/* Blog index + posts */

:root {
  --blog-text: #1b2545;
  --blog-muted: #8891aa;
  --blog-blue: #4a5fc1;
  --blog-blue-tint: #edf0fb;
  --blog-border: #e4e8f0;
}

body.blog {
  background: #ffffff;
  color: var(--blog-text);
  line-height: 1.7;
}

.blog-page {
  max-width: 680px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
}

.blog-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}
.blog-header .back-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  color: var(--blog-text);
  transition: background 120ms;
}
.blog-header .back-btn:hover { background: var(--blog-blue-tint); }
.blog-header h1,
.blog-header .blog-nav-label {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

/* Index list */
.blog-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.blog-list li {
  border-bottom: 1px solid var(--blog-border);
  padding-bottom: var(--space-lg);
}
.blog-list li:last-child { border-bottom: 0; }
.blog-list a.post-link {
  display: block;
  text-decoration: none;
  color: inherit;
}
.blog-list h2 {
  margin: 0 0 var(--space-xs);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--blog-blue);
}
.blog-list a.post-link:hover h2 { text-decoration: underline; }
.blog-list p {
  margin: 0;
  color: var(--blog-muted);
  font-size: 0.9375rem;
}

/* Post body */
.post {
  font-size: 1.0625rem;
}
.post .post-meta {
  color: var(--blog-muted);
  font-size: 0.875rem;
  margin: 0 0 var(--space-lg);
}
.post .post-title {
  margin: 0 0 var(--space-md);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.post .lede {
  font-size: 1.125rem;
  color: var(--blog-text);
  margin: 0 0 var(--space-xl);
}
.post h2 {
  margin: var(--space-2xl) 0 var(--space-sm);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.post h3 {
  margin: var(--space-xl) 0 var(--space-xs);
  font-size: 1.125rem;
  font-weight: 600;
}
.post p {
  margin: 0 0 var(--space-md);
}
.post ul, .post ol {
  margin: 0 0 var(--space-md);
  padding-left: 1.5rem;
}
.post li { margin-bottom: var(--space-xs); }
.post strong { font-weight: 600; }
.post a {
  color: var(--blog-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.post a:hover { color: #3b4ca0; }

.post .cta {
  display: inline-block;
  margin: var(--space-md) 0 var(--space-xl);
  padding: 12px 20px;
  background: var(--blog-blue);
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
}
.post .cta:hover { background: #3b4ca0; color: #fff; }

.post .related {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--blog-border);
}
.post .related h3 {
  margin: 0 0 var(--space-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--blog-muted);
}
.post .related ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.post .related li { margin-bottom: var(--space-xs); }

.blog-footer {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--blog-border);
  text-align: center;
  font-size: 0.875rem;
  color: var(--blog-muted);
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.blog-footer a {
  color: var(--blog-muted);
  text-decoration: none;
}
.blog-footer a:hover {
  color: var(--blog-text);
  text-decoration: underline;
}

/* Sudoku strategy diagrams */
.post figure.sudoku-figure {
  margin: var(--space-lg) 0;
}
.post .sudoku-diagram {
  width: 100%;
  max-width: 340px;
  height: auto;
  display: block;
  margin: 0 auto;
  border: 1px solid var(--blog-border);
  border-radius: 10px;
}
.post .sudoku-figure figcaption {
  text-align: center;
  font-size: 0.875rem;
  color: var(--blog-muted);
  margin-top: var(--space-sm);
  line-height: 1.5;
}
.post .sudoku-pair {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin: var(--space-lg) 0;
}
.post .sudoku-pair figure {
  flex: 1 1 240px;
  margin: 0;
}
.post .sudoku-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  justify-content: center;
  font-size: 0.8125rem;
  color: var(--blog-text);
  margin: var(--space-sm) 0 0;
  padding: 0;
  list-style: none;
}
.post .sudoku-legend li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
}
.post .sudoku-legend i {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  display: inline-block;
  flex: none;
}
/* Generic strategy diagrams (Minesweeper / 2048) */
.post figure.diagram-figure {
  margin: var(--space-lg) 0;
}
.post .diagram {
  width: 100%;
  max-width: 300px;
  height: auto;
  display: block;
  margin: 0 auto;
  border: 1px solid var(--blog-border);
  border-radius: 10px;
  background: #fff;
}
.post .diagram.diagram-2048 {
  max-width: 320px;
  border: none;
}
.post .diagram-figure figcaption {
  text-align: center;
  font-size: 0.875rem;
  color: var(--blog-muted);
  margin-top: var(--space-sm);
  line-height: 1.5;
}
.post .diagram-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  justify-content: center;
  font-size: 0.8125rem;
  color: var(--blog-text);
  margin: var(--space-sm) 0 0;
  padding: 0;
  list-style: none;
}
.post .diagram-legend li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
}
.post .diagram-legend i {
  width: 14px;
  height: 14px;
  border-radius: 3px;
  display: inline-block;
  flex: none;
}

/* Strategy index cards on the pillar page */
.post .strategy-grid {
  list-style: none;
  padding: 0;
  margin: var(--space-lg) 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-md);
}
.post .strategy-grid li { margin: 0; }
.post .strategy-grid a {
  display: block;
  height: 100%;
  padding: var(--space-md);
  border: 1px solid var(--blog-border);
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
  transition: border-color 120ms, background 120ms;
}
.post .strategy-grid a:hover {
  border-color: var(--blog-blue);
  background: var(--blog-blue-tint);
}
.post .strategy-grid h3 {
  margin: 0 0 4px;
  font-size: 1rem;
  color: var(--blog-blue);
}
.post .strategy-grid p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--blog-muted);
}
.post .level-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--blog-blue);
  background: var(--blog-blue-tint);
  padding: 2px 8px;
  border-radius: 999px;
  margin-bottom: var(--space-xs);
}