:root { color-scheme: light dark; --fondo: #fff; --texto: #1b1f24; --suave: #5b6470; --acento: #0a7cff; }
@media (prefers-color-scheme: dark) { :root { --fondo: #0d1117; --texto: #e6edf3; --suave: #9aa4b0; --acento: #4ea1ff; } }
body { margin: 0; background: var(--fondo); color: var(--texto); font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 32px 20px 48px; }
h1 { margin: 0 0 4px; font-size: 1.9rem; }
h2 { font-size: 1.15rem; margin-top: 28px; }
.sub, .pie { color: var(--suave); }
.pie { font-size: .9rem; margin-top: 32px; }
a { color: var(--acento); }
code { font-size: .92em; }
hr { border: 0; border-top: 1px solid var(--suave); opacity: .3; margin: 40px 0; }

/* --- Portada -------------------------------------------------------------- */
.ancho { max-width: 980px; }
.cabecera { background: linear-gradient(135deg, #0868F7, #00C6FF); color: #fff; }
.cabecera .dentro { max-width: 980px; margin: 0 auto; padding: 48px 20px 56px; display: flex; gap: 34px; align-items: center; flex-wrap: wrap; }
.cabecera img.icono { width: 116px; height: 116px; border-radius: 26px; box-shadow: 0 12px 30px rgba(0,0,0,.28); }
.cabecera h1 { font-size: 2.6rem; font-style: italic; font-weight: 800; margin: 0; letter-spacing: -.5px; }
.cabecera h1 span { color: #CDEBFF; }
.cabecera p { margin: 8px 0 0; font-size: 1.15rem; color: #E8F4FF; max-width: 30em; }
.botones { margin-top: 20px; display: flex; gap: 12px; flex-wrap: wrap; }
.boton { display: inline-block; padding: 13px 22px; border-radius: 999px; background: #10233C; color: #fff !important; text-decoration: none; font-weight: 700; }
.boton.claro { background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.5); }
.rejilla { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-top: 18px; }
.tarjeta { border: 1px solid rgba(128,128,128,.25); border-radius: 16px; padding: 18px 18px 20px; }
.tarjeta h3 { margin: 10px 0 6px; font-size: 1.05rem; }
.tarjeta p { margin: 0; color: var(--suave); font-size: .97rem; }
.pasos { counter-reset: paso; padding-left: 0; list-style: none; }
.pasos li { counter-increment: paso; position: relative; padding: 0 0 14px 44px; }
.pasos li::before { content: counter(paso); position: absolute; left: 0; top: -2px; width: 30px; height: 30px; border-radius: 50%;
  background: #0868F7; color: #fff; font-weight: 700; display: grid; place-items: center; }
.aviso { border-left: 4px solid #FFC107; padding: 10px 0 10px 14px; color: var(--suave); }
/* Selector de idioma: pastilla en la esquina de la cabecera */
.cabecera { position: relative; }
.idiomas { position: absolute; top: 18px; right: 20px; display: inline-flex; padding: 3px;
  background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.4); border-radius: 999px; backdrop-filter: blur(4px); }
.idiomas a { display: block; padding: 6px 14px; border-radius: 999px; font-size: .84rem; font-weight: 700;
  letter-spacing: .04em; color: #fff !important; text-decoration: none; opacity: .85; }
.idiomas a:hover { opacity: 1; }
.idiomas a.activo { background: #fff; color: #0868F7 !important; opacity: 1; }
@media (max-width: 640px) { .idiomas { top: 12px; right: 12px; } .cabecera .dentro { padding-top: 62px; } }
.muestra { display: flex; justify-content: center; margin: 26px 0 8px; }
.burbuja { display: inline-flex; align-items: center; gap: 14px; background: rgba(16,28,46,.95); border: 3px solid #fff;
  border-radius: 999px; padding: 14px 20px; color: #fff; box-shadow: 0 14px 34px rgba(0,0,0,.3); }
.burbuja .vel { font-size: 2.6rem; font-weight: 800; line-height: 1; }
.burbuja .u { font-size: .8rem; color: #B9C6D6; }
.burbuja .lim { width: 58px; height: 58px; border-radius: 50%; background: #fff; border: 7px solid #FF3045; box-sizing: border-box;
  display: grid; place-items: center; color: #10233C; font-weight: 800; font-size: 1.35rem; }