/* Full-screen explorer. Tokens mirror niloy.tech's glass theme so the two feel like one site. */

:root {
  --bg-base: #030712;
  --accent: #0bceaf;
  --text-primary: rgba(255, 255, 255, 0.95);
  --text-secondary: rgba(255, 255, 255, 0.75);
  --text-muted: rgba(255, 255, 255, 0.6);
  --glass-panel: rgba(10, 15, 30, 0.82);
  /* For popovers inside the search pill: a backdrop-filter nested in another can't blur what's behind. */
  --glass-solid: rgba(12, 17, 32, 0.97);
  --glass-fill: rgba(255, 255, 255, 0.04);
  --glass-fill-hover: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.14);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-pill: 50px;
  --transition: 0.2s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
}

/* Light backdrop matching the basemap while tiles load. */
.explorer {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background: #f8f4f0;
}

/* Two classes: maplibre-gl.css sets .maplibregl-map { position: relative }. */
.explorer .explorer__map {
  position: absolute;
  inset: 0;
}

.explorer__status {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 24px;
  font-size: 0.95rem;
  line-height: 1.6;
  text-align: center;
  color: #334155;
}

.explorer__status a {
  color: #0a8f7a;
}

/* Several pieces set their own display, which would override the hidden attribute. */
.explorer [hidden] {
  display: none;
}

/* ---- Search column: search pill, view chips, summary card ---- */

.panel {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 3;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 360px;
  max-height: calc(100% - 32px);
  /* The gaps between pieces stay draggable map. */
  pointer-events: none;
}

.panel > *,
.panel__details > * {
  pointer-events: auto;
}

.panel__details {
  display: flex;
  flex-direction: column;
  gap: inherit;
  pointer-events: none;
}

.panel :where(p) {
  margin: 0;
}

/* Shared glass surface; chips and the expand pill take a lighter shadow. */
.search,
.card,
.search__results,
.about,
.view-settings,
.chips__chip,
.panel__expand {
  background: var(--glass-panel);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.panel__expand {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px 8px 16px;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-primary);
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transition: border-color var(--transition);
}

.panel__expand:hover {
  border-color: var(--glass-border-hover);
}

.panel__expand svg {
  color: var(--text-secondary);
}

/* z-index: backdrop-filter gives every piece its own stacking context, and the results list
   must cover the chips and card that follow. */
.search {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 4px;
  height: 50px;
  padding: 0 14px 0 6px;
  border-radius: var(--radius-pill);
  transition: border-color var(--transition);
}

.search:focus-within {
  border-color: var(--accent);
}

.search__icon-btn {
  flex: none;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  color: var(--text-secondary);
  background: none;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}

.search__icon-btn:hover,
.search__icon-btn[aria-expanded="true"] {
  color: var(--text-primary);
  background: var(--glass-fill-hover);
}

.search__input {
  flex: 1;
  min-width: 0;
  height: 100%;
  padding: 0 4px;
  font: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  background: none;
  border: 0;
  outline: none;
}

.search__input::placeholder {
  color: var(--text-muted);
}

.search__glass {
  flex: none;
  color: var(--accent);
}

.search__results,
.about {
  position: absolute;
  background: var(--glass-solid);
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  margin: 0;
  border-radius: var(--radius-md);
}

.search__results {
  max-height: min(420px, 60vh);
  overflow-y: auto;
  padding: 6px;
  list-style: none;
}

.search__result {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.search__result[aria-selected="true"] {
  background: var(--glass-fill-hover);
}

.search__result-icon {
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  color: var(--text-muted);
}

.search__result-text {
  display: grid;
  min-width: 0;
}

.search__result-label {
  overflow: hidden;
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.search__result-label mark {
  font-weight: 700;
  color: inherit;
  background: none;
}

.search__result-detail {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.search__result--current .search__result-icon,
.search__result--current .search__result-label {
  color: var(--accent);
}

.search__empty {
  padding: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.about {
  display: grid;
  gap: 10px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  padding: 16px 18px;
}

.about__title {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.about__hint {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.about__hint--touch {
  display: none;
}

@media (hover: none) {
  .about__hint--pointer {
    display: none;
  }

  .about__hint--touch {
    display: block;
  }
}

.about__countries ul {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 12px;
  margin: 0;
  padding: 10px 0 0;
  border-top: 1px solid var(--glass-border);
  list-style: none;
  font-size: 0.78rem;
}

.about__links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding-top: 10px;
  border-top: 1px solid var(--glass-border);
  font-size: 0.8rem;
}

.about__links a,
.about__countries a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.about__links a:hover,
.about__countries a:hover,
.about__countries a[aria-current="page"] {
  color: var(--accent);
}

/* One scrolling row, like Google Maps' category chips. No fade mask: a masked parent breaks the
   chips' backdrop-filter and shows a pale box behind the whole row. */
.chips {
  position: relative;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 2px 0;
  scrollbar-width: none;
}

.chips::-webkit-scrollbar {
  display: none;
}

.chips:empty {
  display: none;
}

.chips__chip {
  flex: none;
  padding: 7px 14px;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.chips__chip:hover {
  color: var(--text-primary);
  border-color: var(--glass-border-hover);
}

.chips__chip[aria-pressed="true"] {
  color: var(--bg-base);
  background: var(--accent);
  border-color: var(--accent);
}

.card {
  padding: 16px 18px;
  border-radius: var(--radius-md);
}

.card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

/* One h1 for search engines ("3D population density map Bangladesh"), styled as eyebrow + title. */
.card__heading {
  margin: 0;
  font: inherit;
}

.card__eyebrow,
.card__title {
  display: block;
}

.card__eyebrow {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.card__title {
  margin: 2px 0;
  font-family: "Fraunces", Georgia, serif;
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1.15;
}

.card__stat {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.card__toggle {
  flex: none;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  padding: 0;
  color: var(--text-secondary);
  background: var(--glass-fill);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  cursor: pointer;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.card__toggle:hover {
  color: var(--text-primary);
  background: var(--glass-fill-hover);
  border-color: var(--glass-border-hover);
}

.card .legend {
  margin-top: 14px;
}

.legend__title,
.summary__toggle,
.summary__title {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.legend__title {
  margin-bottom: 6px;
}

.legend__bar {
  height: 8px;
  border-radius: 4px;
}

.legend__ticks {
  display: flex;
  justify-content: space-between;
  margin-top: 4px;
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-secondary);
}

.legend__source {
  margin-top: 4px;
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* "<Country> in numbers": closed by default so the card looks as before; still indexed when closed. */
.summary {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--glass-border);
  font-size: 0.8rem;
}

.summary__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-secondary);
  list-style: none;
  cursor: pointer;
  transition: color var(--transition);
}

.summary__toggle::-webkit-details-marker {
  display: none;
}

.summary__toggle::after {
  content: "";
  width: 6px;
  height: 6px;
  margin-right: 4px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform var(--transition);
}

.summary[open] .summary__toggle::after {
  transform: translateY(1px) rotate(-135deg);
}

.summary__toggle:hover {
  color: var(--text-primary);
}

.summary__text {
  margin-top: 8px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.summary__title {
  margin-top: 10px;
}

.summary__list {
  display: grid;
  gap: 3px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.summary__list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-secondary);
}

.summary__value {
  flex: none;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

/* ---- View control: layers popover + 3D toggle, above MapLibre's zoom and compass ---- */

.view-ctrl {
  position: relative;
}

.explorer .view-ctrl__btn {
  display: grid;
  place-items: center;
  color: var(--text-primary);
}

.view-ctrl__btn--text {
  font: 600 0.7rem/1 "Inter", system-ui, sans-serif;
  letter-spacing: 0.02em;
}

.view-ctrl__btn[aria-expanded="true"],
.view-ctrl__btn[aria-pressed="true"] {
  color: var(--accent);
}

.view-settings {
  position: absolute;
  right: calc(100% + 10px);
  bottom: 0;
  display: grid;
  gap: 12px;
  width: 260px;
  padding: 14px 16px;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--text-primary);
  border-radius: var(--radius-md);
}

.view-settings__title {
  margin: 0;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.view-settings__slider {
  display: grid;
  gap: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.view-settings__slider output {
  margin-left: 4px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
}

.view-settings__slider input {
  width: 100%;
  margin: 0;
  accent-color: var(--accent);
}

.view-settings__reset {
  justify-self: start;
  padding: 6px 12px;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--glass-fill);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

/* Colour swatches, two per row; the native radio stays for keyboard and screen readers. */
.view-settings__palettes {
  min-width: 0;
  margin: 0;
  padding: 12px 0 0;
  border: 0;
  border-top: 1px solid var(--glass-border);
}

/* Floated, or the legend would sit on the fieldset's top border. */
.view-settings__palettes legend {
  float: left;
  width: 100%;
  margin-bottom: 8px;
  padding: 0;
}

.palettes {
  clear: both;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.palettes__option {
  position: relative;
  display: grid;
  gap: 5px;
  padding: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.palettes__option:hover {
  color: var(--text-primary);
  border-color: var(--glass-border-hover);
}

.palettes__option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.palettes__option:has(input:checked) {
  color: var(--text-primary);
  border-color: var(--accent);
}

.palettes__option:has(input:focus-visible) {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.palettes__swatch {
  height: 10px;
  border-radius: 3px;
}

.view-settings__reset:hover {
  color: var(--text-primary);
  background: var(--glass-fill-hover);
  border-color: var(--glass-border-hover);
}

.search__icon-btn:focus-visible,
.panel__expand:focus-visible,
.chips__chip:focus-visible,
.card__toggle:focus-visible,
.view-settings__reset:focus-visible,
.view-settings__slider input:focus-visible,
.about__links a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---- MapLibre controls, dark like the panel ---- */

.explorer .maplibregl-ctrl-group {
  background: var(--glass-panel);
  border: 1px solid var(--glass-border);
  box-shadow: none;
}

.explorer .maplibregl-ctrl-group button + button {
  border-top-color: var(--glass-border);
}

.explorer .maplibregl-ctrl-group .maplibregl-ctrl-icon,
.explorer .maplibregl-ctrl-attrib-button {
  filter: invert(1);
}

/* Three classes to beat maplibre-gl.css: .maplibregl-ctrl.maplibregl-ctrl-attrib */
.explorer .maplibregl-ctrl.maplibregl-ctrl-attrib {
  color: var(--text-muted);
  background: rgba(10, 15, 30, 0.75);
}

.explorer .maplibregl-ctrl-attrib a {
  color: var(--text-secondary);
}

/* ---- Phones: search column spans the top, card compact ---- */

@media (max-width: 899px) {
  .panel {
    top: 8px;
    left: 8px;
    right: 8px;
    width: auto;
    gap: 8px;
  }

  .search {
    height: 46px;
  }

  .card {
    padding: 12px 14px;
  }

  /* The eyebrow stays: it is half of the h1, and search engines index the phone layout. */
  .legend__source {
    display: none;
  }

  .card__title {
    font-size: 1.25rem;
  }

  .card .legend {
    margin-top: 10px;
  }
}