/* ============================================================
   RUTA LIBRE — Hoja de estilos principal
   Blog de viajes en autocaravana por España
   Diseño premium estilo Apple/Notion · Light + Dark mode
   ============================================================ */

/* ============================================================
   1. VARIABLES DE COLOR Y DISEÑO (tema claro por defecto)
   ============================================================ */
:root {
  /* Paleta de marca */
  --color-primary: #2D6A4F;   /* verde bosque   */
  --color-secondary: #E9682A; /* naranja tierra */
  --color-accent: #5BA4CF;    /* azul cielo     */
  --color-earth: #8B5E3C;     /* marrón tierra  */
  --color-sand: #F4E4C1;      /* arena          */

  /* Derivados */
  --color-primary-dark: #1F4A37;
  --color-primary-light: #40916C;
  --color-secondary-dark: #C8531B;

  /* Superficies y texto (tema claro) */
  --bg: #FBFAF7;
  --bg-alt: #F3F0E9;
  --surface: #FFFFFF;
  --surface-2: #F7F5EF;
  --text: #1E2A24;
  --text-soft: #55605A;
  --text-muted: #8A938D;
  --border: #E7E2D6;
  --border-strong: #D6CFBE;

  /* Header / overlays */
  --header-bg: rgba(255, 255, 255, 0.72);
  --header-border: rgba(0, 0, 0, 0.06);

  /* Sombras */
  --shadow-sm: 0 1px 2px rgba(30, 42, 36, 0.06);
  --shadow-md: 0 6px 20px rgba(30, 42, 36, 0.08);
  --shadow-lg: 0 18px 48px rgba(30, 42, 36, 0.14);
  --shadow-glow: 0 10px 30px rgba(45, 106, 79, 0.28);

  /* Tipografía */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;

  /* Radios */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  /* Layout */
  --container: 1200px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --header-h: 74px;

  /* Transiciones */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ------------------ TEMA OSCURO ------------------ */
[data-theme="dark"] {
  --bg: #10161A;
  --bg-alt: #151D22;
  --surface: #1A2329;
  --surface-2: #202B31;
  --text: #ECF1EE;
  --text-soft: #B4BEB8;
  --text-muted: #7E8A83;
  --border: #2A363D;
  --border-strong: #384750;

  --color-primary-light: #52B788;
  --color-sand: #C9B78E;

  --header-bg: rgba(16, 22, 26, 0.72);
  --header-border: rgba(255, 255, 255, 0.08);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 10px 30px rgba(82, 183, 136, 0.28);
}

/* ============================================================
   2. RESET MODERNO
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 20px); -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}
img, picture, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button, input { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; font-weight: 700; }

/* ============================================================
   3. UTILIDADES
   ============================================================ */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.section--alt { background-color: var(--bg-alt); }

.section__header { max-width: 680px; margin: 0 auto clamp(2.2rem, 5vw, 3.5rem); text-align: center; }
.section__eyebrow {
  display: inline-block; font-family: var(--font-body); font-weight: 600; font-size: 0.8rem;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-secondary); margin-bottom: 0.8rem;
}
.section__title { font-size: clamp(1.9rem, 4.5vw, 3rem); color: var(--text); }
.section__subtitle { margin-top: 0.9rem; color: var(--text-soft); font-size: 1.05rem; }

/* ============================================================
   4. BOTONES
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.55rem;
  padding: 0.8rem 1.5rem; border-radius: var(--radius-pill); font-family: var(--font-body);
  font-weight: 600; font-size: 0.95rem; line-height: 1; white-space: nowrap;
  transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition), color var(--transition);
  will-change: transform;
}
.btn--lg { padding: 1rem 1.9rem; font-size: 1.02rem; }
.btn--primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-glow); }
.btn--primary:hover { background: var(--color-primary-dark); transform: translateY(-3px); }
.btn--secondary { background: var(--color-secondary); color: #fff; box-shadow: 0 10px 30px rgba(233,104,42,0.28); }
.btn--secondary:hover { background: var(--color-secondary-dark); transform: translateY(-3px); }
.btn--ghost { background: rgba(255,255,255,0.12); color: #fff; border: 1.5px solid rgba(255,255,255,0.55); backdrop-filter: blur(6px); }
.btn--ghost:hover { background: rgba(255,255,255,0.22); transform: translateY(-3px); }

/* ============================================================
   5. BARRA DE PROGRESO DE LECTURA
   ============================================================ */
.reading-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-secondary));
  z-index: 1200; transition: width 0.1s linear;
}

/* ============================================================
   6. HEADER FIJO
   ============================================================ */
.header {
  position: fixed; top: 0; left: 0; width: 100%; height: var(--header-h); z-index: 1000;
  background: var(--header-bg); backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid transparent; transition: box-shadow var(--transition), border-color var(--transition), height var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); border-bottom-color: var(--header-border); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 1rem; }

/* Logo */
.logo { display: flex; align-items: center; gap: 0.6rem; }
.logo__icon { font-size: 1.7rem; line-height: 1; }
.logo__text { display: flex; flex-direction: column; }
.logo__name { font-family: var(--font-display); font-weight: 800; font-size: 1.25rem; color: var(--text); line-height: 1.1; }
.logo__tagline { font-size: 0.68rem; color: var(--text-muted); letter-spacing: 0.02em; }

/* Navegación */
.nav__list { display: flex; align-items: center; gap: 0.35rem; }
.nav__link {
  position: relative; padding: 0.5rem 0.85rem; border-radius: var(--radius-sm);
  font-weight: 500; font-size: 0.95rem; color: var(--text-soft); transition: color var(--transition), background-color var(--transition);
}
.nav__link::after {
  content: ''; position: absolute; left: 0.85rem; right: 0.85rem; bottom: 0.3rem; height: 2px;
  background: var(--color-primary); transform: scaleX(0); transform-origin: left; transition: transform var(--transition);
}
.nav__link:hover, .nav__link.active { color: var(--text); }
.nav__link:hover::after, .nav__link.active::after { transform: scaleX(1); }

/* Controles del header */
.header__controls { display: flex; align-items: center; gap: 0.6rem; }
.theme-toggle {
  width: 42px; height: 42px; border-radius: var(--radius-pill); display: grid; place-items: center;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text); font-size: 1.05rem;
  position: relative; transition: background-color var(--transition), transform var(--transition);
}
.theme-toggle:hover { transform: rotate(-15deg) scale(1.05); }
.theme-toggle .fa-sun { display: none; }
[data-theme="dark"] .theme-toggle .fa-moon { display: none; }
[data-theme="dark"] .theme-toggle .fa-sun { display: block; }

/* Menú hamburguesa */
.hamburger { display: none; flex-direction: column; gap: 5px; width: 42px; height: 42px; padding: 10px; border-radius: var(--radius-sm); }
.hamburger span { display: block; height: 2.5px; width: 100%; background: var(--text); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
.hamburger.is-open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ============================================================
   7. HERO
   ============================================================ */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center;
  text-align: center; color: #fff; overflow: hidden; padding-top: var(--header-h);
}
.hero__bg {
  position: absolute; inset: 0; z-index: -2;
  background-image: url('https://images.unsplash.com/photo-1533104816931-20fa691ff6ca?w=1600&q=80');
  background-size: cover; background-position: center; transform: scale(1.1);
  will-change: transform;
}
.hero__overlay {
  position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(160deg, rgba(31,74,55,0.82) 0%, rgba(45,106,79,0.62) 40%, rgba(16,22,26,0.78) 100%);
}
.hero__content { position: relative; max-width: 860px; }
.hero__badge {
  display: inline-block; padding: 0.5rem 1.1rem; border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.16); border: 1px solid rgba(255,255,255,0.35);
  backdrop-filter: blur(6px); font-weight: 600; font-size: 0.9rem; margin-bottom: 1.5rem;
  animation: float 4s ease-in-out infinite;
}
.hero__title { font-size: clamp(2.4rem, 6.5vw, 4.6rem); font-weight: 900; letter-spacing: -0.02em; text-shadow: 0 4px 30px rgba(0,0,0,0.35); }
.hero__subtitle { margin: 1.3rem auto 0; max-width: 620px; font-size: clamp(1.05rem, 2.4vw, 1.35rem); color: rgba(255,255,255,0.92); font-weight: 300; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; margin-top: 2.3rem; }

/* Contadores del hero */
.hero__stats { display: flex; flex-wrap: wrap; justify-content: center; gap: clamp(1.5rem, 6vw, 4rem); margin-top: 3.2rem; }
.stat { display: flex; flex-direction: column; align-items: center; }
.stat__number, .stat__plus { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; }
.stat__plus { color: var(--color-secondary); }
.stat__label { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; color: rgba(255,255,255,0.8); margin-top: 0.2rem; }

.hero__scroll {
  position: absolute; bottom: 1.8rem; left: 50%; transform: translateX(-50%); font-size: 1.3rem;
  color: rgba(255,255,255,0.85); animation: bounce 2s infinite; z-index: 2;
}

/* ============================================================
   8. BUSCADOR
   ============================================================ */
.search-section { position: relative; margin-top: -3.5rem; z-index: 5; }
.search-box {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); padding: clamp(1.3rem, 3vw, 2rem); max-width: 860px; margin-inline: auto;
}
.search-input-wrap { position: relative; }
.search-icon { position: absolute; left: 1.2rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 1.1rem; }
.search-input {
  width: 100%; padding: 1rem 1.2rem 1rem 3.1rem; border-radius: var(--radius-pill);
  border: 1.5px solid var(--border-strong); background: var(--surface-2); font-size: 1.05rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 4px rgba(45,106,79,0.15); }

.filter-chips { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.1rem; }
.chip {
  padding: 0.5rem 1.1rem; border-radius: var(--radius-pill); font-weight: 500; font-size: 0.9rem;
  background: var(--surface-2); border: 1.5px solid var(--border); color: var(--text-soft);
  transition: all var(--transition);
}
.chip:hover { border-color: var(--color-primary); color: var(--color-primary); }
.chip.is-active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

.search-empty { margin-top: 1.2rem; text-align: center; color: var(--text-muted); font-size: 0.95rem; }
.search-empty i { color: var(--color-secondary); margin-right: 0.4rem; }

/* ============================================================
   9. CATEGORÍAS
   ============================================================ */
.categories-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.4rem;
}
.category-card {
  position: relative; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.8rem; overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.category-card::before {
  content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, var(--i-color, var(--color-primary)) 0%, transparent 60%);
  opacity: 0; transition: opacity var(--transition);
}
.category-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.category-card:hover::before { opacity: 0.08; }
.category-card__icon {
  display: grid; place-items: center; width: 60px; height: 60px; border-radius: var(--radius-md);
  font-size: 1.6rem; color: #fff; background: var(--i-color, var(--color-primary)); margin-bottom: 1.1rem;
  box-shadow: 0 8px 20px color-mix(in srgb, var(--i-color, var(--color-primary)) 40%, transparent);
}
.category-card__title { font-size: 1.25rem; color: var(--text); margin-bottom: 0.25rem; }
.category-card__count { color: var(--text-muted); font-size: 0.9rem; }
.category-card__arrow { position: absolute; top: 1.8rem; right: 1.8rem; color: var(--text-muted); transition: transform var(--transition), color var(--transition); }
.category-card:hover .category-card__arrow { transform: translateX(4px); color: var(--i-color, var(--color-primary)); }

/* ============================================================
   10. TARJETAS DE ARTÍCULOS
   ============================================================ */
.articles-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.8rem; }
.article-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
}
.article-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.article-card__media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--surface-2); }
.article-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-slow); }
.article-card:hover .article-card__media img { transform: scale(1.07); }
.article-card__cat {
  position: absolute; top: 0.9rem; left: 0.9rem; padding: 0.3rem 0.8rem; border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.92); color: var(--color-primary); font-weight: 600; font-size: 0.78rem;
  backdrop-filter: blur(4px);
}
.article-card__body { padding: 1.4rem; display: flex; flex-direction: column; flex: 1; }
.article-card__title { font-size: 1.22rem; color: var(--text); margin-bottom: 0.6rem; line-height: 1.25; }
.article-card__excerpt {
  color: var(--text-soft); font-size: 0.95rem; margin-bottom: 1rem;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.article-card__meta { display: flex; flex-wrap: wrap; gap: 0.9rem; color: var(--text-muted); font-size: 0.8rem; margin-top: auto; margin-bottom: 1rem; }
.article-card__meta i { margin-right: 0.3rem; }
.article-card__link { display: inline-flex; align-items: center; gap: 0.5rem; color: var(--color-primary); font-weight: 600; font-size: 0.92rem; transition: gap var(--transition); }
.article-card__link:hover { gap: 0.85rem; }

/* Estado oculto por el buscador */
.article-card.is-hidden { display: none; }

/* Loading skeleton para tarjetas */
.skeleton { position: relative; overflow: hidden; background: var(--surface-2); }
.skeleton::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--text) 8%, transparent), transparent);
  transform: translateX(-100%); animation: shimmer 1.5s infinite;
}

/* ============================================================
   11. RUTAS DESTACADAS
   ============================================================ */
.routes-list { display: flex; flex-direction: column; gap: 2.2rem; }
.route-card {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 0; overflow: hidden;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); transition: transform var(--transition), box-shadow var(--transition);
}
.route-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.route-card--reverse .route-card__media { order: 2; }
.route-card__media { position: relative; min-height: 320px; overflow: hidden; background: var(--surface-2); }
.route-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition-slow); }
.route-card:hover .route-card__media img { transform: scale(1.06); }
.route-card__badge {
  position: absolute; top: 1rem; left: 1rem; padding: 0.35rem 0.9rem; border-radius: var(--radius-pill);
  font-weight: 600; font-size: 0.8rem; color: #fff; backdrop-filter: blur(4px);
}
.route-card__badge--easy { background: rgba(45,106,79,0.9); }
.route-card__badge--medium { background: rgba(233,104,42,0.9); }
.route-card__badge--hard { background: rgba(200,60,40,0.9); }
.route-card__body { padding: clamp(1.5rem, 3vw, 2.4rem); display: flex; flex-direction: column; justify-content: center; }
.route-card__title { font-size: clamp(1.4rem, 2.6vw, 1.9rem); color: var(--text); margin-bottom: 0.8rem; }
.route-card__desc { color: var(--text-soft); margin-bottom: 1.3rem; }
.route-card__stats { display: flex; flex-wrap: wrap; gap: 1.4rem; margin-bottom: 1.6rem; }
.route-card__stats li { display: flex; align-items: center; gap: 0.5rem; font-weight: 500; font-size: 0.92rem; color: var(--text-soft); }
.route-card__stats i { color: var(--color-primary); }
.route-card .btn { align-self: flex-start; }

/* ============================================================
   12. BANNER ADSENSE
   ============================================================ */
.adsense-banner {
  margin-block: clamp(2rem, 5vw, 3.5rem); min-height: 90px; display: grid; place-items: center;
  border: 1.5px dashed var(--border-strong); border-radius: var(--radius-md);
  background: repeating-linear-gradient(45deg, var(--surface-2), var(--surface-2) 10px, transparent 10px, transparent 20px);
}
.adsense-banner__label { font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); }

/* ============================================================
   13. NEWSLETTER
   ============================================================ */
.newsletter { padding-block: clamp(3.5rem, 8vw, 6rem); background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 55%, var(--color-earth) 130%); color: #fff; }
.newsletter__inner { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.newsletter__title { font-size: clamp(1.8rem, 4vw, 2.7rem); }
.newsletter__subtitle { margin-top: 0.8rem; color: rgba(255,255,255,0.9); font-size: 1.05rem; }
.newsletter__bullets { margin-top: 1.4rem; display: flex; flex-direction: column; gap: 0.6rem; }
.newsletter__bullets li { display: flex; align-items: center; gap: 0.7rem; font-weight: 500; }
.newsletter__bullets i { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; background: var(--color-secondary); font-size: 0.75rem; }
.newsletter__form { background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); border-radius: var(--radius-lg); padding: clamp(1.5rem, 3vw, 2.2rem); backdrop-filter: blur(8px); }
.newsletter__field { position: relative; margin-bottom: 1rem; }
.newsletter__field i { position: absolute; left: 1.1rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); }
.newsletter__field input {
  width: 100%; padding: 1rem 1.1rem 1rem 3rem; border-radius: var(--radius-pill); border: none;
  background: #fff; color: #1E2A24; font-size: 1rem;
}
.newsletter__field input:focus { outline: 3px solid var(--color-accent); }
.newsletter__form .btn { width: 100%; }
.newsletter__message { margin-top: 0.9rem; font-weight: 600; font-size: 0.9rem; min-height: 1.2rem; }
.newsletter__message.is-error { color: #FFD5C2; }
.newsletter__message.is-success { color: #C9F5DE; }
.newsletter__legal { margin-top: 0.6rem; font-size: 0.78rem; color: rgba(255,255,255,0.7); }

/* ============================================================
   14. COMUNIDAD
   ============================================================ */
.hashtag { color: var(--color-secondary); font-style: italic; }
.community-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.2rem; }
.community-tile {
  position: relative; aspect-ratio: 1 / 1; border-radius: var(--radius-lg); overflow: hidden;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.8rem;
  color: #fff; font-weight: 600; background: linear-gradient(150deg, var(--tile, var(--color-primary)), color-mix(in srgb, var(--tile, var(--color-primary)) 55%, #000));
  transition: transform var(--transition), box-shadow var(--transition);
}
.community-tile i { font-size: 2.4rem; }
.community-tile span { font-size: 0.9rem; opacity: 0.95; }
.community-tile:hover { transform: scale(1.04); box-shadow: var(--shadow-lg); }
.community__cta { text-align: center; margin-top: 2.5rem; }

/* ============================================================
   15. FOOTER
   ============================================================ */
.footer { background: var(--bg-alt); border-top: 1px solid var(--border); padding-top: clamp(3rem, 6vw, 4.5rem); }
.footer__grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 2rem; padding-bottom: 2.5rem; }
.footer__brand .logo--footer { margin-bottom: 1rem; }
.logo--footer .logo__name { font-size: 1.35rem; }
.footer__desc { color: var(--text-soft); font-size: 0.92rem; max-width: 320px; margin-bottom: 1.2rem; }
.footer__social { display: flex; gap: 0.6rem; }
.footer__social a {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%;
  background: var(--surface); border: 1px solid var(--border); color: var(--text-soft);
  transition: transform var(--transition), background-color var(--transition), color var(--transition);
}
.footer__social a:hover { background: var(--color-primary); color: #fff; transform: translateY(-3px); }
.footer__title { font-family: var(--font-body); font-weight: 700; font-size: 0.95rem; color: var(--text); margin-bottom: 1rem; }
.footer__col ul { display: flex; flex-direction: column; gap: 0.6rem; }
.footer__col a { color: var(--text-soft); font-size: 0.9rem; transition: color var(--transition), padding-left var(--transition); }
.footer__col a:hover { color: var(--color-primary); padding-left: 4px; }
.footer__bottom { border-top: 1px solid var(--border); padding-block: 1.4rem; }
.footer__bottom p { text-align: center; color: var(--text-muted); font-size: 0.85rem; }
.footer__bottom i { color: var(--color-secondary); }

/* ============================================================
   16. BOTÓN VOLVER ARRIBA
   ============================================================ */
.back-to-top {
  position: fixed; bottom: 1.8rem; right: 1.8rem; width: 52px; height: 52px; border-radius: 50%;
  background: var(--color-primary); color: #fff; font-size: 1.1rem; display: grid; place-items: center;
  box-shadow: var(--shadow-glow); z-index: 900; opacity: 0; visibility: hidden; transform: translateY(20px) scale(0.8);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition), background-color var(--transition);
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.back-to-top:hover { background: var(--color-primary-dark); transform: translateY(-4px) scale(1.05); }

/* ============================================================
   17. ANIMACIONES (@keyframes) Y CLASES SCROLL
   ============================================================ */
.fade-in-up, .fade-in-left, .fade-in-right { opacity: 0; transition: opacity var(--transition-slow), transform var(--transition-slow); will-change: opacity, transform; }
.fade-in-up { transform: translateY(40px); }
.fade-in-left { transform: translateX(-50px); }
.fade-in-right { transform: translateX(50px); }
.fade-in-up.visible, .fade-in-left.visible, .fade-in-right.visible { opacity: 1; transform: none; }

@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes bounce { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }
@keyframes shimmer { 100% { transform: translateX(100%); } }
@keyframes fadeInScale { from { opacity: 0; transform: scale(0.96); } to { opacity: 1; transform: scale(1); } }

/* Respeta a quien prefiere menos movimiento */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  .fade-in-up, .fade-in-left, .fade-in-right { opacity: 1; transform: none; }
}

/* ============================================================
   18. MEDIA QUERIES (1200 / 992 / 768 / 480)
   ============================================================ */
@media (max-width: 1200px) {
  .footer__grid { grid-template-columns: 1.4fr repeat(2, 1fr); }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 992px) {
  .nav__list { gap: 0; }
  .nav__link { padding: 0.5rem 0.6rem; font-size: 0.9rem; }
  .route-card, .route-card--reverse { grid-template-columns: 1fr; }
  .route-card--reverse .route-card__media { order: 0; }
  .newsletter__inner { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --header-h: 66px; }
  /* Menú móvil desplegable */
  .hamburger { display: flex; }
  .nav {
    position: fixed; top: var(--header-h); right: 0; width: min(80%, 320px); height: calc(100vh - var(--header-h));
    background: var(--surface); border-left: 1px solid var(--border); box-shadow: var(--shadow-lg);
    transform: translateX(100%); transition: transform var(--transition); padding: 1.5rem; overflow-y: auto;
  }
  .nav.is-open { transform: translateX(0); }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0.2rem; }
  .nav__link { display: block; padding: 0.9rem 1rem; border-radius: var(--radius-sm); font-size: 1.05rem; }
  .nav__link::after { display: none; }
  .nav__link:hover { background: var(--surface-2); }

  .hero { min-height: 92vh; }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .hero__cta .btn { width: 100%; }
  .articles-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  :root { --gutter: 1.1rem; }
  .section__title { font-size: 1.7rem; }
  .search-section { margin-top: -2.5rem; }
  .hero__stats { gap: 1.5rem; }
  .footer__grid { grid-template-columns: 1fr; }
  .back-to-top { width: 46px; height: 46px; bottom: 1.1rem; right: 1.1rem; }
  .logo__tagline { display: none; }
}