@font-face {
  font-family: 'Instrument Sans';
  src: url('/assets/instrument-sans-latin.woff2') format('woff2');
  font-weight: 400 700;
  font-display: swap;
}

@font-face {
  font-family: 'Instrument Serif';
  src: url('/assets/instrument-serif-latin.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
}

:root {
  --paper: #f9f5ed;
  --surface: #fffdf8;
  --forest: #12372d;
  --forest-strong: #0b2a22;
  --ink: #242b25;
  --muted: #4d594e;
  --copper: #874628;
  --line: #b9a38b;
  --line-light: #d9cab7;
  --sage: #e6e9d9;
  --sage-deep: #dce1cd;
  --serif: 'Instrument Serif', Georgia, serif;
  --sans: 'Instrument Sans', system-ui, sans-serif;
  --radius: .7rem;
  --bs-body-font-family: var(--sans);
  --bs-body-color: var(--ink);
  --bs-body-bg: var(--paper);
  --bs-link-color: var(--forest);
  --bs-link-color-rgb: 18, 55, 45;
  --bs-link-hover-color-rgb: 135, 70, 40;
  --bs-secondary-color: var(--muted);
  scroll-behavior: auto;
}

body {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  font-size: 1rem;
  line-height: 1.55;
}

main { flex: 1; }
[id] { scroll-margin-block-start: 1.25rem; }

h1, h2, h3, legend {
  color: var(--forest);
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.04;
}

h1 { margin: 0; font-size: clamp(3rem, 6.5vw, 6rem); letter-spacing: -.026em; }
h2 { margin: 0; font-size: clamp(2.1rem, 3.9vw, 3.6rem); letter-spacing: -.014em; }
h3 { margin: 0; font-size: clamp(1.65rem, 2.4vw, 2.12rem); }
p:last-child, ul:last-child { margin-bottom: 0; }
a { text-underline-offset: .2em; text-decoration-thickness: .075em; }
:focus-visible { outline: 3px solid var(--copper); outline-offset: 4px; }

.site-width { width: min(100% - 6vw, 84rem); margin-inline: auto; }

.skip-link {
  position: fixed;
  z-index: 10;
  inset: .5rem auto auto .5rem;
  padding: .7rem 1rem;
  border-radius: var(--radius);
  background: var(--forest);
  color: white;
}

.skip-link:hover { color: white; }

.site-header { border-bottom: 1px solid var(--line); }

.header-inner {
  min-height: 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem 2rem;
  padding-block: .85rem;
}

.wordmark {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: .7rem;
  color: var(--forest);
  font: 400 1.82rem/.93 var(--serif);
  text-decoration: none;
  white-space: nowrap;
}

.wordmark small {
  display: block;
  margin-top: .3rem;
  color: var(--copper);
  font: 650 .68rem/1.05 var(--sans);
  letter-spacing: .14em;
  text-transform: uppercase;
}

.site-icon {
  display: inline-block;
  flex: none;
  width: 1em;
  height: 1em;
  background: currentColor;
  mask: var(--icon) center / contain no-repeat;
}

.icon-book { --icon: url('/assets/icons/book.svg'); }
.icon-sliders { --icon: url('/assets/icons/sliders.svg'); }
.icon-layers { --icon: url('/assets/icons/layers.svg'); }
.icon-withdraw { --icon: url('/assets/icons/box-arrow-right.svg'); }
.icon-journal { --icon: url('/assets/icons/journal-check.svg'); }
.icon-arrow { --icon: url('/assets/icons/arrow-right.svg'); }
.wordmark .site-icon { font-size: 1.95rem; color: var(--copper); }

.site-nav, .footer-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem clamp(.85rem, 3.4vw, 2.8rem);
  font-weight: 600;
}

.site-nav a:not(.btn) {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  color: var(--forest);
  text-decoration: none;
}

.site-nav a:not(.btn):hover, .site-nav [aria-current="page"]:not(.btn) { text-decoration: underline; }

.btn-primary {
  --bs-btn-color: #fffdf6;
  --bs-btn-bg: var(--forest);
  --bs-btn-border-color: var(--forest);
  --bs-btn-hover-color: #fffdf6;
  --bs-btn-hover-bg: var(--forest-strong);
  --bs-btn-hover-border-color: var(--forest-strong);
  --bs-btn-active-color: #fffdf6;
  --bs-btn-active-bg: var(--forest-strong);
  --bs-btn-active-border-color: var(--forest-strong);
  --bs-btn-disabled-color: #fffdf6;
  --bs-btn-disabled-bg: var(--forest);
  --bs-btn-disabled-border-color: var(--forest);
  --bs-btn-font-weight: 650;
  --bs-btn-border-radius: .5rem;
  --bs-btn-padding-x: 1.13rem;
  --bs-btn-padding-y: .65rem;
}

.btn:focus-visible, .form-control:focus-visible, .form-select:focus-visible {
  box-shadow: none;
  outline: 3px solid var(--copper);
  outline-offset: 3px;
}

.text-link { color: var(--copper); font-weight: 650; }
.text-link:hover { color: var(--forest-strong); }
.intro { color: var(--ink); font-size: clamp(1.1rem, 1.8vw, 1.35rem); line-height: 1.45; }

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(1.65rem, 4vw, 4.2rem);
  padding-block: clamp(2.3rem, 4vw, 3.65rem) clamp(1.85rem, 3vw, 2.6rem);
}

.hero h1 { font-size: clamp(3.25rem, 7.55vw, 7.2rem); line-height: .94; }
.hero .intro { margin-block: 1.55rem 1.75rem; max-width: 43ch; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .8rem 1.5rem;
}

.hero-photo {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 4;
  object-fit: cover;
  border-radius: clamp(.7rem, 1.5vw, 1.35rem);
  background: #b49a79;
}

.market-note {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 1.15rem;
  padding: 1rem clamp(1.05rem, 2.2vw, 1.7rem);
  background: var(--sage-deep);
  border-radius: var(--radius);
}

.market-note h2 { font-size: clamp(1.55rem, 2.4vw, 2.1rem); }
.market-note p { margin: 0; padding-left: 1.25rem; border-left: 1px solid #8b937b; }
.market-note a { color: var(--copper); }

.home-section { margin-block: clamp(2.7rem, 6vw, 5.3rem); }
.home-section > h2 { margin-bottom: 1.35rem; }

.steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 2.85vw, 2.6rem);
}

.steps li {
  position: relative;
  padding: clamp(1rem, 2vw, 1.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.steps li:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 100%;
  width: clamp(1rem, 2.85vw, 2.6rem);
  border-top: 1px solid var(--line);
}

.steps h3 { display: flex; align-items: center; gap: .65rem; margin-bottom: .75rem; }
.steps .site-icon { color: var(--copper); font-size: 1.45rem; }

.tool-callout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr) auto;
  align-items: center;
  gap: 1.5rem 2.2rem;
  padding: clamp(1.4rem, 3vw, 2.6rem);
  background: var(--sage);
  border-radius: var(--radius);
}

.tool-callout h2 { max-width: 14ch; }
.tool-callout > div { border-left: 1px solid #89967a; padding-left: 1.6rem; }
.tool-callout > .site-icon { color: var(--forest); font-size: clamp(2.5rem, 8vw, 6rem); }

.guide-list { list-style: none; padding: 0; margin: 0; border: 1px solid var(--line); border-radius: var(--radius); }
.guide-list li + li { border-top: 1px solid var(--line); }

.guide-list a {
  display: grid;
  grid-template-columns: minmax(12rem, 1.05fr) minmax(0, 1.7fr) auto;
  align-items: center;
  gap: 1rem;
  padding: 1.05rem clamp(1rem, 2.5vw, 1.8rem);
  color: var(--ink);
  text-decoration: none;
}

.guide-list a:hover { background: #f0e9dc; }
.guide-list a:hover strong { text-decoration: underline; }
.guide-list strong { color: var(--forest); font: 400 clamp(1.55rem, 2.5vw, 2.1rem)/1.02 var(--serif); }
.guide-list a > span:nth-child(2) { border-left: 1px solid var(--line); padding-left: 1.25rem; }
.guide-list .site-icon { font-size: 1.5rem; color: var(--copper); }

.site-footer { color: #f6f2e9; background: var(--forest); }

.footer-inner {
  display: grid;
  grid-template-columns: max-content 1fr max-content;
  align-items: center;
  gap: 1rem clamp(1rem, 3.5vw, 3rem);
  padding-block: 1.55rem;
}

.site-footer .wordmark, .site-footer a { color: #f6f2e9; }
.site-footer .wordmark small, .site-footer .site-icon { color: #e0bc9d; }
.site-footer a:focus-visible { outline-color: #f0c6a4; }
.footer-nav { border-left: 1px solid #778b75; padding-left: clamp(1rem, 2.5vw, 2rem); }
.footer-nav a, .footer-meta a { display: block; width: fit-content; }
.footer-meta { display: grid; gap: .35rem; font-size: .93rem; }

.inner-page { padding-block: 1.55rem clamp(3rem, 6vw, 5.5rem); }
.inner-page h1 { font-size: clamp(2.8rem, 5.35vw, 5.35rem); max-width: 24ch; }
.breadcrumb { margin-bottom: 1.4rem; font-size: .95rem; --bs-breadcrumb-divider-color: var(--copper); }
.inner-page .intro { margin-top: .75rem; max-width: 68ch; }
.article-layout { display: grid; grid-template-columns: minmax(0, 48rem) minmax(15rem, 1fr); gap: 2.5rem clamp(2rem, 6vw, 6rem); align-items: start; margin-top: 1.75rem; }
.article-layout-narrow { grid-template-columns: minmax(0, 48rem); }
.article-body { grid-column: 1; grid-row: 1; min-width: 0; }
.article-body > section { padding-block: 1.2rem 1.35rem; border-top: 1px solid var(--line); }
.article-body h2 { font-size: clamp(1.85rem, 3.3vw, 2.75rem); margin-bottom: .65rem; }

.article-toc {
  grid-column: 2;
  grid-row: 1;
  position: sticky;
  top: 1.2rem;
  padding: 1.35rem 1.45rem;
  border-radius: var(--radius);
  background: var(--sage);
}

.article-toc h2 { padding-bottom: .8rem; border-bottom: 1px solid var(--line); font-size: 2rem; }
.article-toc ul, .article-related ul, .sources-list { list-style: none; margin: .85rem 0 0; padding: 0; }
.article-toc li + li, .article-related li + li { margin-top: .55rem; }
.article-note { margin-block: 1rem; padding: 1rem 1.2rem; background: var(--sage); border-left: 3px solid var(--copper); border-radius: 0 var(--radius) var(--radius) 0; }
.article-note strong { display: block; margin-bottom: .25rem; color: var(--forest); font: 400 1.65rem/1 var(--serif); }
.article-related { margin-top: .35rem; padding: 1.25rem; border: 1px solid var(--line); border-radius: var(--radius); }
.article-related h2 { font-size: 1.85rem; }
.sources-list li { padding-block: .6rem; }
.sources-list li + li { border-top: 1px solid var(--line-light); }
.sources-list span { display: block; color: var(--muted); font-size: .96rem; }

.workbench {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(1.15rem, 2vw, 1.8rem);
  align-items: start;
  margin-top: 1.35rem;
  padding-top: 1.35rem;
  border-top: 1px solid var(--line);
}

.worksheet, .reading-sheet { padding: clamp(1.1rem, 2vw, 1.8rem); border-radius: var(--radius); }
.worksheet { background: var(--surface); border: 1px solid var(--line-light); }
.worksheet fieldset { min-width: 0; }
.scenario-controls { margin-bottom: 1.3rem; }
.form-label { display: block; margin-bottom: .3rem; font-size: .94rem; font-weight: 650; }
.form-text { font-size: .9rem; }

.form-control, .form-select {
  min-height: 2.75rem;
  border-color: #887a68;
  border-radius: .4rem;
  background-color: var(--surface);
  color: var(--ink);
}

.form-control::placeholder { color: var(--muted); }
.form-control:focus, .form-select:focus { border-color: var(--forest); background-color: #fff; }

.clause-section { border: 0; margin: 0 0 1.3rem; padding: 0; }
.clause-section legend { border-top: 1px solid var(--line); padding-top: 1rem; margin-bottom: .85rem; font-size: 2rem; }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .95rem 1rem; }
.field-full { grid-column: 1 / -1; }
.worksheet-actions { display: flex; align-items: center; flex-wrap: wrap; gap: .55rem 1rem; }
.worksheet-actions .btn-link { --bs-btn-color: var(--copper); padding-inline: 0; }
#worksheet-message { min-height: 1.35rem; margin-bottom: .45rem; }
.view-summary { display: none; }
.back-to-fields { margin-top: .8rem; }
.reading-sheet { background: var(--sage); }
.reading-sheet h2 { font-size: clamp(2.3rem, 3.5vw, 3.35rem); }
.sheet-source { margin-top: .45rem; color: var(--muted); }
.sheet-phase { padding-block: 1rem; border-top: 1px solid var(--line); }
.sheet-phase h3 { margin-bottom: .65rem; }

.sheet-phase dl {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  gap: .36rem .9rem;
  font-size: .94rem;
}

.sheet-phase dt { font-weight: 650; }
.sheet-phase dd { margin: 0; overflow-wrap: anywhere; }

.nominal {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: .35rem .7rem;
  padding: 1rem;
  background: #dce0c9;
  border-radius: .5rem;
}

.nominal h3 { font-size: 1.75rem; }
.nominal output { color: var(--forest); font-weight: 700; text-align: end; font-variant-numeric: tabular-nums; }
.nominal p { grid-column: 1 / -1; font-size: .9rem; margin: 0; }
.sheet-note { margin-top: 1rem; padding-left: .8rem; border-left: 3px solid var(--copper); }
.workbench-related { margin-top: 1.15rem; }

@media (max-width: 63.99rem) {
  .site-width { width: min(100% - 2.8rem, 84rem); }
  .hero h1 { font-size: clamp(3.35rem, 8.65vw, 6.2rem); }
  .footer-inner { grid-template-columns: max-content 1fr; }
  .footer-meta { grid-column: 2; }
  .article-layout { gap: 2.25rem; }
}

@media (max-width: 48rem) {
  .site-width { width: min(100% - 2rem, 84rem); }
  .header-inner { align-items: flex-start; flex-direction: column; gap: .5rem; }
  .site-nav { width: 100%; gap: .4rem clamp(.6rem, 2.75vw, 1rem); font-size: .94rem; }
  .site-nav .btn { --bs-btn-padding-x: .75rem; font-size: inherit; }
  .hero { grid-template-columns: 1fr; padding-top: 2.2rem; }
  .hero h1 { font-size: clamp(3.35rem, 11.6vw, 6.15rem); }
  .hero .intro { margin-block: 1.1rem 1.3rem; }
  .hero-photo { aspect-ratio: 16 / 10; }
  .market-note { grid-template-columns: 1fr; gap: .45rem; }
  .market-note p { padding: 0; border: 0; }
  .steps { grid-template-columns: 1fr; }
  .steps li:not(:last-child)::after { top: 100%; left: 1.7rem; width: 0; height: 1rem; border-top: 0; border-left: 1px solid var(--line); }
  .tool-callout { grid-template-columns: 1fr auto; gap: 1rem; }
  .tool-callout > div { grid-row: 2; grid-column: 1 / -1; padding: 0; border-left: 0; }
  .tool-callout > .site-icon { grid-column: 2; grid-row: 1; }
  .guide-list a { grid-template-columns: minmax(0, 1fr) auto; gap: .4rem 1rem; }
  .guide-list a > span:nth-child(2) { grid-row: 2; padding: 0; border: 0; }
  .guide-list .site-icon { grid-column: 2; grid-row: 1 / 3; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-nav { padding-left: 0; border: 0; }
  .footer-meta { grid-column: 1; }
  .article-layout { grid-template-columns: minmax(0, 1fr); gap: 1.25rem; }
  .article-toc { position: static; grid-column: 1; grid-row: auto; }
  .article-body { grid-row: auto; }
  .workbench { grid-template-columns: minmax(0, 1fr); }
  .view-summary { display: inline-block; }
}

@media (max-width: 32rem) {
  .field-grid { grid-template-columns: minmax(0, 1fr); gap: .75rem; }
  .hero-actions { gap: .6rem 1rem; }
  .nominal { grid-template-columns: minmax(0, 1fr); }
  .nominal output { text-align: start; }
}

@media (prefers-reduced-motion: reduce) {
  .btn { transition: none; }
}