/* ==========================================================================
   EnBlanco · base: reset, tipografía, contenedor/grid, botones, utilidades,
   secciones y entradas por scroll ([data-reveal]).
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overflow-x: clip;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: clip;
  background: var(--c-hueso);
  color: var(--c-tinta);
  font-family: var(--font-text);
  font-size: var(--fs-3);
  font-weight: var(--fw-text);
  line-height: var(--lh-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  -webkit-tap-highlight-color: transparent;
}

img, svg, video, canvas { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .18em; }
p, h1, h2, h3, h4, ul, ol, figure, blockquote { margin: 0; }
ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--fw-title);
  line-height: var(--lh-title);
  letter-spacing: var(--ls-title);
  text-wrap: balance;
}
p { text-wrap: pretty; }

::selection { background: var(--c-terracota); color: var(--c-blanco); }

/* ---- Foco visible: siempre, con teclado ---------------------------------- */
:focus { outline: none; }
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}
main:focus-visible, section:focus-visible { outline: none; }

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

.skip-link {
  position: fixed;
  top: 12px; left: 12px;
  z-index: calc(var(--z-header) + 10);
  padding: 12px 18px;
  border-radius: var(--r-pill);
  background: var(--c-tinta);
  color: var(--c-blanco);
  font-weight: var(--fw-strong);
  font-size: var(--fs-2);
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform var(--dur-ui) var(--ease-out);
}
.skip-link:focus-visible { transform: none; }

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

.grid-12 {
  display: grid;
  grid-template-columns: repeat(var(--grid-cols), minmax(0, 1fr));
  gap: var(--gutter);
}
@media (max-width: 767px) {
  .grid-12 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* ---- Secciones y temas --------------------------------------------------- */
.section {
  position: relative;
  padding-block: var(--section-pad);
  padding-inline: var(--page-pad);  /* el margen lateral vive en la sección */
  background: var(--bg);
  color: var(--text);
  scroll-margin-top: 0; /* el header flota sobre el padding superior de la sección */
}
.section > .container { max-width: var(--container); padding-inline: 0; }
.anchor-alias {
  position: relative;
  display: block;
  height: 0;
  scroll-margin-top: calc(var(--header-h) + var(--s-3)); /* alias a media sección: libra el header */
}

/* Esqueleto provisional. Quitar .shell al construir la sección. */
.shell {
  min-height: 100svh;
  display: flex;
  align-items: center;
}
.shell .container { display: grid; gap: var(--s-3); }
.shell-note {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  justify-self: start;
  padding: 6px 12px;
  border: 1px dashed var(--line);
  border-radius: var(--r-pill);
  color: var(--text-soft);
  font-size: var(--fs-1);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-label);
}
.shell-note::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 2px;
  background: var(--accent);
}

/* ---- Tipografía editorial ------------------------------------------------ */
.display {
  font-family: var(--font-display);
  font-weight: var(--fw-display);
  font-size: var(--fs-6);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-display);
  max-width: 14ch;
  text-wrap: balance;
}
.h2 {
  font-size: var(--fs-5);
  font-weight: var(--fw-display);
  line-height: 1.02;
  letter-spacing: var(--ls-display);
  max-width: 18ch;
}
.h3 {
  font-size: var(--fs-4);
  line-height: var(--lh-title);
}
.lead {
  font-size: var(--fs-4);
  font-family: var(--font-text);
  font-weight: var(--fw-text);
  line-height: 1.4;
  color: var(--text-soft);
  max-width: 38ch;
}
.text-soft { color: var(--text-soft); }

/* Palabra resaltada en bloque terracota (firma tipográfica del sistema) */
.hl {
  /* bloque compacto: no invade la línea de arriba aunque el interlineado sea cerrado */
  display: inline-block;
  padding: .02em .14em .07em;
  margin-inline: -.02em;
  line-height: .92;
  border-radius: .12em;
  background: var(--c-terracota);
  color: var(--c-blanco);
}

/* ---- Botones ------------------------------------------------------------- */
.btn {
  --btn-bg: var(--c-tinta);
  --btn-fg: var(--c-blanco);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: var(--tap-min);
  padding: 12px 22px;
  border-radius: var(--r-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-text);
  font-size: var(--fs-2);
  font-weight: var(--fw-strong);
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition:
    transform var(--dur-press) var(--ease-out),
    background-color var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out);
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}
.btn:active { transform: scale(var(--press-scale)); }
.btn--primary { --btn-bg: var(--c-terracota); --btn-fg: var(--c-blanco); }
.btn--light   { --btn-bg: var(--c-blanco);    --btn-fg: var(--c-tinta); }
.btn--quiet { --btn-bg: var(--surface); --btn-fg: var(--text); } /* paso de tono, sin contorno */
.btn--sm { min-height: 40px; padding: 10px 18px; }
.btn--block { width: 100%; }
.btn__arrow { flex: none; transition: transform var(--dur-ui) var(--ease-out); }

@media (hover: hover) and (pointer: fine) {
  .btn--primary:hover { --btn-bg: var(--c-terracota-press); }
  .btn--light:hover   { --btn-bg: var(--c-hueso); }
  .btn--quiet:hover   { --btn-bg: var(--c-arena); --btn-fg: var(--c-tinta); }
  .btn:hover .btn__arrow { transform: translate(2px, -2px); }
}

/* ---- Tarjeta Bento base -------------------------------------------------- */
.bento {
  position: relative;
  border-radius: var(--r-bento);
  background: var(--surface);
  color: var(--text);
  padding: clamp(var(--s-3), 2.4vw, var(--s-5));
  isolation: isolate; /* en reposo sin sombra: se separa por paso de tono */
}
@media (max-width: 559px) {
  .bento { border-radius: 20px; }
}

/* Etiqueta obligatoria de todo mockup */
.demo-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  background: rgba(17, 17, 17, .72);
  color: var(--c-blanco);
  font-size: var(--fs-1);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-label);
}

/* ---- Toast (aviso breve del selector ES/EN) ------------------------------ */
.toast {
  position: fixed;
  left: 50%;
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: var(--z-toast);
  max-width: min(440px, calc(100vw - 32px));
  padding: 12px 18px;
  border-radius: var(--r-md);
  background: var(--c-tinta);
  color: var(--c-blanco);
  font-size: var(--fs-2);
  line-height: 1.4;
  box-shadow: var(--shadow-3);
  opacity: 0;
  transform: translate(-50%, 12px);
  pointer-events: none;
  transition:
    opacity var(--dur-ui) var(--ease-out),
    transform var(--dur-ui) var(--ease-out);
}
.toast:empty { visibility: hidden; }
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* ---- Entradas por scroll (js/reveal.js) ----------------------------------
   Solo se ocultan si el script marcó <html class="reveal-on"> (JS activo,
   sin movimiento reducido y sin ?static). Sin JS todo se ve. */
.reveal-on [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity var(--dur-reveal) var(--ease-out),
    transform var(--dur-reveal) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal-on [data-reveal="fade"] { transform: none; }
.reveal-on [data-reveal="scale"] { transform: scale(.96); }
.reveal-on [data-reveal].is-revealed { opacity: 1; transform: none; }

/* Movimiento reducido: sin desplazamientos; los fundidos cortos se conservan
   (cada componente quita su transform en su propia hoja). */
@media (prefers-reduced-motion: reduce) {
  .btn:active { transform: none; }
  .btn__arrow { transition: none; }
  .skip-link, .toast { transition-property: opacity; }
}