:root {
  --paper: #fdfaf3;
  --paper-2: #f6efe1;
  --card: #ffffff;
  --ink: #17140f;
  --ink-soft: #574c3f;
  --rule: #e3d9c6;
  --rule-strong: #cdc0a6;
  --rust: #b4441f;
  --rust-wash: #fbeee8;
  --teal: #245a52;
  --marker: #f6e97d;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: Georgia, "Iowan Old Style", "Times New Roman", Times, serif;
  --shadow: 0 1px 2px rgba(23, 20, 15, 0.06), 0 10px 28px rgba(23, 20, 15, 0.05);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 200ms;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.72;
  background-image:
    linear-gradient(var(--rule) 1px, transparent 1px);
  background-size: 100% 96px;
  background-position: 0 -1px;
}

.shell { width: min(1120px, calc(100% - 3rem)); margin: 0 auto; }
@media (max-width: 640px) { .shell { width: calc(100% - 2rem); } }

h1, h2, h3 {
  font-family: var(--sans);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.14;
  margin: 0 0 0.6rem;
  text-wrap: balance;
}
h1 { font-size: clamp(2rem, 1.2rem + 3.4vw, 3.35rem); }
h2 { font-size: clamp(1.4rem, 1.05rem + 1.5vw, 2rem); margin-top: 2.4rem; }
h3 { font-size: 1.12rem; letter-spacing: -0.012em; }
p { margin: 0 0 1rem; }

a { color: var(--rust); text-underline-offset: 3px; text-decoration-thickness: 1px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--paper); padding: 0.6rem 0.9rem; z-index: 20;
  font-family: var(--sans); font-size: 0.85rem;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

/* ---------- masthead ---------- */
.nav {
  border-bottom: 1px solid var(--rule-strong);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 10;
}
.bar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1.4rem;
  padding: 0.85rem 0;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--sans); font-weight: 700; font-size: 1rem;
  letter-spacing: -0.02em; color: var(--ink); text-decoration: none;
  margin-right: auto;
}
.mark {
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 4px;
  background: var(--ink); color: var(--marker);
  font-size: 0.72rem; letter-spacing: 0.04em;
}
.links { display: flex; flex-wrap: wrap; align-items: center; gap: 0.3rem 1.05rem; }
.links > a {
  font-family: var(--sans); font-size: 0.88rem; font-weight: 600;
  color: var(--ink-soft); text-decoration: none; padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.links > a:hover { color: var(--ink); border-bottom-color: var(--rust); }
.links > a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--ink); }
.links .btn { margin-left: 0.4rem; }

/* ---------- buttons ---------- */
.btn, .ghost {
  display: inline-block; font-family: var(--sans); font-size: 0.85rem; font-weight: 700;
  letter-spacing: -0.005em; text-decoration: none; border-radius: 4px;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease),
    color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn { background: var(--ink); color: var(--paper); padding: 0.62rem 1.02rem; }
.btn:hover { background: var(--rust); transform: translateY(-1px); }
.ghost { border: 1px solid var(--rule-strong); color: var(--ink); padding: 0.58rem 1rem; }
.ghost:hover { border-color: var(--ink); transform: translateY(-1px); }

/* ---------- hero ---------- */
.page-hero {
  border-bottom: 1px solid var(--rule-strong);
  padding: 3rem 0 2.2rem;
  background:
    radial-gradient(120% 90% at 8% 0%, var(--rust-wash) 0%, transparent 58%),
    var(--paper);
}
.crumb-line {
  font-family: var(--sans); font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-soft);
  margin-bottom: 1.5rem;
}
.eyebrow {
  display: inline-block; font-family: var(--sans); font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--rust);
  border-bottom: 2px solid var(--marker); padding-bottom: 0.18rem; margin-bottom: 0.9rem;
}
.lede {
  font-size: clamp(1.02rem, 0.96rem + 0.4vw, 1.22rem);
  color: var(--ink-soft); max-width: 62ch; margin-top: 1rem;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.6rem; }
.page-hero h1, .page-hero .lede, .page-hero .hero-cta { animation: rise var(--dur) var(--ease) both; }
.page-hero .lede { animation-delay: 60ms; }
.page-hero .hero-cta { animation-delay: 110ms; }
@keyframes rise {
  from { opacity: 0.001; transform: translateY(7px); }
  to { opacity: 1; transform: none; }
}

/* ---------- mechanics strip ---------- */
.mechanics {
  list-style: none; margin: 2.2rem 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--rule-strong); border-radius: 5px; overflow: hidden;
  background: var(--card);
}
@media (max-width: 860px) { .mechanics { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .mechanics { grid-template-columns: 1fr; } }
.mech {
  padding: 1rem 1.1rem 1.15rem;
  border-right: 1px solid var(--rule);
  display: flex; flex-direction: column; gap: 0.3rem;
}
.mech:last-child { border-right: 0; }
.mech-num {
  font-family: var(--sans); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.14em;
  color: var(--rust);
}
.mech-link {
  font-family: var(--sans); font-weight: 700; font-size: 1.02rem; letter-spacing: -0.015em;
  color: var(--ink); text-decoration: none; align-self: flex-start;
  border-bottom: 3px solid var(--marker);
  transition: transform var(--dur) var(--ease);
}
.mech-link:hover { transform: translateY(-2px); }
.mech-note { font-size: 0.88rem; color: var(--ink-soft); line-height: 1.55; }

/* ---------- bands & grids ---------- */
.band { padding: 2.6rem 0; border-bottom: 1px solid var(--rule); }
.band:last-child { border-bottom: 0; }
.grid { display: grid; gap: 1.15rem; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.grid.three { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 860px) { .grid.two, .grid.three { grid-template-columns: 1fr; } }
.prose { max-width: 68ch; }
.prose > :last-child { margin-bottom: 0; }

/* ---------- cards ---------- */
.card {
  background: var(--card); border: 1px solid var(--rule);
  border-radius: 5px; padding: 1.2rem 1.25rem 1.3rem;
  box-shadow: var(--shadow);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card:hover { transform: translateY(-3px); border-color: var(--rule-strong); }
.clause { border-left: 3px solid var(--rust); }
.card-quiet { background: var(--paper-2); box-shadow: none; }
.tag {
  display: block; font-family: var(--sans); font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--ink-soft);
  margin-bottom: 0.5rem;
}
.text-link {
  font-family: var(--sans); font-size: 0.86rem; font-weight: 700; color: var(--rust);
  text-decoration: none; border-bottom: 1px solid var(--rule-strong);
  transition: border-color var(--dur) var(--ease);
}
.text-link:hover { border-bottom-color: var(--rust); }

/* ---------- ledger strip ---------- */
.ledger {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule-strong);
  margin-bottom: 2rem;
}
@media (max-width: 720px) { .ledger { grid-template-columns: repeat(2, 1fr); } }
.ledger-cell { padding: 0.95rem 1.1rem 1rem; border-right: 1px solid var(--rule); }
.ledger-cell:last-child { border-right: 0; }
.ledger-k {
  display: block; font-family: var(--sans); font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.13em; text-transform: uppercase; color: var(--rust); margin-bottom: 0.25rem;
}
.ledger-v { display: block; font-size: 0.95rem; color: var(--ink-soft); }

/* ---------- editorial devices ---------- */
.hl {
  background-image: linear-gradient(to top, var(--marker) 44%, transparent 44%);
  padding: 0 0.06em;
}
.defs, .ticks, .crosses { padding-left: 1.1rem; margin: 0 0 1rem; }
.defs li, .ticks li, .crosses li { margin-bottom: 0.5rem; }
.ticks, .crosses { list-style: none; padding-left: 0; }
.ticks li, .crosses li { position: relative; padding-left: 1.7rem; }
.ticks li::before, .crosses li::before {
  position: absolute; left: 0; top: 0.02em; font-family: var(--sans); font-weight: 700; font-size: 0.9rem;
}
.ticks li::before { content: "\2713"; color: var(--teal); }
.crosses li::before { content: "\00D7"; color: var(--rust); }

.callout {
  background: var(--paper-2); border-left: 3px solid var(--ink);
  padding: 1.1rem 1.25rem; border-radius: 0 5px 5px 0;
}
.callout-warn { background: var(--rust-wash); border-left-color: var(--rust); }
.callout h3 { margin-top: 0; }

.rule-strip {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.7rem;
  border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule-strong);
  padding: 0.85rem 0; margin: 1.8rem 0;
}
.rule-tag {
  font-family: var(--sans); font-size: 0.68rem; font-weight: 700; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--ink); background: var(--marker); padding: 0.15rem 0.5rem;
}
.rule-strip p { margin: 0; flex: 1 1 22rem; font-size: 0.98rem; }

/* ---------- numbered clauses ---------- */
.clauses { list-style: none; margin: 1.4rem 0 0; padding: 0; display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: 5px; overflow: hidden; }
.clauses > li { background: var(--card); display: grid; grid-template-columns: 3.4rem 1fr; gap: 0.2rem; padding: 1.05rem 1.2rem; }
.clauses h3 { margin: 0 0 0.3rem; }
.clauses p { margin: 0; color: var(--ink-soft); font-size: 0.97rem; }
.clause-num {
  font-family: var(--sans); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.1em;
  color: var(--rust); padding-top: 0.3rem;
}

/* ---------- glossary ---------- */
.glossary { margin: 0; display: grid; gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: 5px; overflow: hidden; }
.gloss { background: var(--card); padding: 1rem 1.2rem; }
.gloss dt { font-family: var(--sans); font-weight: 700; font-size: 1rem; letter-spacing: -0.012em; margin-bottom: 0.25rem; }
.gloss dd { margin: 0; color: var(--ink-soft); font-size: 0.97rem; }

/* ---------- tables ---------- */
.worked { width: 100%; border-collapse: collapse; margin: 1.4rem 0 0.8rem; font-family: var(--sans); font-size: 0.92rem; background: var(--card); border: 1px solid var(--rule-strong); border-radius: 5px; }
.worked caption { caption-side: top; text-align: left; font-size: 0.8rem; color: var(--ink-soft); padding-bottom: 0.6rem; }
.worked th, .worked td { text-align: left; padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--rule); }
.worked thead th { font-size: 0.7rem; letter-spacing: 0.13em; text-transform: uppercase; color: var(--ink-soft); background: var(--paper-2); }
.worked tbody tr:last-child td { border-bottom: 0; }
.worked-total { font-weight: 700; color: var(--rust); }
.caption-note { font-size: 0.86rem; color: var(--ink-soft); font-style: italic; }

/* ---------- ratio figure ---------- */
.ratio { margin: 1.6rem 0; display: grid; gap: 0.55rem; }
.ratio-row { display: grid; grid-template-columns: 6.5rem 1fr 12rem; align-items: center; gap: 0.8rem; }
@media (max-width: 720px) { .ratio-row { grid-template-columns: 6.5rem 1fr; } .ratio-v { grid-column: 2; } }
.ratio-k { font-family: var(--sans); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); }
.ratio-bar { display: block; height: 9px; background: var(--paper-2); border: 1px solid var(--rule); border-radius: 999px; overflow: hidden; }
.ratio-bar span { display: block; height: 100%; width: var(--w); background: linear-gradient(90deg, var(--rust), #d9834f); }
.ratio-v { font-size: 0.87rem; color: var(--ink-soft); }

/* ---------- FAQ ---------- */
.qa { background: var(--card); border: 1px solid var(--rule); border-radius: 5px; margin-bottom: 0.7rem; }
.qa summary { cursor: pointer; padding: 0.95rem 1.15rem; font-family: var(--sans); font-weight: 700; letter-spacing: -0.012em; list-style: none; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; float: right; color: var(--rust); font-weight: 700; }
.qa[open] summary::after { content: "\2212"; }
.qa summary:hover { color: var(--rust); }
.qa p { padding: 0 1.15rem 1.05rem; margin: 0; color: var(--ink-soft); font-size: 0.98rem; }

/* ---------- disclosure ---------- */
.disclosure {
  background: var(--paper-2); border: 1px dashed var(--rule-strong); border-radius: 5px;
  padding: 1rem 1.15rem; font-size: 0.92rem; color: var(--ink-soft); margin-top: 1.6rem;
}
.disclosure strong { color: var(--ink); }

/* ---------- footer ---------- */
.footer { border-top: 2px solid var(--ink); background: var(--paper-2); padding: 2.4rem 0 2rem; margin-top: 0; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 1.8rem; }
@media (max-width: 800px) { .foot-grid { grid-template-columns: 1fr; } }
.foot-grid p { color: var(--ink-soft); font-size: 0.94rem; margin: 0.7rem 0 0; max-width: 42ch; }
.foot-grid strong { display: block; font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink); margin-bottom: 0.7rem; }
.foot-grid a:not(.brand) { display: block; font-family: var(--sans); font-size: 0.9rem; color: var(--ink-soft); text-decoration: none; padding: 0.16rem 0; transition: color var(--dur) var(--ease); }
.foot-grid a:not(.brand):hover { color: var(--rust); }
.fine { margin-top: 2rem; padding-top: 1.2rem; border-top: 1px solid var(--rule-strong); font-size: 0.82rem; color: var(--ink-soft); max-width: 92ch; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .card:hover, .btn:hover, .ghost:hover, .mech-link:hover { transform: none; }
}