `transition-delay` | Specifies a delay (in seconds) for the transition effect |
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| `transition-duration` | Specifies how many seconds or milliseconds a transition effect takes to complete |
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| `transition-property` | Specifies the name of the CSS property the transition effect is for |
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| `transition-timing-function` | Specifies the speed curve of the transition effect |
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## 🛠️ 적용 사례 (Applied in summary)
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The page applies a transition to a `<div>` whose width grows from 100px to 300px over 2 seconds on hover, and a multi-property example transitioning width, height, and background-color with distinct durations. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Single-property transition triggered on hover (language: CSS):
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```css
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div {
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width: 100px;
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height: 100px;
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background-color: red;
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transition: width 2s;
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}
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div:hover {
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width: 300px;
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}
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```
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Multiple properties with different durations:
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```css
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div {
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transition: width 2s, height 4s, background-color 3s;
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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:** 0.89
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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 Transition Timing]], [[CSS Animations]], [[CSS 3D Transforms]]
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- **참조 맥락:** The entry point for smoothly animating property changes between two states; deeper control lives in the transition timing/delay properties.
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## 📚 출처 (Sources)
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- [S1] W3Schools — CSS Transitions — https://www.w3schools.com/css/css3_transitions.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Transitions" page (Astra wiki-curation, P-Reinforce v3.1 format).
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