/* ==========================================================================
   BASE.CSS
   Reset ligero + estilos tipográficos y de elementos base.
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

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

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  line-height: var(--lh-tight);
  font-weight: 600;
  color: #ffffff;
}

h1 { font-size: var(--fs-hero); font-weight: 700; }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }

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

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover,
a:focus-visible {
  color: var(--color-secondary);
}

ul,
ol {
  list-style: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: var(--fs-base);
  color: var(--color-text);
}

/* --- Accesibilidad: foco visible consistente --- */
:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* --- Utilidad: solo visible para lectores de pantalla --- */
.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;
}

/* --- Enlace "saltar al contenido" (accesibilidad por teclado) --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  z-index: 2000;
  background: var(--color-primary);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-fast);
}

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

/* --- Contenedor general --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* --- Selección de texto --- */
::selection {
  background: var(--color-primary);
  color: #ffffff;
}