:root {
  --bg: #050810;
  --bg2: #0a0f1a;
  --card: #0f1628;
  --card-hover: #151d33;
  --border: #1a2340;
  --border-light: #253358;
  --accent: #8b5cf6;
  --accent-soft: rgba(139, 92, 246, 0.10);
  --teal: #a78bfa;
  --green: #10b981;
  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-dim: #64748b;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.blog-header {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}
.blog-header .logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: .5rem;
}
.blog-header .logo span { color: var(--accent); }
.blog-header nav a {
  color: var(--text-secondary);
  margin-left: 1.5rem;
  font-size: .9rem;
  font-weight: 500;
}
.blog-header nav a:hover { color: var(--text); text-decoration: none; }

/* Index page */
.blog-hero {
  text-align: center;
  padding: 4rem 2rem 2rem;
  max-width: 800px;
  margin: 0 auto;
}
.blog-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--accent), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.blog-hero p { color: var(--text-secondary); font-size: 1.1rem; }
.blog-grid {
  max-width: 900px;
  margin: 2rem auto 4rem;
  padding: 0 2rem;
  display: grid;
  gap: 1.5rem;
}
.blog-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem 2rem;
  transition: border-color .2s, transform .2s;
}
.blog-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.blog-card h2 { font-size: 1.25rem; margin-bottom: .5rem; }
.blog-card h2 a { color: var(--text); }
.blog-card h2 a:hover { color: var(--accent); text-decoration: none; }
.blog-card p { color: var(--text-secondary); font-size: .95rem; }
.blog-card .meta { color: var(--text-dim); font-size: .8rem; margin-top: .75rem; }

/* Article page */
.article-container {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 2rem 4rem;
}
.article-container h1 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 1rem;
}
.article-meta {
  color: var(--text-dim);
  font-size: .85rem;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.article-container h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
  color: var(--teal);
}
.article-container h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 1.5rem 0 .75rem;
}
.article-container p { margin-bottom: 1rem; color: var(--text-secondary); }
.article-container ul, .article-container ol {
  margin: 0 0 1rem 1.5rem;
  color: var(--text-secondary);
}
.article-container li { margin-bottom: .4rem; }
.article-container strong { color: var(--text); }
.cta-box {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 1.5rem 2rem;
  margin: 2rem 0;
  text-align: center;
}
.cta-box a {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: .75rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  margin-top: .75rem;
  transition: opacity .2s;
}
.cta-box a:hover { opacity: .85; text-decoration: none; }
.blog-footer {
  text-align: center;
  padding: 2rem;
  color: var(--text-dim);
  font-size: .85rem;
  border-top: 1px solid var(--border);
}
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}
th, td {
  padding: .6rem .8rem;
  border: 1px solid var(--border);
  text-align: left;
  color: var(--text-secondary);
  font-size: .9rem;
}
th { background: var(--bg2); color: var(--text); font-weight: 600; }
@media (max-width: 640px) {
  .blog-hero h1 { font-size: 1.8rem; }
  .article-container h1 { font-size: 1.5rem; }
  .blog-header { padding: .75rem 1rem; }
  .blog-header nav a { margin-left: 1rem; font-size: .8rem; }
  .article-container { padding: 2rem 1rem 3rem; }
}