:root {
  color-scheme: light dark;
  --fondo:#f6f4ef; --texto:#171717; --suave:#66625b;
  --borde:#b9b4aa; --boton:#171717; --boton-texto:#f6f4ef;
}
@media (prefers-color-scheme: dark) {
  :root { --fondo:#11110f; --texto:#f0eee8; --suave:#aaa59b;
          --borde:#555149; --boton:#f0eee8; --boton-texto:#11110f; }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--fondo);color:var(--texto);
  font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace}
.terminal{width:min(92%,760px);margin:0 auto;padding:clamp(3rem,10vw,8rem) 0 7rem}
.shebang{margin:0 0 4rem;color:var(--suave);font-size:clamp(.88rem,2.8vw,1rem)}
h1{margin:0 0 1.4rem;font-size:clamp(1.45rem,5vw,2.25rem);line-height:1.3;font-weight:500}
.nota{margin:0 0 2.25rem;color:var(--suave);line-height:1.7}
button{min-height:48px;padding:.85rem 1.35rem;border:1px solid var(--boton);border-radius:0;
  background:var(--boton);color:var(--boton-texto);font:inherit;font-weight:700;
  letter-spacing:.04em;cursor:pointer}
button:focus-visible{outline:3px solid var(--texto);outline-offset:4px}
.resultado{margin-top:clamp(4rem,14vw,9rem);padding-top:2rem;border-top:1px solid var(--borde)}
.mensaje{margin:0;font-size:clamp(1.45rem,6vw,2.6rem);line-height:1.45;overflow-wrap:anywhere}
.puerta{margin-top:clamp(5rem,16vw,10rem)}
.secundario{width:100%;background:transparent;color:var(--texto);border-color:var(--borde);
  text-align:left;line-height:1.45}
.epilogo{margin-top:clamp(5rem,16vw,10rem);padding-top:clamp(3rem,8vw,6rem);
  border-top:1px solid var(--borde);font-family:Georgia,"Times New Roman",serif}
.epilogo h2{font-size:clamp(1.65rem,5vw,2.5rem);line-height:1.25;margin:0 0 3rem}
.epilogo h3{font-size:clamp(1.25rem,4vw,1.7rem);line-height:1.35;margin:5rem 0 2rem}
.epilogo p{font-size:clamp(1.05rem,3vw,1.22rem);line-height:1.85;margin:0 0 1.55rem}
.epilogo pre{overflow-x:auto;margin:2rem 0 2.5rem;padding:1.2rem;border-left:2px solid var(--borde);
  background:rgba(127,127,127,.06);font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}
.epilogo code{font-size:.95rem;line-height:1.65}
.vacio-final{height:70rem}
.septimo-prompt{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;
  font-size:clamp(2rem,7vw,3.5rem);padding-bottom:2rem}
.aviso{margin-top:3rem;color:var(--suave);line-height:1.6}
@media(max-width:520px){
  .vacio-final{height:58rem}
  .secundario{font-size:.9rem}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* RC3.1 · ÚNICO CAMBIO: parpadeo lento del 7.º prompt final */
.septimo-prompt {
  animation: prompt-parpadeo 1.4s steps(1, end) infinite;
}

@keyframes prompt-parpadeo {
  0%, 55% { opacity: 1; }
  56%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .septimo-prompt {
    animation: none;
  }
}