:root {
  --color-texto: #1b1b1b;
  --color-fondo: #ffffff;
  --color-acento: #0b5fff;
  --color-borde: #e2e2e2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--color-texto);
  background: var(--color-fondo);
  line-height: 1.55;
}

.cabecera {
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-borde);
}

.marca {
  font-weight: 700;
  text-decoration: none;
  color: var(--color-texto);
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.hero h1 { font-size: 1.6rem; margin-bottom: 12px; }
.bajada { color: #444; }

.gratis, .oferta, .disclaimer, .retorno, .guia {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-borde);
}

.oferta h2 { color: var(--color-acento); }

.form-compra {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 8px;
}

.form-compra input[type="email"] {
  flex: 1 1 240px;
  padding: 10px 12px;
  border: 1px solid var(--color-borde);
  border-radius: 6px;
  font-size: 1rem;
}

.form-compra button, .boton {
  background: var(--color-acento);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

.metodo-pago { font-size: 0.85rem; color: #666; }

.disclaimer, .disclaimer-top, .disclaimer-bottom {
  font-size: 0.85rem;
  color: #555;
  background: #f6f6f6;
  padding: 14px;
  border-radius: 8px;
}

.avisos {
  background: #fff3cd;
  border: 1px solid #ffe69c;
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 16px;
}

.guia h2 { margin-top: 28px; }
.guia code { background: #f0f0f0; padding: 2px 6px; border-radius: 4px; }

.pie {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px;
  font-size: 0.8rem;
  color: #777;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-texto: #eaeaea;
    --color-fondo: #121212;
    --color-borde: #333;
  }
  .disclaimer, .disclaimer-top, .disclaimer-bottom { background: #1e1e1e; color: #ccc; }
  .avisos { background: #3a2f0f; border-color: #5a4a1a; color: #ffe69c; }
  .guia code { background: #262626; }
}