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-split-screen
+title: "How To - Split Screen 1/2"
+category: "Web_Recipes"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["50/50 split layout CSS"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.83
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["howto", "css", "w3schools", "layout", "position"]
+raw_sources: ["https://www.w3schools.com/howto/howto_css_split_screen.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[HOWTO CSS Split Screen]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Instead of floating two 50%-width columns (the technique used in `[[HOWTO CSS Two Columns]]`), this recipe fixes BOTH halves to the viewport independently — `.split { position: fixed; height: 100%; width: 50%; }` combined with `.left { left: 0; }` / `.right { right: 0; }` pins each half to an opposite screen edge, meaning the two halves never scroll and always occupy exactly half the viewport regardless of page content length, which float-based columns cannot guarantee (floated columns follow document flow and CAN scroll). [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`position: fixed; width: 50%; height: 100%;`** — anchors each half to the viewport, not the document flow, so both halves are always visible and exactly half-width. [S1]
+- **`left: 0` / `right: 0`** — pins one half to the left edge, the other to the right edge, with no gap or overlap. [S1]
+- **Centered content inside each half** — reuses the absolute+transform centering technique (`position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);`) already seen in `[[HOWTO CSS Center Vertical]]`, applied per-half. [S1]
+
+## 📖 세부 내용 (Details)
+- Split halves: `.split { height: 100%; width: 50%; position: fixed; z-index: 1; top: 0; overflow-x: hidden; } .left { left: 0; background-color: #111; } .right { right: 0; background-color: red; }`. [S1]
+- Centered content: `.centered { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); text-align: center; } .centered img { width: 150px; border-radius: 50%; }`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+- **fixed 포지셔닝이 float 기반 2단 컬럼과 근본적으로 다름**: `[[HOWTO CSS Two Columns]]`의 float 기반 2단 레이아웃은 문서 흐름을 따라 스크롤되지만, 이 레시피는 두 절반을 각각 position:fixed로 뷰포트에 고정해 항상 화면 절반씩을 차지하고 스크롤되지 않는다는 점이 핵심 차이로 확인됨. [S1]
+
+## 🛠️ 적용 사례 (Applied in summary)
+왼쪽에 여성 아바타, 오른쪽에 남성 아바타를 각각 배치해 화면을 정확히 반으로 나누는 예제가 원문에서 직접 제시됨. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Two viewport-fixed halves, each pinned to an opposite edge (CSS):
+```css
+.split {
+  height: 100%;
+  width: 50%;
+  position: fixed;
+  top: 0;
+}
+.left { left: 0; background-color: #111; }
+.right { right: 0; background-color: red; }
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference)
+- **신뢰 점수:** 0.83
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[W3Schools HOW TO]]
+- **관련 개념:** [[HOWTO CSS Two Columns]], [[HOWTO CSS Center Vertical]], [[HOWTO CSS Fixed Sidebar]]
+- **참조 맥락:** CSS Layout & Positioning 섹션.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — How To - Split Screen 1/2 — https://www.w3schools.com/howto/howto_css_split_screen.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "How To - Split Screen 1/2" recipe (Astra wiki-curation, P-Reinforce v3.1 format).