/* =========================================================
   BASE — variables de diseño, reset y tipografía
   Para cambiar la identidad visual, editá las variables de :root
   ========================================================= */

:root {
  /* Colores */
  --bg: #f6f4f0;
  --surface: #ffffff;
  --sand: #ece7de;
  --sand-deep: #e3dcd0;
  --ink: #1c1b19;
  --ink-soft: #494640;
  --muted: #6b6760;          /* texto secundario: contraste AA sobre --bg */
  --line: #e2ddd4;
  --line-strong: #c9c2b6;
  --accent: #8a4b2e;         /* suela: precio mayorista y detalles */
  --danger: #9a3b2e;
  --on-ink: #efeae2;
  --on-ink-muted: #b3ada3;

  /* Tipografía */
  --font: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: clamp(1.75rem, 1.3rem + 1.9vw, 2.75rem);
  --fs-hero: clamp(2.75rem, 1.6rem + 5vw, 5.5rem);

  /* Espaciado y forma */
  --gutter: clamp(1.25rem, 0.8rem + 2vw, 2.5rem);
  --section: clamp(4.5rem, 3rem + 6vw, 8.5rem);
  --radius: 2px;
  --header-h: 60px;

  /* Movimiento */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --t-fast: 160ms;
  --t: 260ms;
}

@media (min-width: 900px) {
  :root { --header-h: 72px; }
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  scrollbar-gutter: stable;
}
html.is-locked { overflow: hidden; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-base);
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
ul, ol { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, p, dl, dd { margin: 0; }
[hidden] { display: none !important; }

::selection { background: var(--ink); color: var(--bg); }

:focus-visible {
  outline: 1.5px solid var(--ink);
  outline-offset: 3px;
}

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

.skip-link {
  position: absolute;
  left: 1rem; top: -3rem;
  z-index: 100;
  padding: 0.5rem 1rem;
  background: var(--ink); color: var(--bg);
}
.skip-link:focus { top: 1rem; }

/* Imágenes: aparecen con un fundido corto al terminar de cargar */
img[data-fade] { opacity: 0; transition: opacity 500ms var(--ease); }
img[data-fade].is-loaded { opacity: 1; }
img[data-fade].is-broken { opacity: 0; }

/* Aparición progresiva de secciones (solo si JavaScript está activo) */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 800ms var(--ease), transform 800ms var(--ease);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

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