/* =============================================================
   Globals — reset, base y utilidades
   ============================================================= */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  background: var(--color-background);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  min-height: 100vh;
}

img, svg, video, canvas { display: block; max-width: 100%; }
img { height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
table { border-collapse: collapse; }
[hidden] { display: none !important; }

::selection { background: var(--color-accent); color: var(--color-dark); }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
.on-primary :focus-visible,
.on-dark :focus-visible { outline-color: var(--color-accent); }

/* ---------- Utilidades ---------- */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container-text { max-width: var(--container-text); }

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

.skip-link {
  position: fixed; top: -100px; left: var(--space-4);
  z-index: var(--z-toast);
  padding: var(--space-3) var(--space-4);
  background: var(--color-accent); color: var(--color-dark);
  border-radius: var(--radius-md);
  font-weight: var(--weight-semibold);
}
.skip-link:focus { top: var(--space-4); }

.stack > * + * { margin-top: var(--space-4); }
.stack-sm > * + * { margin-top: var(--space-2); }
.stack-lg > * + * { margin-top: var(--space-8); }
.row { display: flex; align-items: center; gap: var(--space-3); }
.row-wrap { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); }
.spacer { flex: 1; }
.center { text-align: center; }

.icon {
  width: var(--icon-md); height: var(--icon-md);
  flex: none;
  stroke: currentColor; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}
.icon-sm { width: var(--icon-sm); height: var(--icon-sm); }
.icon-lg { width: var(--icon-lg); height: var(--icon-lg); }

/* Aparición discreta (150–250ms) */
@keyframes aparecer {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}
@keyframes girar { to { transform: rotate(360deg); } }
.aparece { animation: aparecer var(--duration-slow) var(--ease) both; }

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