/* ==========================================================================
   Reset acotado y fundamentos tipográficos.
   ========================================================================== */

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

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100dvh;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Dos halos de color muy tenues dan profundidad sin competir con el contenido. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 620px at 12% -8%, var(--bg-canvas-glow-1), transparent 62%),
    radial-gradient(760px 520px at 92% 4%, var(--bg-canvas-glow-2), transparent 58%);
  pointer-events: none;
}

/* Retícula técnica de fondo: refuerza el carácter de panel de control. */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 25%, transparent 78%);
  pointer-events: none;
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

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

h1, h2, h3, h4 {
  line-height: var(--leading-tight);
  font-weight: 640;
  letter-spacing: -0.022em;
}

h1 { font-size: var(--text-xl); }
h2 { font-size: var(--text-lg); }
h3 { font-size: var(--text-md); }

/* Los importes y contadores usan cifras de ancho fijo para que no "bailen". */
.numeric {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.92em;
  letter-spacing: -0.01em;
}

/* --- Accesibilidad --- */
:focus-visible {
  outline: 2px solid var(--brand-1);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

:focus:not(:focus-visible) {
  outline: none;
}

.visually-hidden {
  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: var(--space-3);
  left: var(--space-3);
  z-index: 200;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  background: var(--surface-solid);
  border: 1px solid var(--border-strong);
  transform: translateY(-200%);
  transition: transform var(--duration-fast) var(--ease);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* --- Scrollbars --- */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

*::-webkit-scrollbar-track {
  background: transparent;
}

*::-webkit-scrollbar-thumb {
  background: var(--border-default);
  border-radius: var(--radius-pill);
  border: 3px solid transparent;
  background-clip: content-box;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--border-strong);
  background-clip: content-box;
}

::selection {
  background: rgba(99, 102, 241, 0.35);
  color: var(--text-primary);
}

/* --- Motion reducido: se respeta la preferencia del sistema --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}