:root {
  --sv-primary: #4338CA;
  --sv-primary-ink: #FFFFFF;
  --sv-primary-soft: #EEF2FF;
  --sv-link: #4338CA;
  --sv-accent: #16A34A;
  --sv-accent-strong: #15803D;
  --sv-accent-ink: #FFFFFF;
  --sv-bg: #F8FAFC;
  --sv-surface: #FFFFFF;
  --sv-text: #0F172A;
  --sv-muted: #475569;
  --sv-border: #E2E8F0;
  --sv-border-strong: #94A3B8;
  --sv-danger: #B91C1C;
  --sv-danger-soft: #FEF2F2;
  --sv-warning: #92400E;
  --sv-warning-soft: #FFFBEB;
  --sv-success-soft: #F0FDF4;
  --sv-focus: #4338CA;
  --sv-radius: 12px;
  --sv-shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 4px 16px rgba(15, 23, 42, .06);
  --sv-font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --sv-mono: ui-monospace, SFMono-Regular, Consolas, monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --sv-primary: #4F46E5;
    --sv-primary-ink: #FFFFFF;
    --sv-primary-soft: #1E1B4B;
    --sv-link: #A5B4FC;
    --sv-accent-strong: #15803D;
    --sv-bg: #0B1120;
    --sv-surface: #111827;
    --sv-text: #E2E8F0;
    --sv-muted: #94A3B8;
    --sv-border: #1F2937;
    --sv-border-strong: #475569;
    --sv-danger: #FCA5A5;
    --sv-danger-soft: #2A1215;
    --sv-warning: #FCD34D;
    --sv-warning-soft: #2A2110;
    --sv-success-soft: #0F2A1A;
    --sv-focus: #A5B4FC;
    --sv-shadow: 0 1px 2px rgba(0, 0, 0, .4);
  }
}

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

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

body {
  margin: 0;
  font-family: var(--sv-font);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--sv-text);
  background: var(--sv-bg);
}

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

a { color: var(--sv-link); text-underline-offset: 2px; }

:focus-visible {
  outline: 3px solid var(--sv-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

.saltar {
  position: absolute;
  left: 8px;
  top: -48px;
  padding: 8px 12px;
  background: var(--sv-surface);
  color: var(--sv-text);
  border-radius: var(--sv-radius);
  z-index: 10;
}

.saltar:focus { top: 8px; }

.solo-lectores {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.contenedor {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 16px;
}

.cabecera {
  background: var(--sv-surface);
  border-bottom: 1px solid var(--sv-border);
}

.cabecera .contenedor {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 4px 12px;
  min-height: 56px;
  padding-top: 8px;
  padding-bottom: 8px;
}

.marca {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--sv-text);
  text-decoration: none;
  white-space: nowrap;
}

.marca span { color: var(--sv-muted); font-weight: 500; }

.nav {
  display: flex;
  gap: 4px;
  margin-left: -10px;
}

@media (min-width: 480px) {
  .nav { margin-left: 0; }
}

.nav a {
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--sv-text);
  text-decoration: none;
  font-size: .9rem;
  white-space: nowrap;
}

.nav a[aria-current="page"] { background: var(--sv-primary-soft); color: var(--sv-link); font-weight: 600; }

main { padding: 24px 0 40px; }

h1 { font-size: 1.6rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 32px 0 12px; }
h3 { font-size: 1.05rem; margin: 20px 0 8px; }

.bajada { color: var(--sv-muted); margin: 0 0 20px; max-width: 60ch; }

.tarjeta {
  background: var(--sv-surface);
  border: 1px solid var(--sv-border);
  border-radius: var(--sv-radius);
  padding: 16px;
  box-shadow: var(--sv-shadow);
}

.rejilla-herramientas {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
  padding: 0;
  margin: 0;
  list-style: none;
}

.herramienta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  height: 100%;
  color: var(--sv-text);
  text-decoration: none;
}

.herramienta:hover { border-color: var(--sv-primary); }

.herramienta h2 { margin: 0; font-size: 1.15rem; color: var(--sv-link); }

.herramienta p { margin: 0; color: var(--sv-muted); }

.icono-herramienta {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--sv-primary-soft);
  color: var(--sv-link);
}

.icono-herramienta.whatsapp { background: var(--sv-success-soft); color: var(--sv-accent); }

.herramienta-proxima { box-shadow: none; border-style: dashed; }
.herramienta-proxima h2 { color: var(--sv-text); }

.etiqueta {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--sv-primary-soft);
  color: var(--sv-link);
  width: fit-content;
}

.disposicion-herramienta {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
  align-items: start;
}

.campo { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }

.campo label, .campo legend, .etiqueta-campo { font-weight: 600; font-size: .95rem; }

.ayuda { font-size: .85rem; color: var(--sv-muted); margin: 0; }

input[type="text"], input[type="tel"], input[type="url"], input[type="email"], input[type="password"], select, textarea {
  width: 100%;
  font: inherit;
  color: var(--sv-text);
  background: var(--sv-surface);
  border: 1px solid var(--sv-border-strong);
  border-radius: 10px;
  padding: 10px 12px;
  min-height: 44px;
}

textarea { min-height: 96px; resize: vertical; }

input[aria-invalid="true"] { border-color: var(--sv-danger); }

input[type="color"] {
  width: 56px;
  height: 44px;
  padding: 2px;
  border: 1px solid var(--sv-border-strong);
  border-radius: 10px;
  background: var(--sv-surface);
  cursor: pointer;
}

input[type="range"] { width: 100%; accent-color: var(--sv-primary); }

input[type="checkbox"] { width: 20px; height: 20px; accent-color: var(--sv-primary); }

.fila { display: flex; flex-wrap: wrap; gap: 0 10px; align-items: flex-end; }
.fila > .campo { flex: 1 1 150px; min-width: 0; }
.fila > .crece { flex: 2 1 180px; }
.fila-envuelve { display: flex; flex-wrap: wrap; gap: 12px; }

.casilla { display: flex; gap: 8px; align-items: center; font-weight: 500; }

fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }

.boton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 16px;
  font: inherit;
  font-weight: 600;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  background: var(--sv-primary);
  color: var(--sv-primary-ink);
}

.boton:hover { filter: brightness(1.08); }

.boton-whatsapp { background: var(--sv-accent-strong); color: var(--sv-accent-ink); }

.boton-secundario {
  background: var(--sv-surface);
  color: var(--sv-text);
  border-color: var(--sv-border-strong);
}

.boton[disabled], .boton[aria-disabled="true"] { opacity: .5; cursor: not-allowed; pointer-events: none; }

.acciones { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.acciones .boton { flex: 1 1 auto; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  font: inherit;
  font-size: .9rem;
  min-height: 40px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--sv-border-strong);
  background: var(--sv-surface);
  color: var(--sv-text);
  cursor: pointer;
}

.chip:hover { border-color: var(--sv-primary); }

.chip[aria-pressed="true"], .chip[aria-checked="true"] {
  background: var(--sv-primary);
  border-color: var(--sv-primary);
  color: var(--sv-primary-ink);
}

.resultado-link {
  font-family: var(--sv-mono);
  font-size: .9rem;
  word-break: break-all;
  background: var(--sv-bg);
  border: 1px dashed var(--sv-border-strong);
  border-radius: 10px;
  padding: 12px;
  margin: 0;
  min-height: 48px;
}

.mensaje { border-radius: 10px; padding: 10px 12px; margin: 10px 0 0; font-size: .92rem; }
.mensaje:empty { display: none; }
.mensaje-error { background: var(--sv-danger-soft); color: var(--sv-danger); }
.mensaje-aviso { background: var(--sv-warning-soft); color: var(--sv-warning); }
.mensaje-exito { background: var(--sv-success-soft); color: var(--sv-text); }

.vista-previa {
  display: grid;
  place-items: center;
  background: var(--sv-bg);
  border-radius: 10px;
  padding: 16px;
  min-height: 240px;
}

.vista-previa canvas {
  width: 100%;
  max-width: 280px;
  height: auto;
  image-rendering: pixelated;
  border-radius: 4px;
}

.vista-previa .vacio { color: var(--sv-muted); text-align: center; margin: 0; }

.lienzo-plantilla { max-width: 240px !important; box-shadow: var(--sv-shadow); }

.tipos-qr { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 16px; }
.tipos-qr .chip {
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6px 4px;
}

.tipos-qr .chip:has(input:checked) {
  background: var(--sv-primary);
  border-color: var(--sv-primary);
  color: var(--sv-primary-ink);
  font-weight: 600;
}

.tipos-qr .chip:has(input:focus-visible) {
  outline: 3px solid var(--sv-focus);
  outline-offset: 2px;
}

.fila-envuelve > .crece { flex: 1 1 160px; min-width: 0; }

details.opciones { border-top: 1px solid var(--sv-border); padding-top: 12px; margin-top: 4px; }
details.opciones summary { cursor: pointer; font-weight: 600; min-height: 32px; }

.contenido-texto { max-width: 70ch; }
.contenido-texto li { margin-bottom: 6px; }

.preguntas details {
  border: 1px solid var(--sv-border);
  border-radius: 10px;
  background: var(--sv-surface);
  padding: 12px 14px;
  margin-bottom: 8px;
}

.preguntas summary { cursor: pointer; font-weight: 600; }
.preguntas details p { margin: 8px 0 0; color: var(--sv-text); }

.cta {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
  margin-top: 32px;
}

.cta a {
  display: block;
  padding: 16px;
  border-radius: var(--sv-radius);
  background: var(--sv-primary-soft);
  color: var(--sv-text);
  text-decoration: none;
  border: 1px solid var(--sv-border);
}

.cta a strong { display: block; color: var(--sv-link); margin-bottom: 4px; }
.cta a:hover { border-color: var(--sv-primary); }

.pie {
  border-top: 1px solid var(--sv-border);
  background: var(--sv-surface);
  padding: 20px 0 28px;
  color: var(--sv-muted);
  font-size: .9rem;
}

.pie p { margin: 4px 0; }

@media (min-width: 640px) {
  h1 { font-size: 2rem; }
  .rejilla-herramientas { grid-template-columns: repeat(2, 1fr); }
  .cta { grid-template-columns: repeat(2, 1fr); }
  .tipos-qr { grid-template-columns: repeat(6, 1fr); }
}

@media (min-width: 900px) {
  .disposicion-herramienta { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); }
  .panel-resultado { position: sticky; top: 16px; }
  .rejilla-herramientas { grid-template-columns: repeat(3, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}

.separado { margin-top: 14px; }
.sin-margen { margin-top: 0; }