:root {
  color-scheme: light dark;
  --ink: #162033;
  --muted: #5f6b7a;
  --surface: #ffffff;
  --canvas: #f4f7fb;
  --line: #d9e1eb;
  --accent: #075985;
  --focus: #f59e0b;
  --error: #b42318;
  --radius: 14px;
  /* Highcharts v13 palette variables are local because the report CSP blocks runtime style injection. */
  --highcharts-background-color: #ffffff;
  --highcharts-neutral-color-0: #ffffff;
  --highcharts-neutral-color-10: #e8e9eb;
  --highcharts-neutral-color-20: #d0d2d6;
  --highcharts-neutral-color-30: #b9bcc2;
  --highcharts-neutral-color-40: #a1a6ad;
  --highcharts-neutral-color-50: #8b9099;
  --highcharts-neutral-color-60: #737986;
  --highcharts-neutral-color-70: #5c6471;
  --highcharts-neutral-color-80: #454d5c;
  --highcharts-neutral-color-90: #2d3847;
  --highcharts-neutral-color-100: #162033;
  --highcharts-highlight-color-0: #ffffff;
  --highcharts-highlight-color-10: #e6eef3;
  --highcharts-highlight-color-20: #cedee7;
  --highcharts-highlight-color-30: #b5cdd9;
  --highcharts-highlight-color-40: #9dbdce;
  --highcharts-highlight-color-50: #83acc2;
  --highcharts-highlight-color-60: #6b9bb5;
  --highcharts-highlight-color-70: #528aaa;
  --highcharts-highlight-color-80: #397a9f;
  --highcharts-highlight-color-90: #216993;
  --highcharts-highlight-color-100: #075985;
  --highcharts-color-0: #0072B2;
  --highcharts-color-1: #D55E00;
  --highcharts-color-2: #009E73;
  --highcharts-color-3: #CC79A7;
  --highcharts-color-4: #E69F00;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--canvas);
  color: var(--ink);
  font: 16px/1.55 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }

.page-width { width: min(1180px, calc(100% - 2rem)); margin-inline: auto; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 10; padding: .55rem .8rem; background: var(--ink); color: #fff; border-radius: 0 0 6px 6px; }
.skip-link:focus { top: 0; }

.site-header { background: linear-gradient(125deg, #082f49, #075985); color: #fff; padding: clamp(2rem, 5vw, 4.5rem) 0 2.5rem; }
.header-content { max-width: 1180px; }
.eyebrow { margin: 0 0 .25rem; color: #487a9e; font-size: .77rem; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; }
.site-header .eyebrow { color: #b8def5; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: .35rem; font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.1; letter-spacing: -.04em; }
h2 { margin-bottom: .35rem; font-size: clamp(1.35rem, 3vw, 1.75rem); line-height: 1.2; letter-spacing: -.02em; }
.lede { margin-bottom: 0; color: #dceefa; font-size: 1.08rem; }

.report-nav { position: sticky; top: 0; z-index: 4; background: rgba(255, 255, 255, .96); border-bottom: 1px solid var(--line); backdrop-filter: blur(8px); }
.report-nav > div { display: flex; overflow-x: auto; gap: .25rem; }
.report-nav a { flex: 0 0 auto; padding: .75rem .9rem; color: var(--ink); font-size: .94rem; font-weight: 650; text-decoration: none; }
.report-nav a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: .25em; }

main { padding-block: 1.5rem 3rem; }
.notice { margin: 0 0 1.25rem; padding: .8rem 1rem; background: #eaf4fb; border-left: 4px solid var(--accent); border-radius: 4px; color: #17466a; }
.notice[hidden] { display: none; }
.notice-error { background: #fef0ef; border-color: var(--error); color: #7a271a; }

.overview, .metric-section, .chart-section { scroll-margin-top: 4rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 8px 28px rgba(31, 54, 88, .06); }
.overview { padding: clamp(1rem, 3vw, 1.75rem); margin-bottom: 1.25rem; }
.metric-section { padding: clamp(1rem, 3vw, 1.75rem); margin-bottom: 1.25rem; }
.chart-section { padding: clamp(1rem, 3vw, 1.75rem); margin-top: 1.25rem; }
.section-heading { display: flex; gap: 1.5rem; justify-content: space-between; align-items: start; margin-bottom: 1.1rem; }
.section-heading > * { margin-bottom: 0; }
.chart-heading p:not(.eyebrow) { max-width: 44rem; color: var(--muted); }
.metric-heading p:not(.eyebrow) { max-width: 44rem; color: var(--muted); }
.method-note { max-width: 28rem; color: var(--muted); font-size: .9rem; }

.summary-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .75rem; margin: 0 0 1.25rem; }
.summary-card { min-width: 0; padding: 1rem; background: #f7fafc; border: 1px solid var(--line); border-radius: 10px; }
.summary-card dt { color: var(--muted); font-size: .85rem; font-weight: 650; }
.summary-card dd { margin: .25rem 0 0; font-size: clamp(1.2rem, 2.5vw, 1.75rem); font-weight: 750; letter-spacing: -.03em; overflow-wrap: anywhere; }
.summary-card dd.small-value { font-size: 1rem; letter-spacing: 0; }

.plant-filter { display: flex; align-items: center; gap: 1rem; min-width: 0; margin: 0; padding: .65rem .85rem .8rem; border: 1px solid var(--line); border-radius: 9px; }
.plant-filter:disabled { opacity: .72; }
.plant-filter legend { padding: 0 .25rem; color: var(--muted); font-size: .88rem; font-weight: 650; }
.filter-options { display: flex; flex-wrap: wrap; gap: .65rem 1rem; }
.filter-option { display: inline-flex; align-items: center; gap: .4rem; cursor: pointer; font-size: .94rem; }
.filter-option input { accent-color: var(--accent); }
.series-dot { width: .72rem; height: .72rem; border-radius: 50%; background: var(--series-color); }

.production-metrics { display: grid; gap: 1.25rem; }
.metric-year { padding-top: 1.1rem; border-top: 1px solid var(--line); }
.metric-year:first-child { padding-top: 0; border-top: 0; }
.metric-year h3 { margin: 0 0 .7rem; color: var(--accent); font-size: 1.05rem; letter-spacing: .02em; }
.production-card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: .75rem; }
.production-card { min-width: 0; padding: 1rem; border: 1px solid var(--line); border-top: 4px solid var(--plant-color); border-radius: 10px; background: linear-gradient(135deg, #fff, #f7fafc); }
.production-card h4 { margin: 0; font-size: 1rem; line-height: 1.3; }
.recorded-days, .production-card-empty { margin: .25rem 0 .85rem; color: var(--muted); font-size: .8rem; }
.production-card-empty { min-height: 4.7rem; display: grid; align-content: center; }
.threshold-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .45rem; margin: 0; }
.threshold-stat { min-width: 0; padding: .55rem .6rem; background: rgba(255, 255, 255, .8); border: 1px solid #e6edf4; border-radius: 7px; }
.threshold-stat dt { color: var(--muted); font-size: .72rem; font-weight: 700; line-height: 1.2; }
.threshold-stat dd { margin: .08rem 0 0; font-size: 1.35rem; font-weight: 750; line-height: 1.1; letter-spacing: -.03em; }
.threshold-stat span { display: block; margin-top: .18rem; color: var(--accent); font-size: .72rem; font-weight: 700; }
.metric-footnote, .metrics-empty { margin: 1rem 0 0; color: var(--muted); font-size: .86rem; }

.chart-container { min-height: 380px; width: 100%; }
.chart-empty { display: grid; min-height: 260px; place-items: center; padding: 1rem; color: var(--muted); text-align: center; }
.site-footer { padding: 1.5rem 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .88rem; }

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e5eef7;
    --muted: #aab7c7;
    --surface: #152235;
    --canvas: #0b111c;
    --line: #314155;
    --accent: #7dd3fc;
    --focus: #fbbf24;
    --error: #fb7185;
    --highcharts-background-color: #101827;
    --highcharts-neutral-color-0: #101827;
    --highcharts-neutral-color-10: #29303c;
    --highcharts-neutral-color-20: #3a4350;
    --highcharts-neutral-color-30: #535966;
    --highcharts-neutral-color-40: #6c7278;
    --highcharts-neutral-color-50: #7b838f;
    --highcharts-neutral-color-60: #9098a4;
    --highcharts-neutral-color-70: #a5aebb;
    --highcharts-neutral-color-80: #bac3cd;
    --highcharts-neutral-color-90: #cfd8e2;
    --highcharts-neutral-color-100: #e5eef7;
    --highcharts-highlight-color-0: #101827;
    --highcharts-highlight-color-10: #1b2b3c;
    --highcharts-highlight-color-20: #263d52;
    --highcharts-highlight-color-30: #315067;
    --highcharts-highlight-color-40: #3c637c;
    --highcharts-highlight-color-50: #477692;
    --highcharts-highlight-color-60: #5188a7;
    --highcharts-highlight-color-70: #5c9bbc;
    --highcharts-highlight-color-80: #67aed1;
    --highcharts-highlight-color-90: #72c0e7;
    --highcharts-highlight-color-100: #7dd3fc;
  }

  .report-nav { background: rgba(16, 24, 39, .96); }
  .notice { background: #12334b; color: #d9efff; }
  .notice-error { background: #4b1f29; color: #ffe4e6; }
  .summary-card { background: #1b2a3e; }
  .production-card { background: linear-gradient(135deg, #1b2a3e, #152235); }
  .threshold-stat { background: rgba(11, 17, 28, .55); border-color: #314155; }
}

@media (max-width: 720px) {
  .page-width { width: min(100% - 1rem, 1180px); }
  main { padding-top: 1rem; }
  .site-header { padding-top: 2rem; }
  .section-heading { display: block; }
  .method-note { margin-top: .8rem; }
  .summary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chart-container { min-height: 320px; }
}

@media (max-width: 390px) {
  .summary-grid { grid-template-columns: 1fr; }
}

@media print {
  body { background: #fff; font-size: 11pt; }
  .site-header { padding: 1rem 0; color: #000; background: none; }
  .site-header .eyebrow, .lede { color: #333; }
  .report-nav, .skip-link, .plant-filter, .notice { display: none !important; }
  main { padding: 0; }
  .overview, .metric-section, .chart-section { box-shadow: none; break-inside: avoid; border-color: #aaa; }
  .chart-container { min-height: 300px; }
}