.markdown-body {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 1.6rem;
  line-height: 1.8;
  color: #333;
  background-color: #fff;
  padding: 2em;
  border: 1px solid #ddd;
  border-radius: 6px;
  max-width: 800px;
  margin: 2em auto;
  overflow-wrap: break-word;
}

/* ヘッダー */
.markdown-body h1 {
  font-size: 2.4rem;
  margin-top: 1em;
  margin-bottom: 0.5em;
  border-bottom: 1px solid #ccc;
  padding-bottom: 0.3em;
}
.markdown-body h2 {
  font-size: 2rem;
  margin-top: 1.2em;
  margin-bottom: 0.4em;
}
.markdown-body h3 {
  font-size: 1.6rem;
  margin-top: 1em;
  margin-bottom: 0.3em;
}

/* 段落 */
.markdown-body p {
  margin: 1em 0;
}

/* リスト */
.markdown-body ul,
.markdown-body ol {
  margin-left: 2em;
  margin-bottom: 1em;
}
.markdown-body li {
  margin: 0.3em 0;
}

/* コード */
.markdown-body code {
  background-color: #f5f5f5;
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-family: "Courier New", Courier, monospace;
  font-size: 90%;
}
.markdown-body pre code {
  display: block;
  padding: 1em;
  background: #f0f0f0;
  border-radius: 5px;
  overflow-x: auto;
}

/* リンク */
.markdown-body a {
  color: #007bff;
  text-decoration: none;
}
.markdown-body a:hover {
  text-decoration: underline;
}

/* テーブル */
.markdown-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
}
.markdown-body th,
.markdown-body td {
  border: 1px solid #ccc;
  padding: 0.5em;
  text-align: left;
}
.markdown-body th {
  background-color: #f9f9f9;
}

/* 引用 */
.markdown-body blockquote {
  border-left: 4px solid #ccc;
  padding-left: 1em;
  color: #666;
  margin: 1em 0;
  background-color: #fafafa;
}