:root {
  --bg: #f3efe6;
  --ink: #1c1915;
  --muted: #6f675e;
  --line: #ddd4c6;
  --card: #fbf8f2;
  --accent: #1f6b4a;
  --rust: #8c4a2f;
  --bad: #8a2e24;
  color-scheme: light;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.45;
}

.page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 28px 20px 64px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2, h3 {
  font-family: "Iowan Old Style", Palatino, Georgia, serif;
  font-weight: 500;
  letter-spacing: -0.02em;
}

h1 { font-size: 40px; margin: 0 0 8px; }
h2 { font-size: 26px; margin: 0 0 8px; }
h3 { font-size: 18px; margin: 0 0 8px; }

.lede { max-width: 62ch; margin: 0; color: var(--muted); }

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.tabs button { border-radius: 999px; padding: 8px 14px; }
.tabs button[aria-selected="true"] {
  background: var(--ink);
  color: #f7f3eb;
  border-color: var(--ink);
}

.mixes { display: grid; gap: 8px; }
.mixes button { text-align: left; padding: 10px 12px; }
.mixes button.on { background: #efe7d4; border-color: var(--ink); }
.mixes small { display: block; color: var(--muted); font-size: 12px; }

.quote { margin: 4px 0 0; min-height: 1.2em; font-size: 13px; color: var(--muted); }
.quote.bad { color: var(--bad); }

details.more { margin: 8px 0 14px; }
details.more summary { cursor: pointer; }
.custom-mix { margin-top: 12px; }

.layout {
  display: grid;
  grid-template-columns: minmax(300px, 420px) minmax(0, 1fr);
  gap: 28px;
  margin-top: 28px;
  align-items: start;
}

.controls {
  position: sticky;
  top: 12px;
  max-height: calc(100vh - 24px);
  overflow: auto;
  padding-right: 8px;
}

.block { margin: 0 0 18px; padding: 0 0 16px; border-bottom: 1px solid var(--line); }
.block h2 { font-size: 18px; }

.help, .sum, .caption, .note { color: var(--muted); font-size: 13px; }
.help { margin: 0 0 10px; }
.sum { margin: 6px 0 0; }
.sum.bad { color: var(--bad); }

label { display: block; font-size: 13px; color: var(--muted); }
.row { display: flex; gap: 8px; align-items: end; }
.row label { flex: 1; }
.grow { flex: 1; }

input, select, button { font: inherit; color: inherit; }
input, select {
  width: 100%;
  margin-top: 4px;
  padding: 7px 8px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 4px;
}

.sleeve {
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.period {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  margin: 0 0 10px;
}

.period.lump { background: #f7f1e4; }

.period-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.period-title { margin: 0; font-weight: 600; color: var(--ink); }

.toggle {
  display: flex;
  margin: 10px 0;
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}

.toggle button {
  flex: 1;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.toggle button.on { background: var(--ink); color: #f7f3eb; }

.split-row {
  display: grid;
  grid-template-columns: minmax(64px, 88px) 1fr auto;
  gap: 8px;
  align-items: center;
  margin-top: 6px;
}

.split-row input { margin-top: 0; }
.split-name { color: var(--ink); font-size: 13px; }
.split-unit { color: var(--muted); font-size: 12px; }

.check { display: flex; gap: 8px; align-items: center; margin: 8px 0; color: var(--ink); }
.check input { width: auto; margin: 0; }

.actions, .buttons { display: flex; flex-wrap: wrap; gap: 8px; }

button {
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 4px;
  padding: 7px 10px;
  cursor: pointer;
}

button.primary { background: var(--ink); color: #f7f3eb; border-color: var(--ink); }
button.ghost { color: var(--muted); }
button:disabled { opacity: 0.55; cursor: progress; }

.results { min-width: 0; }

.placeholder, .panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px 16px;
  margin: 14px 0;
}

.stat { margin: 0; }
.stat b {
  display: block;
  font-size: 22px;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.stat span { color: var(--muted); font-size: 12px; }
.stat.down b { color: var(--rust); }
.stat.up b { color: var(--accent); }

.chart-host { position: relative; min-height: 300px; }
.chart-host svg { width: 100%; height: auto; display: block; }
.tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--ink);
  color: #f7f3eb;
  padding: 8px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  max-width: 240px;
}

.legend { display: flex; flex-wrap: wrap; gap: 10px 14px; margin: 8px 0 0; padding: 0; list-style: none; }
.legend li { display: flex; gap: 6px; align-items: center; font-size: 13px; }
.swatch { width: 14px; height: 3px; display: inline-block; }

.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; font-size: 13px; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; white-space: nowrap; }
th { color: var(--muted); font-weight: 500; }
.num { text-align: right; }

.banner {
  margin: 0 0 12px;
  padding: 8px 10px;
  background: #efe7d4;
  border-radius: 4px;
  font-size: 13px;
}
.error {
  margin: 0 0 12px;
  padding: 8px 10px;
  background: #f6e4df;
  color: var(--bad);
  border-radius: 4px;
}
.notes { margin: 8px 0 0; padding-left: 18px; }
.notes li { margin: 4px 0; }

.forward { margin-top: 22px; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .controls { position: static; max-height: none; padding-right: 0; }
  h1 { font-size: 32px; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}