/* Reset, estilos globales y utilidades */

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

html {
  font-family: var(--font);
  color: var(--ink-body);
  background: var(--surface-page);
  -webkit-font-smoothing: antialiased;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.7;
  overflow-x: hidden;
}

h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.1; text-wrap: balance; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }

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

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--brand) 45%, transparent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* Textura de grano sutil sobre toda la página */
body::after {
  content: ""; position: fixed; inset: 0; z-index: 90; pointer-events: none; opacity: .045;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

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

.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;
}

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  padding: 10px 16px; border-radius: var(--radius-lg);
  background: var(--brand-dark); color: #fff; font-weight: 700;
  transition: top var(--dur-base);
}
.skip-link:focus { top: 16px; }

.icon {
  width: 1.25em; height: 1.25em; flex-shrink: 0;
  fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}

/* Aparición al hacer scroll; --i escalona el retraso */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-slow) ease-out, transform var(--dur-slow) var(--ease-out);
  transition-delay: calc(var(--i, 0) * 75ms);
}
.reveal.is-visible,
.no-js .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    transition-delay: 0s !important;
  }
  .reveal { opacity: 1; transform: none; }
}