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Antigravity Agent e9cbf23ab5 docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영.

- Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들
  (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거.
- Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/
  Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/
  Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이
  존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존).
- Dev의 W3Schools 언어 튜토리얼 폴더(Topic_C/CPP/CSS/CSharp/HOWTO/HTML/Java/
  JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동.
- 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리.
- Topic_Programming 최종 문서 수: 2784 → 3985.

2026-07-05 00:39:13 +09:00

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Raw Blame History

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title

CSS Image Effects

🎯 한 줄 통찰 (One-line insight)

The W3Schools "CSS Image Effects" page covers two effects: making images transparent with the opacity property, and overlaying text on an image positioned at the corners or center. [S1]

🧠 핵심 개념 (Core concepts)

Image opacity — the opacity property controls how transparent an image is, taking values from 0.0 (fully transparent) to 1.0 (fully opaque). [S1]
Partial transparency — values between, such as 0.5, render the image partially see-through. [S1]
Text on an image — text can be overlaid on an image and positioned at the top left, top right, bottom left, bottom right, or centered. [S1]

🧩 추출된 패턴 (Extracted patterns)

Opacity as a 0–1 dial — transparency is a single continuous value where lower means more see-through, useful for hover dimming or watermark effects. [S1]
Corner-anchored overlay — positioning text over an image relies on a positioned container with the text element placed against a chosen corner or centered. [S1]

📖 세부 내용 (Details)

Image opacity / transparency The opacity property specifies the transparency of an image. It accepts a value from 0.0 to 1.0: the lower the value, the more transparent the image. A value of 0.0 makes the image fully transparent, an intermediate value such as 0.5 makes it partially transparent, and 1.0 is the default (fully opaque). [S1]

Image text positioning Text can be placed on top of an image and positioned in different spots: top left, top right, bottom left, bottom right, or centered. The fetched content describes these positioning options but does not include the inline CSS declaration blocks for each placement — those appear only behind the page's "Try it Yourself" examples. The exact per-position CSS is "Not found in source". [S1]

Note: The page title "CSS Image Effects" on W3Schools does NOT cover image reflection (box-reflect). The fetched content confirms the page is limited to image opacity/transparency and image text positioning. [S1]

🛠️ 적용 사례 (Applied in summary)

The source's applied cases are the opacity-based transparency demos (full, partial, and full opacity) and the text-over-image positioning demos. No external project/commit applications found in the source.

💻 코드 패턴 (Code patterns)

Image transparency dial (language: CSS):

img {
  opacity: 0.5;
}

⚖️ 모순 및 업데이트 (Contradictions & updates)

No contradictions found in the source. Note that the per-corner text-positioning CSS was not present inline in the fetched content (marked "Not found in source" above).

✅ 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: 0.85
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: CSS Tutorial
관련 개념: CSS Image Hover, CSS Image Filters, CSS Image Styling, CSS Position
참조 맥락: Referenced when dimming images via opacity or labeling images with overlaid text.

📚 출처 (Sources)

[S1] W3Schools — CSS Image Effects — https://www.w3schools.com/css/css3_images_effects.asp

📝 변경 이력 (Change history)

2026-06-23: Initial draft synthesized from the W3Schools "CSS Image Effects" page (Astra wiki-curation, P-Reinforce v3.1 format).

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