:root {
  --paper: #f3efe6;
  --ink: #1c1915;
  --muted: #5e584e;
  --line: #ddd4c6;
  --card: #fbf8f2;
  --copper: #9a3412;
  --ok: #1d6b43;
  --ok-bg: #e5f2ea;
  --caution: #8a4b08;
  --caution-bg: #f8ecd6;
  --outside: #9a3412;
  --outside-bg: #f8e6df;
  color: var(--ink);
  background: var(--paper);
  font-family: "Avenir Next", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
}

.wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 36px 0 64px;
}

header h1 {
  font-family: "Iowan Old Style", Palatino, "Palatino Linotype", serif;
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 8px 0 12px;
}

.kicker, .section-label {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
}

.lede {
  max-width: 68ch;
  font-size: 1.05rem;
  line-height: 1.5;
  margin: 0 0 28px;
}

.layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px;
}

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

button, .text-link {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
}

button:hover { border-color: var(--ink); }

button.primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

label {
  display: block;
  margin: 16px 0 6px;
  font-size: 0.92rem;
}

label span {
  float: right;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

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

.outputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 22px;
}

.outputs p {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.outputs strong {
  display: block;
  margin-top: 4px;
  font-family: "Iowan Old Style", Palatino, serif;
  font-size: 2.4rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
}

.outputs small {
  color: var(--muted);
}

.note {
  min-height: 1.2em;
  color: var(--muted);
  font-size: 0.92rem;
}

.status {
  display: inline-block;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status.inside { background: var(--ok-bg); color: var(--ok); }
.status.caution { background: var(--caution-bg); color: var(--caution); }
.status.outside { background: var(--outside-bg); color: var(--outside); }

#decision {
  font-family: "Iowan Old Style", Palatino, serif;
  font-size: 1.7rem;
  line-height: 1.2;
  margin: 14px 0;
}

#detail, #nearest {
  line-height: 1.5;
  color: var(--muted);
}

.rule {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.rule div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.figures {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
  margin-top: 28px;
}

figure {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
}

figure img {
  display: block;
  width: 100%;
  height: auto;
  background: white;
}

figcaption {
  padding: 14px 16px 16px;
  line-height: 1.45;
}

footer {
  margin-top: 28px;
  color: var(--muted);
}

footer a { color: var(--ink); }

.section-head {
  margin: 42px 0 8px;
}

.section-head h2 {
  font-family: "Iowan Old Style", Palatino, serif;
  font-size: 1.8rem;
  font-weight: 500;
  margin: 6px 0 0;
}

canvas.plot {
  width: 100%;
  height: 320px;
  display: block;
  background: white;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  font-size: 0.92rem;
}

th, td {
  text-align: left;
  padding: 6px 0;
  border-bottom: 1px solid var(--line);
}

th { color: var(--muted); font-weight: 500; }

select {
  font: inherit;
  width: 100%;
  margin-top: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: white;
  color: var(--ink);
}

.ref-line {
  font-family: "Iowan Old Style", Palatino, serif;
  font-size: 1.35rem;
  margin: 6px 0 14px;
}

.fuel-line {
  font-size: 1.02rem;
  line-height: 1.45;
  margin: 8px 0 4px;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

#journal {
  margin: 8px 0 12px;
  padding-left: 1.1rem;
  min-height: 1.2em;
}

#journal li { margin: 8px 0; line-height: 1.4; }
#journal .refused { color: var(--outside); }
#journal .proposed { color: var(--ok); }

.fold {
  margin-top: 28px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--card);
  padding: 8px 18px 18px;
}

.fold summary {
  cursor: pointer;
  font-family: "Iowan Old Style", Palatino, serif;
  font-size: 1.35rem;
  padding: 12px 0;
}

canvas.plot.tall { height: 380px; }

#loss-img {
  width: 100%;
  margin-top: 16px;
  border-radius: 12px;
}

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