:root{
  --bg:#ffffff; --surface:#f4f5f7; --surface-2:#e8eaee; --line:#dde0e5;
  --text:#15181e; --muted:#5b616b; --accent:#3d5afe; --accent-2:#8b5cf6; --accent-3:#06b6d4;
  --dark:#000000; --dark-text:#f5f6f8; --dark-muted:#9aa1ad; --dark-line:rgba(255,255,255,.1);
  --display:"Geist","SF Pro Display","Helvetica Neue",Arial,sans-serif;
  --body:"Geist","Helvetica Neue",Arial,sans-serif;
  --wrap:1240px; --pad:clamp(20px,4vw,48px); --r-lg:20px; --r-md:12px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){--bg:#0c0d10;--surface:#14161a;--surface-2:#1c1f24;--line:#2a2e35;--text:#eef0f3;--muted:#9aa1ad;--accent:#7f93ff}
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--body);font-size:1rem;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:inherit}
h1,h2,h3{font-family:var(--display);font-weight:600;letter-spacing:-.03em;line-height:1.08;margin:0}
p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--pad)}
[hidden]{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* Header */
.header{position:sticky;top:0;z-index:50;background:rgba(0,0,0,.82);backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);border-bottom:1px solid var(--dark-line)}
.header .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.logo{display:inline-flex;align-items:center;text-decoration:none}
.logo img{height:24px;width:auto;transform:translateY(1px);transition:transform .5s var(--ease)}
.logo:hover img{transform:translateY(1px) scale(1.03)}
.nav{display:flex;align-items:center;gap:24px}
.nav a.link{position:relative;color:var(--dark-muted);text-decoration:none;font-size:.925rem;transition:color .2s}
.nav a.link:hover{color:var(--dark-text)}
.lang{position:relative;display:inline-grid;grid-template-columns:1fr 1fr;border:1px solid rgba(255,255,255,.2);border-radius:999px;padding:3px}
.lang::before{content:"";position:absolute;top:3px;bottom:3px;left:3px;width:calc(50% - 3px);border-radius:999px;background:rgba(255,255,255,.16);transition:transform .4s var(--ease)}
.lang[data-active="es"]::before{transform:translateX(100%)}
.lang button{position:relative;width:40px;height:32px;border:0;background:none;color:var(--dark-muted);font:inherit;font-size:.8rem;font-weight:500;cursor:pointer;border-radius:999px;transition:color .3s}
.lang button[aria-pressed="true"]{color:#fff}
@media (max-width:620px){.nav a.link{display:none}.lang button{width:36px;height:30px}.logo img{height:20px}}

/* Hero del blog */
.blog-hero{position:relative;background:var(--dark);color:var(--dark-text);overflow:hidden;padding:clamp(72px,10vw,128px) 0 clamp(56px,7vw,88px)}
.blog-hero canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0;opacity:.9}
.blog-hero .wrap{position:relative;z-index:1}
.blog-hero h1{font-size:clamp(2.6rem,6vw,4.75rem);letter-spacing:-.05em}
.blog-hero p{margin-top:20px;max-width:46ch;color:#c9ced6;font-size:clamp(1.05rem,1.3vw,1.2rem)}
.crumb{display:inline-flex;align-items:center;gap:10px;color:var(--dark-muted);text-decoration:none;font-size:.925rem;margin-bottom:32px;transition:color .2s}
.crumb:hover{color:#fff}
.crumb i{display:inline-block;width:20px;height:1px;background:currentColor;position:relative;transition:width .35s var(--ease)}
.crumb:hover i{width:30px}
.crumb i::before{content:"";position:absolute;left:0;top:-3px;width:7px;height:7px;border-bottom:1px solid currentColor;border-left:1px solid currentColor;transform:rotate(45deg)}

/* Listado */
.section{padding:clamp(64px,8vw,104px) 0}
.posts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,2.4vw,28px)}
@media (max-width:1000px){.posts{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:660px){.posts{grid-template-columns:1fr}}
.card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--bg);text-decoration:none;color:inherit;transition:transform .4s var(--ease),box-shadow .4s}
.card:hover{transform:translateY(-3px);box-shadow:0 24px 60px -36px rgba(30,40,90,.5)}
.card .thumb{aspect-ratio:16/9;background:var(--surface);overflow:hidden}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.card:hover .thumb img{transform:scale(1.04)}
.card .body{display:flex;flex-direction:column;gap:12px;padding:clamp(22px,2.2vw,28px);flex:1}
.meta{display:flex;align-items:center;gap:10px;font-size:.8rem;color:var(--muted)}
.tag{display:inline-block;padding:3px 9px;border:1px solid var(--line);border-radius:999px;font-size:.72rem;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
.card h2{font-size:1.3rem;line-height:1.2}
.card p{color:var(--muted);font-size:.975rem;flex:1}
.more{display:inline-flex;align-items:center;gap:10px;font-weight:500;font-size:.925rem}
.more i{display:inline-block;width:26px;height:1px;background:currentColor;position:relative;transition:width .4s var(--ease)}
.more i::after{content:"";position:absolute;right:0;top:-3px;width:7px;height:7px;border-top:1px solid currentColor;border-right:1px solid currentColor;transform:rotate(45deg)}
.card:hover .more i{width:44px}
.empty{color:var(--muted);border:1px dashed var(--line);border-radius:var(--r-md);padding:40px;text-align:center}

/* Artículo */
.article{padding:clamp(48px,6vw,80px) 0 clamp(64px,8vw,104px)}
.article .wrap{max-width:760px}
.article .cover{margin:0 0 clamp(32px,4vw,48px);border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line)}
.prose{font-size:1.075rem;line-height:1.7;color:var(--text)}
.prose > * + *{margin-top:1.1em}
.prose h2{font-size:clamp(1.5rem,2.6vw,2rem);margin-top:2em;letter-spacing:-.035em}
.prose h3{font-size:1.25rem;margin-top:1.6em}
.prose p,.prose li{color:var(--muted)}
.prose strong{color:var(--text);font-weight:600}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.2em}
.prose li+li{margin-top:.4em}
.prose img{border-radius:var(--r-md);border:1px solid var(--line)}
.prose blockquote{margin:1.6em 0;padding-left:20px;border-left:2px solid var(--accent);font-family:var(--display);font-size:1.2rem;letter-spacing:-.02em;color:var(--text)}
.prose code{background:var(--surface);padding:2px 6px;border-radius:6px;font-size:.92em}
.prose hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}
.article-head{margin-bottom:clamp(28px,3vw,40px)}
.article-head h1{font-size:clamp(2.1rem,4.4vw,3.4rem);letter-spacing:-.045em}
.article-head .lead{margin-top:18px;color:var(--muted);font-size:1.15rem;line-height:1.6}
.article-head .meta{margin-bottom:18px}
.back{display:inline-flex;align-items:center;gap:10px;margin-top:clamp(40px,5vw,64px);padding-top:28px;border-top:1px solid var(--line);color:var(--muted);text-decoration:none;font-size:.95rem}
.back:hover{color:var(--text)}

/* Cierre */
.closing{position:relative;background:var(--dark);color:var(--dark-text);text-align:center;padding:clamp(80px,10vw,120px) 0;overflow:hidden}
.closing h2{font-size:clamp(2rem,5vw,3.4rem);letter-spacing:-.05em}
.closing .btn{display:inline-flex;align-items:center;gap:10px;height:48px;padding:0 22px;margin-top:28px;border-radius:999px;background:var(--dark-text);color:#000;text-decoration:none;font-weight:500;transition:background .25s,transform .25s var(--ease)}
.closing .btn:hover{background:#fff}
.closing .btn:active{transform:scale(.97)}
.halo{position:absolute;left:50%;top:50%;width:min(900px,120vw);height:420px;transform:translate(-50%,-50%);background:radial-gradient(50% 50% at 50% 50%,rgba(80,105,255,.26),rgba(139,92,246,.1) 45%,transparent 70%);filter:blur(24px);animation:breathe 10s ease-in-out infinite;pointer-events:none}
@keyframes breathe{50%{transform:translate(-50%,-50%) scale(1.14);opacity:.65}}
.footbar{background:#141518;color:var(--dark-muted)}
.footbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px;padding-top:20px;padding-bottom:20px;font-size:.875rem;flex-wrap:wrap}
.footbar .logo img{height:18px;opacity:.75}
@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important}html{scroll-behavior:auto}}

/* FAQ */
.faq{margin-top:2.6em;padding-top:1.8em;border-top:1px solid var(--line)}
.faq h2{margin-bottom:.6em}
.faq details{border-bottom:1px solid var(--line);padding:14px 0}
.faq summary{cursor:pointer;font-family:var(--display);font-weight:500;font-size:1.05rem;letter-spacing:-.015em;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:start}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:1.2rem;line-height:1;transition:transform .3s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin-top:10px;color:var(--muted)}