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10_Wiki/Dev/Topic_HOWTO/HOWTO_CSS_Alert_Buttons.md

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+---
+id: howto-css-alert-buttons
+title: "How To - Alert Buttons"
+category: "Web_Recipes"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["success info warning danger buttons"]
+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", "buttons"]
+raw_sources: ["https://www.w3schools.com/howto/howto_css_alert_buttons.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[HOWTO CSS Alert Buttons]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+A shared `.btn` base class handles all the STRUCTURAL styling (border removal, padding, cursor) once, while five separate semantic modifier classes (`.success`, `.info`, `.warning`, `.danger`, `.default`) each carry ONLY a background-color pair (normal + `:hover`) — this base+modifier split means adding a sixth alert color later requires just one new 2-line modifier class, not a full button redefinition. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Shared base class `.btn`** — `border: none; color: white; padding: 14px 28px; cursor: pointer;` applied once to every alert button. [S1]
+- **Color-coded semantic modifiers** — `.success` (green), `.info` (blue), `.warning` (orange), `.danger` (red), `.default` (gray, with black text instead of white). [S1]
+- **Each modifier defines its own `:hover`** — a slightly darker shade of the same hue, applied consistently across all five variants. [S1]
+
+## 📖 세부 내용 (Details)
+- HTML: `<button class="btn success">Success</button>` (and similarly for info/warning/danger/default). [S1]
+- CSS colors: success `#04AA6D`→hover `#46a049`; info `#2196F3`→hover `#0b7dda`; warning `#ff9800`→hover `#e68a00`; danger `#f44336`→hover `#da190b`; default `#e7e7e7` (black text)→hover `#ddd`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+없음 — 신규 레시피, 기존 문서와 모순되는 내용 없음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+Success/Info/Warning/Danger/Default 5가지 색상의 알림 버튼을 하나의 공통 .btn 클래스와 색상별 수식 클래스로 구현하는 예제가 원문에서 직접 제시됨. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Base class + semantic color modifiers (CSS):
+```css
+.btn {
+  border: none;
+  color: white;
+  padding: 14px 28px;
+  cursor: pointer;
+}
+.success { background-color: #04AA6D; }
+.success:hover { background-color: #46a049; }
+.danger { background-color: #f44336; }
+.danger:hover { background-color: #da190b; }
+```
+
+## ✅ 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 Block Buttons]], [[HOWTO CSS Outline Buttons]], [[HOWTO CSS Text Buttons]]
+- **참조 맥락:** CSS Buttons 섹션.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — How To - Alert Buttons — https://www.w3schools.com/howto/howto_css_alert_buttons.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "How To - Alert Buttons" recipe (Astra wiki-curation, P-Reinforce v3.1 format).