/* ============================================================================
   Application shell
   ----------------------------------------------------------------------------
   Layout strategy

   1024px and above  Two column grid. The sidebar is a permanent rail that can
                     be collapsed to icons when the operator wants the width.
   Below 1024px      Single column. The sidebar becomes an off canvas drawer
                     with a scrim, a focus trap and Escape to close. This covers
                     every phone and iPad in portrait, where a fixed 248px rail
                     would consume a third of the screen.

   Heights use dvh so collapsing mobile browser chrome cannot clip the last row
   of content, with a vh fallback for older Safari.
   ========================================================================== */

/* ── Boot screen ────────────────────────────────────────────────────────── */
.boot-screen {
  position: fixed;
  inset: 0;
  z-index: var(--z-loader);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--gutter);
  background: var(--surface-page);
  text-align: center;
  transition: opacity var(--duration-slow) var(--ease-out);
}

.boot-screen[hidden] {
  display: none;
}

.boot-screen.is-leaving {
  opacity: 0;
  pointer-events: none;
}

.boot-mark {
  color: var(--accent-ink);
}

.boot-title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  letter-spacing: -0.02em;
  color: var(--ink-strong);
}

.boot-subtitle {
  font-size: var(--text-sm);
  color: var(--ink-muted);
}

.boot-track {
  width: min(200px, 56vw);
  height: 3px;
  overflow: hidden;
  border-radius: var(--radius-pill);
  background: var(--surface-raised);
}

.boot-indicator {
  width: 38%;
  height: 100%;
  border-radius: var(--radius-pill);
  background: var(--accent);
  animation: bootSlide 1.15s var(--ease-in-out) infinite;
}

@keyframes bootSlide {
  from {
    transform: translateX(-110%);
  }
  to {
    transform: translateX(330%);
  }
}

/* ── Grid ───────────────────────────────────────────────────────────────── */
#app {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  width: 100%;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  transition: grid-template-columns var(--transition);
}

#app.is-rail {
  grid-template-columns: var(--sidebar-rail) minmax(0, 1fr);
}

/* ── Sidebar ────────────────────────────────────────────────────────────── */
#sidebar {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  background: var(--surface-chrome);
  border-right: 1px solid var(--line);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: var(--topbar-height);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--line);
  flex-shrink: 0;
}

/* The brand block must be allowed to shrink, or a long tagline pushes past the
   sidebar edge instead of truncating. min-width on a flex child defaults to
   auto, which is the whole reason overflow escapes here. */
.brand-text {
  min-width: 0;
  overflow: hidden;
}

.brand-name {
  display: block;
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  letter-spacing: -0.02em;
  line-height: var(--leading-tight);
  color: var(--ink-strong);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-tagline {
  display: block;
  font-size: var(--text-2xs);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--ink-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-nav {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--space-3) var(--space-2) var(--space-4);
}

.nav-section {
  padding: var(--space-4) var(--space-3) var(--space-2);
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--ink-muted);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  min-height: var(--tap-target);
  padding: var(--space-2) var(--space-3);
  margin-bottom: 1px;
  border-radius: var(--radius-md);
  color: var(--ink-soft);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-align: left;
  white-space: nowrap;
  transition:
    background-color var(--transition),
    color var(--transition);
}

.nav-item:hover {
  background: var(--surface-hover);
  color: var(--ink-strong);
  text-decoration: none;
}

/* The active item is marked by a solid rule against the sidebar edge. A tinted
   pill alone is easy to lose at a glance on a dense list. */
.nav-item[aria-current='page'] {
  position: relative;
  background: var(--accent-wash);
  color: var(--accent-ink);
  font-weight: var(--weight-semibold);
}

.nav-item[aria-current='page']::before {
  content: '';
  position: absolute;
  left: calc(var(--space-2) * -1);
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 22px;
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
  background: var(--accent);
}

.nav-label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-item[aria-disabled='true'] {
  opacity: 0.42;
  cursor: not-allowed;
}

.nav-item[aria-disabled='true']:hover {
  background: transparent;
  color: var(--ink-soft);
}

.sidebar-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  flex-shrink: 0;
  padding: var(--space-3) var(--space-4);
  padding-bottom: max(var(--space-3), env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  font-size: var(--text-2xs);
  color: var(--ink-muted);
}

/* A standalone link needs its own target area rather than relying on the
   inline link exception in WCAG 2.2 SC 2.5.8. */
.sidebar-footer a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  min-height: 24px;
  padding-inline: var(--space-2);
  margin-inline: calc(var(--space-2) * -1);
  border-radius: var(--radius-sm);
  color: var(--ink-muted);
}

.sidebar-footer a:hover {
  color: var(--accent-ink);
}

/* Collapsed rail, desktop only. */
#app.is-rail .nav-label,
#app.is-rail .brand-text,
#app.is-rail .nav-section,
#app.is-rail .sidebar-footer {
  display: none;
}

#app.is-rail .nav-item {
  justify-content: center;
  gap: 0;
  padding-inline: var(--space-2);
}

#app.is-rail .sidebar-brand {
  justify-content: center;
  padding-inline: var(--space-2);
}

/* ── Drawer scrim ─────────────────────────────────────────────────────────
   A plain scrim. Blurring the background costs a full-screen compositing pass
   on every frame of the drawer animation, which is exactly the wrong trade on
   the low-end Android tablets this is likely to run on.                     */
#sidebar-scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-scrim);
  background: var(--scrim);
  opacity: 0;
  transition: opacity var(--transition);
}

/* ── Main column ────────────────────────────────────────────────────────── */
#main-wrapper {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background: var(--surface-page);
}

/* ── Topbar ─────────────────────────────────────────────────────────────── */
#topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  height: var(--topbar-height);
  flex-shrink: 0;
  padding-inline: var(--gutter);
  background: var(--surface-chrome);
  border-bottom: 1px solid var(--line);
  z-index: var(--z-topbar);
}

.topbar-start {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1 1 auto;
  min-width: 0;
}

.topbar-end {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-shrink: 0;
}

/* Compact brand, shown only while the sidebar is off canvas. */
.topbar-brand {
  display: none;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.topbar-brand-name {
  font-size: var(--text-md);
  font-weight: var(--weight-bold);
  letter-spacing: -0.02em;
  color: var(--ink-strong);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-search {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  height: 36px;
  width: clamp(190px, 26vw, 330px);
  padding-inline: var(--space-3);
  background: var(--surface-field);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: var(--ink-muted);
  transition:
    border-color var(--transition),
    box-shadow var(--transition);
}

.topbar-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-wash);
}

.topbar-search input {
  flex: 1;
  min-width: 0;
  background: none;
  border: none;
  outline: none;
  font-size: var(--text-sm);
  color: var(--ink-strong);
}

.topbar-search input::placeholder {
  color: var(--ink-muted);
}

.data-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border: 1px solid color-mix(in srgb, var(--positive-ink) 32%, transparent);
  border-radius: var(--radius-pill);
  background: var(--positive-wash);
  color: var(--positive-ink);
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  white-space: nowrap;
}

.data-pill-dot {
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  border-radius: 50%;
  background: currentColor;
}

/* ── Filter panel ───────────────────────────────────────────────────────── */
#filter-panel {
  flex-shrink: 0;
  display: grid;
  grid-template-rows: 0fr;
  background: var(--surface-chrome);
  border-bottom: 1px solid var(--line);
  transition: grid-template-rows var(--duration-slow) var(--ease-out);
}

#filter-panel.is-open {
  grid-template-rows: 1fr;
}

.filter-clip {
  overflow: hidden;
  min-height: 0;
}

.filter-body {
  padding: var(--space-4) var(--gutter) var(--space-5);
  max-height: min(52vh, 400px);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.filter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.filter-heading {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--ink);
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-4) var(--space-3);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}

.field-label {
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--ink-muted);
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  max-width: 100%;
  padding: 3px 3px 3px var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--accent-wash);
  color: var(--accent-ink);
  font-size: var(--text-2xs);
  font-weight: var(--weight-medium);
}

.chip-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chip-remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  border-radius: 50%;
  color: inherit;
}

.chip-remove:hover {
  background: var(--accent-wash-strong);
}

.count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 17px;
  height: 17px;
  padding-inline: 4px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: #fff;
  font-size: 10px;
  font-weight: var(--weight-bold);
  font-variant-numeric: tabular-nums;
}

/* ── Main content ───────────────────────────────────────────────────────── */
#main-content {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior-y: contain;
  -webkit-overflow-scrolling: touch;
}

.page-content {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: var(--space-6) var(--gutter);
  padding-bottom: calc(var(--space-12) + env(safe-area-inset-bottom));
}

/* ── Toasts ─────────────────────────────────────────────────────────────── */
#toast-region {
  position: fixed;
  z-index: var(--z-toast);
  right: var(--gutter);
  bottom: calc(var(--gutter) + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
  max-width: min(400px, calc(100vw - 2 * var(--gutter)));
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: var(--surface-card);
  color: var(--ink);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity var(--transition),
    transform var(--transition);
}

.toast.is-visible {
  opacity: 1;
  transform: none;
}

.toast-success {
  border-left-color: var(--positive-ink);
}
.toast-success .icon {
  color: var(--positive-ink);
}
.toast-warning {
  border-left-color: var(--caution-ink);
}
.toast-warning .icon {
  color: var(--caution-ink);
}
.toast-error {
  border-left-color: var(--critical-ink);
}
.toast-error .icon {
  color: var(--critical-ink);
}
.toast-info {
  border-left-color: var(--accent-ink);
}
.toast-info .icon {
  color: var(--accent-ink);
}

/* ══════════════════════════════════════════════════════════════════════════
   Wide desktop
   ══════════════════════════════════════════════════════════════════════ */
@media (min-width: 1600px) {
  :root {
    --sidebar-width: 268px;
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   Below 1024px: the sidebar becomes a drawer.
   Phones, iPad portrait (768, 820, 834) and laptops in split view.
   ══════════════════════════════════════════════════════════════════════ */
@media (max-width: 1023.98px) {
  #app,
  #app.is-rail {
    grid-template-columns: minmax(0, 1fr);
  }

  #sidebar {
    position: fixed;
    inset-block: 0;
    inset-inline-start: 0;
    z-index: var(--z-sidebar);
    width: min(304px, 86vw);
    box-shadow: var(--shadow-xl);
    transform: translateX(-102%);
    visibility: hidden;
    transition:
      transform var(--duration-slow) var(--ease-out),
      visibility var(--duration-slow);
  }

  body.nav-open #sidebar {
    transform: none;
    visibility: visible;
  }

  /* Rail styling must never leak into the drawer. */
  #app.is-rail .nav-label,
  #app.is-rail .brand-text,
  #app.is-rail .nav-section {
    display: revert;
  }

  #app.is-rail .sidebar-footer {
    display: flex;
  }

  #app.is-rail .nav-item {
    justify-content: flex-start;
    gap: var(--space-3);
    padding-inline: var(--space-3);
  }

  #app.is-rail .sidebar-brand {
    justify-content: flex-start;
    padding-inline: var(--space-4);
  }

  #sidebar-scrim {
    display: block;
    pointer-events: none;
  }

  body.nav-open #sidebar-scrim {
    opacity: 1;
    pointer-events: auto;
  }

  body.nav-open {
    overflow: hidden;
  }

  .topbar-brand {
    display: flex;
  }

  /* Slightly larger hit areas once the pointer is a thumb. */
  .nav-item {
    min-height: 48px;
    font-size: var(--text-md);
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   Below 900px: drop the inline search and rely on the search page.
   ══════════════════════════════════════════════════════════════════════ */
@media (max-width: 899.98px) {
  .topbar-search {
    display: none;
  }

  .data-pill .pill-text {
    display: none;
  }

  .data-pill {
    padding-inline: var(--space-2);
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   Below 640px: phones.
   ══════════════════════════════════════════════════════════════════════ */
@media (max-width: 639.98px) {
  :root {
    --topbar-height: 54px;
    --tap-target: 42px;
  }

  #topbar {
    gap: var(--space-2);
  }

  .data-pill {
    display: none;
  }

  #toast-region {
    left: var(--gutter);
    right: var(--gutter);
    max-width: none;
  }

  .filter-grid {
    grid-template-columns: 1fr;
  }

  .filter-body {
    max-height: 62vh;
  }

  .page-content {
    padding-top: var(--space-5);
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   Below 400px: iPhone SE, folded devices.
   ══════════════════════════════════════════════════════════════════════ */
@media (max-width: 399.98px) {
  :root {
    --tap-target: 40px;
  }

  .topbar-brand-name {
    display: none;
  }

  #sidebar {
    width: 92vw;
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   Short landscape phones: reclaim vertical space.
   ══════════════════════════════════════════════════════════════════════ */
@media (max-height: 520px) and (orientation: landscape) {
  :root {
    --topbar-height: 46px;
  }

  .sidebar-brand {
    min-height: 46px;
    padding-block: var(--space-2);
  }

  .nav-item {
    min-height: 38px;
  }
}