/* ═══════════════════════════════════════════════════════════════
   BLOG — Hoja de estilos compartida (índice + posts)
   Tokens, nav y footer portados 1:1 del sitio oficial (index.html)
   para consistencia total. Dark mode forzado.
═══════════════════════════════════════════════════════════════ */

/* ── Design tokens (heredados de index.html) ── */
:root {
  --bg:#F8F7F4; --bg-2:#F1F0EB; --surface:#E8E6DE; --surface2:#D8D6CC;
  --border:rgba(0,0,0,0.08); --border-md:rgba(0,0,0,0.13);
  --t1:#080810; --t2:#2C2C3A; --t3:#5E5F70; --t4:#9A9BAB; --t5:#C8C9D6;
  --primary:#1B47E6; --primary-h:#1438C8; --primary-rgb:27,71,230;
  --primary-lt:rgba(27,71,230,0.07); --primary-bd:rgba(27,71,230,0.18);
  --accent:#C4962E; --accent-rgb:196,150,46; --accent-lt:rgba(196,150,46,0.08);
  --card-bg:#FFFFFF; --card-sh:0 1px 2px rgba(0,0,0,0.04),0 4px 18px rgba(0,0,0,0.07);
  --card-sh-h:0 8px 32px rgba(27,71,230,0.12),0 2px 8px rgba(0,0,0,0.06);
  --nav-bg:rgba(248,247,244,0.90); --nav-bd:rgba(0,0,0,0.08);
  --footer-bg:#080810; --orb1-op:0.09; --orb2-op:0.06; --grid-op:0.035;
}
:root.dark {
  --bg:#06070C; --bg-2:#0A0B14; --surface:#0E0F1A; --surface2:#13152A;
  --border:rgba(255,255,255,0.07); --border-md:rgba(255,255,255,0.12);
  --t1:#F2F1EE; --t2:#B8BAD0; --t3:#606278; --t4:#333550; --t5:#1C1E34;
  --primary:#4A70FF; --primary-h:#3355E8; --primary-rgb:74,112,255;
  --primary-lt:rgba(74,112,255,0.10); --primary-bd:rgba(74,112,255,0.25);
  --accent:#D4A843; --accent-rgb:212,168,67; --accent-lt:rgba(212,168,67,0.10);
  --card-bg:rgba(255,255,255,0.04); --card-sh:inset 0 1px 0 rgba(255,255,255,0.05);
  --card-sh-h:0 0 0 1px rgba(74,112,255,0.3),0 8px 32px rgba(0,0,0,0.5);
  --nav-bg:rgba(6,7,12,0.90); --nav-bd:rgba(255,255,255,0.06);
  --footer-bg:#06070C; --orb1-op:0.22; --orb2-op:0.15; --grid-op:0.04;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg); color:var(--t2);
  font-family:'Inter',system-ui,sans-serif;
  -webkit-font-smoothing:antialiased; overflow-x:hidden; margin:0;
}

/* Grain texture — identidad TWL */
body::after{
  content:''; position:fixed; inset:0; pointer-events:none; z-index:9999; opacity:0.022;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)'/%3E%3C/svg%3E");
  background-repeat:repeat; background-size:128px 128px;
}

#progress{position:fixed;top:0;left:0;height:2px;width:0;background:linear-gradient(90deg,var(--primary),var(--primary-h));z-index:9999;box-shadow:0 0 12px rgba(var(--primary-rgb),.6);}

.c{max-width:1280px;margin:0 auto;padding:0 24px;}
.c-sm{max-width:960px;margin:0 auto;padding:0 24px;}

.t1{color:var(--t1);} .t2{color:var(--t2);} .t3{color:var(--t3);}

/* ── Nav (pill flotante portado del oficial) ── */
.nav-wrap{position:fixed;top:0;width:100%;z-index:50;padding:14px 0;transition:padding .35s ease;}
.nav-wrap>.c{border:1px solid transparent;border-radius:18px;padding:10px 18px;transition:background-color .35s ease,border-color .35s ease,box-shadow .35s ease,backdrop-filter .35s ease;}
.nav-wrap.scrolled{padding:10px 0;}
.nav-wrap.scrolled>.c{background:var(--nav-bg);border-color:var(--nav-bd);backdrop-filter:blur(22px) saturate(180%);-webkit-backdrop-filter:blur(22px) saturate(180%);box-shadow:0 8px 30px rgba(0,0,0,.4);}
.nav-link{color:var(--t3);font-size:14px;font-weight:500;text-decoration:none;transition:color .2s;position:relative;}
.nav-link::after{content:'';position:absolute;left:0;bottom:-5px;width:0;height:1.5px;background:var(--primary);transition:width .28s cubic-bezier(.2,.8,.2,1);}
.nav-link:hover{color:var(--t1);}
.nav-link:hover::after{width:100%;}
.nav-link-active{color:var(--t1);}
.nav-link-active::after{width:100%;}
.mobile-panel{background:var(--nav-bg);border-bottom:1px solid var(--nav-bd);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);}

/* ── Buttons ── */
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;font-weight:700;font-size:15px;padding:14px 30px;border-radius:13px;text-decoration:none;transition:background .25s ease,transform .25s ease;border:none;cursor:pointer;font-family:inherit;letter-spacing:.01em;}
.btn-primary:hover{background:var(--primary-h);transform:translateY(-2px);}

/* ── Badge pill ── */
.badge-pill{display:inline-flex;align-items:center;gap:7px;background:var(--primary-lt);border:1px solid var(--primary-bd);border-radius:999px;padding:5px 13px;font-size:12px;font-weight:600;color:var(--primary);letter-spacing:.04em;}

/* ── Orbs + grid (bg ambiente del header) ── */
.orb{position:absolute;border-radius:50%;filter:blur(80px);pointer-events:none;}
.orb-1{opacity:var(--orb1-op);}
.orb-2{opacity:var(--orb2-op);}
.grid-bg{position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(var(--primary-rgb),var(--grid-op)) 1px,transparent 1px),linear-gradient(90deg,rgba(var(--primary-rgb),var(--grid-op)) 1px,transparent 1px);background-size:64px 64px;}

/* ── Section ── */
.section{padding:64px 20px;}
@media(min-width:768px){.section{padding:88px 24px;}}
.section-alt{background:var(--bg-2);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}

/* ── Footer ── */
.site-footer{background:var(--footer-bg);}

/* ═══════════════════════════════════════════════════════════════
   BLOG HERO (índice)
═══════════════════════════════════════════════════════════════ */
.blog-hero{position:relative;overflow:hidden;padding:140px 20px 56px;background:var(--bg);}
@media(min-width:768px){.blog-hero{padding:170px 24px 72px;}}
.blog-hero-h1{font-size:clamp(30px,6vw,52px);font-weight:800;line-height:1.08;letter-spacing:-0.02em;color:var(--t1);margin:6px 0 18px;max-width:18ch;}
.blog-hero-sub{font-size:clamp(15px,2.2vw,19px);line-height:1.6;color:var(--t3);max-width:60ch;}

/* ── Breadcrumb ── */
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--t3);margin-bottom:18px;}
.breadcrumb a{color:var(--t3);text-decoration:none;transition:color .2s;}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb span[aria-current]{color:var(--t1);font-weight:600;}
.breadcrumb span[aria-hidden]{opacity:.4;}

/* ── Grilla de posts ── */
.post-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px;}
.post-card{background:var(--card-bg);border:1px solid var(--border);border-radius:20px;box-shadow:var(--card-sh);overflow:hidden;transition:transform .3s ease,box-shadow .3s ease;}
.post-card:hover{transform:translateY(-5px);box-shadow:var(--card-sh-h);}
.post-card-link{display:flex;flex-direction:column;height:100%;text-decoration:none;color:inherit;}
.post-card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--surface);}
.post-card-media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s ease;}
.post-card:hover .post-card-media img{transform:scale(1.04);}
.post-tag{position:absolute;top:14px;left:14px;background:rgba(6,7,12,0.72);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);color:#F2F1EE;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:5px 11px;border-radius:999px;border:1px solid rgba(255,255,255,.14);}
.post-card-body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-date{font-size:12px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--accent);}
.post-card-title{font-size:21px;font-weight:700;line-height:1.25;color:var(--t1);letter-spacing:-0.01em;margin:0;}
.post-card-excerpt{font-size:14.5px;line-height:1.6;color:var(--t3);margin:0;}
.post-card-cta{margin-top:auto;padding-top:8px;font-size:14px;font-weight:700;color:var(--primary);display:inline-flex;align-items:center;gap:6px;}
.post-card-soon{border-style:dashed;border-color:var(--border-md);background:transparent;}
.post-card-soon:hover{transform:none;box-shadow:none;}

/* ── CTA section ── */
.cta-title{font-size:clamp(26px,5vw,40px);font-weight:800;letter-spacing:-0.02em;color:var(--t1);margin:0 0 14px;line-height:1.12;}
.cta-sub{font-size:clamp(15px,2.2vw,18px);line-height:1.6;color:var(--t3);max-width:52ch;margin:0 auto 28px;}

/* ═══════════════════════════════════════════════════════════════
   ARTÍCULO (post individual) — lectura cómoda ~70ch
═══════════════════════════════════════════════════════════════ */
.article-wrap{padding:130px 20px 40px;background:var(--bg);}
@media(min-width:768px){.article-wrap{padding:160px 24px 48px;}}
.article{max-width:720px;margin:0 auto;}
.article-head{margin-bottom:34px;}
.article-eyebrow{font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent);margin:14px 0 0;}
.article h1{font-size:clamp(30px,5.4vw,46px);font-weight:800;line-height:1.12;letter-spacing:-0.02em;color:var(--t1);margin:14px 0 18px;}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;font-size:13.5px;color:var(--t3);}
.article-meta .dot{opacity:.4;}

.article-figure{margin:0 0 36px;border-radius:18px;overflow:hidden;border:1px solid var(--border);box-shadow:var(--card-sh);}
.article-figure img{width:100%;height:auto;display:block;}
.article-figure figcaption{font-size:12.5px;color:var(--t4);padding:10px 16px;background:var(--bg-2);border-top:1px solid var(--border);}

/* Cuerpo del post */
.prose{color:var(--t2);font-size:17.5px;line-height:1.75;}
.prose > p{margin:0 0 22px;}
.prose h2{font-size:clamp(22px,3.4vw,30px);font-weight:700;line-height:1.2;letter-spacing:-0.015em;color:var(--t1);margin:46px 0 16px;}
.prose h3{font-size:clamp(18px,2.4vw,22px);font-weight:700;line-height:1.3;color:var(--t1);margin:32px 0 10px;}
.prose strong{color:var(--t1);font-weight:700;}
.prose a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;transition:color .2s;}
.prose a:hover{color:var(--primary-h);}
/* El CTA es un <a> dentro de .prose → .prose a le pisaba el color. Forzamos texto blanco y sin subrayado en el botón. */
.prose a.btn-primary, a.btn-primary{color:#fff;text-decoration:none;}
.prose a.btn-primary:hover, a.btn-primary:hover{color:#fff;text-decoration:none;}
.prose code{background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:1px 6px;font-size:.92em;color:var(--t1);font-family:ui-monospace,'SF Mono',Menlo,monospace;}
.prose blockquote{margin:28px 0;padding:18px 24px;border-left:3px solid var(--primary);background:var(--primary-lt);border-radius:0 14px 14px 0;color:var(--t2);font-size:16.5px;line-height:1.65;}
.prose blockquote p{margin:0;}
.prose hr{border:none;border-top:1px solid var(--border);margin:40px 0;}

/* FAQ */
.faq{margin:44px 0 8px;}
.faq-item{border-bottom:1px solid var(--border);padding:22px 0;}
.faq-item:first-of-type{border-top:1px solid var(--border);}
.faq-q{font-size:18px;font-weight:700;color:var(--t1);margin:0 0 8px;line-height:1.35;}
.faq-a{font-size:16px;line-height:1.7;color:var(--t3);margin:0;}

/* CTA in-article */
.article-cta{margin:48px 0 8px;padding:34px;border-radius:20px;background:var(--bg-2);border:1px solid var(--border);text-align:center;}
.article-cta h3{font-size:22px;font-weight:700;color:var(--t1);margin:0 0 10px;}
.article-cta p{font-size:16px;line-height:1.6;color:var(--t3);max-width:48ch;margin:0 auto 22px;}

/* Volver al blog */
.back-to-blog{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--t3);text-decoration:none;margin-top:40px;transition:color .2s;}
.back-to-blog:hover{color:var(--primary);}

::-webkit-scrollbar{width:6px;}
::-webkit-scrollbar-track{background:var(--bg);}
::-webkit-scrollbar-thumb{background:var(--border-md);border-radius:3px;}

/* Reduced motion: degradar animaciones a fade simple (regla TWL) */
@media (prefers-reduced-motion: reduce){
  .orb{animation:none;}
  .post-card,.post-card-media img,.btn-primary{transition:opacity .3s ease;}
  html{scroll-behavior:auto;}
}