:root {
  color-scheme: light;
  --bg: #f5f7f2;
  --panel: #ffffff;
  --ink: #17211d;
  --muted: #61706a;
  --line: #d8e0d9;
  --accent: #176b57;
  --accent-2: #315f9f;
  --warn: #b64e38;
}

* {
  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(1080px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.8rem);
  line-height: 1;
}

h2 {
  font-size: 1rem;
}

.lede {
  max-width: 680px;
  margin-top: 12px;
  color: var(--muted);
}

.calculator {
  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);
}

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

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(--accent);
  outline: 3px solid rgba(23, 107, 87, 0.16);
}

.adjust-buttons {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.adjust-buttons button {
  min-height: 36px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfa;
  color: var(--ink);
  font: inherit;
  font-size: 0.86rem;
  font-weight: 800;
  cursor: pointer;
}

.adjust-buttons button:hover {
  border-color: var(--accent);
  background: rgba(23, 107, 87, 0.08);
}

.results {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.metric {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfa;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(1.25rem, 3vw, 2rem);
  line-height: 1.05;
}

.chart-panel {
  display: grid;
  gap: 18px;
  padding: 20px;
}

.chart-header {
  display: flex;
  align-items: center;
  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(--accent-2);
}

.legend span:last-child::before {
  background: var(--warn);
}

canvas {
  width: 100%;
  height: 380px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.summary-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  font-size: 0.92rem;
}

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

.summary-table th:first-child,
.summary-table td:first-child {
  text-align: left;
}

.summary-table th {
  color: var(--muted);
  font-size: 0.76rem;
  text-transform: uppercase;
}

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

@media (max-width: 820px) {
  .calculator,
  .results {
    grid-template-columns: 1fr;
  }

  canvas {
    height: 320px;
  }
}