:root {
  color-scheme: light;
  --bg: #f9fafb;
  --panel: #ffffff;
  --panel-soft: #f7fafc;
  --ink: #0a0a0a;
  --muted: #4a5565;
  --line: #e5e7eb;
  --green: #3aab3b;
  --blue: #1d6ab2;
  --red: #e40014;
  --green-soft: #eef9ef;
  --blue-soft: #eef6ff;
  --red-soft: #fef2f2;
  --shadow: 0 12px 28px rgba(16, 24, 40, 0.08);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(249, 250, 251, 0.96)),
    var(--bg);
  color: var(--ink);
}

button,
input {
  font: inherit;
}

.app-header,
.workspace,
.method-panel {
  width: min(1500px, calc(100% - 32px));
  margin: 0 auto;
}

.app-header {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: end;
  padding: 30px 0 20px;
}

.eyebrow,
.panel-kicker {
  margin: 0 0 6px;
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 8px;
  font-size: clamp(2rem, 4vw, 4.2rem);
  line-height: 0.98;
  letter-spacing: 0;
  color: var(--blue);
}

h2 {
  margin-bottom: 0;
  font-size: 1.05rem;
}

h3 {
  margin-bottom: 8px;
  font-size: 0.96rem;
}

.lede {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.route-badge {
  display: grid;
  min-width: 156px;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
  text-align: right;
}

.route-badge strong {
  color: var(--green);
  font-size: 1.4rem;
}

.route-badge span {
  color: var(--muted);
}

.workspace {
  display: grid;
  grid-template-columns: 420px minmax(440px, 1fr) 340px;
  gap: 16px;
  align-items: start;
}

.tool-panel,
.method-panel {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.tool-panel {
  min-height: 280px;
  padding: 18px;
}

.panel-title {
  margin-bottom: 16px;
}

.row-title {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 4px;
  margin: 0 0 18px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

.segmented legend {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.segmented button,
.plain-button {
  min-height: 38px;
  border: 0;
  border-radius: 6px;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  line-height: 1.15;
}

.segmented button.is-active {
  background: var(--panel);
  box-shadow: inset 0 0 0 1px rgba(29, 106, 178, 0.28);
  color: var(--blue);
  font-weight: 800;
}

.vehicle-picker {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 0 0 12px;
  padding: 0;
  border: 0;
}

.vehicle-picker legend {
  grid-column: 1 / -1;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.vehicle-picker button {
  position: relative;
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 6px;
  min-width: 0;
  min-height: 0;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease,
    transform 140ms ease;
}

.vehicle-picker button:hover {
  border-color: rgba(29, 106, 178, 0.35);
  box-shadow: 0 8px 22px rgba(29, 106, 178, 0.08);
  transform: translateY(-1px);
}

.vehicle-picker button img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  height: auto;
  border-radius: 6px;
  background: var(--panel-soft);
  object-fit: contain;
}

.vehicle-picker > button > strong {
  align-self: end;
  min-width: 0;
  font-size: 0.86rem;
  line-height: 1.08;
}

.vehicle-picker .vehicle-type {
  color: var(--muted);
  font-size: 0.78rem;
}

.vehicle-picker button.is-active {
  border-color: rgba(58, 171, 59, 0.65);
  background: var(--green-soft);
  box-shadow: inset 0 -4px 0 var(--green);
}

.vehicle-tooltip {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  z-index: 20;
  display: grid;
  width: max-content;
  min-width: 210px;
  max-width: 270px;
  gap: 7px;
  padding: 10px;
  border: 1px solid rgba(29, 106, 178, 0.2);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 16px 36px rgba(16, 24, 40, 0.12);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -2px);
  transition:
    opacity 140ms ease,
    transform 140ms ease,
    visibility 140ms ease;
  visibility: hidden;
}

.vehicle-picker button:first-of-type .vehicle-tooltip {
  left: 0;
  transform: translateY(-2px);
}

.vehicle-picker button:last-of-type .vehicle-tooltip {
  right: 0;
  left: auto;
  transform: translateY(-2px);
}

.vehicle-picker button:hover .vehicle-tooltip,
.vehicle-picker button:focus-visible .vehicle-tooltip {
  opacity: 1;
  transform: translate(-50%, 0);
  visibility: visible;
}

.vehicle-picker button:first-of-type:hover .vehicle-tooltip,
.vehicle-picker button:first-of-type:focus-visible .vehicle-tooltip,
.vehicle-picker button:last-of-type:hover .vehicle-tooltip,
.vehicle-picker button:last-of-type:focus-visible .vehicle-tooltip {
  transform: translateY(0);
}

.vehicle-tooltip span {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.25;
}

.vehicle-tooltip em {
  font-style: normal;
}

.vehicle-tooltip strong {
  color: var(--ink);
  font-size: 0.76rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.vehicle-tooltip .is-source {
  display: grid;
  gap: 3px;
}

.vehicle-tooltip .is-source strong {
  text-align: left;
  overflow-wrap: anywhere;
}

.plain-button {
  padding: 0 12px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.control-grid {
  display: grid;
  gap: 15px;
}

.control {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 14px;
  color: var(--muted);
  font-size: 0.88rem;
}

.control output {
  min-width: 82px;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.control input {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--green);
}

.control-checkbox {
  grid-template-columns: 1fr auto;
}

.control-checkbox input[type="checkbox"] {
  grid-column: auto;
  width: auto;
  justify-self: end;
  accent-color: var(--green);
}

.control-b span,
.control-b output {
  color: var(--blue);
}

.control-b input {
  accent-color: var(--blue);
}

.advanced-controls {
  display: grid;
  gap: 12px;
}

.advanced-controls summary {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 800;
}

.advanced-controls summary::-webkit-details-marker {
  display: none;
}

.advanced-controls summary::before {
  content: "+";
  margin-right: 7px;
  color: var(--green);
  font-weight: 900;
}

.advanced-controls[open] summary::before {
  content: "-";
}

.advanced-controls[open] summary {
  color: var(--green);
}

.advanced-control-grid {
  display: grid;
  gap: 15px;
}

.visual-panel {
  min-width: 0;
}

canvas {
  display: block;
  width: 100%;
  height: clamp(330px, 42vw, 520px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.map-block {
  margin-top: 12px;
}

.map-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 0.82rem;
}

.map-title span {
  color: var(--ink);
  font-weight: 800;
}

.map-view {
  position: relative;
  overflow: hidden;
  height: clamp(320px, 30vw, 420px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eaf2f8;
  isolation: isolate;
}

.map-view img,
.map-view svg {
  position: absolute;
}

.map-view img {
  width: 256px;
  height: 256px;
  max-width: none;
  user-select: none;
}

.map-view svg {
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.map-attribution {
  position: absolute;
  right: 6px;
  bottom: 6px;
  z-index: 3;
  padding: 3px 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.92);
  color: #43504a;
  font-size: 0.72rem;
}

.map-attribution a {
  color: var(--blue);
}

.map-speed-legend {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  max-width: calc(100% - 16px);
  padding: 5px;
  border: 1px solid rgba(16, 24, 40, 0.1);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.94);
  color: #43504a;
  font-size: 0.72rem;
  font-weight: 800;
}

.map-speed-legend span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.map-speed-legend i {
  width: 14px;
  height: 5px;
  border-radius: 99px;
}

.map-loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.85rem;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  gap: 10px;
  color: var(--muted);
  font-size: 0.82rem;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.swatch {
  width: 14px;
  height: 4px;
  border-radius: 99px;
  display: inline-block;
}

.swatch-a {
  background: var(--green);
}

.swatch-b {
  background: var(--blue);
}

.swatch-limit {
  background: repeating-linear-gradient(
    90deg,
    #6a7282 0,
    #6a7282 5px,
    transparent 5px,
    transparent 8px
  );
  border: 1px solid rgba(106, 114, 130, 0.5);
}

.swatch-brake {
  background: var(--red);
}

.route-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(112px, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.fact {
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

.fact strong {
  display: block;
  font-size: 1rem;
}

.fact span {
  color: var(--muted);
  font-size: 0.76rem;
}

.metric-stack {
  display: grid;
  gap: 14px;
}

.metric {
  position: relative;
  z-index: 0;
  display: grid;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease,
    transform 140ms ease;
}

.metric:hover,
.metric:focus-visible,
.metric:focus-within {
  z-index: 40;
  border-color: rgba(29, 106, 178, 0.24);
  box-shadow: 0 10px 24px rgba(29, 106, 178, 0.08);
  transform: translateY(-1px);
}

.metric:focus-visible {
  outline: 2px solid rgba(36, 111, 158, 0.45);
  outline-offset: 2px;
}

.metric-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  color: var(--muted);
  font-size: 0.82rem;
}

.metric-head > span:first-child {
  display: grid;
  gap: 2px;
}

.metric-head small {
  color: var(--green);
  font-size: 0.66rem;
  font-weight: 800;
  line-height: 1.15;
}

.metric-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.metric-values strong {
  display: block;
  font-size: 1.18rem;
  font-variant-numeric: tabular-nums;
}

.metric-values span {
  color: var(--muted);
  font-size: 0.74rem;
}

.metric-tooltip {
  position: absolute;
  right: 10px;
  top: calc(100% + 8px);
  left: 10px;
  z-index: 30;
  display: grid;
  gap: 8px;
  padding: 10px;
  border: 1px solid rgba(29, 106, 178, 0.2);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 16px 36px rgba(16, 24, 40, 0.12);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition:
    opacity 140ms ease,
    transform 140ms ease,
    visibility 140ms ease;
  visibility: hidden;
}

.metric:hover .metric-tooltip,
.metric:focus-visible .metric-tooltip,
.metric:focus-within .metric-tooltip {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}

.metric-tooltip > strong {
  color: var(--ink);
  font-size: 0.78rem;
}

.metric-tooltip p {
  margin: 0;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.35;
}

.metric-tooltip div {
  display: grid;
  gap: 5px;
}

.metric-tooltip span {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
}

.metric-tooltip b {
  color: var(--green);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.metric-tooltip small {
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.25;
}

.delta {
  padding: 3px 8px;
  border-radius: 99px;
  background: var(--green-soft);
  color: var(--green);
  font-weight: 800;
  line-height: 1.2;
  white-space: nowrap;
}

.metric-compact .delta {
  min-height: 0;
  padding: 2px 8px;
  font-size: 0.78rem;
  line-height: 1.1;
}

.delta.is-worse {
  background: var(--red-soft);
  color: var(--red);
}

.breakdown {
  display: grid;
  gap: 18px;
  margin-top: 16px;
}

.breakdown-section {
  display: grid;
  gap: 10px;
}

.advanced-breakdown {
  display: grid;
  gap: 12px;
  padding-top: 2px;
}

.advanced-breakdown summary {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 800;
}

.advanced-breakdown summary::-webkit-details-marker {
  display: none;
}

.advanced-breakdown summary::before {
  content: "+";
  margin-right: 7px;
  color: var(--green);
  font-weight: 900;
}

.advanced-breakdown[open] summary::before {
  content: "-";
}

.advanced-breakdown[open] summary {
  margin-bottom: 12px;
  color: var(--green);
}

.advanced-breakdown .breakdown-section + .breakdown-section {
  margin-top: 16px;
}

.breakdown-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.breakdown-title small {
  font-size: 0.76rem;
  font-weight: 800;
}

.vertical-chart {
  display: grid;
  min-height: 180px;
  padding: 8px 4px 0;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(#e5e7eb 1px, transparent 1px) 0 23px / 100% 44px,
    linear-gradient(180deg, rgba(255, 255, 255, 0.25), rgba(249, 250, 251, 0.65));
}

.energy-chart {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.pm-chart {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.bar-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: 1fr auto;
  gap: 0 5px;
  min-width: 0;
}

.bar-pair > strong {
  grid-column: 1 / -1;
  margin-top: 7px;
  color: var(--muted);
  font-size: 0.74rem;
  text-align: center;
}

.vertical-bar {
  display: grid;
  grid-template-rows: auto 1fr auto;
  justify-items: center;
  min-width: 0;
  min-height: 158px;
  gap: 6px;
}

.vertical-bar span {
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.pm-chart .vertical-bar span {
  font-size: 0.7rem;
}

.vertical-track {
  display: flex;
  align-items: end;
  width: min(34px, 80%);
  min-height: 104px;
  border-radius: 6px 6px 0 0;
  background: rgba(229, 231, 235, 0.78);
  overflow: hidden;
}

.vertical-fill {
  width: 100%;
  min-height: 3px;
  border-radius: 6px 6px 0 0;
  background: var(--green);
}

.scenario-b .vertical-fill {
  background: var(--blue);
}

.vertical-bar em {
  color: var(--muted);
  font-size: 0.68rem;
  font-style: normal;
  line-height: 1.1;
  text-align: center;
}

.method-panel {
  margin-top: 16px;
  margin-bottom: 28px;
  padding: 20px;
}

.method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.method-grid article {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

.method-grid p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.source-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.8fr);
  gap: 16px;
}

.source-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.source-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 700px;
  background: #ffffff;
  font-size: 0.86rem;
}

.source-table th,
.source-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.source-table th {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.source-table tr:last-child td {
  border-bottom: 0;
}

.source-chip {
  display: inline-flex;
  align-items: center;
  margin: 0 4px 4px 0;
  padding: 2px 7px;
  border-radius: 99px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 0.74rem;
  font-weight: 800;
  white-space: nowrap;
}

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

.source-card {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.source-card strong {
  display: block;
  margin-bottom: 5px;
}

.source-card a {
  color: var(--blue);
  overflow-wrap: anywhere;
}

.source-card p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

@media (max-width: 1180px) {
  .workspace {
    grid-template-columns: 380px minmax(0, 1fr);
  }

  .result-panel {
    grid-column: 1 / -1;
  }

  .metric-stack {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .app-header {
    display: grid;
    align-items: start;
  }

  .route-badge {
    text-align: left;
  }

  .workspace,
  .source-layout,
  .method-grid {
    grid-template-columns: 1fr;
  }

  .vehicle-picker {
    grid-template-columns: repeat(3, minmax(110px, 1fr));
  }

  .metric-stack,
  .route-facts {
    grid-template-columns: 1fr 1fr;
  }

  .tool-panel,
  .method-panel {
    padding: 14px;
  }
}

@media (max-width: 540px) {
  .app-header,
  .workspace,
  .method-panel {
    width: min(100% - 20px, 1500px);
  }

  .metric-stack,
  .route-facts {
    grid-template-columns: 1fr;
  }

  .row-title {
    display: grid;
  }

  .legend {
    justify-content: start;
  }

  .vehicle-picker {
    grid-template-columns: repeat(3, minmax(104px, 1fr));
    overflow-x: auto;
    padding-bottom: 2px;
  }
}