:root {
  /* Sistema de tipografía escalable (base 16px = 1rem) */
  --font-size-base: 1rem; /* 16px */
  --font-size-xs: 0.75rem; /* 12px */
  --font-size-sm: 0.875rem; /* 14px */
  --font-size-md: 1rem; /* 16px */
  --font-size-lg: 1.125rem; /* 18px */
  --font-size-xl: 1.25rem; /* 20px */
  --font-size-2xl: 1.5rem; /* 24px */
  --font-size-3xl: 2rem; /* 32px */
  --font-size-4xl: 2.5rem; /* 40px */
  --font-size-5xl: 3rem; /* 48px */
  --font-size-6xl: 4rem; /* 64px */
  --font-size-7xl: 5rem; /* 80px */
  --font-size-hero: clamp(3rem, 8vw, 7rem); /* Responsive hero */

  /* Line-height para legibilidad */
  --line-height-tight: 0.8;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --line-height-loose: 2;

  /* Sistema de espaciado (escala 8px base) */
  --spacing-xs: 0.25rem; /* 4px */
  --spacing-sm: 0.5rem; /* 8px */
  --spacing-md: 1rem; /* 16px */
  --spacing-lg: 1.5rem; /* 24px */
  --spacing-xl: 2rem; /* 32px */
  --spacing-2xl: 3rem; /* 48px */
  --spacing-3xl: 4rem; /* 64px */

  /* Colores con mejor contraste WCAG */
  --bg-color: #000;
  --text-color: #fff;
  --text-color-dark: #29385A;
  --text-color-muted: #47484A;
  --accent-color: #2B4071;
  --accent-color-hover: #3d5a9e;
  --button-bg: #1a3d2f;
  --button-bg-hover: #3d5a9e;
  --button-disabled: #6b6b6b;
  --star-glow: rgba(255, 255, 255, 0.15);
  
  /* Overlay para mejor legibilidad */
  --overlay-light: rgba(0, 0, 0, 0.5);
  --overlay-medium: rgba(0, 0, 0, 0.7);
  --overlay-dark: rgba(0, 0, 0, 0.8);

  /* Fuentes */
  --font-sans: "Albert Sans", sans-serif;
  --font-serif: "Bacasime Antique", serif;

  /* Breakpoints */
  --breakpoint-sm: 600px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;

  /* Tamaños mínimos táctiles (WCAG) */
  --touch-target-min: 2.75rem; /* 44px */
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%; /* 16px por defecto, respeta preferencias del usuario */
  height: 100%;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  height: 100%;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  scroll-behavior: smooth;
}

/* ---------- ESTILOS LANDING -------------------------------------- */
body {
  min-height: 100vh;
  font-family: var(--font-sans);
  overflow-x: hidden;
  color: var(--text-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

.body-endesa {
  position: relative;
  width: 100%;
  overflow: hidden;
  margin-top: clamp(-6.25rem, -15vw, -11.25rem);
  opacity: 0;
  transition: opacity 0.6s ease-in;
}

.body-endesa.loaded {
  opacity: 1;
}

.hub-background {
  width: 100%;
  height: auto;
  display: block;
  opacity: 0;
  transition: opacity 0.8s ease-in;
}

.hub-background.loaded {
  opacity: 1;
}

.hub-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}


.intro-container {
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md) 0;
  max-width: 31.25rem; /* 500px */
  margin: 0 auto;
  color: var(--text-color-dark);
  z-index: 2;
  position: relative;
  opacity: 0;
  visibility: hidden;
}

.intro-container.loaded {
  opacity: 1;
  visibility: visible;
}

.collab-endesa {
  color: #29385a;
  text-align: center;
  font-size: var(--font-size-xs);
  font-style: normal;
  font-weight: 400;
  line-height: var(--line-height-normal);
  letter-spacing: 0.0825rem; /* 1.32px */
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 0.8s ease-out 0.2s, transform 0.8s ease-out 0.2s;
}

.intro-container.loaded .collab-endesa {
  opacity: 1;
  transform: translateY(0);
}

.intro-container h1 {
  font-size: var(--font-size-hero);
  margin-bottom: var(--spacing-md);
  font-family: var(--font-serif);
  color: #29385a;
  text-align: center;
  font-style: normal;
  font-weight: 400;
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
  opacity: 0;
  transform: translateY(1.5rem) scale(0.98);
  transition: opacity 1s ease-out 0.4s, transform 1s ease-out 0.4s;
}

.intro-container.loaded h1 {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.intro-container h2 {
  font-size: var(--font-size-2xl);
  font-weight: 300;
  margin-bottom: var(--spacing-xl);
  color: #29385a;
  text-align: center;
  font-style: normal;
  line-height: var(--line-height-normal);
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 0.8s ease-out 0.6s, transform 0.8s ease-out 0.6s;
}

.intro-container.loaded h2 {
  opacity: 1;
  transform: translateY(0);
}

.intro-container a {
  border: 1px solid var(--accent-color);
  color: var(--accent-color-hover);
  text-decoration: none;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius:var(--spacing-xs); 
  font-size: var(--font-size-base);
  font-style: normal;
  font-weight: 600;
  line-height: var(--line-height-normal);
  display: inline-block;
  min-height: var(--touch-target-min);
  min-width: var(--touch-target-min);
  transition: background-color 0.2s ease, transform 0.1s ease, opacity 0.8s ease-out 0.8s, transform 0.8s ease-out 0.8s;
  opacity: 0;
  transform: translateY(1rem) scale(0.95);
}

.intro-container.loaded a {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.intro-container a:hover {
  color: #fff;
  background-color: var(--accent-color);
}

.intro-container a:focus {
  outline: 0.125rem solid var(--accent-color);
  outline-offset: 0.25rem;
}

.hub-section {
  position: absolute;
  width: 24rem; /* 300px */
  max-width: 90%;
  padding: var(--spacing-md);
  background: #3d5a9e9e;
  border-radius: var(--spacing-sm);
  backdrop-filter: blur(0.5rem);
  will-change: transform, opacity;
  transition: transform 0.1s ease-out, opacity 0.3s ease-out;
  transform-style: preserve-3d;
}

/* Pantallas grandes (> 1600px) */
#cap1 { top: 10%; left: 10%; }
#cap2 { top: 20%; right: 28%; }
#cap3 { top: 36%; left: 24%; }
#cap4 { top: 50%; left: 27%; }
#cap5 { top: 64%; right: 25%; }
#cap6 { bottom: 5%; right: 18%; }

.hub-title {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  font-weight: 400;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  color: var(--text-color);
  text-shadow: 0 0 0.2px rgb(0 0 0 / 56%);
}

.hub-button {
  background-color: var(--accent-color);
  color: #fff;
  padding: var(--spacing-md) var(--spacing-lg);
  border: 0.125rem solid transparent;
  border-radius: var(--spacing-xs);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--font-size-base);
  display: inline-block;
  min-height: var(--touch-target-min);
  width: 100%;
  min-width: var(--touch-target-min);
  line-height: var(--line-height-normal);
  text-align: center;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.2);
}

.hub-button:hover {
  background-color: var(--button-bg-hover);
  transform: translateY(-0.0625rem);
  box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.3);
}

.hub-button:active {
  transform: translateY(0);
  box-shadow: 0 0.0625rem 0.125rem rgba(0, 0, 0, 0.2);
}

.hub-button:focus {
  outline: none;
}

.hub-button:focus-visible {
  outline: 0.1875rem solid var(--text-color);
  outline-offset: 0.1875rem;
  box-shadow: 0 0 0 0.25rem rgba(255, 255, 255, 0.3);
}

.hub-button:disabled,
.hub-button.disabled,
.hub-button[aria-disabled="true"] {
  background-color: var(--button-disabled);
  color: rgba(255, 255, 255, 0.7);
  pointer-events: none;
  cursor: not-allowed;
  opacity: 0.7;
  transform: none;
  box-shadow: none;
}

/* Media queries responsive */

/* Laptop (1025px - 1600px) — ajustado para ~1520px */
@media (max-width: 1600px) and (min-width: 1025px) {
  #cap1 { top: 10%; left: 5%; }
  #cap2 { top: 22%; right: 31%; }
  #cap3 { top: 35%; left: 20%; }
  #cap4 { top: 50%; left: 22%; }
  #cap5 { top: 63%; right: 18%; }
  #cap6 { bottom: 4%; right: 11%; }
}

/* Tablet (601px - 1024px) */
@media (max-width: 1024px) and (min-width: 601px) {
  .hub-title {
    font-size: 1.1rem;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
  }
  .hub-section {
    width: 15rem; /* 280px */
    padding: var(--spacing-sm);
  }

  #cap1 { top: 12%; left: 3%; }
  #cap2 { top: 18%; right: 27%; }
  #cap3 { top: 33%; left: 8%; }
  #cap4 { top: 45%; right: 15%; }
  #cap5 { top: 60%; right: 10%; }
  #cap6 { bottom: 5%;; right: 8%; }
}

@media (max-width: 600px) {
  html {
    font-size: 16px; /* Mantener tamaño base legible */
  }

  .intro-container {
    padding: var(--spacing-md) var(--spacing-sm) 0;
    max-width: 100%;
  }
  
  .intro-container h1 {
    font-size: clamp(2.5rem, 10vw, 3rem);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-md);
  }
  
  .intro-container h2 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
  }
  
  .intro-container a {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
    width: 100%;
    max-width: 20rem;
  }

  .body-endesa {
    margin-top: clamp(1rem, -12vw, -11.25rem);
    overflow: visible;
  }

  /* Ocultar imagen principal en móvil ya que será fondo del contenedor */
  .hub-background {
    display: none;
  }

  /* Scroll snap para ver un capítulo por pantalla */
  body {
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
    overflow-y: scroll;
  }

  .hub-container {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 0;
    gap: 0;
    background: transparent;
    min-height: auto;
  }

  .hub-container > * {
    position: relative;
    z-index: 1;
  }

  .hub-section {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 100vh;
    max-width: 100%;
    top: auto !important;
    left: auto !important;
    right: auto !important;
    margin: 0;
    padding: 0 0 16px 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: center;
    overflow: hidden;
    border-radius: 0;
    background: transparent;
    scroll-snap-align: start;
    scroll-snap-stop: always;
  }

  /* Imagen de fondo sin blur para cada capítulo */
  .hub-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
  }

  /* Imágenes específicas para cada capítulo */
  #cap1::after {
    background-image: url('../img/endesa-primer-parque-eolico-cap2.jpg');
    background-position: center;
  }

  #cap2::after {
    background-image: url('../img/endesa-planta-solar-extremadura.jpg');
    background-position: center;
  }

  #cap3::after {
    background-image: url('../img/endesa-avistamiento-aves-parque-eolico-cap5.jpg');
    background-position: right;
  }

  #cap4::after {
    background-image: url('../img/endesa-noguera-pallaresa-cap4.jpg');
    background-position: center;
  }

  #cap5::after {
    background-image: url('../img/endesa-oso-pardo-cap1.jpg');
    background-position: center;
  }

  #cap6::after {
    background-image: url('../img/endesabats-cap3.jpg');
    background-position: center;
  }

  /* Contenedor del contenido dentro de la caja */
  .hub-section > * {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 85%;
    margin: 0 auto var(--spacing-xl) auto;
    padding: var(--spacing-lg);
    background: #3d5a9e78;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--spacing-sm);
  }

  .hub-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
  }

  /* Los botones mantienen el mismo estilo en mobile */
  .hub-button {
    width: 100%;
    margin: 0 auto;
    background-color: var(--accent-color);
  }
}

/* Preferencias de movimiento reducido */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .hub-section {
    opacity: 1 !important;
    transform: none !important;
    will-change: auto !important;
  }
  
  .intro-container,
  .intro-container.loaded,
  .intro-container.loaded .collab-endesa,
  .intro-container.loaded h1,
  .intro-container.loaded h2,
  .intro-container.loaded a {
    opacity: 1 !important;
    transform: none !important;
    visibility: visible !important;
  }
}

/* Alto contraste para mejor accesibilidad */
@media (prefers-contrast: high) {
  .hub-section {
    background: var(--overlay-dark);
    border: 0.125rem solid var(--text-color);
  }
  
  .hub-button {
    border: 0.1875rem solid var(--text-color);
    background-color: var(--button-bg);
  }
  
  .hub-button:hover {
    background-color: var(--button-bg-hover);
    border-color: var(--text-color);
  }
  
  .hub-button:focus-visible {
    outline: 0.25rem solid var(--text-color);
    outline-offset: 0.125rem;
  }
}

/* ---------- CRÉDITOS ---------------------------------- */
.authorship-f {
  color: var(--button-bg-hover);
  font-size: var(--font-size-sm);
  text-align: center;
  padding: var(--spacing-md);
  position: relative;
  bottom: 0;
  width: 100%;
  line-height: var(--line-height-relaxed);
}

/* estilos para que en LV se muestre el contenido sin margenes */
.wallpaper-inverted-ad{
  display: none!important;
}

.visual-article-free .col-12 {
  padding-right: 0 !important;
  padding-left: 0 !important;
  margin-top: 0 !important;
}
.content-free-html {
  margin:0 !important;
}
.container-fluid {
  padding-right: 0 !important;
  padding-left: 0 !important;
}
.visual__story--free .content-free-html {
  margin: 0px !important;
}
.row>* {
  padding-right: 0!important;
  padding-left: 0!important;
  margin-top: 0!important;
}
.article-default a:hover {
  text-decoration: none;
  box-shadow: none;
}
button:focus {
    outline: 1px dotted var(--background-color);
    outline: 5px auto var(--background-color) -webkit-focus-ring-color;
}
.links-endesa {
color: var(--accent-color);
}