/* ============================================================================
   Andén — landing. Sistema de componentes derivado de DESIGN.md.
   Mobile-first (390px) → max-width 1280. Grid, no matemática de flex.
   ========================================================================== */

/* ---------- Reset mínimo ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--papel);
  color: var(--tinta);
  font-family: var(--font-display);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}
img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
a { color: var(--arcilla); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3, h4, p, ul, ol, figure, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
strong { font-weight: 600; }
:focus-visible { outline: 2px solid var(--arcilla); outline-offset: 3px; border-radius: 6px; }
.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;
}
.salto { position: absolute; left: 8px; top: -60px; z-index: 100; background: var(--tinta); color: var(--papel); padding: 10px 14px; border-radius: 10px; }
.salto:focus { top: 8px; }

/* ---------- Tipografía ---------- */
.h1 {
  font-size: var(--fs-h1);
  font-weight: 700;
  letter-spacing: var(--tracking-display);
  line-height: 1.08;
  text-wrap: balance;
}
.h2 {
  font-size: var(--fs-h2);
  font-weight: 700;
  letter-spacing: var(--tracking-display);
  line-height: 1.15;
  text-wrap: balance;
  max-width: 24ch;
}
.h3 { font-size: var(--fs-h3); font-weight: 600; letter-spacing: -0.01em; line-height: 1.3; }
.lead { font-size: 1.125rem; color: var(--piedra-texto); max-width: var(--medida); }
.parrafo { color: var(--texto-2); max-width: var(--medida); }
.mono { font-family: var(--font-mono); font-weight: 500; font-variant-numeric: tabular-nums; }
.pequeno { font-size: var(--fs-small); color: var(--piedra-texto); }
.tinta { color: var(--tinta); }

/* ---------- Layout ---------- */
.contenedor {
  width: min(100% - 2 * var(--gutter), var(--max));
  margin-inline: auto;
}
.seccion { padding-block: var(--seccion); }
/* Los hijos de grid/contenedor no deben expandirse por contenido ancho
   (tablas con min-width): min-width:0 para que overflow-x:auto recorte. */
.contenedor, .contenedor > *, .grid-2 > *, .grid-hero > *, .grid-asim > *,
details, .comparativa__tabla, .tecnica__tabla { min-width: 0; max-width: 100%; }
.seccion--ajustada { padding-block: var(--bloque); }
.seccion + .seccion { padding-top: 0; }
.encabezado-seccion { display: grid; gap: 14px; margin-bottom: var(--bloque); }
.encabezado-seccion .lead { margin-top: 2px; }

/* Grids nombrados (nunca "3 tarjetas iguales") */
.grid-2 { display: grid; gap: 20px; }
.grid-hero { display: grid; gap: 40px; align-items: center; }
.grid-asim { display: grid; gap: 20px; }
@media (min-width: 720px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 960px) {
  .grid-hero { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 56px; }
  .grid-asim { grid-template-columns: 2fr 1fr; }
}

/* ---------- Botones (DESIGN.md §4) ---------- */
.boton {
  --bg: var(--arcilla);
  --fg: var(--blanco-calido);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: var(--h-boton);
  padding: 0 22px;
  border-radius: var(--r-boton);
  background: var(--bg);
  color: var(--fg);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: transform var(--t-press) var(--ease-out), background-color var(--t-press) linear, filter var(--t-press) linear;
  text-decoration: none;
}
.boton:hover { text-decoration: none; filter: brightness(0.96); }
.boton:active, .boton.presionado { transform: translateY(1px) scale(0.985); filter: brightness(0.92); }
.boton--secundario { --bg: transparent; --fg: var(--tinta); border-color: var(--borde); }
.boton--secundario:hover { background: var(--superficie); filter: none; }
.boton--noche { --bg: var(--tinta); --fg: var(--papel); }
.boton--peligro { --bg: transparent; --fg: var(--ladrillo); }
.boton--compacto { min-height: 44px; padding: 0 16px; font-size: 0.9375rem; }
.boton .icono { width: 20px; height: 20px; }

/* ---------- Íconos (sprite Material Symbols, mismos que la app) ---------- */
.icono { width: 24px; height: 24px; fill: currentColor; flex: none; }
.icono--caja {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--arcilla-suave); color: var(--arcilla);
  display: grid; place-items: center;
}
.icono--caja .icono { width: 24px; height: 24px; }

/* ---------- Tarjetas ---------- */
.tarjeta {
  background: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: var(--r-tarjeta);
  box-shadow: var(--sombra-tarjeta);
}
.tarjeta--plana { box-shadow: none; }
.tarjeta--noche { background: var(--noche); color: var(--papel); border-color: transparent; }
.tarjeta--suave { background: var(--arcilla-suave); border-color: transparent; box-shadow: none; }
.tarjeta-pulsable { transition: transform var(--t-press) var(--ease-out); }
.tarjeta-pulsable:active, .tarjeta-pulsable.presionado { transform: scale(0.985); }

/* ---------- Chips de estado ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 11px; border-radius: var(--r-chip);
  font-size: 0.8125rem; font-weight: 600; line-height: 1.2;
  --c: var(--piedra);
  color: color-mix(in srgb, var(--c) 80%, var(--tinta));
  background: color-mix(in srgb, var(--c) 12%, transparent);
}
.chip--ok { --c: var(--musgo); }
.chip--pendiente { --c: var(--ambar); }
.chip--error { --c: var(--ladrillo); }
.chip--arcilla { --c: var(--arcilla); }

/* ---------- Listas con divisores (listas densas, no tarjetas) ---------- */
.lista-divisores > * + * { border-top: 1px solid var(--borde); }
.lista-divisores > * { padding-block: 16px; }
.lista-divisores > :first-child { padding-top: 0; }
.lista-divisores > :last-child { padding-bottom: 0; }

/* ---------- Inputs ---------- */
.campo { display: grid; gap: 6px; }
.campo label { font-size: var(--fs-label); font-weight: 600; color: var(--piedra-texto); }
.campo input, .campo select, .campo textarea {
  width: 100%;
  min-height: 52px;
  padding: 12px 16px;
  border: 1px solid var(--borde);
  border-radius: var(--r-input);
  background: var(--superficie);
  color: var(--tinta);
  transition: border-color var(--t-press) linear, box-shadow var(--t-press) linear;
}
.campo textarea { min-height: 120px; resize: vertical; }
.campo input::placeholder, .campo textarea::placeholder { color: var(--piedra); opacity: 0.9; }
.campo input:focus, .campo select:focus, .campo textarea:focus {
  outline: none; border-color: var(--arcilla); box-shadow: var(--ring);
}
.campo [aria-invalid="true"] { border-color: var(--ladrillo); }
.campo .error { font-size: var(--fs-small); color: var(--ladrillo); }
.campo select {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 -960 960 960' width='20' height='20' fill='%2378716C'><path d='M480-345 240-585l43-43 197 198 197-197 43 43-240 239Z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 44px;
}

/* ---------- Skeleton (para estados de carga, nunca spinners) ---------- */
.skeleton {
  background: linear-gradient(90deg, var(--borde) 0%, var(--papel) 40%, var(--borde) 80%);
  background-size: 200% 100%;
  border-radius: 10px;
  animation: shimmer 1.6s linear infinite;
}
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }

/* ---------- Navegación ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--papel) 92%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
}
.nav.con-borde { border-bottom-color: var(--borde); }
.nav__fila {
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 16px;
  min-height: 68px;
}
.marca { display: inline-flex; align-items: center; gap: 10px; color: var(--tinta); font-weight: 700; font-size: 1.25rem; letter-spacing: -0.02em; }
.marca:hover { text-decoration: none; }
.marca svg { width: 44px; height: auto; }
.nav__enlaces { display: none; justify-content: center; gap: 4px; }
.nav__enlaces a {
  color: var(--tinta); font-weight: 500; padding: 10px 12px; border-radius: 10px;
  transition: background-color var(--t-press) linear;
}
.nav__enlaces a:hover { background: var(--arcilla-suave); text-decoration: none; }
.nav__enlaces a[aria-current="true"] { color: color-mix(in srgb, var(--arcilla) 80%, var(--tinta)); background: var(--arcilla-suave); }
.nav__acciones { display: flex; gap: 10px; align-items: center; justify-self: end; }
.nav__menu-boton { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; color: var(--tinta); }
.nav__menu-boton:hover { background: var(--arcilla-suave); }
.nav__panel { border-top: 1px solid var(--borde); padding: 8px 0 16px; }
.nav__panel a { display: block; padding: 14px 8px; font-weight: 500; color: var(--tinta); border-radius: 10px; }
.nav__panel a:hover { background: var(--arcilla-suave); text-decoration: none; }
@media (min-width: 1024px) {
  .nav__enlaces { display: flex; }
  .nav__menu-boton, .nav__panel { display: none !important; }
}

/* ---------- Marcos de dispositivo (capturas reales de la app) ---------- */
.telefono {
  --ancho: 300px;
  width: var(--ancho);
  max-width: 100%;
  border-radius: 38px;
  border: 1px solid var(--borde);
  background: var(--superficie);
  padding: 10px;
  box-shadow: 0 24px 60px rgba(28, 25, 23, 0.10), var(--sombra-tarjeta);
}
.telefono img { width: 100%; border-radius: 30px; aspect-ratio: 430 / 932; object-fit: cover; object-position: top; }
.telefono--chico { --ancho: 240px; }
.telefono--recortado img { aspect-ratio: 430 / 620; }
.pantalla {
  border-radius: 16px;
  border: 1px solid var(--borde);
  background: var(--superficie);
  padding: 8px;
  box-shadow: 0 24px 60px rgba(28, 25, 23, 0.10), var(--sombra-tarjeta);
}
.pantalla img { border-radius: 10px; width: 100%; aspect-ratio: 16 / 10; object-fit: cover; object-position: top left; }
.pantalla--recortada img { aspect-ratio: 16 / 7.5; }
.pie-figura { margin-top: 12px; font-size: var(--fs-small); color: var(--piedra-texto); }

/* ---------- Cascadas de entrada (DESIGN.md §6) ---------- */
.js [data-cascada] > * {
  opacity: 0;
  transform: translateY(8px);
}
.js [data-cascada].visto > * {
  opacity: 1;
  transform: none;
  transition:
    opacity 420ms var(--ease-out) calc(var(--i, 0) * var(--t-cascada)),
    transform 420ms var(--ease-out) calc(var(--i, 0) * var(--t-cascada));
}
.reduce-motion [data-cascada] > * { transform: none; }
.reduce-motion [data-cascada].visto > * { transition: opacity 200ms linear; }

/* ---------- Pulso del QR vigente (único micro-loop permitido) ---------- */
.pulso { animation: pulso 2s ease-in-out infinite; }
@keyframes pulso { 0%, 100% { opacity: 1; } 50% { opacity: 0.72; } }
.reduce-motion .pulso { animation: none; }

/* ---------- Tablas de planes ---------- */
.tabla-planes { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.tabla-planes th, .tabla-planes td { padding: 12px 10px; text-align: left; border-top: 1px solid var(--borde); vertical-align: top; }
.tabla-planes thead th { border-top: 0; color: var(--piedra-texto); font-weight: 600; font-size: var(--fs-label); text-transform: none; }
.tabla-planes td:not(:first-child), .tabla-planes th:not(:first-child) { text-align: center; }
.tabla-planes .si { color: var(--musgo); }
.tabla-planes .no { color: var(--borde); }
.tabla-planes .icono { width: 22px; height: 22px; margin-inline: auto; }

/* ---------- Detalles / FAQ ---------- */
.faq details { border-top: 1px solid var(--borde); }
.faq details:last-child { border-bottom: 1px solid var(--borde); }
.faq summary {
  list-style: none; cursor: pointer;
  display: grid; grid-template-columns: 1fr 24px; align-items: center; gap: 16px;
  padding: 18px 4px; font-weight: 600; font-size: 1.0625rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .icono { transition: transform var(--t-ui) var(--ease-spring); color: var(--piedra-texto); }
.faq details[open] summary .icono { transform: rotate(180deg); }
.faq .respuesta { padding: 0 4px 20px; color: var(--piedra-texto); max-width: var(--medida); }
.faq .respuesta p + p { margin-top: 10px; }

/* ---------- Pie ---------- */
.pie { background: var(--noche); color: var(--papel); }
.pie a { color: var(--papel); }
.pie .pequeno { color: color-mix(in srgb, var(--papel) 70%, transparent); }
.pie__grid { display: grid; gap: 32px; padding-block: 48px 32px; }
.pie__columna { display: grid; gap: 10px; align-content: start; }
.pie__columna h3 { font-size: var(--fs-small); font-weight: 600; letter-spacing: 0.02em; color: color-mix(in srgb, var(--papel) 70%, transparent); }
.pie__linea { border-top: 1px solid color-mix(in srgb, var(--papel) 14%, transparent); padding-block: 20px 28px; display: grid; gap: 10px; }
@media (min-width: 720px) {
  .pie__grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
  .pie__linea { grid-template-columns: 1fr auto; align-items: center; }
}

/* ---------- Utilidades ---------- */
.fila { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.apilado { display: grid; gap: 12px; }
.apilado--16 { gap: 16px; }
.apilado--24 { gap: 24px; }
.separador { border: 0; border-top: 1px solid var(--borde); margin: 0; }
.nota { display: grid; grid-template-columns: 24px 1fr; gap: 12px; align-items: start; color: var(--piedra-texto); font-size: var(--fs-small); }
.nota .icono { width: 22px; height: 22px; color: var(--ambar); }
.oculto-movil { display: none; }
@media (min-width: 720px) { .oculto-movil { display: revert; } }
.solo-movil { display: revert; }
@media (min-width: 720px) { .solo-movil { display: none; } }