:root {
  color-scheme: light;
  --bg: #f4f6fb;
  --panel: #ffffff;
  --panel-border: #d7deea;
  --text: #1f2937;
  --muted: #637083;
  --accent: #1f6feb;
  --accent-soft: #e8f0ff;
  --danger: #c53434;
  --shadow: 0 12px 30px rgba(30, 42, 64, 0.08);
  --radius: 18px;
  --fuel-regular: #1f6feb;
  --fuel-premium: #d97706;
  --fuel-diesel: #059669;
  --fuel-kerosene: #7c3aed;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

button, input { font: inherit; }
button { cursor: pointer; }

a { color: var(--accent); }

.page-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 24px;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.8rem, 2.8vw, 2.6rem);
}

.hero-copy {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.6;
  max-width: 760px;
}

.hero-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 132px;
  padding: 12px 14px;
  border-radius: 999px;
  border: 1px solid var(--panel-border);
  background: #fff;
  font-weight: 700;
}

.hero-status[data-status="loading"] {
  color: #8a6b00;
  background: #fff8db;
  border-color: #ebd48a;
}

.hero-status[data-status="ok"] {
  color: #0f6b42;
  background: #eafaf1;
  border-color: #9fdbba;
}

.hero-status[data-status="error"] {
  color: #b42318;
  background: #fff0ef;
  border-color: #f0b6b2;
}

.layout-grid {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 20px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.control-panel {
  padding: 20px;
  position: sticky;
  top: 16px;
  height: fit-content;
}

.control-group + .control-group {
  margin-top: 18px;
}

.control-label {
  display: block;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--muted);
  font-weight: 600;
}

.segmented, .fuel-tabs, .period-buttons, .legend-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.segmented-button,
.fuel-tab,
.chip-button,
.legend-chip {
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: #fff;
  padding: 10px 14px;
  transition: all 0.18s ease;
}

.segmented-button.is-active,
.fuel-tab.is-active,
.chip-button.is-active,
.legend-chip.is-active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 700;
}

.text-input {
  width: 100%;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 12px 14px;
}

.content-column {
  display: grid;
  gap: 20px;
}

.summary-panel,
.chart-panel,
.ranking-panel,
.prediction-panel {
  padding: 20px;
}

.summary-header,
.chart-header,
.ranking-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.summary-header h2,
.chart-header h2,
.ranking-header h2 {
  margin: 0;
  font-size: 1.25rem;
}

.summary-header p,
.chart-header p,
.ranking-header p {
  margin: 8px 0 0;
  color: var(--muted);
}

.meta-block {
  text-align: right;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.latest-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.latest-card,
.hero-card,
.prediction-card,
.prediction-hero-card {
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 16px;
  background: linear-gradient(180deg, #fff, #f8fbff);
}

.hero-card {
  display: grid;
  gap: 8px;
}

.latest-card-label,
.hero-card-label {
  color: var(--muted);
  font-size: 14px;
}

.latest-card-value,
.hero-card-value {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
}

.latest-card-sub,
.hero-card-sub,
.prediction-meta-line {
  color: var(--muted);
  font-size: 13px;
}

.chart-root {
  width: 100%;
}

.chart-svg {
  width: 100%;
  height: 360px;
  display: block;
}

.chart-empty,
.loading-state,
.empty-state {
  min-height: 180px;
  display: grid;
  place-items: center;
  color: var(--muted);
}

.legend-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 12px 0 0;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 999px;
}

.axis-label {
  fill: var(--muted);
  font-size: 12px;
}

.grid-line {
  stroke: #e8eef8;
  stroke-width: 1;
}

.axis-line {
  stroke: #cfd8e6;
  stroke-width: 1;
}

.series-line {
  fill: none;
  stroke-width: 3;
}

.series-point {
  stroke: #fff;
  stroke-width: 2;
}

.ranking-table-wrap {
  overflow-x: auto;
}

.ranking-table {
  width: 100%;
  border-collapse: collapse;
}

.ranking-table th,
.ranking-table td {
  padding: 12px 10px;
  border-bottom: 1px solid #edf2f8;
  text-align: left;
  white-space: nowrap;
}

.ranking-table th {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.rank-pill {
  min-width: 34px;
  display: inline-grid;
  place-items: center;
  padding: 5px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
}

.prediction-grid,
.prediction-detail-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1.2fr 1fr;
  margin-bottom: 14px;
}

.prediction-eyebrow {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 8px;
}

.prediction-main-value {
  font-size: clamp(2rem, 3.8vw, 3rem);
  font-weight: 900;
  margin-bottom: 10px;
}

.prediction-main-value span {
  font-size: 0.45em;
  color: var(--muted);
}

.prediction-change,
.driver-badge {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 700;
  margin-bottom: 10px;
}

.prediction-change.is-up,
.driver-badge.is-up {
  background: #fff3e8;
  color: #b45309;
}

.prediction-change.is-down,
.driver-badge.is-down {
  background: #edf7ff;
  color: #1d4ed8;
}

.prediction-range {
  font-weight: 700;
  margin-bottom: 10px;
}

.driver-list {
  display: grid;
  gap: 12px;
}

.driver-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  border-top: 1px solid #edf2f8;
  padding-top: 12px;
}

.driver-item:first-child {
  border-top: none;
  padding-top: 0;
}

.driver-summary {
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
}

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

.prediction-def-list div,
.prediction-source-list div {
  display: grid;
  gap: 4px;
}

.prediction-def-list dt,
.prediction-source-list strong {
  color: var(--muted);
  font-size: 13px;
}

.disclaimer-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.6;
}

.prediction-footer-meta {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

.hidden { display: none !important; }
.error-banner {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  background: #fff2f2;
  color: var(--danger);
  border: 1px solid #ffc9c9;
}

@media (max-width: 960px) {
  .layout-grid {
    grid-template-columns: 1fr;
  }

  .control-panel {
    position: static;
  }

  .summary-header,
  .chart-header,
  .ranking-header,
  .hero,
  .prediction-grid,
  .prediction-detail-grid,
  .driver-item {
    flex-direction: column;
    grid-template-columns: 1fr;
  }

  .meta-block {
    text-align: left;
  }
}

@media (max-width: 768px) {
  .page-shell {
    padding: 16px;
  }

  .hero {
    gap: 12px;
  }

  .summary-header,
  .chart-header,
  .ranking-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .meta-block {
    text-align: left;
  }

  .chart-svg {
    height: 300px;
  }

  .ranking-table {
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .panel,
  .summary-panel,
  .chart-panel,
  .ranking-panel,
  .prediction-panel {
    padding: 16px;
  }

  .fuel-tabs,
  .period-buttons,
  .segmented {
    gap: 8px;
  }

  .segmented-button,
  .fuel-tab,
  .chip-button,
  .legend-chip {
    width: 100%;
    justify-content: center;
  }

  .chart-svg {
    height: 260px;
  }

  .ranking-table th,
  .ranking-table td {
    white-space: nowrap;
  }
}


.prediction-unavailable {
  border: 1px dashed #cbd5e1;
  border-radius: 14px;
  padding: 18px;
  background: #f8fafc;
  color: #334155;
}

.prediction-unavailable p {
  margin: 8px 0 0;
}

.prediction-range-note {
  margin-top: 10px;
  color: #475569;
  font-size: 0.95rem;
}

.prediction-note {
  margin-top: 0.75rem;
  color: #4b5563;
  font-size: 0.94rem;
  line-height: 1.6;
}

.warning-card {
  border-left: 4px solid #d97706;
}