:root {
  --brand: #0055ff;
  --brand-dark: #0040c4;
  --ink: #0d141a;
  --muted: #5b6672;
  --line: #e3e8ef;
  --bg: #f5f7fb;
  --card: #ffffff;
  --soft: #eaf1ff;
  --warn-bg: #fff7e6;
  --warn-line: #f5c46b;
  --radius: 14px;
}

* { box-sizing: border-box; }

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

a { color: var(--brand); }

.wrap { max-width: 920px; margin: 0 auto; padding: 0 16px; }

/* --- Barra superior --- */
.topbar { background: var(--card); border-bottom: 1px solid var(--line); }
.topbar .wrap { display: flex; align-items: center; gap: 12px; height: 64px; }
.topbar img { width: 40px; height: 40px; }
.topbar .brand { font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; }
.topbar .brand span { color: var(--muted); font-weight: 500; }
.topbar .back { margin-left: auto; font-size: 14px; text-decoration: none; }

/* --- Hero --- */
.hero { padding: 40px 0 8px; }
.hero h1 { font-size: clamp(26px, 5vw, 38px); line-height: 1.15; margin: 0 0 10px; }
.hero p { color: var(--muted); font-size: 17px; margin: 0; max-width: 640px; }

/* --- Tarjeta de descarga --- */
.download {
  margin: 28px 0 8px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}
.version-line { font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.version-line strong { color: var(--ink); font-size: 16px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--brand); color: #fff; text-decoration: none;
  font-weight: 700; font-size: 18px;
  padding: 16px 26px; border-radius: 12px;
}
.btn:hover { background: var(--brand-dark); }
.btn svg { width: 22px; height: 22px; }
.small { font-size: 13px; color: var(--muted); margin-top: 12px; }
.qr { text-align: center; font-size: 12px; color: var(--muted); }
.qr img { width: 150px; height: 150px; display: block; margin: 0 auto 6px; }

/* --- Pasos --- */
h2 { font-size: 22px; margin: 44px 0 16px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.step {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; display: grid; grid-template-columns: 44px 1fr; gap: 16px;
}
.step .num {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--soft); color: var(--brand);
  display: grid; place-items: center; font-weight: 800; font-size: 19px;
}
.step h3 { margin: 6px 0 6px; font-size: 18px; }
.step p { margin: 0 0 8px; }
.step ol, .step ul { margin: 6px 0 0; padding-left: 20px; }
.step li { margin: 4px 0; }

.fields { margin: 10px 0 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.fields div { display: grid; grid-template-columns: 170px 1fr; border-top: 1px solid var(--line); }
.fields div:first-child { border-top: 0; }
.fields dt, .fields dd { margin: 0; padding: 9px 12px; font-size: 15px; }
.fields dt { background: var(--bg); font-weight: 600; }
.fields code { font-size: 14px; }

.note {
  background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 10px;
  padding: 10px 14px; font-size: 14px; margin-top: 10px;
}

/* --- Novedades --- */
.changes { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; }
.changes h3 { margin: 0 0 6px; font-size: 16px; }
.changes ul { margin: 6px 0 0; padding-left: 20px; }
.changes p { margin: 6px 0 0; color: var(--muted); }

/* --- Portal (index) --- */
.products { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin: 28px 0; }
.product {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; text-decoration: none; color: inherit; display: block;
}
.product:hover { border-color: var(--brand); }
.product .icon {
  width: 48px; height: 48px; border-radius: 12px; background: var(--soft); color: var(--brand);
  display: grid; place-items: center; margin-bottom: 12px;
}
.product .icon svg { width: 26px; height: 26px; }
.product h3 { margin: 0 0 4px; font-size: 18px; }
.product p { margin: 0; color: var(--muted); font-size: 15px; }
.product .tag { display: inline-block; margin-top: 12px; font-size: 13px; font-weight: 600; color: var(--brand); }

footer { margin: 56px 0 0; padding: 22px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }

@media (max-width: 640px) {
  .download { grid-template-columns: 1fr; }
  .qr { display: none; }   /* en el celular no tiene sentido escanearse a sí mismo */
  .btn { width: 100%; justify-content: center; }
  .fields div { grid-template-columns: 1fr; }
  .fields dt { padding-bottom: 2px; }
}