:root {
  --ink: #1a1a1a;
  --ink-soft: #444;
  --muted: #777;
  --rule: #e6e6e6;
  --bg: #ffffff;
  --bg-soft: #fafafa;
  --accent: #c4631d;
  --accent-2: #2c5f8a;
  --good: #0e7a4f;
  --warn: #b54430;
  --code-bg: #f4f1ec;
  --max: 760px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Charter', 'Georgia', 'Cambria', serif;
  font-size: 18px;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  max-width: var(--max);
  padding: 64px 28px 120px;
  margin: 0 auto;
}

header.lede {
  margin-bottom: 56px;
}

.eyebrow {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 14px;
}

h1 {
  font-family: 'Charter', 'Georgia', serif;
  font-weight: 700;
  font-size: 44px;
  line-height: 1.12;
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}

h2 {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  font-weight: 700;
  font-size: 22px;
  line-height: 1.25;
  margin: 56px 0 14px;
  color: var(--ink);
  letter-spacing: -0.005em;
}

h2 .num {
  display: inline-block;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin-right: 12px;
  letter-spacing: 0.06em;
}

h3 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 17px;
  margin: 28px 0 8px;
  color: var(--ink);
}

p {
  margin: 0 0 18px;
  color: var(--ink);
}

p.dek {
  font-size: 21px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: 26px;
  font-style: italic;
}

p.source-link {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  font-size: 13px;
  margin: -8px 0 18px;
}

.choice-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 22px 0 14px;
}

.choice-card {
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 14px 18px 16px;
  background: var(--bg-soft);
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
}

.choice-card .card-head {
  border-bottom: 1px solid var(--rule);
  padding-bottom: 10px;
  margin-bottom: 12px;
}

.choice-card .card-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-right: 10px;
}

.choice-card .card-head strong {
  font-size: 15px;
  color: var(--ink);
}

.choice-card dl.card-attrs {
  margin: 0;
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 14px;
  row-gap: 5px;
  font-size: 13.5px;
}

.choice-card dt {
  color: var(--muted);
  font-weight: 500;
}

.choice-card dd {
  margin: 0;
  color: var(--ink);
}

.choice-card dt.price-row,
.choice-card dd.price-row {
  margin-top: 6px;
  padding-top: 8px;
  border-top: 1px solid var(--rule);
  font-weight: 600;
  font-size: 14.5px;
  color: var(--ink);
}

p.card-caption {
  font-size: 16px;
  color: var(--ink-soft);
  margin-top: 14px;
  margin-bottom: 26px;
}

@media (max-width: 720px) {
  .choice-cards { grid-template-columns: 1fr; }
}

ul, ol { padding-left: 24px; margin: 0 0 18px; }
li { margin-bottom: 6px; }

a {
  color: var(--accent-2);
  text-decoration: none;
  border-bottom: 1px solid rgba(44, 95, 138, 0.3);
}
a:hover { border-bottom-color: var(--accent-2); }

code, .mono {
  font-family: 'JetBrains Mono', 'Menlo', 'Consolas', monospace;
  font-size: 14.5px;
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 3px;
}

figure {
  margin: 28px 0 36px;
  /* allow figures to escape the prose column slightly */
  margin-left: -40px;
  margin-right: -40px;
}

figure img {
  width: 100%;
  display: block;
  border: 1px solid var(--rule);
  border-radius: 4px;
}

figcaption {
  margin-top: 10px;
  font-family: 'Inter', sans-serif;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--muted);
  padding: 0 8px;
}

.callout {
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  padding: 18px 22px;
  margin: 26px 0;
  border-radius: 0 4px 4px 0;
  font-size: 17px;
}
.callout strong { color: var(--ink); }

.note {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  color: var(--muted);
  border-top: 1px solid var(--rule);
  padding-top: 12px;
  margin-top: 28px;
}

table.compact {
  font-family: 'Inter', sans-serif;
  font-size: 14.5px;
  border-collapse: collapse;
  width: 100%;
  margin: 14px 0 28px;
}
table.compact th, table.compact td {
  text-align: left;
  padding: 7px 12px 7px 0;
  border-bottom: 1px solid var(--rule);
}
table.compact th {
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  border-bottom: 1.5px solid var(--ink);
}
table.compact td.num, table.compact th.num { text-align: right; }
table.compact .locked { color: var(--warn); }
table.compact .engaged { color: var(--good); }

hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 56px 0;
}

footer {
  font-family: 'Inter', sans-serif;
  font-size: 13.5px;
  color: var(--muted);
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
}

/* ── References ──────────────────────────────────────────────────────────── */

ol.references {
  list-style: decimal;
  padding-left: 28px;
  margin: 14px 0 24px;
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.55;
}

ol.references li {
  margin-bottom: 18px;
  padding-left: 4px;
}

ol.references cite {
  font-style: normal;
  color: var(--ink);
}

ol.references .ref-note {
  margin-top: 4px;
  font-size: 14px;
  color: var(--muted);
  font-style: italic;
}

/* ── Appendix ───────────────────────────────────────────────────────────── */

hr.appendix-divider {
  border: none;
  border-top: 2px solid var(--ink);
  margin: 80px 0 0;
  position: relative;
}

.appendix {
  margin-top: 48px;
  font-size: 16.5px;
  color: var(--ink-soft);
}

.appendix h2.appendix-title {
  font-family: 'Charter', 'Georgia', serif;
  font-weight: 700;
  font-size: 30px;
  margin: 6px 0 12px;
  color: var(--ink);
  letter-spacing: -0.005em;
}

.appendix p.appendix-dek {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  font-size: 16px;
  font-style: italic;
  color: var(--muted);
  margin-bottom: 36px;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 18px;
}

.appendix h3 {
  margin-top: 32px;
}

.appendix p, .appendix li {
  color: var(--ink-soft);
}

.appendix strong { color: var(--ink); }

pre.code-block {
  font-family: 'JetBrains Mono', 'Menlo', 'Consolas', monospace;
  font-size: 13.5px;
  line-height: 1.55;
  background: var(--code-bg);
  color: var(--ink);
  padding: 14px 18px;
  border-radius: 4px;
  overflow-x: auto;
  margin: 14px 0 22px;
  white-space: pre;
}

.callout.prompt-block {
  padding: 16px 20px;
}
.callout.prompt-block pre {
  font-family: 'JetBrains Mono', 'Menlo', 'Consolas', monospace;
  font-size: 13px;
  line-height: 1.55;
  margin: 0;
  white-space: pre-wrap;
  color: var(--ink);
  background: transparent;
}

@media (max-width: 760px) {
  main { padding: 36px 18px 80px; }
  h1 { font-size: 34px; }
  p.dek { font-size: 18px; }
  figure { margin-left: -8px; margin-right: -8px; }
  .appendix h2.appendix-title { font-size: 24px; }
  pre.code-block { font-size: 12.5px; }
}