:root{
    --bg: #0b1020;
    --bg-soft: #121a2b;
    --card: #0f1626;
    --text: #e6e7ea;
    --muted: #9aa3b2;
    --primary: #3ee6a5;
    --primary-600: #2acb90;
    --chip: #19253a;
    --border: #1c2740;
  }
  
  html,body{background:var(--bg);color:var(--text)}
  
  .blog-hero{
    background: radial-gradient(1200px 400px at 50% -10%, #1a2d52 0%, rgba(26, 45, 82, 0) 60%),
                linear-gradient(180deg, rgba(20,26,44,0.8) 0%, rgba(11,16,32,0) 100%);
    border-bottom: 1px solid var(--border);
  }
  .blog-hero h1{letter-spacing:-0.02em}
  .blog-hero .sub{color:var(--muted)}
  
  .chip{display:inline-flex;align-items:center;gap:.5rem;padding:.35rem .7rem;border-radius:999px;background:var(--chip);color:var(--text);border:1px solid var(--border);font-size:.825rem;max-width:100%;overflow-wrap:anywhere}
  .chip.active{background:rgba(62,230,165,.12);border-color:var(--primary);color:var(--primary)}
  .chip:hover{border-color:var(--primary);color:var(--primary)}
  
  .search-wrap{position:relative}
  .search-wrap input{width:100%;background:var(--bg-soft);border:1px solid var(--border);border-radius:.75rem;padding:.9rem 1rem  .9rem 2.6rem;color:var(--text)}
  .search-wrap svg{position:absolute;left:.8rem;top:50%;transform:translateY(-50%);color:var(--muted)}
  .search-wrap button{background:var(--primary);color:#061016;border-radius:.6rem;padding:.7rem 1rem;border:none}
  .search-wrap button:hover{background:var(--primary-600)}
  
  .grid-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.2rem;align-items:stretch}
  
  .card{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0) 60%), var(--card);border:1px solid var(--border);border-radius:1rem;padding:1.1rem;transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;display:flex;flex-direction:column;height:100%}
  .card:hover{transform:translateY(-2px);border-color:#274267;box-shadow:0 10px 30px rgba(0,0,0,.25)}
  .card h2{font-size:1.2rem;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .card .meta{display:flex;gap:.7rem;align-items:center;color:var(--muted);font-size:.85rem;margin-top:.35rem}
  .card .intro{color:#d7d9de;margin-top:.75rem;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
  .post-card{margin-bottom:2rem}
  .post-card img{width:100%;aspect-ratio:16/9;height:auto;object-fit:cover}
  .card .actions{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center;margin-top:auto}
  .link{color:var(--primary)}
  
  .pagination{display:flex;justify-content:center;align-items:center;gap:.5rem;margin-top:1.5rem}
  .page-btn{padding:.45rem .8rem;border-radius:.5rem;border:1px solid var(--border);background:var(--bg-soft);color:var(--text)}
  .page-btn:hover{border-color:var(--primary);color:var(--primary)}
  
  .post-hero{padding:2rem 0 3rem;border-bottom:1px solid var(--border);background:radial-gradient(1200px 400px at 50% -10%, #1a2d52 0%, rgba(26, 45, 82, 0) 60%)}
  .post-hero h1{letter-spacing:-0.02em;line-height:1.15;margin:0}
  .post-heading{max-width:860px;margin:3rem auto 0}
  .post-lede{color:var(--muted);font-size:1.2rem;line-height:1.6;margin-top:1rem;max-width:42rem}
  .post-meta{display:flex;gap:1rem;align-items:center;color:var(--muted);margin-top:1.25rem;font-size:.95rem;flex-wrap:wrap}
  
  .content{max-width:860px;margin:0 auto;padding:2.5rem 0 3rem}
  .featured-image{margin-bottom:1.5rem}
  .content img{border-radius:.5rem}
  .content h2,.content h3{scroll-margin-top:90px}
  
  .post-sidebar{padding:2.5rem 0 2rem}
  @media (min-width:1024px){.post-sidebar{position:sticky;top:1.5rem;max-height:calc(100vh - 3rem);overflow-y:auto}}
  .toc{border-left:1px solid var(--border);padding-left:1rem;color:var(--muted);font-size:.9rem}
  .toc-heading{color:var(--text);font-weight:600;margin-bottom:.5rem}
  .toc a{display:block;color:var(--muted);padding:.2rem 0 .2rem calc(1rem - 1px);margin-left:calc(-1rem - 1px);border-left:2px solid transparent;transition:color .15s ease,border-color .15s ease,background-color .15s ease}
  .toc a{border-radius:0 .35rem .35rem 0}
  .toc a:hover{color:var(--text);background:rgba(255,255,255,.04);border-left-color:#3a4a6a}
  .toc a.active{color:var(--primary);border-left-color:var(--primary);font-weight:600}
  .toc a.active:hover{background:rgba(62,230,165,.08);border-left-color:var(--primary)}
  
  .progress{position:fixed;left:0;top:0;height:3px;background:linear-gradient(90deg,var(--primary),#6ff3c5);width:0;z-index:1000}
  
  .share{display:flex;gap:.6rem;align-items:center}
  .share a,.share button{border:1px solid var(--border);background:var(--bg-soft);color:var(--text);border-radius:.5rem;display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;position:relative}
  .share a:hover,.share button:hover{border-color:var(--primary);color:var(--primary)}
  .share svg{width:18px;height:18px}
  .share button.copied::after{content:'Copied!';position:absolute;top:-28px;background:var(--bg-soft);border:1px solid var(--border);padding:.2rem .4rem;border-radius:.35rem;font-size:.75rem;white-space:nowrap}
  
  .content a[href^="http"]:not([href*="chatexpense.com"]),
  .prose a[href^="http"]:not([href*="chatexpense.com"]),
  .rich-text a[href^="http"]:not([href*="chatexpense.com"]),
  .card .intro a[href^="http"]:not([href*="chatexpense.com"]) {
    color: #56ccf0;
    text-decoration: underline;
  }
  
  .prose{max-width:44rem;font-size:1.125rem;line-height:1.75;color:#d5d9e0}
  .prose > :first-child{margin-top:0}
  .prose p{margin:0 0 1.25rem}
  .prose h2{font-size:1.75rem;font-weight:700;line-height:1.3;color:var(--text);margin:3rem 0 1rem;letter-spacing:-0.01em}
  .prose h3{font-size:1.3rem;font-weight:600;line-height:1.35;color:var(--text);margin:2.25rem 0 .75rem}
  .prose strong{color:var(--text)}
  .prose a{color:var(--primary);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
  .prose a:hover{color:#6ff3c5}
  .prose ul,.prose ol{padding-left:1.5rem;margin:0 0 1.25rem}
  .prose ul{list-style:disc}
  .prose ol{list-style:decimal}
  .prose li{margin-bottom:.5rem;padding-left:.25rem}
  .prose li::marker{color:var(--primary)}
  .prose blockquote{border-left:3px solid var(--primary);padding-left:1rem;color:var(--muted);margin:1.5rem 0}
  .prose hr{border:0;border-top:1px solid var(--border);margin:2.5rem 0}
  .prose img{max-width:100%;height:auto}
  .prose table{width:100%;border-collapse:collapse;margin:1.5rem 0 2rem;font-size:1rem}
  .prose th,.prose td{border:1px solid var(--border);padding:.6rem .8rem;text-align:left;vertical-align:top}
  .prose th{background:var(--bg-soft);color:var(--text)}
  .prose tbody tr:nth-child(even){background:rgba(255,255,255,.02)}
  @media (max-width:640px){
    .prose{font-size:1.0625rem}
    .prose h2{font-size:1.5rem;margin-top:2.5rem}
    .prose table{display:block;overflow-x:auto;font-size:.9rem}
  }
  .post-image{margin:1rem 0}
  .callout{padding:.9rem 1rem;border-radius:.5rem;margin:1rem 0;border:1px solid transparent}
  .callout-info{background:#f4f8ff;border-color:#d9e6ff;color:#0b2540}
  .callout-tip{background:#f6fff4;border-color:#dff4de;color:#0f3312}
  .callout-warn{background:#fff8f4;border-color:#ffe0d3;color:#5a2a12}

  .post-cta{margin:3.5rem 0 0;padding:1.75rem;border:1px solid rgba(62,230,165,.35);border-radius:1rem;background:linear-gradient(135deg,rgba(62,230,165,.10),rgba(26,45,82,.35))}
  .prose .post-cta h2{margin:0 0 .5rem;font-size:1.4rem}
  .prose .post-cta p{margin:0 0 1.25rem;color:#d5d9e0}
  .prose .post-cta-button{display:inline-block;background:var(--primary);color:#061016;font-weight:700;text-decoration:none;padding:.7rem 1.4rem;border-radius:.6rem}
  .prose .post-cta-button:hover{background:var(--primary-600);color:#061016}

  .keep-reading{margin-top:3.5rem;padding-top:2rem;border-top:1px solid var(--border)}
  .prose .keep-reading h2{margin:0 0 1.25rem;font-size:1.4rem}
  .keep-reading-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}
  .prose .keep-reading-card{display:flex;flex-direction:column;gap:.5rem;padding:1.1rem;border:1px solid var(--border);border-radius:.75rem;background:var(--card);text-decoration:none;color:var(--text);transition:border-color .2s ease,transform .2s ease}
  .prose .keep-reading-card:hover{border-color:var(--primary);transform:translateY(-2px);color:var(--text)}
  .keep-reading-title{font-weight:600;line-height:1.35;font-size:1.05rem}
  .keep-reading-intro{color:var(--muted);font-size:.9rem;line-height:1.5;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
  .keep-reading-meta{color:var(--primary);font-size:.8rem;margin-top:auto}

  .footer-links{display:flex;justify-content:center;gap:1.5rem;margin-bottom:.5rem}
  .footer-links a:hover{color:var(--primary)}