:root {
  --azul: #2f5be0;
  --azul-osc: #1e3a8a;
  --azul-claro: #eff4ff;
  --verde: #0f8a48;
  --verde-claro: #eaf7ef;
  --texto: #1f2937;
  --suave: #4b5563;
  --borde: #dbe3f0;
  --fondo: #ffffff;
  --fondo-alt: #f7f9fc;
  --radio: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--texto);
  background: var(--fondo);
}

a { color: var(--azul); }
a:focus-visible, .btn:focus-visible { outline: 3px solid #f59e0b; outline-offset: 2px; }

.contenedor { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

.saltar {
  position: absolute; left: -999px; top: 0;
  background: var(--azul-osc); color: #fff; padding: 8px 14px; z-index: 10;
}
.saltar:focus { left: 8px; }

/* Cabecera */
header {
  position: sticky; top: 0; z-index: 5;
  background: rgba(255, 255, 255, .95);
  border-bottom: 1px solid var(--borde);
}
.barra { padding-top: 8px; padding-bottom: 8px; display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 68px; flex-wrap: wrap; }
.logo { display: block; line-height: 0; }
.logo img { height: 56px; width: auto; }
img, video { max-width: 100%; height: auto; }
figure { margin: 0; }
nav ul { display: flex; gap: 22px; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
nav a { text-decoration: none; color: var(--texto); font-weight: 500; }
nav a:hover { color: var(--azul); }

/* Portada */
.portada { background: linear-gradient(160deg, var(--azul-claro), #fff 70%); padding: 80px 0 72px; }
.portada h1 { font-size: clamp(2rem, 5vw, 3.1rem); line-height: 1.15; margin: 0 0 18px; color: var(--azul-osc); max-width: 18ch; }
.portada p { font-size: 1.15rem; color: var(--suave); max-width: 56ch; margin: 0 0 30px; }
.acciones { display: flex; gap: 12px; flex-wrap: wrap; }

.portada-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: center; }
.sello { max-width: 380px; width: 100%; justify-self: center; background: #fff; border: 1px solid var(--borde); border-radius: var(--radio); padding: 14px; text-align: center; }
.sello figcaption { margin-top: 8px; font-size: .9rem; font-weight: 600; color: var(--verde); }

.video-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 48px; align-items: center; }
.video-marco { max-width: 320px; margin: 0 auto; border-radius: 22px; overflow: hidden; background: #111; line-height: 0; box-shadow: 0 12px 30px rgba(30, 58, 138, .18); }
.video-marco video, .video-marco img { width: 100%; display: block; }
.lista { margin: 0; padding-left: 20px; }
.lista li { margin-bottom: 10px; }
.foto img { border-radius: var(--radio); display: block; }
.etiqueta { display: inline-block; margin: 0 0 8px; padding: 4px 12px; border-radius: 999px; background: var(--verde-claro); color: var(--verde); font-weight: 600; font-size: .9rem; }
.subtitulo { margin: 52px 0 20px; font-size: 1.35rem; color: var(--azul-osc); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 22px; border-radius: 999px;
  font-weight: 600; text-decoration: none;
  border: 2px solid var(--azul);
}
.btn-primario { background: var(--azul); color: #fff; }
.btn-primario:hover { background: var(--azul-osc); border-color: var(--azul-osc); }
.btn-secundario { background: #fff; color: var(--azul); }
.btn-secundario:hover { background: var(--azul-claro); }

/* Secciones */
section { padding: 72px 0; }
.alt { background: var(--fondo-alt); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.1rem); margin: 0 0 10px; color: var(--azul-osc); }
.intro { color: var(--suave); margin: 0 0 36px; max-width: 60ch; }

.tarjetas { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.tarjeta { background: #fff; border: 1px solid var(--borde); border-radius: var(--radio); padding: 26px; }
.tarjeta h3 { margin: 12px 0 8px; font-size: 1.15rem; }
.tarjeta p { margin: 0; color: var(--suave); }
.icono {
  width: 46px; height: 46px; border-radius: 12px;
  display: grid; place-items: center;
  background: var(--azul-claro); color: var(--azul);
}
.icono svg { width: 24px; height: 24px; }

.pasos { counter-reset: paso; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; list-style: none; padding: 0; margin: 0; }
.pasos li { counter-increment: paso; padding-left: 0; }
.pasos li::before {
  content: counter(paso);
  display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--azul); color: #fff; font-weight: 700; margin-bottom: 10px;
}
.pasos strong { display: block; margin-bottom: 4px; }
.pasos span { color: var(--suave); }

/* Contacto */
.contacto-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.canal { display: flex; flex-direction: column; gap: 4px; background: #fff; border: 1px solid var(--borde); border-radius: var(--radio); padding: 20px; }
.canal a { font-weight: 600; word-break: break-word; }

.aviso {
  margin-top: 28px; padding: 18px 20px;
  border-left: 4px solid var(--azul);
  background: var(--azul-claro); border-radius: 0 var(--radio) var(--radio) 0;
  font-size: .95rem; color: var(--texto);
}
.aviso strong { color: var(--azul-osc); }

/* Portada futurista: vidrio y red de conexiones */
.hero {
  position: relative; overflow: hidden; color: #eaf2ff;
  /* Foto propia del altiplano de Atacama con velo azul corporativo para que el texto se lea */
  background:
    linear-gradient(90deg, rgba(6, 14, 40, .82) 0%, rgba(8, 22, 64, .5) 36%, rgba(8, 22, 64, 0) 56%),
    linear-gradient(180deg, rgba(6, 14, 40, .3), transparent 25%, transparent 80%, rgba(6, 14, 40, .45)),
    url("img/atacama-portada.webp") 60% 32% / cover no-repeat,
    #0b1a45;
}
.hero-red { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .7; mix-blend-mode: screen; }
.hilos path { stroke-dasharray: 6 10; animation: fluir 9s linear infinite; }
.hilos path:nth-child(odd) { animation-duration: 13s; }
.nodos circle { animation: latir 3.2s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
.nodos circle:nth-child(3n) { animation-delay: 1.1s; }
.nodos circle:nth-child(3n+1) { animation-delay: 2.1s; }
@keyframes fluir { to { stroke-dashoffset: -320; } }
@keyframes latir { 50% { opacity: .35; transform: scale(.7); } }

.hero-escena { position: relative; z-index: 1; min-height: 640px; display: grid; align-items: center; justify-items: start; padding-top: 56px; padding-bottom: 56px; }

.vidrio {
  background: linear-gradient(145deg, rgba(255, 255, 255, .14), rgba(255, 255, 255, .04));
  border: 1px solid rgba(190, 220, 255, .28);
  box-shadow: 0 20px 50px rgba(0, 0, 0, .35), inset 0 1px 0 rgba(255, 255, 255, .25);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-radius: 18px;
}

.hero-titulo { position: relative; z-index: 2; max-width: 520px; padding: 38px 40px; text-align: left; }
.hero-titulo h1 {
  margin: 0; font-size: clamp(2rem, 4.6vw, 3.4rem); line-height: 1.08; letter-spacing: .01em; text-transform: uppercase;
  font-family: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  font-weight: 800;
  background: linear-gradient(180deg, #ffffff 35%, #d7e4ff 65%, #ffc98f);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 40px rgba(142, 232, 255, .25);
}
.hero-sub { margin: 14px 0 0; font-size: .95rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: #bfe9ff; }
.hero-texto { margin: 18px 0 26px; max-width: 48ch; color: #eef3ff; font-size: 1.15rem; font-weight: 500; }
.btn-brillo {
  background: linear-gradient(90deg, #7c5cff, #3b82f6 55%, #20c997); color: #fff; border: 0;
  box-shadow: 0 0 24px rgba(124, 92, 255, .45);
}
.btn-brillo:hover { box-shadow: 0 0 34px rgba(142, 232, 255, .6); }
.btn-vidrio { background: rgba(255, 255, 255, .08); color: #eaf2ff; border: 1px solid rgba(190, 220, 255, .4); }
.btn-vidrio:hover { background: rgba(255, 255, 255, .16); }

.panel { position: absolute; padding: 14px; font-size: .85rem; color: #dbe7ff; animation: flotar 7s ease-in-out infinite; }
.panel strong { display: block; color: #fff; margin-bottom: 10px; }
.panel-barra { display: flex; gap: 5px; margin-bottom: 10px; }
.panel-barra i { width: 8px; height: 8px; border-radius: 50%; background: #ff6b8b; }
.panel-barra i:nth-child(2) { background: #ffd166; }
.panel-barra i:nth-child(3) { background: #4ade80; }
.raya { display: block; height: 6px; border-radius: 3px; background: rgba(190, 220, 255, .35); margin-top: 8px; }
.raya.corta { width: 60%; }
.chip { display: inline-block; margin-top: 12px; padding: 4px 12px; border-radius: 999px; font-size: .75rem; background: linear-gradient(90deg, #7c5cff, #20c997); color: #fff; }

.panel-sectores { right: 0; top: 48px; animation-delay: -1s; }
.mini-fotos { display: flex; gap: 10px; }
.mini-fotos figure { margin: 0; text-align: center; font-size: .72rem; color: #cfe0ff; }
.mini-fotos img { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; border: 2px solid rgba(142, 232, 255, .7); display: block; margin-bottom: 4px; }
.panel-sello { right: 0; bottom: 56px; display: flex; align-items: center; gap: 10px; animation-delay: -5s; }
.panel-sello img { width: 74px; height: auto; filter: drop-shadow(0 4px 10px rgba(0, 0, 0, .35)); }
.panel-sello small { color: #b9f0cf; font-size: .72rem; }
@keyframes flotar { 50% { transform: translateY(-12px); } }

/* Buenas prácticas */
.pagina-practicas h1, .pagina-practicas h2 {
  font-family: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  font-weight: 700; letter-spacing: -.015em;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
.logos-derecha { display: flex; align-items: center; gap: 12px; margin-left: auto; }
.logos-derecha img { height: 45px; width: auto; display: block; }
.logos-derecha .logo-lso { height: 48px; }
.logos-derecha .separador { width: 1px; height: 28px; background: var(--borde); }

.practicas-portada { padding: 72px 0 56px; }
.practicas-portada h1 { max-width: 22ch; }
.practicas-portada .linea { width: 64px; height: 4px; border-radius: 2px; background: linear-gradient(90deg, var(--azul), var(--verde)); margin: 0 0 22px; }
.practicas-portada p:not(.etiqueta) { max-width: 64ch; }

.practicas { padding-top: 24px; }
.practicas-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.practica {
  display: grid; grid-template-columns: 1fr; gap: 16px; justify-items: center; align-content: start; text-align: center;
  background: #fff; border: 1px solid var(--borde); border-radius: 18px; padding: 28px 24px;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.practica:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(30, 58, 138, .12); border-color: #c7d4f2; }
.circulo {
  width: 132px; height: 132px; border-radius: 50%; padding: 4px;
  background: conic-gradient(from 0deg, var(--azul), var(--verde), var(--azul));
  overflow: hidden; flex-shrink: 0;
}
.circulo img {
  width: 100%; height: 100%; object-fit: cover; border-radius: 50%;
  border: 3px solid #fff; display: block;
}
/* Al pasar el cursor el anillo gira y la foto se mantiene quieta */
.practica:hover .circulo { animation: girar 6s linear infinite; }
.practica:hover .circulo img { animation: girar 6s linear infinite reverse; }
@keyframes girar { to { transform: rotate(360deg); } }
.practica h2 { font-size: 1.22rem; margin: 0 0 8px; color: var(--azul-osc); line-height: 1.3; }
.practica p { margin: 0; color: var(--suave); font-size: .97rem; }
.practica .sector { margin: 0 0 6px; font-size: .76rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--verde); }

/* Respaldo profesional */
.respaldo { background: linear-gradient(150deg, var(--azul-osc), #163172 60%, #0f5a46); color: #e6ecff; }
.respaldo h2 { color: #fff; }
.respaldo .intro { color: #c9d5f5; }
.etiqueta-clara { background: rgba(255, 255, 255, .12); color: #b9f0cf; }
.pilares { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.pilar {
  background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 18px; padding: 24px;
  transition: transform .35s ease, background .35s ease, border-color .35s ease;
}
.pilar:hover { background: rgba(255, 255, 255, .1); border-color: rgba(185, 240, 207, .5); }
.pilar-num {
  display: inline-block; font-weight: 800; font-size: .85rem; letter-spacing: .1em;
  background: linear-gradient(90deg, #8fb0ff, #7ee2a8); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.pilar h3 { margin: 8px 0 8px; font-size: 1.12rem; color: #fff; }
.pilar p { margin: 0; font-size: .95rem; color: #c9d5f5; }
.nota-ia { margin: 26px 0 0; font-size: .88rem; color: #a9b8e3; }

/* Aparición al hacer scroll */
.js .revelar { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.js .revelar.visible { opacity: 1; transform: none; }
.js .revelar.visible:hover { transform: translateY(-4px); }
.compromisos { list-style: none; padding: 0; margin: 0 0 32px; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 12px 28px; }
.compromisos li { padding-left: 26px; position: relative; }
.compromisos li::before { content: ""; position: absolute; left: 0; top: .5em; width: 12px; height: 12px; border-radius: 50%; background: var(--verde); }

/* Pie */
footer { background: var(--azul-osc); color: #dbe4ff; padding: 36px 0; font-size: .92rem; }
footer a { color: #fff; }
.pie { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.pie p { margin: 0; }

/* Página legal */
.legal { padding: 56px 0 72px; }
.legal .contenedor { max-width: 780px; }
.legal h1 { color: var(--azul-osc); font-size: clamp(1.8rem, 4vw, 2.4rem); margin: 0 0 6px; }
.legal h2 { font-size: 1.25rem; margin: 34px 0 8px; }
.legal .fecha { color: var(--suave); margin: 0 0 24px; }
.legal li { margin-bottom: 6px; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  nav ul { gap: 16px; }
  .logo img { height: 48px; }
  .portada-grid, .video-grid { grid-template-columns: 1fr; gap: 32px; }
  .panel { display: none; }
  .hero-escena { min-height: 0; padding-top: 48px; padding-bottom: 48px; }
  .hero-titulo { padding: 28px 20px; }
  .logos-derecha img { height: 36px; }
  .logos-derecha .logo-lso { height: 40px; }
  .portada { padding: 56px 0 52px; }
  section { padding: 56px 0; }
}

@media (max-width: 900px) {
  .panel-sectores { display: none; }
  .hero { background:
    linear-gradient(180deg, rgba(6, 14, 40, .55), rgba(8, 22, 64, .75)),
    url("img/atacama-portada-movil.webp") 62% 50% / cover no-repeat, #0b1a45; }
  .practicas-grid { grid-template-columns: repeat(2, 1fr); }
  .pilares { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .pilares, .practicas-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .revelar { opacity: 1; transform: none; transition: none; }
  .practica { transition: none; }
  .hilos path, .nodos circle, .panel { animation: none; }
  .practica:hover .circulo, .practica:hover .circulo img { animation: none; }
}