/* RGNERA — sistema de diseño v1. Paleta de brand.py (rgnera-factory). */
:root{
  --olive:#475323; --ink:#20261A; --salvia:#8D9A88; --greige:#BFB4A0;
  --cream:#F5F1E6; --amber:#C58A2E; --clay:#B5765A; --sage:#AEB98C;
  --card:#FFFDF7; --line:#E3DCCB; --amber-ink:#3d2907;
  --ff-display:"Playfair Display",Georgia,"Times New Roman",serif;
  --ff-ui:"Poppins","Segoe UI",-apple-system,Roboto,sans-serif;
  --ff-lectura:"Lora",Georgia,serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--cream);color:var(--ink);font-family:var(--ff-ui);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.shell{max-width:1120px;margin:0 auto;padding:0 24px}
:focus-visible{outline:3px solid var(--amber);outline-offset:2px;border-radius:4px}
.salto{position:absolute;left:-9999px;top:0;background:var(--olive);color:var(--cream);
  padding:10px 18px;border-radius:0 0 10px 0;z-index:99;font-weight:500}
.salto:focus{left:0}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
  html{scroll-behavior:auto}
}

/* ---------- Header ---------- */
.topbar{position:sticky;top:0;z-index:50;background:var(--cream);
  border-bottom:1px solid var(--line)}
.topbar .shell{display:flex;align-items:center;gap:28px;height:64px}
.marca{display:flex;align-items:center;gap:10px;flex-shrink:0}
.marca img{width:34px;height:34px}
.marca b{font-family:var(--ff-ui);font-weight:600;letter-spacing:2.5px;
  font-size:17px;color:var(--olive)}
.nav{display:flex;gap:22px;align-items:center;font-size:14px;font-weight:500}
.nav a{color:var(--ink);padding:6px 2px;border-bottom:2px solid transparent}
.nav a:hover{color:var(--olive)}
.nav a.activo{color:var(--olive);border-bottom-color:var(--amber)}
.has-sub{position:relative}
.has-sub .flecha{font-size:10px;color:var(--salvia)}
.submenu{display:none;position:absolute;top:100%;left:-14px;z-index:60;
  background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:8px;min-width:250px}
.has-sub:hover .submenu,.has-sub:focus-within .submenu{display:block}
.submenu a{display:block;padding:9px 14px;border-radius:8px;font-size:14px;
  border-bottom:none;color:var(--ink)}
.submenu a:hover{background:var(--cream);color:var(--olive)}
.submenu .sub-todos{font-weight:600;color:var(--olive);
  border-bottom:1px solid var(--line);border-radius:8px 8px 0 0;margin-bottom:4px}
.empuje{margin-left:auto}
.btn-calc{background:var(--amber);color:var(--amber-ink);font-weight:600;
  font-size:14px;padding:9px 18px;border-radius:999px;white-space:nowrap;
  transition:transform .15s ease,box-shadow .15s ease}
.btn-calc:hover{transform:translateY(-1px)}
.menu-btn{display:none}

/* ---------- Hero ---------- */
.hero{padding:72px 0 40px}
.hero .eyebrow{font-size:12px;font-weight:600;letter-spacing:3px;
  color:var(--salvia);text-transform:uppercase;margin-bottom:14px}
.hero h1{font-family:var(--ff-display);font-weight:700;color:var(--olive);
  font-size:clamp(34px,5vw,54px);line-height:1.12;max-width:640px}
.hero p{margin:18px 0 26px;font-size:18px;color:rgba(32,38,26,.82);max-width:560px}
.hero .acciones{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.btn-primario{background:var(--amber);color:var(--amber-ink);font-weight:600;
  font-size:15px;padding:13px 24px;border-radius:10px;border:none;cursor:pointer;
  font-family:var(--ff-ui);transition:transform .15s ease}
.btn-primario:hover{transform:translateY(-2px)}
.link-sec{color:var(--olive);font-weight:500;font-size:15px;
  border-bottom:2px solid var(--amber)}

/* ---------- Newsletter ---------- */
.news-banda{margin:34px 0 8px;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:22px 26px;display:flex;gap:20px;align-items:center;
  flex-wrap:wrap;justify-content:space-between}
.news-banda .texto b{font-family:var(--ff-display);font-size:18px;color:var(--olive)}
.news-banda .texto span{display:block;font-size:13.5px;color:rgba(32,38,26,.7)}
.news-form{display:flex;gap:10px;flex-wrap:wrap}
.news-form input{font-family:var(--ff-ui);font-size:14px;padding:11px 16px;
  border:1px solid var(--line);border-radius:10px;background:#fff;min-width:240px;color:var(--ink)}
.news-form input:focus{border-color:var(--olive)}
.btn-olivo{background:var(--olive);color:var(--cream);font-weight:500;font-size:14px;
  padding:11px 20px;border-radius:10px;border:none;cursor:pointer;font-family:var(--ff-ui)}
.btn-olivo:hover{background:#39431c}

/* ---------- Filas de artículos ---------- */
.fila{padding:34px 0 6px}
.fila-cab{display:flex;align-items:baseline;justify-content:space-between;
  margin-bottom:18px;gap:12px}
.fila-cab h2{font-family:var(--ff-display);font-weight:700;font-size:26px;color:var(--olive)}
.ver-todo{color:var(--amber-ink);background:transparent;font-weight:600;font-size:13px;
  white-space:nowrap;color:var(--amber)}
.ver-todo:hover{text-decoration:underline}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid.g4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- Tarjeta ---------- */
.tarjeta{background:var(--card);border:1px solid var(--line);border-radius:12px;
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .18s ease,border-color .18s ease}
.tarjeta:hover{transform:translateY(-3px);border-color:var(--amber)}
.tarjeta .thumb{aspect-ratio:16/9;overflow:hidden;background:#eae3d0}
.tarjeta .thumb img{width:100%;height:100%;object-fit:cover}
.tarjeta .cuerpo{padding:16px 18px 18px;display:flex;flex-direction:column;gap:9px;flex:1}
.pill{align-self:flex-start;font-size:10.5px;font-weight:600;letter-spacing:1.2px;
  text-transform:uppercase;color:var(--olive);background:var(--cream);
  border:1px solid var(--line);padding:3px 10px;border-radius:999px}
.tarjeta h3{font-family:var(--ff-display);font-weight:700;font-size:19px;
  line-height:1.25;color:var(--ink)}
.tarjeta .extracto{font-size:13.5px;color:rgba(32,38,26,.75);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.tarjeta .meta{margin-top:auto;font-size:12px;color:var(--greige);padding-top:4px}

/* ---------- Banda calculadora ---------- */
.banda-calc{margin:48px 0;background:var(--olive);border-radius:18px;
  color:var(--cream);padding:44px 46px;display:flex;gap:30px;align-items:center;
  justify-content:space-between;flex-wrap:wrap;position:relative;overflow:hidden}
.banda-calc:before{content:"CO₂e";position:absolute;right:-20px;top:-38px;
  font-family:var(--ff-display);font-size:150px;font-weight:700;opacity:.07}
.banda-calc h2{font-family:var(--ff-display);font-size:30px;font-weight:700;max-width:440px}
.banda-calc p{color:var(--sage);margin-top:10px;font-size:15px;max-width:460px}
.banda-calc .btn-primario{flex-shrink:0}

/* ---------- Videos ---------- */
.video-marco{aspect-ratio:16/9;border-radius:12px;overflow:hidden;
  border:1px solid var(--line);background:#000}
.video-marco iframe{width:100%;height:100%;border:0}
.video-titulo{font-family:var(--ff-display);font-size:17px;font-weight:700;
  color:var(--ink);margin-top:10px}

/* ---------- Footer ---------- */
footer{margin-top:70px;background:var(--ink);color:var(--cream)}
footer .shell{padding:46px 24px 34px;display:grid;
  grid-template-columns:2fr 1fr 1fr;gap:34px}
footer .marca b{color:var(--cream)}
footer .tag{margin-top:12px;font-size:13.5px;color:var(--sage);max-width:300px}
footer h4{font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase;
  color:var(--greige);margin-bottom:12px}
footer ul{list-style:none;display:flex;flex-direction:column;gap:8px;font-size:14px}
footer ul a:hover{color:var(--amber)}
.pie-legal{border-top:1px solid rgba(245,241,230,.15)}
.pie-legal .shell{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding:16px 24px;font-size:12.5px;color:var(--greige)}

/* ---------- Página de artículo ---------- */
.articulo{max-width:720px;margin:0 auto;padding:46px 24px 0}
.migas{font-size:13.5px;font-weight:600;color:var(--amber)}
.articulo h1{font-family:var(--ff-display);font-weight:700;color:var(--olive);
  font-size:clamp(30px,4.5vw,42px);line-height:1.15;margin:16px 0 14px}
.articulo .meta-post{display:flex;gap:10px;flex-wrap:wrap;align-items:center;
  font-size:13.5px;color:rgba(32,38,26,.65);margin-bottom:26px}
.articulo .meta-post .sep{color:var(--greige)}
.articulo .portada{border-radius:14px;overflow:hidden;border:1px solid var(--line);
  margin-bottom:34px}
.prosa{font-family:var(--ff-lectura);font-size:18.5px;line-height:1.75;color:var(--ink)}
.prosa p{margin-bottom:1.35em}
.prosa h2{font-family:var(--ff-display);color:var(--olive);font-size:26px;
  margin:1.6em 0 .6em;line-height:1.25}
.prosa h3{font-family:var(--ff-display);color:var(--olive);font-size:21px;margin:1.4em 0 .5em}
.prosa ul,.prosa ol{margin:0 0 1.35em 1.4em}
.prosa li{margin-bottom:.45em}
.prosa img{border-radius:12px;margin:1.8em auto}
.prosa a{color:var(--olive);border-bottom:2px solid var(--amber)}
.prosa blockquote{border-left:3px solid var(--amber);padding-left:18px;
  color:rgba(32,38,26,.75);font-style:italic;margin-bottom:1.35em}
.caja-sub{margin:50px 0 0;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:26px 28px;text-align:center}
.caja-sub b{font-family:var(--ff-display);font-size:20px;color:var(--olive);display:block}
.caja-sub span{font-size:14px;color:rgba(32,38,26,.7);display:block;margin:8px 0 16px}
.caja-sub .news-form{justify-content:center}
.prevnext{max-width:720px;margin:0 auto;padding:28px 24px 0;display:flex;
  justify-content:space-between;gap:14px;font-size:14px;font-weight:500}
.prevnext a{color:var(--olive);max-width:46%}
.prevnext a:hover{color:var(--amber)}

/* ---------- Índice de artículos / categorías ---------- */
.cab-seccion{padding:52px 0 8px}
.cab-seccion h1{font-family:var(--ff-display);font-weight:700;color:var(--olive);
  font-size:clamp(30px,4.5vw,44px)}
.cab-seccion p{margin-top:10px;color:rgba(32,38,26,.75);max-width:560px;font-size:16px}
.filtros{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0 6px}
.filtros a{font-size:12.5px;font-weight:600;padding:7px 15px;border-radius:999px;
  border:1px solid var(--line);background:var(--card);color:var(--ink)}
.filtros a:hover{border-color:var(--amber)}
.filtros a.activo{background:var(--olive);border-color:var(--olive);color:var(--cream)}

/* ---------- Página calculadora ---------- */
.calc-intro{padding:52px 0 26px;text-align:center}
.calc-intro h1{font-family:var(--ff-display);font-weight:700;color:var(--olive);
  font-size:clamp(30px,4.5vw,44px)}
.calc-intro p{margin:12px auto 0;color:rgba(32,38,26,.78);max-width:620px;font-size:16.5px}
.calc-nota{text-align:center;font-size:13px;color:var(--greige);padding:18px 0 8px}
.calc-nota a{color:var(--olive);border-bottom:1px solid var(--amber)}
#marco-calc{width:100%;border:0;display:block}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .grid,.grid.g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  footer .shell{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .shell{padding:0 16px}
  .topbar .shell{height:58px;gap:14px}
  .nav{position:fixed;inset:58px 0 auto 0;background:var(--cream);
    flex-direction:column;align-items:flex-start;gap:0;padding:8px 20px 16px;
    border-bottom:1px solid var(--line);display:none}
  .nav.abierto{display:flex}
  .nav a{padding:12px 0;font-size:16px;width:100%}
  .has-sub{width:100%}
  .submenu{display:block;position:static;border:none;background:transparent;
    padding:0 0 4px 16px;min-width:0}
  .submenu a{padding:9px 0;font-size:15px}
  .submenu .sub-todos{border-bottom:none;margin-bottom:0}
  .has-sub .flecha{display:none}
  .menu-btn{display:block;background:none;border:none;cursor:pointer;
    font-size:26px;color:var(--olive);line-height:1;padding:4px 8px}
  .hero{padding:44px 0 30px}
  .grid,.grid.g4{grid-template-columns:1fr}
  .banda-calc{padding:32px 24px}
  footer .shell{grid-template-columns:1fr;gap:26px}
  .btn-calc{padding:8px 14px;font-size:13px}
}