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

:root {
  --bg-deep: #06060a;
  --bg-surface: #0c0c12;
  --bg-card: #111118;
  --bg-elevated: #16161f;
  --border-subtle: rgba(255,255,255,0.06);
  --border-medium: rgba(255,255,255,0.1);
  --text-primary: #e8e8ef;
  --text-secondary: #a0a0b8;
  --text-muted: #8080a0;
  --violet-raw: 139, 92, 246;
  --violet: rgb(var(--violet-raw));
  --violet-dim: rgba(var(--violet-raw), 0.15);
  --teal-raw: 45, 212, 191;
  --teal: rgb(var(--teal-raw));
  --teal-dim: rgba(var(--teal-raw), 0.12);
  --rose: #f43f5e;
  --amber: #f59e0b;
  --emerald: #10b981;
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 24px;
  background: rgba(6, 6, 10, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}
.nav-inner {
  max-width: 800px;
  margin: 0 auto;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}
.nav-logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--violet), var(--teal));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 11px;
  color: white;
}
.nav-logo-text {
  font-family: 'Instrument Serif', serif;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  gap: 20px;
  list-style: none;
  align-items: center;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-primary); }
.btn-sm {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: 7px;
  font-size: 12px;
  font-weight: 700;
  background: #fff;
  color: #111;
  text-decoration: none;
  transition: all 0.2s;
}
.btn-sm:hover { background: #e8e8ef; transform: translateY(-1px); }

/* Article */
.article-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 24px 80px;
}
.article-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  gap: 16px;
  align-items: center;
}
.article-meta .tag {
  background: var(--violet-dim);
  color: var(--violet);
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
h1 {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  font-weight: 400;
}
h2 {
  font-family: 'DM Sans', sans-serif;
  font-size: 24px;
  font-weight: 700;
  margin: 48px 0 16px;
  color: var(--text-primary);
}
h3 {
  font-family: 'DM Sans', sans-serif;
  font-size: 19px;
  font-weight: 600;
  margin: 32px 0 12px;
  color: var(--text-primary);
}
p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 16px;
}
.lead {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}

/* Lists */
ul, ol {
  color: var(--text-secondary);
  margin: 0 0 20px 24px;
  font-size: 16px;
}
li { margin-bottom: 8px; }

/* Code */
code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  background: var(--bg-elevated);
  padding: 2px 7px;
  border-radius: 5px;
  color: var(--teal);
}
pre {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 20px 24px;
  overflow-x: auto;
  margin: 20px 0 24px;
}
pre code {
  background: none;
  padding: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0 28px;
  font-size: 14px;
}
th {
  text-align: left;
  padding: 10px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 13px;
}
td {
  padding: 10px 16px;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

/* Callout boxes */
.callout {
  padding: 20px 24px;
  border-radius: 12px;
  margin: 24px 0;
  border-left: 3px solid;
}
.callout-info {
  background: rgba(var(--violet-raw), 0.06);
  border-color: var(--violet);
}
.callout-warning {
  background: rgba(245, 158, 11, 0.06);
  border-color: var(--amber);
}
.callout-tip {
  background: rgba(var(--teal-raw), 0.06);
  border-color: var(--teal);
}
.callout p:last-child { margin-bottom: 0; }
.callout strong { color: var(--text-primary); }

/* CTA box */
.cta-box {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  margin: 48px 0;
}
.cta-box h3 {
  font-family: 'Instrument Serif', serif;
  font-size: 24px;
  margin: 0 0 8px;
  font-weight: 400;
}
.cta-box p { margin-bottom: 20px; }
.cta-box .btn-sm { padding: 10px 28px; font-size: 14px; }

/* Images */
img {
  max-width: 100%;
  border-radius: 12px;
  margin: 24px 0;
}

/* Blockquote */
blockquote {
  border-left: 3px solid var(--violet);
  padding: 12px 24px;
  margin: 24px 0;
  background: rgba(var(--violet-raw), 0.04);
  border-radius: 0 12px 12px 0;
}
blockquote p { color: var(--text-secondary); margin: 0; font-style: italic; }

/* Blog index */
.blog-header {
  text-align: center;
  padding: 60px 24px 40px;
  max-width: 800px;
  margin: 0 auto;
}
.blog-header h1 { margin-bottom: 12px; }
.blog-header p { color: var(--text-muted); font-size: 16px; }

.blog-grid {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.blog-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 24px 28px;
  text-decoration: none;
  transition: all 0.25s;
}
.blog-card:hover {
  border-color: var(--border-medium);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.blog-card .card-tag {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--violet);
  margin-bottom: 6px;
}
.blog-card h2 {
  font-family: 'DM Sans', sans-serif;
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 6px;
  color: var(--text-primary);
}
.blog-card p {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

/* Footer */
.footer {
  padding: 32px 24px;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}
.footer a { color: var(--text-secondary); text-decoration: none; }
.footer a:hover { color: var(--text-primary); }

/* Related posts */
.related {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border-subtle);
}
.related h3 {
  font-size: 16px;
  margin-bottom: 16px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 11px;
}
.related-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.related-links a {
  color: var(--violet);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s;
}
.related-links a:hover { color: var(--teal); }

@media (max-width: 640px) {
  .nav-links { gap: 12px; }
  .article-container { padding: 40px 16px 60px; }
  h1 { font-size: 28px; }
  h2 { font-size: 20px; }
  pre { padding: 14px 16px; }
  table { font-size: 12px; }
  th, td { padding: 8px 10px; }
}