:root{--petroleo:#00303C;--verde:#1A946F;--texto:#333C44;--gris:#60696F;--gris2:#7D858B;--borde:#CFDFE4;--borde2:#E6EEF1;--fondo:#F5F8F9;--fondo-verde:#EEF7F3;--subrayado:#9FD6C2;color-scheme:light}
*{box-sizing:border-box}
html{scroll-padding-top:90px}
body{margin:0;font-family:'Poppins',system-ui,sans-serif;color:var(--texto);background:#fff;font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
h1,h2,h3{color:var(--petroleo);font-weight:600;text-wrap:balance;margin:0}
.meta{font-size:13px;color:var(--gris)}
.tema-etq{font-size:13px;color:var(--gris);text-decoration:none}
.saltar{position:absolute;left:-9999px}.saltar:focus{left:16px;top:16px;background:#fff;padding:8px;z-index:50}
.btn{display:inline-block;background:var(--petroleo);color:#fff;border-radius:8px;padding:11px 18px;font-weight:500;font-size:15px;text-decoration:none;line-height:1.3}
.btn:hover{background:#00475A}
.btn--claro{background:#fff;color:var(--petroleo)}.btn--claro:hover{background:var(--fondo-verde)}
:focus-visible{outline:3px solid var(--verde);outline-offset:2px}
.avatar{width:36px;height:36px;border-radius:50%;background:var(--petroleo);color:#fff;display:inline-grid;place-items:center;font-size:13px;font-weight:600;flex:none}
.avatar--grande{width:72px;height:72px;font-size:24px;margin-bottom:12px}
.autor{display:flex;gap:10px;align-items:center}.autor a{text-decoration:none}.autor b{color:var(--petroleo);font-weight:500}
/* Cabecera */
.cab{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--borde)}
.cab__in{max-width:1200px;margin:0 auto;padding:14px 40px;display:flex;align-items:center;gap:28px;position:relative}
.cab__logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--gris);font-size:14px}.cab__logo img{height:26px;width:auto}
.cab__nav{display:flex;gap:24px;margin-left:auto;font-size:14px}.cab__nav a{color:var(--gris);text-decoration:none}.cab__nav a:hover{color:var(--petroleo)}
.cab__menu{display:none;background:none;border:1px solid var(--borde);border-radius:8px;padding:7px 10px;font:inherit;font-size:13px;color:var(--petroleo)}
.cab__cta-corto{display:none}
/* Contenedores */
main>section,main>nav,main>article,main>header{max-width:1200px;margin-left:auto;margin-right:auto;padding-left:40px;padding-right:40px}
/* Portada */
.destacado{display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center;padding-top:48px;padding-bottom:40px}
.destacado h1{font-size:34px;line-height:1.2;margin:8px 0 12px}.destacado h1 a{text-decoration:none}
.destacado p{color:var(--gris);font-size:16px;margin:0 0 18px}
.destacado__img img{border:1px solid var(--borde);border-radius:10px;aspect-ratio:16/10;object-fit:cover;object-position:0 0;width:100%}
.ruta{background:var(--fondo);border-top:1px solid var(--borde);border-bottom:1px solid var(--borde);padding-top:26px;padding-bottom:30px;max-width:none!important}
.ruta>*{max-width:1120px;margin-left:auto;margin-right:auto}
.ruta__cab{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:14px}.ruta__cab h2{font-size:18px}
.ruta__grid{display:grid;grid-template-columns:repeat(5,1fr) 1.25fr;gap:12px}
.paso{background:#fff;border:1px solid var(--borde);border-radius:10px;padding:14px;text-decoration:none}.paso:hover{border-color:var(--verde)}
.paso__n{font-family:'Inter',sans-serif;font-weight:600;color:var(--verde);font-size:13px}.paso h3{font-size:14px;line-height:1.35;margin:6px 0}
.ejemplo-tarjeta{background:var(--petroleo);border-radius:10px;padding:14px 16px;color:#fff;text-decoration:none;display:flex;flex-direction:column;gap:8px}
.ejemplo-tarjeta b{font-weight:600;font-size:14px}.ejemplo-tarjeta span{font-size:12px;color:rgba(255,255,255,.78);line-height:1.45}.ejemplo-tarjeta .ejemplo-tarjeta__enlace{color:#7FD3B4;font-weight:500;font-size:13px}
.fila{padding-top:32px;padding-bottom:8px}
.fila__cab{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:14px}.fila__cab h2{font-size:18px}.fila__cab a{font-size:13px;color:var(--verde);text-decoration:none}
.rejilla3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.tarjeta{text-decoration:none;display:flex;flex-direction:column;gap:6px;background:#fff;border:1px solid var(--borde);border-radius:10px;padding:18px 18px 16px;overflow:hidden;transition:border-color .15s}
.tarjeta:hover{border-color:var(--verde)}
.tarjeta__img{display:block;margin:-18px -18px 10px;width:calc(100% + 36px);max-width:none;border-bottom:1px solid var(--borde);aspect-ratio:16/9;object-fit:cover;object-position:0 0}
.tarjeta__titulo{font-size:16px;line-height:1.38}
.tarjeta__desc{margin:0;font-size:14px;line-height:1.55;color:var(--gris);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.tarjeta .meta{margin-top:auto;padding-top:4px}
.tarjeta:hover .tarjeta__titulo{text-decoration:underline;text-decoration-color:var(--subrayado);text-underline-offset:3px}
.todos{padding-top:28px;padding-bottom:48px}.todos h2{font-size:18px;margin-bottom:8px}
.todos ul{list-style:none;margin:0;padding:0}.todos li{display:flex;justify-content:space-between;gap:16px;padding:11px 0;border-bottom:1px solid var(--borde2)}
.todos li a{text-decoration:none;color:var(--petroleo);font-size:15px}.todos li a:hover{text-decoration:underline}
.todos li .meta{white-space:nowrap}
/* Tema, guías, autor */
.migas{padding-top:18px;font-size:13px;color:var(--gris)}.migas a{color:var(--gris)}
.tema-cab{padding-top:28px;padding-bottom:8px;max-width:820px!important}.tema-cab h1{font-size:34px;margin:6px 0 12px}
.tema-intro{font-size:17px;line-height:1.75}.tema-intro p{margin:0 0 14px}
.tema-intro a{color:var(--petroleo);text-decoration-color:var(--subrayado);text-decoration-thickness:2px;text-underline-offset:3px}
/* Artículo */
.art-cab{max-width:908px;margin:0 auto;padding-top:14px;padding-left:268px!important;padding-right:0!important}
.art-cab h1{font-size:38px;line-height:1.18;margin:8px 0 14px}
.art-cab__entr{font-size:19px;line-height:1.6;margin:0 0 18px}
.art-cab .autor{padding:14px 0;border-top:1px solid var(--borde2);border-bottom:1px solid var(--borde2)}
.art-cab .autor .meta{margin:0}
.art-img{max-width:908px;margin:26px auto 0;padding:0 0 0 268px}.art-img img{border:1px solid var(--borde);border-radius:10px}
.art-img figcaption{font-size:12px;color:var(--gris);margin-top:8px}
.art-cuerpo{display:grid;grid-template-columns:220px minmax(0,640px);gap:48px;justify-content:center;padding:34px 0 10px}
.indice{position:sticky;top:90px;align-self:start;font-size:13px}
.indice__t{color:var(--gris);font-size:12px;margin:0 0 8px}
.indice ol,.indice-movil ol{list-style:none;margin:0;padding:0}
.indice a{display:block;padding:6px 0 6px 12px;border-left:2px solid var(--borde2);color:var(--gris);text-decoration:none}
.indice a:hover{color:var(--petroleo);border-color:var(--verde)}
.indice-movil{display:none;border:1px solid var(--borde);border-radius:8px;padding:10px 12px;margin:0 0 18px;font-size:14px;color:var(--petroleo)}
.indice-movil summary{cursor:pointer}.indice-movil li{padding:5px 0}.indice-movil a{color:var(--petroleo)}
.lectura{font-size:17px;line-height:1.75;min-width:0}
.lectura h2{font-size:25px;line-height:1.3;margin:36px 0 12px}
.lectura h3{font-size:19px;margin:26px 0 8px}
.lectura p,.lectura ul,.lectura ol{margin:0 0 16px}
.lectura li{margin-bottom:6px}
.lectura a{color:var(--petroleo);text-decoration:underline;text-decoration-color:var(--subrayado);text-decoration-thickness:2px;text-underline-offset:3px}
.lectura a.btn{color:#fff;text-decoration:none}
.lectura blockquote{margin:20px 0;padding-left:16px;border-left:3px solid var(--borde);color:var(--gris)}
.opinion{background:var(--fondo-verde);border-left:3px solid var(--verde);border-radius:0 8px 8px 0;padding:14px 18px;margin:22px 0;font-size:16px}
.opinion p{margin:0}.opinion .opinion__titulo{color:var(--petroleo);font-weight:600;margin-bottom:4px}
.tabla{overflow-x:auto;border:1px solid var(--borde);border-radius:10px;margin:18px 0 22px}
.tabla table{width:100%;border-collapse:collapse;font-size:14px;min-width:420px}
.tabla th{background:var(--fondo);text-align:left;padding:10px 14px;color:var(--petroleo);font-weight:600}
.tabla td{padding:10px 14px;border-top:1px solid var(--borde2);vertical-align:top;font-variant-numeric:tabular-nums}
.caja{border:1px solid var(--borde);border-radius:10px;padding:18px;margin:26px 0;display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center;font-size:15px;line-height:1.55}
.caja p{margin:0 0 10px}.caja .caja__titulo{color:var(--petroleo);font-weight:600;font-size:16px;margin-bottom:6px}
.caja .caja__precio{font-size:12px;color:var(--gris);margin:10px 0 0}
.caja__img{width:220px;border:1px solid var(--borde);border-radius:8px}
.caja--revision,.caja--ejemplo{background:var(--fondo)}
.faq details{border-bottom:1px solid var(--borde2);padding:12px 0}.faq summary{cursor:pointer;color:var(--petroleo);font-weight:500}.faq details p{margin:8px 0 0}
.ficha-autor{display:flex;gap:14px;align-items:flex-start;border-top:1px solid var(--borde2);padding-top:20px;margin-top:30px;font-size:15px;line-height:1.6}
.ficha-autor .avatar{width:48px;height:48px;font-size:15px}.ficha-autor p{margin:0}.ficha-autor b{color:var(--petroleo)}
.relacionados{padding-top:30px;padding-bottom:40px}.relacionados h2{font-size:18px;margin-bottom:14px}
.fija{max-width:760px!important;padding-top:32px;padding-bottom:48px}.fija h1{font-size:32px;margin-bottom:16px}
/* Banda final y pie */
.banda-final{background:var(--petroleo);color:#fff;max-width:none!important;padding:36px 40px}
.banda-final__in{max-width:1120px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:30px}
.banda-final h2{color:#fff;font-size:22px;margin-bottom:6px}.banda-final p{margin:0;color:rgba(255,255,255,.8);font-size:14px}
.banda-final__acc{text-align:right;flex:none}.banda-final__acc p{margin-top:10px;font-size:12px}.banda-final__acc p a{color:#7FD3B4}
.pie{background:var(--petroleo);border-top:1px solid rgba(255,255,255,.12);color:rgba(255,255,255,.75);font-size:13px;line-height:1.9}
.pie__in{max-width:1200px;margin:0 auto;padding:28px 40px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px}
.pie a{display:block;color:rgba(255,255,255,.75);text-decoration:none}.pie a:hover{color:#fff}
.pie .pie__t{color:#fff;font-weight:600;margin:0 0 4px}.pie p{margin:0}
/* Pantallas medianas */
@media (max-width:1199px){.art-cuerpo{grid-template-columns:minmax(0,640px);padding-left:0;padding-right:0}.art-cab{max-width:640px;padding-left:0!important}.art-img{max-width:640px;padding:0}.indice{display:none}.indice-movil{display:block}}
@media (max-width:960px){.ruta__grid{grid-template-columns:repeat(3,1fr)}.ejemplo-tarjeta{grid-column:span 3}.destacado{grid-template-columns:1fr}.rejilla3{grid-template-columns:repeat(2,1fr)}.pie__in{grid-template-columns:1fr 1fr}}
/* Móvil */
@media (max-width:640px){
  main>section,main>nav,main>article,main>header{padding-left:16px;padding-right:16px}
  .cab__in{padding:10px 16px;gap:10px}.cab__nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--borde);flex-direction:column;padding:12px 16px;gap:14px}
  .cab__nav.abierto{display:flex}.cab__menu{display:block;order:3}.cab__cta{margin-left:auto;padding:8px 12px;font-size:13px}
  .cab__cta-largo{display:none}.cab__cta-corto{display:inline}
  .destacado{padding-top:28px}.destacado h1,.tema-cab h1{font-size:26px}.art-cab h1{font-size:27px}.art-cab__entr{font-size:17px}
  .ruta__grid{grid-template-columns:1fr 1fr}.ejemplo-tarjeta{grid-column:span 2}
  .rejilla3{grid-template-columns:1fr}
  .art-img{padding:0}.art-cuerpo{padding:22px 0 0}
  .lectura{font-size:16px}.lectura h2{font-size:22px}
  .caja{grid-template-columns:1fr}.caja__img{width:100%}
  .banda-final{padding:28px 16px}.banda-final__in{flex-direction:column;align-items:flex-start}.banda-final__acc{text-align:left}
  .todos li{flex-direction:column;gap:2px}.pie__in{grid-template-columns:1fr;padding:24px 16px}
}
/* Ilustraciones por tema (mientras no haya imágenes propias) */
.portada{display:grid;place-items:center;margin:-18px -18px 12px;height:128px;color:var(--petroleo);border-bottom:1px solid var(--borde)}
.portada svg{height:92px;width:auto}
.portada .ac,.paso__icono .ac,.destacado__img--ilustrada .ac{fill:var(--verde)}
.portada--t01{background:#E3F2EC}.portada--t01 .su{fill:#C5E6D7}
.portada--t02{background:#E4EEF1}.portada--t02 .su{fill:#C4DAE2}
.portada--t03{background:var(--petroleo);color:#EAF4F1}.portada--t03 .su{fill:rgba(255,255,255,.16)}.portada--t03 .ac{fill:#22B98B}
.portada--t04{background:#D9EEE5}.portada--t04 .su{fill:#B3DBCA}
.portada--t05{background:#EAF0F2}.portada--t05 .su{fill:#CFDFE4}
.tarjeta:hover .portada{filter:saturate(1.15)}
.destacado__img--ilustrada{display:grid;place-items:center;aspect-ratio:16/10;border-radius:10px;border:1px solid var(--borde);overflow:hidden}
.destacado__img--ilustrada svg{width:62%;height:auto}
.paso__icono{display:block;margin-bottom:8px;color:var(--petroleo)}
.paso__icono svg{height:40px;width:auto;display:block}
.paso__icono .su{fill:#DDEEE7}
@media (max-width:640px){.portada{height:108px}.portada svg{height:78px}}