---
id: howto-css-round-buttons
title: "How To - Round Buttons"
category: "Web_Recipes"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["circle button CSS", "border-radius spectrum"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.8
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_round_buttons.asp"]
applied_in: []
github_commit: ""
---

# [[HOWTO CSS Round Buttons]]

## 🎯 한 줄 통찰 (One-line insight)
This recipe demonstrates the FULL `border-radius` spectrum in one place — five buttons with identical base styling but five different radius values (2px, 4px, 8px, 12px, 50%) — making explicit what `[[HOWTO CSS Pill Button]]` only implied: `border-radius` is a continuous dial from "barely rounded corners" to "fully circular," and pill/round buttons are just two named stops along that same dial rather than distinct techniques. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Shared base class + radius-only modifiers** — `.button` sets background/padding/color once; five `.buttonN` classes each differ ONLY in `border-radius` value. [S1]
- **`border-radius: 50%`** — the endpoint of the spectrum, producing a full circle (requires roughly equal width/height, which square padding here approximates). [S1]

## 📖 세부 내용 (Details)
- `.button { background-color: #04AA6D; border: none; color: white; padding: 20px; } .button1 {border-radius: 2px;} .button2 {border-radius: 4px;} .button3 {border-radius: 8px;} .button4 {border-radius: 12px;} .button5 {border-radius: 50%;}`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
- **Pill Button과 동일한 속성 스펙트럼의 시각적 증명**: `[[HOWTO CSS Pill Button]]`이 16px 하나의 값만 보여줬다면, 이 레시피는 2px부터 50%까지 다섯 단계를 나란히 배치해 border-radius가 연속적인 값의 스펙트럼임을 명시적으로 보여준다는 점이 확인됨. [S1]

## 🛠️ 적용 사례 (Applied in summary)
동일한 버튼에 border-radius 값만 2px/4px/8px/12px/50%로 바꿔가며 다섯 가지 결과를 나란히 비교하는 예제가 원문에서 직접 제시됨. [S1]

## 💻 코드 패턴 (Code patterns)
Border-radius spectrum from barely-rounded to fully circular (CSS):
```css
.button { background-color: #04AA6D; border: none; color: white; padding: 20px; }
.button1 { border-radius: 2px; }
.button5 { border-radius: 50%; } /* fully circular */
```

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual
- **출처 신뢰도:** B (W3Schools — widely used educational reference)
- **신뢰 점수:** 0.80
- **중복 검사 결과:** 신규 생성 (New discovery)

## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[W3Schools HOW TO]]
- **관련 개념:** [[HOWTO CSS Pill Button]], [[HOWTO CSS Notification Button]], [[HOWTO CSS Social Media Buttons]]
- **참조 맥락:** CSS Buttons 섹션.

## 📚 출처 (Sources)
- [S1] W3Schools — How To - Round Buttons — https://www.w3schools.com/howto/howto_css_round_buttons.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "How To - Round Buttons" recipe (Astra wiki-curation, P-Reinforce v3.1 format).