/* Base: document, type, layout helpers, shared motifs (papel picado, sun), reveal. */

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
  -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  background: var(--c-cream);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: var(--t-body);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: 0;
  color: var(--c-agave);
  text-wrap: balance;
}
p { text-wrap: pretty; }
a { color: var(--c-terra); text-underline-offset: 0.2em; }
a:hover { color: var(--c-terra-dark); }
img { max-width: 100%; height: auto; }
small { font-size: var(--t-micro); }

.container { max-width: 1200px; padding-inline: max(1rem, env(safe-area-inset-left)); }
@media (min-width: 768px) { .container { padding-inline: 1.5rem; } }

main:focus { outline: none; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 2000;
  background: var(--c-ink);
  color: var(--c-cream);
  padding: 0.75rem 1.25rem;
  border-radius: var(--r-pill);
  text-decoration: none;
  font-weight: 700;
}
.skip-link:focus { top: 1rem; color: var(--c-cream); }

/* ---------- sections ---------- */
.seccion { padding-block: clamp(3.5rem, 7vw, 7rem); position: relative; }
.seccion--compacta { padding-block: clamp(2.5rem, 4vw, 4rem); }
.seccion--arena { background: var(--c-sand); }
.seccion--arcilla { background: var(--c-clay); }
.seccion--oscura {
  background: var(--c-agave-deep);
  color: var(--c-cream);
  --focus: var(--c-gold);
}
.seccion--oscura a { color: var(--c-gold); }

.titulo-seccion {
  font-size: var(--t-section);
  margin: 0 0 var(--s-4);
  color: var(--c-agave);
}
.titulo-seccion--claro { color: var(--c-cream); }

.enlace-flecha {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
  color: var(--c-terra);
  text-decoration: none;
  border-bottom: 2px solid currentColor;
  padding-bottom: 1px;
}
.enlace-flecha .ti { transition: transform var(--d-ui) var(--ease-out); }
@media (hover: hover) and (pointer: fine) {
  .enlace-flecha:hover .ti-arrow-right { transform: translateX(4px); }
  .enlace-flecha:hover .ti-arrow-up-right { transform: translate(2px, -2px); }
}

.enlace-boton {
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  font-weight: 700;
  color: var(--c-terra);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  cursor: pointer;
}

/* ---------- reveal on scroll: once, staggered by the script ----------
   Content is hidden only when scripting is on, and a timer shows it anyway if the script never runs. */
@media (scripting: enabled) and (prefers-reduced-motion: no-preference) {
  [data-revelar] {
    opacity: 0;
    transform: translateY(16px);
    animation: revelar-seguro 0s linear 2.5s forwards;
  }
  [data-revelar].is-visible {
    opacity: 1;
    transform: none;
    animation: none;
    transition: opacity var(--d-reveal) var(--ease-out), transform var(--d-reveal) var(--ease-out);
    transition-delay: var(--retardo, 0ms);
  }
}
@keyframes revelar-seguro {
  to { opacity: 1; transform: none; }
}

/* ---------- papel picado ---------- */
.papel-picado { display: block; width: 100%; height: 100%; overflow: visible; }
.papel-picado__hilo { stroke: var(--pp-hilo); stroke-width: 1.5; }
.papel-picado__bandera {
  transform-box: fill-box;
  transform-origin: 50% 0;
}
.papel-picado__bandera--1 path { fill: var(--pp-1); }
.papel-picado__bandera--2 path { fill: var(--pp-2); }
.papel-picado__bandera--3 path { fill: var(--pp-3); }
.papel-picado__bandera--4 path { fill: var(--pp-4); }
@media (prefers-reduced-motion: no-preference) {
  .papel-picado__bandera { animation: balanceo 7s ease-in-out infinite; }
  .papel-picado__bandera--v1 { animation-duration: 8.5s; animation-delay: -2s; }
  .papel-picado__bandera--v2 { animation-duration: 6.5s; animation-delay: -4s; }
}
@keyframes balanceo {
  0%, 100% { transform: rotate(-1.6deg); }
  50% { transform: rotate(1.6deg); }
}

/* ---------- sun ---------- */
.sol { display: block; width: 100%; height: auto; }
.sol__disco { fill: var(--c-gold); }
.sol__rayo { fill: var(--c-gold); }

/* ---------- utilities ---------- */
.visually-hidden-focusable:not(:focus):not(:focus-within) { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- browser surfaces: selection, caret, scrollbars, links ---------- */
::selection { background: var(--c-gold); color: var(--c-ink); }
input, textarea, select { caret-color: var(--c-terra); accent-color: var(--c-agave); }
html { scrollbar-color: rgb(31 77 58 / 0.55) var(--c-cream); }
.seccion--oscura ::selection, .site-footer ::selection { background: var(--c-gold); color: var(--c-ink); }

/* terracotta text only clears 4.5:1 on cream; on the sand and clay bands the darker step is used */
.seccion--arena .enlace-flecha, .seccion--arcilla .enlace-flecha, .seccion--arena a:not(.btn-mn), .seccion--arcilla a:not(.btn-mn) { color: var(--c-terra-dark); }