.auth-modal {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.72); z-index: 200;
}
.auth-modal.hidden { display: none; }
.auth-box {
  background: #111; border: 1px solid #2e2e2e; border-radius: 8px;
  padding: 24px; display: flex; flex-direction: column; gap: 10px;
  min-width: 280px; max-width: 340px; width: 90%;
}
.auth-title { font-size: .95rem; color: #ddd; font-weight: 600; margin-bottom: 2px; }
.auth-box input {
  background: #1a1a1a; border: 1px solid #333; border-radius: 4px;
  color: #ddd; font-size: .85rem; padding: 8px 10px; outline: none;
}
.auth-box input:focus { border-color: #555; }
.auth-error { color: #e06060; font-size: .76rem; min-height: 14px; }
.auth-submit {
  background: #222; border: 1px solid #444; border-radius: 4px;
  color: #ddd; font-size: .85rem; padding: 9px; cursor: pointer; margin-top: 2px;
}
.auth-submit:hover:not(:disabled) { background: #2e2e2e; }
.auth-submit:disabled { opacity: .45; cursor: default; }
.auth-switch { font-size: .73rem; color: #555; text-align: center; cursor: pointer; }
.auth-switch:hover { color: #888; }