.csv-join-files { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.csv-join-file, .csv-join-settings-file { display: grid; gap: 8px; padding: 16px; border: 1px dashed #a9c3e9; border-radius: 12px; background: #f4f8ff; }
.csv-join-settings-file { margin-top: 12px; background: #fbfcff; border-style: solid; }
.csv-join-file input, .csv-join-settings-file input { padding: 8px 0; border: 0; background: transparent; }
.csv-join-controls { display: grid; gap: 14px; margin-top: 16px; }
.csv-join-panel { padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-muted); }
.csv-join-panel h3 { margin: 0 0 6px; font-size: 1rem; }
.csv-join-key-grid { display: grid; grid-template-columns: minmax(100px, .7fr) minmax(0, 1fr) minmax(0, 1fr); gap: 8px 10px; align-items: center; }
.csv-join-key-grid select { min-width: 0; }
.csv-join-options { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.csv-join-options label { display: inline-flex; align-items: center; gap: 7px; }
.csv-join-options input { width: auto; }
.csv-join-output-columns { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px 14px; }
.csv-join-output-columns label { display: flex; align-items: center; gap: 7px; min-width: 0; }
.csv-join-output-columns input { width: auto; }
.csv-join-output-columns span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.csv-join-help { margin: 0; color: var(--muted); font-size: .86rem; }
.csv-join-preview, .csv-join-result { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.csv-join-preview[hidden], .csv-join-result[hidden] { display: none; }
.csv-join-table-wrap { max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.csv-join-table-wrap table { min-width: 520px; margin-top: 10px; font-size: .86rem; }
.csv-join-table-wrap td { white-space: nowrap; }
.csv-join-result { padding: 18px; border: 1px solid #9bcdaa; border-radius: 12px; background: #f2fbf5; }
.csv-join-result h3 { margin: 0 0 6px; }
.csv-join-note { margin: 10px 0 0; color: var(--muted); font-size: .86rem; }
@media (max-width: 760px) {
  .csv-join-files { grid-template-columns: 1fr; }
  .csv-join-key-grid { grid-template-columns: minmax(88px, .75fr) minmax(0, 1fr) minmax(0, 1fr); font-size: .92rem; }
  .csv-join-output-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 420px) {
  .csv-join-key-grid { grid-template-columns: minmax(68px, .7fr) minmax(0, 1fr) minmax(0, 1fr); gap: 7px 6px; }
  .csv-join-key-grid select { padding-left: 5px; padding-right: 5px; }
  .csv-join-output-columns { grid-template-columns: 1fr; }
}