:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #666;
  --accent: #0b5cad;
  --border: #e6e6e6;
  --header-bg: #0f172a;
  --header-fg: #ffffff;
}

* { box-sizing: border-box; }

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

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: var(--header-bg);
  color: var(--header-fg);
  padding: 14px 0;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.brand {
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.5px;
}

.nav a {
  color: #cfd8e6;
  text-decoration: none;
  margin-left: 16px;
  font-size: 0.95rem;
}

.nav a:hover { color: #fff; }

main.container {
  padding-top: 28px;
  padding-bottom: 40px;
  min-height: 60vh;
}

.page-title {
  font-size: 1.6rem;
  margin: 0 0 22px;
  border-bottom: 3px solid var(--accent);
  padding-bottom: 10px;
  display: inline-block;
}

.posts { display: flex; flex-direction: column; gap: 22px; }

.post-card {
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
}

.post-card h2 {
  margin: 0 0 6px;
  font-size: 1.3rem;
  line-height: 1.3;
}

.post-card h2 a { color: var(--fg); text-decoration: none; }
.post-card h2 a:hover { color: var(--accent); }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 8px;
}

.meta .category {
  background: #eef4fc;
  color: var(--accent);
  padding: 1px 8px;
  border-radius: 10px;
  font-size: 0.8rem;
}

.summary { margin: 0; color: #333; }

.post-title { font-size: 1.8rem; margin: 0 0 10px; }

.post .meta { margin-bottom: 16px; }

.content { font-size: 1.05rem; }
.content p { margin: 0 0 14px; }

.src-link a { color: var(--accent); }

.site-footer {
  background: var(--header-bg);
  color: #9fb0c3;
  padding: 18px 0;
  font-size: 0.85rem;
  margin-top: 40px;
}

.site-footer p { margin: 0; }

.pagination { margin-top: 26px; }
.pagination a { color: var(--accent); text-decoration: none; margin-right: 12px; }