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+---
+title: border-top-width
+slug: Web/CSS/border-top-width
+tags:
+  - CSS
+  - CSS Borders
+  - CSS Property
+  - Reference
+  - 'recipe:css-property'
+translation_of: Web/CSS/border-top-width
+---
+<div>{{CSSRef}}</div>
+
+<p><a href="/ko/docs/Web/CSS">CSS</a> <strong><code>border-top-width</code></strong> 속성은 요소의 위쪽 테두리 너비를 지정합니다.</p>
+
+<div>{{EmbedInteractiveExample("pages/css/border-top-width.html")}}</div>
+
+
+
+<h2 id="구문">구문</h2>
+
+<pre class="brush:css no-line-numbers notranslate">/* 키워드 값*/
+border-top-width: thin;
+border-top-width: medium;
+border-top-width: thick;
+
+/* &lt;length&gt; 값 */
+border-top-width: 10em;
+border-top-width: 3vmax;
+border-top-width: 6px;
+
+/* 전역 값 */
+border-top-width: inherit;
+border-top-width: initial;
+border-top-width: unset;
+</pre>
+
+<h3 id="값">값</h3>
+
+<dl>
+ <dt><code>&lt;line-width&gt;</code></dt>
+ <dd>테두리의 너비입니다. 0 이상의 {{cssxref("&lt;length&gt;")}} 또는 키워드를 사용할 수 있습니다. 키워드는 다음 세 가지 중 하나여야 합니다.
+ <table class="standard-table">
+  <tbody>
+   <tr>
+    <td><code>thin</code></td>
+    <td>
+     <div style="margin: 0.5em; width: 3em; height: 3em; border-top-style: solid; border-top-width: thin; background-color: palegreen;"></div>
+    </td>
+    <td>얇은 테두리</td>
+   </tr>
+   <tr>
+    <td><code>medium</code></td>
+    <td>
+     <div style="margin: 0.5em; width: 3em; height: 3em; border-top-style: solid; border-top-width: medium; background-color: palegreen;"></div>
+    </td>
+    <td>중간 테두리</td>
+   </tr>
+   <tr>
+    <td><code>thick</code></td>
+    <td>
+     <div style="margin: 0.5em; width: 3em; height: 3em; border-top-style: solid; border-top-width: thick; background-color: palegreen;"></div>
+    </td>
+    <td>넓은 테두리</td>
+   </tr>
+  </tbody>
+ </table>
+
+ <div class="note">
+ <p><strong>참고:</strong> 각 키워드의 굵기를 정의한 명세는 없기 때문에 결과는 구현별로 상이할 수 있습니다. 다만 굵기는 언제나 <code>thin ≤ medium ≤ thick</code>이고, 하나의 문서 내에서 동일합니다.</p>
+ </div>
+ </dd>
+</dl>
+
+<h2 id="형식_정의">형식 정의</h2>
+
+<p>{{cssinfo}}</p>
+
+<h2 id="형식_구문">형식 구문</h2>
+
+<pre class="syntaxbox notranslate">{{csssyntax}}</pre>
+
+<h2 id="예제">예제</h2>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html notranslate">&lt;div&gt;Element 1&lt;/div&gt;
+&lt;div&gt;Element 2&lt;/div&gt;</pre>
+
+<h3 id="CSS">CSS</h3>
+
+<pre class="brush: css notranslate">div {
+  border: 1px solid red;
+  margin: 1em 0;
+}
+
+div:nth-child(1) {
+  border-top-width: thick;
+}
+div:nth-child(2) {
+  border-top-width: 2em;
+}</pre>
+
+<h3 id="결과">결과</h3>
+
+<p>{{EmbedLiveSample('예제', '100%')}}</p>
+
+<h2 id="명세">명세</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">Specification</th>
+   <th scope="col">Status</th>
+   <th scope="col">Comment</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('CSS3 Backgrounds', '#the-border-width', 'border-top-width')}}</td>
+   <td>{{Spec2('CSS3 Backgrounds')}}</td>
+   <td>No significant change.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('CSS2.1', 'box.html#border-width-properties', 'border-top-width')}}</td>
+   <td>{{Spec2('CSS2.1')}}</td>
+   <td>No significant change.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('CSS1', '#border-left-width', 'border-top-width')}}</td>
+   <td>{{Spec2('CSS1')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="브라우저_호환성">브라우저 호환성</h2>
+
+
+
+<p>{{Compat("css.properties.border-top-width")}}</p>
+
+<h2 id="같이_보기">같이 보기</h2>
+
+<ul>
+ <li>테두리 너비 관련 CSS 속성: {{Cssxref("border-left-width")}}, {{Cssxref("border-right-width")}}, {{Cssxref("border-bottom-width")}}, and {{Cssxref("border-width")}}.</li>
+ <li>위쪽 테두리 관련 CSS 속성: {{Cssxref("border")}}, {{Cssxref("border-top")}}, {{Cssxref("border-top-style")}}, and {{Cssxref("border-top-color")}}.</li>
+</ul>