:root {
  color-scheme: dark;
  --bg: #08111f;
  --panel: rgba(12, 21, 37, 0.86);
  --panel-border: rgba(148, 163, 184, 0.18);
  --text: #e5eefb;
  --muted: #9fb2cc;
  --accent: #67e8f9;
  --accent-2: #818cf8;
  --cool: #38bdf8;
  --heat: #fb7185;
  --success: #4ade80;
  --warning: #fbbf24;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
  --radius: 22px;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(59,130,246,0.18), transparent 26%),
    radial-gradient(circle at top right, rgba(236,72,153,0.12), transparent 24%),
    linear-gradient(180deg, #091120 0%, #07101b 100%);
  color: var(--text);
}

.page-shell {
  width: min(1480px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0 40px;
}

.hero, .panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero {
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: 24px;
  padding: 28px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 700;
}

.hero h1, .panel h2, .chart-head h3 { margin: 0; }
.hero h1 { font-size: clamp(2rem, 4vw, 3.3rem); line-height: 1.04; }
.hero-copy, .panel-head p, .chart-head p, .summary-card, .reference-card p { color: var(--muted); }
.hero-copy { font-size: 1rem; margin: 14px 0 0; max-width: 70ch; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-content: start;
}

.stat-pill, .metric-card, .equipment-card, .chart-card, .summary-card, .reference-card {
  background: rgba(15, 27, 47, 0.88);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 18px;
}

.stat-pill {
  padding: 18px 16px;
}
.stat-pill span {
  display: block;
  font-size: 1.7rem;
  font-weight: 800;
  color: #ffffff;
}
.stat-pill label {
  display: block;
  margin-top: 4px;
  font-size: 0.86rem;
  color: var(--muted);
}

.layout-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
}
.panel {
  padding: 24px;
}
.panel-data {
  grid-column: 1 / -1;
}
.panel-head {
  margin-bottom: 18px;
}
.panel-head p {
  margin: 8px 0 0;
}

.form-grid, .equipment-grid, .metric-grid, .charts-grid, .references-grid {
  display: grid;
  gap: 16px;
}
.form-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.equipment-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
}
.metric-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.charts-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
}
.references-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
}

label span, .section-label {
  display: block;
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 8px;
}

label select,
label input,
.data-toolbar input {
  width: 100%;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  background: rgba(8, 16, 29, 0.88);
  color: var(--text);
  padding: 12px 14px;
  font-size: 0.97rem;
  outline: none;
}
label select:focus,
label input:focus,
.data-toolbar input:focus {
  border-color: rgba(103, 232, 249, 0.7);
  box-shadow: 0 0 0 3px rgba(103, 232, 249, 0.14);
}

.region-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.region-button,
.primary-button,
.ghost-button {
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  cursor: pointer;
  transition: 160ms ease;
}
.region-button {
  background: rgba(15, 27, 47, 0.88);
  color: var(--text);
  padding: 10px 14px;
}
.region-button small {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
}
.region-button.active {
  border-color: rgba(103, 232, 249, 0.7);
  box-shadow: inset 0 0 0 1px rgba(103, 232, 249, 0.5), 0 8px 20px rgba(56, 189, 248, 0.12);
}
.primary-button {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #05111e;
  font-weight: 800;
  padding: 13px 18px;
}
.ghost-button {
  background: transparent;
  color: var(--text);
  padding: 13px 18px;
}
.primary-button:hover, .ghost-button:hover, .region-button:hover { transform: translateY(-1px); }

.equipment-card, .chart-card, .summary-card, .reference-card, .metric-card {
  padding: 18px;
}
.equipment-card h3,
.chart-head h3,
.reference-card h3 { margin: 0 0 14px; }
.accent-cool { box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.16); }
.accent-heat { box-shadow: inset 0 0 0 1px rgba(251, 113, 133, 0.16); }

.actions-row {
  margin-top: 18px;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  align-items: end;
}
.actions-group {
  display: flex;
  gap: 12px;
}
.utility-rate {
  min-width: 240px;
}

.metric-card label {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  margin-bottom: 8px;
}
.metric-card strong {
  font-size: 1.6rem;
  display: block;
}
.metric-card.highlight {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.14), rgba(59, 130, 246, 0.12));
}

.chart-slot {
  min-height: 280px;
}
.chart-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: 14px;
  align-items: end;
  min-height: 240px;
}
.chart-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.chart-bars {
  min-height: 210px;
  display: flex;
  align-items: end;
  gap: 10px;
}
.chart-bar-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.chart-value {
  font-size: 0.8rem;
  color: var(--muted);
}
.chart-bar {
  width: 100%;
  min-width: 28px;
  border-radius: 16px 16px 8px 8px;
  background: linear-gradient(180deg, rgba(103, 232, 249, 0.92), rgba(59, 130, 246, 0.5));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.25);
}
.chart-bar.heat { background: linear-gradient(180deg, rgba(251, 113, 133, 0.92), rgba(190, 24, 93, 0.5)); }
.chart-bar.savings { background: linear-gradient(180deg, rgba(74, 222, 128, 0.96), rgba(22, 163, 74, 0.55)); }
.chart-legend, .chart-label { font-size: 0.8rem; color: var(--muted); text-align: center; }
.chart-sublegend {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.82rem;
}
.chart-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  display: inline-block;
  margin-right: 6px;
}
.chart-dot.cool { background: var(--cool); }
.chart-dot.heat { background: var(--heat); }
.chart-dot.savings { background: var(--success); }

.summary-card {
  margin-top: 18px;
  line-height: 1.6;
}
.summary-card strong { color: #fff; }

.data-toolbar {
  margin-bottom: 14px;
}
.city-search-field,
.city-search-results,
.selected-city-note {
  grid-column: 1 / -1;
}
.city-search-results {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}
.city-result-button {
  width: 100%;
  min-height: 68px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 14px;
  background: rgba(15, 27, 47, 0.88);
  color: var(--text);
  text-align: left;
  padding: 12px 14px;
  cursor: pointer;
  transition: 160ms ease;
}
.city-result-button:hover,
.city-result-button:focus {
  transform: translateY(-1px);
  border-color: rgba(103, 232, 249, 0.55);
  outline: none;
}
.city-result-button strong,
.city-result-button small {
  display: block;
}
.city-result-button small {
  margin-top: 4px;
  color: var(--muted);
  line-height: 1.35;
}
.selected-city-note {
  min-height: 20px;
  color: var(--muted);
  font-size: 0.88rem;
}
.source-pill {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  padding: 4px 8px;
  color: var(--muted);
  font-size: 0.78rem;
  white-space: normal;
}
.source-pill.source-original {
  color: var(--accent);
}
.table-wrap {
  overflow: auto;
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 18px;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
}
.data-table th,
.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
  text-align: left;
}
.data-table th {
  position: sticky;
  top: 0;
  background: rgba(10, 18, 32, 0.96);
  color: var(--muted);
}
.reference-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.reference-links a {
  color: var(--accent);
  text-decoration: none;
}
.reference-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.55;
}
.reference-card details summary {
  cursor: pointer;
  color: var(--accent);
  margin-top: 12px;
}
.reference-card details div {
  margin-top: 10px;
  max-height: 220px;
  overflow: auto;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.empty-state {
  color: var(--muted);
  padding: 20px 0;
}

@media (max-width: 1120px) {
  .layout-grid,
  .hero,
  .charts-grid { grid-template-columns: 1fr; }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .page-shell { width: min(100vw - 20px, 1480px); padding-top: 16px; }
  .form-grid,
  .equipment-grid,
  .metric-grid,
  .references-grid,
  .region-grid,
  .actions-row { grid-template-columns: 1fr; display: grid; }
  .actions-group { flex-wrap: wrap; }
  .hero { padding: 20px; }
  .panel { padding: 18px; }
}