/* ============================================================
   BASE — reset + tipografía global
   ============================================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-tight);
  font-weight: 600;
}

h1 {
  font-size: var(--fs-h1);
  line-height: var(--lh-tight);
}

h2 {
  font-size: var(--fs-h2);
}

h3 {
  font-size: var(--fs-h3);
}

p {
  color: var(--color-text);
}

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

.lead {
  font-size: var(--fs-lead);
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ---- Utilidades de layout ---- */

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

main {
  display: block;
}

section {
  position: relative;
}

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

.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: -100%;
  left: var(--space-sm);
  background: var(--color-accent);
  color: var(--color-bg);
  padding: var(--space-2xs) var(--space-sm);
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
  transition: top var(--duration-fast) var(--ease-cinema);
}

.skip-link:focus {
  top: var(--space-sm);
}

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

/* Oculta el foco visual solo para mouse, lo mantiene en teclado */
:focus:not(:focus-visible) {
  outline: none;
}

/* ---- Selección de texto ---- */
::selection {
  background: var(--color-accent);
  color: var(--color-bg);
}

/* ---- Scrollbar sutil (progressive enhancement) ---- */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: var(--radius-pill);
}