/* Navajas — Reset + estilos base */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--color-negro-base);
  color: var(--color-texto-claro);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img,
picture,
video {
  max-width: 100%;
  display: block;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  line-height: 1.1;
  margin: 0 0 var(--space-4);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 {
  font-size: var(--fs-display-xl);
}

h2 {
  font-size: var(--fs-display-lg);
}

h3 {
  font-size: var(--fs-display-md);
}

p {
  margin: 0 0 var(--space-4);
  color: var(--color-texto-claro);
}

a {
  color: var(--color-azul-led-suave);
  text-decoration: none;
}

a:hover {
  color: var(--color-azul-led);
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

button {
  cursor: pointer;
}

/* Foco visible consistente (accesibilidad) */
:focus-visible {
  outline: 3px solid var(--color-azul-led);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Utilidad: saltar al contenido (accesibilidad de teclado) */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-azul-led);
  color: #fff;
  padding: var(--space-3) var(--space-4);
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
  left: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-8);
  }
}

.section {
  padding-block: var(--space-16);
}

.section--tight {
  padding-block: var(--space-12);
}

.section-eyebrow {
  display: block;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: var(--fs-tiny);
  color: var(--color-azul-led-suave);
  margin-bottom: var(--space-2);
}

.section-heading {
  max-width: 42rem;
  margin-bottom: var(--space-8);
}

.section-heading p {
  color: var(--color-texto-muted);
  font-size: var(--fs-body-lg);
}

/* Divisor "filo de navaja" — elemento firma del sistema visual */
.blade-divider {
  position: relative;
  height: 2px;
  margin-block: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-plateado) 15%,
    var(--color-azul-led-suave) 50%,
    var(--color-plateado) 85%,
    transparent 100%
  );
  opacity: 0.55;
}

/* Revelado sutil al hacer scroll (aplicado por main.js vía IntersectionObserver;
   la clase la agrega el propio JS, nunca el HTML/PHP — así, si JS no corre,
   el contenido nunca queda invisible por defecto). */
.fade-in-section {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-reveal) var(--ease-out), transform var(--dur-reveal) var(--ease-out);
}

.fade-in-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}