:root {
  --bg: #0f172a;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --border: #1f2937;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0,0,0,0.25);
  --max: 920px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(56,189,248,0.08), transparent 30%),
              radial-gradient(circle at 80% 0%, rgba(94,234,212,0.08), transparent 25%),
              var(--bg);
  color: var(--text);
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.2rem; }

.site-header { border-bottom: 1px solid var(--border); backdrop-filter: blur(6px); position: sticky; top: 0; z-index: 5; background: rgba(15,23,42,0.85); }
.site-header .wrap { display: flex; align-items: center; gap: 1rem; padding: 1rem 1.2rem; }
.brand a { color: var(--text); text-decoration: none; font-weight: 700; }
.brand .muted { color: var(--muted); font-size: 0.9rem; }
.nav { margin-left: auto; display: flex; gap: 1rem; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.nav a:hover { color: var(--accent); }

main.wrap { padding: 1.5rem 1.2rem 2.4rem; display: flex; flex-direction: column; gap: 1.5rem; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; }

.card {
  background: linear-gradient(135deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.3rem;
  box-shadow: var(--shadow);
}
.card.full { grid-column: 1 / -1; }

.meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 0.5rem; }
.summary { color: var(--text); line-height: 1.6; }
.summary p { margin: 0 0 0.6rem 0; }
.more { display: inline-flex; align-items: center; gap: 0.25rem; color: var(--accent); text-decoration: none; font-weight: 600; margin-top: 0.6rem; }
.more:hover { text-decoration: underline; }

.intro, .content { line-height: 1.7; }
.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.6rem 0 1rem; }
.tags a { padding: 0.2rem 0.7rem; border-radius: 999px; border: 1px solid var(--border); color: var(--text); text-decoration: none; background: rgba(56,189,248,0.08); }

.home-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.home-tags a { border: 1px solid var(--border); padding: 0.25rem 0.65rem; border-radius: 999px; color: var(--text); text-decoration: none; }
.home-tags a:hover { border-color: var(--accent); color: var(--accent); }

.site-footer { border-top: 1px solid var(--border); padding: 1.2rem 0 2rem; color: var(--muted); font-size: 0.9rem; }

pre, code { font-family: 'JetBrains Mono', 'Fira Code', SFMono-Regular, Menlo, monospace; }
pre { background: #0b1224; padding: 1rem; border-radius: 10px; border: 1px solid var(--border); overflow-x: auto; }

@media (max-width: 720px) {
  .nav { display: none; }
  .grid { grid-template-columns: 1fr; }
  main.wrap { padding: 1rem 1rem 2rem; }
}