/* Breadcrumb */
.breadcrumb {
  font-size: 12px;
  color: #888;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb a {
  color: #1a5276;
}

/* Article */
.article {
  background: white;
  border: 1px solid #ddd;
  padding: 24px 28px;
  margin-bottom: 20px;
}

.article-header {
  border-bottom: 1px solid #eee;
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.article-category {
  font-size: 11px;
  color: white;
  background: #243c58;
  display: inline-block;
  padding: 2px 10px;
  border-radius: 3px;
  margin-bottom: 10px;
}

.article-title {
  font-size: 22px;
  font-weight: bold;
  color: #1a2c42;
  line-height: 1.4;
  margin-bottom: 10px;
}

.article-meta {
  font-size: 12px;
  color: #999;
  display: flex;
  gap: 16px;
}

/* Article Body */
.article-body h2 {
  font-size: 17px;
  font-weight: bold;
  color: #1a2c42;
  border-left: 4px solid #e67e22;
  padding: 4px 0 4px 10px;
  margin: 28px 0 14px;
}

.article-body h3 {
  font-size: 14px;
  font-weight: bold;
  color: #243c58;
  border-bottom: 1px solid #dde;
  padding-bottom: 4px;
  margin: 20px 0 10px;
}

.article-body p {
  margin-bottom: 12px;
  line-height: 1.8;
}

.article-body ul,
.article-body ol {
  margin: 10px 0 14px 20px;
  line-height: 1.8;
}

/* Table of Contents */
.toc {
  background: #f0f4f8;
  border: 1px solid #ccd6e0;
  border-radius: 4px;
  padding: 14px 18px;
  margin-bottom: 24px;
  display: inline-block;
  min-width: 260px;
}

.toc-title {
  font-weight: bold;
  font-size: 13px;
  color: #1a2c42;
  margin-bottom: 8px;
}

.toc ol {
  margin: 0 0 0 18px;
  padding: 0;
}

.toc li {
  padding: 3px 0;
  font-size: 13px;
}

.toc a {
  color: #1a5276;
}

/* Code Block */
.code-block {
  background: #1e2d3d;
  border-radius: 4px;
  margin: 12px 0 16px;
  overflow: hidden;
}

.code-label {
  background: #243c58;
  color: #7fb3d3;
  font-size: 11px;
  padding: 5px 14px;
  font-family: "Courier New", monospace;
  border-bottom: 1px solid #1a2c42;
}

.code-block pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
}

.code-block code {
  color: #a8d8a8;
  font-family: "Courier New", Consolas, monospace;
  font-size: 13px;
  line-height: 1.7;
  background: none;
}

/* Inline code */
.article-body code {
  background: #eef2f6;
  color: #c0392b;
  font-family: "Courier New", Consolas, monospace;
  font-size: 12px;
  padding: 1px 5px;
  border-radius: 3px;
}

.code-block code {
  background: none;
  color: #a8d8a8;
  padding: 0;
}

/* Info / Warn Box */
.info-box {
  background: #eaf4fb;
  border-left: 4px solid #2980b9;
  padding: 10px 14px;
  margin: 14px 0;
  font-size: 13px;
  border-radius: 0 4px 4px 0;
}

.warn-box {
  background: #fef9e7;
  border-left: 4px solid #e67e22;
  padding: 10px 14px;
  margin: 14px 0;
  font-size: 13px;
  border-radius: 0 4px 4px 0;
}

/* 囲みボックス内の段落は末尾の余白を詰める(Markdown由来の <p> 対策) */
.info-box p:last-child,
.warn-box p:last-child {
  margin-bottom: 0;
}

/* Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0 18px;
  font-size: 13px;
}

.data-table th {
  background: #243c58;
  color: white;
  padding: 8px 12px;
  text-align: left;
  font-weight: bold;
}

.data-table td {
  padding: 7px 12px;
  border-bottom: 1px solid #eee;
}

.data-table tr:nth-child(even) td {
  background: #f7f9fb;
}

.data-table tr:hover td {
  background: #eaf4fb;
}

/* Tips list */
.tips-list {
  margin: 10px 0 0 20px;
  line-height: 2;
  font-size: 13px;
}

/* Article Footer */
.article-footer {
  border-top: 1px solid #eee;
  padding-top: 18px;
  margin-top: 28px;
}

.related h3 {
  font-size: 14px;
  font-weight: bold;
  color: #1a2c42;
  margin-bottom: 10px;
}

.related ul {
  list-style: none;
  padding: 0;
}

.related ul li {
  padding: 5px 0;
  border-bottom: 1px dotted #ddd;
  font-size: 13px;
}

.related ul li::before {
  content: "› ";
  color: #e67e22;
  font-weight: bold;
}

/* Sidebar links */
.sidebar-links {
  list-style: none;
  padding: 0;
}

.sidebar-links li {
  border-bottom: 1px dotted #eee;
}

.sidebar-links li a {
  display: block;
  padding: 6px 2px;
  font-size: 13px;
}

.active-link {
  color: #e67e22 !important;
  font-weight: bold;
}

/* Sidebar TOC tree (curriculum navigation) */
.toc-nav {
  list-style: none;
  padding: 0;
  font-size: 13px;
}

.toc-nav > li {
  margin-bottom: 10px;
}

.toc-nav .toc-chapter {
  font-weight: bold;
  color: #1a2c42;
  display: block;
  padding: 4px 0;
  border-bottom: 1px solid #dde;
  margin-bottom: 4px;
}

.toc-nav ul {
  list-style: none;
  padding: 0 0 0 12px;
  margin: 0;
}

.toc-nav ul li a {
  display: block;
  padding: 4px 2px;
  color: #1a5276;
  border-bottom: 1px dotted #eee;
}

/* Prev / Next pager */
.pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid #eee;
}

.pager a {
  flex: 1;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 10px 14px;
  background: #fafafa;
  color: #333;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.pager a:hover {
  border-color: #e67e22;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
  text-decoration: none;
}

.pager .pager-label {
  display: block;
  font-size: 11px;
  color: #888;
  margin-bottom: 4px;
}

.pager .pager-title {
  font-size: 13px;
  font-weight: bold;
  color: #1a5276;
}

.pager .next {
  text-align: right;
}

.pager .disabled {
  visibility: hidden;
}