:root {
  --fondo: #182226;
  --superficie: #243136;
  --texto: #E9EFF0;
  --acento: #33B4A6;
  --apagado: #849699;
  --tinta: #10191C;
  --linea: rgba(132, 150, 153, .28);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--fondo);
  color: var(--texto);
  font-family: "Libre Franklin", sans-serif;
  font-weight: 400;
  line-height: 1.72;
  min-height: 100vh;
}

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

a {
  color: var(--acento);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

a:hover {
  color: #E9EFF0;
  text-decoration-color: var(--acento);
}

:focus-visible {
  outline: 2px solid var(--acento);
  outline-offset: 3px;
}

.salto-contenido {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 80;
  background: var(--acento);
  color: var(--tinta);
  padding: 8px 14px;
  font-weight: 600;
}

.salto-contenido:focus {
  left: 12px;
  top: 12px;
  color: var(--tinta);
}

/* Riel lateral */
.riel-palanca {
  display: none;
  position: fixed;
  top: 14px;
  right: 16px;
  z-index: 50;
  width: 44px;
  height: 36px;
  border: 1px solid var(--linea);
  border-radius: 4px;
  background: var(--superficie);
  color: var(--texto);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0;
}

.riel-palanca span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--texto);
}

.riel {
  position: fixed;
  inset: 0 auto 0 0;
  width: 236px;
  background: var(--superficie);
  border-right: 1px solid var(--linea);
  overflow-y: auto;
  z-index: 40;
  padding: 28px 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.riel-marca {
  display: block;
  text-decoration: none;
  color: var(--texto);
}

.riel-marca:hover {
  color: var(--texto);
  text-decoration: none;
}

.riel-marca svg {
  display: block;
  width: 26px;
  height: 26px;
  margin-bottom: 10px;
}

.riel-marca strong {
  display: block;
  font-family: "Libre Baskerville", serif;
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.riel-marca em {
  display: block;
  margin-top: 6px;
  font-style: normal;
  color: var(--apagado);
  font-size: 0.74rem;
  line-height: 1.45;
}

.riel-lista {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.riel-enlace {
  display: block;
  padding: 7px 10px 7px 12px;
  color: var(--apagado);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  border-left: 2px solid transparent;
}

.riel-enlace:hover {
  color: var(--texto);
  text-decoration: none;
}

.riel-enlace--activo {
  color: var(--texto);
  border-left-color: var(--acento);
}

.riel-contacto {
  border-top: 1px solid var(--linea);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--apagado);
  line-height: 1.5;
}

.riel-contacto a {
  color: var(--acento);
  text-decoration: none;
}

.riel-contacto a:hover {
  color: #E9EFF0;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--acento);
}

.riel p {
  margin-top: auto;
  color: var(--apagado);
  font-size: 0.72rem;
  line-height: 1.45;
}

/* Columna de lectura */
.lectura {
  margin-left: 236px;
  min-height: 100vh;
}

.columna {
  max-width: 696px;
  margin-inline: auto;
  padding-inline: 24px;
}

.columna--suelta {
  max-width: 1020px;
}

.par-desigual {
  display: grid;
  grid-template-columns: 1.09fr 0.91fr;
  gap: 34px;
  align-items: start;
}

/* Portada */
.portada {
  position: relative;
  min-height: clamp(340px, 46vh, 460px);
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: flex-end;
}

.portada--legal {
  min-height: 260px;
  background-image: linear-gradient(140deg, #243136, #182226);
}

.portada__velo {
  width: 100%;
  min-height: inherit;
  display: flex;
  align-items: flex-end;
  background: linear-gradient(180deg, rgba(24, 34, 38, .72) 0%, rgba(24, 34, 38, .88) 100%);
  padding: 48px 0 40px;
}

.portada--legal .portada__velo {
  background: transparent;
}

.portada__texto {
  padding-bottom: 8px;
}

.portada__kicker {
  margin: 0 0 10px;
  font-family: "Libre Franklin", sans-serif;
  font-weight: 600;
  font-size: 0.76rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--acento);
}

.portada h1,
.titular {
  font-family: "Libre Baskerville", serif;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.18;
  margin: 0 0 16px;
}

.portada h1 {
  font-size: clamp(2.05rem, 1.3rem + 2.4vw, 3.15rem);
}

.titular {
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
}

h3 {
  font-family: "Libre Franklin", sans-serif;
  font-size: 1.18rem;
  font-weight: 600;
  letter-spacing: .02em;
  margin: 0 0 10px;
  line-height: 1.35;
}

.portada__sub {
  margin: 0 0 22px;
  font-family: "Libre Baskerville", serif;
  font-style: italic;
  font-size: 1.1rem;
  color: rgba(233, 239, 240, .88);
  max-width: 78ch;
}

.portada__acciones {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* Bloques */
.bloque {
  padding: 56px 0 8px;
}

.bloque--fondo {
  background: var(--superficie);
  margin-top: 48px;
  padding: 56px 0 48px;
}

.bloque:last-of-type {
  padding-bottom: 64px;
}

.lead {
  font-family: "Libre Baskerville", serif;
  font-style: italic;
  font-size: 1.08rem;
  color: rgba(233, 239, 240, .92);
  max-width: 78ch;
  margin: 0 0 22px;
}

.parrafo {
  max-width: 78ch;
  margin: 0 0 18px;
}

.parrafo:last-child {
  margin-bottom: 0;
}

.nota-fuente {
  margin: 14px 0 0;
  font-size: 0.78rem;
  color: var(--apagado);
  line-height: 1.55;
  max-width: 78ch;
}

.bloque figure {
  margin: 28px 0 8px;
}

.bloque figure img {
  width: 100%;
  border-radius: 4px;
}

.bloque figcaption {
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--apagado);
}

/* Ficha de magnitudes */
.ficha {
  background: var(--superficie);
  border: 1px solid var(--linea);
  border-radius: 4px;
  padding: 8px 18px;
}

.bloque--fondo .ficha {
  background: var(--fondo);
}

.ficha__fila {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--linea);
}

.ficha__fila:last-child {
  border-bottom: 0;
}

.ficha__clave {
  color: var(--apagado);
  font-size: 0.86rem;
  font-weight: 500;
}

.ficha__valor {
  color: var(--texto);
  font-weight: 500;
}

/* Línea de tiempo */
.linea-tiempo {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-left: 2px solid var(--linea);
}

.hito {
  position: relative;
  padding: 0 0 28px 22px;
}

.hito:last-child {
  padding-bottom: 0;
}

.hito::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--acento);
}

.hito__hora {
  margin: 0 0 6px;
  color: var(--acento);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: .04em;
}

.hito__cuerpo {
  margin: 0;
  max-width: 78ch;
}

/* Tarjetas */
.rejilla-tarjetas {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 28px;
}

.tarjeta {
  background: var(--superficie);
  border: 1px solid var(--linea);
  border-radius: 4px;
  padding: 22px 20px 20px;
}

.bloque--fondo .tarjeta {
  background: var(--fondo);
}

.tarjeta__titulo {
  font-family: "Libre Baskerville", serif;
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

.tarjeta__texto {
  margin: 0 0 14px;
  font-size: 0.95rem;
}

.tarjeta__texto:last-child {
  margin-bottom: 0;
}

/* Glosario */
.indice-letras {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 8px;
}

.indice-letras a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 8px;
  background: var(--superficie);
  border: 1px solid var(--linea);
  border-radius: 4px;
  color: var(--texto);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.88rem;
}

.indice-letras a:hover {
  background: var(--acento);
  color: var(--tinta);
  text-decoration: none;
}

.termino {
  padding: 22px 0;
  border-bottom: 1px solid var(--linea);
}

.termino:last-child {
  border-bottom: 0;
}

.termino__palabra {
  margin: 0 0 6px;
  font-family: "Libre Baskerville", serif;
  font-size: 1.2rem;
  font-weight: 700;
}

.termino__sigla {
  display: inline-block;
  margin-left: 8px;
  color: var(--acento);
  font-family: "Libre Franklin", sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: .06em;
}

.termino__def {
  margin: 0;
  max-width: 78ch;
}

/* Preguntas */
.pregunta {
  border-bottom: 1px solid var(--linea);
  padding: 4px 0;
}

.pregunta__q {
  width: 100%;
  display: block;
  background: none;
  border: 0;
  color: var(--texto);
  font-family: "Libre Franklin", sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: .01em;
  text-align: left;
  padding: 16px 0;
  cursor: pointer;
}

.pregunta__a {
  margin: 0 0 16px;
  max-width: 78ch;
  color: rgba(233, 239, 240, .92);
}

/* Listas */
.marca-lista {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.marca-lista li {
  position: relative;
  padding: 0 0 18px 22px;
  max-width: 78ch;
}

.marca-lista li:last-child {
  padding-bottom: 0;
}

.marca-lista li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--acento);
}

.marca-lista strong {
  display: block;
  margin-bottom: 4px;
  font-weight: 600;
}

/* Botones */
.boton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 18px;
  border-radius: 4px;
  font-family: "Libre Franklin", sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: .02em;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
}

.boton--solido {
  background: var(--acento);
  color: var(--tinta);
}

.boton--solido:hover {
  background: #2A9A8E;
  color: var(--tinta);
  text-decoration: none;
}

.boton--contorno {
  background: transparent;
  border-color: var(--acento);
  color: var(--acento);
}

.boton--contorno:hover {
  background: var(--acento);
  color: var(--tinta);
  text-decoration: none;
}

/* Pie */
.pie {
  margin-left: 236px;
  background: var(--superficie);
  border-top: 1px solid var(--linea);
  padding: 56px 0 36px;
}

.pie h2 {
  font-family: "Libre Baskerville", serif;
  font-size: clamp(1.35rem, 1.1rem + 0.8vw, 1.7rem);
  margin: 0 0 12px;
}

.pie-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pie-form__campo {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.pie-form__campo label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--texto);
}

.pie-form__campo input,
.pie-form__campo textarea,
.pie-form__campo select {
  width: 100%;
  background: var(--fondo);
  color: var(--texto);
  border: 1px solid var(--linea);
  border-radius: 4px;
  padding: 10px 12px;
  font-family: "Libre Franklin", sans-serif;
  font-size: 1rem;
  line-height: 1.4;
}

.pie-form__campo textarea {
  min-height: 120px;
  resize: vertical;
}

.pie-form__campo input:focus,
.pie-form__campo textarea:focus,
.pie-form__campo select:focus {
  outline: 2px solid var(--acento);
  outline-offset: 3px;
}

.pie-form__trampa {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.pie-form__aviso {
  margin: 0;
  font-size: 0.78rem;
  color: var(--apagado);
}

.pie-form__check {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.84rem;
  color: var(--apagado);
}

.pie-form__check input {
  margin-top: 5px;
  accent-color: var(--acento);
}

.pie-legal {
  margin-top: 42px;
  padding-top: 24px;
  border-top: 1px solid var(--linea);
  color: var(--apagado);
  font-size: 0.82rem;
}

.pie-legal p {
  margin: 0 0 10px;
  max-width: 78ch;
}

.pie-legal__enlaces {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.par-desigual iframe {
  width: 100%;
  height: 280px;
  border: 1px solid var(--linea);
  border-radius: 4px;
  background: var(--fondo);
}

/* Aviso de galletas */
.aviso-galletas {
  position: fixed;
  right: 20px;
  bottom: 20px;
  left: 256px;
  z-index: 60;
  background: var(--superficie);
  border: 1px solid var(--linea);
  border-radius: 4px;
  padding: 18px 20px;
  display: none;
  gap: 16px;
  align-items: flex-end;
  box-shadow: 0 8px 28px rgba(16, 25, 28, .35);
}

.aviso-galletas[data-visible="si"] {
  display: flex;
}

.aviso-galletas__texto {
  margin: 0;
  font-size: 0.86rem;
  color: var(--texto);
  flex: 1;
}

.aviso-galletas__botones {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* Mensajes de formulario */
.mensaje-ok,
.mensaje-error {
  padding: 14px 16px;
  border-radius: 4px;
  margin: 0 0 18px;
}

.mensaje-ok {
  background: var(--acento);
  color: var(--tinta);
}

.mensaje-error {
  background: #E0A458;
  color: var(--tinta);
}

.mensaje-error ul {
  margin: 8px 0 0;
  padding-left: 18px;
}

/* Animación de entrada */
html.js .asciende {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s ease, transform .5s ease;
}

html.js .asciende.a-vista {
  opacity: 1;
  transform: none;
}

.no-js .asciende {
  opacity: 1 !important;
  transform: none !important;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .asciende,
  html.js .asciende {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* Ancho estrecho: riel superior */
@media (max-width: 979px) {
  .riel-palanca {
    display: flex;
  }

  .riel {
    inset: 0 0 auto 0;
    width: 100%;
    height: auto;
    max-height: 64px;
    overflow: hidden;
    border-right: 0;
    border-bottom: 1px solid var(--linea);
    padding: 14px 72px 14px 20px;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 24px;
  }

  .riel[data-abierto="si"] {
    max-height: calc(100vh - 0px);
    overflow-y: auto;
    align-items: stretch;
    flex-direction: column;
    padding-bottom: 24px;
  }

  .riel-marca {
    flex: 1;
  }

  .riel-marca svg {
    display: none;
  }

  .riel-marca em,
  .riel-lista,
  .riel-contacto,
  .riel p {
    display: none;
  }

  .riel[data-abierto="si"] .riel-marca em,
  .riel[data-abierto="si"] .riel-lista,
  .riel[data-abierto="si"] .riel-contacto,
  .riel[data-abierto="si"] p {
    display: flex;
  }

  .riel[data-abierto="si"] .riel-lista {
    flex-direction: column;
    width: 100%;
  }

  .lectura {
    margin-left: 0;
    padding-top: 64px;
  }

  .pie {
    margin-left: 0;
  }

  .aviso-galletas {
    left: 16px;
    right: 16px;
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 899px) {
  .par-desigual,
  .rejilla-tarjetas {
    grid-template-columns: 1fr;
  }

  .ficha__fila {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}