/* Singapore PSI lobby display.
   One unit (--u) is 1% of the screen's long edge, so type stays the same size
   whether the TV is mounted landscape or portrait. On a 1080p TV, 1u is about 19px.
   Motion marks a change and the board is still otherwise; everything animates
   with transform and opacity only, and all of it switches off for viewers who
   asked their device for reduced motion. */

@font-face {
  font-family: "Archivo";
  src: url("fonts/archivo-var-latin.woff2") format("woff2-variations"),
       url("fonts/archivo-var-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-display: swap;
}

:root {
  --u: 1vw;
  --surface: #161512;
  --surface-2: #1f1e1a;
  --ink: #efe9da;
  --ink-2: #b3ad9e;
  --ink-3: #7d786c;
  --hair: rgba(239, 233, 218, 0.16);
  --hair-2: rgba(239, 233, 218, 0.07);

  --good: #52c06c;
  --moderate: #4ea4ea;
  --unhealthy: #f6d24d;
  --very-unhealthy: #ee8410;
  --hazardous: #d8295a;
  --band: var(--ink-3);

  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-move: cubic-bezier(0.4, 0, 0.2, 1);
}
@media (orientation: portrait) {
  :root { --u: 1vh; }
}

[data-band="good"]           { --band: var(--good); }
[data-band="moderate"]       { --band: var(--moderate); }
[data-band="unhealthy"]      { --band: var(--unhealthy); }
[data-band="very-unhealthy"] { --band: var(--very-unhealthy); }
[data-band="hazardous"]      { --band: var(--hazardous); }

html, body {
  height: 100%;
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  overflow: hidden;
}
body {
  font-family: "Archivo", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: calc(var(--u) * 1.5);
  line-height: 1.3;
  font-variation-settings: "wdth" 100;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  cursor: none;
}
body.show-cursor { cursor: default; }
p, dl, dd, ol { margin: 0; }

.board {
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  padding: calc(var(--u) * 2) calc(var(--u) * 3.4) calc(var(--u) * 2.2);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  grid-gap: calc(var(--u) * 1.3);
  transition: transform 2s ease-in-out;
}

/* Tracked small caps: the board's signage voice. */
.eyebrow, .brand-name, .brand-credit, .clock-date, .panel-title, .pm-label, .tile-name, .trend text, .map text.mr-name {
  font-size: calc(var(--u) * 1.3);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-variation-settings: "wdth" 112, "wght" 520;
  color: var(--ink-2);
}

/* Rolling digits, in the manner of a split-flap board. Each digit sits in a
   clipped cell holding a strip of twenty digits that slides up or down. */
.roll { white-space: nowrap; }
.roll-char, .roll-static { display: inline-block; vertical-align: top; }
.roll-char {
  overflow: hidden;
  height: calc(1em * var(--lh, 1));
  transition: width 0.75s var(--ease-out);
}
.roll-strip { display: block; transition: transform 0.75s var(--ease-out); will-change: transform; }
.roll-digit, .roll-static {
  display: block;
  height: calc(1em * var(--lh, 1));
  line-height: var(--lh, 1);
  text-align: center;
}
.roll-static { display: inline-block; }
.roll.is-swapping { animation: swap 0.7s ease; }

/* Top rail */
.rail-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: calc(var(--u) * 0.9);
  border-bottom: 1px solid var(--hair);
}
.brand { display: flex; align-items: center; flex-wrap: wrap; }
.brand-credit { display: flex; align-items: center; white-space: nowrap; }
.brand-credit b { font-weight: inherit; color: var(--ink); margin-left: 0.3em; }
.brand-sep {
  width: calc(var(--u) * 0.35);
  height: calc(var(--u) * 0.35);
  border-radius: 50%;
  background: var(--ink-3);
  margin: 0 calc(var(--u) * 0.9);
}
.live-dot {
  width: calc(var(--u) * 0.8);
  height: calc(var(--u) * 0.8);
  border-radius: 50%;
  background: var(--band);
  margin-right: calc(var(--u) * 0.9);
  transition: background 0.8s ease;
  animation: breathe 3.6s ease-in-out infinite;
}
.clock { display: flex; align-items: baseline; }
.clock-time {
  --lh: 1;
  font-size: calc(var(--u) * 3.6);
  line-height: 1;
  font-variation-settings: "wdth" 96, "wght" 520;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.clock-date { margin-left: calc(var(--u) * 1.4); }

/* Body */
.body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
  grid-gap: calc(var(--u) * 4);
  min-height: 0;
}

.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}
.eyebrow { display: flex; align-items: center; margin-bottom: calc(var(--u) * 0.4); }
.eyebrow-sep {
  width: calc(var(--u) * 0.35);
  height: calc(var(--u) * 0.35);
  border-radius: 50%;
  background: var(--ink-3);
  margin: 0 calc(var(--u) * 0.9);
}
#hero-region { color: var(--ink); }

.hero-figure { display: flex; align-items: flex-end; }
.hero-value {
  --lh: 0.86;
  font-size: calc(var(--u) * 15.2);
  line-height: 0.86;
  font-variation-settings: "wdth" 78, "wght" 640;
  letter-spacing: -0.035em;
  margin-left: -0.03em;
}
.hero-band {
  margin-left: calc(var(--u) * 2.2);
  padding-bottom: calc(var(--u) * 0.9);
  max-width: calc(var(--u) * 15);
}
.band-bar {
  position: relative;
  display: block;
  width: 100%;
  min-width: calc(var(--u) * 9);
  height: calc(var(--u) * 0.5);
  background: var(--band);
  margin-bottom: calc(var(--u) * 0.9);
  transition: background 0.8s ease;
}
.band-bar::after {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background: var(--band);
  transform-origin: left center;
}
.band-bar.is-sweeping { transition: none; }
.band-bar.is-sweeping::after { animation: sweep 1s var(--ease-move) both; }
.band-word {
  display: block;
  font-size: calc(var(--u) * 4.2);
  line-height: 0.95;
  font-variation-settings: "wdth" 92, "wght" 560;
  letter-spacing: -0.02em;
}
.band-word.is-changing { animation: rise 0.8s var(--ease-out) 0.3s both; }

.advice {
  margin-top: calc(var(--u) * 1);
  padding-top: calc(var(--u) * 0.8);
  border-top: 1px solid var(--hair);
  max-width: calc(var(--u) * 46);
}
.advice-lead {
  font-size: calc(var(--u) * 2.2);
  line-height: 1.2;
  font-variation-settings: "wdth" 100, "wght" 520;
  margin-bottom: calc(var(--u) * 0.5);
}
.advice-groups {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-gap: calc(var(--u) * 0.15) calc(var(--u) * 1.4);
  font-size: calc(var(--u) * 1.35);
  line-height: 1.2;
}
.advice-groups:empty { display: none; }
.advice-groups dt { color: var(--ink-2); white-space: nowrap; }

.pm-block { margin-top: calc(var(--u) * 0.8); }
.pm-label { display: block; margin-bottom: calc(var(--u) * 0.15); }
.pm-line {
  display: flex;
  align-items: baseline;
  color: var(--ink-2);
}
.pm-value {
  --lh: 1;
  font-size: calc(var(--u) * 4.4);
  line-height: 1;
  color: var(--ink);
  font-variation-settings: "wdth" 86, "wght" 600;
  letter-spacing: -0.025em;
  margin-left: -0.02em;
}
.pm-unit { margin-left: calc(var(--u) * 0.7); font-size: calc(var(--u) * 1.6); }
.pm-band { margin-left: calc(var(--u) * 1.3); font-size: calc(var(--u) * 2); color: var(--ink-2); }

/* Regions: map above, tiles below */
.regions {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  grid-gap: calc(var(--u) * 1.2);
  min-width: 0;
  min-height: 0;
  align-content: center;
}
.map { min-height: 0; }
.map svg { width: 100%; height: 100%; display: block; }
.map .mr { transition: opacity 0.8s ease; }
.is-loading .map .mr { opacity: 0; }
.map .mr-fill { fill: var(--rc); fill-opacity: 0.26; transition: fill 0.8s ease, fill-opacity 0.8s ease; }
.map .mr.is-selected .mr-fill { fill-opacity: 0.6; }
.map .mr-pulse { fill: var(--rc); opacity: 0; }
.map .mr.is-pulsing .mr-pulse { animation: pulse 1.3s ease; }
.map .mr-divider { fill: none; stroke: var(--surface); stroke-width: 6; }
.map .mr-outline { fill: none; stroke: var(--hair); stroke-width: 1.5; }
.map text { text-anchor: middle; pointer-events: none; }
.map text.mr-name { font-size: 34px; fill: var(--ink-2); }
.map text.mr-val {
  font-size: 78px;
  font-variation-settings: "wdth" 84, "wght" 600;
  fill: var(--ink-2);
  letter-spacing: -0.02em;
}
.map text.mr-val.is-changing { animation: rise 0.8s var(--ease-out) both; }
.map .ml.is-selected text.mr-val, .map .ml.is-selected text.mr-name { fill: var(--ink); }

/* Regions re-tint one after another, west to east, when readings change or the board wakes. */
.map .mr[data-region="west"],    .map .mr[data-region="west"] .mr-fill,    .tile[data-region="west"] .tile-dot    { transition-delay: 0s; }
.map .mr[data-region="north"],   .map .mr[data-region="north"] .mr-fill,   .tile[data-region="north"] .tile-dot   { transition-delay: 0.12s; }
.map .mr[data-region="central"], .map .mr[data-region="central"] .mr-fill, .tile[data-region="central"] .tile-dot { transition-delay: 0.24s; }
.map .mr[data-region="south"],   .map .mr[data-region="south"] .mr-fill,   .tile[data-region="south"] .tile-dot   { transition-delay: 0.36s; }
.map .mr[data-region="east"],    .map .mr[data-region="east"] .mr-fill,    .tile[data-region="east"] .tile-dot    { transition-delay: 0.48s; }

.tiles {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--hair);
}
.tiles-rule {
  position: absolute;
  top: -1px; left: 0;
  width: 20%;
  height: calc(var(--u) * 0.3);
  background: var(--rc, var(--ink-3));
  transition: transform 0.55s var(--ease-move), background 0.6s ease;
}
.tile {
  position: relative;
  padding: calc(var(--u) * 1) calc(var(--u) * 0.4) calc(var(--u) * 0.4) calc(var(--u) * 0.8);
  border-left: 1px solid var(--hair-2);
  color: var(--ink-2);
  min-width: 0;
  transition: color 0.4s ease;
}
.tile:first-child { border-left: 0; padding-left: 0; }
.tile.is-selected, .tile.is-selected .tile-name { color: var(--ink); }
.tile-name { display: flex; align-items: center; white-space: nowrap; font-size: calc(var(--u) * 1.2); letter-spacing: 0.1em; transition: color 0.4s ease; }
.tile-dot {
  width: calc(var(--u) * 0.7);
  height: calc(var(--u) * 0.7);
  border-radius: 50%;
  background: var(--rc);
  margin-right: calc(var(--u) * 0.6);
  flex: none;
  transition: background 0.6s ease;
}
.tile-psi {
  --lh: 1;
  display: block;
  font-size: calc(var(--u) * 3);
  line-height: 1;
  font-variation-settings: "wdth" 84, "wght" 600;
  letter-spacing: -0.02em;
  margin: calc(var(--u) * 0.55) 0 calc(var(--u) * 0.4);
}
.tile-pm { display: block; font-size: calc(var(--u) * 1.3); color: var(--ink-3); font-variant-numeric: tabular-nums; white-space: nowrap; }
.tile-pm b { font-weight: inherit; color: var(--ink-2); }

/* Bottom rail */
.rail-bottom {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1.05fr) minmax(0, 0.9fr);
  border-top: 1px solid var(--hair);
  padding-top: calc(var(--u) * 1.3);
}
.panel { padding: 0 calc(var(--u) * 2.2); border-left: 1px solid var(--hair); min-width: 0; }
.panel:first-child { padding-left: 0; border-left: 0; }
.panel:last-child { padding-right: 0; }
.panel-title { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: calc(var(--u) * 0.8); }
.panel-title > span:first-child { flex: none; white-space: nowrap; margin-right: calc(var(--u) * 1); }
.panel-note { color: var(--ink-3); letter-spacing: 0.06em; text-transform: none; text-align: right; font-variation-settings: "wdth" 100, "wght" 480; }

/* The bottom-left panel alternates two views; the outgoing one lifts away and the incoming one rises in. */
.panel-detail { position: relative; }
.detail-pollutants { position: absolute; top: 0; left: 0; right: calc(var(--u) * 2.2); }
.panel-detail[data-view="trend"] .detail-pollutants,
.panel-detail[data-view="pollutants"] .detail-trend { opacity: 0; visibility: hidden; }
.panel-detail .detail-view.is-leaving { visibility: visible; animation: lift 0.5s var(--ease-move) both; }
.panel-detail .detail-view.is-entering { animation: rise 0.65s var(--ease-out) 0.2s both; }

.trend { height: calc(var(--u) * 9); }
.trend svg { width: 100%; height: 100%; display: block; overflow: visible; }
.trend .t-line { fill: none; stroke: var(--ink-2); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.trend .t-wash { fill: var(--band); fill-opacity: 0.08; }
.trend .t-grid { stroke: var(--hair-2); stroke-width: 1; }
.trend .t-threshold { stroke: var(--hair); stroke-width: 1; }
.trend .t-dot { fill: var(--band); stroke: var(--surface); stroke-width: 3; }
.trend text { fill: var(--ink-3); font-size: calc(var(--u) * 1.15); letter-spacing: 0.08em; }
.trend .t-empty { fill: var(--ink-3); text-transform: none; letter-spacing: 0; font-size: calc(var(--u) * 1.5); }

.pollutants {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-gap: calc(var(--u) * 0.3) calc(var(--u) * 1.2);
  align-items: center;
  line-height: 1.15;
}
.pol-name { color: var(--ink-2); font-size: calc(var(--u) * 1.35); white-space: nowrap; }
.pol-bar { height: calc(var(--u) * 0.45); background: var(--hair-2); position: relative; }
.pol-bar i { position: absolute; top: 0; left: 0; bottom: 0; width: 100%; background: var(--ink-3); transform-origin: left center; transition: transform 1s ease; }
.pol-val { font-variant-numeric: tabular-nums; color: var(--ink-2); font-size: calc(var(--u) * 1.35); min-width: calc(var(--u) * 2.4); text-align: right; }
.pol-name.is-lead, .pol-val.is-lead { color: var(--ink); }
.pol-bar.is-lead i { background: var(--band); }
.pol-tag {
  margin-left: calc(var(--u) * 0.55);
  font-size: calc(var(--u) * 1.05);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-2);
  font-variation-settings: "wdth" 112, "wght" 520;
}

.wx { display: flex; align-items: center; }
.wx-temp {
  font-size: calc(var(--u) * 5.4);
  line-height: 0.9;
  font-variation-settings: "wdth" 86, "wght" 560;
  letter-spacing: -0.03em;
}
.wx-deg { color: var(--ink-2); font-variation-settings: "wdth" 100, "wght" 400; }
.wx-detail { margin-left: calc(var(--u) * 1.6); min-width: 0; }
.wx-forecast { display: flex; align-items: center; font-size: calc(var(--u) * 1.7); line-height: 1.25; }
.wx-icon { display: inline-flex; margin-right: calc(var(--u) * 0.8); flex: none; }
.wx-icon svg { width: calc(var(--u) * 2.2); height: calc(var(--u) * 2.2); stroke: var(--ink-2); fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; overflow: visible; }
.wx-line { color: var(--ink-3); margin-top: calc(var(--u) * 0.25); font-size: calc(var(--u) * 1.4); white-space: nowrap; }
.wx-line:empty { display: none; }

/* Weather icons carry one small, slow loop each. */
.wx-icon .i-rays { transform-box: fill-box; transform-origin: center; animation: turn 70s linear infinite; }
.wx-icon .i-cloud { animation: drift 7s ease-in-out infinite alternate; }
.wx-icon .i-drop { animation: fall 2.4s ease-in infinite; }
.wx-icon .i-drop-2 { animation-delay: 0.8s; }
.wx-icon .i-drop-3 { animation-delay: 1.6s; }
.wx-icon .i-bolt { animation: flicker 7s ease-in-out infinite; }
.wx-icon .i-haze-1 { animation: drift 6s ease-in-out infinite alternate; }
.wx-icon .i-haze-2 { animation: drift 8s ease-in-out infinite alternate-reverse; }
.wx-icon .i-haze-3 { animation: drift 7s ease-in-out infinite alternate; }
.wx-icon .i-wind-1 { animation: gust 3s ease-in-out infinite; }
.wx-icon .i-wind-2 { animation: gust 3s ease-in-out infinite 0.4s; }
.wx-icon .i-wind-3 { animation: gust 3s ease-in-out infinite 0.8s; }

.meta-progress { height: 2px; background: var(--hair-2); margin: calc(var(--u) * -0.2) 0 calc(var(--u) * 0.9); }
.meta-progress i { display: block; height: 100%; width: 0; background: var(--band); transition: width 1.2s linear, background 0.8s ease; }
.meta-updated {
  font-size: calc(var(--u) * 2.3);
  line-height: 1.1;
  font-variation-settings: "wdth" 96, "wght" 540;
  font-variant-numeric: tabular-nums;
}
.meta-line { color: var(--ink-3); margin-top: calc(var(--u) * 0.35); font-size: calc(var(--u) * 1.4); }

.notice {
  position: absolute;
  left: calc(var(--u) * 3.4);
  bottom: calc(var(--u) * 0.55);
  font-size: calc(var(--u) * 1.25);
  letter-spacing: 0.04em;
  color: var(--ink-2);
}
.notice::before {
  content: "";
  display: inline-block;
  width: calc(var(--u) * 0.6);
  height: calc(var(--u) * 0.6);
  margin-right: calc(var(--u) * 0.7);
  background: var(--unhealthy);
  vertical-align: middle;
  transform: rotate(45deg);
}
.notice[hidden] { display: none; }

/* Load-in */
.reveal { opacity: 1; transform: none; transition: opacity 1s ease, transform 1s ease; }
.is-loading .reveal { opacity: 0; transform: translateY(calc(var(--u) * 0.8)); }
.body .reveal:nth-child(2) { transition-delay: 0.12s; }
.rail-bottom .reveal:nth-child(1) { transition-delay: 0.25s; }
.rail-bottom .reveal:nth-child(2) { transition-delay: 0.35s; }
.rail-bottom .reveal:nth-child(3) { transition-delay: 0.45s; }

@keyframes breathe {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.82); }
}
@keyframes swap {
  0% { opacity: 1; }
  30% { opacity: 0.25; }
  100% { opacity: 1; }
}
@keyframes sweep {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(0.35em); }
  to { opacity: 1; transform: none; }
}
@keyframes lift {
  from { opacity: 1; transform: none; }
  to { opacity: 0; transform: translateY(-0.5em); }
}
@keyframes pulse {
  0% { opacity: 0; }
  35% { opacity: 0.5; }
  100% { opacity: 0; }
}
@keyframes turn {
  to { transform: rotate(360deg); }
}
@keyframes drift {
  from { transform: translateX(-0.7px); }
  to { transform: translateX(0.7px); }
}
@keyframes fall {
  0% { opacity: 0; transform: translateY(-1.2px); }
  25% { opacity: 1; }
  80% { opacity: 1; }
  100% { opacity: 0; transform: translateY(2.2px); }
}
@keyframes flicker {
  0%, 88%, 100% { opacity: 1; }
  90% { opacity: 0.15; }
  92% { opacity: 1; }
  94% { opacity: 0.3; }
}
@keyframes gust {
  0%, 100% { transform: translateX(0); opacity: 1; }
  50% { transform: translateX(1.2px); opacity: 0.55; }
}
@keyframes trend-draw {
  from { stroke-dashoffset: var(--reveal); }
  to { stroke-dashoffset: 0; }
}
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* Portrait TVs: one column, map full width, panels stacked */
@media (orientation: portrait) {
  .board { padding: calc(var(--u) * 2.4) calc(var(--u) * 3) calc(var(--u) * 2.2); }
  .brand { flex: 1 1 auto; min-width: 0; }
  .brand-name { white-space: nowrap; }
  .brand-credit { flex-basis: 100%; margin: calc(var(--u) * 0.35) 0 0 calc(var(--u) * 1.7); }
  .brand-sep { display: none; }
  .clock { flex: none; white-space: nowrap; }
  .body { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr); grid-gap: calc(var(--u) * 2.2); }
  .hero { justify-content: flex-start; }
  .regions { grid-template-rows: minmax(0, 1fr) auto; align-content: start; }
  .map { max-height: calc(var(--u) * 22); }
  .rail-bottom { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); grid-gap: calc(var(--u) * 1.6) 0; }
  .panel-detail { grid-column: 1 / -1; padding-right: 0; padding-bottom: calc(var(--u) * 1.4); border-bottom: 1px solid var(--hair); }
  .panel-weather { padding-left: 0; border-left: 0; }
  .detail-pollutants { right: 0; }
}