:root {
  --bg: #f3f0e8;
  --ink: #1c1915;
  --muted: #6d665e;
  --line: #ddd4c6;
  --card: #fffdf8;
  --up: #0c7a45;
  --down: #b42318;
  --warn: #7a4e00;
  --warn-bg: #fff3d6;
  --accent: #9a3412;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.5 "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
}

main {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 64px;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 4px 0 8px;
  font-size: 40px;
  font-weight: 650;
  letter-spacing: -0.03em;
}

h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

.lede, .mode-note, .section-note, .reference, .limits p {
  color: var(--muted);
  max-width: 68ch;
}

form, .range-banner, section, .status {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
}

form { padding: 18px; margin-top: 24px; }

label { display: block; }

.address span, .fields span, legend {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
}

input[type="text"], input[type="number"], .address input {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
  color: inherit;
}

.address input { font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; }

fieldset {
  border: 0;
  margin: 16px 0 0;
  padding: 0;
}

.choices { display: flex; flex-wrap: wrap; gap: 8px; }

.choices label {
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  background: #fff;
}

.choices.stack { flex-direction: column; align-items: flex-start; }
.choices.stack label { border-radius: 8px; }

.fields {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.fields label { position: relative; }
.fields em {
  position: absolute;
  right: 12px;
  bottom: 10px;
  color: var(--muted);
  font-style: normal;
}
.fields input { padding-right: 58px; }

button[type="submit"] {
  margin-top: 16px;
  border: 0;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
  padding: 10px 16px;
  font: inherit;
  cursor: pointer;
}

button:disabled { opacity: 0.55; cursor: wait; }

.status {
  margin: 16px 0 0;
  padding: 12px 14px;
}

.status.bad { color: var(--down); }

#result { margin-top: 16px; }

.range-banner, section, .warnings {
  margin-top: 12px;
}

.range-banner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 18px;
  padding: 16px 18px;
}

.range-banner span, .summary span, .breakdown dt {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.range-banner strong, .summary strong {
  display: block;
  margin: 2px 0;
  font-size: 20px;
  font-weight: 650;
}

.range-banner .actual strong { font-variant-numeric: tabular-nums; }

.range-banner em, .summary em {
  color: var(--muted);
  font-style: normal;
  font-size: 13px;
}

.range-banner p { grid-column: 1 / -1; margin: 0; }

.warnings {
  margin: 12px 0 0;
  padding: 10px 16px 10px 32px;
  background: var(--warn-bg);
  color: var(--warn);
  border-radius: 14px;
}

.summary {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-top: 12px;
}

.summary article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
}

.summary strong { font-variant-numeric: tabular-nums; }

.up { color: var(--up); }
.down { color: var(--down); }

.ratio-line {
  margin: 12px 0 0;
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.ratio-line strong {
  display: inline-block;
  margin-right: 12px;
  font-size: 20px;
}

.ratio-line span { color: var(--muted); }

.mode-note { margin: 10px 2px; }

.breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px 18px;
  margin: 0;
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.breakdown dd { margin: 0; font-variant-numeric: tabular-nums; font-weight: 650; }
.breakdown small { color: var(--muted); }

.reference { margin: 10px 2px 0; }

section { padding: 14px 16px 16px; }

table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; font-size: 13px; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 550; }
tr.current { background: #f6efe4; }
tr.toxic { background: #fff1ee; }

.table-wrap { overflow: auto; max-height: 520px; }

.section-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.section-head label { display: flex; align-items: center; gap: 6px; color: var(--muted); }

.text-button {
  margin-top: 8px;
  border: 0;
  background: transparent;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
  padding: 0;
}

canvas { width: 100%; display: block; }

.limits p { margin: 8px 0; }

@media (max-width: 800px) {
  h1 { font-size: 32px; }
  .fields, .summary, .breakdown, .range-banner { grid-template-columns: 1fr; }
}