:root {
  --fondo: #0f1115;
  --panel: #171a21;
  --borde: #2a2f3a;
  --texto: #e6e8eb;
  --suave: #9aa3b2;
  --acento: #4f8cff;
  --ok: #3ecf8e;
  --error: #ff5a5f;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  background: var(--fondo);
  color: var(--texto);
  font: 15px/1.5 -apple-system, Segoe UI, Roboto, sans-serif;
}
.envoltorio { max-width: 760px; margin: 0 auto; padding: 2rem 1.2rem 4rem; }
header.top { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 1.5rem; }
header.top h1 { font-size: 1.3rem; margin: 0; }
header.top span { color: var(--suave); font-size: .85rem; }
.tarjeta {
  background: var(--panel);
  border: 1px solid var(--borde);
  border-radius: 10px;
  padding: 1.2rem 1.4rem;
  margin-bottom: 1.2rem;
}
.tarjeta h2 { font-size: 1rem; margin: 0 0 .9rem; }
.fila { display: flex; align-items: center; gap: .6rem; margin-bottom: .7rem; flex-wrap: wrap; }
.fila label { min-width: 170px; color: var(--suave); font-size: .88rem; }
input[type=text], input[type=password], select {
  background: #0c0e12;
  border: 1px solid var(--borde);
  color: var(--texto);
  border-radius: 6px;
  padding: .5rem .6rem;
  font-size: .9rem;
  flex: 1;
  min-width: 180px;
}
button {
  background: var(--acento);
  color: white;
  border: none;
  border-radius: 6px;
  padding: .5rem .9rem;
  font-size: .85rem;
  cursor: pointer;
}
button.secundario { background: #2a2f3a; }
button.peligro { background: var(--error); }
button:disabled { opacity: .5; cursor: default; }
.msg { font-size: .82rem; margin-top: .3rem; }
.msg.ok { color: var(--ok); }
.msg.error { color: var(--error); }
.check { display: flex; align-items: center; gap: .5rem; }
.mono { font-family: ui-monospace, monospace; font-size: .82rem; word-break: break-all; background: #0c0e12; border: 1px solid var(--borde); border-radius: 6px; padding: .5rem .7rem; }
.barra-guardar {
  position: sticky; bottom: 0; background: var(--panel); border-top: 1px solid var(--borde);
  padding: .8rem 1.4rem; display: flex; justify-content: flex-end; gap: .6rem; border-radius: 10px; margin-top: 1rem;
}
.login-caja { max-width: 340px; margin: 4rem auto; }
.login-caja h1 { text-align: center; font-size: 1.2rem; }
small.ayuda { color: var(--suave); display: block; margin-top: .2rem; font-size: .78rem; }