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.
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Antigravity Agent
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id: css-table-alignment
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title: "CSS Table Alignment"
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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: ["table text-align", "table vertical-align", "table alignment", "th td alignment", "center table cell"]
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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", "table", "text-align", "vertical-align"]
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raw_sources: ["https://www.w3schools.com/css/css_table_align.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[CSS Table Alignment]]
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## 🎯 한 줄 통찰 (One-line insight)
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`text-align` controls horizontal alignment and `vertical-align` controls vertical alignment of content inside `<th>` and `<td>` cells. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **`text-align` = horizontal** — the CSS `text-align` property is used to set the horizontal alignment of the content in `<th>` or `<td>`. [S1]
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- **`vertical-align` = vertical** — the CSS `vertical-align` property sets the vertical alignment (like top, bottom, or middle) of the content in `<th>` or `<td>`. [S1]
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- **Defaults for headers vs data** — by default, the content of `<th>` elements is center-aligned and the content of `<td>` elements is left-aligned. [S1]
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- **Default vertical alignment** — by default, the vertical alignment of the content in a table is middle (for both `<th>` and `<td>` elements). [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Horizontal values** — `text-align` accepts `left` (aligns text to the left), `right` (aligns text to the right), and `center` (centers the text). [S1]
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- **Vertical sizing pairing** — to make a vertical alignment visible, give the cell a `height` and then set `vertical-align` (e.g. `bottom`). [S1]
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## 📖 세부 내용 (Details)
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**Horizontal Alignment**
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The CSS `text-align` property is used to set the horizontal alignment of the content in `<th>` or `<td>`. Property values: [S1]
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- `left` — aligns the text to the left
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- `right` — aligns the text to the right
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- `center` — centers the text
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**Note:** By default, the content of `<th>` elements is center-aligned and the content of `<td>` elements is left-aligned. [S1]
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Center the content of `<td>` elements: [S1]
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```css
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td {
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text-align: center;
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}
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```
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Left-align the content of `<th>` elements: [S1]
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```css
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th {
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text-align: left;
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}
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```
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**Vertical Alignment**
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The CSS `vertical-align` property sets the vertical alignment (like top, bottom, or middle) of the content in `<th>` or `<td>`. [S1]
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**Note:** By default, the vertical alignment of the content in a table is middle (for both `<th>` and `<td>` elements). [S1]
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The example below sets the vertical text alignment to bottom for `<td>` elements: [S1]
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```css
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td {
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height: 50px;
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vertical-align: bottom;
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}
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```
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The source illustrates these rules with sample data tables containing Firstname/Lastname/Savings columns (e.g. Peter Griffin / $100, Lois Griffin / $150, Joe Swanson / $300). [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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The page's own examples are the applied cases: centering `<td>` content, left-aligning `<th>` content, and bottom vertical alignment of `<td>` with a 50px height. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Horizontal alignment (language: CSS):
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```css
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td {
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text-align: center;
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}
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```
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Vertical alignment (language: CSS):
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```css
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td {
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height: 50px;
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vertical-align: bottom;
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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 Table Size]], [[CSS Table Styling]], [[CSS Table Responsive]]
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- **참조 맥락:** Referenced whenever aligning header or data content inside an HTML table.
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## 📚 출처 (Sources)
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- [S1] W3Schools — CSS Table Alignment — https://www.w3schools.com/css/css_table_align.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "CSS Table Alignment" page (Astra wiki-curation, P-Reinforce v3.1 format).
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