:root {
  --paper: #d5dbd6;
  --paper-2: #c7cec8;
  --ink: #1b2421;
  --ink-soft: #3a4542;
  --gold: #d9a441;
  --teal: #1a6b72;
  --teal-2: #3d8a86;
  --seam: #6a4630;
  --coal: #3d342e;
  --gas: #c47b58;
  --biomass: #5f6b3a;
  --nuke: #8d9390;
  --wind: #6e93a3;
  --battery: #b8a46a;
  --rule: #9aa39c;
  --display: "Syne", "Arial Narrow", sans-serif;
  --serif: "Newsreader", Georgia, serif;
  --mono: "Red Hat Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.55;
}
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.shell {
  width: min(72rem, calc(100% - 2rem));
  margin-inline: auto;
}
a { color: inherit; }
a:hover { color: var(--teal); }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1.1rem 0 2rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}
.brand { text-decoration: none; }
.language-switcher a { text-decoration: none; }
.language-switcher a[aria-current="page"] { font-weight: 500; box-shadow: inset 0 -2px 0 var(--gold); }

.hero { padding-bottom: 2rem; }
.kicker {
  margin: 0 0 0.6rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
h1 {
  margin: 0 0 1rem;
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.4rem, 7vw, 5.1rem);
  line-height: 0.92;
  letter-spacing: -0.03em;
  max-width: 14ch;
}
.standfirst {
  max-width: 46rem;
  margin: 0 0 1.6rem;
  font-size: 1.2rem;
}
.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem 1.25rem;
  margin: 0 0 2.2rem;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.stats li { padding: 0.85rem 0; }
.stats .n {
  display: block;
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 500;
}
.stats .l {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.board {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 24rem);
  gap: 1.5rem 2rem;
  align-items: start;
}
.board h2 {
  margin: 0 0 0.4rem;
  font-family: var(--display);
  font-size: 1.7rem;
  letter-spacing: -0.02em;
}
.board .lead { margin: 0 0 1rem; color: var(--ink-soft); }

.ribbon-wrap, .stack-wrap {
  background: #e7ece8;
  border: 1px solid #b7bfb8;
}
.ribbon-wrap { padding: 0.6rem 0.6rem 0.2rem; }
.stack-wrap { padding: 0.75rem; }
#ribbon, #stack { display: block; width: 100%; height: auto; }
.tick {
  font-family: var(--mono);
  font-size: 0.68rem;
  fill: var(--ink-soft);
}
.fuel-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  fill: var(--ink);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: end;
  margin-top: 1rem;
}
.controls label { display: block; font-family: var(--mono); font-size: 0.75rem; margin-bottom: 0.25rem; }
.controls input[type="range"] { width: min(100%, 22rem); accent-color: var(--gold); }
.seasons { display: flex; gap: 0.4rem; }
.seasons button, .presets button {
  font-family: var(--mono);
  font-size: 0.78rem;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
  padding: 0.35rem 0.65rem;
  cursor: pointer;
}
.seasons button[aria-pressed="true"],
.presets button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.presets { display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; }
.presets span { font-family: var(--mono); font-size: 0.75rem; margin-right: 0.25rem; }
.readout {
  margin: 0.9rem 0 0;
  font-size: 1.05rem;
  max-width: 40rem;
}
.hour-face {
  font-family: var(--mono);
  font-size: 2.4rem;
  font-weight: 500;
  letter-spacing: -0.04em;
  margin: 0 0 0.35rem;
}

main { padding: 2.5rem 0 4rem; }
.prose { max-width: 42rem; }
.prose h2 {
  font-family: var(--display);
  font-size: 1.85rem;
  letter-spacing: -0.02em;
  margin: 2.4rem 0 0.7rem;
}
.prose p { margin: 0 0 1rem; }
.sources { padding-top: 1rem; border-top: 1px solid var(--rule); }
.sources ol { padding-left: 1.2rem; }
.sources li { margin: 0.4rem 0; }
.note { color: var(--ink-soft); font-size: 1rem; }

footer.shell {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
  padding: 1.4rem 0 2.2rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  border-top: 1px solid var(--rule);
}
.totop {
  text-decoration: none;
  box-shadow: inset 0 -1px 0 var(--gold);
}

@media (max-width: 800px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .board { grid-template-columns: 1fr; }
  h1 { font-size: clamp(2.1rem, 11vw, 3.4rem); }
  .standfirst { font-size: 1.08rem; }
}
@media (max-width: 420px) {
  .stats { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .stack-band, .rib-solar, .rib-hydro, .needle {
    transition: none !important;
  }
}

.stack-band, .rib-solar, .rib-hydro, .needle {
  transition: none;
}
html:not(.no-js) .stack-band,
html:not(.no-js) .rib-solar,
html:not(.no-js) .rib-hydro,
html:not(.no-js) .needle {
  transition: d 160ms linear, y 160ms linear, height 160ms linear, x 160ms linear;
}
@media (prefers-reduced-motion: reduce) {
  html:not(.no-js) .stack-band,
  html:not(.no-js) .rib-solar,
  html:not(.no-js) .rib-hydro,
  html:not(.no-js) .needle {
    transition: none;
  }
}