:root {
  --bg: #f7f5f1;
  --fg: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #0b6e4f;
  --card: #ffffff;
  --border: #e4e0d8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Noto Sans SC", system-ui, sans-serif;
  background: linear-gradient(180deg, #eef6f2 0%, var(--bg) 40%);
  color: var(--fg);
  line-height: 1.65;
  min-height: 100vh;
}

.site-header,
.site-footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.25rem 1.25rem;
}

.site-header a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

main {
  max-width: 720px;
  margin: 0 auto 3rem;
  padding: 1.5rem 1.25rem 2rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
}

h1, h2, h3 { line-height: 1.25; }
h1 { font-size: 1.75rem; }
a { color: var(--accent); }

.post-list { padding-left: 1.2rem; }
.post-list li { margin: 0.5rem 0; }

.md-fallback {
  white-space: pre-wrap;
  font-family: ui-monospace, monospace;
  font-size: 0.9rem;
}

.site-footer {
  color: var(--muted);
  font-size: 0.9rem;
}