:root {
  --bg: #0f1115;
  --surface: #171a21;
  --surface-2: #1e222b;
  --text: #e7e9ee;
  --muted: #9aa3b2;
  --accent: #4f9cf9;
  --accent-2: #7c5cff;
  --border: #262b36;
  --radius: 14px;
  --maxw: 900px;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: saturate(140%) blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -0.02em;
}
.brand span { color: var(--accent); }
.nav-links a {
  color: var(--muted);
  margin-left: 22px;
  font-size: 0.95rem;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero {
  padding: 72px 0 48px;
  border-bottom: 1px solid var(--border);
}
.hero h1 {
  font-size: 2.6rem;
  line-height: 1.1;
  margin: 0 0 16px;
  letter-spacing: -0.03em;
  background: linear-gradient(90deg, var(--text), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p { font-size: 1.15rem; color: var(--muted); max-width: 640px; margin: 0; }

/* Sections */
section { padding: 48px 0; }
h2 { font-size: 1.6rem; letter-spacing: -0.02em; margin: 0 0 24px; }
h3 { font-size: 1.2rem; margin: 28px 0 10px; }

/* Post grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card .tag {
  display: inline-block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: rgba(79,156,249,0.1);
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.card h3 { margin: 0 0 8px; font-size: 1.1rem; }
.card h3 a { color: var(--text); }
.card p { color: var(--muted); font-size: 0.95rem; margin: 0 0 12px; }
.card .meta { font-size: 0.82rem; color: var(--muted); }

/* Article */
.article { padding: 48px 0 64px; }
.article-meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 8px; }
.article h1 { font-size: 2.1rem; letter-spacing: -0.02em; line-height: 1.15; margin: 0 0 20px; }
.article p, .article li { color: #d3d7e0; }
.article h2 { margin-top: 40px; }
.article ul, .article ol { padding-left: 22px; }
.article img { max-width: 100%; border-radius: var(--radius); }
.callout {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 14px 18px;
  border-radius: 8px;
  margin: 24px 0;
  color: var(--muted);
  font-size: 0.92rem;
}

/* Prose blocks */
.prose { max-width: 720px; }
.prose p { margin: 0 0 18px; }

/* Contact */
.contact-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer .cols {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.site-footer a { color: var(--muted); margin-right: 16px; }
.site-footer a:hover { color: var(--text); }

@media (max-width: 600px) {
  .hero h1 { font-size: 2rem; }
  .nav-links a { margin-left: 14px; font-size: 0.88rem; }
}