:root{
  --ink:#182B3A;
  --ink-soft:#3E5164;
  --paper:#E9E7DE;
  --paper-deep:#DFDCCF;
  --card:#FBFAF6;
  --ledger:#2F5D50;
  --ledger-deep:#20463B;
  --gold:#C79A45;
  --brick:#AE4A30;
  --line:rgba(24,43,58,0.14);
  --shadow: 0 18px 40px -20px rgba(24,43,58,0.35);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:'IBM Plex Sans', sans-serif;line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:'Fraunces', serif;margin:0 0 .4em;color:var(--ink);letter-spacing:-0.01em;}
a{color:inherit;}
.mono{font-family:'IBM Plex Mono', monospace;}
.wrap{max-width:1120px;margin:0 auto;padding:0 28px;}
img{max-width:100%;height:auto;display:block;}

body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:repeating-linear-gradient(to bottom, transparent 0, transparent 37px, rgba(24,43,58,0.05) 38px);
  opacity:.5;
}

header{position:sticky;top:0;z-index:50;background:rgba(31,54,77,0.96);backdrop-filter:blur(6px);border-bottom:1px solid rgba(255,255,255,0.12);}
.nav{display:flex;align-items:center;justify-content:space-between;padding:18px 28px;max-width:1120px;margin:0 auto;}
.brand{font-family:'Fraunces', serif;font-weight:600;font-size:1.15rem;display:flex;align-items:baseline;gap:.5em;color:#F3F1E8;}
.brand span.tag{
  font-family:'IBM Plex Mono', monospace;font-size:.62rem;color:var(--gold);
  letter-spacing:.14em;font-weight:600;border:1px solid var(--gold);padding:2px 6px;border-radius:3px;
}
nav.links{display:flex;gap:16px;font-size:.82rem;}
nav.links a{text-decoration:none;color:#B9C2CB;}
nav.links a:hover, nav.links a.active{color:#fff;}
.btn{
  font-family:'IBM Plex Sans', sans-serif;font-weight:600;font-size:.88rem;
  padding:10px 20px;border-radius:3px;text-decoration:none;
  display:inline-flex;align-items:center;gap:8px;border:1px solid transparent;background:transparent;-webkit-appearance:none;appearance:none;outline:none;
  transition:transform .15s ease, box-shadow .15s ease;cursor:pointer;
}
.btn-primary{background:var(--ledger);color:#fff;}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 18px -8px rgba(47,93,80,0.55);}
.btn-ghost{border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--paper);}
.menu-toggle{display:none;background:none;border:none;font-size:1.4rem;cursor:pointer;color:#F3F1E8;padding:4px;line-height:1;}

/* ---------- Menú móvil desplegable ---------- */
.mobile-panel{
  position:fixed;top:0;right:0;bottom:0;width:min(78vw, 320px);
  background:var(--card);z-index:100;box-shadow:-18px 0 40px -20px rgba(24,43,58,0.5);
  transform:translateX(100%);transition:transform .25s ease;padding:24px;overflow-y:auto;
}
.mobile-panel.open{transform:translateX(0);}
.mobile-panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px;}
.mobile-panel-head .brand{color:var(--ink);}
.mobile-panel-close{background:none;border:none;font-size:1.6rem;cursor:pointer;color:var(--ink);line-height:1;}
.mobile-panel nav{display:flex;flex-direction:column;gap:4px;}
.mobile-panel nav a{text-decoration:none;color:var(--ink);font-size:1.05rem;font-weight:500;padding:14px 4px;border-bottom:1px solid var(--line);}
.mobile-panel nav a.active{color:var(--ledger);}
.mobile-panel .btn{margin-top:22px;width:100%;justify-content:center;box-sizing:border-box;}
.mobile-overlay{display:none;position:fixed;inset:0;background:rgba(24,43,58,0.4);z-index:99;}
.mobile-overlay.open{display:block;}

.eyebrow{
  font-family:'IBM Plex Mono', monospace;font-size:.72rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ledger);font-weight:600;margin-bottom:18px;
  display:flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--ledger);}

section{position:relative;z-index:1;padding:80px 0;}
.section-intro{color:var(--ink-soft);font-size:1.02rem;max-width:760px;margin:0 0 28px;}

/* ---------- Hero ---------- */
.page-hero{padding:72px 0 40px;}
.page-hero h1{font-size:clamp(2.1rem,4vw,3.1rem);font-weight:600;line-height:1.1;}
.page-hero p.lead{font-size:1.08rem;color:var(--ink-soft);max-width:60ch;margin:18px 0 22px;}
.page-hero .text-link{color:var(--ledger);font-weight:700;text-decoration:none;border-bottom:1px solid var(--ledger);font-size:.94rem;}
.page-hero .text-link:hover{color:var(--ledger-deep);border-color:var(--ledger-deep);}

.rb-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin-top:36px;}
.rb-stat{background:var(--card);border:1px solid var(--line);border-radius:6px;padding:18px 20px;}
.rb-stat strong{display:block;font-size:1.7rem;color:var(--ledger);}
.rb-stat span{display:block;margin-top:4px;color:var(--ink-soft);font-size:.82rem;}

/* ---------- Toolbar ---------- */
.rb-toolbar{
  position:sticky;top:74px;z-index:40;
  background:rgba(251,250,246,0.96);backdrop-filter:blur(8px);
  border:1px solid var(--line);border-radius:8px;padding:18px 20px;
  box-shadow:0 8px 22px -16px rgba(24,43,58,.3);
}
.rb-search{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:4px;background:#fff;padding:0 14px;}
.rb-search span{font-size:20px;color:var(--ink-soft);}
.rb-search input{width:100%;border:0;outline:0;padding:12px 0;font:inherit;color:var(--ink);background:transparent;}
.rb-filters{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.rb-filter{
  font-family:'IBM Plex Mono', monospace;font-size:.72rem;letter-spacing:.03em;
  border:1px solid var(--line);background:#fff;color:var(--ink-soft);
  border-radius:20px;padding:7px 14px;cursor:pointer;
}
.rb-filter.active,.rb-filter:hover{background:var(--ledger);border-color:var(--ledger);color:#fff;}

/* ---------- Bloques (acordeón, mismo lenguaje visual que /cursos) ---------- */
.block-list{display:flex;flex-direction:column;gap:12px;margin-top:8px;}
details.block{background:var(--card);border:1px solid var(--line);border-radius:6px;overflow:hidden;scroll-margin-top:96px;}
details.block[open]{border-color:var(--ledger);}
details.block summary{list-style:none;cursor:pointer;padding:18px 22px;display:flex;align-items:center;gap:16px;}
details.block summary::-webkit-details-marker{display:none;}
.block-code{
  font-family:'IBM Plex Mono', monospace;font-size:.66rem;color:var(--ledger);
  border:1px solid var(--ledger);border-radius:4px;padding:4px 8px;letter-spacing:.03em;
  white-space:nowrap;text-transform:uppercase;
}
.block-summary-text{flex:1;}
.block-summary-text h3{font-size:1rem;margin:0;font-family:'IBM Plex Sans',sans-serif;font-weight:600;}
.chevron{transition:transform .2s ease;color:var(--ink-soft);flex-shrink:0;}
details.block[open] .chevron{transform:rotate(180deg);}
.block-content{padding:0 22px 22px;border-top:1px dashed var(--line);}
.block-content > p.r-summary{margin-top:18px;color:var(--ink-soft);}

/* ---------- Tarjetas-enlace a fichas propias (portada) ---------- */
.card-grid{display:flex;flex-wrap:wrap;gap:14px;margin-top:8px;align-items:flex-start;}
.card-col{display:flex;flex-direction:column;gap:14px;flex:1 1 280px;min-width:280px;}
a.block-link{
  background:var(--card);border:1px solid var(--line);border-radius:6px;
  padding:18px 22px;text-decoration:none;display:flex;flex-direction:column;gap:10px;
  transition:transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
a.block-link:hover{border-color:var(--ledger);transform:translateY(-2px);box-shadow:var(--shadow);}
a.block-link[hidden]{display:none;}
a.block-link .block-link-head{display:flex;align-items:center;gap:12px;}
a.block-link .block-link-head h3{font-size:1rem;margin:0;font-family:'IBM Plex Sans',sans-serif;font-weight:600;flex:1;}
a.block-link p{margin:0;color:var(--ink-soft);font-size:.88rem;line-height:1.55;}
a.block-link .block-link-cta{
  font-family:'IBM Plex Mono', monospace;font-size:.72rem;color:var(--ledger);
  letter-spacing:.03em;margin-top:auto;
}

/* ---------- Piezas internas de las fichas ---------- */
.r-block{margin:18px 0;scroll-margin-top:96px;}
.r-block h4{font-size:.98rem;margin:0 0 8px;}
.r-block p{color:var(--ink-soft);font-size:.92rem;line-height:1.6;}
.r-block ul{padding-left:18px;margin:8px 0;}
.r-block li{margin:6px 0;line-height:1.55;color:var(--ink-soft);font-size:.92rem;}

.r-tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;}
.r-tile{border-top:2px solid var(--ledger);padding:14px 2px 0;}
.r-tile .num{font-size:.7rem;color:var(--ledger);letter-spacing:.08em;display:block;margin-bottom:4px;}
.r-tile strong{display:block;font-size:.94rem;margin-bottom:4px;}
.r-tile p{margin:0;}
.r-tile-code{text-align:center;border-top-color:var(--gold);}
.r-tile-code strong{font-size:1.8rem;color:var(--ledger);}

.r-step{display:grid;grid-template-columns:1fr minmax(180px,300px);gap:18px;align-items:start;}
.r-step img{width:100%;max-height:250px;object-fit:contain;border:1px solid var(--line);border-radius:6px;background:var(--paper);padding:6px;}

.r-code-grid{display:grid;grid-template-columns:1fr minmax(160px,220px);gap:18px;align-items:start;}

.r-table-details{border:1px solid var(--line);border-radius:6px;padding:14px 16px;}
.r-table-details summary{cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.r-table-details summary::-webkit-details-marker{display:none;}
.r-table-details summary h4{margin:0;}
.r-table-details summary::after{content:"▾";color:var(--ledger);font-size:1rem;transition:transform .2s ease;flex-shrink:0;}
.r-table-details[open] summary::after{transform:rotate(180deg);}
.r-table-details[open] summary{margin-bottom:10px;}
.r-table-count{font-family:'IBM Plex Mono', monospace;font-size:.7rem;color:var(--ink-soft);white-space:nowrap;}

.r-table-head-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 8px;}
.r-table-head-row h4{margin:0;}
.r-table-meta{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.r-pdf-btn{
  font-family:'IBM Plex Mono', monospace;font-size:.68rem;letter-spacing:.02em;
  display:inline-flex;align-items:center;gap:5px;
  border:1px solid var(--line);background:#fff;color:var(--ledger);
  border-radius:20px;padding:5px 11px;cursor:pointer;white-space:nowrap;
  transition:border-color .15s ease, color .15s ease;
}
.r-pdf-btn:hover{border-color:var(--ledger);color:var(--ledger-deep);}
.r-pdf-btn:disabled{opacity:.6;cursor:wait;}
.r-pdf-btn-all{margin-top:6px;padding:9px 18px;font-size:.76rem;background:var(--ledger);color:#fff;border-color:var(--ledger);white-space:normal;text-align:left;max-width:100%;}
.r-pdf-btn-all:hover{background:var(--ledger-deep);border-color:var(--ledger-deep);color:#fff;}

.r-table-wrap{overflow:auto;}
table.r-table{border-collapse:collapse;width:100%;min-width:520px;}
table.r-table th{font-family:'IBM Plex Mono', monospace;font-size:.68rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-soft);text-align:left;border-bottom:2px solid var(--line);padding:9px 10px;}
table.r-table td{padding:10px;border-bottom:1px solid var(--line);font-size:.88rem;color:var(--ink-soft);vertical-align:top;}
table.r-table td:first-child{font-weight:600;color:var(--ledger);}
.r-inline-link{color:var(--ledger);text-decoration:underline;text-underline-offset:2px;}
.r-inline-link:hover{color:var(--ledger-deep);}

.r-images{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;}
.r-images img{width:100%;border:1px solid var(--line);border-radius:6px;background:var(--paper);padding:6px;}

.r-step img, .r-images img{cursor:zoom-in;transition:opacity .15s ease, box-shadow .15s ease;}
.r-step img:hover, .r-images img:hover{opacity:.82;box-shadow:0 0 0 2px var(--gold);}

/* ---------- Lightbox ---------- */
.lightbox{display:none;position:fixed;inset:0;z-index:500;background:rgba(24,43,58,0.92);align-items:center;justify-content:center;padding:40px;}
.lightbox.open{display:flex;}
.lightbox img{max-width:92vw;max-height:88vh;border-radius:8px;box-shadow:0 30px 70px -20px rgba(0,0,0,.6);background:#fff;cursor:default;}
.lightbox-close{position:fixed;top:18px;right:22px;background:none;border:none;color:#F3F1E8;font-size:2rem;line-height:1;cursor:pointer;padding:8px;}
.lightbox-close:hover{color:var(--gold);}
.lightbox-hint{position:fixed;bottom:20px;left:0;right:0;text-align:center;font-family:'IBM Plex Mono', monospace;font-size:.72rem;letter-spacing:.05em;color:#B9C2CB;}

.r-notice{border:1px solid var(--ledger);background:rgba(47,93,80,0.06);border-radius:6px;padding:16px 18px;margin:16px 0;}
.r-notice strong{display:block;color:var(--ledger-deep);margin-bottom:4px;}
.r-notice p{color:var(--ink-soft);font-size:.9rem;margin:0 0 8px;}

.r-warning{border:1px solid var(--brick);background:rgba(174,74,48,0.06);border-radius:6px;padding:16px 18px;margin:16px 0;}
.r-warning strong{display:block;color:var(--brick);margin-bottom:6px;}
.r-warning ul{padding-left:18px;margin:0;}
.r-warning li{margin:6px 0;line-height:1.55;color:var(--ink-soft);font-size:.9rem;}

.r-badge{
  display:inline-flex;align-items:center;font-family:'IBM Plex Mono', monospace;font-size:.64rem;
  letter-spacing:.06em;text-transform:uppercase;border-radius:20px;padding:3px 9px;
  background:var(--ledger);color:#fff;margin:0 8px 8px 0;
}
.r-source-row{display:flex;flex-wrap:wrap;gap:16px;margin-top:14px;}
.r-source{font-family:'IBM Plex Mono', monospace;font-size:.78rem;color:var(--ledger);text-decoration:none;border-bottom:1px solid var(--ledger);}
.r-source:hover{color:var(--ledger-deep);border-color:var(--ledger-deep);}

.rb-empty{border:1px dashed var(--line);padding:26px;border-radius:8px;color:var(--ink-soft);text-align:center;}

/* ---------- Fichas propias: breadcrumb, cabecera y relacionadas ---------- */
.rb-breadcrumb{padding:18px 0 0;font-family:'IBM Plex Mono', monospace;font-size:.74rem;color:var(--ink-soft);}
.rb-breadcrumb a{color:var(--ink-soft);text-decoration:none;}
.rb-breadcrumb a:hover{color:var(--ledger);}
.rb-breadcrumb span.sep{margin:0 8px;color:var(--line);}
.rb-breadcrumb span.current{color:var(--ink);}

.entry-hero{padding:26px 0 30px;}
.entry-hero h1{font-size:clamp(1.8rem,3.4vw,2.6rem);font-weight:600;line-height:1.15;}
.entry-hero p.lead{font-size:1.02rem;color:var(--ink-soft);max-width:70ch;margin:14px 0 0;}

.entry-body{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:8px 22px 26px;}

.rb-related{margin-top:20px;}
.rb-related h4{font-size:.84rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft);font-family:'IBM Plex Mono', monospace;margin-bottom:12px;}
.rb-related-list{display:flex;flex-wrap:wrap;gap:10px;}
.rb-related-list a{
  font-size:.86rem;color:var(--ledger);text-decoration:none;border:1px solid var(--line);
  background:var(--card);border-radius:20px;padding:7px 14px;
}
.rb-related-list a:hover{border-color:var(--ledger);}

.rb-back{display:inline-flex;align-items:center;gap:6px;margin-top:28px;font-size:.9rem;color:var(--ledger-deep);text-decoration:none;font-weight:600;}
.rb-back:hover{color:var(--ledger);}

footer{
  padding:36px 0;border-top:1px solid var(--line);font-size:.82rem;color:var(--ink-soft);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
}

@media (max-width:860px){
  nav.links{display:none;}
  .menu-toggle{display:block;}
  .nav > a.btn-primary{display:none;}
  .rb-stats{grid-template-columns:repeat(2,1fr);}
  .rb-toolbar{position:static;}
  .r-step,.r-code-grid{grid-template-columns:1fr;}
  details.block summary{flex-wrap:wrap;}
  .r-table-details summary{flex-wrap:wrap;}
  .r-table-head-row{flex-wrap:wrap;}
  .r-table-meta{width:100%;justify-content:flex-start;}
  section{padding:56px 0;}
}