/* Demo data retention modal + activation — large tap targets, 375px friendly */
:root {
  --mdr-bg: #0f172a;
  --mdr-card: #ffffff;
  --mdr-text: #0f172a;
  --mdr-muted: #475569;
  --mdr-accent: #0f766e;
  --mdr-danger: #b91c1c;
  --mdr-border: #cbd5e1;
  --mdr-btn-min: 44px;
}

.mdr-page {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(160deg, #ecfeff 0%, #f8fafc 45%, #e2e8f0 100%);
  font-family: "Noto Sans TC", "Noto Sans SC", "Segoe UI", sans-serif;
  color: var(--mdr-text);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px 16px;
}

.mdr-card {
  width: 100%;
  max-width: 420px;
  background: var(--mdr-card);
  border: 1px solid var(--mdr-border);
  border-radius: 12px;
  padding: 20px 18px 24px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

.mdr-card h1 {
  font-size: 1.35rem;
  margin: 0 0 8px;
  line-height: 1.3;
}

.mdr-lead, .mdr-info {
  color: var(--mdr-muted);
  margin: 0 0 16px;
  line-height: 1.45;
  font-size: 0.98rem;
}

.mdr-error {
  color: var(--mdr-danger);
  font-weight: 600;
  margin: 0 0 12px;
}

.mdr-help {
  color: var(--mdr-muted);
  font-size: 0.9rem;
  line-height: 1.4;
  margin: 6px 0 0;
}

.mdr-label {
  display: block;
  font-weight: 600;
  margin: 10px 0 6px;
}

.mdr-input {
  width: 100%;
  box-sizing: border-box;
  min-height: var(--mdr-btn-min);
  font-size: 16px; /* avoid iOS zoom */
  padding: 10px 12px;
  border: 1px solid var(--mdr-border);
  border-radius: 8px;
}

.mdr-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--mdr-btn-min);
  min-width: var(--mdr-btn-min);
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--mdr-border);
  background: #f8fafc;
  color: var(--mdr-text);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  margin-top: 12px;
  width: 100%;
}

.mdr-btn--primary {
  background: var(--mdr-accent);
  border-color: var(--mdr-accent);
  color: #fff;
}

.mdr-btn--ghost {
  background: transparent;
}

/* Overlay modal */
.mdr-modal[hidden] { display: none !important; }
.mdr-modal {
  position: fixed;
  inset: 0;
  z-index: 10050;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background: rgba(15, 23, 42, 0.55);
  padding: 12px;
}
@media (min-width: 640px) {
  .mdr-modal { align-items: center; }
}
.mdr-modal__panel {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border-radius: 12px;
  padding: 18px 16px 16px;
  max-height: 92vh;
  overflow: auto;
}
.mdr-modal__actions {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}
.mdr-modal__status {
  min-height: 1.25em;
  margin-top: 8px;
  color: var(--mdr-muted);
  font-size: 0.95rem;
}
.mdr-modal__status.is-error { color: var(--mdr-danger); font-weight: 600; }

/* Banner keep CTA */
.sb-demo-banner__keep {
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  font-weight: 700;
}

@media (max-width: 375px), (min-resolution: 2dppx) {
  .mdr-card h1 { font-size: 1.25rem; }
  .mdr-btn, .sb-demo-banner__keep { font-size: 1.05rem; }
}