.blog-hero {
  padding: 72px 0 28px;
}

.blog-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 28px;
}
.blog-search {
  flex: 1 1 240px;
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  color: var(--text);
  font: inherit;
  padding: 12px 16px;
  outline: none;
}
.blog-search:focus { border-color: var(--accent); }
.blog-search::placeholder { color: var(--text-faint); }

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-btn {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.tag-btn:hover { border-color: var(--accent); color: var(--text); }
.tag-btn.on {
  background: rgba(91,140,255,0.16);
  border-color: rgba(91,140,255,0.45);
  color: #c5d6ff;
}

.blog-grid { display: grid; gap: 16px; padding-bottom: 80px; }
.blog-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 26px 28px;
  backdrop-filter: blur(8px);
  transition: transform 0.25s, border-color 0.25s;
}
.blog-card:hover { transform: translateY(-4px); border-color: rgba(120,160,255,0.4); }
.blog-card .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: center;
  margin-bottom: 10px;
}
.blog-card .date,
.post-date {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  color: var(--accent-2);
}
.blog-card h2 {
  margin: 0 0 10px;
  font-size: 1.28rem;
  letter-spacing: -0.01em;
}
.blog-card p { margin: 0; color: var(--text-dim); font-size: 0.95rem; }
.blog-card .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }

.empty {
  padding: 48px 24px;
  text-align: center;
  color: var(--text-dim);
  border: 1px dashed var(--panel-border);
  border-radius: var(--radius);
}

.post-wrap { max-width: var(--prose); margin: 0 auto; padding: 56px 0 80px; }
.post-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 28px;
}
.post-back:hover { color: var(--text); }
.post-title {
  font-size: clamp(1.8rem, 4.4vw, 2.7rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  font-weight: 800;
}
.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  margin-bottom: 36px;
  color: var(--text-dim);
  font-size: 0.88rem;
}
.post-meta .tags { display: flex; flex-wrap: wrap; gap: 8px; }

.prose { color: var(--text); font-size: 1.05rem; }
.prose > *:first-child { margin-top: 0; }
.prose h2 {
  font-size: 1.45rem;
  margin: 2.1em 0 0.7em;
  letter-spacing: -0.01em;
}
.prose h3 { font-size: 1.15rem; margin: 1.7em 0 0.55em; }
.prose p, .prose ul, .prose ol { color: var(--text-dim); }
.prose a { color: var(--accent-2); }
.prose strong { color: var(--text); font-weight: 600; }
.prose code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.84em;
  background: rgba(91,140,255,0.1);
  border: 1px solid var(--panel-border);
  padding: 0.12em 0.4em;
  border-radius: 6px;
}
.prose pre {
  position: relative;
  background: rgba(8, 12, 24, 0.85);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 18px 20px;
  overflow-x: auto;
}
.prose pre.has-copy { padding-top: 42px; }
.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  padding: 4px 10px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: rgba(7, 11, 22, 0.85);
  color: var(--text-dim);
  cursor: pointer;
}
.copy-btn:hover { color: var(--text); border-color: var(--accent); }
.prose pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: 0.82rem;
  color: var(--text);
}
.prose blockquote {
  margin: 1.4em 0;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--accent);
  color: var(--text-dim);
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 1.4em 0;
}
.prose th, .prose td {
  border-bottom: 1px solid var(--panel-border);
  padding: 10px 8px;
  text-align: left;
}
.prose th { color: var(--text); }
.prose img { max-width: 100%; border-radius: 12px; }
.prose hr { border: 0; border-top: 1px solid var(--panel-border); margin: 2.2em 0; }
.prose .katex { color: var(--text); font-size: 1.05em; }
.prose .katex-display { margin: 1.3em 0; overflow-x: auto; overflow-y: hidden; }

.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 48px;
}
@media (max-width: 640px) { .post-nav { grid-template-columns: 1fr; } }
.post-nav a {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 16px 18px;
  transition: border-color 0.2s, transform 0.2s;
}
.post-nav a:hover { border-color: var(--accent); transform: translateY(-2px); }
.post-nav .lbl {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  color: var(--accent-2);
  margin-bottom: 4px;
}
.post-nav .ttl { font-weight: 600; font-size: 0.95rem; }
.post-nav .next { text-align: right; }
.post-nav .spacer { visibility: hidden; }

.home-blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 880px) { .home-blog-grid { grid-template-columns: 1fr; } }
.home-blog-more { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 12px; }
.home-blog-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  color: var(--accent-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 8px 0 14px;
}
.home-blog-label + .home-blog-grid { margin-bottom: 8px; }
.post-note {
  margin: 0 0 16px;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid rgba(52,211,153,0.28);
  background: rgba(52,211,153,0.08);
  color: var(--text-dim);
  font-size: 0.88rem;
}
.post-series {
  margin: 0 0 28px;
  font-size: 0.9rem;
}
.post-series a { color: var(--accent-2); text-decoration: none; font-weight: 600; }
.post-series a:hover { color: var(--text); }

.post-toc {
  margin: 0 0 32px;
  padding: 18px 20px;
  border-radius: 14px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
}
.post-toc .lbl {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  color: var(--accent-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.post-toc ol {
  margin: 0;
  padding-left: 1.2em;
  color: var(--text-dim);
}
.post-toc a { color: var(--text); text-decoration: none; }
.post-toc a:hover { color: var(--accent-2); }

.post-related { margin: 48px 0 0; }
.post-related .lbl {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  color: var(--accent-2);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.post-related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
@media (min-width: 720px) { .post-related-grid { grid-template-columns: 1fr 1fr 1fr; } }
.post-related-grid a {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 16px 18px;
  transition: border-color 0.2s, transform 0.2s;
}
.post-related-grid a:hover { border-color: var(--accent); transform: translateY(-2px); }
.post-related-grid .ttl { font-weight: 600; font-size: 0.95rem; margin-bottom: 6px; }
.post-related-grid .ex { color: var(--text-dim); font-size: 0.85rem; }

.series-banners {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 0 0 28px;
}
@media (min-width: 720px) { .series-banners { grid-template-columns: 1fr 1fr; } }
.series-banner {
  display: block;
  text-decoration: none;
  color: inherit;
  margin: 0;
  padding: 20px 22px;
  border-radius: 16px;
  border: 1px solid rgba(52,211,153,0.28);
  background: rgba(52,211,153,0.07);
  transition: border-color 0.2s, transform 0.2s;
}
.series-banner:hover { border-color: rgba(52,211,153,0.5); transform: translateY(-2px); }
.series-banner.llm {
  border-color: rgba(91,140,255,0.28);
  background: rgba(91,140,255,0.07);
}
.series-banner.llm:hover { border-color: rgba(91,140,255,0.5); }
.series-banner .k {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  color: var(--accent-bio);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.series-banner.llm .k { color: var(--accent-2); }
.series-banner strong { display: block; margin: 6px 0 4px; font-size: 1.05rem; }
.series-banner span { color: var(--text-dim); font-size: 0.9rem; }

.series-group { margin-bottom: 40px; }
.series-group h2 {
  font-size: 1.15rem;
  margin: 0 0 14px;
  letter-spacing: -0.01em;
}
.series-group .blog-grid { padding-bottom: 0; }
@media (min-width: 880px) {
  .series-group .blog-grid { grid-template-columns: 1fr 1fr; }
}

.paper-row {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 12px;
  transition: transform 0.25s, border-color 0.25s;
}
.paper-row:hover { transform: translateY(-3px); border-color: rgba(120,160,255,0.4); }
.paper-kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: baseline;
  margin-bottom: 8px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
  color: var(--text-dim);
}
.paper-kicker .yr { color: var(--accent-2); }
.paper-row h2 {
  margin: 0 0 8px;
  font-size: 1.12rem;
  letter-spacing: -0.01em;
  line-height: 1.35;
}
.paper-row p { margin: 0; color: var(--text-dim); font-size: 0.92rem; }
.paper-row .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.paper-cite { color: var(--text-dim); font-size: 0.92rem; margin: 0 0 8px; }
.paper-ext {
  display: inline-block;
  margin: 0 0 20px;
  color: var(--accent-2);
  text-decoration: none;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
}
.paper-ext:hover { color: var(--text); }
#reading-grid { padding-bottom: 80px; }