:root {
  --ink: #172334;
  --muted: #64748b;
  --line: #d8e0e9;
  --blue: #2d7bc8;
  --orange: #f0642b;
  --cyan: #1595d3;
  --cyan-soft: #edf8fc;
  --paper: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Instrument Sans", "Avenir Next", sans-serif;
  line-height: 1.5;
}

a {
  color: var(--blue);
  text-underline-offset: 3px;
}

.page-header,
main,
footer {
  width: min(1600px, calc(100% - 64px));
  margin-inline: auto;
}

.page-header {
  padding: 34px 0 28px;
  border-bottom: 1px solid var(--line);
}

.crumbs {
  display: flex;
  gap: 9px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 0.86rem;
}

.crumbs a {
  color: inherit;
}

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

h1 {
  margin-bottom: 8px;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

h2,
h3 {
  letter-spacing: -0.02em;
}

.lede {
  max-width: 900px;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 1.04rem;
}

.source-line {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

main {
  padding: 30px 0 72px;
}

.controls-section {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 34px;
  align-items: center;
  margin-bottom: 22px;
}

.controls-section h2,
.milestones h2,
.method h2 {
  margin-bottom: 5px;
  font-size: 1.3rem;
}

.controls-section > div:first-child p,
.method > div:first-child p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr)) auto;
  gap: 24px;
  align-items: end;
  padding: 18px 20px;
  border: 1px solid var(--line);
  background: #fbfdfe;
}

.range-control {
  display: grid;
  gap: 8px;
  color: #42566a;
  font-size: 0.86rem;
  font-weight: 600;
}

.range-control > span {
  display: flex;
  justify-content: space-between;
}

output {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--orange);
}

.ticket-toggle {
  display: flex;
  gap: 8px;
  align-items: center;
  min-height: 38px;
  color: #42566a;
  font-size: 0.86rem;
  font-weight: 600;
  white-space: nowrap;
}

.ticket-toggle input {
  width: 17px;
  height: 17px;
  margin: 0;
  accent-color: var(--orange);
}

.ticket-toggle span {
  display: none;
}

.summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 30px;
  border-block: 1px solid var(--line);
}

.summary > div {
  padding: 17px 22px;
}

.summary > div + div {
  border-left: 1px solid var(--line);
}

.summary-label,
.summary small {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
}

.summary strong {
  display: block;
  margin: 3px 0 1px;
  font-size: 1.45rem;
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
}

.chart-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 58px 72px;
}

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

.chart-heading {
  min-height: 112px;
}

.chart-heading > span {
  display: block;
  margin-bottom: 6px;
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.chart-heading h2 {
  margin-bottom: 7px;
  font-size: clamp(1.35rem, 2.2vw, 1.9rem);
  line-height: 1.15;
}

.chart-heading p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.chart {
  width: 100%;
  min-height: 315px;
}

.chart svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.chart .grid-line {
  stroke: var(--line);
  stroke-width: 1;
}

.chart .axis-line {
  stroke: #8998a6;
  stroke-width: 1.2;
}

.chart .tick-label,
.chart .axis-label,
.chart .series-label,
.chart .value-label {
  fill: var(--muted);
  font-family: "Instrument Sans", sans-serif;
}

.chart .tick-label {
  font-size: 13px;
}

.chart .axis-label {
  font-size: 14px;
  font-weight: 600;
}

.chart .series-label,
.chart .value-label {
  font-size: 13px;
  font-weight: 600;
}

.chart .current-line,
.chart .new-line {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 3.5;
}

.chart .current-line {
  stroke: var(--blue);
}

.chart .new-line {
  stroke: var(--orange);
}

.chart .current-mark,
.chart .loss-bar {
  fill: var(--blue);
}

.chart .new-mark,
.chart .saving-bar {
  fill: var(--orange);
}

.chart .selected-budget {
  stroke: var(--cyan);
  stroke-width: 1.5;
  stroke-dasharray: 5 5;
}

.chart .selected-dot {
  stroke: white;
  stroke-width: 2;
}

.chart-readout {
  min-height: 24px;
  margin: 4px 0 0;
  color: #42566a;
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
}

.milestones {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 42px;
  align-items: center;
  margin-top: 70px;
  padding: 28px 0;
  border-block: 1px solid var(--line);
}

.milestone-copy p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.milestone-track {
  display: grid;
  grid-template-columns: repeat(8, minmax(58px, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.milestone-track li {
  padding: 12px 8px;
  border-left: 1px solid var(--line);
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.milestone-track li:last-child {
  border-right: 1px solid var(--line);
}

.milestone-track strong,
.milestone-track span {
  display: block;
}

.milestone-track strong {
  font-size: 1rem;
}

.milestone-track span {
  color: var(--cyan);
  font-size: 0.8rem;
  font-weight: 700;
}

.method {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 42px;
  margin-top: 54px;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px 34px;
}

.method-grid h3 {
  margin-bottom: 6px;
  font-size: 1rem;
}

.method-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

code {
  color: var(--ink);
  font-size: 0.9em;
}

footer {
  display: flex;
  gap: 24px;
  justify-content: space-between;
  padding: 24px 0 38px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
}

footer p {
  margin-bottom: 0;
}

footer > a {
  flex: 0 0 auto;
}

@media (max-width: 980px) {
  .controls-section,
  .milestones,
  .method {
    grid-template-columns: 1fr;
  }

  .chart-grid {
    grid-template-columns: 1fr;
  }

  .chart-heading {
    min-height: auto;
  }
}

@media (max-width: 720px) {
  .page-header,
  main,
  footer {
    width: min(100% - 28px, 1600px);
  }

  .page-header {
    padding-top: 22px;
  }

  .controls {
    grid-template-columns: 1fr;
  }

  .ticket-toggle {
    white-space: normal;
  }

  .summary {
    grid-template-columns: 1fr;
  }

  .summary > div {
    padding-inline: 8px;
  }

  .summary > div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .chart-grid {
    gap: 42px;
  }

  .chart {
    min-height: 260px;
  }

  .milestone-track {
    grid-template-columns: repeat(4, 1fr);
  }

  .milestone-track li:nth-child(5) {
    border-left: 1px solid var(--line);
  }

  .method-grid {
    grid-template-columns: 1fr;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
  }
}