.login-layer {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(16, 24, 40, .54);
  backdrop-filter: blur(4px);
}
.login-layer[hidden] { display: none; }
.login-card {
  width: min(420px, 100%);
  padding: 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 20px 45px rgba(16, 24, 40, .2);
}
.login-card h2 { margin: 6px 0; }
.login-card p { margin: 0 0 16px; color: var(--muted); }
.login-card button { width: 100%; }
.login-error { display: block; min-height: 20px; margin-top: 10px; color: var(--red); }