/* AI context: ai/context/public-site/public-site-overview.md */

/* --- Tokens -------------------------------------------------------------------------------- */

:root {
  color-scheme: light;

  --page: #f5f6f3;
  --ink: #141615;
  --ink-2: #4c524e;
  --ink-3: #68716b;
  --hairline: #dfe2dd;
  --axis: #c2c7c1;
  --hover-wash: rgba(20, 22, 21, 0.05);

  --soil-band: 110, 88, 58;          /* rgb of the soil strata tint, alpha set per layer */
  --frost: #3f6fa7;                  /* the 0 °C line and frozen ground */
  --frost-wash: rgba(63, 111, 167, 0.10);
  --snow-wash: rgba(160, 185, 215, 0.22);

  /* Hero moments: now is the emphasised ink line, the two context profiles get distinct hues. */
  --moment-24h: #eb6834;
  --moment-7d: #4a3aa7;

  /* Depth: warm and light at the surface, cool and dark deep down. Above ground: neutral steps. */
  --c-air: #282f35;
  --c-mast-040: #434a51;
  --c-mast-020: #60676f;
  --c-mast-010: #7e868e;
  --c-mast-005: #9ea6ae;
  --c-soil-000: #d3a329;
  --c-soil-010: #aca229;
  --c-soil-020: #819f3c;
  --c-soil-030: #539851;
  --c-soil-040: #138f64;
  --c-soil-050: #008273;
  --c-soil-060: #00737c;
  --c-soil-070: #00627f;
  --c-soil-080: #00507c;
  --c-soil-090: #213e72;
  --c-soil-100: #2e2e62;

  /* Temperature, diverging around 0 °C: 4 cold steps, neutral, 4 warm steps. */
  --t-cold-4: #0a3f86;
  --t-cold-3: #3f6fa7;
  --t-cold-2: #759ec8;
  --t-cold-1: #b0cfea;
  --t-zero: #eeefeb;
  --t-warm-1: #f4c5b1;
  --t-warm-2: #db9278;
  --t-warm-3: #c05d45;
  --t-warm-4: #a21c14;

  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;

    --page: #141615;
    --ink: #eef1ee;
    --ink-2: #b7bdb8;
    --ink-3: #858b87;
    --hairline: #2a2e2c;
    --axis: #3b403d;
    --hover-wash: rgba(238, 241, 238, 0.06);

    --soil-band: 190, 160, 120;
    --frost: #60aaf3;
    --frost-wash: rgba(96, 170, 243, 0.12);
    --snow-wash: rgba(200, 220, 245, 0.10);

    --moment-24h: #d95926;
    --moment-7d: #9085e9;

    --c-air: #e0e5eb;
    --c-mast-040: #c4cad0;
    --c-mast-020: #a8afb6;
    --c-mast-010: #8e959c;
    --c-mast-005: #747b83;
    --c-soil-000: #fbdd67;
    --c-soil-010: #d3dd6c;
    --c-soil-020: #a7da7b;
    --c-soil-030: #78d58f;
    --c-soil-040: #44cda4;
    --c-soil-050: #00c1b6;
    --c-soil-060: #00b3c4;
    --c-soil-070: #00a2cc;
    --c-soil-080: #3890cd;
    --c-soil-090: #547dc7;
    --c-soil-100: #686bb9;

    --t-cold-4: #60aaf3;
    --t-cold-3: #4d88c4;
    --t-cold-2: #3a6897;
    --t-cold-1: #284a6c;
    --t-zero: #282927;
    --t-warm-1: #6c3629;
    --t-warm-2: #984c3a;
    --t-warm-3: #c7624d;
    --t-warm-4: #f87962;
  }
}

/* --- Base ---------------------------------------------------------------------------------- */

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 15px/1.5 var(--font);
}

a { color: inherit; text-underline-offset: 2px; }

/* Chart titles stay modest: the charts are the content, the titles only name them. */
h1, h2 { margin: 0; font-weight: 600; line-height: 1.25; text-wrap: balance; }
h1, h2 { font-size: clamp(1.1rem, 1rem + 0.4vw, 1.25rem); }
.title-note { color: var(--ink-3); font-weight: 400; font-size: 0.85em; }

[hidden] { display: none !important; }

.wrap {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: max(16px, env(safe-area-inset-left), min(4vw, 40px));
}

/* --- Masthead ------------------------------------------------------------------------------ */

.masthead {
  border-bottom: 1px solid var(--hairline);
  padding-top: env(safe-area-inset-top, 0px);
}

.masthead-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 12px;
}

.brand { margin: 0; font-weight: 700; letter-spacing: 0.01em; }

.masthead-meta { display: flex; align-items: center; gap: 16px; }
.updated { color: var(--ink-3); font-size: 0.87rem; }
.updated.is-stale { color: var(--t-warm-3); }

.overview {
  display: flex;
  gap: 8px 40px;
  margin-block: 0;
  padding-block: 10px 28px;
}
.overview div { min-width: 0; }
.overview .is-outdoors { padding-right: 40px; border-right: 1px solid var(--hairline); }
.overview dt { color: var(--ink-3); font-size: 0.8rem; font-variant-numeric: tabular-nums; }
.overview dd { margin: 0; font-size: 1.35rem; font-weight: 600; line-height: 1.15; font-variant-numeric: tabular-nums; white-space: nowrap; }
.overview.is-stale dd { color: var(--ink-3); }
@media (max-width: 520px) {
  .overview { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 6px; padding-block: 6px 20px; }
  .overview .is-outdoors { padding-right: 6px; }
  .overview dd { font-size: 1.15rem; }
}

.view-nav { display: flex; gap: 28px; }
.view-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  margin-bottom: -1px;             /* the active underline sits on the masthead border */
  border-bottom: 2px solid transparent;
  color: var(--ink-2);
  text-decoration: none;
  font-weight: 500;
}
.view-nav a:hover { color: var(--ink); }
.view-nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--ink); font-weight: 600; }
.view-nav a:focus-visible { outline: 2px solid var(--frost); outline-offset: 2px; }

/* --- Sections ------------------------------------------------------------------------------ */

.section { padding-block: clamp(32px, 6vw, 30px); }
.section + .section { border-top: 1px solid var(--hairline); }

.section-head { position: relative; max-width: 46rem; margin-bottom: 20px; }
.heading-row { display: flex; align-items: center; gap: 0; margin-bottom: 6px; }
.heading-row h1, .heading-row h2 { min-width: 0; }
.chart-help { flex: none; }
.chart-help summary {
  display: grid;
  place-items: center;
  position: relative;
  width: 32px;
  height: 32px;
  color: var(--ink-2);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.chart-help summary::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 19px;
  height: 19px;
  transform: translate(-50%, -50%);
  border: 1px solid var(--axis);
  border-radius: 50%;
}
.chart-help summary::-webkit-details-marker { display: none; }
.chart-help summary:hover, .chart-help[open] summary { color: var(--ink); }
.chart-help summary:hover::before, .chart-help[open] summary::before { background: var(--hover-wash); }
.chart-help summary:focus-visible { outline: 2px solid var(--frost); outline-offset: 2px; }
.chart-help-panel { display: none; }
.chart-help:is([open], :hover, :focus-within) .chart-help-panel {
  display: block;
  position: absolute;
  z-index: 8;
  top: calc(100% + 8px);
  left: 0;
  width: min(100%, 36rem);
  margin: 0;
  padding: 12px 16px;
  border: 1px solid var(--axis);
  border-radius: 4px;
  background: var(--page);
  color: var(--ink);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  font-size: 0.9rem;
  font-weight: 400;
}
.chart-help-panel p { margin: 0; }
.chart-help-panel p + p { margin-top: 8px; }


.lede { margin: 0; color: var(--ink-2); }


/* --- Controls ------------------------------------------------------------------------------ */

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  margin-bottom: 16px;
}

.segmented { display: inline-flex; border: 1px solid var(--axis); border-radius: 4px; overflow: hidden; }
.segmented button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-2);
  font: inherit;
  font-size: 0.87rem;
  padding: 6px 12px;
  min-height: 36px;
  cursor: pointer;
}
.segmented button + button { border-left: 1px solid var(--axis); }
.segmented button:hover { background: var(--hover-wash); }
.segmented button[aria-pressed="true"] { background: var(--ink); color: var(--page); }
.segmented button:focus-visible { outline: 2px solid var(--frost); outline-offset: -2px; }
.segmented button:disabled { color: var(--ink-3); cursor: default; }
.lang-switch button { padding-inline: 10px; min-height: 30px; }
.history-presets, .winter-presets { display: flex; flex-wrap: wrap; max-width: 100%; gap: 6px; border: 0; overflow: visible; }
.history-presets button, .history-presets button + button,
.winter-presets button, .winter-presets button + button { border: 1px solid var(--axis); border-radius: 4px; }

.toggles { display: flex; flex-wrap: wrap; gap: 4px 16px; color: var(--ink-2); font-size: 0.9rem; }
.toggles label { display: inline-flex; align-items: center; gap: 6px; min-height: 36px; cursor: pointer; }
.toggles input { accent-color: var(--ink); width: 16px; height: 16px; margin: 0; }

.more-link { color: var(--ink-2); font-size: 0.9rem; margin-left: auto; }
.more-link:hover { color: var(--ink); }

/* On wider screens the period picker stays in reach while scrolling through the charts it controls;
   on a phone it wraps to three rows, which would cover too much of the screen. */
.filter-bar {
  background: var(--page);
  border-bottom: 1px solid var(--hairline);
}
@media (min-width: 760px) {
  .filter-bar { position: sticky; top: 0; z-index: 5; }
}
.filter-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  padding-block: 10px;
}
.filter-bar + .section { border-top: 0; }
[data-view="snow"] { overflow-anchor: none; }
.date-range { display: flex; flex-wrap: wrap; gap: 8px 12px; }
.date-range label { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-2); font-size: 0.87rem; }
.date-range input {
  font: inherit;
  font-size: 0.87rem;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--axis);
  border-radius: 4px;
  padding: 4px 8px;
  min-height: 36px;
}
.date-range input:focus-visible { outline: 2px solid var(--frost); outline-offset: -1px; }
.period-note { margin: 0; color: var(--ink-3); font-size: 0.85rem; font-variant-numeric: tabular-nums; }
.winter-compare-picker { flex-basis: 100%; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; color: var(--ink-2); font-size: 0.87rem; }
.winter-compare-buttons { display: flex; flex-wrap: wrap; gap: 6px; }
.winter-compare-buttons button {
  min-height: 32px;
  padding: 4px 9px;
  border: 1px solid var(--axis);
  border-radius: 4px;
  background: transparent;
  color: var(--ink-2);
  font: inherit;
  cursor: pointer;
}
.winter-compare-buttons button:hover, .winter-compare-buttons button[aria-pressed="true"] { background: var(--hover-wash); color: var(--ink); }
.winter-compare-buttons button[aria-pressed="true"] { border-color: var(--ink-2); }
.winter-compare-buttons button[aria-pressed="false"] .comparison-key { opacity: 0.35; }
.winter-compare-buttons button:focus-visible { outline: 2px solid var(--frost); outline-offset: 2px; }

.snow-summary { margin: 0 0 12px; font-weight: 600; font-variant-numeric: tabular-nums; max-width: 62ch; }
.snow-summary:empty { display: none; }

.winter-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 48px; }
.winter-fact { position: relative; }
.winter-fact > p { margin: 8px 0 0; max-width: 48ch; font-variant-numeric: tabular-nums; }
@media (max-width: 620px) {
  .winter-facts { grid-template-columns: 1fr; }
}

.duration-key { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 14px; color: var(--ink-2); font-size: 0.85rem; }
.duration-key span { display: inline-flex; align-items: center; gap: 7px; }
.duration-key i { display: inline-block; width: 16px; height: 9px; }
.duration-total-key { background: var(--frost-wash); border: 1px solid var(--frost); }
.duration-longest-key { background: var(--frost); }
.duration-chart { display: grid; gap: 8px; max-width: 46rem; font-variant-numeric: tabular-nums; }
.duration-row { display: grid; grid-template-columns: 58px minmax(0, 1fr) 88px; align-items: center; gap: 12px; }
.duration-chart.is-comparison { max-width: 60rem; gap: 4px; }
.duration-chart.is-comparison .duration-row { grid-template-columns: 58px 86px minmax(0, 1fr) 88px; }
.duration-chart.is-comparison .duration-row.starts-depth:not(:first-child) { margin-top: 10px; }
.duration-depth { color: var(--ink-2); }
.duration-year { color: var(--ink-2); font-size: 0.8rem; white-space: nowrap; }
.duration-year .comparison-key { width: 12px; margin-right: 4px; }
.duration-track { position: relative; display: block; height: 15px; background: var(--hover-wash); }
.duration-total, .duration-longest { position: absolute; inset: 0 auto 0 0; display: block; }
.duration-total { background: var(--frost); opacity: 0.22; }
.duration-longest { background: var(--frost); height: 5px; top: 5px; }
.duration-values { text-align: right; font-size: 0.87rem; white-space: nowrap; }
.snow-coverage, .duration-coverage { margin-top: 12px; }

.comparison-note { margin: 12px 0 18px; }
.comparison-table th, .comparison-table td { padding-block: 8px; }
.comparison-key { display: inline-block; width: 16px; height: 3px; margin-right: 8px; vertical-align: middle; }
.comparison-status { display: inline-block; margin-left: 7px; color: var(--ink-3); font-size: 0.78rem; }

/* --- Figures ------------------------------------------------------------------------------- */

.figure { margin: 0; }

.hero-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px 40px;
  align-items: start;
}
@media (max-width: 760px) {
  .hero-body { grid-template-columns: minmax(0, 1fr); }
}

.profile-chart { width: 100%; position: relative; }
.profile-chart svg { display: block; width: 100%; height: auto; overflow: visible; }

.key-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin-top: 8px;
  color: var(--ink-2);
  font-size: 0.85rem;
}
.key { display: inline-flex; align-items: center; gap: 8px; }
.key-summary { flex-basis: 100%; color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.key-line { display: inline-block; width: 18px; height: 0; border-top: 2px solid currentColor; }
.key-swatch { display: inline-block; width: 14px; height: 10px; }

svg text { font-family: var(--font); fill: var(--ink-3); font-size: 12px; }
svg .label-strong { fill: var(--ink); font-weight: 600; }
svg .label-2 { fill: var(--ink-2); }
svg .halo { paint-order: stroke; stroke: var(--page); stroke-width: 4px; stroke-linejoin: round; }
svg .tick-num { font-variant-numeric: tabular-nums; }

/* --- Tables -------------------------------------------------------------------------------- */

.table-scroll { overflow-x: auto; }

.data-table {
  border-collapse: collapse;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.data-table th, .data-table td { padding: 3px 0 3px 18px; text-align: right; }
.data-table th:first-child, .data-table td:first-child { padding-left: 0; text-align: left; }
.data-table thead .key-line { width: 12px; margin-right: 6px; vertical-align: middle; }
.data-table thead th { color: var(--ink-3); font-weight: 500; font-size: 0.8rem; border-bottom: 1px solid var(--hairline); padding-bottom: 6px; }
.data-table tbody th { font-weight: 400; color: var(--ink-2); }
.data-table .group-row th { color: var(--ink-3); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; padding-top: 12px; }
.data-table tr.is-hover td, .data-table tr.is-hover th { background: var(--hover-wash); }
.data-table .dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 8px; vertical-align: 1px; }
.data-table .now { color: var(--ink); font-weight: 600; }
.data-table .muted { color: var(--ink-3); }
.data-table .is-frozen { color: var(--frost); }

.table-details { margin-top: 16px; }
.table-details summary { cursor: pointer; color: var(--ink-2); font-size: 0.9rem; min-height: 36px; display: flex; align-items: center; }
.table-details[open] summary { margin-bottom: 8px; }

/* --- uPlot --------------------------------------------------------------------------------- */

.uplot-host { width: 100%; min-height: 200px; }
.uplot { font-family: var(--font); color: var(--ink-2); }
.u-legend { font-size: 0.82rem; text-align: left; margin-top: 8px; }
.u-legend .u-marker { width: 14px; height: 5px; border-radius: 0; border-width: 0 0 3px !important; background: transparent !important; }
.u-legend th { font-weight: 400; color: var(--ink-2); }
.u-legend td { font-variant-numeric: tabular-nums; color: var(--ink); }
.u-legend .u-series { padding-right: 8px; }
.u-legend .u-off > * { opacity: 0.35; }
.winter-chart .u-legend .u-series { pointer-events: none; }
.u-select { background: var(--hover-wash); }
.u-cursor-x { border-right: 1px solid var(--ink-3) !important; }
.u-cursor-y { display: none; }

/* --- Heatmap ------------------------------------------------------------------------------- */

.heatmap { position: relative; width: 100%; }
.heatmap canvas { display: block; width: 100%; touch-action: pan-y; }

.scale-legend { margin-top: 12px; color: var(--ink-3); font-size: 0.8rem; max-width: 26rem; }
.scale-bar { height: 10px; }
.scale-ticks { position: relative; height: 18px; font-variant-numeric: tabular-nums; }
.scale-ticks span { position: absolute; top: 2px; transform: translateX(-50%); }
.scale-ticks span.is-zero { color: var(--ink); font-weight: 600; }
.scale-missing { display: inline-flex; align-items: center; gap: 6px; margin-top: 4px; }
.scale-missing i { display: inline-block; width: 14px; height: 10px; border: 1px solid var(--axis); }

/* --- Tooltip ------------------------------------------------------------------------------- */

.tooltip {
  position: fixed;
  z-index: 10;
  pointer-events: none;
  background: var(--page);
  color: var(--ink);
  border: 1px solid var(--axis);
  border-radius: 4px;
  padding: 6px 10px;
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  max-width: 16rem;
}
.tooltip .tt-title { color: var(--ink-2); margin-bottom: 2px; }
.tooltip .tt-row { display: flex; align-items: center; gap: 8px; justify-content: space-between; }
.tooltip .tt-row strong { font-weight: 600; }
.tooltip .tt-key { display: inline-block; width: 12px; border-top: 2px solid currentColor; }

.empty { color: var(--ink-3); }

/* --- Footer -------------------------------------------------------------------------------- */

.footer {
  border-top: 1px solid var(--hairline);
  color: var(--ink-2);
  font-size: 0.87rem;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.footer-grid { padding-block: 32px 48px; display: grid; gap: 8px; max-width: 72rem; }
.footer p { margin: 0; max-width: 70ch; }
.prototype-note { color: var(--t-warm-3); }