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>
2026-07-11 11:05:56 +09:00
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+---
+id: w3css-images
+title: "W3CSS Images"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["w3-image", "grayscale sepia", "W3.CSS 이미지"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.89
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["w3css", "css-framework", "w3schools", "images"]
+raw_sources: ["https://www.w3schools.com/w3css/w3css_images.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[W3CSS Images]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+`w3-image` scales DOWN but never scales UP beyond the image's original size — a deliberate one-directional responsiveness distinct from `style="width:100%"` (which scales both up and down), meaning `w3-image` is the right choice specifically when you want a photo to shrink gracefully on small screens without ever appearing artificially blown-up/pixelated on large ones. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`w3-round` / `w3-circle` / `w3-border`** — reused shape/border classes apply directly to `<img>`. [S1]
+- **`w3-image`** — responsive: scales DOWN to fit container, never scales UP past original size. [S1]
+- **`style="width:100%"`** — scales both up AND down (fully fluid), unlike `w3-image`. [S1]
+- **`w3-opacity` / `w3-opacity-min` / `w3-opacity-max`** — three opacity intensity tiers. [S1]
+- **`w3-grayscale` / `w3-sepia`** (with `-min`/`-max` variants) — visual filter effects; NOT supported in IE11 and earlier. [S1]
+- **`w3-hover-opacity` / `w3-hover-grayscale` / `w3-hover-sepia`** — effects applied only on hover. [S1]
+- **`w3-hover-opacity-off`** — the inverse: an already-transparent image (`w3-opacity`) becomes FULLY opaque on hover, rather than the more common "transparent on hover" pattern. [S1]
+- **Photo album via Responsive Grid** — `w3-third` + `w3-card` + `<img style="width:100%">` + `w3-container` caption, repeated for a gallery layout. [S1]
+
+## 📖 세부 내용 (Details)
+- Never-scale-up responsive image: `<img src="img_lights.jpg" alt="Lights" class="w3-image">`. [S1]
+- Fully fluid (scales both ways): `<img src="img_lights.jpg" alt="Lights" style="width:100%">`. [S1]
+- Grayscale (not IE11-safe): `<img src="image.jpg" class="w3-grayscale">`. [S1]
+- Inverse hover effect: `<img src="snowtops.jpg" class="w3-opacity w3-hover-opacity-off" alt="Alps">` — starts transparent, becomes fully opaque on hover. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **grayscale/sepia의 브라우저 제약**: w3-grayscale과 w3-sepia 클래스 모두 IE11 이하에서 지원되지 않는다는 점이 각각 명시적으로 경고됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — Responsive Grid(w3-third)로 구성한 사진 앨범이 반응형 이미지 갤러리의 대표 실전 사례다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Image that fades in on hover, from transparent to fully opaque (HTML):
+```html
+<img src="snowtops.jpg" class="w3-opacity w3-hover-opacity-off" alt="Alps">
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.89
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[W3.CSS Tutorial]]
+- **관련 개념:** [[W3CSS Lists]], [[W3CSS Input]], [[W3CSS Effects]]
+- **참조 맥락:** 이미지 반응형/효과 — 입력 폼(Input) 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — W3.CSS Images — https://www.w3schools.com/w3css/w3css_images.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Images" page (Astra wiki-curation, P-Reinforce v3.1 format).