docs(10_Wiki): 위키 구조 정리 — 언어 튜토리얼 카테고리 폴더 제거 + 신규 자산 동기화

Topic_CSS/Topic_HTML/Topic_JavaScript/Topic_Prompt/Topic_Comfyui 등 기존 카테고리 폴더를 정리하고, Topic_Graphic/Dev 등 신규 산출물과 Topics 내부 세션/메모리 기록을 동기화.
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+---
+id: css-text-pseudo-elements
+title: "CSS Text Pseudo-elements"
+category: "Frontend"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["::first-line", "::first-letter", "text pseudo-elements", "drop cap", "first line styling"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.87
+created_at: 2026-06-23
+updated_at: 2026-06-23
+review_reason: ""
+merge_history: []
+tags: ["css", "web", "frontend", "w3schools", "pseudo-elements", "typography"]
+raw_sources: ["https://www.w3schools.com/css/css_pseudo_elements_text.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[CSS Text Pseudo-elements]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+The text pseudo-elements `::first-line` and `::first-letter` style just the opening line or opening letter of block-level text, and can be combined with classes and with each other. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`::first-line`** — styles the first line of text; can only be applied to block-level elements. [S1]
+- **`::first-letter`** — styles the first letter of text; can only be applied to block-level elements. [S1]
+- **Works with classes** — pseudo-elements can be combined with HTML classes (e.g. `p.intro::first-letter`). [S1]
+- **Combinable** — `::first-line` and `::first-letter` can both be applied to the same element. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **Drop-cap pattern** — `::first-letter` with an enlarged font size produces a drop-cap-style opening letter. [S1]
+- **Class-scoped pseudo-element** — `selector.class::first-letter` limits the effect to a specific subset of elements. [S1]
+- **Stacking pseudo-elements** — applying both `::first-letter` and `::first-line` to one selector layers two styles on the same paragraph. [S1]
+
+## 📖 세부 내용 (Details)
+**The `::first-line` pseudo-element** [S1]
+The `::first-line` pseudo-element is used to style the first line of text. It can only be applied to block-level elements.
+```css
+p::first-line {
+  color: red;
+  font-variant: small-caps;
+  font-size: 19px;
+}
+```
+
+**The `::first-letter` pseudo-element** [S1]
+The `::first-letter` pseudo-element is used to style the first letter of text. Like `::first-line`, it can only be applied to block-level elements.
+```css
+p::first-letter {
+  color: red;
+  font-size: xx-large;
+}
+```
+
+**Combining with a class** [S1]
+Pseudo-elements can be combined with HTML classes:
+```css
+p.intro::first-letter {
+  color: #ff0000;
+  font-size: 200%;
+}
+```
+
+**Multiple pseudo-elements on one selector** [S1]
+Several pseudo-elements can be combined:
+```css
+p::first-letter {
+  color: red;
+  font-size: xx-large;
+}
+
+p::first-line {
+  color: blue;
+  font-variant: small-caps;
+}
+```
+
+## 🛠️ 적용 사례 (Applied in summary)
+The page's applied examples are the red small-caps first line, the enlarged red first letter, the `.intro` class drop cap, and the stacked first-letter + first-line styling. No external project/commit applications found in the source.
+
+## 💻 코드 패턴 (Code patterns)
+First-line styling (language: CSS):
+```css
+p::first-line {
+  color: red;
+  font-variant: small-caps;
+  font-size: 19px;
+}
+```
+Drop-cap first letter (language: CSS):
+```css
+p::first-letter {
+  color: red;
+  font-size: xx-large;
+}
+```
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+No contradictions found in the source.
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.87
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[CSS Tutorial]]
+- **관련 개념:** [[CSS Pseudo-elements]], [[CSS Content Pseudo-elements]], [[CSS Text]]
+- **참조 맥락:** Referenced when styling the opening line or letter of paragraphs, e.g. drop caps.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — CSS Text Pseudo-elements — https://www.w3schools.com/css/css_pseudo_elements_text.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Text Pseudo-elements" page (Astra wiki-curation, P-Reinforce v3.1 format).