:root{
  --bg: #ffffff;
  --text: #020202;
  --muted: #020202;
  --border: #000;
  --card: #fbfbfb;
  --link: #0000ff;
  --maxw: 760px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

a { color: var(--link); text-decoration: underline; }
a:hover { text-decoration: underline; }

/* ---------- Layout ---------- */
.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header.site-header {
  border-bottom: 1px solid var(--border);
  background: #fff;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 24px 18px;
}

.brand {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.brand h1 {
  margin: 0;
  font-size: 20px;
  letter-spacing: 0.2px;
}

.brand nav a {
  font-size: 14px;
  color: var(--muted);
  margin-left: 12px;
}

main {
  flex: 1;
}

/* ---------- Post ---------- */
article.post {
  padding-top: 10px;
}

.post-title {
  margin: 18px 0 8px 0;
  font-size: 32px;
  line-height: 1.15;
  letter-spacing: -0.3px;
}

.post-meta {
  margin: 0 0 20px 0;
  color: var(--muted);
  font-size: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.tag {
  display: inline-block;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  font-size: 13px;
  color: var(--muted);
}

.hero {
  margin: 18px 0 24px 0;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: linear-gradient(135deg, #f6f6f6, #ffffff);
}

.hero-inner {
  padding: 18px;
}

.hero h2 {
  margin: 0 0 14px 0;
  font-size: 18px;
}

.hero p {
  margin: 0;
  margin-bottom: 14px;
  color: var(--muted);
}

.content p { margin: 0 0 14px 0; }

.content h2 {
  margin: 28px 0 10px 0;
  font-size: 22px;
  line-height: 1.25;
}

.content h3 {
  margin: 22px 0 8px 0;
  font-size: 18px;
  line-height: 1.3;
}

.content ul, .content ol {
  margin: 0 0 14px 0;
  padding-left: 22px;
}

.content li { margin: 6px 0; }

blockquote {
  margin: 18px 0;
  padding: 14px 16px;
  border-left: 4px solid var(--border);
  background: var(--card);
  color: #2d2d2d;
  border-radius: 10px;
}

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 13px;
}

pre {
  margin: 18px 0;
  padding: 14px 14px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #0f172a;
  color: #e2e8f0;
  line-height: 1.55;
}

.callout {
  margin: 18px 0 26px 0;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
}

.callout strong {
  display: block;
  margin-bottom: 4px;
  font-size: 14px;
}

/* ---------- Footer ---------- */
footer.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
}

/* ---------- Small screens ---------- */
@media (max-width: 420px) {
  .container { padding: 18px 14px; }
  .brand nav a { margin-left: 10px; }
  .post-title { margin-top: 12px; }
}