/* Greenbelt Maps core components (D-05). Every colour, size, radius, shadow and duration is a token from
   ../tokens/tokens.css; tools/build_components.py --check fails if a colour or a pixel size is typed here.
   The two widths in the container queries (720 px) and the height in the media query (700 px) are the only
   literal lengths, because a query cannot read a custom property.

   Layout answers to the width of the map's own box (.gb-root), not the window, so the same rules work on the
   map's own page, in an iframe and in a narrow column (F05).
     narrow (under 720 px): the layer list and "What is here" are bottom sheets under the map.
     wide (720 px and over): the layer list is a panel beside the map and "What is here" is a pop-up.
     compact header (narrow, or a frame under 700 px tall): the description folds under "About this map". */

/* ---------- Base ---------- */
.gb-page { margin: 0; }
.gb-root {
  container: gbroot / inline-size;
  font-family: var(--gb-font-sans);
  font-size: var(--gb-text-body-size);
  line-height: var(--gb-text-body-line);
  color: var(--gb-colour-ink);
  background: var(--gb-colour-bg);
  text-align: start;
  box-sizing: border-box;
  -webkit-text-size-adjust: 100%;
}
.gb-root *, .gb-root *::before, .gb-root *::after { box-sizing: border-box; }
.gb-root [hidden] { display: none; }
.gb-root :where(h1, h2, h3, h4, p, ul, ol, dl, dd, figure) { margin: 0; padding: 0; }
.gb-root :where(ul, ol) { list-style: none; }
.gb-root :where(button, input, select) { font: inherit; color: inherit; margin: 0; }
.gb-root :where(a) { color: var(--gb-colour-accent); text-underline-offset: 0.15em; }
.gb-root :where(a:hover) { text-decoration-thickness: calc(var(--gb-border-width) * 2); }
.gb-root :focus-visible {
  outline: var(--gb-focus-outline);
  outline-offset: var(--gb-focus-offset);
  box-shadow: var(--gb-focus-halo);
}
.gb-sr {
  position: absolute; width: var(--gb-border-width); height: var(--gb-border-width); margin: calc(var(--gb-border-width) * -1);
  padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0;
}
.gb-icon {
  width: var(--gb-size-icon); height: var(--gb-size-icon); flex: none;
  fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round;
}
.gb-icon .gb-icon__solid { fill: currentColor; stroke: none; }

.gb-h2 { font-size: var(--gb-text-body-size); font-weight: var(--gb-text-secondary-weight-strong); line-height: var(--gb-text-title-line); }
.gb-label {
  font-size: var(--gb-text-label-size); font-weight: var(--gb-text-label-weight); line-height: var(--gb-text-label-line);
  letter-spacing: var(--gb-text-label-letter-spacing); text-transform: var(--gb-text-label-transform); color: var(--gb-colour-muted);
}
.gb-inline-link { display: inline-block; min-height: var(--gb-size-target-min); line-height: var(--gb-size-target-min); }
/* On a touch screen a link that stands on its own is as tall as a control. */
@media (pointer: coarse) {
  .gb-inline-link, .gb-attribution a, .gb-fold__body .gb-rows a { min-height: var(--gb-size-target-touch); line-height: var(--gb-size-target-touch); }
}

/* ---------- Buttons: rectangles act, pills toggle ---------- */
.gb-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--gb-space-2);
  min-height: var(--gb-size-control); padding: 0 var(--gb-space-3);
  font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-secondary-line); font-weight: var(--gb-text-caption-weight-strong);
  color: var(--gb-colour-ink); background: var(--gb-colour-surface); text-decoration: none;
  border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-control);
  cursor: pointer; transition: background-color var(--gb-motion-fast) var(--gb-motion-ease-standard);
}
.gb-btn:hover { background: var(--gb-colour-accent-soft); color: var(--gb-colour-accent-ink); }
.gb-btn--primary { background: var(--gb-colour-accent); color: var(--gb-colour-on-accent); border-color: var(--gb-colour-accent); }
.gb-btn--primary:hover { background: var(--gb-colour-accent-ink); color: var(--gb-colour-on-accent); border-color: var(--gb-colour-accent-ink); }
.gb-btn--quiet { border-color: transparent; background: transparent; padding: 0 var(--gb-space-2); }
.gb-btn[aria-disabled="true"] { color: var(--gb-colour-muted); border-style: dashed; cursor: default; background: var(--gb-colour-surface); }
.gb-btn[aria-expanded="true"] .gb-icon--turn, .gb-fold__btn[aria-expanded="true"] .gb-icon--turn { transform: rotate(90deg); }
.gb-icon--turn { transition: transform var(--gb-motion-fast) var(--gb-motion-ease-standard); }
.gb-iconbtn {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  width: var(--gb-size-control); height: var(--gb-size-control); padding: 0;
  color: var(--gb-colour-ink-2); background: transparent; border: var(--gb-border-width) solid transparent; border-radius: var(--gb-radius-control);
  cursor: pointer; transition: background-color var(--gb-motion-fast) var(--gb-motion-ease-standard);
}
.gb-iconbtn:hover, .gb-iconbtn[aria-expanded="true"] { background: var(--gb-colour-accent-soft); color: var(--gb-colour-accent-ink); border-color: var(--gb-colour-border-control); }
.gb-pill {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--gb-space-1);
  min-height: var(--gb-size-control); padding: 0 var(--gb-space-3);
  font-size: var(--gb-text-caption-size); line-height: var(--gb-text-caption-line); font-weight: var(--gb-text-caption-weight-strong);
  color: var(--gb-colour-ink); background: var(--gb-colour-surface);
  border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-pill); cursor: pointer;
}
.gb-pill[aria-pressed="true"], .gb-pills input:checked + .gb-pill { background: var(--gb-colour-accent); color: var(--gb-colour-on-accent); border-color: var(--gb-colour-accent); }
.gb-pills { display: flex; flex-wrap: wrap; align-items: center; gap: var(--gb-space-2); border: 0; padding: 0; margin: 0; min-width: 0; }
.gb-pills legend { padding: 0; font-size: var(--gb-text-caption-size); color: var(--gb-colour-ink-2); margin-bottom: var(--gb-space-1); }
.gb-pills label { position: relative; display: inline-flex; }
.gb-pills input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; cursor: pointer; }
.gb-pills input:focus-visible + .gb-pill { outline: var(--gb-focus-outline); outline-offset: var(--gb-focus-offset); box-shadow: var(--gb-focus-halo); }
.gb-tag {
  display: inline-block; padding: 0 var(--gb-space-2); border-radius: var(--gb-radius-pill);
  font-size: var(--gb-text-label-size); line-height: var(--gb-space-5); font-weight: var(--gb-text-caption-weight-strong); white-space: nowrap;
  color: var(--gb-colour-ink-2); background: var(--gb-colour-sunk); border: var(--gb-border-width) solid var(--gb-colour-border-control);
}
.gb-tag--internal { color: var(--gb-colour-amber); background: var(--gb-colour-amber-soft); border-color: var(--gb-colour-amber); }
.gb-placeholder { background: var(--gb-colour-hi); color: var(--gb-colour-on-hi); padding: 0 var(--gb-space-1); border-radius: var(--gb-space-1); }

/* ---------- Header ---------- */
.gb-header { position: relative; padding: var(--gb-space-4) var(--gb-space-4) var(--gb-space-3); background: var(--gb-colour-surface); border-bottom: var(--gb-border-width) solid var(--gb-colour-line-2); }
.gb-header__top { display: flex; align-items: flex-start; gap: var(--gb-space-3); }
.gb-header__titles { flex: 1; min-width: 0; }
.gb-header__actions { display: flex; align-items: center; gap: var(--gb-space-1); flex: none; }
.gb-eyebrow { display: flex; flex-wrap: wrap; align-items: center; gap: var(--gb-space-2); margin-bottom: var(--gb-space-1); font-size: var(--gb-text-caption-size); line-height: var(--gb-text-caption-line); font-weight: var(--gb-text-caption-weight-strong); color: var(--gb-colour-ink-2); }
.gb-title { font-size: var(--gb-text-title-size); font-weight: var(--gb-text-title-weight); font-stretch: var(--gb-text-title-stretch); line-height: var(--gb-text-title-line); overflow-wrap: break-word; }
.gb-description { margin-top: var(--gb-space-2); color: var(--gb-colour-ink-2); }
.gb-about-toggle { display: none; }
.gb-header__about[hidden] { display: block; }
.gb-skip {
  position: absolute; inset-inline-start: var(--gb-space-4); top: var(--gb-space-2); z-index: 5;
  padding: var(--gb-space-2) var(--gb-space-3); background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-control);
  font-size: var(--gb-text-secondary-size); font-weight: var(--gb-text-caption-weight-strong);
}
.gb-skip:not(:focus) { width: var(--gb-border-width); height: var(--gb-border-width); padding: 0; overflow: hidden; clip-path: inset(50%); border: 0; white-space: nowrap; }

@container gbroot (max-width: 719px) {
  .gb-header { padding: var(--gb-space-2) var(--gb-space-3); }
  .gb-header__top { flex-wrap: wrap; align-items: center; gap: 0 var(--gb-space-2); }
  .gb-header__titles { display: contents; }
  .gb-header__actions { flex-wrap: wrap; }
  .gb-eyebrow { flex: 0 0 100%; margin-bottom: 0; }
  .gb-title { flex: 1 1 6em; font-size: var(--gb-text-body-size); font-stretch: var(--gb-font-stretch-normal); font-weight: var(--gb-text-secondary-weight-strong); }
  .gb-about-toggle { display: inline-flex; }
  .gb-header__about[hidden] { display: none; }
  .gb-description { padding-bottom: var(--gb-space-2); }
}
@media (max-height: 699px) {
  .gb-app .gb-header { padding: var(--gb-space-2) var(--gb-space-3); }
  .gb-app .gb-header__top { flex-wrap: wrap; align-items: center; gap: 0 var(--gb-space-2); }
  .gb-app .gb-header__titles { display: contents; }
  .gb-app .gb-header__actions { flex-wrap: wrap; }
  .gb-app .gb-eyebrow { flex: 0 0 100%; margin-bottom: 0; }
  .gb-app .gb-title { flex: 1 1 6em; font-size: var(--gb-text-body-size); font-stretch: var(--gb-font-stretch-normal); font-weight: var(--gb-text-secondary-weight-strong); }
  .gb-app .gb-about-toggle { display: inline-flex; }
  .gb-app .gb-header__about[hidden] { display: none; }
  .gb-app .gb-description { padding-bottom: var(--gb-space-2); }
}

/* ---------- The first screen: header and stage ---------- */
.gb-first { display: grid; grid-template-rows: auto minmax(calc(var(--gb-space-12) * 6), 1fr); min-height: 100dvh; }
.gb-stage { position: relative; display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: minmax(max(calc(var(--gb-space-10) * 4), 11em), 1fr) auto; min-height: 0; }
.gb-view { position: relative; z-index: 3; container: gbview / size; min-height: 0; background: var(--gb-colour-map-bg); }
.gb-canvas { position: absolute; inset: 0; display: block; overflow: hidden; }
.gb-canvas:focus-visible { outline-offset: calc(var(--gb-focus-width) * -1 - var(--gb-focus-halo-width)); box-shadow: inset 0 0 0 var(--gb-focus-halo-width) var(--gb-colour-focus-halo); }
.gb-mapart { position: absolute; inset: 0; width: 100%; height: 100%; display: block; forced-color-adjust: none; }
.gb-marker { position: absolute; left: 50%; top: 50%; width: var(--gb-space-8); height: var(--gb-space-8); margin: calc(var(--gb-space-8) / -2) 0 0 calc(var(--gb-space-8) / -2); border-radius: var(--gb-radius-pill);
  border: calc(var(--gb-border-width) * 3) solid var(--gb-colour-map-sel); outline: calc(var(--gb-border-width) * 2) solid var(--gb-colour-map-halo); pointer-events: none; display: none; }
.gb-marker::after { content: ""; position: absolute; left: 50%; top: 50%; width: var(--gb-space-1); height: var(--gb-space-1); margin: calc(var(--gb-space-1) / -2); border-radius: var(--gb-radius-pill); background: var(--gb-colour-map-sel); }
.gb-canvas:focus-visible ~ .gb-marker, .gb-view[data-marker] .gb-marker { display: block; }

/* Things that sit on the map share one look: a surface with a control border. */
.gb-onmap { background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-control); }
.gb-controls { position: absolute; inset-inline-end: var(--gb-space-2); top: calc(var(--gb-space-2) * 2 + max(var(--gb-size-map-control), var(--gb-text-secondary-size) * var(--gb-text-secondary-line)) + var(--gb-border-width) * 2); display: flex; flex-direction: column; gap: var(--gb-space-2); }
.gb-controls__zoom { display: flex; flex-direction: column; }
.gb-mapbtn {
  display: inline-flex; align-items: center; justify-content: center; width: var(--gb-size-map-control); height: var(--gb-size-map-control); padding: 0;
  color: var(--gb-colour-ink); background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-control); cursor: pointer;
}
.gb-mapbtn:hover { background: var(--gb-colour-accent-soft); color: var(--gb-colour-accent-ink); }
.gb-mapbtn[aria-disabled="true"] { color: var(--gb-colour-muted); border-style: dashed; cursor: default; background: var(--gb-colour-surface); }
.gb-controls__zoom .gb-mapbtn:first-child { border-end-start-radius: 0; border-end-end-radius: 0; }
.gb-controls__zoom .gb-mapbtn:last-child { border-start-start-radius: 0; border-start-end-radius: 0; margin-top: calc(var(--gb-border-width) * -1); }
.gb-controls .gb-mapbtn:focus-visible { position: relative; z-index: 1; }

.gb-bottom { position: absolute; inset-inline: var(--gb-space-2); bottom: var(--gb-space-2); display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: var(--gb-space-2); pointer-events: none; }
.gb-bottom > * { pointer-events: auto; }
.gb-readout { justify-self: start; max-width: 100%; padding: var(--gb-space-1) var(--gb-space-2) var(--gb-space-2); border-radius: var(--gb-radius-control);
  background: color-mix(in srgb, var(--gb-colour-surface) 88%, transparent); font-size: var(--gb-text-caption-size); line-height: var(--gb-text-caption-line); color: var(--gb-colour-ink); }
.gb-scale { display: flex; align-items: center; gap: var(--gb-space-2); font-variant-numeric: var(--gb-font-numeric); }
.gb-scale__bar { width: calc(var(--gb-space-12) + var(--gb-space-6)); height: var(--gb-space-2); border: calc(var(--gb-border-width) * 2) solid var(--gb-colour-ink); border-top: 0; }
.gb-coords__of { display: block; margin-top: var(--gb-space-1); color: var(--gb-colour-ink-2); }
.gb-coords__row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--gb-space-1) var(--gb-space-2); }
.gb-coords { display: inline-flex; align-items: center; gap: var(--gb-space-2); min-height: var(--gb-size-control); padding: 0 var(--gb-space-2);
  font-variant-numeric: var(--gb-font-numeric); font-weight: var(--gb-text-caption-weight-strong); color: var(--gb-colour-ink); text-align: start; white-space: nowrap;
  background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-control); cursor: pointer; }
.gb-coords:hover { background: var(--gb-colour-accent-soft); color: var(--gb-colour-accent-ink); }
.gb-readout__copied { display: block; margin-top: var(--gb-space-1); font-weight: var(--gb-text-caption-weight-strong); color: var(--gb-colour-accent-ink); }
.gb-bottom__end { display: flex; flex-direction: column; align-items: flex-end; gap: var(--gb-space-2); }
/* The tools slot: the one place the map tools sit, at the lower right of the map, above the Layers button on a
   narrow map. Version 1.0 puts share and save as image here (D-06); version 1.1 adds more (D-08, ADR-0006).
   Empty, it takes no room. */
.gb-tools { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: var(--gb-space-2); }
.gb-tools:empty { display: none; }
.gb-tools__group { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: var(--gb-space-2); max-width: calc(var(--gb-size-map-control) * 3 + var(--gb-space-2) * 2); }      /* three to a row, so more tools make a second row and not a wider one */
.gb-mapbtn[aria-expanded="true"] { background: var(--gb-colour-accent-soft); color: var(--gb-colour-accent-ink); }
.gb-layers-open { box-shadow: var(--gb-shadow-float); }
.gb-attribution { grid-column: 1 / -1; justify-self: start; padding: 0 var(--gb-space-2); border-radius: var(--gb-radius-control);
  background: color-mix(in srgb, var(--gb-colour-surface) 88%, transparent); font-size: var(--gb-text-caption-size); line-height: var(--gb-size-target-min); color: var(--gb-colour-ink); }
.gb-attribution a { display: inline-block; min-height: var(--gb-size-target-min); margin-inline-start: var(--gb-space-2); color: var(--gb-colour-accent-ink); font-weight: var(--gb-text-caption-weight-strong); }

@container gbview (max-width: 359px) { .gb-coords .gb-icon { display: none; } }
/* When a sheet leaves the map short, the controls sit in a row and the scale, the coordinates and the tools give
   way. The credit stays, because OpenStreetMap asks for it on the map: beside the Layers button, wrapping inside its
   column, while its longest word fits there, and when even that does not (a narrow map, or larger text) in the row
   under the button, so it never covers the button and "OpenStreetMap" is never split (D-10). The credit comes first
   in the order, so that wrapping puts it lowest; it is as wide as its text and no wider. "Short" is under 320 px tall; under a narrow map, where a sheet takes the room below the map, it is
   also under 13 em tall, so the map area (never shorter than 11 em, see .gb-stage) is short at any text size. */
@container gbview (max-height: 319px) {
  .gb-controls { flex-direction: row; }
  .gb-controls__zoom { flex-direction: row; }
  .gb-controls__zoom .gb-mapbtn:first-child { border-radius: var(--gb-radius-control) 0 0 var(--gb-radius-control); }
  .gb-controls__zoom .gb-mapbtn:last-child { border-radius: 0 var(--gb-radius-control) var(--gb-radius-control) 0; margin-top: 0; margin-inline-start: calc(var(--gb-border-width) * -1); }
  .gb-readout, .gb-tools, .gb-attribution a { display: none; }
  .gb-bottom { display: flex; flex-wrap: wrap-reverse; justify-content: space-between; }
  .gb-attribution { order: -1; flex: 1 1 0; max-width: max-content; }
  .gb-bottom__end { margin-inline-start: auto; }
}
@container gbroot (max-width: 719px) {
  @container gbview (min-height: 320px) and (max-height: max(319px, 13em)) {
    .gb-controls { flex-direction: row; }
    .gb-controls__zoom { flex-direction: row; }
    .gb-controls__zoom .gb-mapbtn:first-child { border-radius: var(--gb-radius-control) 0 0 var(--gb-radius-control); }
    .gb-controls__zoom .gb-mapbtn:last-child { border-radius: 0 var(--gb-radius-control) var(--gb-radius-control) 0; margin-top: 0; margin-inline-start: calc(var(--gb-border-width) * -1); }
    .gb-readout, .gb-tools, .gb-attribution a { display: none; }
    .gb-bottom { display: flex; flex-wrap: wrap-reverse; justify-content: space-between; }
    .gb-attribution { order: -1; flex: 1 1 0; max-width: max-content; }
    .gb-bottom__end { margin-inline-start: auto; }
  }
}
/* When the readout and the Layers button do not fit side by side, the readout takes the row above them and the
   tools and the Layers button sit below it, at the right (D-06, from the review of D-05: with text at 200% the
   Layers button covered the end of the coordinates). The width is in em, so it follows the text size: at the
   default size only a map under about 308 px stacks, and larger text stacks the readout in a wider map. The
   readout stops short of the controls column, and its coordinates may wrap. */
@container gbview (max-width: 20.5em) and (min-height: 320px) {
  .gb-bottom { grid-template-columns: minmax(0, 1fr); }
  .gb-readout { max-width: calc(100% - var(--gb-size-map-control) - var(--gb-space-2)); }
  .gb-coords { white-space: normal; }
  .gb-bottom__end { justify-self: end; }
}

/* ---------- Find ---------- */
.gb-find { position: absolute; inset-inline: var(--gb-space-2); top: var(--gb-space-2); z-index: 3; }
.gb-find__field { display: flex; align-items: center; gap: var(--gb-space-2); padding-inline-start: var(--gb-space-3); background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-control); }
.gb-find__field:has(.gb-find__input:focus-visible) { outline: var(--gb-focus-outline); outline-offset: var(--gb-focus-offset); box-shadow: var(--gb-focus-halo); }
.gb-find__label { display: inline-flex; align-items: center; gap: var(--gb-space-2); font-size: var(--gb-text-secondary-size); font-weight: var(--gb-text-secondary-weight-strong); color: var(--gb-colour-ink); }
.gb-find__input { flex: 1; min-width: 0; min-height: var(--gb-size-map-control); padding: 0; border: 0; background: transparent; font-size: var(--gb-text-secondary-size); color: var(--gb-colour-ink); }
.gb-root .gb-find__input:focus-visible { outline: none; box-shadow: none; }
.gb-find__input::placeholder { color: var(--gb-colour-muted); opacity: 1; }
.gb-find__clear { width: var(--gb-size-map-control); height: var(--gb-size-map-control); }
.gb-find__pop { margin-top: var(--gb-space-1); background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-panel); box-shadow: var(--gb-shadow-float); }
.gb-find__list { padding: var(--gb-space-1) 0; }
.gb-find__group { padding: var(--gb-space-2) var(--gb-space-3) var(--gb-space-1); }
.gb-find__option { display: block; min-height: var(--gb-size-control); padding: var(--gb-space-2) var(--gb-space-3); border-inline-start: var(--gb-space-1) solid transparent; cursor: pointer; font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-secondary-line); }
.gb-find__option small { display: block; font-size: var(--gb-text-caption-size); color: var(--gb-colour-ink-2); }
.gb-find__option:hover { background: var(--gb-colour-sunk); }
.gb-find__option[aria-selected="true"] { background: var(--gb-colour-accent-soft); color: var(--gb-colour-accent-ink); border-inline-start-color: var(--gb-colour-accent); font-weight: var(--gb-text-secondary-weight-strong); }
.gb-find__option[aria-selected="true"] small { color: var(--gb-colour-accent-ink); font-weight: var(--gb-text-caption-weight); }
.gb-find__message { padding: var(--gb-space-3); font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-secondary-line); }
.gb-find__message--error { border-inline-start: var(--gb-space-1) solid var(--gb-colour-warn); color: var(--gb-colour-ink); }

/* ---------- Sheets and the layer panel ---------- */
.gb-sheet { grid-column: 1; grid-row: 2; min-height: 0; max-height: 56dvh; overflow: auto; overscroll-behavior: contain;
  background: var(--gb-colour-surface); border-top: var(--gb-border-width) solid var(--gb-colour-border-control); }
.gb-sheet__head { position: sticky; top: 0; z-index: 2; display: flex; align-items: center; gap: var(--gb-space-2); padding: var(--gb-space-2) var(--gb-space-2) var(--gb-space-2) var(--gb-space-4); background: var(--gb-colour-surface); border-bottom: var(--gb-border-width) solid var(--gb-colour-line); }
.gb-sheet__head .gb-h2 { flex: 1; min-width: 0; }

.gb-layers__tools { display: flex; flex-wrap: wrap; gap: var(--gb-space-2); padding: var(--gb-space-3) var(--gb-space-4) 0; }
.gb-layers__order-note { padding: var(--gb-space-2) var(--gb-space-4) 0; font-size: var(--gb-text-caption-size); line-height: var(--gb-text-caption-line); color: var(--gb-colour-ink-2); }
.gb-layers .gb-label { padding: var(--gb-space-4) var(--gb-space-4) var(--gb-space-1); }
.gb-layerlist { padding: 0 var(--gb-space-2); }
.gb-layerlist:last-child { padding-bottom: var(--gb-space-3); }
.gb-layer { border-bottom: var(--gb-border-width) solid var(--gb-colour-line); background: var(--gb-colour-surface); }
.gb-layer:last-child { border-bottom: 0; }
.gb-layer[data-dragging] { position: relative; z-index: 1; box-shadow: var(--gb-shadow-float); border-radius: var(--gb-radius-control); border-bottom-color: transparent; }
.gb-layer__row { display: flex; align-items: center; gap: var(--gb-space-1); min-height: var(--gb-size-control); padding: var(--gb-space-1) 0; }
.gb-layer__label { flex: 1; min-width: 0; display: flex; align-items: center; gap: var(--gb-space-2); min-height: var(--gb-size-control); cursor: pointer; }
.gb-layer__text { flex: 1; min-width: 0; padding: var(--gb-space-1) 0; }
.gb-layer__name { display: block; font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-secondary-line); overflow-wrap: anywhere; }
.gb-layer__count, .gb-layer__note { display: block; font-size: var(--gb-text-caption-size); line-height: var(--gb-text-caption-line); color: var(--gb-colour-ink-2); font-variant-numeric: var(--gb-font-numeric); }
.gb-layer__meta { padding: 0 var(--gb-space-2) var(--gb-space-2) calc(var(--gb-size-control) + var(--gb-size-swatch-width) + var(--gb-space-2) * 2); }
.gb-layer__handle { cursor: grab; touch-action: none; }
.gb-layer__info, .gb-layer__move { margin: 0 var(--gb-space-2) var(--gb-space-3) calc(var(--gb-size-control) + var(--gb-space-2)); padding: var(--gb-space-3); background: var(--gb-colour-sunk); border-radius: var(--gb-radius-control); font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-body-line); }
.gb-layer__move { display: flex; flex-wrap: wrap; gap: var(--gb-space-2); }
.gb-layer__info p + p { margin-top: var(--gb-space-2); }

/* The checkbox is as large as a control; the box and the tick are drawn inside it. */
.gb-check { appearance: none; -webkit-appearance: none; position: relative; flex: none; width: var(--gb-size-control); height: var(--gb-size-control); margin: 0; background: transparent; border: 0; cursor: pointer; }
.gb-check::before { content: ""; position: absolute; inset: calc((var(--gb-size-control) - var(--gb-size-checkbox)) / 2); background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-space-1); }
.gb-check:checked::before { background: var(--gb-colour-accent); border-color: var(--gb-colour-accent); }
.gb-check:checked::after { content: ""; position: absolute; inset: calc((var(--gb-size-control) - var(--gb-size-checkbox)) / 2 + var(--gb-space-1)); background: var(--gb-colour-on-accent); clip-path: polygon(8% 52%, 22% 38%, 40% 58%, 78% 16%, 92% 30%, 40% 88%); }
.gb-root .gb-check:focus-visible { outline: none; box-shadow: none; }
.gb-check:focus-visible::before { outline: var(--gb-focus-outline); outline-offset: var(--gb-focus-offset); box-shadow: var(--gb-focus-halo); }
@media (forced-colors: active) {
  .gb-check::before { border-color: ButtonText; background: Canvas; }
  .gb-check:checked::before { background: Highlight; border-color: Highlight; }
  .gb-check:checked::after { background: HighlightText; }
  .gb-pill[aria-pressed="true"], .gb-pills input:checked + .gb-pill, .gb-find__option[aria-selected="true"] { outline: calc(var(--gb-border-width) * 2) solid Highlight; }
}
.gb-swatch { flex: none; width: var(--gb-size-swatch-width); height: var(--gb-size-swatch-height); overflow: visible; forced-color-adjust: none; }
.gb-swatch rect, .gb-swatch line { stroke-width: 1.5; vector-effect: non-scaling-stroke; }

/* ---------- What is here: a sheet when narrow, a pop-up when wide ---------- */
.gb-card { font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-secondary-line); }
.gb-card__pointer { display: none; }
.gb-card__at { padding: var(--gb-space-2) var(--gb-space-4) 0; font-size: var(--gb-text-caption-size); color: var(--gb-colour-ink-2); font-variant-numeric: var(--gb-font-numeric); }
.gb-card__count { padding: var(--gb-space-1) var(--gb-space-4) 0; }
.gb-card__body { padding: 0 var(--gb-space-4) var(--gb-space-2); }
.gb-card__group { padding: var(--gb-space-3) 0; border-bottom: var(--gb-border-width) solid var(--gb-colour-line); }
.gb-card__group > .gb-label { margin-bottom: var(--gb-space-2); }
.gb-feature { padding-inline-start: var(--gb-space-3); border-inline-start: var(--gb-space-1) solid var(--gb-colour-line-2); }
.gb-feature + .gb-feature { margin-top: var(--gb-space-3); }
.gb-feature--selected { border-inline-start-color: var(--gb-colour-map-sel); }
.gb-feature__title { font-size: var(--gb-text-body-size); font-weight: var(--gb-text-secondary-weight-strong); line-height: var(--gb-text-title-line); overflow-wrap: anywhere; }
.gb-feature__outlined { display: flex; align-items: center; gap: var(--gb-space-1); margin-top: var(--gb-space-1); font-size: var(--gb-text-caption-size); font-weight: var(--gb-text-caption-weight-strong); color: var(--gb-colour-ink); }
.gb-feature__outlined::before { content: ""; flex: none; width: var(--gb-size-swatch-width); height: var(--gb-size-swatch-height); border: calc(var(--gb-border-width) * 3) solid var(--gb-colour-map-sel); border-radius: calc(var(--gb-space-1) / 2); }
.gb-feature .gb-btn { margin-top: var(--gb-space-2); }
.gb-rows > div { margin-top: var(--gb-space-2); }
.gb-rows dt { font-size: var(--gb-text-caption-size); line-height: var(--gb-text-caption-line); color: var(--gb-colour-ink-2); }
.gb-rows dd { font-variant-numeric: var(--gb-font-numeric); overflow-wrap: anywhere; }
.gb-rows__note { display: block; font-size: var(--gb-text-caption-size); line-height: var(--gb-text-caption-line); color: var(--gb-colour-ink-2); }
.gb-card__also { margin-top: var(--gb-space-3); font-size: var(--gb-text-caption-size); font-weight: var(--gb-text-caption-weight-strong); color: var(--gb-colour-ink-2); }
.gb-also li { margin-top: var(--gb-space-1); }
.gb-also small { display: block; font-size: var(--gb-text-caption-size); color: var(--gb-colour-ink-2); }
.gb-linkbtn { display: inline-flex; align-items: center; min-height: var(--gb-size-control); margin-top: var(--gb-space-1); padding: 0 var(--gb-space-1); background: transparent; border: 0; border-radius: var(--gb-radius-control); color: var(--gb-colour-accent); font-size: var(--gb-text-secondary-size); font-weight: var(--gb-text-caption-weight-strong); text-decoration: underline; text-underline-offset: 0.15em; cursor: pointer; }
.gb-card__source { margin-top: var(--gb-space-2); font-size: var(--gb-text-caption-size); line-height: var(--gb-text-caption-line); color: var(--gb-colour-ink-2); }
.gb-card__muni { padding: var(--gb-space-1) 0 var(--gb-space-2); }
.gb-card__message { padding: var(--gb-space-3) var(--gb-space-4); }
.gb-card__foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--gb-space-2); padding: var(--gb-space-2) var(--gb-space-4) var(--gb-space-4); }
.gb-card__foot a { font-size: var(--gb-text-caption-size); }

.gb-progress { display: grid; gap: var(--gb-space-2); padding: var(--gb-space-3) var(--gb-space-4); }
.gb-progress__bar { appearance: none; -webkit-appearance: none; display: block; width: 100%; height: var(--gb-space-2); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-pill); overflow: hidden;
  background: linear-gradient(90deg, var(--gb-colour-accent) 0 40%, var(--gb-colour-surface) 40% 100%); background-size: 250% 100%; background-position: 100% 0; animation: gb-progress calc(var(--gb-motion-slow) * 5) linear infinite; }
/* One rule for each engine: a browser drops a whole rule when it does not know one of its selectors. */
.gb-progress__bar::-webkit-progress-bar { background: transparent; }
.gb-progress__bar::-webkit-progress-value { background: transparent; }
.gb-progress__bar::-moz-progress-bar { background: transparent; }
@keyframes gb-progress { from { background-position: 100% 0; } to { background-position: -66% 0; } }
@media (prefers-reduced-motion: reduce) {
  .gb-progress__bar { animation: none; background: repeating-linear-gradient(90deg, var(--gb-colour-accent) 0 var(--gb-space-2), var(--gb-colour-surface) var(--gb-space-2) var(--gb-space-4)); }
}
:root[data-motion="reduce"] .gb-progress__bar { animation: none; background: repeating-linear-gradient(90deg, var(--gb-colour-accent) 0 var(--gb-space-2), var(--gb-colour-surface) var(--gb-space-2) var(--gb-space-4)); }

/* ---------- Loading, error and no-WebGL2 states ---------- */
.gb-view__picture { position: absolute; inset: 0; width: 100%; height: 100%; overflow: hidden; }
.gb-view__picture--soft .gb-mapart { filter: blur(var(--gb-space-1)); transform: scale(1.03); }
.gb-status { position: absolute; inset-inline: var(--gb-space-3); bottom: var(--gb-space-3); max-width: var(--gb-size-popup-max-width); margin-inline: auto;
  background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-panel); box-shadow: var(--gb-shadow-float);
  font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-secondary-line); }
.gb-status__body { padding: var(--gb-space-3) var(--gb-space-4); display: grid; gap: var(--gb-space-3); justify-items: start; }
.gb-status--error { border-inline-start: var(--gb-space-1) solid var(--gb-colour-warn); }

/* ---------- Share and save as image (D-06): the two tools' panels ---------- */
.gb-tool__body { display: grid; gap: var(--gb-space-3); padding: var(--gb-space-3) var(--gb-space-4) var(--gb-space-4); font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-secondary-line); }
.gb-tool__body > * { min-width: 0; }
.gb-tool__actions { display: flex; flex-wrap: wrap; gap: var(--gb-space-2); }
.gb-tool__actions:not(:has(:not([hidden]))) { display: none; }
.gb-tool__message { padding: var(--gb-space-2) var(--gb-space-3); background: var(--gb-colour-sunk); border: var(--gb-border-width) solid var(--gb-colour-line-2); border-inline-start: var(--gb-space-1) solid var(--gb-colour-accent); border-radius: var(--gb-radius-control); }
.gb-tool__message--warn { border-inline-start-color: var(--gb-colour-warn); }
.gb-tool__progress { padding: 0; }
.gb-linkbox { display: grid; gap: var(--gb-space-1); }
.gb-linkbox label { font-size: var(--gb-text-caption-size); line-height: var(--gb-text-caption-line); color: var(--gb-colour-ink-2); }
.gb-linkbox__field { width: 100%; height: calc(var(--gb-text-secondary-size) * var(--gb-text-secondary-line) * 3 + var(--gb-space-2) + var(--gb-border-width) * 2); padding: var(--gb-space-2) var(--gb-space-3) 0; resize: none; font: inherit; font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-secondary-line);
  color: var(--gb-colour-ink); background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-control); overflow-wrap: anywhere; }
.gb-saved { display: grid; gap: var(--gb-space-2); }
.gb-saved figcaption { font-size: var(--gb-text-caption-size); line-height: var(--gb-text-caption-line); color: var(--gb-colour-ink-2); }
.gb-saved__picture { position: relative; height: calc(var(--gb-space-12) * 3); overflow: hidden; background: var(--gb-colour-map-bg); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-control); }

/* The saved image, drawn as a design specimen: the map, and under it a band with the title and date, the legend, the scale and the credits. */
.gb-picture { width: 100%; color: var(--gb-colour-ink); background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); }
.gb-picture__map { position: relative; height: calc(var(--gb-space-12) * 5); overflow: hidden; background: var(--gb-colour-map-bg); }
.gb-picture__band { display: grid; gap: var(--gb-space-3); padding: var(--gb-space-3); border-top: var(--gb-border-width) solid var(--gb-colour-line-2); font-size: var(--gb-text-caption-size); line-height: var(--gb-text-caption-line); }
.gb-picture__head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--gb-space-1) var(--gb-space-3); }
.gb-picture__title { font-size: var(--gb-text-body-size); font-weight: var(--gb-text-secondary-weight-strong); }
.gb-picture__cols { display: grid; gap: var(--gb-space-3); }
.gb-picture--wide .gb-picture__cols { grid-template-columns: repeat(auto-fit, minmax(min(100%, calc(var(--gb-space-12) * 5)), 1fr)); gap: var(--gb-space-5); }
.gb-picture__legend { margin: var(--gb-space-1) 0 var(--gb-space-2); }
.gb-picture__legend li { display: flex; align-items: center; gap: var(--gb-space-2); }
.gb-picture__legend li + li { margin-top: var(--gb-space-1); }
.gb-picture__credits { margin-top: var(--gb-space-1); }
.gb-picture__credits li + li { margin-top: var(--gb-space-1); }

/* ---------- Dialog ---------- */
.gb-dialog { width: min(100% - var(--gb-space-6), var(--gb-size-popup-max-width) + var(--gb-space-12)); max-height: calc(100dvh - var(--gb-space-6)); padding: 0; overflow: auto;
  color: var(--gb-colour-ink); background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-panel); box-shadow: var(--gb-shadow-float);
  font-family: var(--gb-font-sans); font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-secondary-line); }
.gb-dialog::backdrop { background: color-mix(in srgb, var(--gb-colour-ink) 45%, transparent); }
.gb-dialog--static { position: static; display: block; margin: 0; width: auto; max-width: calc(var(--gb-size-popup-max-width) + var(--gb-space-12)); }
.gb-dialog__body { padding: var(--gb-space-3) var(--gb-space-4) var(--gb-space-4); }
.gb-keys { width: 100%; margin-top: var(--gb-space-3); border-collapse: collapse; }
.gb-keys th, .gb-keys td { padding: var(--gb-space-2) var(--gb-space-2) var(--gb-space-2) 0; text-align: start; vertical-align: top; border-top: var(--gb-border-width) solid var(--gb-colour-line); font-weight: var(--gb-text-secondary-weight); }
.gb-keys thead th { border-top: 0; font-size: var(--gb-text-caption-size); color: var(--gb-colour-ink-2); }
.gb-keys kbd { display: inline-block; padding: 0 var(--gb-space-2); font: inherit; font-weight: var(--gb-text-secondary-weight-strong); white-space: nowrap; background: var(--gb-colour-sunk); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-space-1); }

/* ---------- Sections under the map: sources, text version ---------- */
.gb-section { padding: var(--gb-space-6) var(--gb-space-4); background: var(--gb-colour-surface); border-top: var(--gb-border-width) solid var(--gb-colour-line-2); }
.gb-section > .gb-h2 { font-size: calc(var(--gb-text-body-size) * 1.2); margin-bottom: var(--gb-space-2); }
.gb-section > .gb-label { margin: var(--gb-space-5) 0 var(--gb-space-2); }
.gb-section > p { color: var(--gb-colour-ink-2); }
.gb-folds { border: var(--gb-border-width) solid var(--gb-colour-line-2); border-radius: var(--gb-radius-panel); overflow: clip; }
.gb-fold + .gb-fold { border-top: var(--gb-border-width) solid var(--gb-colour-line-2); }
.gb-fold__btn { display: flex; align-items: center; gap: var(--gb-space-2); width: 100%; min-height: var(--gb-size-control); padding: var(--gb-space-2) var(--gb-space-3); text-align: start;
  font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-secondary-line); font-weight: var(--gb-text-secondary-weight-strong); background: transparent; border: 0; cursor: pointer; }
.gb-fold__btn:hover { background: var(--gb-colour-sunk); }
.gb-fold__btn:focus-visible { outline-offset: calc(var(--gb-focus-width) * -1); box-shadow: inset 0 0 0 calc(var(--gb-focus-width) + var(--gb-focus-halo-width)) var(--gb-colour-focus-halo); }
.gb-fold__name { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.gb-fold__body { padding: 0 var(--gb-space-3) var(--gb-space-4) calc(var(--gb-space-3) + var(--gb-size-icon) + var(--gb-space-2)); font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-body-line); }
.gb-fold__body .gb-rows { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, calc(var(--gb-space-12) * 4)), 1fr)); gap: 0 var(--gb-space-5); }
.gb-fold__body .gb-rows a { display: inline-block; min-height: var(--gb-size-target-min); overflow-wrap: anywhere; }
.gb-fold__body > p { margin-top: var(--gb-space-3); }
.gb-licences li + li { margin-top: var(--gb-space-1); }
.gb-prose p, .gb-prose ul { margin-top: var(--gb-space-2); }
.gb-prose ul { list-style: disc; padding-inline-start: var(--gb-space-5); }
.gb-prose li + li { margin-top: var(--gb-space-2); }
.gb-credits li { margin-top: var(--gb-space-2); font-size: var(--gb-text-secondary-size); overflow-wrap: break-word; }
.gb-formats { margin-top: var(--gb-space-2); }

.gb-text__summary { margin-top: var(--gb-space-3); color: var(--gb-colour-ink); font-weight: var(--gb-text-caption-weight-strong); }
.gb-inview li { font-size: var(--gb-text-secondary-size); font-variant-numeric: var(--gb-font-numeric); }
.gb-tabletools { display: flex; flex-wrap: wrap; align-items: flex-end; gap: var(--gb-space-3) var(--gb-space-5); margin-top: var(--gb-space-5); }
.gb-field { display: grid; gap: var(--gb-space-1); flex: 1 1 calc(var(--gb-space-12) * 4); max-width: calc(var(--gb-space-12) * 8); }
.gb-field label { font-size: var(--gb-text-caption-size); color: var(--gb-colour-ink-2); }
.gb-input { min-height: var(--gb-size-control); width: 100%; padding: 0 var(--gb-space-3); font-size: var(--gb-text-secondary-size); color: var(--gb-colour-ink); background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-control); }
.gb-text__count { margin-top: var(--gb-space-3); font-size: var(--gb-text-secondary-size); font-variant-numeric: var(--gb-font-numeric); }
.gb-table { width: 100%; margin-top: var(--gb-space-2); border-collapse: collapse; font-size: var(--gb-text-secondary-size); line-height: var(--gb-text-secondary-line); }
.gb-table caption { padding-bottom: var(--gb-space-2); text-align: start; font-size: var(--gb-text-body-size); font-weight: var(--gb-text-secondary-weight-strong); color: var(--gb-colour-ink); }
.gb-table__note { display: block; margin-top: var(--gb-space-1); font-size: var(--gb-text-secondary-size); font-weight: var(--gb-text-secondary-weight); color: var(--gb-colour-ink-2); }
.gb-table th, .gb-table td { padding: var(--gb-space-2) var(--gb-space-3); text-align: start; vertical-align: top; border-bottom: var(--gb-border-width) solid var(--gb-colour-line); font-weight: var(--gb-text-secondary-weight); overflow-wrap: anywhere; }
.gb-table thead th { background: var(--gb-colour-sunk); font-size: var(--gb-text-caption-size); font-weight: var(--gb-text-caption-weight-strong); color: var(--gb-colour-ink-2); border-bottom-color: var(--gb-colour-line-2); }
.gb-table tbody th { font-weight: var(--gb-text-secondary-weight-strong); }
.gb-table .gb-num { text-align: end; font-variant-numeric: var(--gb-font-numeric); }
.gb-table__label { display: none; }
.gb-pager { display: flex; flex-wrap: wrap; align-items: center; gap: var(--gb-space-3); margin-top: var(--gb-space-4); font-size: var(--gb-text-secondary-size); font-variant-numeric: var(--gb-font-numeric); }
.gb-text__back { margin-top: var(--gb-space-4); }

/* A narrow table lists each feature as a block, so nothing scrolls sideways (G-13). The roles in the markup keep
   it a table for a screen reader. */
@container gbroot (max-width: 719px) {
  .gb-table, .gb-table tbody, .gb-table tr, .gb-table th, .gb-table td, .gb-table caption { display: block; }
  .gb-table thead { position: absolute; width: var(--gb-border-width); height: var(--gb-border-width); overflow: hidden; clip-path: inset(50%); }
  .gb-table tr { padding: var(--gb-space-3) 0; border-bottom: var(--gb-border-width) solid var(--gb-colour-line-2); }
  .gb-table th, .gb-table td { padding: var(--gb-space-1) 0; border: 0; }
  .gb-table .gb-num { text-align: start; }
  .gb-table tbody th { font-size: var(--gb-text-body-size); }
  .gb-table td .gb-table__label { display: inline; color: var(--gb-colour-ink-2); font-size: var(--gb-text-caption-size); }
  .gb-table td .gb-table__label::after { content: ": "; }
  .gb-table .gb-table__cell--empty { display: none; }
  .gb-pager__count { flex: 0 0 100%; }
}

/* ---------- Wide: the panel beside the map, and the pop-up ---------- */
@container gbroot (min-width: 720px) {
  .gb-stage { grid-template-columns: minmax(0, 1fr) var(--gb-size-panel-width); grid-template-rows: minmax(0, 1fr); }
  .gb-find { inset-inline-end: auto; width: min(var(--gb-size-popup-max-width), 100% - var(--gb-space-4) - var(--gb-size-map-control) - var(--gb-space-2)); }
  .gb-controls { top: var(--gb-space-2); }
  .gb-layers-open, .gb-layers .gb-sheet__close { display: none; }
  .gb-layers.gb-sheet { grid-column: 2; grid-row: 1; max-height: none; contain: size; border-top: 0; border-inline-start: var(--gb-border-width) solid var(--gb-colour-border-control); }
  .gb-layers.gb-sheet[hidden] { display: block; }
  .gb-stage > .gb-view:only-child { grid-column: 1 / -1; }
  .gb-card.gb-sheet { position: absolute; grid-area: auto; z-index: 4; left: var(--gb-popup-left, var(--gb-space-2)); top: var(--gb-popup-top, calc(var(--gb-space-4) + var(--gb-size-map-control) + var(--gb-border-width) * 2));
    width: var(--gb-popup-width, var(--gb-size-popup-max-width)); max-width: var(--gb-size-popup-max-width); max-height: var(--gb-popup-max-height, 50%);
    border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-panel); box-shadow: var(--gb-shadow-float); }
  .gb-card__pointer { display: block; position: absolute; z-index: 3; left: var(--gb-pointer-left, 0); top: var(--gb-pointer-top, 0); width: var(--gb-space-4); height: var(--gb-space-4); margin: calc(var(--gb-space-2) * -1) 0 0 calc(var(--gb-space-2) * -1);
    transform: rotate(45deg); background: var(--gb-colour-surface); border: var(--gb-border-width) solid var(--gb-colour-border-control); pointer-events: none; }
  .gb-card[hidden] + .gb-card__pointer { display: none; }
  .gb-card.gb-sheet .gb-sheet__head { border-start-start-radius: var(--gb-radius-panel); border-start-end-radius: var(--gb-radius-panel); }
  .gb-section { padding: var(--gb-space-8) var(--gb-space-6); }
}
/* Beside a wide map a tool's panel floats over the lower right of the map, above the tools and to the left of the
   controls column, so it covers neither. The script sets --gb-tool-bottom and --gb-tool-max-height from where the
   tools are; the values here are the fallback. */
@container gbroot (min-width: 720px) {
  .gb-tool.gb-sheet { position: absolute; grid-area: auto; z-index: 4; inset-inline-end: calc(var(--gb-size-panel-width) + var(--gb-space-4) + var(--gb-size-map-control));
    bottom: var(--gb-tool-bottom, calc(var(--gb-space-12) * 2)); max-height: var(--gb-tool-max-height, 50%);
    width: min(var(--gb-size-popup-max-width), 100% - var(--gb-size-panel-width) - var(--gb-space-6) - var(--gb-size-map-control));
    border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-panel); box-shadow: var(--gb-shadow-float); }
  .gb-tool.gb-sheet .gb-sheet__head { border-start-start-radius: var(--gb-radius-panel); border-start-end-radius: var(--gb-radius-panel); }
}
/* A specimen in the gallery shows a pop-up or a panel on its own, outside a stage. */
.gb-card--static.gb-sheet, .gb-layers--static.gb-sheet { position: static; transform: none; max-height: none; contain: none; width: auto; max-width: var(--gb-size-popup-max-width);
  border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-panel); }
.gb-card--static.gb-sheet { box-shadow: var(--gb-shadow-float); }
.gb-tool--static.gb-sheet { position: static; transform: none; max-height: none; width: auto; max-width: var(--gb-size-popup-max-width);
  border: var(--gb-border-width) solid var(--gb-colour-border-control); border-radius: var(--gb-radius-panel); box-shadow: var(--gb-shadow-float); }
.gb-tool--static .gb-sheet__head { border-start-start-radius: var(--gb-radius-panel); border-start-end-radius: var(--gb-radius-panel); }
.gb-card--static .gb-sheet__head, .gb-layers--static .gb-sheet__head { border-start-start-radius: var(--gb-radius-panel); border-start-end-radius: var(--gb-radius-panel); }
.gb-find--static, .gb-controls--static, .gb-bottom--static { position: static; }
.gb-find--static { max-width: var(--gb-size-popup-max-width); }
.gb-controls--static { width: max-content; }
.gb-status--static { position: static; margin-inline: 0; }

/* ---------- The summary on the host page (C13). It takes the host's own type and colours. ---------- */
.greenbelt-map { margin: 0; }
.greenbelt-map iframe { display: block; width: 100%; border: 0; }
.greenbelt-map figcaption > * { margin: 0.5em 0 0; }