/* Historic maps page. Shares the site's type and palette with ../style.css. */

@font-face {
  font-family: 'Libre Caslon Text';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(../fonts/caslon-400-normal.woff2) format('woff2');
}
@font-face {
  font-family: 'Libre Caslon Text';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(../fonts/caslon-400-italic.woff2) format('woff2');
}
@font-face {
  font-family: 'Archivo';
  font-style: normal;
  font-weight: 100 900;
  font-stretch: 75% 125%;
  font-display: swap;
  src: url(../fonts/archivo-100-900-normal.woff2) format('woff2');
}

:root {
  --ink: #0f1716;
  --ink-2: #15211f;
  --teal: #233d3b;
  --parchment: #f2ede1;
  --fog: #c9cfc8;
  --muted: #9aa89f;
  --amber: #d6a54d;
  --amber-2: #e9c176;
  --rust: #b56826;
  --line: rgba(242, 237, 225, 0.14);
  --line-strong: rgba(242, 237, 225, 0.28);
  --glass: rgba(15, 23, 22, 0.86);
  --serif: 'Libre Caslon Text', Georgia, serif;
  --sans: 'Archivo', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --gutter: clamp(14px, 2.5vw, 28px);
  --header: 64px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  font-family: var(--sans);
  color: var(--parchment);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
  font-synthesis: none;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}
h1,
h2,
p,
ol,
ul {
  margin: 0;
}
a {
  color: inherit;
}
button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  background: none;
  border: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}
:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}
.eyebrow {
  font: 600 11px/1.3 var(--sans);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 10px;
}
.small {
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}
.skip {
  position: absolute;
  top: -80px;
  left: 12px;
  z-index: 2000;
  padding: 12px 16px;
  background: var(--parchment);
  color: var(--ink);
  border-radius: 4px;
}
.skip:focus {
  top: 12px;
}

/* Header */
.site {
  height: var(--header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 var(--gutter);
  border-bottom: 1px solid var(--line);
  background: var(--ink);
  position: relative;
  z-index: 1100;
}
.brand {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-decoration: none;
}
.brand-title {
  font: 20px/1 var(--serif);
}
.brand-title em {
  font-style: italic;
  color: var(--amber);
}
.brand-sub {
  font: 500 10px/1.2 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.site-nav {
  display: flex;
  gap: 4px;
}
.site-nav a {
  font: 500 12px/1 var(--sans);
  letter-spacing: 0.04em;
  color: var(--fog);
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 3px;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover {
  color: var(--parchment);
  background: rgba(242, 237, 225, 0.06);
}
.site-nav a[aria-current='page'] {
  color: var(--parchment);
  border-bottom-color: var(--amber);
}

/* Map stage */
.app {
  position: relative;
  height: calc(100vh - var(--header));
  height: calc(100dvh - var(--header));
}
#map {
  position: absolute;
  inset: 0;
  background: #e6e2d5;
}
.leaflet-container {
  font-family: var(--sans);
}
.leaflet-control-zoom {
  border: 1px solid var(--line-strong) !important;
  border-radius: 4px !important;
  overflow: hidden;
  box-shadow: 0 14px 30px -14px rgba(0, 0, 0, 0.7) !important;
}
.leaflet-control-zoom a {
  background: var(--glass) !important;
  color: var(--parchment) !important;
  border-bottom: 1px solid var(--line) !important;
  width: 38px !important;
  height: 38px !important;
  line-height: 38px !important;
  font-size: 18px !important;
}
.leaflet-control-zoom a:hover {
  background: rgba(35, 61, 59, 0.95) !important;
}
.leaflet-control-attribution {
  background: rgba(15, 23, 22, 0.78) !important;
  color: var(--fog) !important;
  font: 10px/1.4 var(--sans) !important;
  padding: 3px 8px !important;
  border-radius: 3px 0 0 0;
  max-width: min(60vw, 420px);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.leaflet-control-attribution a {
  color: var(--parchment) !important;
}
.leaflet-control-scale-line {
  background: rgba(15, 23, 22, 0.7);
  color: var(--parchment);
  border-color: var(--line-strong);
  font: 600 10px/1.4 var(--sans);
  letter-spacing: 0.06em;
}
.leaflet-popup-content-wrapper,
.leaflet-popup-tip {
  background: var(--parchment);
  color: var(--ink);
  box-shadow: 0 20px 40px -18px rgba(0, 0, 0, 0.6);
}
.leaflet-popup-content {
  font: 400 14px/1.5 var(--serif);
  margin: 14px 18px;
}
.leaflet-popup-content b {
  font: 700 11px/1.3 var(--sans);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--rust);
  display: block;
  margin-bottom: 4px;
}
.leaflet-popup-content h3 {
  font: 400 20px/1.15 var(--serif);
  margin: 0 0 8px;
  color: var(--teal);
}
.leaflet-popup-content a {
  color: var(--rust);
}
.leaflet-popup-content .place-link {
  display: inline-block;
  margin-top: 10px;
  font: 600 10px/1 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  padding: 9px 11px;
  border: 1px solid var(--teal);
  border-radius: 3px;
}
.leaflet-popup-content .place-link:hover {
  background: var(--teal);
  color: var(--parchment);
}
.leaflet-container a.leaflet-popup-close-button {
  color: var(--teal);
}
.leaflet-tile {
  filter: none;
}
.leaflet-pane.compare-pane {
  will-change: clip-path;
}

/* Swipe divider */
.divider {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--parchment);
  z-index: 650;
  cursor: ew-resize;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.35);
  touch-action: none;
}
.divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 44px;
  height: 44px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--glass);
  border: 1px solid var(--parchment);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.8);
}
.divider::after {
  content: '⇆';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -52%);
  color: var(--parchment);
  font-size: 20px;
}
.divider-label {
  position: absolute;
  top: 82px;
  padding: 7px 10px;
  white-space: nowrap;
  font: 600 10px/1 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--parchment);
  background: var(--glass);
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  z-index: 640;
  pointer-events: none;
}
.divider-label.left {
  right: calc(100% + 12px);
}
.divider-label.right {
  left: calc(100% + 12px);
}

/* Panel */
.panel {
  position: absolute;
  left: var(--gutter);
  top: 16px;
  bottom: 96px;
  width: min(380px, calc(100% - 2 * var(--gutter)));
  z-index: 800;
  display: flex;
  flex-direction: column;
  background: var(--glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.9);
  overflow: hidden;
}
.panel-toggle {
  display: none;
}
.panel-body {
  overflow: auto;
  padding: 22px 22px 18px;
  overscroll-behavior: contain;
}
.panel h1 {
  font: 400 30px/1.05 var(--serif);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.panel .lede {
  font: 400 14.5px/1.55 var(--serif);
  color: var(--fog);
  margin-bottom: 18px;
}
.panel h2 {
  font: 700 11px/1.3 var(--sans);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 10px;
}
.block {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.mode {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line-strong);
  border-radius: 5px;
  margin-bottom: 16px;
}
.mode button {
  padding: 10px;
  border-radius: 3px;
  font: 600 11px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fog);
}
.mode button[aria-pressed='true'] {
  background: var(--amber);
  color: var(--ink);
}
.hint {
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
  margin-top: 8px;
}
.compare-selects {
  display: grid;
  gap: 10px;
}
.compare-selects label {
  display: grid;
  gap: 5px;
  font: 600 10px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
select {
  font: 14px/1.2 var(--sans);
  color: var(--parchment);
  background: var(--ink-2);
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 9px 10px;
}

.layers {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 4px;
}
.layer {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 12px;
  padding: 10px 10px 8px;
  border-radius: 5px;
  border: 1px solid transparent;
  transition:
    background 0.2s,
    border-color 0.2s;
}
.layer.is-on {
  background: rgba(242, 237, 225, 0.05);
  border-color: var(--line);
}
.layer.is-active {
  border-color: var(--amber);
}
.layer input[type='checkbox'] {
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  accent-color: var(--amber);
}
.layer .head {
  display: flex;
  flex-direction: column;
  gap: 3px;
  cursor: pointer;
}
.layer .year {
  font: 700 12px/1 var(--sans);
  letter-spacing: 0.08em;
  color: var(--amber-2);
  font-variant-numeric: tabular-nums;
}
.layer .title {
  font: 400 14.5px/1.35 var(--serif);
}
.layer .controls {
  grid-column: 2;
  display: none;
  align-items: center;
  gap: 10px;
}
.layer.is-on .controls {
  display: flex;
}
.layer input[type='range'] {
  flex: 1;
  accent-color: var(--amber);
  height: 22px;
}
.layer .pct {
  font: 600 10px/1 var(--sans);
  letter-spacing: 0.08em;
  color: var(--muted);
  min-width: 34px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.layer .info {
  grid-column: 2;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
  display: none;
}
.layer.is-on .info {
  display: block;
}

.vectors {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 2px;
}
.check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 7px 4px;
  font: 400 14px/1.35 var(--serif);
  cursor: pointer;
  border-radius: 4px;
}
.check:hover {
  background: rgba(242, 237, 225, 0.04);
}
.check input {
  width: 16px;
  height: 16px;
  margin-top: 2px;
  accent-color: var(--amber);
  flex-shrink: 0;
}
.check small {
  display: block;
  font: 400 11px/1.4 var(--sans);
  color: var(--muted);
}
.swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 2px;
  margin-right: 8px;
  vertical-align: -1px;
  border: 1px solid rgba(0, 0, 0, 0.35);
}
.legend-details {
  margin-top: 8px;
}
.legend-details summary {
  cursor: pointer;
  font: 600 10px/1 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fog);
  padding: 8px 4px;
}
.legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px 12px;
  padding: 6px 4px 2px;
  font: 400 12px/1.4 var(--sans);
  color: var(--fog);
}
.places {
  display: grid;
  gap: 4px;
}
.places button {
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 5px;
  font: 400 14px/1.3 var(--serif);
  color: var(--parchment);
  transition:
    border-color 0.2s,
    background 0.2s;
}
.places button:hover {
  border-color: var(--amber);
  background: rgba(242, 237, 225, 0.05);
}
.places button span {
  font: 700 10px/1 var(--sans);
  letter-spacing: 0.1em;
  color: var(--amber);
  border: 1px solid var(--amber);
  border-radius: 2px;
  padding: 5px 6px;
}
.credits {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

/* Timeline */
.timeline {
  position: absolute;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  width: min(760px, calc(100% - 2 * var(--gutter)));
  z-index: 800;
  padding: 14px 18px 10px;
  background: var(--glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 6px;
}
.timeline input[type='range'] {
  width: 100%;
  accent-color: var(--amber);
  height: 24px;
  margin: 0;
}
.ticks {
  display: flex;
  justify-content: space-between;
  padding: 0 2px;
}
.ticks span {
  font: 600 9px/1 var(--sans);
  letter-spacing: 0.08em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.ticks span.is-active {
  color: var(--amber-2);
}
#time-label {
  font: 400 14px/1.3 var(--serif);
  color: var(--parchment);
  text-align: center;
}
#time-label b {
  font: 700 11px/1 var(--sans);
  letter-spacing: 0.12em;
  color: var(--amber-2);
  margin-right: 10px;
}

.no-script {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 1200;
  margin: 0;
  padding: 16px var(--gutter);
  background: var(--amber);
  color: var(--ink);
  font-weight: 600;
}

@media (max-width: 820px) {
  .site {
    gap: 10px;
  }
  .brand-sub,
  .hide-mobile {
    display: none;
  }
  .brand-title {
    font-size: 15px;
    white-space: nowrap;
  }
  .site-nav a {
    padding: 10px 8px;
    font-size: 11px;
    white-space: nowrap;
  }
  .panel {
    left: 10px;
    right: 10px;
    width: auto;
    top: auto;
    bottom: 128px;
    max-height: min(56vh, 520px);
    transition: max-height 0.35s var(--ease);
  }
  .panel.is-collapsed {
    max-height: 44px;
  }
  .panel-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 13px 16px;
    font: 600 11px/1 var(--sans);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--parchment);
    border-bottom: 1px solid var(--line);
  }
  .panel.is-collapsed .panel-toggle {
    border-bottom-color: transparent;
  }
  .panel.is-collapsed .panel-toggle span {
    transform: rotate(180deg);
  }
  .panel-body {
    padding: 16px;
  }
  .panel h1 {
    font-size: 24px;
  }
  .timeline {
    bottom: 12px;
    padding: 10px 12px 8px;
    width: calc(100% - 20px);
  }
  .ticks span:nth-child(even) {
    visibility: hidden;
  }
  .divider-label {
    top: 70px;
    font-size: 9px;
    padding: 6px 8px;
  }
  .leaflet-bottom.leaflet-right {
    bottom: 0;
  }
  .leaflet-control-zoom {
    display: none;
  }
  .leaflet-control-attribution {
    max-width: 100vw;
    white-space: normal;
    border-radius: 0;
  }
  .timeline {
    bottom: 30px;
  }
}