:root {
  --bg-primary:#0a0a0b; --bg-secondary:#111113; --bg-tertiary:#18181b;
  --bg-elevated:#1e1e22; --border:#27272a; --border-focus:#3f3f46;
  --text-primary:#fafafa; --text-secondary:#a1a1aa; --text-tertiary:#71717a;
  --accent:#22d3ee; --accent-dim:rgba(34,211,238,0.12);
  --green:#4ade80; --green-dim:rgba(74,222,128,0.12);
  --orange:#fb923c; --red:#f87171;
  --font-mono:'JetBrains Mono','SF Mono','Fira Code',monospace;
  --font-sans:'Outfit',-apple-system,BlinkMacSystemFont,sans-serif;
  --radius:8px; --radius-lg:12px;
}
html.light {
  --bg-primary:#fafafa; --bg-secondary:#f4f4f5; --bg-tertiary:#e4e4e7;
  --bg-elevated:#fff; --border:#d4d4d8; --border-focus:#a1a1aa;
  --text-primary:#09090b; --text-secondary:#52525b; --text-tertiary:#a1a1aa;
  --accent:#0891b2; --accent-dim:rgba(8,145,178,0.08);
  --green:#16a34a; --green-dim:rgba(22,163,74,0.08);
  --orange:#ea580c; --red:#dc2626;
}
*{margin:0;padding:0;box-sizing:border-box}
body{background:var(--bg-primary);color:var(--text-primary);font-family:var(--font-sans);min-height:100vh;display:flex;flex-direction:column;transition:background .3s,color .3s}
body::before{content:'';position:fixed;inset:0;background-image:linear-gradient(var(--border) 1px,transparent 1px),linear-gradient(90deg,var(--border) 1px,transparent 1px);background-size:60px 60px;opacity:.3;pointer-events:none;z-index:0}
.container{max-width:760px;margin:0 auto;padding:0 24px;width:100%;position:relative;z-index:1}

/* Header */
header{padding:24px 0}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:flex;align-items:baseline;text-decoration:none}
.logo-name{font-family:var(--font-mono);font-size:20px;font-weight:700;color:var(--text-primary);letter-spacing:-.5px}
.logo-tld{color:var(--accent)}
.header-actions{display:flex;align-items:center;gap:8px}
.icon-btn{width:36px;height:36px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-secondary);color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s;font-size:16px;line-height:1}
.icon-btn:hover{border-color:var(--border-focus);color:var(--text-primary);background:var(--bg-tertiary)}

/* Breadcrumb */
.breadcrumb{display:flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:12px;color:var(--text-tertiary);margin-bottom:28px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-tertiary);text-decoration:none;transition:color .15s}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb-sep{color:var(--border-focus)}

/* Article */
.article{padding:0 0 48px}
.article-meta{display:flex;gap:12px;align-items:center;margin-bottom:20px;flex-wrap:wrap}
.article-tag{font-family:var(--font-mono);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.8px;color:var(--accent);background:var(--accent-dim);border:1px solid var(--accent);padding:3px 8px;border-radius:4px}
.article-read-time{font-family:var(--font-mono);font-size:11px;color:var(--text-tertiary)}
h1{font-family:var(--font-sans);font-size:32px;font-weight:700;line-height:1.25;color:var(--text-primary);margin-bottom:16px;letter-spacing:-.5px}
.lead{font-size:17px;line-height:1.7;color:var(--text-secondary);margin-bottom:32px;border-left:3px solid var(--accent);padding-left:16px}
h2{font-family:var(--font-sans);font-size:21px;font-weight:600;color:var(--text-primary);margin:36px 0 12px;padding-top:4px}
h2:first-of-type{margin-top:0}
h3{font-family:var(--font-sans);font-size:16px;font-weight:600;color:var(--text-primary);margin:24px 0 8px}
p{font-size:15px;line-height:1.75;color:var(--text-secondary);margin-bottom:14px}
code{font-family:var(--font-mono);font-size:13px;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:4px;padding:2px 6px;color:var(--accent)}
pre{background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius);padding:20px;overflow-x:auto;margin:12px 0 20px;font-family:var(--font-mono);font-size:13px;line-height:1.65;color:var(--text-primary)}
pre code{background:none;border:none;padding:0;font-size:inherit;color:inherit}
ul,ol{padding-left:20px;margin-bottom:14px}
li{font-size:15px;line-height:1.75;color:var(--text-secondary);margin-bottom:4px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
hr{border:none;border-top:1px solid var(--border);margin:36px 0}

/* Tip box */
.tip{background:var(--accent-dim);border:1px solid var(--accent);border-radius:var(--radius);padding:14px 16px;margin:20px 0}
.tip p{margin:0;font-size:14px;color:var(--text-primary)}
.tip strong{color:var(--accent)}

/* Warning box */
.warn{background:rgba(251,146,60,.1);border:1px solid var(--orange);border-radius:var(--radius);padding:14px 16px;margin:20px 0}
.warn p{margin:0;font-size:14px;color:var(--text-primary)}
.warn strong{color:var(--orange)}

/* CTA box */
.cta-box{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;text-align:center;margin:40px 0}
.cta-box h3{font-size:18px;margin:0 0 8px;color:var(--text-primary)}
.cta-box p{font-size:14px;color:var(--text-secondary);margin:0 0 16px}
.cta-btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#000;font-family:var(--font-mono);font-size:14px;font-weight:600;padding:10px 24px;border-radius:var(--radius);text-decoration:none;transition:opacity .15s}
.cta-btn:hover{opacity:.85;text-decoration:none}

/* Table of contents */
.toc{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;margin-bottom:32px}
.toc-title{font-family:var(--font-mono);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.8px;color:var(--text-tertiary);margin-bottom:10px}
.toc ol{margin:0;padding-left:18px}
.toc li{margin-bottom:4px}
.toc a{font-size:14px;color:var(--text-secondary)}
.toc a:hover{color:var(--accent)}

/* Footer */
footer{margin-top:auto;padding:24px 0 20px;border-top:1px solid var(--border)}
.footer-row{display:flex;align-items:center;justify-content:space-between;font-family:var(--font-mono);font-size:11px;color:var(--text-tertiary)}
.footer-links{display:flex;gap:16px}
.footer-links a{color:var(--text-tertiary);text-decoration:none;transition:color .15s}
.footer-links a:hover{color:var(--text-secondary)}

/* Articles listing */
.articles-grid{display:flex;flex-direction:column;gap:20px;margin-top:8px}
.article-card{display:flex;flex-direction:column;gap:6px;padding:20px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);text-decoration:none;transition:border-color .15s,background .15s}
.article-card:hover{border-color:var(--border-focus);background:var(--bg-tertiary);text-decoration:none}
.article-card-tag{font-family:var(--font-mono);font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.8px;color:var(--accent)}
.article-card-title{font-size:16px;font-weight:600;color:var(--text-primary);line-height:1.3}
.article-card-desc{font-size:13px;color:var(--text-tertiary);line-height:1.5}
.section-heading{font-family:var(--font-mono);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.8px;color:var(--text-tertiary);margin:32px 0 12px;padding-bottom:8px;border-bottom:1px solid var(--border)}

@media(max-width:640px){
  .container{padding:0 16px}
  h1{font-size:26px}
  h2{font-size:19px}
  pre{font-size:12px;padding:14px}
  .footer-row{flex-direction:column;gap:8px;text-align:center}
  .cta-box{padding:20px}
}