:root {
  color-scheme: light dark;
  --tinta: #12212e;
  --tinta-suave: #4a5b6a;
  --fondo: #ffffff;
  --fondo-suave: #f4f7fa;
  --borde: #d9e2ea;
  --acento: #1d4ed8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --tinta: #e8eef4;
    --tinta-suave: #a8b8c6;
    --fondo: #0e1620;
    --fondo-suave: #16212c;
    --borde: #27333f;
    --acento: #7aa2ff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0;
  background: var(--fondo);
  color: var(--tinta);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.barra {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: baseline;
  justify-content: space-between;
  padding-block: 18px;
  padding-inline: 20px;
  border-bottom: 1px solid var(--borde);
  background: var(--fondo-suave);
}

.marca {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--tinta);
}

nav a {
  margin-right: 16px;
  color: var(--tinta-suave);
  text-decoration: none;
}

nav a:hover, a:hover { text-decoration: underline; }

main {
  max-width: 46rem;
  margin: 0 auto;
  padding-block: 32px 56px;
  padding-inline: 20px;
}

h1 { font-size: 1.9rem; line-height: 1.2; letter-spacing: -0.02em; }
h2 { margin-top: 2.2rem; font-size: 1.3rem; }
h3 { margin-top: 1.6rem; font-size: 1.05rem; }

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

table {
  width: 100%;
  border-collapse: collapse;
  margin-block: 1rem;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid var(--borde);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

th { background: var(--fondo-suave); }

code {
  background: var(--fondo-suave);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.92em;
}

.aviso {
  margin: 0;
  padding: 10px 20px;
  background: #fde68a;
  color: #4a3608;
  font-size: 0.92rem;
}

footer {
  border-top: 1px solid var(--borde);
  background: var(--fondo-suave);
  color: var(--tinta-suave);
  padding-block: 24px;
  padding-inline: 20px;
  font-size: 0.9rem;
}

footer p { margin: 4px 0; }

/* Las tablas largas no deben desbordar en móviles */
@media (max-width: 480px) {
  main { padding-inline: 16px; }
  table { display: block; overflow-x: auto; }
}