:root {
  --migration-control-size: 36px;
  --migration-row-size: 44px;
  --migration-table-min-size: 980px;
  --migration-panel-min-size: 228px;
  --migration-file-size: 280px;
}

.migration-workbench {
  display: grid;
  gap: var(--space-3);
  min-width: 0;
  color: var(--ink);
}

.migration-heading,
.migration-tabs,
.migration-status,
.migration-panel {
  border: 1px solid var(--line);
  background: var(--surface);
}

.migration-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 76px;
  padding: var(--space-4);
  border-radius: 8px 8px 0 0;
}

.migration-heading h2 {
  margin: var(--space-1) 0 0;
  font-size: 24px;
  line-height: 1.2;
}

.migration-account-context {
  display: grid;
  gap: var(--space-1);
  justify-items: end;
}

.migration-account-context span,
.migration-operation-panel header span,
.migration-preview-panel header span,
.migration-audit-form header span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.migration-account-context strong {
  font-size: 14px;
}

.migration-tabs {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0 var(--space-4);
  overflow-x: auto;
  border-radius: 0;
}

.migration-tabs button {
  position: relative;
  flex: 0 0 auto;
  min-height: 46px;
  padding: 0 var(--space-4);
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.migration-tabs button::after {
  position: absolute;
  right: var(--space-3);
  bottom: 0;
  left: var(--space-3);
  height: 2px;
  background: transparent;
  content: "";
}

.migration-tabs button:hover,
.migration-tabs button.is-active {
  color: var(--teal);
}

.migration-tabs button.is-active::after {
  background: var(--teal);
}

.migration-tabs button:focus-visible,
.migration-workbench button:focus-visible,
.migration-workbench input:focus-visible,
.migration-workbench select:focus-visible {
  outline: 3px solid rgba(20, 184, 166, 0.28);
  outline-offset: 1px;
}

.migration-status {
  min-height: 38px;
  margin: 0;
  padding: 9px var(--space-4);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.migration-status[data-state="success"] {
  color: var(--teal);
  background: var(--surface-accent);
}

.migration-status[data-state="error"] {
  color: var(--rose);
  background: var(--rose-soft);
}

.migration-status[data-state="busy"] {
  color: var(--blue);
  background: var(--blue-soft);
}

.migration-panel {
  min-width: 0;
  padding: var(--space-4);
  border-radius: 0 0 8px 8px;
}

.migration-import-grid,
.migration-package-layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  gap: var(--space-4);
}

.migration-operation-panel,
.migration-preview-panel,
.migration-audit-form {
  display: grid;
  align-content: start;
  gap: var(--space-4);
  min-width: 0;
  padding: var(--space-4);
  border: 1px solid var(--line-subtle);
  border-radius: 6px;
  background: var(--surface-2);
}

.migration-operation-panel header,
.migration-preview-panel header,
.migration-audit-form > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.migration-operation-panel header strong,
.migration-preview-panel header strong,
.migration-audit-form header strong,
.migration-section-toolbar strong {
  font-size: 16px;
}

.migration-operation-panel > label {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  align-items: center;
  gap: var(--space-2);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.migration-operation-panel input,
.migration-operation-panel select,
.migration-preview-panel button,
.migration-audit-form input,
.migration-backup-section input,
.migration-backup-section select,
.migration-backup-section button {
  min-height: var(--migration-control-size);
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
}

.migration-operation-panel input,
.migration-operation-panel select,
.migration-audit-form input,
.migration-backup-section input,
.migration-backup-section select {
  width: 100%;
  min-width: 0;
  padding: 0 var(--space-3);
}

.migration-inline-field {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr) max-content;
  align-items: center;
  gap: var(--space-2);
}

.migration-inline-field > label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.migration-inline-field input[type="file"] {
  width: min(100%, var(--migration-file-size));
  padding: 5px var(--space-2);
}

.migration-inline-field button {
  min-width: 84px;
  white-space: nowrap;
}

.migration-workbench button {
  min-height: var(--migration-control-size);
  padding: 0 var(--space-3);
  border: 1px solid var(--teal-border);
  border-radius: 4px;
  background: var(--surface);
  color: var(--teal);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.migration-workbench button:hover:not(:disabled) {
  background: var(--surface-accent);
}

.migration-workbench button:disabled {
  border-color: var(--line);
  color: var(--muted);
  cursor: not-allowed;
  opacity: 0.58;
}

.migration-workbench .migration-primary-button {
  border-color: var(--teal);
  background: var(--teal);
  color: var(--on-accent);
}

.migration-workbench .migration-primary-button:hover:not(:disabled) {
  background: var(--teal);
  filter: brightness(0.94);
}

.migration-import-result,
.migration-preview-panel dl {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  margin: 0;
  padding-top: var(--space-3);
  border-top: 1px solid var(--line-subtle);
}

.migration-import-result div,
.migration-preview-panel dl div {
  min-width: 0;
}

.migration-import-result dt,
.migration-preview-panel dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.migration-import-result dd,
.migration-preview-panel dd {
  min-height: 22px;
  margin: var(--space-1) 0 0;
  overflow: hidden;
  font-size: 13px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.migration-confirm-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
}

.migration-confirm-row input {
  width: 16px;
  min-height: 16px;
  margin-top: 2px;
}

.migration-backup-section {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
  min-width: 0;
}

.migration-section-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 52px;
  padding: var(--space-2) 0;
}

.migration-section-toolbar > div {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.migration-search {
  display: grid;
  grid-template-columns: auto minmax(180px, 260px);
  align-items: center;
  gap: var(--space-2);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.migration-backup-account {
  display: grid;
  grid-template-columns: auto minmax(180px, 260px);
  align-items: center;
  gap: var(--space-2);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.migration-table-scroll {
  min-width: 0;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.migration-backup-table {
  min-width: var(--migration-table-min-size);
  background: var(--surface);
}

.migration-backup-row {
  display: grid;
  grid-template-columns: 40px 56px minmax(220px, 1fr) 140px 120px 180px 210px;
  align-items: center;
  min-height: var(--migration-row-size);
  border-bottom: 1px solid var(--line-subtle);
}

.migration-backup-row:last-child {
  border-bottom: 0;
}

.migration-backup-row > span {
  min-width: 0;
  padding: 0 var(--space-3);
  overflow: hidden;
  font-size: 12px;
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.migration-backup-head {
  min-height: 38px;
  background: var(--surface-table);
  color: var(--muted);
}

.migration-backup-head > span {
  font-weight: 800;
}

.migration-backup-row input[type="checkbox"] {
  width: 16px;
  min-height: 16px;
  margin: 0;
}

.migration-row-actions {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.migration-row-actions button {
  min-height: 28px;
  padding: 0 var(--space-2);
  border-color: transparent;
}

.migration-empty-row {
  display: grid;
  place-items: center;
  min-height: 132px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.migration-audit-form > header {
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--line-subtle);
}

.migration-audit-form > header > div:first-child {
  display: grid;
  gap: var(--space-1);
}

.migration-period-range {
  display: flex;
  align-items: end;
  gap: var(--space-2);
}

.migration-period-range label {
  display: grid;
  gap: var(--space-1);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.migration-audit-form fieldset {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: var(--space-2);
  margin: 0;
  padding: var(--space-4);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.migration-audit-form legend {
  padding: 0 var(--space-2);
  font-size: 13px;
  font-weight: 800;
}

.migration-audit-form fieldset label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--migration-control-size);
  font-size: 13px;
  font-weight: 600;
}

.migration-audit-form fieldset input {
  width: 16px;
  min-height: 16px;
}

.migration-audit-form footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

@media (max-width: 1100px) {
  .migration-import-grid,
  .migration-package-layout {
    grid-template-columns: 1fr;
  }

  .migration-audit-form fieldset {
    grid-template-columns: repeat(2, minmax(120px, 1fr));
  }
}

@media (max-width: 760px) {
  .screen-migration {
    padding-inline: var(--space-2);
  }

  .migration-heading,
  .migration-section-toolbar,
  .migration-section-toolbar > div,
  .migration-audit-form > header,
  .migration-audit-form footer {
    align-items: stretch;
    flex-direction: column;
  }

  .migration-account-context {
    justify-items: start;
  }

  .migration-tabs {
    padding-inline: var(--space-2);
  }

  .migration-panel,
  .migration-operation-panel,
  .migration-preview-panel,
  .migration-audit-form {
    padding: var(--space-3);
  }

  .migration-operation-panel > label,
  .migration-inline-field {
    grid-template-columns: 1fr;
  }

  .migration-inline-field input[type="file"] {
    width: 100%;
  }

  .migration-import-result,
  .migration-preview-panel dl {
    grid-template-columns: 1fr;
  }

  .migration-search,
  .migration-backup-account {
    grid-template-columns: 1fr;
  }

  .migration-period-range {
    align-items: stretch;
    flex-wrap: wrap;
  }

  .migration-period-range label {
    flex: 1 1 180px;
  }

  .migration-audit-form fieldset {
    grid-template-columns: 1fr;
  }
}