:root {
  --fondo: #f3f4f6;
  --tarjeta: #ffffff;
  --texto: #1f2328;
  --suave: #57606a;
  --acento: #2f6fd6;
  --borde: #d0d7de;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fondo: #16181c;
    --tarjeta: #1f2228;
    --texto: #e6e8eb;
    --suave: #9aa3ad;
    --acento: #73a7ff;
    --borde: #33373e;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--fondo);
  color: var(--texto);
  font: 17px/1.6 -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
}
header, main, footer { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 56px; padding-bottom: 24px; }
h1 { font-size: 2.4rem; line-height: 1.15; margin: 0 0 8px; letter-spacing: -0.02em; }
h2 { font-size: 1.3rem; margin: 0 0 12px; }
h3 { font-size: 1.05rem; margin: 24px 0 6px; }
.lema { font-size: 1.25rem; margin: 0; }
.plataforma, .fecha { color: var(--suave); margin: 4px 0 0; }
section {
  background: var(--tarjeta);
  border: 1px solid var(--borde);
  border-radius: 10px;
  padding: 20px 24px;
  margin-bottom: 20px;
}
ul { padding-left: 20px; }
li { margin-bottom: 6px; }
a { color: var(--acento); }
code { font-size: 0.9em; overflow-wrap: anywhere; }
footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  color: var(--suave);
  padding-top: 8px;
  padding-bottom: 48px;
}