.auth-gate {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(248, 248, 252, .96);
  backdrop-filter: blur(10px);
}
.auth-gate[hidden] { display: none; }
.auth-panel {
  width: min(440px, 100%);
  max-height: calc(100dvh - 48px);
  overflow-x: hidden;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 24px 70px rgba(30, 25, 55, .14);
}
.auth-panel-head { padding: 24px 26px 18px; border-bottom: 1px solid var(--border); }
.auth-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.auth-brand .brand-mark { width: 32px; height: 32px; font-size: 18px; }
.auth-brand strong { font-size: 14px; }
.auth-panel h2 { margin: 0; font-size: 22px; letter-spacing: -.3px; }
.auth-panel-copy { margin: 7px 0 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.auth-form { display: grid; gap: 14px; padding: 22px 26px 24px; }
.auth-field { display: grid; gap: 6px; }
.auth-field[hidden] { display: none; }
.auth-field span { color: #344054; font-size: 11px; font-weight: 650; }
.auth-field input {
  width: 100%;
  height: 40px;
  padding: 0 11px;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  outline: 0;
  background: #fff;
  color: var(--text);
  font-size: 13px;
}
.auth-field input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.auth-field input[aria-invalid="true"] { border-color: var(--danger); box-shadow: 0 0 0 3px var(--danger-soft); }
.auth-field-hint { color: var(--muted); font-size: var(--font-meta); line-height: 1.45; }
.auth-field-error { color: var(--danger); font-size: var(--font-meta); line-height: 1.45; }
.auth-field-error[hidden] { display: none; }
.auth-error { min-height: 18px; margin: -2px 0; color: var(--danger); font-size: 11px; line-height: 1.45; }
.auth-submit { width: 100%; margin-top: 2px; }
.auth-retry { width: 100%; margin-top: 2px; }
.auth-retry[hidden] { display: none; }
.auth-form.auth-offline .auth-field,
.auth-form.auth-offline .auth-submit { display: none; }
.auth-security-note {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  padding: 10px 11px;
  border-radius: 7px;
  background: var(--primary-soft);
  color: #5d42bd;
  font-size: var(--font-meta);
  line-height: 1.5;
}
.auth-security-note .icon { width: 15px; height: 15px; flex: 0 0 auto; margin-top: 1px; }
.auth-logout-button { height: 30px; padding: 0 8px; font-size: var(--font-meta); }
body[data-auth-state="anonymous"] .app { display: none; }
body[data-auth-state="anonymous"] .app[aria-hidden="true"] { cursor: default; }
@media (max-width: 600px) {
  .auth-gate { padding: 10px; backdrop-filter: none; }
  .auth-panel { max-height: calc(100dvh - 20px); border-radius: 10px; box-shadow: 0 16px 42px rgba(30, 25, 55, .12); }
  .auth-panel-head { padding: 16px 18px 12px; }
  .auth-form { gap: 10px; padding: 14px 18px 16px; }
  .auth-brand { margin-bottom: 12px; }
  .auth-panel h2 { font-size: 20px; }
  .auth-panel-copy { margin-top: 5px; line-height: 1.4; }
  .auth-field { gap: 5px; }
  .auth-field input { height: 42px; }
  .auth-security-note { padding: 8px 9px; line-height: 1.4; }
  .auth-gate[data-auth-mode="login"] .auth-field-hint { display: none; }
}