* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: flex; align-items: center; justify-content: center;
  font-family: var(--rc-font); background: var(--rc-bg); color: var(--rc-green);
}
.tarjeta {
  width: min(360px, 90vw); padding: 32px 28px; background: var(--rc-bg-panel); border-radius: 16px;
  border: 1px solid var(--rc-green-dim);
}
h1 { margin: 0 0 20px; font-size: 20px; letter-spacing: .06em; text-transform: uppercase;
     color: var(--rc-green-bright); }
.form { display: flex; flex-direction: column; gap: 10px; }
.rc-switch-form { margin: 6px 0 0; font-size: 14.4px; color: var(--rc-green-dim); text-align: center; }
.rc-switch-form a { color: var(--rc-green-bright); cursor: pointer; text-decoration: underline; }
.form.oculto { display: none; }
input {
  padding: 12px 14px; font-size: 14px;
}
button[type="submit"] {
  margin-top: 4px; padding: 12px; font-size: 14px; font-weight: 600; text-transform: uppercase;
  letter-spacing: .04em;
}
.error { min-height: 16px; margin: 0; font-size: 12px; color: #ff5555; }

@media (max-width: 400px) {
  .tarjeta { padding: 22px 18px; }
}