/* ============================================================
   Backup & Restore
   ============================================================ */

.backup-overlay {
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.backup-overlay.is-visible {
  opacity: 1;
}

.backup-modal {
  max-width: 560px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  transform: translateY(12px) scale(0.98);
  opacity: 0;
  transition:
    transform var(--duration-normal) var(--ease-out),
    opacity var(--duration-normal) var(--ease-out);
}

.backup-overlay.is-visible .backup-modal {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.backup-body {
  padding: 0 24px 8px;
}

.backup-section {
  margin-bottom: 24px;
}

.backup-section__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.backup-section__title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.backup-section__head .backup-section__title {
  margin-bottom: 0;
}

.backup-section__meta {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-tertiary);
}

.backup-section__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: 14px;
}

/* Stats grid */
.backup-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.backup-stat {
  padding: 12px 10px;
  text-align: center;
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.backup-stat__value {
  display: block;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: 1;
}

.backup-stat__label {
  display: block;
  margin-top: 4px;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* Export actions */
.backup-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.backup-action {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* File drop zone */
.backup-file-drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 28px 20px;
  margin-bottom: 16px;
  color: var(--color-text-secondary);
  background: var(--color-bg-subtle);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    border-color var(--duration-fast) var(--ease-out),
    background-color var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
}

.backup-file-drop:hover,
.backup-file-drop.is-dragover {
  color: var(--color-accent);
  background: var(--color-accent-soft);
  border-color: color-mix(in srgb, var(--color-accent) 40%, var(--color-border));
}

.backup-file-drop__text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.backup-file-drop__hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* Import validation */
.backup-import-empty {
  padding: 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  text-align: center;
  background: var(--color-bg-subtle);
  border-radius: var(--radius-md);
}

.backup-import-empty--success {
  color: var(--color-accent);
  background: var(--color-accent-soft);
  border: 1px solid color-mix(in srgb, var(--color-accent) 25%, var(--color-border));
}

.backup-validation {
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.backup-validation--valid {
  background: color-mix(in srgb, var(--color-accent) 6%, var(--color-bg-subtle));
  border-color: color-mix(in srgb, var(--color-accent) 25%, var(--color-border));
}

.backup-validation--invalid {
  background: color-mix(in srgb, #7c5c4a 8%, var(--color-bg-subtle));
  border-color: color-mix(in srgb, #7c5c4a 25%, var(--color-border));
}

.backup-validation__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.backup-validation__badge {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.backup-validation--valid .backup-validation__badge {
  color: var(--color-accent);
}

.backup-validation--invalid .backup-validation__badge {
  color: #7c5c4a;
}

[data-theme="dark"] .backup-validation--invalid .backup-validation__badge {
  color: #c4a882;
}

.backup-validation__file {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

.backup-validation__date {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.backup-validation__errors {
  margin: 0 0 12px;
  padding-left: 18px;
  font-size: var(--font-size-sm);
  color: #7c5c4a;
  line-height: var(--line-height-relaxed);
}

[data-theme="dark"] .backup-validation__errors {
  color: #c4a882;
}

.backup-compare {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 16px;
  padding: 12px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-sm);
}

.backup-compare__heading {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.backup-compare__arrow {
  font-size: var(--font-size-lg);
  color: var(--color-text-tertiary);
}

.backup-mini-stats {
  list-style: none;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.backup-footer {
  border-top: 1px solid var(--color-border);
}

.backup-restore-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Toast */
.backup-toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  z-index: 650;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-inverse);
  background-color: var(--color-accent);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition:
    opacity var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
  pointer-events: none;
}

.backup-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 480px) {
  .backup-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .backup-actions {
    flex-direction: column;
  }

  .backup-action {
    width: 100%;
    justify-content: center;
  }
}