:root {
  color-scheme: light;
  --bg: #f7f8f4;
  --panel: #ffffff;
  --ink: #17211d;
  --muted: #66736d;
  --line: #d9e0db;
  --curve-one: #1f6f8b;
  --curve-two: #b84f65;
  --cutoff: #2f3a35;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  line-height: 1.45;
}

main {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

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

h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1;
}

.lede {
  max-width: 720px;
  margin-top: 12px;
  color: var(--muted);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 20px;
  margin-top: 28px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 16px 34px rgba(23, 33, 29, 0.08);
}

.controls {
  display: grid;
  gap: 16px;
  align-content: start;
  padding: 20px;
}

.curve-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfa;
}

.curve-card h2 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
}

.swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--curve-one);
}

.curve-card:nth-of-type(2) .swatch {
  background: var(--curve-two);
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 750;
}

input {
  min-height: 44px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink);
  font: inherit;
}

input:focus {
  border-color: var(--curve-one);
  outline: 3px solid rgba(31, 111, 139, 0.16);
}

.number-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.summary {
  display: grid;
  gap: 14px;
  padding: 18px;
}

.summary h3 {
  font-size: 1rem;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.metric {
  min-height: 86px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfa;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(1.15rem, 3vw, 1.8rem);
  line-height: 1.1;
}

.chart-panel {
  display: grid;
  gap: 16px;
  padding: 20px;
}

.chart-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
}

.legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 750;
}

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

.legend span::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--curve-one);
}

.legend span:nth-child(2)::before {
  background: var(--curve-two);
}

.legend span:nth-child(3)::before {
  width: 3px;
  background: var(--cutoff);
}

canvas {
  width: 100%;
  height: 440px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

@media (max-width: 860px) {
  .workspace,
  .metrics {
    grid-template-columns: 1fr;
  }

  canvas {
    height: 340px;
  }
}