body {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;

    font-family: sans-serif;
    line-height: 1.8;
}

header {
    border-bottom: 1px solid #ccc;
    margin-bottom: 40px;
}

nav a {
    margin-right: 20px;
}

article {
    margin-bottom: 50px;
}

.date {
    color: #777;
    font-size: 0.9em;
}

footer {
    border-top: 1px solid #ccc;
    margin-top: 50px;
    padding-top: 20px;
}

/* ヘッダー */

.site-header {
    border-bottom: 1px solid #ddd;
    padding: 20px 0;
    margin-bottom: 40px;
}

.header-inner {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    margin: 0;
    font-size: 24px;
}

.site-title a {
    color: #333;
    text-decoration: none;
}

.site-nav {
    display: flex;
    gap: 20px;
}

.site-nav a {
    color: #555;
    text-decoration: none;
}

.site-nav a:hover {
    text-decoration: underline;
}

/* 記事一覧 */

.article-list {
    margin-top: 30px;
}


.article-card {

    border-bottom: 1px solid #ddd;

    padding: 20px 0;

}


.article-card h3 {

    margin-bottom: 5px;

}


.article-card a {

    color: #333;

    text-decoration: none;

}


.article-card a:hover {

    text-decoration: underline;

}