/* ===========================================================
   VirtualCoreX — Blog stylesheet (shared by /blog/ index + posts)
   Mirrors the homepage design system (dark, premium, tech).
   =========================================================== */
:root{
  --base:#0A0E14; --base-2:#0C121C; --panel:#111824; --panel-2:#0E141F;
  --line:#1E2A3B; --line-2:#27374D; --steel:#8A97A8; --steel-dim:#5E6B7D;
  --white:#EDF2F7; --blue:#2E8BFF; --cyan:#38E1FF;
  --glow:rgba(56,225,255,.45); --blue-glow:rgba(46,139,255,.35);
  --r:14px; --maxw:1180px; --prosew:760px; --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--base); color:var(--white);
  font-family:"IBM Plex Sans",system-ui,sans-serif; font-size:17px; line-height:1.7;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(900px 600px at 78% -5%, var(--blue-glow), transparent 60%),
    radial-gradient(700px 500px at 8% 12%, rgba(56,225,255,.10), transparent 55%);
  opacity:.9;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}
h1,h2,h3,h4{font-family:"Space Grotesk",sans-serif;line-height:1.12;letter-spacing:-.02em;font-weight:600}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;position:relative;z-index:1}
.mono{font-family:"IBM Plex Mono",monospace}
.eyebrow{
  font-family:"IBM Plex Mono",monospace;font-size:12.5px;letter-spacing:.32em;
  text-transform:uppercase;color:var(--cyan);display:inline-flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,transparent,var(--cyan))}

/* skip link */
.skip-link{position:fixed;left:16px;top:12px;z-index:100;background:var(--blue);color:#fff;padding:10px 16px;border-radius:8px;font-family:"IBM Plex Mono";font-size:13px;transform:translateY(-200%);transition:transform .2s var(--ease)}
.skip-link:focus{transform:translateY(0)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:10px;font-family:"IBM Plex Mono",monospace;font-size:14px;font-weight:500;letter-spacing:.02em;padding:13px 22px;border-radius:10px;cursor:pointer;border:1px solid transparent;transition:transform .2s var(--ease),box-shadow .25s var(--ease),background .2s,border-color .2s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--blue),#1E6FE0);color:#fff;box-shadow:0 0 0 1px rgba(56,225,255,.25),0 12px 34px -14px var(--blue-glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 0 1px var(--glow),0 18px 40px -14px var(--blue-glow)}
.btn-ghost{background:rgba(255,255,255,.02);border-color:var(--line-2);color:var(--white)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.btn .arw{transition:transform .2s var(--ease)}
.btn:hover .arw{transform:translateX(3px)}

/* nav (matches homepage) */
header.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(10,14,20,.82);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:74px;gap:24px}
.brand{display:flex;align-items:center;gap:12px;font-family:"Space Grotesk";font-weight:600;font-size:19px;letter-spacing:-.01em}
.brand-mark{width:40px;height:40px;flex:0 0 auto;filter:drop-shadow(0 0 10px rgba(56,225,255,.45));transition:transform .5s var(--ease)}
.brand:hover .brand-mark{transform:rotate(60deg)}
.brand .x{color:var(--cyan)}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{font-size:14.5px;color:var(--steel);transition:color .2s;position:relative}
.nav-links a:hover,.nav-links a.active{color:var(--white)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-6px;height:1px;width:0;background:var(--cyan);transition:width .25s var(--ease)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;background:none;border:1px solid var(--line-2);border-radius:8px;width:44px;height:44px;cursor:pointer;color:var(--white)}
.nav-toggle svg{margin:auto}

/* ---------- Blog index ---------- */
.blog-hero{padding:72px 0 40px}
.blog-hero h1{font-size:clamp(34px,5.4vw,56px);margin:22px 0 0}
.blog-hero .lede{color:var(--steel);max-width:60ch;font-size:18px;margin-top:18px}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:24px 0 100px}
.post-card{display:flex;flex-direction:column;background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:transform .3s var(--ease),border-color .3s,box-shadow .3s}
.post-card:hover{transform:translateY(-5px);border-color:var(--line-2);box-shadow:0 24px 50px -28px rgba(0,0,0,.9)}
.post-card .thumb{aspect-ratio:16/9;width:100%;object-fit:cover;border-bottom:1px solid var(--line)}
.post-card .pc-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card .pc-meta{font-family:"IBM Plex Mono";font-size:11.5px;letter-spacing:.06em;color:var(--steel-dim);text-transform:uppercase}
.post-card h2{font-size:20px;line-height:1.25}
.post-card p{color:var(--steel);font-size:14.5px;flex:1}
.post-card .pc-more{font-family:"IBM Plex Mono";font-size:13px;color:var(--cyan);display:inline-flex;gap:8px;align-items:center}
.tag{display:inline-block;font-family:"IBM Plex Mono";font-size:11px;letter-spacing:.04em;color:var(--cyan);border:1px solid var(--line-2);border-radius:999px;padding:3px 10px}
.blog-empty{border:1px dashed var(--line-2);border-radius:var(--r);padding:60px 30px;text-align:center;color:var(--steel);background:var(--panel-2)}

/* ---------- Article ---------- */
.article-head{padding:54px 0 30px}
.crumbs{font-family:"IBM Plex Mono";font-size:12.5px;color:var(--steel-dim);margin-bottom:20px}
.crumbs a{color:var(--steel)}
.crumbs a:hover{color:var(--cyan)}
.article-head h1{font-size:clamp(30px,4.6vw,48px);max-width:20ch;margin:14px 0 0}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:22px;font-family:"IBM Plex Mono";font-size:12.5px;color:var(--steel-dim);letter-spacing:.03em;align-items:center}
.article-meta .dot{width:5px;height:5px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--glow)}
.hero-figure{margin:8px 0 0}
.hero-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border:1px solid var(--line-2);border-radius:var(--r)}
.hero-figure figcaption{font-family:"IBM Plex Mono";font-size:12px;color:var(--steel-dim);margin-top:10px;text-align:center}

.prose{max-width:var(--prosew);margin:0 auto;padding:6px 0 30px}
.prose>*{max-width:var(--prosew)}
.prose p{color:#C7D0DC;margin:0 0 20px}
.prose h2{font-size:clamp(23px,3vw,30px);margin:46px 0 16px;padding-top:6px}
.prose h3{font-size:20px;margin:32px 0 12px;color:var(--white)}
.prose a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(56,225,255,.4)}
.prose a:hover{text-decoration-color:var(--cyan)}
.prose strong{color:var(--white);font-weight:600}
.prose ul,.prose ol{margin:0 0 22px;padding-left:22px;color:#C7D0DC;display:flex;flex-direction:column;gap:9px}
.prose li{padding-left:4px}
.prose ul li::marker{color:var(--cyan)}
.prose ol li::marker{color:var(--cyan);font-family:"IBM Plex Mono"}
.prose blockquote{margin:26px 0;padding:14px 22px;border-left:2px solid var(--cyan);background:var(--panel-2);border-radius:0 10px 10px 0;color:var(--steel)}
.prose figure{margin:30px 0}
.prose figure img{border:1px solid var(--line-2);border-radius:var(--r)}
.prose figcaption{font-family:"IBM Plex Mono";font-size:12px;color:var(--steel-dim);margin-top:10px;text-align:center}
.prose code{font-family:"IBM Plex Mono";font-size:.9em;background:var(--panel-2);border:1px solid var(--line);border-radius:6px;padding:1px 6px;color:var(--cyan)}
.prose hr{border:0;height:1px;background:linear-gradient(90deg,transparent,var(--line-2),transparent);margin:40px 0}
.key-takeaways{max-width:var(--prosew);margin:0 auto 10px;background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line);border-radius:var(--r);padding:24px 26px}
.key-takeaways h2{font-size:16px;margin:0 0 12px;color:var(--cyan);font-family:"IBM Plex Mono";letter-spacing:.06em;text-transform:uppercase}
.key-takeaways ul{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:8px;color:#C7D0DC}

/* CTA box at end of article */
.post-cta{max-width:var(--prosew);margin:40px auto 0;border:1px solid var(--line-2);border-radius:var(--r);padding:32px;background:radial-gradient(620px 320px at 0% 0%,var(--blue-glow),transparent 58%),linear-gradient(180deg,var(--panel),var(--panel-2))}
.post-cta h3{font-size:23px;margin-bottom:10px}
.post-cta p{color:var(--steel);margin-bottom:20px;max-width:60ch}
.post-cta .btn-row{display:flex;flex-wrap:wrap;gap:12px}
.author-line{max-width:var(--prosew);margin:34px auto 0;padding-top:22px;border-top:1px solid var(--line);display:flex;align-items:center;gap:14px;color:var(--steel);font-size:14px}
.author-line img{width:46px;height:46px;border-radius:50%;border:1px solid var(--line-2);object-fit:cover}
.author-line b{color:var(--white);font-weight:600;font-family:"Space Grotesk"}

/* footer (matches homepage) */
footer{border-top:1px solid var(--line);padding:56px 0 40px;position:relative;z-index:1;background:var(--base);margin-top:40px}
.foot-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;margin-bottom:42px}
.foot-logo img{width:168px;height:auto;filter:drop-shadow(0 0 16px rgba(46,139,255,.3))}
.foot-brand p{color:var(--steel);font-size:14.5px;max-width:38ch;margin-top:16px}
.foot-col h5{font-family:"IBM Plex Mono";font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--steel-dim);margin-bottom:16px}
.foot-col a{display:block;color:var(--steel);font-size:14.5px;margin-bottom:10px;transition:color .2s}
.foot-col a:hover{color:var(--cyan)}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;gap:18px;padding-top:26px;border-top:1px solid var(--line);flex-wrap:wrap}
.foot-bottom p{font-size:13px;color:var(--steel-dim);font-family:"IBM Plex Mono"}

/* responsive */
@media (max-width:980px){
  .post-grid{grid-template-columns:1fr 1fr}
  .foot-top{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:1080px){
  .nav-links{display:none}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:74px;left:0;right:0;background:rgba(10,14,20,.97);border-bottom:1px solid var(--line);padding:18px 24px;gap:6px;align-items:flex-start}
  .nav-links.open a{padding:12px 0;font-size:16px;width:100%;border-bottom:1px solid var(--line)}
  .nav-toggle{display:grid;place-items:center}
  .nav-cta .btn.hide-sm{display:none}
}
@media (max-width:680px){
  body{font-size:16px}
  .post-grid{grid-template-columns:1fr}
  .foot-top{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}