/* ============================================================================
   PLUMB — app shell + layout primitives
   Inverted-L chrome: left rail + top bar wrapping the work surface.
   ========================================================================= */
@layer layout {

.app {
  display: grid;
  grid-template-columns: var(--nav-w) minmax(0, 1fr);
  min-height: 100vh;
}
body[data-nav="collapsed"] .app { grid-template-columns: var(--nav-w-collapsed) minmax(0, 1fr); }

/* ═══ LEFT RAIL ════════════════════════════════════════════════════════════ */
.nav {
  position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column;
  background: var(--sunken);
  border-right: 1px solid var(--border);
  overflow: hidden;
}
.nav__brand {
  display: flex; align-items: center; gap: var(--s-5);
  height: var(--topbar-h); padding: 0 var(--s-6);
  border-bottom: 1px solid var(--border);
  flex: 0 0 var(--topbar-h);
  text-decoration: none; color: inherit;
}
.nav__mark { width: 22px; height: 22px; flex: 0 0 22px; }
/* the wordmark leaves the app, so say so on hover rather than letting it look
   like a dead link back to the page you are already on */
.nav__out { margin-left: auto; display: grid; place-content: center; color: var(--muted);
  opacity: 0; transition: opacity var(--d-fast) var(--ease-out); }
.nav__out svg { width: 12px; height: 12px; }
.nav__brand:hover .nav__out, .nav__brand:focus-visible .nav__out { opacity: 1; }
.nav__brand:hover .nav__word { color: var(--brand-ink); }
.nav__brand:focus-visible { outline: none; box-shadow: var(--focus); border-radius: var(--r-sm); }
body[data-nav="collapsed"] .nav__out { display: none; }
@media (max-width: 1180px) { .nav__out { display: none; } }
.nav__word {
  font-family: var(--font-display);
  font-variation-settings: "wdth" 118;
  font-weight: var(--w-dense);
  font-size: 15px; letter-spacing: 0.055em;
  color: var(--ink); text-transform: uppercase;
}
body[data-nav="collapsed"] .nav__word { display: none; }

.nav__entity {
  margin: var(--s-5) var(--s-5) var(--s-3);
  padding: var(--s-4) var(--s-5);
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-md); cursor: pointer; text-align: left;
  display: flex; align-items: center; gap: var(--s-4); width: calc(100% - var(--s-10));
  transition: border-color var(--d-fast) var(--ease-out);
}
.nav__entity:hover { border-color: var(--border-loud); }
.nav__entity svg { width: 15px; height: 15px; flex: 0 0 15px; color: var(--muted); }
.nav__entity div { min-width: 0; }
.nav__entity:focus-visible { outline: none; box-shadow: var(--focus); }
.nav__entity-lbl { font-size: 9.5px; text-transform: uppercase; letter-spacing: var(--track-label);
  color: var(--muted); font-weight: var(--w-semi); display: block; }
.nav__entity-val { font-size: var(--t-xs); font-weight: var(--w-semi); color: var(--ink);
  display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 1px; }
body[data-nav="collapsed"] .nav__entity { justify-content: center; }
body[data-nav="collapsed"] .nav__entity div { display: none; }

.nav__scroll { flex: 1; overflow-y: auto; padding: var(--s-3) var(--s-5) var(--s-8); }
.nav__scroll::-webkit-scrollbar { width: 6px; }

.nav__group { margin-top: var(--s-6); }
.nav__group:first-child { margin-top: var(--s-2); }
.nav__group-lbl {
  padding: var(--s-3) var(--s-4) var(--s-3);
  font-size: 9.5px; font-weight: var(--w-semi);
  letter-spacing: var(--track-label); text-transform: uppercase; color: var(--muted);
}
body[data-nav="collapsed"] .nav__group-lbl { text-align: center; font-size: 0; padding: var(--s-4) 0; }
body[data-nav="collapsed"] .nav__group-lbl::after {
  content: ""; display: block; height: 1px; background: var(--border); margin: 0 var(--s-4);
}

.nav__link {
  position: relative;
  display: flex; align-items: center; gap: var(--s-5);
  padding: 0 var(--s-4); height: 29px;
  border-radius: var(--r-sm);
  font-size: var(--t-sm); font-weight: var(--w-norm); color: var(--ink-2);
  text-decoration: none; white-space: nowrap;
  transition: background-color var(--d-press) var(--ease-out), color var(--d-press) var(--ease-out);
}
.nav__link:hover { background: var(--sunken-2); color: var(--ink); }
.nav__link[aria-current="page"] {
  background: var(--brand-soft); color: var(--brand-ink); font-weight: var(--w-semi);
}
.nav__link:focus-visible { outline: none; box-shadow: var(--focus); }
.nav__link svg { width: 15px; height: 15px; flex: 0 0 15px; opacity: 0.85; }
.nav__link[aria-current="page"] svg { opacity: 1; }
.nav__badge {
  margin-left: auto; font-size: 10px; font-weight: var(--w-semi);
  font-variant-numeric: tabular-nums; padding: 0 5px; min-width: 17px; text-align: center;
  border-radius: var(--r-full); background: var(--sunken-2); color: var(--muted);
}
.nav__link[aria-current="page"] .nav__badge { background: var(--brand-line); color: var(--brand-ink); }
.nav__badge--hot { background: var(--signal); color: var(--on-signal); }
body[data-nav="collapsed"] .nav__link { justify-content: center; padding: 0; }
body[data-nav="collapsed"] .nav__link span, body[data-nav="collapsed"] .nav__badge { display: none; }

.nav__foot { padding: var(--s-5); border-top: 1px solid var(--border); display: flex; gap: var(--s-3); }
body[data-nav="collapsed"] .nav__foot { flex-direction: column; }

/* ═══ MAIN + TOP BAR ═══════════════════════════════════════════════════════ */
.main { display: flex; flex-direction: column; min-width: 0; }

.topbar {
  position: sticky; top: 0; z-index: var(--z-sticky);
  display: flex; align-items: center; gap: var(--s-6);
  height: var(--topbar-h); padding: 0 var(--s-9);
  background: color-mix(in oklch, var(--canvas) 88%, transparent);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.topbar__crumbs {
  display: flex; align-items: center; gap: var(--s-4);
  font-size: var(--t-sm); color: var(--muted); min-width: 0;
}
.topbar__crumbs a { color: var(--muted); text-decoration: none; }
.topbar__crumbs a:hover { color: var(--ink-2); }
.topbar__crumbs b { color: var(--ink); font-weight: var(--w-semi); letter-spacing: var(--track-tight); }
.topbar__sep { color: var(--border-loud); }
.topbar__spacer { flex: 1; }

.cmdk-btn {
  display: flex; align-items: center; gap: var(--s-5);
  height: 28px; padding: 0 var(--s-4) 0 var(--s-5);
  background: var(--surface); border: 1px solid var(--border-strong);
  border-radius: var(--r-sm); cursor: pointer;
  font-size: var(--t-xs); color: var(--muted); min-width: 190px;
  transition: border-color var(--d-fast) var(--ease-out);
}
.cmdk-btn:hover { border-color: var(--border-loud); }
.cmdk-btn:focus-visible { outline: none; box-shadow: var(--focus); }
.cmdk-btn svg { width: 13px; height: 13px; }
.cmdk-btn .kbd { margin-left: auto; }

.page { flex: 1; padding: var(--s-9); min-width: 0; }
.page--flush { padding: 0; }
.page--tight { padding: var(--s-8) var(--s-9); }

.page__head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: var(--s-9); margin-bottom: var(--s-9); flex-wrap: wrap;
}
.page__title {
  font-family: var(--font-display); font-variation-settings: "wdth" 106;
  font-size: var(--t-2xl); font-weight: var(--w-semi);
  letter-spacing: var(--track-display); line-height: var(--lh-tight);
}
.page__sub { font-size: var(--t-sm); color: var(--muted); margin-top: var(--s-3); max-width: 68ch; }
.page__acts { display: flex; align-items: center; gap: var(--s-4); flex-wrap: wrap; }

/* ═══ GRID PRIMITIVES ══════════════════════════════════════════════════════ */
.grid { display: grid; gap: var(--s-8); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.row { display: flex; align-items: center; gap: var(--s-5); }
.row--between { justify-content: space-between; }
.row--wrap { flex-wrap: wrap; }
.col { display: flex; flex-direction: column; gap: var(--s-5); }
.stack > * + * { margin-top: var(--s-8); }

/* work-surface split: filters rail + content */
.split {
  display: grid; grid-template-columns: 196px minmax(0, 1fr);
  gap: 0; align-items: start; min-height: calc(100vh - var(--topbar-h));
}
.split__rail {
  position: sticky; top: var(--topbar-h);
  padding: var(--s-8) var(--s-6);
  border-right: 1px solid var(--border);
  max-height: calc(100vh - var(--topbar-h)); overflow-y: auto;
}
.split__main { padding: 0; min-width: 0; }

.viewlist { display: flex; flex-direction: column; gap: 1px; }
.viewlist a {
  display: flex; align-items: center; gap: var(--s-4);
  padding: 0 var(--s-4); height: 27px; border-radius: var(--r-sm);
  font-size: var(--t-xs); color: var(--ink-2); text-decoration: none;
  transition: background-color var(--d-press) var(--ease-out);
}
.viewlist a:hover { background: var(--sunken); }
.viewlist a[aria-current="true"] { background: var(--brand-soft); color: var(--brand-ink); font-weight: var(--w-semi); }
.viewlist .n { margin-left: auto; font-size: 10px; color: var(--muted); font-variant-numeric: tabular-nums; }

/* ═══ COMMAND PALETTE — opens instantly, no entry animation ═══════════════ */
.palette__scrim {
  position: fixed; inset: 0; z-index: calc(var(--z-palette) - 1);
  background: var(--scrim);
  backdrop-filter: blur(2px); -webkit-backdrop-filter: blur(2px);
}
.palette {
  position: fixed; z-index: var(--z-palette);
  top: 15vh; left: 50%; transform: translateX(-50%);
  width: min(620px, calc(100vw - 32px));
  background: var(--overlay); border: 1px solid var(--border-strong);
  border-radius: var(--r-xl); box-shadow: var(--lift-modal);
  overflow: hidden; display: flex; flex-direction: column;
  max-height: 62vh;
}
.palette__input {
  display: flex; align-items: center; gap: var(--s-5);
  padding: var(--s-7) var(--s-8); border-bottom: 1px solid var(--border);
}
.palette__input svg { width: 16px; height: 16px; color: var(--muted); }
.palette__input input {
  border: 0; background: none; padding: 0; font-size: var(--t-lg);
  font-weight: var(--w-norm); letter-spacing: var(--track-tight);
}
.palette__input input:focus-visible { box-shadow: none; }
.palette__results { overflow-y: auto; padding: var(--s-4); }
.palette__group { padding: var(--s-5) var(--s-4) var(--s-2); font-size: var(--t-micro);
  font-weight: var(--w-semi); letter-spacing: var(--track-label);
  text-transform: uppercase; color: var(--muted); }
.palette__item {
  display: flex; align-items: center; gap: var(--s-5); width: 100%;
  padding: var(--s-4) var(--s-5); border: 0; background: none; border-radius: var(--r-sm);
  cursor: pointer; text-align: left; font-size: var(--t-sm); color: var(--ink-2);
  text-decoration: none;
}
.palette__item[data-active="true"] { background: var(--brand-soft); color: var(--brand-ink); }
.palette__item svg { width: 15px; height: 15px; color: var(--muted); }
.palette__item[data-active="true"] svg { color: var(--brand-ink); }
.palette__item .meta { margin-left: auto; font-size: var(--t-micro); color: var(--muted);
  font-variant-numeric: tabular-nums; }
.palette__foot {
  display: flex; align-items: center; gap: var(--s-6); padding: var(--s-4) var(--s-8);
  border-top: 1px solid var(--border); background: var(--sunken);
  font-size: var(--t-micro); color: var(--muted);
}
.palette__foot span { display: flex; align-items: center; gap: var(--s-3); }

/* ═══ RESPONSIVE: structural, not fluid type ══════════════════════════════ */
@media (max-width: 1180px) {
  .app { grid-template-columns: var(--nav-w-collapsed) minmax(0, 1fr); }
  .nav__word, .nav__link span, .nav__badge, .nav__entity div { display: none; }
  .nav__link { justify-content: center; padding: 0; }
  .nav__entity { justify-content: center; }
  .nav__group-lbl { font-size: 0; padding: var(--s-4) 0; }
  .nav__group-lbl::after { content: ""; display: block; height: 1px; background: var(--border); margin: 0 var(--s-4); }
}
@media (max-width: 900px) {
  .split { grid-template-columns: minmax(0, 1fr); }
  .split__rail { position: static; max-height: none; border-right: 0; border-bottom: 1px solid var(--border); }
  .viewlist { flex-direction: row; overflow-x: auto; gap: var(--s-3); }
  .viewlist a { white-space: nowrap; }
  .page { padding: var(--s-8); }
}
/* Several screens set grid-template-columns inline to tune a specific split.
   Inline styles beat stylesheet rules, so collapsing them on small screens has
   to be forced — this is the one place !important is the correct tool. */
@media (max-width: 880px) {
  .grid, .grid--2, .grid--3, .grid--4,
  .field-grid, .field-grid--2, .rev, .split, .calc, .ints {
    grid-template-columns: minmax(0, 1fr) !important;
  }
  .rev__doc, .rev__form { border-right: 0; border-bottom: 1px solid var(--border); }
  .rev { height: auto; overflow: visible; }
  .rev__ai { position: static; width: auto; transform: none; border-left: 0; }
  .page__head { flex-direction: column; align-items: stretch; }
  .panel__head { flex-wrap: wrap; }
  .toolbar { gap: var(--s-3); }
  .searchbox { min-width: 0; flex: 1 1 140px; }
  [style*="position:sticky"], [style*="position: sticky"] { position: static !important; }
}

@media (max-width: 640px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .nav { display: none; }
  .page { padding: var(--s-7) var(--s-6); }
  .topbar { padding: 0 var(--s-6); }
  .cmdk-btn { min-width: 0; }
  .cmdk-btn span, .cmdk-btn .kbd { display: none; }
  .page__title { font-size: var(--t-xl); }
  .toaster { left: var(--s-6); right: var(--s-6); bottom: var(--s-6); max-width: none; }
}

}