:root {
  --tinta: #1d2b3a;
  --suave: #51606e;
  --borde: #d8e1e8;
  --fondo: #f6f9fb;
  --marca: #0f2a44;
  --acento: #1aa39a;
  --oro: #ffd166;
  --error: #b42318;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Segoe UI", system-ui, -apple-system, Arial, sans-serif; color: var(--tinta); background: #fff; line-height: 1.55; }
a { color: var(--marca); }
.envoltura { max-width: 960px; margin: 0 auto; padding: 0 16px; }
header.barra { background: var(--marca); color: #fff; }
header.barra .envoltura { display: flex; justify-content: space-between; align-items: center; min-height: 56px; }
header.barra a { color: #fff; text-decoration: none; font-weight: 600; letter-spacing: .5px; }
.heroe { background: linear-gradient(160deg, #0f2a44 0%, #12406b 55%, #1aa39a 100%); color: #fff; padding: 40px 0; }
.heroe .envoltura { display: grid; gap: 28px; grid-template-columns: 1fr; align-items: center; }
.heroe h1 { font-family: Georgia, "Times New Roman", serif; font-size: clamp(30px, 6vw, 46px); line-height: 1.08; margin: 0 0 12px; }
.heroe h1 span { color: var(--oro); }
.heroe p { font-size: 18px; margin: 0 0 16px; opacity: .95; }
.heroe img { width: 100%; max-width: 380px; border-radius: 10px; box-shadow: 0 12px 30px rgba(0,0,0,.25); justify-self: center; }
.lista-ok { list-style: none; padding: 0; margin: 0 0 8px; }
.lista-ok li { padding: 4px 0; }
.precio { font-size: 22px; font-weight: 700; }
.precio small { display: block; font-size: 14px; font-weight: 400; opacity: .9; }
section { padding: 32px 0; }
section.gris { background: var(--fondo); }
h2 { font-family: Georgia, serif; color: var(--marca); font-size: 26px; margin: 0 0 12px; }
.muestras { display: grid; gap: 16px; grid-template-columns: 1fr; }
.muestras img { width: 100%; border: 1px solid var(--borde); border-radius: 8px; }
.compra { max-width: 480px; background: #fff; border: 1px solid var(--borde); border-radius: 12px; padding: 20px; }
.compra label { display: block; font-weight: 600; margin-bottom: 6px; }
.compra input { width: 100%; font-size: 17px; padding: 12px; border: 1px solid #b6c3ce; border-radius: 8px; }
.compra .nota { color: var(--suave); font-size: 14px; margin: 6px 0 16px; }
.mensaje { margin-top: 12px; font-size: 15px; }
.mensaje.error { color: var(--error); }
.boton { display: inline-block; background: var(--acento); color: #fff; text-decoration: none; font-weight: 700; padding: 14px 22px; border-radius: 8px; font-size: 17px; }
details { border: 1px solid var(--borde); border-radius: 8px; padding: 12px 14px; margin-bottom: 10px; background: #fff; }
summary { font-weight: 600; cursor: pointer; }
footer { color: var(--suave); font-size: 14px; padding: 24px 0 40px; border-top: 1px solid var(--borde); }
footer a { margin-right: 14px; }
.legal h1 { font-family: Georgia, serif; color: var(--marca); }
@media (min-width: 760px) {
  .heroe .envoltura { grid-template-columns: 1.2fr 1fr; }
  .muestras { grid-template-columns: 1fr 1fr; }
}