:root {
  --fondo: #11130e;
  --superficie: #181c16;
  --texto: #eff0ef;
  --suave: #a8b5a8;
  --acento: #c7c988;
  --borde: #415d46;
  --error: #df706b;
  --ok: #8cb494;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--fondo); color: var(--texto); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--acento); }
h1 { font-size: clamp(1.9rem, 5vw, 2.8rem); line-height: 1.15; margin: 0 0 16px; }
h2 { font-size: 1.3rem; margin: 0 0 8px; }
p { margin: 0 0 16px; color: var(--suave); }
.contenedor { max-width: 720px; margin: 0 auto; padding: 0 16px; }
.barra { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px; max-width: 960px; margin: 0 auto; }
.marca { font-weight: 800; font-size: 1.2rem; color: var(--texto); text-decoration: none; }
.caja { background: var(--superficie); border: 1px solid var(--borde); border-radius: 14px; padding: 20px; margin-bottom: 16px; }
label { display: block; font-weight: 600; margin-bottom: 8px; }
input[type=text], input[type=email] { width: 100%; background: var(--fondo); color: var(--texto); border: 1px solid var(--borde); border-radius: 8px; padding: 12px; font: inherit; }
input[type=text]:focus, input[type=email]:focus { outline: 2px solid var(--acento); }
input[type=file] { width: 100%; color: var(--suave); }
.btn { display: inline-block; background: var(--acento); color: #11130e; border: 0; border-radius: 8px; padding: 12px 20px; font: inherit; font-weight: 700; cursor: pointer; text-decoration: none; margin-top: 12px; }
.btn:disabled { opacity: .5; cursor: wait; }
.btn.sec { background: transparent; color: var(--texto); border: 1px solid var(--borde); }
.btn.peligro { color: var(--error); border-color: var(--error); }
.error { color: var(--error); margin-top: 12px; }
.ok { color: var(--ok); margin-top: 12px; }
.aviso { color: var(--suave); font-size: .9rem; margin: 8px 0 0; }
.codigo-grande { font-size: 2.2rem; letter-spacing: .2em; font-weight: 800; color: var(--acento); margin: 4px 0 12px; }
.enlace { word-break: break-all; background: var(--fondo); border-radius: 8px; padding: 10px 12px; margin: 8px 0; font-family: ui-monospace, Menlo, monospace; font-size: .9rem; }
.qr { width: 200px; max-width: 100%; margin: 12px 0; border-radius: 8px; overflow: hidden; }
.qr svg { display: block; width: 100%; height: auto; }
[hidden] { display: none !important; }