/* ═══════════════════════════════════════════════════════
   ATIEMPPO — main.css
   Usado por: _layouts/default.html → blog + posts
   La landing (index.html) tiene su propio CSS embebido
   ═══════════════════════════════════════════════════════ */
:root{
  --bg:#060810;--surface:#0d1117;--surface2:#131a24;
  --border:rgba(0,200,255,0.12);--border2:rgba(255,255,255,0.07);
  --cyan:#00c8ff;--cyan-glow:rgba(0,200,255,0.08);
  --white:#eef2f7;--muted:#6b7a90;
  --display:'Bebas Neue',sans-serif;--body:'Outfit',sans-serif;--r:6px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--white);font-family:var(--body);font-weight:300;line-height:1.65;overflow-x:hidden}
::selection{background:var(--cyan);color:#000}
::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--cyan);border-radius:2px}
a{color:var(--cyan);text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:0 2rem}
.tag{display:inline-flex;align-items:center;gap:.5rem;font-size:.7rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);margin-bottom:1.2rem}
.tag::before{content:'';display:block;width:1.2rem;height:1px;background:var(--cyan)}

/* ── NAV ── */
#nav{position:fixed;top:0;left:0;right:0;z-index:200;display:flex;align-items:center;justify-content:space-between;padding:1.1rem 3rem;background:rgba(6,8,16,0.85);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);transition:background .3s}
#nav.scrolled{background:rgba(6,8,16,0.98);box-shadow:0 4px 30px rgba(0,0,0,.5)}
.nav-logo{font-family:var(--display);font-size:1.6rem;letter-spacing:.06em;color:var(--white);text-decoration:none;display:flex;align-items:center;gap:.5rem}
.nav-dot{width:8px;height:8px;background:var(--cyan);border-radius:50%;box-shadow:0 0 10px var(--cyan);animation:pulse 2s ease-in-out infinite;flex-shrink:0}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.7)}}
.nav-links{display:flex;gap:2rem;list-style:none;align-items:center}
.nav-links a{color:rgba(238,242,247,.55);font-size:.85rem;font-weight:400;letter-spacing:.03em;transition:color .2s;text-decoration:none}
.nav-links a:hover{color:var(--cyan)}
.nav-cta{background:var(--cyan)!important;color:#000!important;padding:.5rem 1.2rem!important;border-radius:var(--r)!important;font-weight:600!important;transition:box-shadow .2s,opacity .2s!important}
.nav-cta:hover{box-shadow:0 0 20px rgba(0,200,255,.4)!important;opacity:.9!important}
.nav-burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:.4rem}
.nav-burger span{width:22px;height:2px;background:var(--white);border-radius:2px;transition:.25s;display:block}
.nav-burger.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-burger.open span:nth-child(2){opacity:0}
.nav-burger.open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ── SITE MAIN ── */
.site-main{padding-top:72px;min-height:80vh}

/* ── REVEAL — Progressive Enhancement ── */
.reveal{transition:opacity .7s ease,transform .7s ease}
.js-ready .reveal{opacity:0;transform:translateY(24px)}
.js-ready .reveal.visible{opacity:1;transform:none}

/* ── BLOG PAGE HERO ── */
.blog-page-hero{padding:5rem 0 3rem;text-align:center;border-bottom:1px solid var(--border2);background:linear-gradient(180deg,var(--surface) 0%,var(--bg) 100%)}
.blog-page-tag{display:inline-flex;align-items:center;gap:.5rem;font-size:.7rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);margin-bottom:1rem}
.blog-page-tag::before{content:'';display:block;width:1.2rem;height:1px;background:var(--cyan)}
.blog-page-title{font-family:var(--display);font-size:clamp(2.8rem,6vw,5.5rem);letter-spacing:.04em;line-height:.95;margin-bottom:1.2rem}
.blog-page-sub{font-size:1rem;color:rgba(238,242,247,.55);max-width:520px;margin:0 auto}

/* ── BLOG LIST GRID ── */
.blog-page-main{padding:4rem 0 6rem}
.blog-list-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:1rem}
.blog-list-card{background:var(--surface);border:1px solid var(--border2);border-radius:var(--r);overflow:hidden;text-decoration:none;color:var(--white);display:flex;flex-direction:column;transition:border-color .25s,transform .25s}
.blog-list-card:hover{border-color:var(--border);transform:translateY(-3px)}
.blog-list-card--featured{grid-column:1 / -1;flex-direction:row}
.blog-list-card--featured .blc-img{width:280px;flex-shrink:0;aspect-ratio:auto}
.blc-img{background:var(--surface2);display:flex;align-items:center;justify-content:center;font-size:3rem;aspect-ratio:16/9;width:100%}
.blc-img--sm{font-size:2.2rem}
.blc-body{padding:1.75rem;display:flex;flex-direction:column;gap:.6rem;flex:1}
.blc-meta{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap}
.blc-lab{font-size:.65rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;padding:.2rem .6rem;border-radius:100px;border:1px solid var(--border);color:var(--cyan);background:var(--cyan-glow)}
.blc-date{font-size:.72rem;color:var(--muted)}
.blc-title{font-family:var(--display);letter-spacing:.03em;line-height:1.15;font-size:1.25rem}
.blog-list-card--featured .blc-title{font-size:1.7rem}
.blc-excerpt{font-size:.87rem;color:var(--muted);line-height:1.6;flex:1}
.blc-read{font-size:.8rem;font-weight:600;color:var(--cyan);margin-top:.5rem}

/* ── BLOG EMPTY STATE ── */
.blog-empty{text-align:center;padding:5rem 2rem;color:var(--muted)}
.blog-empty p{font-size:1rem;line-height:1.75;margin-bottom:2rem}
.blog-empty-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.8rem 1.8rem;border:1px solid var(--border2);border-radius:var(--r);color:var(--white);font-size:.9rem;font-weight:500;text-decoration:none;transition:border-color .2s,color .2s}
.blog-empty-btn:hover{border-color:var(--cyan);color:var(--cyan)}

/* ── POST ARTICLE ── */
.post-article{max-width:780px;margin:0 auto;padding:4rem 2rem 6rem}
.post-header{margin-bottom:3rem;padding-bottom:2.5rem;border-bottom:1px solid var(--border2)}
.post-meta-top{display:flex;align-items:center;gap:1rem;margin-bottom:1.25rem;flex-wrap:wrap}
.post-lab-tag{font-size:.65rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;padding:.25rem .75rem;border-radius:100px;border:1px solid var(--border);color:var(--cyan);background:var(--cyan-glow)}
.post-date{font-size:.8rem;color:var(--muted)}
.post-author{font-size:.8rem;color:var(--muted)}
.post-title{font-family:var(--display);font-size:clamp(2.2rem,5vw,4rem);letter-spacing:.04em;line-height:1;margin-bottom:1.25rem}
.post-excerpt{font-size:1.1rem;color:rgba(238,242,247,.6);line-height:1.75}

/* ── POST BODY TYPOGRAPHY ── */
.post-body{font-size:1.05rem;color:rgba(238,242,247,.85);line-height:1.8}
.post-body h2{font-family:var(--display);font-size:2rem;letter-spacing:.04em;color:var(--white);margin:3rem 0 1rem;padding-bottom:.75rem;border-bottom:1px solid var(--border2)}
.post-body h3{font-family:var(--display);font-size:1.4rem;letter-spacing:.04em;color:var(--white);margin:2rem 0 .75rem}
.post-body p{margin-bottom:1.5rem}
.post-body a{color:var(--cyan);text-decoration:underline;text-decoration-color:rgba(0,200,255,.3)}
.post-body a:hover{text-decoration-color:var(--cyan)}
.post-body ul,.post-body ol{margin:0 0 1.5rem 1.5rem}
.post-body li{margin-bottom:.4rem}
.post-body blockquote{border-left:3px solid var(--cyan);padding:.75rem 1.5rem;margin:2rem 0;background:var(--cyan-glow);border-radius:0 var(--r) var(--r) 0;font-style:italic;color:rgba(238,242,247,.7)}
.post-body code{background:var(--surface2);border:1px solid var(--border2);border-radius:3px;padding:.1rem .4rem;font-size:.88em;color:var(--cyan);font-family:monospace}
.post-body pre{background:var(--surface2);border:1px solid var(--border2);border-radius:var(--r);padding:1.5rem;overflow-x:auto;margin-bottom:1.5rem}
.post-body pre code{background:none;border:none;padding:0;font-size:.9rem}
.post-body img{max-width:100%;border-radius:var(--r);border:1px solid var(--border2);margin:1.5rem 0}
.post-body hr{border:none;border-top:1px solid var(--border2);margin:3rem 0}
.post-body strong{color:var(--white);font-weight:600}

/* ── POST FOOTER ── */
.post-footer{margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border2);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}
.post-tags{display:flex;flex-wrap:wrap;gap:.5rem}
.post-tag{font-size:.72rem;padding:.25rem .6rem;border-radius:100px;border:1px solid var(--border2);color:var(--muted)}
.post-back{font-size:.85rem;font-weight:600;color:var(--cyan);text-decoration:none;border-bottom:1px solid rgba(0,200,255,.3);padding-bottom:2px;transition:border-color .2s}
.post-back:hover{border-color:var(--cyan)}

/* ── POST NAVIGATION ── */
.post-nav{max-width:780px;margin:0 auto 4rem;padding:0 2rem;display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.post-nav-link{display:flex;flex-direction:column;gap:.3rem;padding:1.25rem;border:1px solid var(--border2);border-radius:var(--r);text-decoration:none;color:var(--white);transition:border-color .2s,background .2s}
.post-nav-link:hover{border-color:var(--border);background:var(--surface)}
.post-nav-next{text-align:right}
.post-nav-label{font-size:.7rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.post-nav-title{font-family:var(--display);font-size:1rem;letter-spacing:.04em;color:var(--cyan)}

/* ── SITE FOOTER ── */
.site-footer{background:var(--bg);border-top:1px solid var(--border2)}
.footer-inner{max-width:1100px;margin:0 auto;padding:3.5rem 2rem 2rem;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:3rem}
.footer-col--brand{}
.footer-logo{font-family:var(--display);font-size:1.4rem;letter-spacing:.06em;color:var(--white);text-decoration:none;display:inline-flex;align-items:center;gap:.5rem;margin-bottom:1rem}
.footer-dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan);flex-shrink:0}
.footer-desc{font-size:.85rem;color:var(--muted);line-height:1.65;max-width:260px;margin-bottom:1.25rem}
.footer-social{display:flex;gap:.75rem}
.footer-social a{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border:1px solid var(--border2);border-radius:var(--r);font-size:.75rem;font-weight:700;color:var(--muted);text-decoration:none;text-transform:uppercase;transition:border-color .2s,color .2s}
.footer-social a:hover{border-color:var(--cyan);color:var(--cyan)}
.footer-col-h{font-family:var(--display);font-size:.85rem;letter-spacing:.12em;color:var(--white);margin-bottom:1rem}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:.6rem}
.footer-links a,.footer-links span{font-size:.85rem;color:var(--muted);text-decoration:none;transition:color .2s}
.footer-links a:hover{color:var(--cyan)}
.footer-link-cyan{color:var(--cyan)!important}
.footer-bottom{max-width:1100px;margin:0 auto;padding:1.5rem 2rem;border-top:1px solid var(--border2);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}
.footer-bottom p{font-size:.78rem;color:var(--muted)}
.footer-llms{font-size:.75rem;color:var(--muted);border:1px solid var(--border2);padding:.25rem .6rem;border-radius:var(--r);text-decoration:none;transition:border-color .2s,color .2s}
.footer-llms:hover{border-color:var(--cyan);color:var(--cyan)}

/* ── RESPONSIVE ── */
@media(max-width:900px){
  #nav{padding:1rem 1.5rem}
  .nav-links{display:none;position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:flex-start;background:rgba(6,8,16,.98);border-bottom:1px solid var(--border);padding:1.5rem;gap:1.25rem}
  .nav-links.open{display:flex}
  .nav-burger{display:flex}
  .footer-inner{grid-template-columns:1fr 1fr;gap:2rem}
  .footer-col--brand{grid-column:1/-1}
  .blog-list-grid{grid-template-columns:1fr}
  .blog-list-card--featured{flex-direction:column}
  .blog-list-card--featured .blc-img{width:100%;aspect-ratio:16/9}
  .post-nav{grid-template-columns:1fr}
}
@media(max-width:580px){
  .footer-inner{grid-template-columns:1fr}
  .post-article{padding:2.5rem 1.25rem 4rem}
  .footer-bottom{flex-direction:column;align-items:flex-start;padding:1.25rem}
}