/* ==========================================================================
   VortexNeural — Base
   Reset, tipografía base, utilidades globales, accesibilidad de foco.
   ========================================================================== */

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

* {
  margin: 0;
}

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

body {
  background: var(--bg-base);
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

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

img {
  outline: 1px solid rgba(255, 255, 255, 0.1);
  outline-offset: -1px;
  border-radius: inherit;
}

img[aria-hidden="true"], img.no-outline {
  outline: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  line-height: var(--lh-heading);
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); font-weight: 800; letter-spacing: -0.01em; }
h2 { font-size: var(--fs-h2); font-weight: 700; letter-spacing: -0.008em; }
h3 { font-size: var(--fs-h3); font-weight: 700; }
h4 { font-size: var(--fs-h4); font-weight: 600; }

p {
  text-wrap: pretty;
}

/* Números dinámicos (nunca hay contadores en vivo aquí, pero mantiene coherencia
   si en el futuro se añaden cifras/tiempos) */
.tabular-nums {
  font-variant-numeric: tabular-nums;
}

.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;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  z-index: 200;
  background: var(--silver-100);
  color: var(--text-on-silver);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--dur-base) var(--ease-out);
}

.skip-link:focus-visible {
  top: var(--space-4);
}

:focus-visible {
  outline: 2px solid var(--accent-blue-strong);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

.section {
  padding-block: var(--space-9);
}

.section--alt {
  background: var(--surface-1);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-7);
}

.section-head p {
  color: var(--text-secondary);
  font-size: var(--fs-body-lg);
  margin-top: var(--space-3);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-caption);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-blue-strong);
}

@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;
  }
}