:root {
  --bg: #0b0f1a;
  --bg-soft: #111827;
  --card: #151d2e;
  --text: #e5e9f0;
  --muted: #8b93a7;
  --accent: #22d3ee;
  --accent-2: #a78bfa;
  --border: #1f2a3d;
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, .logo {
  font-family: 'Space Grotesk', sans-serif;
  line-height: 1.2;
}

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

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(11, 15, 26, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
}
.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
}
.logo-dot { color: var(--accent); }
.main-nav { display: flex; gap: 24px; }
.main-nav a { color: var(--muted); font-weight: 500; }
.main-nav a:hover { color: var(--accent); text-decoration: none; }

/* Hero */
.hero {
  padding: 90px 0 60px;
  background:
    radial-gradient(600px 300px at 20% 0%, rgba(34, 211, 238, 0.12), transparent),
    radial-gradient(600px 300px at 80% 10%, rgba(167, 139, 250, 0.12), transparent);
}
.hero-tag {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  max-width: 16ch;
  margin-bottom: 20px;
}
.hero-sub {
  color: var(--muted);
  font-size: 1.15rem;
  max-width: 52ch;
}

/* Sections */
.section-title, .page-title {
  font-size: 1.8rem;
  margin: 48px 0 24px;
}
.page-title { margin-top: 56px; }

/* Post grid */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  padding-bottom: 70px;
}
.post-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.post-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}
.post-card a { color: inherit; }
.post-card a:hover { text-decoration: none; }
.post-card h3 { font-size: 1.25rem; margin-bottom: 10px; }
.post-card p { color: var(--muted); font-size: 0.95rem; margin-bottom: 14px; }
.post-meta { color: var(--accent-2); font-size: 0.85rem; }

/* Single post */
.post { padding: 56px 24px 80px; }
.post-header { margin-bottom: 36px; }
.post-header h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 14px; }
.post-content { max-width: 72ch; }
.post-content h2 {
  font-size: 1.5rem;
  margin: 40px 0 16px;
  color: var(--accent);
}
.post-content h3 { font-size: 1.2rem; margin: 28px 0 12px; }
.post-content p { margin-bottom: 18px; color: #cdd4e0; }
.post-content ul, .post-content ol { margin: 0 0 18px 24px; }
.post-content li { margin-bottom: 8px; }
.post-content strong { color: var(--text); }
.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 18px;
  color: var(--muted);
  font-style: italic;
  margin: 24px 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--muted);
  font-size: 0.9rem;
}
.footer-inner { text-align: center; }

@media (max-width: 640px) {
  .hero { padding: 60px 0 40px; }
  .main-nav { gap: 16px; }
}