/* Extrema — hoja de estilos
   Objetivo WCAG 2.2 AAA: contraste ≥ 7:1 (1.4.6), presentación visual (1.4.8),
   foco visible reforzado (2.4.13), tamaño de objetivo ≥ 44 px (2.5.5),
   sin animaciones por defecto (2.3.3), sin cabecera fija que tape el foco (2.4.12). */

/* ---------- Tokens ---------- */
:root {
  --bg: #ffffff;
  --bg-alt: #f3f5f9;
  --surface: #ffffff;
  --text: #14171f;
  --muted: #3d4556;
  --brand: #0b2f6b;
  --on-brand: #ffffff;
  --accent: #ffd400;
  --on-accent: #0b2f6b;
  --border: #5b6475;
  --focus: #0b2f6b;
  --danger: #a1001f;
  --success: #0a5c36;
  --cta-bg: #0b2f6b;
  --cta-text: #ffffff;
  --code-bg: #e8eef8;
  --radius: 1rem;
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --mono: ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0e1320;
    --bg-alt: #161d2e;
    --surface: #161d2e;
    --text: #f2f4f8;
    --muted: #c3cad8;
    --brand: #9ec5ff;
    --on-brand: #0e1320;
    --border: #8a93a6;
    --focus: #ffd400;
    --danger: #ffb3be;
    --success: #9be7c0;
    --cta-bg: #1c2c52;
    --code-bg: #0e1320;
    color-scheme: dark;
  }
}

:root[data-theme='dark'] {
  --bg: #0e1320;
  --bg-alt: #161d2e;
  --surface: #161d2e;
  --text: #f2f4f8;
  --muted: #c3cad8;
  --brand: #9ec5ff;
  --on-brand: #0e1320;
  --border: #8a93a6;
  --focus: #ffd400;
  --danger: #ffb3be;
  --success: #9be7c0;
  --cta-bg: #1c2c52;
  --code-bg: #0e1320;
  color-scheme: dark;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.125rem;
  line-height: 1.6;
  overflow-wrap: break-word;
}

img,
svg {
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3,
h4 {
  line-height: 1.25;
  margin: 0 0 0.75em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2rem, 1.4rem + 2.8vw, 3.25rem);
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.6rem, 1.3rem + 1.4vw, 2.25rem);
}

h3 {
  font-size: 1.3rem;
}

/* 1.4.8: interlineado ≥ 1,5 y espacio entre párrafos ≥ 1,5 veces el interlineado */
p,
ul,
ol,
dl,
figure,
pre,
.table-wrap {
  margin: 0 0 1.75em;
}

/* 1.4.8: líneas de 80 caracteres como máximo; texto sin justificar */
p,
li,
dd,
dt,
figcaption,
.field__hint {
  max-width: 70ch;
  text-align: start;
}

li + li {
  margin-top: 0.5em;
}

a {
  color: var(--brand);
  text-decoration-line: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 0.18em;
}

a.term {
  text-decoration-style: dotted;
}

abbr[title] {
  text-decoration: none;
}

strong {
  font-weight: 700;
}

code {
  font-family: var(--mono);
  font-size: 0.92em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 0.35em;
}

/* 2.4.7 / 2.4.13: foco muy visible, grueso y con separación */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  box-shadow: 0 0 0 6px var(--bg);
}

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

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.wrap {
  width: 100%;
  max-width: 76rem;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

/* ---------- Enlace para saltar ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: 1rem;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 700;
  border-radius: 0.5rem;
  transform: translateY(-200%);
}

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

/* ---------- Botones ---------- */
.button,
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  min-width: 48px;
  padding: 0.7rem 1.4rem;
  border: 2px solid transparent;
  border-radius: 999px;
  font: inherit;
  font-weight: 700;
  line-height: 1.3;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

.button {
  background: var(--brand);
  color: var(--on-brand);
}

.button--accent {
  background: var(--accent);
  color: var(--on-accent);
  border-color: var(--on-accent);
}

.button--ghost {
  background: transparent;
  color: var(--brand);
  border-color: var(--brand);
}

.button:hover {
  text-decoration: underline;
  text-decoration-thickness: 0.12em;
}

.icon-button {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
  padding: 0.5rem 0.9rem;
  font-size: 1rem;
}

.icon-button:hover {
  background: var(--bg-alt);
}

/* Los controles que dependen de JavaScript solo se muestran si está activo */
.theme-toggle,
.nav-toggle {
  display: none;
}

.js .theme-toggle {
  display: inline-flex;
}

/* ---------- Cabecera (no fija: el foco nunca queda tapado, 2.4.12) ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  padding-block: 0.75rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 48px;
  color: var(--text);
  text-decoration: none;
  margin-inline-end: auto;
}

.brand__mark {
  flex: none;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand__name {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.brand__tag {
  font-size: 0.95rem;
  color: var(--muted);
}

.site-header__tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  order: 2;
}

.site-nav {
  order: 3;
  flex-basis: 100%;
  margin-inline: -0.75rem;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav li + li {
  margin-top: 0;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
}

.site-nav a:hover {
  text-decoration: underline;
  text-decoration-thickness: 0.12em;
}

.site-nav a[aria-current] {
  background: var(--bg-alt);
  box-shadow: inset 0 -4px 0 var(--brand);
  text-decoration: none;
}

@media (max-width: 52rem) {
  .js .nav-toggle {
    display: inline-flex;
  }
  .js .site-nav:not(.is-open) {
    display: none;
  }
  .site-nav ul {
    flex-direction: column;
    padding-block: 0.5rem;
  }
  .site-nav a {
    width: 100%;
  }
  .brand__tag {
    font-size: 0.875rem;
  }
}

/* ---------- Ruta de navegación ---------- */
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0.25rem 0;
  font-size: 1rem;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  margin: 0;
}

.breadcrumb li + li::before {
  content: '/';
  padding-inline: 0.5rem;
  color: var(--muted);
}

.breadcrumb a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.breadcrumb a[aria-current='page'] {
  color: var(--text);
  text-decoration: none;
}

/* ---------- Cabecera de página ---------- */
.hero {
  padding-block: clamp(2rem, 5vw, 4.5rem);
  background: linear-gradient(180deg, var(--bg-alt), var(--bg));
}

.hero__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 56rem) {
  .hero__grid {
    grid-template-columns: 1.15fr 1fr;
  }
}

.hero__grid > *,
.split > * {
  min-width: 0;
}

.hero__figure {
  margin: 0;
}

.hero__figure img {
  display: block;
  width: 100%;
  border-radius: 1.75rem;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 1rem;
  padding: 0.25rem 0.85rem;
  border: 2px solid var(--brand);
  border-radius: 999px;
  color: var(--text);
  font-weight: 700;
  font-size: 1rem;
}

.lead {
  font-size: clamp(1.2rem, 1.1rem + 0.4vw, 1.4rem);
  color: var(--text);
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  max-width: none;
}

/* ---------- Secciones ---------- */
.section {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.section--alt {
  background: var(--bg-alt);
}

.split {
  display: grid;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 56rem) {
  .split {
    grid-template-columns: 1.3fr 1fr;
  }
}

.figure {
  margin: 0;
}

.figure img {
  display: block;
  width: 100%;
  border-radius: 1.5rem;
}

.figure figcaption {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 1rem;
}

/* ---------- Resumen ---------- */
.summary-section {
  padding-top: 2rem;
}

.summary {
  max-width: 76ch;
  padding: 1.5rem clamp(1.25rem, 3vw, 2rem);
  border-inline-start: 0.5rem solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--bg-alt);
}

.summary h2 {
  font-size: 1.4rem;
}

.summary ul {
  margin-bottom: 0;
}

/* ---------- Tarjetas ---------- */
.cards,
.features {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15.5rem), 1fr));
  list-style: none;
  margin: 0 0 1.75em;
  padding: 0;
}

.cards li,
.features li {
  margin: 0;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.card img {
  display: block;
  width: 100%;
  margin-bottom: 1rem;
  border-radius: 0.75rem;
}

.card__title a {
  color: var(--brand);
}

/* Toda la tarjeta es clicable, pero el enlace (y su texto) sigue siendo uno solo */
.card__title a::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
}

.card:hover {
  border-color: var(--brand);
}

.card:focus-within {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.card__title a:focus-visible {
  outline: none;
  box-shadow: none;
}

.card p {
  margin-bottom: 0;
}

.features li {
  padding: 1.25rem 1.25rem 1.25rem 1.5rem;
  border-inline-start: 0.35rem solid var(--brand);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.section--alt .features li {
  background: var(--bg);
}

.features h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.features p {
  margin: 0;
}

.columns {
  columns: 2 14rem;
  column-gap: 2rem;
}

.columns li {
  break-inside: avoid;
}

/* ---------- Pasos ---------- */
.steps {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  padding: 0;
  list-style-position: inside;
  counter-reset: none;
}

.steps li {
  margin: 0;
  padding: 1.25rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.steps li::marker {
  color: var(--brand);
  font-weight: 800;
  font-size: 1.4rem;
}

.steps h3 {
  display: inline;
  font-size: 1.2rem;
}

.steps p {
  margin: 0.5rem 0 0;
}

/* ---------- Preguntas frecuentes ---------- */
.faq__item {
  padding-block: 1.25rem;
  border-top: 2px solid var(--border);
}

.faq__item h3 {
  margin-bottom: 0.5rem;
}

.faq__item p {
  margin: 0;
}

/* ---------- Tablas ---------- */
.table-wrap {
  overflow-x: auto;
  border: 2px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  min-width: 40rem;
  border-collapse: collapse;
  background: var(--surface);
}

caption {
  padding: 1rem;
  font-weight: 700;
  text-align: start;
  background: var(--bg-alt);
}

th,
td {
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--border);
  text-align: start;
  vertical-align: top;
}

thead th {
  background: var(--brand);
  color: var(--on-brand);
}

tbody th {
  font-weight: 700;
}

/* ---------- Código ---------- */
.code figcaption {
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.code pre {
  margin: 0;
  padding: 1.25rem;
  overflow-x: auto;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--code-bg);
  line-height: 1.5;
}

.code code {
  padding: 0;
  background: none;
  font-size: 0.95rem;
}

/* ---------- Notas y llamadas a la acción ---------- */
.note {
  max-width: 76ch;
  margin-bottom: 1.75em;
  padding: 1rem 1.25rem;
  border: 2px solid var(--brand);
  border-radius: var(--radius);
}

.note p {
  margin: 0;
}

.cta-box {
  max-width: 76rem;
  margin: clamp(2.5rem, 6vw, 4rem) auto;
  padding: clamp(1.5rem, 4vw, 3rem);
  width: calc(100% - 2 * clamp(1rem, 4vw, 2rem));
  border-radius: 1.5rem;
  background: var(--cta-bg);
  color: var(--cta-text);
}

.cta-box__text {
  font-size: clamp(1.25rem, 1.1rem + 0.6vw, 1.6rem);
  font-weight: 700;
}

.cta-box p:last-child {
  margin: 0;
}

.cta-box .button--accent {
  border-color: var(--accent);
}

.cta-box :focus-visible {
  outline-color: var(--accent);
  box-shadow: 0 0 0 6px var(--cta-bg);
}

/* ---------- Contacto y formulario ---------- */
.contact-card {
  font-style: normal;
}

.contact-form {
  max-width: 44rem;
}

.field {
  margin-bottom: 1.75rem;
}

.field label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 700;
}

.field__req {
  font-weight: 400;
  color: var(--muted);
}

.field__hint {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 1rem;
}

.field__error {
  margin: 0 0 0.5rem;
  color: var(--danger);
  font-weight: 700;
}

.field__error:empty,
.field__error:has(span:empty) {
  display: none;
}

.field__error span:not(:empty)::before {
  content: 'Error: ';
}

input:not([type='checkbox']),
select,
textarea {
  display: block;
  width: 100%;
  min-height: 48px;
  padding: 0.65rem 0.85rem;
  border: 2px solid var(--border);
  border-radius: 0.5rem;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

textarea {
  resize: vertical;
}

[aria-invalid='true'] {
  border-color: var(--danger) !important;
  border-width: 3px !important;
}

.field--check {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 0.85rem;
  align-items: start;
}

.field--check .field__error {
  grid-column: 1 / -1;
}

.field--check input {
  width: 28px;
  height: 28px;
  margin: 0.5rem 0 0 0.5rem;
  accent-color: var(--brand);
}

.field--check label {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 0.35em;
  min-height: 44px;
  font-weight: 400;
}

.error-summary {
  margin-bottom: 2rem;
  padding: 1.25rem 1.5rem;
  border: 4px solid var(--danger);
  border-radius: var(--radius);
}

.error-summary h3 {
  color: var(--danger);
}

.error-summary ul {
  margin: 0;
}

.error-summary a {
  color: var(--danger);
  font-weight: 700;
}

.hp {
  display: none !important;
}

/* ---------- Glosario ---------- */
.glossary__item {
  padding-block: 1.25rem;
  border-top: 2px solid var(--border);
}

.glossary dt {
  font-size: 1.25rem;
}

.glossary dfn {
  font-style: normal;
  font-weight: 800;
}

.glossary__expansion {
  display: block;
  font-size: 1rem;
  color: var(--muted);
}

.glossary dd {
  margin: 0.5rem 0 0;
}

/* ---------- Pie ---------- */
.updated {
  margin-block: 2rem;
  color: var(--muted);
  font-size: 1rem;
}

.site-footer {
  padding-block: 3rem 1.5rem;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
}

.site-footer h2 {
  font-size: 1.25rem;
}

.site-footer__grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
}

.site-footer address {
  margin-bottom: 1.5rem;
  font-style: normal;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer li + li {
  margin-top: 0;
}

.site-footer nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

/* Botón «Configurar cookies» del pie: se muestra solo con JavaScript. */
.cookie-settings {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--brand);
  font: inherit;
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
  cursor: pointer;
}

.cookie-settings:hover {
  text-decoration-thickness: 0.18em;
}

.cookie-settings[hidden] {
  display: none;
}

.site-footer__legal {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 1rem;
  color: var(--muted);
}

/* ---------- Movimiento, colores forzados e impresión ---------- */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

@media (forced-colors: active) {
  .button,
  .icon-button,
  .card,
  .summary,
  .cta-box {
    border: 2px solid CanvasText;
  }
  :focus-visible,
  .card:focus-within {
    outline: 3px solid Highlight;
  }
}

@media print {
  .site-header__tools,
  .skip-link,
  .breadcrumb,
  .hero__ctas,
  .cta-box,
  .contact-form {
    display: none !important;
  }
  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }
  a[href^='http']::after {
    content: ' (' attr(href) ')';
  }
}