.formulario {
  max-width: 800px;
  margin: 2rem auto;
  padding: 1.5rem;
  background: var(--panel, #12121a);
  border: 1px solid var(--stroke, #1f1f2b);
  border-radius: 14px;
  color: var(--ink, #eaeaf0);
  font-family: system-ui, sans-serif;
}

.formulario h2 {
  margin-bottom: 1rem;
  color: var(--a, #00ff88);
  text-align: center;
}

details {
  margin: .4rem 0 .4rem 1rem;
  padding-left: .5rem;
  border-left: 1px solid #333;
}

summary {
  cursor: pointer;
  padding: .3rem .5rem;
  border-radius: 6px;
  transition: background .2s;
}

summary:hover {
  background: rgba(0,255,136,0.15);
}

