/* ============================================================
   Preztamos · Centro de aprendizaje (páginas estáticas públicas)
   Identidad de marca: navy #04057b + naranja #fe4d00 (la Zeta).
   Navy = ancla/confianza · Naranja = acción. Tema claro, editorial.
   Fonts de marca: Montserrat (display) + Cabin (cuerpo).
   ============================================================ */

:root {
  /* Marca */
  --navy: #04057b;
  --navy-2: #070966;             /* superficies oscuras / degradado */
  --naranja: #fe4d00;
  --naranja-fuerte: #d94100;     /* hover */
  --naranja-tenue: oklch(0.955 0.04 50);  /* fondos suaves */
  --naranja-borde: oklch(0.87 0.085 50);
  --navy-tenue: oklch(0.95 0.03 268);

  /* Superficies (neutros con leve frío hacia el navy) */
  --papel: oklch(0.989 0.004 260);
  --papel-2: oklch(0.972 0.007 262);
  --tarjeta: #ffffff;
  --linea: oklch(0.9 0.012 262);

  /* Tinta (gris-navy, no negro) */
  --tinta: oklch(0.27 0.045 266);
  --tinta-2: oklch(0.45 0.03 266);
  --tinta-3: oklch(0.6 0.025 266);

  /* Tipografía de marca */
  --display: "Montserrat", system-ui, -apple-system, sans-serif;
  --texto: "Cabin", system-ui, -apple-system, sans-serif;

  /* Espacio 4pt */
  --e-xs: 0.5rem; --e-sm: 0.75rem; --e-md: 1rem; --e-lg: 1.5rem;
  --e-xl: 2rem; --e-2xl: 3rem; --e-3xl: 4rem; --e-4xl: 6rem;

  --radio: 14px;
  --radio-sm: 9px;
  --ancho-prosa: 40rem;
  --ancho-pagina: 70rem;
  --sombra: 0 1px 2px oklch(0.3 0.05 266 / 0.05), 0 8px 28px oklch(0.3 0.05 266 / 0.08);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--texto);
  font-size: clamp(1.04rem, 0.98rem + 0.3vw, 1.18rem);
  line-height: 1.68;
  color: var(--tinta);
  background: var(--papel);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--naranja-fuerte); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1.5px; }
a:hover { color: var(--navy); }
a:focus-visible, summary:focus-visible, .boton:focus-visible {
  outline: 3px solid var(--naranja); outline-offset: 3px; border-radius: 4px;
}
strong { font-weight: 700; color: var(--tinta); }

/* ---------- Layout ---------- */
.contenedor { width: 100%; max-width: var(--ancho-pagina); margin-inline: auto; padding-inline: clamp(1.1rem, 5vw, 2.5rem); }

/* ---------- Encabezado del sitio ---------- */
.sitio-header {
  position: sticky; top: 0; z-index: 20;
  background: oklch(0.989 0.004 260 / 0.85);
  backdrop-filter: saturate(1.3) blur(10px);
  border-bottom: 1px solid var(--linea);
}
.sitio-header .barra { display: flex; align-items: center; gap: var(--e-lg); height: 70px; }
.marca { display: inline-flex; align-items: center; gap: 0.55rem; text-decoration: none; }
.marca img { height: 34px; width: auto; }
.marca img.marca-wordmark { height: 26px; }
.marca .marca-txt {
  font-family: var(--display); font-weight: 800; font-size: 1.32rem;
  letter-spacing: -0.025em; color: var(--navy);
}
.sitio-header nav { margin-left: auto; display: flex; align-items: center; gap: clamp(0.75rem, 2vw, 1.6rem); }
.sitio-header nav a { color: var(--tinta-2); text-decoration: none; font-weight: 600; font-size: 0.97rem; }
.sitio-header nav a:hover { color: var(--navy); }
.sitio-header nav a.activo { color: var(--navy); }

/* ---------- Botones ---------- */
.boton {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--display); font-weight: 600; font-size: 1rem;
  text-decoration: none; cursor: pointer;
  padding: 0.8rem 1.4rem; border-radius: 999px; border: 1px solid transparent;
  transition: transform 0.18s cubic-bezier(0.2,0.8,0.2,1), background-color 0.18s, box-shadow 0.18s;
}
.boton-primario {
  background: var(--naranja); color: #fff;
  box-shadow: 0 6px 18px oklch(0.66 0.225 38 / 0.32);
}
.boton-primario:hover { background: var(--naranja-fuerte); color: #fff; transform: translateY(-2px); }
.boton-fantasma { background: transparent; color: var(--navy); border-color: var(--linea); }
.boton-fantasma:hover { border-color: var(--navy); color: var(--navy); background: var(--papel-2); }
.boton .flecha { transition: transform 0.18s; }
.boton:hover .flecha { transform: translateX(3px); }

/* ---------- Migas de pan ---------- */
.migas { font-size: 0.88rem; color: var(--tinta-3); padding-top: var(--e-xl); }
.migas ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0; padding: 0; }
.migas li { display: flex; gap: 0.4rem; align-items: center; }
.migas li::after { content: "›"; color: var(--naranja); }
.migas li:last-child::after { content: ""; }
.migas a { color: var(--tinta-3); text-decoration: none; }
.migas a:hover { color: var(--navy); }

/* ---------- Cabecera de artículo ---------- */
.articulo-cabecera { max-width: 46rem; margin-block: var(--e-lg) var(--e-2xl); }
.eyebrow {
  display: inline-block; font-family: var(--display); font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.76rem;
  color: var(--naranja-fuerte); background: var(--naranja-tenue);
  padding: 0.35rem 0.7rem; border-radius: 999px; margin-bottom: var(--e-lg);
}
h1.titulo {
  font-family: var(--display); font-weight: 800;
  font-size: clamp(2.1rem, 1.3rem + 3.6vw, 3.5rem);
  line-height: 1.04; letter-spacing: -0.025em; color: var(--navy);
  margin: 0 0 var(--e-lg); text-wrap: balance;
}
.dek {
  font-size: clamp(1.15rem, 1.05rem + 0.5vw, 1.4rem);
  line-height: 1.5; color: var(--tinta-2); margin: 0; max-width: 36rem;
}
.meta-articulo {
  margin-top: var(--e-lg); display: flex; flex-wrap: wrap; gap: 0.4rem 1rem;
  font-size: 0.9rem; color: var(--tinta-3);
}

/* ---------- Prosa ---------- */
.prosa { max-width: var(--ancho-prosa); }
.prosa > * + * { margin-top: var(--e-lg); }
.prosa h2 {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem); line-height: 1.15;
  letter-spacing: -0.02em; color: var(--navy);
  margin-top: var(--e-3xl); margin-bottom: var(--e-sm); text-wrap: balance;
}
.prosa h3 {
  font-family: var(--display); font-weight: 700; font-size: 1.22rem; color: var(--navy);
  margin-top: var(--e-2xl); margin-bottom: 0;
}
.prosa p { margin: 0; }
.prosa ul, .prosa ol { margin: 0; padding-left: 1.3rem; }
.prosa li { margin-top: 0.5rem; padding-left: 0.3rem; }
.prosa li::marker { color: var(--naranja); font-weight: 700; }
.prosa a { font-weight: 600; }

/* Cita / frase ancla */
.prosa blockquote {
  margin: var(--e-2xl) 0; padding: 0;
  font-family: var(--display); font-weight: 600;
  font-size: clamp(1.4rem, 1.1rem + 1.2vw, 1.85rem); line-height: 1.28;
  letter-spacing: -0.015em; color: var(--navy);
}
.prosa blockquote p { margin: 0; }
.prosa blockquote::before { content: "“"; color: var(--naranja); font-size: 1.2em; line-height: 0; vertical-align: -0.3em; margin-right: 0.05em; }

/* ---------- Nota / aclaración (sin border-left) ---------- */
.nota {
  background: var(--naranja-tenue); border: 1px solid var(--naranja-borde);
  border-radius: var(--radio); padding: var(--e-lg); margin-block: var(--e-xl);
}
.nota .nota-etq {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: var(--display); font-weight: 700; font-size: 0.8rem;
  letter-spacing: 0.04em; text-transform: uppercase; color: var(--naranja-fuerte); margin-bottom: 0.4rem;
}
.nota p { margin: 0; color: var(--tinta); }
.nota p + p { margin-top: 0.6rem; }

/* ---------- Caja de claves ---------- */
.claves {
  background: var(--tarjeta); border: 1px solid var(--linea);
  border-radius: var(--radio); padding: var(--e-xl); box-shadow: var(--sombra); margin-block: var(--e-xl);
}
.claves h2, .claves h3 { margin-top: 0 !important; font-family: var(--display); font-weight: 700; font-size: 1.1rem; color: var(--navy); }
.claves ul { list-style: none; padding: 0; margin: var(--e-md) 0 0; }
.claves li { display: grid; grid-template-columns: 1.4rem 1fr; gap: 0.6rem; align-items: start; margin-top: var(--e-md); }
.claves li::before { content: "✓"; color: var(--naranja-fuerte); font-weight: 800; line-height: 1.5; }

/* ---------- Motivo: 1 → +25 ---------- */
.reparto {
  display: grid; grid-template-columns: auto auto 1fr; align-items: center; gap: var(--e-lg);
  background: var(--navy-tenue); border: 1px solid oklch(0.88 0.04 268); border-radius: var(--radio);
  padding: var(--e-xl); margin-block: var(--e-xl);
}
.reparto .uno { text-align: center; }
.reparto .uno .num { font-family: var(--display); font-weight: 800; font-size: 2.6rem; line-height: 1; color: var(--naranja); }
.reparto .uno small { display: block; color: var(--tinta-2); font-size: 0.85rem; margin-top: 0.25rem; }
.reparto .conector { color: var(--naranja); font-size: 1.6rem; }
.reparto .muchas { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.reparto .muchas span {
  background: var(--tarjeta); border: 1px solid var(--linea); border-radius: 999px;
  font-size: 0.8rem; font-weight: 600; color: var(--navy); padding: 0.3rem 0.7rem;
}
@media (max-width: 560px) {
  .reparto { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .reparto .conector { transform: rotate(90deg); }
}

/* ---------- FAQ ---------- */
.faq { margin-block: var(--e-2xl); }
.faq h2 { font-family: var(--display); font-weight: 700; font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2rem); color: var(--navy); margin-bottom: var(--e-lg); }
.faq details { border-top: 1px solid var(--linea); padding: var(--e-md) 0; }
.faq details:last-of-type { border-bottom: 1px solid var(--linea); }
.faq summary {
  display: flex; justify-content: space-between; align-items: center; gap: var(--e-md);
  cursor: pointer; list-style: none; font-family: var(--display); font-weight: 600;
  font-size: 1.12rem; color: var(--navy); padding: 0.4rem 0;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .signo {
  flex: 0 0 auto; width: 1.6rem; height: 1.6rem; border-radius: 999px;
  border: 1px solid var(--naranja-borde); color: var(--naranja-fuerte);
  display: grid; place-items: center; line-height: 1; font-size: 1.1rem; transition: transform 0.2s, background-color 0.2s;
}
.faq details[open] summary .signo { transform: rotate(45deg); background: var(--naranja-tenue); }
.faq details p { margin: 0.4rem 0 0.6rem; color: var(--tinta-2); max-width: var(--ancho-prosa); }

/* ---------- Banda CTA (navy con botón naranja) ---------- */
.cta {
  margin-block: var(--e-3xl);
  background: linear-gradient(135deg, var(--navy), var(--navy-2));
  color: oklch(0.97 0.01 260); border-radius: 22px;
  padding: clamp(2rem, 1rem + 4vw, 3.5rem); position: relative; overflow: hidden;
}
.cta::after {
  content: ""; position: absolute; right: -12%; top: -40%;
  width: 360px; height: 360px; border-radius: 50%;
  background: radial-gradient(circle, oklch(0.66 0.225 38 / 0.55), transparent 70%); pointer-events: none;
}
.cta h2 {
  position: relative; font-family: var(--display); font-weight: 800; color: #fff;
  font-size: clamp(1.6rem, 1.2rem + 1.8vw, 2.4rem); line-height: 1.08;
  letter-spacing: -0.02em; margin: 0 0 var(--e-md); max-width: 22ch; text-wrap: balance;
}
.cta p { position: relative; color: oklch(0.88 0.02 260); margin: 0 0 var(--e-xl); max-width: 46ch; }
.cta .acciones { position: relative; display: flex; flex-wrap: wrap; gap: var(--e-md); }
.cta .boton-fantasma { color: #fff; border-color: oklch(1 0 0 / 0.3); }
.cta .boton-fantasma:hover { background: oklch(1 0 0 / 0.08); border-color: #fff; color: #fff; }

/* ---------- Relacionados ---------- */
.relacionados { margin-block: var(--e-3xl); }
.relacionados h2 { font-family: var(--display); font-weight: 700; font-size: 1.4rem; color: var(--navy); margin-bottom: var(--e-lg); }
.relacionados .rejilla { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: var(--e-md); }
.tarjeta-art {
  display: flex; flex-direction: column; gap: 0.4rem;
  background: var(--tarjeta); border: 1px solid var(--linea); border-radius: var(--radio);
  padding: var(--e-lg); text-decoration: none; color: var(--tinta);
  transition: transform 0.18s cubic-bezier(0.2,0.8,0.2,1), box-shadow 0.18s, border-color 0.18s;
}
.tarjeta-art:hover { transform: translateY(-3px); box-shadow: var(--sombra); border-color: var(--naranja-borde); color: var(--tinta); }
.tarjeta-art .et { font-family: var(--display); font-size: 0.74rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--naranja-fuerte); }
.tarjeta-art h3 { font-family: var(--display); font-weight: 700; font-size: 1.1rem; margin: 0; line-height: 1.2; color: var(--navy); }
.tarjeta-art p { margin: 0; font-size: 0.95rem; color: var(--tinta-2); }
.tarjeta-art .leer { margin-top: auto; font-family: var(--display); font-weight: 600; color: var(--naranja-fuerte); font-size: 0.92rem; }

/* ---------- Pie (navy) ---------- */
.sitio-footer { margin-top: var(--e-4xl); background: var(--navy); color: oklch(0.92 0.015 260); }
.sitio-footer .contenedor { padding-block: var(--e-2xl); }
.sitio-footer .filas { display: flex; flex-wrap: wrap; gap: var(--e-xl); justify-content: space-between; }
.sitio-footer .marca-pie .marca-txt { color: #fff; }
.sitio-footer .marca-pie img { height: 32px; margin-bottom: var(--e-sm); }
.sitio-footer p { color: oklch(0.78 0.02 260); font-size: 0.9rem; max-width: 34ch; margin: 0; }
.sitio-footer nav { display: flex; flex-direction: column; gap: 0.5rem; }
.sitio-footer nav a { color: oklch(0.86 0.02 260); text-decoration: none; font-size: 0.92rem; }
.sitio-footer nav a:hover { color: #fff; }
.sitio-footer .legal { margin-top: var(--e-xl); padding-top: var(--e-lg); border-top: 1px solid oklch(1 0 0 / 0.15); color: oklch(0.7 0.02 260); font-size: 0.82rem; }

/* ---------- Hub /aprende ---------- */
.hub-hero { padding-block: var(--e-3xl) var(--e-xl); max-width: 48rem; }
.hub-rejilla { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: var(--e-lg); margin-block: var(--e-xl) var(--e-2xl); }

/* Saltar al contenido */
.saltar { position: absolute; left: -999px; top: 0; background: var(--naranja); color: #fff; padding: 0.6rem 1rem; border-radius: 0 0 8px 0; z-index: 50; }
.saltar:focus { left: 0; }