*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #0d0d0d;
  --bg-code:    #161616;
  --text:       #c9c9c9;
  --text-dim:   #777;
  --text-faint: #444;
  --accent:     #7ee787;
  --link:       #79c0ff;
  --border:     #222;

  --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: ui-monospace, 'SFMono-Regular', 'SF Mono', Menlo, Consolas,
          'Liberation Mono', monospace;
  --width: 700px;
  --radius: 4px;

  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:         #fafafa;
    --bg-code:    #f2f2f2;
    --text:       #1a1a1a;
    --text-dim:   #666;
    --text-faint: #aaa;
    --accent:     #1a7f37;
    --link:       #0550ae;
    --border:     #ddd;
    color-scheme: light;
  }
}

html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  max-width: var(--width);
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }

::selection { background: var(--accent); color: var(--bg); }

.site-header {
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.site-title {
  font-family: var(--mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.03em;
}
.site-title:hover { color: var(--accent); text-decoration: none; }

.site-tagline {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

.back {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 2rem;
  transition: color 0.15s;
}
.back:hover { color: var(--accent); text-decoration: none; }

.post-entry {
  display: flex;
  gap: 1.5rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
}
.post-entry:first-child { padding-top: 0; }
.post-entry:last-child  { border-bottom: none; }

.post-entry time {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
}

.post-entry > div > a {
  font-weight: 500;
  font-size: 1.05rem;
}

.post-desc {
  font-size: 0.88rem;
  color: var(--text-dim);
  margin-top: 0.15rem;
  line-height: 1.5;
}

.empty {
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.9rem;
}

.tags { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 0.2rem; }
.tag  { font-family: var(--mono); font-size: 0.7rem; color: var(--text-faint); }
.tag::before { content: '#'; }

.post h1 {
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.025em;
  margin-bottom: 0.5rem;
}

.post-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.toc {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-code);
  padding: 1rem 1.25rem;
  margin-bottom: 2.5rem;
  font-size: 0.9rem;
}
.toc-title {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.6rem;
}
.toc ul { list-style: none; padding-left: 0; }
.toc li > ul { padding-left: 1.25rem; margin-top: 0.25rem; }
.toc li { margin-bottom: 0.3rem; line-height: 1.4; }
.toc li:last-child { margin-bottom: 0; }
.toc a { color: var(--text); }
.toc a:hover { color: var(--accent); text-decoration: none; }

.post-body h2 {
  font-size: 1.35rem;
  font-weight: 600;
  margin: 2.5rem 0 0.75rem;
  letter-spacing: -0.01em;
}
.post-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 2rem 0 0.5rem;
}
.post-body h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}
.post-body p  { margin-bottom: 1.25rem; }

.post-body ul,
.post-body ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}
.post-body li { margin-bottom: 0.3rem; }
.post-body li > ul,
.post-body li > ol { margin-top: 0.3rem; margin-bottom: 0; }

.post-body strong { font-weight: 600; }

.post-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.1rem 0 0.1rem 1.25rem;
  color: var(--text-dim);
  margin: 1.5rem 0;
}
.post-body blockquote p:last-child { margin-bottom: 0; }

.post-body img {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 1rem 0;
}
.post-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

.post-body .callout {
  border-left: 3px solid var(--callout-accent);
  background: var(--callout-bg);
  padding: 0.85rem 1rem;
  margin: 1.5rem 0;
  border-radius: var(--radius);
}

.post-body .callout-title {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--callout-accent);
  margin-bottom: 0.4rem;
}

.post-body .callout-body > :first-child { margin-top: 0; }
.post-body .callout-body > :last-child  { margin-bottom: 0; }

.post-body .callout-info,
.post-body .callout-note { --callout-accent: #79c0ff; --callout-bg: rgba(56,139,253,0.10); }
.post-body .callout-warning { --callout-accent: #d29922; --callout-bg: rgba(187,128,9,0.10); }
.post-body .callout-critical { --callout-accent: #ff7b72; --callout-bg: rgba(248,81,73,0.10); }
.post-body .callout-tip { --callout-accent: #7ee787; --callout-bg: rgba(46,160,67,0.10); }

@media (prefers-color-scheme: light) {
  .post-body .callout-info,
  .post-body .callout-note { --callout-accent: #0969da; --callout-bg: rgba(9,105,218,0.07); }
  .post-body .callout-warning { --callout-accent: #9a6700; --callout-bg: rgba(154,103,0,0.08); }
  .post-body .callout-critical { --callout-accent: #cf222e; --callout-bg: rgba(207,34,46,0.07); }
  .post-body .callout-tip { --callout-accent: #1a7f37; --callout-bg: rgba(26,127,55,0.07); }
}

.post-body code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--bg-code);
  border: 1px solid var(--border);
  padding: 0.12em 0.35em;
  border-radius: 3px;
  word-break: break-word;
}

.post-body pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}

.post-body pre code {
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.65;
  background: none;
  border: none;
  padding: 0;
  border-radius: 0;
  word-break: normal;
}

.post-body pre code.hljs {
  background: transparent;
  padding: 0;
}

.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}
.post-body th,
.post-body td {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  text-align: left;
}
.post-body th {
  font-weight: 600;
  font-family: var(--mono);
  font-size: 0.85rem;
  background: var(--bg-code);
}

footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-faint);
}

@media (max-width: 600px) {
  body { padding: 2rem 1rem; }
  .post-entry { flex-direction: column; gap: 0.2rem; }
  .post h1 { font-size: 1.5rem; }
  .post-body pre { padding: 0.75rem 1rem; }
}