:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --fg: #f1f5f9;
  --fg-muted: #94a3b8;
  --accent: #ef4444;
  --accent-hover: #dc2626;
  --border: #334155;
  --max-w: 760px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}

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

.site-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.site-header .logo {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--accent);
}
.site-header nav { margin-left: auto; display: flex; gap: 1.25rem; }
.site-header nav a { color: var(--fg); }
.site-header nav a.active { color: var(--accent); }

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.index-page h1 { font-size: 2rem; margin-bottom: 0.5rem; }
.index-page .lead { color: var(--fg-muted); margin-bottom: 2rem; }

.posts-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  transition: border-color .15s;
}
.post-card:hover { border-color: var(--accent); }
.post-link { display: block; color: inherit; text-decoration: none; }
.post-link:hover { text-decoration: none; }
.post-card h2 { margin: 0 0 0.25rem; font-size: 1.25rem; }
.post-date { color: var(--fg-muted); font-size: 0.875rem; margin: 0 0 0.5rem; }
.post-excerpt { margin: 0; }

.post-page article { margin-bottom: 3rem; }
.post-header h1 { font-size: 2rem; margin-bottom: 0.25rem; }
.post-body h2 { margin-top: 2rem; }
.post-body p { margin-bottom: 1rem; }
.post-body ul, .post-body ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.post-body code {
  background: var(--bg-card);
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-size: 0.875em;
}
.post-body pre {
  background: var(--bg-card);
  padding: 1rem;
  border-radius: 6px;
  overflow-x: auto;
}
.post-body blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  margin: 1.5rem 0;
  color: var(--fg-muted);
  font-style: italic;
}

.cta {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  text-align: center;
  margin-top: 3rem;
}
.cta h3 { margin: 0 0 0.5rem; }
.cta p { color: var(--fg-muted); margin: 0 0 1rem; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 0.625rem 1.25rem;
  border-radius: 6px;
  font-weight: 600;
}
.btn:hover { background: var(--accent-hover); color: white; text-decoration: none; }

.site-footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--fg-muted);
  border-top: 1px solid var(--border);
  font-size: 0.875rem;
}
.site-footer a { color: var(--fg-muted); }