#qbc-admin-email-root {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.qbc-settings-actions-card {
  display: flex;
  min-height: 100%;
  box-sizing: border-box;
  flex-direction: column;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 24px;
  background: #fff;
  color: #0f172a;
  box-shadow: 0 8px 24px rgba(15, 23, 42, .05);
}

.qbc-settings-actions-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid #eef2f7;
  padding-bottom: 16px;
}

.qbc-settings-actions-heading h3 {
  margin: 0;
  color: #1e293b;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
}

.qbc-settings-actions-heading p {
  margin: 4px 0 0;
  color: #94a3b8;
  font-size: 12px;
  line-height: 1.5;
}

.qbc-settings-actions {
  display: grid;
  flex: 1;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-content: center;
  gap: 14px;
  padding-top: 20px;
}

.qbc-settings-actions .qbc-maintenance-trigger,
.qbc-settings-actions .qbc-admin-email-trigger {
  position: static;
  display: inline-flex !important;
  width: 100%;
  min-height: 72px;
  box-sizing: border-box;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 12px 16px;
  box-shadow: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: .2s ease;
}

.qbc-settings-actions .qbc-maintenance-trigger {
  background: #0f172a;
  color: #fff;
}

.qbc-settings-actions .qbc-maintenance-trigger:hover {
  background: #1e293b;
  transform: translateY(-1px);
}

.qbc-settings-actions .qbc-admin-email-trigger {
  background: #2563eb;
  color: #fff;
}

.qbc-settings-actions .qbc-admin-email-trigger:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
}

.qbc-admin-email-trigger {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 9998;
  border: 1px solid #2563eb;
  border-radius: 8px;
  padding: 11px 16px;
  background: #2563eb;
  color: #fff;
  box-shadow: 0 10px 24px rgba(37, 99, 235, .24);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
}

.qbc-admin-email-trigger:hover {
  background: #1d4ed8;
}

.qbc-admin-email-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(15, 23, 42, .48);
}

.qbc-admin-email-overlay[hidden] {
  display: none;
}

.qbc-admin-email-panel {
  display: flex;
  width: min(720px, 100%);
  max-height: min(760px, calc(100vh - 48px));
  flex-direction: column;
  overflow: hidden;
  border: 1px solid #dbe3ef;
  border-radius: 10px;
  background: #fff;
  color: #0f172a;
  box-shadow: 0 24px 70px rgba(15, 23, 42, .22);
}

.qbc-admin-email-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid #e8eef5;
  padding: 20px 24px 16px;
}

.qbc-admin-email-header h2 {
  margin: 0;
  font-size: 17px;
  line-height: 1.4;
}

.qbc-admin-email-header p {
  margin: 5px 0 0;
  color: #64748b;
  font-size: 12px;
}

.qbc-admin-email-close {
  display: inline-flex;
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: #64748b;
  cursor: pointer;
  font-size: 25px;
  line-height: 1;
}

.qbc-admin-email-close:hover {
  background: #f1f5f9;
  color: #0f172a;
}

.qbc-admin-email-body {
  overflow-y: auto;
  padding: 20px 24px;
}

.qbc-admin-email-section + .qbc-admin-email-section {
  margin-top: 20px;
  border-top: 1px solid #eef2f7;
  padding-top: 20px;
}

.qbc-admin-email-label,
.qbc-admin-email-recipient label,
.qbc-admin-email-fields label > span {
  display: block;
  margin-bottom: 7px;
  color: #334155;
  font-size: 12px;
  font-weight: 600;
}

.qbc-admin-email-modes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.qbc-admin-email-mode {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 42px;
  border: 1px solid #dbe3ef;
  border-radius: 8px;
  padding: 0 12px;
  color: #475569;
  cursor: pointer;
  font-size: 13px;
}

.qbc-admin-email-mode:has(input:checked) {
  border-color: #60a5fa;
  background: #eff6ff;
  color: #1d4ed8;
}

.qbc-admin-email-mode input {
  accent-color: #2563eb;
}

.qbc-admin-email-recipient {
  margin-top: 14px;
}

.qbc-admin-email-recipient select,
.qbc-admin-email-fields input,
.qbc-admin-email-fields textarea {
  width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 7px;
  padding: 10px 11px;
  background: #fff;
  color: #0f172a;
  font: inherit;
  font-size: 13px;
  outline: none;
}

.qbc-admin-email-recipient select:focus,
.qbc-admin-email-fields input:focus,
.qbc-admin-email-fields textarea:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, .12);
}

.qbc-admin-email-all-note {
  margin-top: 14px;
  border: 1px solid #bfdbfe;
  border-radius: 7px;
  padding: 10px 11px;
  background: #eff6ff;
  color: #1e40af;
  font-size: 12px;
}

.qbc-admin-email-fields {
  display: grid;
  gap: 16px;
}

.qbc-admin-email-fields textarea {
  min-height: 180px;
  resize: vertical;
  line-height: 1.6;
}

.qbc-admin-email-feedback {
  min-height: 20px;
  margin-top: 16px;
  color: #64748b;
  font-size: 12px;
  line-height: 1.5;
}

.qbc-admin-email-feedback.is-success {
  color: #15803d;
}

.qbc-admin-email-feedback.is-warning {
  color: #b45309;
}

.qbc-admin-email-feedback.is-error {
  color: #dc2626;
}

.qbc-admin-email-footer {
  display: flex;
  justify-content: flex-end;
  border-top: 1px solid #e8eef5;
  padding: 14px 24px;
}

.qbc-admin-email-submit {
  border: 1px solid #2563eb;
  border-radius: 7px;
  padding: 9px 18px;
  background: #2563eb;
  color: #fff;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
}

.qbc-admin-email-submit:hover {
  background: #1d4ed8;
}

.qbc-admin-email-submit:disabled {
  cursor: wait;
  opacity: .55;
}

@media (max-width: 640px) {
  .qbc-settings-actions-card {
    padding: 18px;
  }

  .qbc-settings-actions {
    grid-template-columns: 1fr;
  }

  .qbc-admin-email-trigger {
    right: 16px;
    bottom: 16px;
  }

  .qbc-admin-email-overlay {
    align-items: flex-end;
    padding: 12px;
  }

  .qbc-admin-email-panel {
    max-height: calc(100vh - 24px);
  }

  .qbc-admin-email-header,
  .qbc-admin-email-body {
    padding-left: 16px;
    padding-right: 16px;
  }

  .qbc-admin-email-footer {
    padding-left: 16px;
    padding-right: 16px;
  }
}