docs(10_Wiki): W3Schools 위키화 — HTML/CSS/JavaScript(core)
W3Schools 튜토리얼을 P-Reinforce v3.1 포맷으로 위키화(영어 본문, 한/영 섹션 헤더). - Topic_HTML: 59문서 (튜토리얼+예제, 레퍼런스/메타 제외) - Topic_CSS: 190문서 (메인 + Advanced/Flexbox/Grid/RWD 전체) - Topic_JavaScript: 120문서 (코어 언어; Temporal/DOM상세/BOM/WebAPI/AJAX/jQuery/Graphics 등은 후속) 각 폴더 00_INDEX.md(MOC) 포함. 코드 verbatim, 미확인분은 "Not found in source" 표기. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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id: css-image-styling
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title: "CSS Image Styling"
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category: "Frontend"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["rounded images", "circled image", "CSS thumbnail", "responsive image", "polaroid card", "image styling"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.88
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created_at: 2026-06-23
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updated_at: 2026-06-23
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review_reason: ""
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merge_history: []
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tags: ["css", "web", "frontend", "w3schools", "images", "border-radius"]
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raw_sources: ["https://www.w3schools.com/css/css3_images.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CSS Image Styling]]
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## 🎯 한 줄 통찰 (One-line insight)
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CSS styles images with simple properties — `border-radius` rounds or circles them, borders and padding make thumbnails, `max-width: 100%` makes them responsive, and `box-shadow` turns them into polaroid-style cards. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **Rounded images** — `border-radius` rounds the corners of an image. [S1]
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- **Circled images** — `border-radius: 50%` makes an image fully circular. [S1]
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- **Thumbnails** — a border combined with `border-radius`, `padding`, and a fixed `width` produces a framed thumbnail. [S1]
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- **Responsive images** — `max-width: 100%` with `height: auto` scales an image down to fit its container while never exceeding its natural size. [S1]
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- **Polaroid cards** — a white background with a layered `box-shadow` and a captioned container gives a polaroid/card look. [S1]
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- **Responsive gallery** — `@media` queries with `calc()` widths lay out a grid of images that reflows by screen size. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Radius-driven shape** — the same `border-radius` property both softens corners (`8px`) and creates a perfect circle (`50%`). [S1]
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- **Fluid sizing** — `max-width: 100%; height: auto;` is the standard recipe for an image that shrinks with its container but keeps its aspect ratio. [S1]
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- **Card composition** — wrap an image in a container and add `box-shadow` plus a padded caption area to build a reusable card component. [S1]
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## 📖 세부 내용 (Details)
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**Rounded image**
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Use the `border-radius` property to create rounded corners on an image. [S1]
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```css
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img {
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border-radius: 8px;
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}
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```
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**Circled image**
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A `border-radius` of `50%` turns the image into a circle. [S1]
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```css
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img {
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border-radius: 50%;
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}
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```
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**Thumbnail images**
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Combine a border, rounded corners, padding, and a width to make a thumbnail. [S1]
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```css
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img {
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border: 1px solid #ddd;
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border-radius: 4px;
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padding: 5px;
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width: 150px;
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}
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```
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**Thumbnail as a link with hover**
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The tutorial also shows wrapping a thumbnail in a link and adding a `box-shadow` on hover for an interactive effect. The exact hover declaration block is not reproduced inline in the fetched content beyond the described `box-shadow` on hover. [S1]
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**Responsive images**
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A responsive image scales nicely to fit any container, using `max-width: 100%` and `height: auto`. [S1]
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```css
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img {
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max-width: 100%;
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height: auto;
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}
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```
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**Polaroid images / cards**
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Add a white background and a layered `box-shadow`, with the image filling the card width and a centered, padded caption container. [S1]
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```css
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div.polaroid {
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width: 80%;
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background-color: white;
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box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
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}
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img {
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width: 100%;
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}
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div.container {
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text-align: center;
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padding: 10px 20px;
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}
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```
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**Responsive image gallery**
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A gallery of images can be made responsive with `@media` queries and `calc()`-based widths so the number of columns adapts to the viewport. The full gallery markup was not reproduced inline in the fetched content. [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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The rounded, circled, thumbnail, responsive, and polaroid examples above are the source's applied cases for common image presentations. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Responsive image (language: CSS):
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```css
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img {
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max-width: 100%;
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height: auto;
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}
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```
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Circular avatar:
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```css
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img {
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border-radius: 50%;
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}
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```
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source.
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.88
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[CSS Tutorial]]
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- **관련 개념:** [[CSS Image Centering]], [[CSS Image Filters]], [[CSS Border]], [[CSS Box Shadow]]
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- **참조 맥락:** Referenced whenever presenting images as avatars, thumbnails, responsive media, or cards.
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## 📚 출처 (Sources)
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- [S1] W3Schools — CSS Image Styling — https://www.w3schools.com/css/css3_images.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Image Styling" page (Astra wiki-curation, P-Reinforce v3.1 format).
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