* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: sans-serif; font-size: 14px; color: #333; background: #f5f5f5; }

header { background: #333; color: #fff; padding: 10px 20px; }
header nav a { color: #fff; text-decoration: none; margin-right: 15px; }
header nav a:hover { text-decoration: underline; }
main { max-width: 900px; margin: 20px auto; padding: 0 15px; }
footer { text-align: center; padding: 20px; color: #999; font-size: 12px; }
h1 { margin-bottom: 15px; font-size: 20px; }

.article-list { list-style: none; }
.article-item { padding: 6px 0; border-bottom: 1px solid #e0e0e0; display: flex; gap: 10px; align-items: baseline; }
.site-name { color: #666; font-size: 12px; min-width: 120px; white-space: nowrap; }
.article-item a { color: #1a0dab; text-decoration: none; flex: 1; }
.article-item a:visited { color: #609; }
.article-item a:hover { text-decoration: underline; }
.published-at { color: #999; font-size: 12px; white-space: nowrap; }

.ranking-table { width: 100%; border-collapse: collapse; background: #fff; }
.ranking-table th, .ranking-table td { padding: 8px 10px; border: 1px solid #ddd; text-align: left; }
.ranking-table th { background: #f0f0f0; }
.ranking-table a { color: #1a0dab; text-decoration: none; }
.ranking-table a:hover { text-decoration: underline; }

.admin-table { width: 100%; border-collapse: collapse; background: #fff; margin-top: 15px; }
.admin-table th, .admin-table td { padding: 8px 10px; border: 1px solid #ddd; text-align: left; }
.admin-table th { background: #f0f0f0; }

form div { margin: 10px 0; }
label { display: block; margin-bottom: 4px; font-weight: bold; }
input[type=text], input[type=url], input[type=password] {
    width: 100%; max-width: 400px; padding: 6px 8px;
    border: 1px solid #ccc; border-radius: 3px;
}
button, .btn {
    padding: 6px 16px; background: #333; color: #fff;
    border: none; border-radius: 3px; cursor: pointer;
    text-decoration: none; font-size: 14px; display: inline-block;
}
button:hover, .btn:hover { background: #555; }
.btn-danger { background: #c00; }
.btn-danger:hover { background: #e00; }
.error { color: #c00; margin: 8px 0; }
.mt { margin-top: 15px; }