:root {
  --fondo: #0f1217; --panel: #171c24; --panel2: #1e2530; --borde: #2a3340; --texto: #e8ecf1; --suave: #98a4b3;
  --ambar: #e4a23c; --verde: #34d399; --rojo: #f87171;
}
* { box-sizing: border-box; }
html { color-scheme: dark; }
body { margin: 0; background: var(--fondo); color: var(--texto); font: 16px/1.5 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; }
a { color: var(--ambar); }
h1, h2, h3 { margin: 0 0 8px; line-height: 1.2; }
h1 { font-size: 28px; } h2 { font-size: 20px; } h3 { font-size: 17px; }
p { margin: 0 0 12px; color: var(--suave); }
.oculto { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.barra { display: flex; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--borde); background: var(--panel); position: sticky; top: 0; z-index: 5; }
.marca { display: flex; align-items: center; gap: 12px; }
.marca b { display: block; letter-spacing: .08em; }
.marca small { color: var(--suave); }
.logo { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 8px; background: var(--ambar); color: #1a1300; font-weight: 800; font-size: 22px; }

main { max-width: 1040px; margin: 0 auto; padding: 24px 16px 40px; }
.presenta { margin-bottom: 20px; }
.nota-suave { font-size: 14px; }
.aviso { margin: 14px 0; padding: 12px 14px; border: 1px solid var(--ambar); border-radius: 8px; color: var(--ambar); background: rgba(228, 162, 60, .08); }
.aviso.error { border-color: var(--rojo); color: var(--rojo); background: rgba(248, 113, 113, .08); }

.rejilla { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.catalogo { display: flex; gap: 14px; padding: 16px; min-height: 44px; border: 1px solid var(--borde); border-radius: 12px; background: var(--panel); color: var(--texto); font: inherit; text-align: left; cursor: pointer; transition: border-color .15s, transform .15s; }
.catalogo:hover:not(:disabled), .catalogo:focus-visible { border-color: var(--ambar); transform: translateY(-2px); outline: none; }
.catalogo:focus-visible { box-shadow: 0 0 0 3px rgba(228, 162, 60, .4); }
.catalogo:disabled { opacity: .55; cursor: not-allowed; }
.icono { flex: none; display: grid; place-items: center; width: 56px; height: 56px; border-radius: 12px; background: var(--panel2); color: var(--ambar); font-size: 28px; }
.cuerpo { display: flex; flex-direction: column; gap: 4px; }
.cuerpo b { font-size: 18px; }
.texto { color: var(--suave); font-size: 14px; }
.pronto { font-size: 13px; color: var(--ambar); }

.doble { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px; margin-top: 14px; }
.tarjeta { padding: 16px; border: 1px solid var(--borde); border-radius: 12px; background: var(--panel); }
.destacada { margin-bottom: 24px; border-color: var(--ambar); }
.tu-demo-cuerpo { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; }
.tu-demo-cuerpo > div { flex: 1 1 300px; }
.datos { margin: 14px 0; padding-left: 20px; color: var(--suave); }
.datos li { margin-bottom: 6px; }
.datos b { color: var(--texto); }
.qr { width: 160px; padding: 8px; border-radius: 8px; background: #fff; }
.qr svg { display: block; width: 100%; height: auto; }
.codigo { margin: 10px 0 0; font: 700 28px/1 ui-monospace, 'Cascadia Mono', Consolas, monospace; letter-spacing: .18em; color: var(--texto); }

.lista-xml { margin: 0; padding: 0; list-style: none; }
.lista-xml li { display: flex; flex-direction: column; padding: 8px 0; border-top: 1px solid var(--borde); }
.lista-xml a { font-weight: 600; word-break: break-all; }
.lista-xml small { color: var(--suave); }

.unirse { display: flex; flex-wrap: wrap; gap: 8px; }
.unirse input { flex: 1 1 180px; min-height: 44px; padding: 10px 12px; border: 1px solid var(--borde); border-radius: 8px; background: var(--fondo); color: var(--texto); font: 600 18px ui-monospace, Consolas, monospace; letter-spacing: .12em; text-transform: uppercase; }
.unirse input:focus-visible { outline: 3px solid rgba(228, 162, 60, .5); outline-offset: 1px; }

.btn { display: inline-block; min-height: 44px; padding: 10px 18px; border: 1px solid var(--borde); border-radius: 8px; background: var(--panel2); color: var(--texto); font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.btn:hover { border-color: var(--ambar); }
.btn:focus-visible { outline: 3px solid rgba(228, 162, 60, .5); outline-offset: 2px; }
.btn-ambar { background: var(--ambar); border-color: var(--ambar); color: #1a1300; }
.pie { margin-top: 32px; padding-top: 16px; border-top: 1px solid var(--borde); font-size: 13px; color: var(--suave); }
.preparando { opacity: .6; pointer-events: none; }

@media (max-width: 600px) {
  h1 { font-size: 24px; }
  .rejilla { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { .catalogo { transition: none; } }