/* ==========================================================================
   BASE
   Reset acotado, tipografía de documento, accesibilidad y utilidades de layout.
   ========================================================================== */

/* --- Fuentes autohospedadas ---------------------------------------------
   Variables, subset latino, dos archivos en total. Sin llamadas a Google.   */

@font-face {
  font-family: "Newsreader";
  src: url("../../assets/fonts/newsreader-latin-var.woff2") format("woff2-variations");
  font-weight: 200 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191,
    U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Instrument Sans";
  src: url("../../assets/fonts/instrument-sans-latin-var.woff2") format("woff2-variations");
  font-weight: 400 600;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}

/* --- Reset --------------------------------------------------------------- */

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

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + var(--space-4));
}

body {
  background-color: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--type-body);
  line-height: var(--leading-body);
  font-synthesis-weight: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* --- Tipografía de documento --------------------------------------------- */

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 400;
  text-wrap: balance;
}

h1 {
  font-size: var(--type-h1);
  font-weight: 300;
  line-height: var(--leading-h1);
  letter-spacing: var(--track-h1);
  text-transform: uppercase;
}

h2 {
  font-size: var(--type-h2);
  line-height: var(--leading-h2);
  letter-spacing: var(--track-h2);
  text-transform: uppercase;
}

h3 {
  font-size: var(--type-h3);
  line-height: var(--leading-h3);
  letter-spacing: var(--track-h3);
}

p {
  text-wrap: pretty;
}

strong {
  font-weight: 600;
}

/* --- Accesibilidad -------------------------------------------------------- */

:focus-visible {
  outline: 2px solid var(--color-accent-ink);
  outline-offset: 3px;
  transition: outline-color var(--dur-micro) var(--ease-micro);
}

.skip-link {
  position: absolute;
  top: var(--space-2);
  left: var(--space-2);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-ink);
  color: var(--color-bg);
  font-size: var(--type-button);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  text-decoration: none;
  transform: translateY(-150%);
  transition: transform var(--dur-micro) var(--ease-micro);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

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

/* --- Layout --------------------------------------------------------------- */

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

.container--wide {
  max-width: var(--container-wide);
}

.container--text {
  max-width: var(--container-text);
}

.measure {
  max-width: var(--measure);
}

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

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

.section--deep {
  background-color: var(--color-surface-deep);
  color: var(--color-on-deep);
}

/* La separación entre secciones del mismo color la marca un hairline, no aire
   extra: el sitio se estructura con líneas (ver docs/investigacion/01 §2). */
.section + .section:not(.section--surface):not(.section--deep) {
  border-top: var(--hairline);
}

/* --- Reveal on scroll -----------------------------------------------------
   Doble guarda tomada de Vulvi: el bloque sólo se esconde si el usuario NO
   pidió menos movimiento Y hay scripting. Si algo falla, el contenido se ve.  */

@media (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0;
    transform: translateY(20px);
    transition:
      opacity var(--dur-reveal) var(--ease-out),
      transform var(--dur-reveal) var(--ease-out);
    transition-delay: var(--reveal-delay, 0ms);
  }

  [data-reveal][data-revealed] {
    opacity: 1;
    transform: none;
  }
}

@media (scripting: none) {
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}