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10_Wiki/Dev/Topic_HOWTO/HOWTO_CSS_Fixed_Footer.md

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+---
+id: howto-css-fixed-footer
+title: "How To - Fixed Footer"
+category: "Web_Recipes"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["position fixed bottom footer"]
+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", "footer"]
+raw_sources: ["https://www.w3schools.com/howto/howto_css_fixed_footer.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[HOWTO CSS Fixed Footer]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+`position: fixed; bottom: 0; left: 0; width: 100%;` pins the footer to the VIEWPORT, not the document — meaning it stays visible on screen even while the page scrolls, which is exactly what makes a "fixed footer" behaviorally different from a normal footer that simply sits at the end of page content and scrolls away with everything else. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`position: fixed`** — removes the element from normal flow and anchors it relative to the VIEWPORT (browser window), not the document, so it never scrolls out of view. [S1]
+- **`bottom: 0; left: 0; width: 100%;`** — pins the fixed element to the bottom edge and stretches it the full viewport width. [S1]
+
+## 📖 세부 내용 (Details)
+- Full example: `.footer { position: fixed; left: 0; bottom: 0; width: 100%; background-color: red; color: white; text-align: center; } <div class="footer"><p>Footer</p></div>`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+없음 — 신규 레시피, 기존 문서와 모순되는 내용 없음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+빨간 배경의 "Footer" 텍스트 바를 화면 하단에 고정하는 최소 예제가 원문에서 직접 제시됨. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Fixed footer pinned to the viewport bottom (CSS):
+```css
+.footer {
+  position: fixed;
+  left: 0;
+  bottom: 0;
+  width: 100%;
+  background-color: red;
+  color: white;
+  text-align: center;
+}
+```
+
+## ✅ 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 Fixed Menu]], [[HOWTO CSS Fixed Sidebar]], [[HOWTO CSS Sticky Element]]
+- **참조 맥락:** CSS Layout & Positioning 섹션.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — How To - Fixed Footer — https://www.w3schools.com/howto/howto_css_fixed_footer.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "How To - Fixed Footer" recipe (Astra wiki-curation, P-Reinforce v3.1 format).