/* LIGHT TRONIC — base: reset, tipografía, layout primitives */

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

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

body {
  margin: 0;
  background: var(--void);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-stretch: 112%;
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-3);
  text-wrap: balance;
}

h1 {
  font-size: var(--text-hero);
  font-weight: 800;
}

h2 {
  font-size: var(--text-3xl);
}

h3 {
  font-size: var(--text-xl);
}

p {
  margin: 0 0 var(--space-3);
  max-width: 62ch;
}

a {
  color: var(--brand-bright);
  text-decoration: none;
}

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

img,
svg,
video {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

/* Foco luminoso — visible siempre, coherente con el concepto */
:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 2px;
  box-shadow: 0 0 14px -2px var(--glow-brand);
}

::selection {
  background: var(--brand);
  color: var(--ink);
}

/* Layout */
.container {
  width: min(var(--container), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.section {
  padding-block: var(--space-7);
  position: relative;
}

/* Cabecera de sección: eyebrow técnica + título */
.section-head {
  margin-bottom: var(--space-5);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brand-bright);
  margin-bottom: var(--space-3);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand));
  box-shadow: 0 0 8px var(--glow-brand);
}

.section-lead {
  color: var(--text-dim);
  font-size: var(--text-lg);
  max-width: 56ch;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 200;
  background: var(--surface-2);
  color: var(--text);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  transform: translateY(-300%);
  transition: transform var(--dur-fast);
}

.skip-link:focus {
  transform: none;
}