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: howto-css-equal-height
+title: "How To - Equal Height"
+category: "Web_Recipes"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["equal height columns CSS", "display table-cell columns"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.85
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["howto", "css", "w3schools", "layout", "flexbox"]
+raw_sources: ["https://www.w3schools.com/howto/howto_css_equal_height.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[HOWTO CSS Equal Height]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+The `display: table` / `display: table-cell` trick repurposes HTML TABLE layout behavior (where cells in the same row always match the row's tallest cell) onto plain `<div>`s WITHOUT using an actual `<table>` element — an old technique that pre-dates Flexbox, and the recipe explicitly shows Flexbox (`display: flex; flex: 1;`) as the modern equivalent with an explicit caveat: Flexbox isn't supported in IE10 and earlier, which is presumably why the table-display trick is taught FIRST despite being the more obscure approach. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`display: table` / `display: table-cell`** — makes a `<div>` container and its `<div>` children behave like a `<table>` and `<td>`s, inheriting the automatic row-height-matching behavior of real tables, without any table markup. [S1]
+- **Responsive stacking via media query** — `@media (max-width: 600px) { .col { display: block; width: 100%; } }` switches the table-cell columns to stacked blocks on narrow screens. [S1]
+- **Flexbox alternative** — `.col-container { display: flex; } .col { flex: 1; }` achieves the same equal-height effect with less code, but is unsupported in IE10 and earlier. [S1]
+
+## 📖 세부 내용 (Details)
+- Table-display method: `.col-container { display: table; width: 100%; } .col { display: table-cell; }`. [S1]
+- Flexbox method: `.col-container { display: flex; width: 100%; } .col { flex: 1; padding: 16px; }`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+없음 — 신규 레시피, 기존 문서와 모순되는 내용 없음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+서로 다른 텍스트 길이를 가진 3개 컬럼이 항상 가장 높은 컬럼에 맞춰 동일한 높이로 렌더링되는 예제가 원문에서 직접 제시됨. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Table-display trick vs. Flexbox for equal-height columns (CSS):
+```css
+/* Table-display trick -- works in older browsers */
+.col-container { display: table; width: 100%; }
+.col { display: table-cell; }
+
+/* Flexbox -- modern, not supported in IE10 and earlier */
+.col-container-flex { display: flex; width: 100%; }
+.col-flex { flex: 1; padding: 16px; }
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference)
+- **신뢰 점수:** 0.85
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[W3Schools HOW TO]]
+- **관련 개념:** [[HOWTO CSS Four Columns]], [[HOWTO CSS Clearfix]], [[HOWTO CSS Mixed Columns]]
+- **참조 맥락:** CSS Layout & Positioning 섹션.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — How To - Equal Height — https://www.w3schools.com/howto/howto_css_equal_height.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "How To - Equal Height" recipe (Astra wiki-curation, P-Reinforce v3.1 format).