/* ============================================================================
   ConectaLabIA · base.css
   Reset, tipografía, contenedores, utilidades y accesibilidad.
   ========================================================================== */

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

html {
  font-size: var(--t-base);
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--alto-nav) + 18px);
}

body {
  margin: 0;
  background: var(--fondo);
  color: var(--texto);
  font-family: var(--fuente);
  font-size: var(--t-cuerpo);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.menu-abierto,
body.modal-abierto {
  overflow: hidden;
}

h1,
h2,
h3,
h4 {
  font-family: var(--fuente-titulo);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 var(--e-4);
  color: var(--texto);
  text-wrap: balance;
}

h1 {
  font-size: var(--t-hero);
}
h2 {
  font-size: var(--t-h2);
}
h3 {
  font-size: var(--t-h3);
  letter-spacing: -0.008em;
}

p {
  margin: 0 0 var(--e-4);
  color: var(--texto-medio);
  text-wrap: pretty;
}

a {
  color: var(--azul-claro);
  text-decoration: none;
  transition: color var(--rapido) var(--curva);
}

a:hover {
  color: var(--texto);
}

strong {
  color: var(--texto);
  font-weight: 600;
}

code,
kbd,
samp,
pre {
  font-family: var(--fuente-tecnica);
  font-size: 0.86em;
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

ul,
ol {
  margin: 0 0 var(--e-4);
  padding-left: 1.15em;
  color: var(--texto-medio);
}

li + li {
  margin-top: var(--e-2);
}

::selection {
  background: rgba(0, 163, 104, 0.24);
  color: var(--texto);
}

:focus-visible {
  outline: 2px solid var(--cian);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

::-webkit-scrollbar {
  width: 11px;
  height: 11px;
}
::-webkit-scrollbar-track {
  background: var(--fondo-2);
}
::-webkit-scrollbar-thumb {
  background: #b3bfcd;
  border-radius: 8px;
  border: 2px solid var(--fondo-2);
}
::-webkit-scrollbar-thumb:hover {
  background: #9aa7b7;
}

/* ------------------------------- Contenedores ------------------------------ */

.contenedor {
  width: 100%;
  max-width: var(--ancho-max);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

.contenedor-angosto {
  max-width: 860px;
}

.seccion {
  position: relative;
  padding-block: var(--seccion-padding-block);
}

.seccion--ajustada {
  padding-block: var(--seccion-padding-block-ajustada);
}

/* ------------------------------- Cabeceras --------------------------------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--e-2);
  font-family: var(--fuente);
  font-size: var(--t-eyebrow);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cian);
  margin-bottom: var(--e-4);
}

.eyebrow::before {
  content: '';
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cian));
}

.titulo-seccion {
  max-width: var(--ancho-titulo-seccion);
}

.bajada {
  max-width: var(--ancho-lectura);
  font-size: var(--t-bajada);
  color: var(--texto-medio);
}

.cabecera-seccion {
  margin-bottom: var(--cabecera-seccion-margin);
}

.cabecera-seccion--centrada {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cabecera-seccion--centrada .titulo-seccion {
  max-width: min(100%, var(--ancho-titulo-seccion-centrada));
}

.cabecera-seccion--centrada .bajada {
  max-width: 60ch;
}

.texto-degradado {
  background: var(--degradado-texto);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* -------------------------------- Utilidades ------------------------------- */

.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;
}

.saltar-enlace {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: var(--z-aviso);
  transform: translateY(-160%);
  background: var(--verde);
  color: #ffffff;
  font-weight: 600;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  transition: transform var(--rapido) var(--curva);
}

.saltar-enlace:focus {
  transform: translateY(0);
  color: #ffffff;
}

.pila {
  display: flex;
  flex-wrap: wrap;
  gap: var(--e-3);
  align-items: center;
}

.lista-limpiar {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mono {
  font-family: var(--fuente-mono);
  font-size: 0.9em;
}

.apagado {
  color: var(--texto-suave);
}

.nowrap {
  white-space: nowrap;
}

/* ---------------------------- Fondos decorativos ---------------------------- */

.fondo-capa {
  position: fixed;
  inset: 0;
  z-index: var(--z-fondo);
  pointer-events: none;
}

.fondo-rejilla {
  background-image: linear-gradient(rgba(20, 50, 80, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 50, 80, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 100% 70% at 50% 0%, #000 12%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 100% 70% at 50% 0%, #000 12%, transparent 78%);
}

.fondo-aurora {
  background: radial-gradient(42% 38% at 12% 4%, rgba(0, 163, 104, 0.1), transparent 62%),
    radial-gradient(38% 34% at 88% 8%, rgba(47, 124, 158, 0.12), transparent 64%),
    radial-gradient(46% 40% at 50% 96%, rgba(14, 154, 167, 0.09), transparent 68%);
}

.fondo-grano {
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='r'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23r)'/%3E%3C/svg%3E");
}

/* Halo que sigue al puntero (lo mueve ui.js). */
.halo-puntero {
  position: fixed;
  top: 0;
  left: 0;
  width: 640px;
  height: 640px;
  margin: -320px 0 0 -320px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 2;
  background: radial-gradient(circle, rgba(0, 163, 104, 0.1), rgba(47, 124, 158, 0.06) 42%, transparent 70%);
  opacity: 0;
  transition: opacity 0.5s var(--curva);
  will-change: transform;
}

body.puntero-fino .halo-puntero {
  opacity: 1;
}

/* Barra de progreso de lectura: es la "línea de flujo" de la página. */
.progreso-flujo {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  z-index: var(--z-aviso);
  background: var(--degradado-marca);
  box-shadow: 0 0 16px rgba(0, 163, 104, 0.55);
  transition: width 0.1s linear;
}

/* ---------------------------- Modo sin efectos ----------------------------- */

body.efectos-off .halo-puntero,
body.efectos-off .fondo-grano {
  display: none;
}

body.efectos-off .fondo-aurora {
  opacity: 0.5;
}