docs(10_Wiki): Topic_Business/General/Graphic/Programming을 Topics/ 하위로 이동

최상위 10_Wiki/Topic_*였던 4개 카테고리 폴더를 10_Wiki/Topics/Topic_* 로 재배치. 콘텐츠 변경 없음(순수 폴더 이동) — Topics/ 하위 나머지 폴더는 이미 지난 커밋에서 전부 정리된 상태(잔존 항목은 에이전트 운영 상태 및 사용자가 보존을 요청한 업데이트0615/무제 3.canvas 뿐).
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+---
+id: w3css-text
+title: "W3CSS Text"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["text-shadow", "w3-opacity", "W3.CSS 텍스트 스타일"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.88
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["w3css", "css-framework", "w3schools", "text"]
+raw_sources: ["https://www.w3schools.com/w3css/w3css_text.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[W3CSS Text]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+`w3-opacity` is explicitly "designed to work with all colors" as a class, while `text-shadow` requires inline `style` attributes and doesn't have a dedicated W3.CSS class — meaning opacity effects are first-class framework citizens while shadow effects lean on raw CSS3, a distinction with a practical consequence: text-shadow doesn't work in IE9 and earlier, but nothing in the source suggests w3-opacity shares that limitation. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`w3-left-align` / `w3-right-align`** — text alignment classes. [S1]
+- **`w3-center`** — centers block-level content (not just text). [S1]
+- **`w3-wide`** — applies wider letter-spacing. [S1]
+- **`w3-opacity`** — reduces text opacity, works with any color. [S1]
+- **Text shadow — CSS3, not a W3.CSS class** — applied via inline `style="text-shadow:1px 1px 0 #444"`; NOT supported in IE9 and earlier. [S1]
+- **Composability** — opacity, shadow, bold, and color classes can all stack on one element simultaneously. [S1]
+
+## 📖 세부 내용 (Details)
+- Alignment: `<div class="w3-left-align"><p>Left aligned text.</p></div>` / `<div class="w3-right-align">...</div>`. [S1]
+- Centering: `<div class="w3-container w3-center"><h2>Centered Content</h2><img ...><p>Some centered text.</p></div>`. [S1]
+- Opacity: `<h2 class="w3-opacity">Text Opacity</h2>`. [S1]
+- Shadow (inline style, no dedicated class): `<h2 class="w3-blue" style="text-shadow:1px 1px 0 #444">Text Shadow</h2>`. [S1]
+- Stacked effects: `<h1 class="w3-text-yellow" style="text-shadow:1px 1px 0 #444"><b>Yellow Text + Shadow + Bold</b></h1>`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **text-shadow의 브라우저 제약**: IE9 이하에서는 text-shadow가 동작하지 않는다는 점이 명시적으로 경고됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 투명도+그림자+굵게를 조합한 특수 텍스트 효과가 실전 활용의 대표 사례다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Combining opacity, color, shadow, and bold on one heading (HTML):
+```html
+<div class="w3-panel w3-blue">
+  <h1 class="w3-text-orange" style="text-shadow:1px 1px 0 #444">
+    <b>Orange Text + Shadow + Bold</b>
+  </h1>
+</div>
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.88
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[W3.CSS Tutorial]]
+- **관련 개념:** [[W3CSS Fonts Google]], [[W3CSS Round]]
+- **참조 맥락:** 텍스트 시각 효과 — 둥근 모서리(Round) 챕터로 이어짐.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — W3.CSS Text — https://www.w3schools.com/w3css/w3css_text.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "W3.CSS Text" page (Astra wiki-curation, P-Reinforce v3.1 format).