fix import av csv

src/styles.css

@@ -1510,6 +1510,62 @@ body {
   grid-column: span 2;
 }
 
+.csv-import-guide {
+  margin-top: 12px;
+  border: 1px solid var(--line);
+  border-radius: 12px;
+  background: var(--surface-elevated);
+  overflow: hidden;
+}
+
+.csv-import-guide > summary {
+  padding: 11px 13px;
+  color: var(--text);
+  font-weight: 700;
+  cursor: pointer;
+}
+
+.csv-import-guide[open] > summary {
+  border-bottom: 1px solid var(--line);
+  background: color-mix(in srgb, var(--accent-2) 8%, transparent);
+}
+
+.csv-import-guide-body {
+  padding: 12px 13px 14px;
+}
+
+.csv-import-guide-body p {
+  margin: 0 0 8px;
+  color: var(--muted);
+  line-height: 1.45;
+}
+
+.csv-import-guide-body p strong {
+  color: var(--text);
+}
+
+.csv-import-example-label {
+  display: block;
+  margin: 12px 0 6px;
+  color: var(--muted);
+  font-size: 0.8rem;
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: 0.06em;
+}
+
+.csv-import-guide pre {
+  margin: 0;
+  padding: 11px 12px;
+  overflow-x: auto;
+  border: 1px solid var(--line);
+  border-radius: 9px;
+  background: var(--field-bg);
+  color: var(--field-text);
+  font-size: 0.8rem;
+  line-height: 1.5;
+}
+
 .actions {
   display: flex;
   gap: 10px;