/* ============================================================================
   Columns — layout
   Miller-column drill-down (macOS Finder column view): horizontal list panes
   Category → Subcategory → Items, each selection revealing the next column,
   with a final detail pane on the right. The selected row in each column gets
   a NEUTRAL highlighted surface + left accent (blue stays the single CTA).
   Layout only; color/space/type from --sds-* tokens. Shared vocabulary
   (.cell-item, .st, .num, .muted, review-bar) lives in ../_shared/base.css.
   ========================================================================== */

.app { display: grid; grid-template-columns: 224px 1fr; min-height: calc(100vh - 34px); }

/* ---- Rail ---------------------------------------------------------------- */
.rail {
  border-right: 1px solid var(--sds-color-border);
  background: var(--sds-color-surface);
  position: sticky; top: 34px; height: calc(100vh - 34px);
  display: flex; flex-direction: column;
  padding: var(--sds-space-400) var(--sds-space-300);
  gap: var(--sds-space-200);
  overflow: auto;
}
.brand { display: flex; align-items: center; gap: 10px; padding: var(--sds-space-200) var(--sds-space-200) var(--sds-space-300); }
.brand sds-logo { --sds-logo-height: 22px; height: 22px; display: inline-flex; }
.brand .product { font-family: var(--sds-font-family-headline); font-weight: var(--sds-font-weight-bold); font-size: 16px; letter-spacing: .01em; }
.brand .product .sub { color: var(--sds-color-text-muted); font-weight: var(--sds-font-weight-regular); }
.rail sds-sidenav { width: 100%; }

/* ---- Main column --------------------------------------------------------- */
.main { min-width: 0; display: flex; flex-direction: column; }

.pagehead {
  display: flex; align-items: center; gap: var(--sds-space-400);
  padding: var(--sds-space-400) var(--sds-space-500);
  border-bottom: 1px solid var(--sds-color-border);
}
.pagehead .actions { margin-left: auto; display: flex; align-items: center; gap: var(--sds-space-200); }
.pagehead .actions sds-search { width: 260px; }

/* ---- Miller columns ------------------------------------------------------ */
.miller { flex: 1; min-height: 0; display: grid; grid-template-columns: 220px 234px 288px 1fr; }

.col {
  min-width: 0; display: flex; flex-direction: column;
  border-right: 1px solid var(--sds-color-border);
  background: var(--sds-color-surface);
  overflow-y: auto;
}
.col-h {
  position: sticky; top: 0; z-index: 1;
  padding: var(--sds-space-300) var(--sds-space-400) var(--sds-space-200);
  background: var(--sds-color-surface);
  border-bottom: 1px solid var(--sds-color-border);
  font-size: var(--sds-type-caption-size);
  font-weight: var(--sds-font-weight-bold);
  color: var(--sds-color-text-muted);
}
.col-h .num { color: var(--sds-color-text-muted); }

.rows { padding: var(--sds-space-200); display: flex; flex-direction: column; gap: 2px; }

/* a list row — full-width button, neutral by default */
.cell {
  appearance: none; border: 0; background: transparent; text-align: left;
  font: inherit; color: var(--sds-color-text); cursor: pointer; width: 100%;
  display: flex; align-items: center; gap: var(--sds-space-300);
  padding: var(--sds-space-200) var(--sds-space-300);
  border-radius: var(--sds-radius-m);
  border-left: 2px solid transparent;
}
.cell:hover { background: var(--sds-color-surface-hover); }
.cell .lab { flex: 1; min-width: 0; font-size: var(--sds-type-body-small-size); }
.cell .ct { flex: none; color: var(--sds-color-text-muted); font-size: var(--sds-type-body-small-size); }
.cell .chev { flex: none; color: var(--sds-color-text-muted); }

/* selected row — neutral surface + left accent (NOT blue fill) */
.cell.sel {
  background: var(--sds-color-surface-strong);
  border-left-color: var(--sds-color-text);
}
.cell.sel:hover { background: var(--sds-color-surface-strong); }
.cell.sel .lab { font-weight: var(--sds-font-weight-bold); }
.cell.sel .chev { color: var(--sds-color-text); }

/* item-row variant (thumbnail + name/code) is taller */
.cell-row { align-items: center; padding: var(--sds-space-200) var(--sds-space-300); }
.cell-row .cell-item { flex: 1; min-width: 0; }
.cell-row .iname { font-size: var(--sds-type-body-small-size); }

/* ---- Detail pane --------------------------------------------------------- */
.detail { min-width: 0; background: var(--sds-color-bg); overflow-y: auto; padding: var(--sds-space-500); }
.dcard { --sds-card-corner-radius: var(--sds-radius-l); max-width: 460px; }

.dhead { display: flex; gap: var(--sds-space-400); align-items: flex-start; }
.tn-lg {
  width: 88px; height: 66px; flex: none; border-radius: var(--sds-radius-m);
  border: 1px solid var(--sds-color-border);
  background:
    linear-gradient(var(--sds-color-surface-strong), var(--sds-color-surface-strong)) padding-box,
    repeating-linear-gradient(135deg, var(--sds-color-border) 0 1px, transparent 1px 7px);
}
.dhead-meta { min-width: 0; }
.dname {
  font-family: var(--sds-font-family-headline);
  font-size: var(--sds-type-headline-5-size);
  line-height: var(--sds-type-headline-5-line);
  font-weight: var(--sds-type-headline-5-weight);
  margin: 0;
}
.dcode { margin-top: var(--sds-space-100); color: var(--sds-color-text-muted); font-size: var(--sds-type-body-small-size); }
.dtags { display: flex; align-items: center; gap: var(--sds-space-300); margin-top: var(--sds-space-300); }

.dcard sds-divider { display: block; margin: var(--sds-space-400) 0; }

/* key/value parameter list */
.specs { margin: 0; display: flex; flex-direction: column; }
.spec {
  display: flex; align-items: baseline; justify-content: space-between; gap: var(--sds-space-400);
  padding: var(--sds-space-200) 0;
  border-top: 1px solid var(--sds-color-border);
  font-size: var(--sds-type-body-small-size);
}
.spec:first-child { border-top: 0; }
.spec dt { color: var(--sds-color-text-muted); }
.spec dd { margin: 0; color: var(--sds-color-text); text-align: right; }

.dactions { display: flex; gap: var(--sds-space-200); margin-top: var(--sds-space-400); flex-wrap: wrap; }

@media (max-width: 1180px) {
  .miller { grid-template-columns: 200px 210px 1fr; }
  .col-items { display: none; }
}