/* Detail mode has no filter sidebar; do not reserve its grid column. */
.atlas-shell {
  grid-template-columns: 248px minmax(0, 1fr);
}

.atlas-shell[data-mode=detail] {
  grid-template-columns: minmax(0, 1fr) 320px;
  grid-template-areas: "topbar topbar" "viewer metadata";
}

.atlas-shell > *,
.brand-block,
.topbar-search,
.viewer-topbar > *,
.metadata-panel section {
  min-width: 0;
}

.atlas-topbar .collection-filter {
  width: auto;
  flex-shrink: 0;
}

.topbar-search {
  flex: 1 1 240px;
}

.viewer-topbar {
  gap: 18px;
  flex-wrap: wrap;
}

.viewer-topbar .toolbar {
  gap: 6px;
}

.stage {
  min-width: 0;
  min-height: 460px;
  min-height: min(64vh, 760px);
}

.pattern-output {
  flex-shrink: 0;
  max-width: 100%;
}

.pattern-output.compare-mode {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.compare-pane {
  min-width: 0;
}

.compare-pane figcaption {
  text-align: center;
  margin-bottom: 12px;
}

.control-strip label {
  min-width: 0;
}

.control-strip input[type=range] {
  width: 112px;
  max-width: 100%;
}

.metadata-panel {
  max-height: none;
  overflow-wrap: anywhere;
}

.json-preview,
.mvp-debug {
  max-width: 100%;
  overflow: auto;
}

.browse-disclosure > summary {
  display: none;
}

@media (min-width: 901px) {
  .browse-disclosure:not([open]) > .filter-panel {
    display: flex;
  }
}

@media (max-width: 1050px) {
  .atlas-shell[data-mode=detail] {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "topbar" "viewer" "metadata";
    grid-template-rows: auto auto auto;
  }

  .metadata-panel {
    border-left: 0;
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .metadata-panel > section {
    margin: 0;
  }

  .metadata-panel .source-summary {
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) {
  .atlas-shell {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto 1fr;
    grid-template-areas: "topbar" "sidebar" "gallery";
  }

  .atlas-topbar {
    padding: 16px 20px;
    gap: 12px;
    flex-wrap: wrap;
  }

  .topbar-search {
    max-width: none;
    flex-basis: 100%;
    order: 5;
  }

  .brand-block {
    flex: 1;
  }

  .atlas-sidebar {
    padding: 12px 20px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    gap: 12px;
    overflow: visible;
  }

  .browse-disclosure > summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-weight: 600;
    min-height: 40px;
    list-style: none;
  }

  .browse-disclosure > summary::-webkit-details-marker {
    display: none;
  }

  .browse-disclosure[open] > summary {
    margin-bottom: 12px;
  }

  .filter-panel {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .filter-panel > .facet-chips,
  .filter-panel > .facet-heading,
  .filter-panel > .clear-filters {
    grid-column: 1 / -1;
  }

  .atlas-sidebar .workbench-drawer {
    margin-top: 0;
  }

  .metadata-panel { border-inline-start: 0; }

  .gallery-head,
  .viewer-topbar,
  .control-strip {
    padding-left: 20px;
    padding-right: 20px;
  }

  .example-list {
    padding-left: 20px;
    padding-right: 20px;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

@media (max-width: 560px) {
  .atlas-topbar {
    gap: 8px;
    padding: 14px 16px;
  }

  .brand-block h1 {
    font-size: 21px;
    line-height: 1.4;
    overflow-wrap: anywhere;
  }

  .brand-block p {
    font-size: 11px;
  }

  .atlas-topbar .collection-filter {
    order: 6;
    flex: 1;
  }

  #collection-export {
    order: 7;
  }

  .atlas-sidebar,
  .gallery-head,
  .viewer-topbar,
  .control-strip,
  .metadata-panel {
    padding-left: 16px;
    padding-right: 16px;
  }

  .example-list,
  .example-list.density-list {
    grid-template-columns: minmax(0, 1fr);
    padding: 16px 16px 40px;
    gap: 20px;
  }

  .list-toolbar {
    padding-left: 16px;
    padding-right: 16px;
  }

  .gallery-head {
    flex-wrap: wrap;
    gap: 12px;
  }

  .viewer-topbar .toolbar {
    width: 100%;
    flex-wrap: wrap;
  }

  .stage {
    padding: 16px;
    height: 50svh;
    min-height: 360px;
    min-height: 50svh;
  }

  .atlas-svg {
    max-height: calc(50svh - 32px);
  }

  .pattern-output.compare-mode {
    grid-template-columns: minmax(0, 1fr);
  }

  .metadata-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .control-strip {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .control-strip label {
    flex-wrap: wrap;
    gap: 4px;
  }

  .control-strip select {
    max-width: 100%;
  }

  .control-strip input[type=range] {
    width: 100%;
  }

  .context-list div {
    flex-wrap: wrap;
  }

  .mvp-compare {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}