:root{
  --bg: #0b1220;
  --paper: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --primary: #2563eb;
  --ring: 0 10px 30px rgba(2,6,23,.08);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  color:var(--ink);
  background:
    radial-gradient(1200px 1200px at 10% -10%, #c7d2fe22, transparent 40%),
    radial-gradient(1000px 1000px at 110% 10%, #93c5fd22, transparent 40%),
    #f8fafc;
  line-height:1.5;
}

.container{
  max-width:1100px;
  margin-inline:auto;
  padding:clamp(16px,2vw,24px);
}

.header{
  text-align:center;
  margin:18px 0 12px 0;
}
.title{
  font-size:clamp(28px,4vw,44px);
  letter-spacing:-.02em;
  margin:0 0 8px 0;
}
.subtitle{
  color:var(--muted);
  margin:0;
}

/* Figure */
.figure{
  margin:24px auto;
  background:var(--paper);
  border-radius:16px;
  box-shadow: var(--ring);
  overflow:hidden;
  border:1px solid #e2e8f0;
  width:50%;
}
.figure img{
  width:100%;
  display:block;
  object-fit:cover;
}
.figcap{
  padding:14px 16px;
  font-size:14px;
  color:var(--muted);
  background:#f8fafc;
  border-top:1px solid #e2e8f0;
}

/* Content cards */
.grid{
  display:grid;
  gap:16px;
  grid-template-columns: repeat(auto-fit,minmax(260px,1fr));
  margin-top:18px;
}
.card{
  background:var(--paper);
  border:1px solid #e2e8f0;
  border-radius:14px;
  padding:16px;
  box-shadow: var(--ring);
}
.card h3{
  margin:0 0 8px 0;
  font-size:18px;
}
.card ul{margin:0; padding-left:18px}
.badge{
  display:inline-block;
  font-size:12px;
  color:#0f172a;
  background:#e2e8f0;
  border-radius:999px;
  padding:3px 10px;
}

/* Footer + button */
.actions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:center;
  margin:20px 0 8px;
}
.btn{
  appearance:none;
  border:1px solid #cbd5e1;
  background:var(--paper);
  color:var(--ink);
  padding:10px 14px;
  border-radius:10px;
  cursor:pointer;
  text-decoration:none;
  font-weight:600;
}
.btn.primary{
  background:var(--primary);
  border-color:transparent;
  color:white;
}
footer{
  text-align:center;
  color:var(--muted);
  font-size:14px;
  margin:12px 0 30px;
}

/* Preferencias de lectura */
@media (prefers-color-scheme: dark){
  body{background:#0b1220;color:#e5e7eb}
  .figure,.card{background:#0b1220;border-color:#1f2937}
  .figcap{background:#0b1220;border-color:#1f2937;color:#94a3b8}
  .btn{background:#111827;color:#e5e7eb;border-color:#374151}
}