:root {
  color-scheme: dark;
  --bg: #0b0b0b;
  --surface: #171717;
  --surface-2: #212121;
  --border: #353535;
  --text: #f7f7f2;
  --muted: #b9b9b9;
  --dim: #858585;
  --accent: #f36458;
  --blue: #4da3ff;
  --fresh: #37cd84;
  --warning: #f1c21b;
  --solar: #ffd700;
  --wind: #2e8b57;
  --gas: #ff8c00;
  --coal: #696969;
  --radius: 6px;
  --max: 1180px;
  --mono: "SFMono-Regular", "IBM Plex Mono", Consolas, monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--accent);
  color: #fff;
}

.skip-link:focus {
  top: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 28px;
  background: rgba(11, 11, 11, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-width: 260px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 13px;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 15px;
  line-height: 1.2;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.2;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-nav a {
  min-height: 36px;
  padding: 7px 10px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  border-color: var(--blue);
  outline: none;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.82fr);
  gap: 32px;
  align-items: stretch;
  width: min(100%, var(--max));
  min-height: 620px;
  margin: 0 auto;
  padding: 88px 28px 56px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: 68px;
  font-weight: 500;
  line-height: 1.04;
}

.lead {
  max-width: 680px;
  color: var(--muted);
  font-size: 21px;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.primary-action,
.status-pill,
.issue-card a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
  text-decoration: none;
}

.primary-action {
  background: var(--accent);
  color: #fff;
}

.primary-action:hover,
.primary-action:focus-visible {
  background: var(--blue);
  outline: none;
}

.status-pill {
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--mono);
}

.status-pill.fresh {
  border-color: rgba(55, 205, 132, 0.55);
  color: var(--fresh);
}

.status-pill.stale {
  border-color: rgba(241, 194, 27, 0.65);
  color: var(--warning);
}

.hero-visual {
  position: relative;
  overflow: hidden;
  min-height: 460px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #101010;
}

.visual-grid {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.65;
}

.mix-panel {
  position: absolute;
  inset: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.panel-heading span {
  color: var(--dim);
  font-family: var(--mono);
  font-size: 12px;
}

.panel-heading strong {
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
}

.mix-bars {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.mix-row {
  display: grid;
  grid-template-columns: 88px 1fr 92px;
  gap: 10px;
  align-items: center;
  min-height: 34px;
}

.mix-label,
.mix-value {
  color: var(--muted);
  font-size: 13px;
}

.mix-value {
  text-align: right;
  font-family: var(--mono);
}

.mix-track {
  position: relative;
  overflow: hidden;
  height: 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #0d0d0d;
}

.mix-shadow {
  position: absolute;
  top: 2px;
  bottom: 2px;
  left: 0;
  min-width: 2px;
  border-right: 1px solid rgba(255, 255, 255, 0.62);
  background: rgba(255, 255, 255, 0.16);
}

.mix-fill {
  position: relative;
  z-index: 1;
  height: 100%;
  min-width: 2px;
}

.mix-reference-note {
  margin: 2px 0 0;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.45;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 0 28px 36px;
  gap: 12px;
}

.metric-strip article,
.chart-panel,
.reading-notes article,
.issue-card,
.limits-panel,
.source-row,
.flow li {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.metric-strip article {
  min-height: 156px;
  padding: 18px;
}

.metric-strip span,
.metric-strip small {
  display: block;
  color: var(--dim);
}

.metric-strip span {
  font-family: var(--mono);
  font-size: 12px;
}

.metric-strip strong {
  display: block;
  margin: 18px 0 8px;
  font-family: var(--mono);
  font-size: 30px;
  line-height: 1.1;
}

.metric-strip small {
  font-size: 13px;
}

.section {
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 68px 28px;
}

.section-intro {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-intro h2 {
  margin-bottom: 14px;
  font-size: 38px;
  font-weight: 500;
  line-height: 1.15;
}

.section-intro p {
  color: var(--muted);
  font-size: 18px;
}

.chart-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 16px;
}

.chart-panel {
  min-height: 360px;
  padding: 18px;
}

.chart-box {
  min-height: 282px;
  margin-top: 12px;
}

.chart-box svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 280px;
}

.axis-text {
  fill: #9a9a9a;
  font-family: var(--mono);
  font-size: 11px;
}

.axis-tick {
  fill: #858585;
  font-family: var(--mono);
  font-size: 10px;
}

.chart-gridline {
  stroke: rgba(255, 255, 255, 0.08);
  stroke-dasharray: 2 5;
}

.reading-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.reading-notes article {
  padding: 22px;
}

.reading-notes h3,
.limits-panel h3,
.issue-card h3 {
  margin-bottom: 10px;
  font-size: 21px;
  font-weight: 500;
}

.reading-notes p,
.issue-card p,
.limits-panel li,
.flow p {
  color: var(--muted);
}

.issue-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.issue-card {
  min-height: 230px;
  padding: 22px;
}

.issue-card.featured {
  grid-column: span 2;
  background: var(--surface-2);
  border-color: rgba(243, 100, 88, 0.65);
}

.issue-card span,
.flow span {
  display: inline-block;
  margin-bottom: 24px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
}

.issue-card a {
  margin-top: 8px;
  background: #fff;
  color: #0b0b0b;
}

.flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  padding: 0;
  list-style: none;
}

.flow li {
  min-height: 220px;
  padding: 22px;
}

.flow strong {
  display: block;
  margin-bottom: 10px;
  font-size: 18px;
}

.source-list {
  display: grid;
  gap: 10px;
}

.source-row {
  display: grid;
  grid-template-columns: 1.2fr 110px 110px 110px 130px;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
}

.source-row strong {
  display: block;
  margin-bottom: 4px;
  font-weight: 500;
}

.source-row a {
  color: var(--muted);
  font-size: 13px;
}

.source-row span {
  color: var(--dim);
  font-family: var(--mono);
  font-size: 12px;
}

.source-status {
  display: inline-flex;
  justify-content: center;
  min-width: 78px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
}

.source-status.parsed {
  border-color: rgba(55, 205, 132, 0.55);
  color: var(--fresh);
}

.source-status.skipped {
  border-color: rgba(241, 194, 27, 0.55);
  color: var(--warning);
}

.limits-panel {
  margin-top: 16px;
  padding: 22px;
}

.limits-panel ul {
  margin: 0;
  padding-left: 20px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
  border-top: 1px solid var(--border);
  color: var(--dim);
  font-size: 13px;
}

.site-footer p {
  margin: 0;
}

.error-panel {
  padding: 16px;
  border: 1px solid rgba(241, 194, 27, 0.6);
  border-radius: var(--radius);
  color: var(--warning);
  background: rgba(241, 194, 27, 0.08);
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 56px;
  }

  h1 {
    font-size: 46px;
  }

  .metric-strip,
  .chart-grid,
  .reading-notes,
  .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .issue-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .source-row {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 14px 16px;
  }

  .brand {
    min-width: 0;
  }

  .hero,
  .section,
  .metric-strip {
    padding-left: 16px;
    padding-right: 16px;
  }

  h1 {
    font-size: 36px;
  }

  .lead {
    font-size: 18px;
  }

  .section-intro h2 {
    font-size: 30px;
  }

  .metric-strip,
  .chart-grid,
  .reading-notes,
  .issue-grid,
  .flow {
    grid-template-columns: 1fr;
  }

  .issue-card.featured {
    grid-column: span 1;
  }

  .source-row {
    grid-template-columns: 1fr;
  }

  .mix-row {
    grid-template-columns: 74px 1fr;
  }

  .mix-value {
    grid-column: 2;
    text-align: left;
  }

  .site-footer {
    flex-direction: column;
  }
}