:root{
  --bg:#0b0e12; --elev:#10151b; --card:#141b23; --text:#e8edf5; --muted:#9fb1c9;
  --brand:#4fa3ff; --brand2:#19c5aa; --border:#223243; --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:14px; --radius-lg:18px;
  --header-h:68px;
}
@media (max-width:900px){ :root{ --header-h:60px } }

/* ===== Base ===== */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,Helvetica,Arial;
  background:var(--bg);color:var(--text);line-height:1.6;
  padding-top:var(--header-h);
  overflow-x:hidden;                    /* sin scroll horizontal */
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.muted{color:var(--muted)}
.container{width:min(1200px,92vw);margin-inline:auto}

/* ⬇️ ahora el contenedor ocupa TODO el ancho sin provocar scroll lateral */
.container-wide{width:100%;max-width:none;margin:0}
.section-padded{padding:1.2rem 0}

/* Botones */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.45rem;border:none;font-weight:700;padding:.65rem .9rem;border-radius:12px;cursor:pointer;transition:.2s transform,.2s opacity;box-shadow:var(--shadow);color:var(--text)}
.btn.small{padding:.45rem .7rem;box-shadow:none;border:1px solid var(--border);background:transparent}
.btn:active{transform:translateY(1px)}

/* ===== Scrollbars unificados ===== */
html{scrollbar-color:color-mix(in oklab,var(--brand)70%,var(--brand2)) var(--elev);scrollbar-width:thin}
*::-webkit-scrollbar{width:10px;height:10px}
*::-webkit-scrollbar-track{background:var(--elev);border-left:1px solid var(--border)}
*::-webkit-scrollbar-thumb{background:linear-gradient(180deg,var(--brand),var(--brand2));border-radius:10px;border:2px solid var(--elev)}
*::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg,var(--brand2),var(--brand))}

/* ===== Header (igual index) ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:color-mix(in oklab,var(--bg)88%,transparent);backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h);padding:0}
.brand{display:flex;align-items:center}
.brand-logo{height:40px}
.nav{display:flex;align-items:center;gap:1rem;position:relative}
.nav-menu,.nav-menu ul,.nav-menu li{list-style:none;margin:0;padding:0}
.nav-menu>li{display:inline-flex;align-items:center;white-space:nowrap}
.nav-link{display:inline-flex;align-items:center;padding:.55rem .9rem;border-radius:10px;font-weight:700;font-size:1.05rem;transition:background-color .2s,color .2s}
.nav-link:hover,.nav-link:focus-visible{background:color-mix(in oklab,var(--brand)18%,transparent);color:#fff}
.nav-link.active{background:color-mix(in oklab,var(--brand)22%,transparent);color:#fff}
.nav-toggle{display:inline-grid;gap:4px;padding:.35rem;border:1px solid var(--border);background:var(--elev);border-radius:9px}
.nav-toggle-bar{width:20px;height:2px;background:var(--text)}
.nav-panel{position:fixed;inset:var(--header-h)0 0 0;background:rgba(0,0,0,.45);opacity:0;pointer-events:none;transition:.2s opacity}
.nav-panel.open{opacity:1;pointer-events:auto}
.nav-menu{position:fixed;left:0;right:0;top:var(--header-h);transform:translateY(-8px);opacity:0;pointer-events:none;background:var(--elev);border-top:1px solid var(--border);display:grid;gap:.5rem;padding:1rem;transition:.2s transform,.2s opacity;max-height:calc(100vh - var(--header-h));overflow:auto}
.nav-menu.open{transform:translateY(0);opacity:1;pointer-events:auto}
@media (min-width:1100px){
  .nav-toggle{display:none}.nav-panel{display:none}
  .nav-menu{position:static;transform:none;opacity:1;pointer-events:auto;display:flex;gap:.35rem;padding:0;background:transparent;border:none;max-height:none;overflow:visible;flex-wrap:nowrap}
}

/* Título */
.section-title{
  display:block;text-align:center;
  font-size:1.8rem;font-weight:900;letter-spacing:.6px;text-transform:uppercase;
  margin:0 0 1rem;
}

/* ===== Layout a pantalla completa ===== */
.blog-grid{
  display:grid;
  grid-template-columns:clamp(260px, 22vw, 380px) 1fr;  /* sidebar flexible + lector ocupa resto */
  grid-template-areas:"sidebar reader";
  gap:1rem;
  padding:0 1rem;      /* respiración en bordes */
  overflow:hidden;     /* evita desbordes horizontales del grid */
}
@media (max-width:1000px){
  .blog-grid{grid-template-columns:1fr;grid-template-areas:"sidebar" "reader";padding:0 .6rem}
}

/* Sidebar (alto de viewport) */
.sidebar{
  grid-area:sidebar;
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:1rem;position:sticky;top:calc(var(--header-h) + 10px);
  max-height:calc(100vh - var(--header-h) - 20px);
  overflow:auto;
}
.sidebar-actions{display:flex;gap:.5rem;align-items:center;margin-bottom:.8rem;flex-wrap:wrap}
.searchbar{display:flex;align-items:center;border:1px solid var(--border);background:var(--elev);padding:.45rem .6rem;border-radius:10px;width:100%}
.searchbar input{flex:1;background:transparent;border:none;color:var(--text);outline:none}

/* Árbol */
.tree{display:grid;gap:.25rem}
.tree-group{margin:.25rem 0}
.tree-section{
  width:100%;text-align:left;display:flex;align-items:center;justify-content:space-between;
  background:var(--elev);color:var(--text);border:1px solid var(--border);border-radius:10px;
  padding:.6rem .7rem;cursor:pointer
}
.tree-section[aria-expanded="true"]{outline:2px solid color-mix(in oklab,var(--brand) 50%, transparent)}
.tree-list{margin:.25rem 0 .4rem .25rem;padding-left:.5rem;border-left:1px dashed var(--border);display:grid;gap:.25rem}
.tree-item{display:grid;grid-template-columns:1fr;align-items:center;gap:.6rem;padding:.55rem .65rem;border-radius:10px;border:1px solid transparent;cursor:pointer}
.tree-item:hover{background:var(--elev);border-color:var(--border)}
.tree-item.active{background:color-mix(in oklab,var(--brand)10%,transparent);border-color:color-mix(in oklab,var(--brand)40%,transparent)}

/* ===== Lector: lleno de alto visible ===== */
.reader{grid-area:reader;min-width:0}
.reader .reader-inner{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:1rem;box-shadow:var(--shadow);
  height:calc(100vh - var(--header-h) - 20px);  /* ocupa toda la altura útil */
  display:flex;flex-direction:column;gap:.6rem;
  overflow:hidden;                                /* sin scroll horizontal */
}

/* El visor crece para llenar el espacio disponible */
.ratio{
  flex:1 1 auto; min-height:0;
  background:#000;border-radius:12px;overflow:hidden;
}
.ratio iframe{
  position:relative; inset:auto;           /* ya no absoluto */
  width:100%; height:100%;
  border:0; display:block;
}

.article-title{margin:.2rem 0 0;font-size:1.15rem}
.article-meta{margin:0}

/* (scrollbars ya están unificados arriba) */