/* ===== Base global OVIQA ===== */

:root {
  color-scheme: light dark;

  /* Layout tokens */
  --container: 1100px;
  --nav-h: 64px;
  --bb-h: 0px;
  --gap: 0.75rem;

  /* Colores (claro por defecto) */
  --c-bg: #ffffff;
  --c-bg-alt: #f3f4f6;
  --c-surface: #f9fafb;
  --c-surface-elevated: #ffffff;
  --c-text: #0b1220;
  --c-primary: #0a66ff;
  --c-primary-soft: rgba(10, 102, 255, 0.08);
  --c-border: #8a95a3;
  --c-divider: #e5e7eb;

  /* Popup / menús */
  --menu-bg: #ffffff;
  --menu-text: #0b1220;
  --menu-border: #d1d5db;
  --menu-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);

  /* Radios y sombras */
  --radius-lg: 1.25rem;
  --radius-md: 0.9rem;
  --radius-sm: 0.6rem;
  --shadow-soft: 0 14px 30px rgba(15, 23, 42, 0.12);
  --shadow-subtle: 0 10px 20px rgba(15, 23, 42, 0.06);

  /* Transiciones */
  --transition-fast: 0.16s ease-out;
  --transition-med: 0.22s ease-out;

  /* ===== Tokens globales para hover de “bloques” (NO botones / NO navbar) =====
     Se consumen desde components/cards.css y sections/*.css para unificar comportamiento. */
  --block-hover-translate-y: -3px;
  --block-hover-scale: 1.01;
  --block-hover-border: rgba(37, 99, 235, 0.35);
  --block-hover-bg: #ffffff;
  --block-hover-shadow: var(--shadow-soft);

  /* Estado “hover” en dark (se overridea en [data-theme="dark"] / prefers-color-scheme) */
  --block-hover-shadow-dark: 0 22px 50px rgba(0, 0, 0, 0.9);
  --block-hover-border-dark: rgba(96, 165, 250, 0.9);
  --block-hover-bg-dark: var(--c-surface);

  /* Transición estándar para bloques */
  --block-hover-transition: transform var(--transition-med),
    box-shadow var(--transition-med),
    border-color var(--transition-med),
    background-color var(--transition-med);
}

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

/* Body + tipografía */
html,
body {
  margin: 0;
  padding: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family:
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Ubuntu,
    Cantarell,
    "Helvetica Neue",
    Arial,
    "Noto Sans",
    sans-serif;
  line-height: 1.5;
  max-width: 100%;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Tipografía base */
body {
  font-size: 16px;
}

/* Imágenes responsivas por defecto */
img {
  max-width: 100%;
  height: auto;
}

/* Titulares */
h1,
h2,
h3,
h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-text);
  margin: 0 0 0.4rem;
}

/* Párrafos */
p {
  margin: 0 0 0.75rem;
}

/* Enlaces */
a {
  color: inherit;
  text-decoration: none;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition:
    color var(--transition-fast),
    text-decoration-color var(--transition-fast),
    opacity var(--transition-fast);
}

a:hover {
  text-decoration: underline;
  text-decoration-color: rgba(15, 23, 42, 0.35);
}

/* Elementos interactivos: transiciones suaves */
button,
.btn,
.bb-item,
input,
select,
textarea,
details summary {
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

/* Interactivos: cursor apuntador coherente */
button,
.btn,
.bb-item,
details summary,
[role="button"],
[role="menuitem"] {
  cursor: pointer;
}

/* Hover base para CTAs (se suma a estilos específicos) */
:where(button, .btn, .bb-item):hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-subtle);
}

:where(button, .btn, .bb-item):active {
  transform: translateY(0);
  box-shadow: none;
}

/* Focus visible accesible y consistente */
:where(
    a,
    button,
    .btn,
    .bb-item,
    input,
    select,
    textarea,
    details summary,
    [role="button"],
    [role="menuitem"]
  ):focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 2px var(--c-primary-soft);
}

/* Skip link accesible */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  background: #000;
  color: #fff;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
}
.skip-link:focus-visible {
  left: 1rem;
  top: 1rem;
}

/* Utilidad: solo visible para lectores de pantalla */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Reduce motion global */
@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* Tema oscuro automático */
@media (prefers-color-scheme: dark) {
  :root {
    --c-bg: #020617;
    --c-bg-alt: #020617;
    --c-surface: #020617;
    --c-surface-elevated: #020617;
    --c-text: #f5f5f6;
    --c-border: #9aa3af;
    --c-divider: #1f2937;
    --menu-bg: #111214;
    --menu-text: #f5f5f6;
    --menu-border: #222733;
    --menu-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);

    /* Tokens hover de bloques en dark (auto) */
    --block-hover-bg: var(--block-hover-bg-dark);
    --block-hover-border: var(--block-hover-border-dark);
    --block-hover-shadow: var(--block-hover-shadow-dark);
  }
}

/* Tema forzado por usuario con data-theme */
:root[data-theme="light"] {
  color-scheme: light;
  --c-bg: #ffffff;
  --c-bg-alt: #f3f4f6;
  --c-surface: #f9fafb;
  --c-surface-elevated: #ffffff;
  --c-text: #0b1220;
  --c-border: #8a95a3;
  --c-divider: #e5e7eb;
  --menu-bg: #ffffff;
  --menu-text: #0b1220;
  --menu-border: #d1d5db;
  --menu-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);

  /* Tokens hover de bloques en light */
  --block-hover-bg: #ffffff;
  --block-hover-border: rgba(37, 99, 235, 0.35);
  --block-hover-shadow: var(--shadow-soft);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --c-bg: #020617;
  --c-bg-alt: #020617;
  --c-surface: #020617;
  --c-surface-elevated: #020617;
  --c-text: #f5f5f6;
  --c-border: #9aa3af;
  --c-divider: #1f2937;
  --menu-bg: #111214;
  --menu-text: #f5f5f6;
  --menu-border: #222733;
  --menu-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);

  /* Tokens hover de bloques en dark (forzado) */
  --block-hover-bg: var(--block-hover-bg-dark);
  --block-hover-border: var(--block-hover-border-dark);
  --block-hover-shadow: var(--block-hover-shadow-dark);
}