/* Base: reinicio, tipografía, retícula y utilidades */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

/* <picture> no genera caja: la <img> se dimensiona contra el contenedor del medio */
picture {
  display: contents;
}

img {
  height: auto;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

a {
  color: inherit;
}

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

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.theme-dark :focus-visible,
.theme-purple :focus-visible {
  outline-color: #fff;
}

.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(--gutter);
  z-index: 100;
  padding: 12px 16px;
  background: var(--c-purple);
  color: #fff;
  border-radius: var(--radius);
  text-decoration: none;
}

.skip-link:focus {
  top: 12px;
}

/* Secciones y retícula */
section,
.section {
  background: var(--bg);
  color: var(--fg);
}

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

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

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--grid-gap);
}

/* Tipografía */
.eyebrow {
  display: block;
  font-size: var(--fs-eyebrow);
  font-weight: 500;
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--eyebrow);
}

.h-display {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h2);
  line-height: var(--lh-tight);
  letter-spacing: var(--track-display);
  text-wrap: balance;
}

.h-sub {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h3);
  line-height: var(--lh-snug);
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.lead {
  font-size: var(--fs-lead);
  line-height: 1.5;
  max-width: 56ch;
  text-wrap: pretty;
}

.copy {
  max-width: 60ch;
  text-wrap: pretty;
}

.copy + .copy {
  margin-top: 1.25em;
}

.muted {
  color: var(--fg-muted);
}

.small {
  font-size: var(--fs-small);
}

/* Encabezado de sección: título izquierda, apoyo derecha en escritorio */
.section-head {
  display: grid;
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

.section-head .eyebrow {
  margin-bottom: var(--space-4);
}

.section-head .h-display {
  max-width: 14ch;
}

@media (min-width: 1024px) {
  .section-head {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--grid-gap);
    align-items: end;
    margin-bottom: var(--space-9);
  }

  .section-head__title {
    grid-column: 1 / span 8;
  }

  .section-head__aside {
    grid-column: 9 / span 4;
    padding-bottom: 0.4em;
  }
}

/* Movimiento */
.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.js .reveal.is-in {
  opacity: 1;
  transform: none;
}

.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }
.reveal[data-delay="4"] { transition-delay: 0.4s; }

/* El recorte va en la imagen, no en la figura: si la figura se recorta a cero,
   IntersectionObserver nunca la considera visible y la máscara jamás se abre. */
.js .mask img {
  clip-path: inset(100% 0 0 0);
  transform: scale(1.06);
  transition: clip-path 1.2s var(--ease), transform 1.6s var(--ease);
}

.js .mask.is-in img {
  clip-path: inset(0 0 0 0);
  transform: scale(1);
}

@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;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }

  .js .mask img {
    clip-path: none;
    transform: none;
  }
}