/* Shared page chrome: the toolbar at the top right (.topbar > .toolbar.app-tools), its dropdowns and the
   help panel. The building viewer loads it before main.css, the gallery loads it directly, and
   make_viewer.py inlines it into the splat viewers. Theme and scale values live in token.css. */

/* Base for pages without main.css (the gallery and the splat viewers); main.css sets the same globally. */
:where(.topbar, .dropdown, .loading-card), :where(.topbar, .dropdown, .loading-card) * {
  box-sizing: border-box;
}
:where(.topbar, .dropdown) {
  font-family: var(--font-family);
  line-height: var(--leading-normal);
}
:where(.topbar, .dropdown) :where(button, input) {
  font: inherit;
  color: inherit;
}
:where(.topbar, .dropdown) button {
  cursor: pointer;
}
:where(.topbar, .dropdown) svg {
  width: var(--icon-size);
  height: var(--icon-size);
  fill: none;
  stroke: currentColor;
  stroke-width: var(--icon-stroke);
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}
:where(.topbar, .dropdown) :is(button, a, input):focus-visible {
  outline: var(--focus-width) solid var(--color-focus);
  outline-offset: var(--focus-offset);
}
:where(.topbar, .dropdown) button:focus:not(:focus-visible) {
  outline: none;
}
:where(.topbar, .dropdown)[hidden], :where(.topbar, .dropdown) [hidden] {
  display: none !important;
}

/* Shared building blocks. */
.icon-library {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: calc(-1 * var(--space-px));
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}
kbd {
  display: inline-block;
  min-width: 18px;
  padding: 0 var(--space-1);
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-overlay-hover);
  color: var(--color-text);
  font: var(--text-2xs) var(--font-family);
  text-align: center;
}
.eyebrow {
  display: block;
  margin: 0 0 10px;
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.panel-note {
  margin: var(--space-1) 0 var(--space-half);
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
  color: var(--color-text-muted);
}

/* Top bar at the top right of every page: links, language, help and, in the viewer, More.
   The viewer also centres its scene settings in it. */
.topbar {
  position: absolute;
  z-index: 2;
  top: var(--inset-top);
  left: var(--inset-left);
  right: var(--inset-right);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: var(--space-2);
  pointer-events: none;
}
.topbar > * {
  pointer-events: auto;
}
.app-tools {
  grid-column: 3;
  justify-self: end;
}
.toolbar {
  border: var(--border-width) solid var(--color-border);
  background: var(--color-overlay-soft);
  box-shadow: var(--shadow-dock);
  backdrop-filter: blur(var(--blur-panel));
  display: flex;
  align-items: center;
  gap: var(--space-half);
  padding: var(--space-1);
  border-radius: var(--radius-toolbar);
}
.toolbar-link {
  color: inherit;
  text-decoration: none;
}
.language-code {
  font-size: var(--text-sm);
  letter-spacing: .04em;
}
.language-menu .menu-options {
  padding: 0;
}
.toolbar-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--control-size-compact);
  padding: 0 var(--space-3) 0 10px;
  border: 0;
  border-radius: var(--radius-inner);
  background: transparent;
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  white-space: nowrap;
}
.toolbar-button.icon-only {
  justify-content: center;
  width: var(--control-size-compact);
  height: var(--control-size-compact);
  padding: 0;
}
.toolbar-button:hover:not(:disabled) {
  background: var(--color-overlay-pressed);
}
.toolbar-button[aria-expanded=true] {
  background: var(--color-surface-hover);
}
.toolbar-divider {
  width: 1px;
  height: 22px;
  margin: 0 var(--space-1);
  background: var(--color-border);
}

/* Dropdowns are native popovers; layout uses block flow so the UA can hide them. */
.dropdown {
  position: fixed;
  inset: auto;
  z-index: var(--layer-popover);
  left: var(--dropdown-left, 16px);
  top: var(--dropdown-top, 80px);
  width: var(--dropdown-width, var(--dropdown-lighting));
  max-height: var(--dropdown-maxHeight, calc(100dvh - 96px));
  margin: 0;
  padding: var(--space-4);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  color: inherit;
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--radius-dropdown);
  background: var(--color-overlay-panel);
  backdrop-filter: blur(var(--blur-panel));
  box-shadow: var(--shadow-panel);
  overflow-wrap: anywhere;
}
.dropdown::backdrop {
  background: transparent;
}
.help-panel {
  padding: var(--space-1) 0 var(--space-2);
}
.menu {
  padding: var(--space-1h);
}

/* Help panel: optional tabs, then eyebrow headings, guides, notes and link buttons. */
.segmented {
  display: flex;
  gap: var(--space-half);
  margin: var(--space-2) var(--space-3) 0;
  padding: 3px;
  border: var(--border-width) solid var(--color-border);
  border-radius: var(--radius-inner);
  background: var(--color-overlay-hover);
}
.segmented [role=tab] {
  flex: 1;
  min-height: 32px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
}
.segmented [aria-selected=true] {
  background: var(--color-surface-raised);
  color: var(--color-text);
}
.help-body {
  padding: var(--space-3) var(--space-4) var(--space-1);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--color-text-secondary);
}
.help-body .eyebrow {
  margin: var(--space-4) 0 10px;
}
.help-body .eyebrow:first-child {
  margin-top: 0;
}
.guide {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: var(--space-1h) var(--space-3);
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.45;
}
.guide dt {
  font-weight: var(--weight-semibold);
  color: var(--color-text);
}
.guide dd {
  margin: 0;
  color: var(--color-text-secondary);
}
.help-body > .panel-note {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}
/* A note right under a heading sits as close as a guide does. */
.help-body > .eyebrow + .panel-note {
  margin-top: 0;
}
.about-body h3 {
  margin: 0 0 var(--space-1h);
  font-size: var(--text-sm);
  color: var(--color-text);
}
.about-body .panel-note {
  margin: 0 0 10px;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}
.about-body a:not(.link-button) {
  color: var(--color-text);
}
.about-facts {
  margin-top: var(--space-3);
}
.about-facts dt {
  font-weight: var(--weight-normal);
  color: var(--color-text-muted);
}
.about-facts dd {
  color: var(--color-text);
}
.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1h);
  margin-top: 14px;
}
.link-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1h);
  min-height: 34px;
  padding: 0 10px;
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: var(--text-sm);
  text-decoration: none;
}
.link-button:hover {
  background: var(--color-overlay-pressed);
}
.link-button svg {
  width: 12px;
  height: 12px;
}

/* Menus: radio options (language, and in the viewer quality). */
.menu-options {
  display: grid;
  gap: var(--space-half);
  padding: 0 0 var(--space-1) 34px;
}
.menu-options label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 34px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  cursor: pointer;
}
.menu-options label:hover {
  background: var(--color-overlay-hover);
}
.menu-options input {
  margin: 0;
  accent-color: var(--color-text);
}

/* Phones: an icon-only toolbar with the language code in place of the globe, and one-column help.
   The same breakpoint as the viewer's compact layout. */
@media (max-width: 760px) {
  .toolbar {
    padding: 3px;
    border-radius: var(--radius-control);
  }
  .toolbar-button {
    justify-content: center;
    width: var(--control-size-compact);
    height: var(--control-size-compact);
    padding: 0;
    border-radius: 9px;
  }
  .toolbar-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }
  .toolbar-divider, .language-toggle > svg {
    display: none;
  }
  .guide {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }
  .guide dt:not(:first-child) {
    margin-top: var(--space-2);
  }
}

/* Loading card, centred over the view while a building or splat opens: the viewer and the splat overlay share it. */
.loading-card {
  position: absolute;
  z-index: var(--layer-loading);
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(370px, calc(100% - var(--inset-left) - var(--inset-right)));
  max-height: calc(100% - 200px);
  overflow-y: auto;
  padding: var(--space-7);
  border: var(--border-width) solid var(--color-border-strong);
  border-radius: var(--radius-panel);
  background: var(--color-overlay-panel);
  -webkit-backdrop-filter: blur(var(--blur-panel));
  backdrop-filter: blur(var(--blur-panel));
  box-shadow: var(--shadow-panel);
  text-align: center;
  line-height: var(--leading-normal);
}
.loading-card .eyebrow {
  margin-bottom: var(--space-4);
}
.loading-card h2 {
  margin: 0 0 var(--space-3);
  font-size: var(--text-3xl);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
}
.loading-card p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
}
.loading-card progress {
  display: block;
  width: 100%;
  height: 4px;
  margin-top: var(--space-6);
  border: 0;
  border-radius: var(--radius-xs);
  background: var(--color-switch-off);
  accent-color: var(--color-text);
  -webkit-appearance: none;
  appearance: none;
}
.loading-card progress::-webkit-progress-bar {
  border-radius: var(--radius-xs);
  background: var(--color-switch-off);
}
.loading-card progress::-webkit-progress-value {
  border-radius: var(--radius-xs);
  background: var(--color-text);
}
.loading-card progress::-moz-progress-bar {
  border-radius: var(--radius-xs);
  background: var(--color-text);
}
@media (max-height: 500px) {
  .loading-card {
    padding: var(--space-4);
  }
  .loading-card .eyebrow {
    display: none;
  }
  .loading-card h2 {
    margin-bottom: var(--space-2);
    font-size: var(--text-lg);
  }
}