/* Base: reset, tipografia y accesibilidad. Solo usa tokens. */

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

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-page);
  overflow-x: hidden;
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

h1 {
  font-size: var(--font-size-xl);
}

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

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

p,
li {
  max-width: 70ch;
  line-height: var(--line-height-relaxed);
}

ul,
ol {
  list-style: none;
}

a {
  color: var(--color-text-primary);
  text-decoration: underline;
  text-underline-offset: var(--space-1);
}

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

code,
pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

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

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

/* Objetivos: 36px con puntero fino y 44px en tactil (--btn-min-height cambia en pointer: coarse) */
button,
select,
input:not([type='range'], [type='checkbox']),
summary {
  min-height: var(--btn-min-height);
}

button,
summary {
  min-width: var(--btn-min-height);
}

.tap-target {
  min-width: var(--tap-min);
  min-height: var(--tap-min);
}

/* Foco reforzado (>= 2px, >= 3:1); el anillo verde de 10 % de la app era casi invisible */
:focus-visible {
  outline: var(--focus-width) solid var(--color-focus-ring);
  outline-offset: var(--focus-offset);
  box-shadow: var(--shadow-focus);
}

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

[tabindex='-1']:focus {
  outline: none;
  box-shadow: none;
}

/* Botones: lenguaje del CTA de la landing (pildora, degradado) en version ligera. Solo tokens --btn-* */
.btn {
  position: relative;
  isolation: isolate;
  min-height: var(--btn-min-height);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--btn-pad-x);
  border: var(--border-width) solid var(--btn-secondary-border);
  border-radius: var(--btn-radius);
  background-color: var(--color-bg-card);
  background-image: linear-gradient(var(--btn-secondary-tint), var(--btn-secondary-tint));
  color: var(--btn-secondary-text);
  font-weight: var(--btn-weight);
  font-size: var(--btn-font-size);
  letter-spacing: var(--btn-tracking);
  line-height: var(--btn-line-height);
  white-space: nowrap;
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base),
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

.btn:hover {
  border-color: var(--btn-secondary-border-hover);
  background-image: linear-gradient(var(--btn-secondary-tint-hover), var(--btn-secondary-tint-hover));
  box-shadow: var(--btn-secondary-glow);
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn--icon {
  width: var(--btn-min-height);
  padding: 0;
}

.btn--ghost {
  border-color: transparent;
  background-color: transparent;
  background-image: none;
}

.btn--ghost:hover {
  border-color: var(--btn-secondary-border);
  background-image: linear-gradient(var(--btn-secondary-tint), var(--btn-secondary-tint));
  box-shadow: none;
}

.btn--primary {
  overflow: hidden;
  border-color: transparent;
  background: var(--btn-primary-bg);
  box-shadow: var(--btn-primary-shadow);
  color: var(--btn-primary-text);
}

/* Capa mas brillante que aparece al pasar (un degradado no se anima: se funde por opacidad) */
.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: var(--btn-primary-bg-hover);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.btn--primary:hover {
  border-color: transparent;
  background: var(--btn-primary-bg);
  box-shadow: var(--btn-primary-glow);
}

.btn--primary:hover::before {
  opacity: 1;
}

@media (hover: hover) {
  .btn:not(.btn--icon):not(:disabled):hover {
    transform: translateY(var(--btn-lift));
  }

  .btn:not(.btn--icon):not(:disabled):active {
    transform: translateY(1px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn,
  .btn--primary::before {
    transition: none;
  }

  .btn:not(.btn--icon):not(:disabled):hover,
  .btn:not(.btn--icon):not(:disabled):active {
    transform: none;
  }
}

.icon {
  flex: none;
  width: var(--space-5);
  height: var(--space-5);
  fill: none;
  stroke: currentColor;
  stroke-width: var(--stroke-base);
  stroke-linecap: round;
  stroke-linejoin: round;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: absolute;
  inset-block-start: var(--space-2);
  inset-inline-start: var(--space-2);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

/* Scrollbars finos, sensibles al tema */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-scrollbar) transparent;
}

/* Movimiento reducido: sin transiciones ni animaciones */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}