/* Grid carbon dashboard. Colours are role tokens; the fuel palette is the
   validated categorical set, checked in stacking order (data.js FUELS):
   light adjacent CVD ΔE ≥ 9.1, normal-vision ΔE ≥ 22.9; dark CVD ΔE ≥ 6.9
   (biomass/solar, relieved by the gaps between areas, the labelled summary
   and the table), normal-vision ΔE ≥ 19.7. Three light-mode hues are under
   3:1 on the surface, so every chart has a legend and a table view. */

:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #6b6a66;
  --grid: #e1e0d9;
  --axis: #c3c2b7;
  --border: rgba(11, 11, 11, 0.10);
  --wash: rgba(11, 11, 11, 0.06);
  --focus: #2a78d6;

  --fuel-wind: #2a78d6;
  --fuel-gas: #eb6834;
  --fuel-nuclear: #1baf7a;
  --fuel-solar: #eda100;
  --fuel-imports: #e87ba4;
  --fuel-biomass: #008300;
  --fuel-other: #4a3aa7;

  --line-measured: #0b0b0b;
  --line-forecast: #2a78d6;
  --band: rgba(42, 120, 214, 0.14);
  --band-range: rgba(11, 11, 11, 0.10);

  --good: #0ca30c;
  --warning: #fab219;
  --critical: #d03b3b;
  --better: #006300;
  --worse: #b42f2f;

  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #9c9a93;
    --grid: #2c2c2a;
    --axis: #383835;
    --border: rgba(255, 255, 255, 0.10);
    --wash: rgba(255, 255, 255, 0.06);
    --focus: #3987e5;
    --fuel-wind: #3987e5;
    --fuel-gas: #d95926;
    --fuel-nuclear: #199e70;
    --fuel-solar: #c98500;
    --fuel-imports: #d55181;
    --fuel-biomass: #008300;
    --fuel-other: #9085e9;
    --line-measured: #ffffff;
    --line-forecast: #3987e5;
    --band: rgba(57, 135, 229, 0.20);
    --band-range: rgba(255, 255, 255, 0.12);
    --better: #0ca30c;
    --worse: #e66767;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #9c9a93;
  --grid: #2c2c2a;
  --axis: #383835;
  --border: rgba(255, 255, 255, 0.10);
  --wash: rgba(255, 255, 255, 0.06);
  --focus: #3987e5;
  --fuel-wind: #3987e5;
  --fuel-gas: #d95926;
  --fuel-nuclear: #199e70;
  --fuel-solar: #c98500;
  --fuel-imports: #d55181;
  --fuel-biomass: #008300;
  --fuel-other: #9085e9;
  --line-measured: #ffffff;
  --line-forecast: #3987e5;
  --band: rgba(57, 135, 229, 0.20);
  --band-range: rgba(255, 255, 255, 0.12);
  --better: #0ca30c;
  --worse: #e66767;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 16px/1.5 var(--font);
}
a { color: inherit; text-decoration-color: var(--axis); text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
h1, h2, p { margin: 0; }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: 1rem; top: -3rem; background: var(--ink); color: var(--page); padding: 0.5rem 0.75rem; border-radius: 6px; z-index: 10; }
.skip:focus { top: 1rem; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 24px; } }

.top { padding: 28px 0 20px; }
.top__inner { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; }
.eyebrow { color: var(--ink-2); font-size: 0.875rem; }
h1 { font-size: clamp(1.6rem, 4vw, 2.25rem); line-height: 1.15; letter-spacing: -0.01em; font-weight: 650; }

.button {
  font: inherit; font-size: 0.875rem; color: var(--ink); background: var(--surface);
  border: 1px solid var(--border); border-radius: 999px; padding: 0.4rem 0.9rem; cursor: pointer; white-space: nowrap;
}
.button:hover { background: var(--wash); }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.card h2 { font-size: 1.05rem; font-weight: 600; }
.card__sub { color: var(--ink-2); font-size: 0.9rem; margin-top: 2px; max-width: 70ch; }

.status { min-height: 0; }
.status:not(:empty) { margin: 0 0 16px; padding: 10px 14px; border-radius: 8px; background: var(--wash); color: var(--ink); font-size: 0.9rem; }

/* Right now */
.now { display: grid; gap: 12px; margin-bottom: 20px; }
@media (min-width: 900px) { .now { grid-template-columns: minmax(280px, 1fr) 2fr; } }
.hero { display: flex; flex-direction: column; justify-content: center; }
.hero__label { color: var(--ink-2); font-size: 0.9rem; }
.hero__value { font-size: clamp(3rem, 9vw, 4.25rem); font-weight: 650; line-height: 1.05; letter-spacing: -0.02em; margin: 6px 0; }
.hero__unit { font-size: 1rem; font-weight: 500; color: var(--ink-2); margin-left: 8px; letter-spacing: 0; }
.delta { font-size: 0.9rem; color: var(--ink-2); }
.delta strong { font-weight: 600; }
.delta--better strong { color: var(--better); }
.delta--worse strong { color: var(--worse); }
.tiles { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 640px) { .tiles { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (min-width: 900px) { .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.tile { padding: 16px; }
.tile__label { font-size: 0.875rem; color: var(--ink-2); }
.tile__value { font-size: 1.75rem; font-weight: 600; line-height: 1.2; margin: 4px 0 2px; }
.tile__note { font-size: 0.8rem; color: var(--muted); }

/* Filters: one row above everything they scope */
.filters { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px; }
.filter {
  font: inherit; font-size: 0.875rem; color: var(--ink-2); background: transparent;
  border: 1px solid var(--border); border-radius: 999px; padding: 0.35rem 0.85rem; cursor: pointer;
}
.filter:hover { background: var(--wash); color: var(--ink); }
.filter[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--page); font-weight: 600; }

.chart-card { margin-bottom: 16px; }
.columns { display: grid; gap: 16px; }
.columns > *, .now > *, .tiles > * { min-width: 0; }  /* wide tables scroll inside their card */
@media (min-width: 900px) { .columns { grid-template-columns: 3fr 2fr; align-items: start; } }

/* Legends: swatch + ink text */
.legend { list-style: none; margin: 12px 0 4px; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 0.85rem; color: var(--ink-2); }
.legend li { display: inline-flex; align-items: center; gap: 6px; }
.legend__key { display: inline-block; flex: none; }
.legend__key--rect { width: 12px; height: 12px; border-radius: 3px; }
.legend__key--line { width: 16px; height: 2px; border-radius: 1px; }
.legend__key--band { width: 16px; height: 10px; border-radius: 2px; }

/* Charts */
.chart { position: relative; width: 100%; margin-top: 4px; }

/* Generation mix: the chart, with its legend as a summary of the period. */
.mix { display: grid; gap: 12px 24px; margin-top: 12px; }
.mix .chart { margin-top: 0; min-width: 0; }
@media (min-width: 900px) { .mix { grid-template-columns: minmax(0, 1fr) 15rem; } .mix__summary { order: 2; } }
.mix__summary-title { margin: 0 0 6px; font-size: 0.8rem; color: var(--muted); }
.mix-summary { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 20px; font-size: 0.85rem; color: var(--ink-2); }
@media (min-width: 900px) { .mix-summary { grid-template-columns: minmax(0, 1fr); gap: 7px; } }
.mix-summary li { display: grid; grid-template-columns: 12px minmax(0, 1fr) auto; grid-template-rows: auto 4px; align-items: center; column-gap: 8px; row-gap: 3px; }
.mix-summary__label { min-width: 0; }
.mix-summary__value { color: var(--ink); font-variant-numeric: tabular-nums; }
.mix-summary__track { grid-column: 2 / 4; height: 4px; border-radius: 2px; background: var(--wash); overflow: hidden; }
.mix-summary__bar { display: block; height: 100%; border-radius: 2px; }
.chart.is-loading { opacity: 0.5; transition: opacity 0.2s; }
.chart__svg { display: block; width: 100%; height: auto; overflow: visible; touch-action: pan-y; }
.chart__svg:focus-visible { outline-offset: 4px; }
.chart__gridline { stroke: var(--grid); stroke-width: 1; shape-rendering: crispEdges; }
.chart__baseline { stroke: var(--axis); stroke-width: 1; shape-rendering: crispEdges; }
.chart__tick { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.chart__label { fill: var(--ink-2); font-size: 12px; }
.chart__line { fill: none; stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart__band { stroke: none; }
.chart__area { stroke: var(--surface); stroke-width: 2; stroke-linejoin: round; }
.chart__area--dense { stroke-width: 1; }  /* many points per pixel: a 2px seam would be all you see */
.chart__now { stroke: var(--axis); stroke-width: 1; }
.chart__crossline { stroke: var(--muted); stroke-width: 1; shape-rendering: crispEdges; }
.chart__dot { stroke: var(--surface); stroke-width: 2; }
.chart__empty { color: var(--muted); padding: 48px 0; text-align: center; }
.chart__tooltip {
  position: absolute; z-index: 2; pointer-events: none; min-width: 160px; max-width: 240px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12); padding: 8px 10px; font-size: 0.8rem;
}
.chart__tooltip-title { color: var(--ink-2); margin-bottom: 4px; }
.chart__tooltip-row { display: flex; align-items: center; gap: 6px; line-height: 1.6; }
.chart__tooltip-row strong { font-variant-numeric: tabular-nums; min-width: 3.5em; }
.chart__tooltip-row span:last-child { color: var(--ink-2); }
.chart__key { display: inline-block; width: 12px; height: 2px; border-radius: 1px; flex: none; }

/* Tables */
.table-view { margin-top: 12px; font-size: 0.875rem; }
.table-view summary { cursor: pointer; color: var(--ink-2); width: fit-content; }
.table-view summary:hover { color: var(--ink); }
.table-wrap { overflow-x: auto; max-height: 420px; overflow-y: auto; }
.table-view .table-wrap { margin-top: 8px; }
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
th, td { text-align: left; padding: 6px 10px 6px 0; border-bottom: 1px solid var(--grid); white-space: nowrap; }
th { color: var(--ink-2); font-weight: 600; position: sticky; top: 0; background: var(--surface); }
.num { text-align: right; font-variant-numeric: tabular-nums; }
#accuracy { margin-top: 12px; max-height: none; }
.skill-better { color: var(--better); font-weight: 600; }
.skill-worse { color: var(--worse); font-weight: 600; }
.note { color: var(--ink-2); font-size: 0.875rem; margin-top: 12px; }

/* Pipeline health: status colour always paired with an icon and a label */
.health { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 12px; }
.health li { display: grid; grid-template-columns: 22px 1fr; gap: 2px 10px; align-items: start; }
.health__icon {
  grid-row: span 2; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center;
  font-size: 13px; font-weight: 700; color: #fff; margin-top: 1px;
}
.health__icon--good { background: var(--good); }
.health__icon--warning { background: var(--warning); color: #0b0b0b; }
.health__icon--critical { background: var(--critical); }
.health__icon--unknown { background: var(--axis); color: var(--ink); }
.health__title { font-weight: 600; }
.health__detail { color: var(--ink-2); font-size: 0.875rem; }

.foot { margin-top: 40px; padding: 24px 0 40px; border-top: 1px solid var(--border); color: var(--ink-2); font-size: 0.875rem; }
.foot__inner { display: grid; gap: 6px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
@media (forced-colors: active) {
  .chart__line { stroke: CanvasText !important; }
  .filter[aria-pressed="true"] { outline: 2px solid Highlight; }
}