/* ==========================================================================
   ian-operator — documentary ledger stylesheet
   One hand-written file. No framework, no build step, no remote assets.
   ========================================================================== */

:root {
  color-scheme: light dark;

  --paper:        #f6f1e6;
  --paper-2:      #efe8d8;
  --paper-sunk:   #e9e1cd;
  --ink:          #23201a;
  --ink-2:        #4a453a;
  --ink-3:        #6d6656;
  --rule:         #cdc3ab;
  --rule-strong:  #a99d80;
  --rule-hair:    #ded5bf;

  --seal-allow:   #3f6b45;
  --seal-approve: #8a5a12;
  --seal-block:   #8d2f26;
  --seal-taint:   #5c4a86;

  --allow-bg:     #e3ebdf;
  --approve-bg:   #f2e6cd;
  --block-bg:     #f2dedb;
  --taint-bg:     #e6e1ef;

  --term-bg:      #201d17;
  --term-ink:     #ddd6c4;
  --term-dim:     #8f8879;
  --term-accent:  #c9a75a;
  --term-green:   #8fae74;
  --term-red:     #cf7d70;

  --link:         #6a4a1f;
  --link-visited: #55432a;

  --texture-opacity: 0.22;
  --texture-blend: multiply;

  /* SVG palette */
  --svg-ink:      #23201a;
  --svg-ink-2:    #5b5445;
  --svg-rule:     #b4a98d;
  --svg-fill:     #efe8d8;
  --svg-fill-2:   #e2d9c2;
  --svg-allow:    #3f6b45;
  --svg-allow-bg: #dfe8da;
  --svg-appr:     #8a5a12;
  --svg-appr-bg:  #f0e2c5;
  --svg-block:    #8d2f26;
  --svg-block-bg: #f0d9d5;
  --svg-taint:    #5c4a86;
  --svg-taint-bg: #e4dff0;
  --svg-paper:    #f6f1e6;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", Times, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --measure: 34rem;
  --margin-col: 15.5rem;
  --clause-col: 3.6rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:        #16150f;
    --paper-2:      #1d1b14;
    --paper-sunk:   #211f17;
    --ink:          #e6dfcd;
    --ink-2:        #bdb5a0;
    --ink-3:        #948c78;
    --rule:         #3d3829;
    --rule-strong:  #5c553f;
    --rule-hair:    #2c2820;

    --seal-allow:   #8fbb8c;
    --seal-approve: #d9ac57;
    --seal-block:   #e08a7c;
    --seal-taint:   #a99ad4;

    --allow-bg:     #1e2a1e;
    --approve-bg:   #2e2513;
    --block-bg:     #2e1c19;
    --taint-bg:     #221e2e;

    --term-bg:      #0d0c09;
    --term-ink:     #d8d1bf;
    --term-dim:     #8f8776;
    --term-accent:  #d9b563;
    --term-green:   #93b87b;
    --term-red:     #d98a7c;

    --link:         #d6b071;
    --link-visited: #bda07a;

    --texture-opacity: 0.14;
    --texture-blend: screen;

    --svg-ink:      #e6dfcd;
    --svg-ink-2:    #a79f8b;
    --svg-rule:     #5e5641;
    --svg-fill:     #211f17;
    --svg-fill-2:   #2b2820;
    --svg-allow:    #8fbb8c;
    --svg-allow-bg: #1d2a1d;
    --svg-appr:     #d9ac57;
    --svg-appr-bg:  #2d2413;
    --svg-block:    #e08a7c;
    --svg-block-bg: #2d1b18;
    --svg-taint:    #a99ad4;
    --svg-taint-bg: #211d2c;
    --svg-paper:    #16150f;
  }
}

/* --- base ---------------------------------------------------------------- */

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

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.58;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("vellum.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  opacity: var(--texture-opacity);
  mix-blend-mode: var(--texture-blend);
  pointer-events: none;
  z-index: 0;
}

.page { position: relative; z-index: 1; }

p { margin: 0 0 0.85em; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--link);
  text-decoration-color: var(--rule-strong);
  text-underline-offset: 2px;
}
a:visited { color: var(--link-visited); }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible,
.skip:focus {
  outline: 2px solid var(--seal-approve);
  outline-offset: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--paper-2);
  border: 1px solid var(--rule-strong);
  padding: 0.5rem 0.9rem;
  z-index: 20;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

/* --- shell --------------------------------------------------------------- */

.sheet {
  max-width: 74rem;
  margin: 0 auto;
  padding: 0 1.25rem 5rem;
}

/* --- masthead ------------------------------------------------------------ */

.masthead {
  border-bottom: 3px double var(--rule-strong);
  padding: 2.4rem 0 1.1rem;
  margin-bottom: 0;
}

.docket {
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
}
.docket span { white-space: nowrap; }

.masthead h1 {
  font-size: clamp(1.85rem, 1.2rem + 2.6vw, 3.1rem);
  line-height: 1.08;
  font-weight: 600;
  letter-spacing: -0.012em;
  margin: 0 0 0.5rem;
}

.masthead .standfirst {
  font-size: 1.06rem;
  color: var(--ink-2);
  max-width: 40rem;
  margin: 0;
}

.masthead .folio {
  font-family: var(--sans);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0.95rem 0 0;
}

/* --- document index (navigation as a ruled contents table) --------------- */

.index {
  border-bottom: 1px solid var(--rule-strong);
  padding: 0.4rem 0 0.1rem;
}

.index h2 {
  font-family: var(--sans);
  font-size: 0.64rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 600;
  margin: 0.7rem 0 0.4rem;
}

.index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0;
}

.index li {
  border-top: 1px solid var(--rule-hair);
  padding: 0.42rem 0.7rem 0.42rem 0;
}

.index a {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  text-decoration: none;
  color: var(--ink);
}
.index a:hover .idx-title { text-decoration: underline; }

.idx-no {
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  min-width: 1.6rem;
}
.idx-title { font-size: 0.94rem; }

.index li[aria-current="page"],
.index a[aria-current="page"] { font-weight: 600; }
.index a[aria-current="page"] .idx-title { text-decoration: underline; text-decoration-style: dotted; }

/* --- articles + clauses -------------------------------------------------- */

.article { margin: 0; }

.article > h2 {
  font-size: 1.02rem;
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: 0.03em;
  margin: 3rem 0 0;
  padding-bottom: 0.55rem;
  border-bottom: 2px solid var(--rule-strong);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
}
.article > h2 .artno {
  font-size: 0.63rem;
  letter-spacing: 0.19em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.clause {
  display: grid;
  grid-template-columns: var(--clause-col) minmax(0, 1fr) var(--margin-col);
  column-gap: 1.9rem;
  border-bottom: 1px solid var(--rule-hair);
  padding: 1.35rem 0 1.4rem;
  align-items: start;
}

.cn {
  grid-column: 1;
  grid-row: 1;
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  padding-top: 0.35rem;
  margin: 0;
  font-variant-numeric: tabular-nums;
}

.cb {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
}
/* the reading measure applies to prose only; figures, code, terminals and ruled
   tables fill the clause column */
.cb > p,
.cb > h3,
.cb > h4,
.cb > ol,
.cb > .doctrine,
.cb > dl.ledger,
.cb > .smallcaps { max-width: var(--measure); }
.cb.full > * { max-width: none; }

.cb h3 {
  font-size: 1.14rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  line-height: 1.28;
}
.cb h4 {
  font-family: var(--sans);
  font-size: 0.73rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}

.sidenote {
  grid-column: 3;
  grid-row: 1;
  font-size: 0.79rem;
  line-height: 1.5;
  color: var(--ink-2);
  border-left: 1px solid var(--rule);
  padding: 0.15rem 0 0.15rem 0.85rem;
  min-width: 0;
}
.sidenote .sn-label {
  display: block;
  font-family: var(--sans);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 0.28rem;
}
.sidenote code { font-size: 0.9em; }

/* content that spans the measure + margin column */
.wide { grid-column: 2 / -1; grid-row: auto; min-width: 0; max-width: none; }

/* --- lists --------------------------------------------------------------- */

.cb ul, .cb ol { margin: 0.6rem 0 0.9rem; padding-left: 1.25rem; }
.cb li { margin-bottom: 0.4rem; }

ul.ruled {
  list-style: none;
  padding: 0;
  margin: 0.7rem 0 0.4rem;
}
ul.ruled > li {
  border-top: 1px solid var(--rule-hair);
  padding: 0.5rem 0;
  margin: 0;
  display: grid;
  grid-template-columns: 8.5rem minmax(0, 1fr);
  gap: 0.2rem 1rem;
}
ul.ruled > li:last-child { border-bottom: 1px solid var(--rule-hair); }
ul.ruled .k {
  font-family: var(--mono);
  font-size: 0.79rem;
  color: var(--ink-2);
  overflow-wrap: anywhere;
}

@media (max-width: 34rem) {
  ul.ruled > li { grid-template-columns: minmax(0, 1fr); }
}

/* --- inline typography --------------------------------------------------- */

code, kbd, samp {
  font-family: var(--mono);
  font-size: 0.84em;
}
.cb > p code, li code, td code, .sidenote code, dd code {
  background: var(--paper-sunk);
  border: 1px solid var(--rule-hair);
  border-radius: 2px;
  padding: 0.06em 0.28em;
  overflow-wrap: anywhere;
}

.lede { font-size: 1.08rem; color: var(--ink-2); }

.smallcaps {
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.ref {
  font-family: var(--mono);
  font-size: 0.78em;
  color: var(--ink-3);
  white-space: nowrap;
}

.fnref {
  font-family: var(--sans);
  font-size: 0.68em;
  vertical-align: super;
  line-height: 0;
  text-decoration: none;
  padding: 0 0.1em;
}

/* --- seals / stamps (approval-gate motif) -------------------------------- */

.seal {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border: 1.5px solid currentColor;
  border-radius: 2px;
  white-space: nowrap;
  vertical-align: 0.06em;
}
.seal.allow   { color: var(--seal-allow);   background: var(--allow-bg); }
.seal.approve { color: var(--seal-approve); background: var(--approve-bg); }
.seal.block   { color: var(--seal-block);   background: var(--block-bg); }
.seal.taint   { color: var(--seal-taint);   background: var(--taint-bg); }
.seal.plain   { color: var(--ink-3);        background: var(--paper-sunk); }

.stamp {
  border: 2px solid var(--seal-approve);
  color: var(--seal-approve);
  background: var(--approve-bg);
  padding: 0.9rem 1.1rem;
  margin: 1.1rem 0;
  font-family: var(--sans);
  font-size: 0.86rem;
  line-height: 1.5;
  position: relative;
}
.stamp .stamp-head {
  display: block;
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.stamp p { color: var(--ink); margin-bottom: 0.5rem; }
.stamp.block { border-color: var(--seal-block); color: var(--seal-block); background: var(--block-bg); }
.stamp.allow { border-color: var(--seal-allow); color: var(--seal-allow); background: var(--allow-bg); }

/* --- tables -------------------------------------------------------------- */

.scroll {
  overflow-x: auto;
  margin: 1rem 0 1.2rem;
  border-top: 2px solid var(--rule-strong);
  border-bottom: 2px solid var(--rule-strong);
  max-width: 100%;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.85rem;
  min-width: 30rem;
}
caption {
  caption-side: top;
  text-align: left;
  font-family: var(--sans);
  font-size: 0.66rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 0 0 0.5rem;
}
th, td {
  text-align: left;
  padding: 0.5rem 0.85rem 0.5rem 0;
  border-bottom: 1px solid var(--rule-hair);
  vertical-align: top;
}
thead th {
  font-family: var(--sans);
  font-size: 0.63rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 600;
  border-bottom: 1px solid var(--rule-strong);
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: none; }
td.mono, th.mono { font-family: var(--mono); font-size: 0.79rem; }
td.num { font-variant-numeric: tabular-nums; white-space: nowrap; }

/* --- figures + svg ------------------------------------------------------- */

figure {
  margin: 1.4rem 0 1.6rem;
  border-top: 2px solid var(--rule-strong);
  padding-top: 0.75rem;
}
figure svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}
figcaption {
  font-size: 0.82rem;
  color: var(--ink-2);
  margin-top: 0.7rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--rule-hair);
  max-width: 46rem;
}
figcaption b {
  font-family: var(--sans);
  font-size: 0.63rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 600;
  display: block;
  margin-bottom: 0.25rem;
}

svg text { font-family: var(--sans); }

/* --- code + terminal ----------------------------------------------------- */

pre {
  margin: 0;
  overflow-x: auto;
  max-width: 100%;
}

.code {
  border: 1px solid var(--rule);
  background: var(--paper-2);
  margin: 1.1rem 0 1.3rem;
}
.code .code-head {
  font-family: var(--mono);
  font-size: 0.71rem;
  color: var(--ink-3);
  padding: 0.42rem 0.8rem;
  border-bottom: 1px solid var(--rule);
  background: var(--paper-sunk);
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.9rem;
  justify-content: space-between;
}
.code pre {
  padding: 0.85rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.79rem;
  line-height: 1.62;
  color: var(--ink);
  tab-size: 2;
}
.code .cmt { color: var(--ink-3); font-style: italic; }
.code .kw  { color: var(--seal-block); }
.code .str { color: var(--seal-allow); }
.code .fn  { color: var(--seal-approve); }

.term {
  background: var(--term-bg);
  border: 1px solid var(--rule-strong);
  margin: 1.2rem 0 1.4rem;
  color: var(--term-ink);
}
.term .term-head {
  font-family: var(--sans);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--term-dim);
  padding: 0.45rem 0.9rem;
  border-bottom: 1px solid #3a352a;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.9rem;
  justify-content: space-between;
}
.term pre {
  padding: 0.9rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  line-height: 1.72;
  color: var(--term-ink);
}
.term .p  { color: var(--term-accent); }
.term .c  { color: var(--term-ink); }
.term .d  { color: var(--term-dim); }
.term .g  { color: var(--term-green); }
.term .r  { color: var(--term-red); }
.term .y  { color: var(--term-accent); }

/* --- definition ledger --------------------------------------------------- */

dl.ledger { margin: 0.8rem 0 1rem; }
dl.ledger dt {
  font-family: var(--mono);
  font-size: 0.81rem;
  color: var(--ink);
  border-top: 1px solid var(--rule-hair);
  padding-top: 0.5rem;
  overflow-wrap: anywhere;
}
dl.ledger dd {
  margin: 0.2rem 0 0.55rem;
  font-size: 0.92rem;
  color: var(--ink-2);
}

/* --- callout / marginal rule --------------------------------------------- */

.doctrine {
  border-left: 3px solid var(--rule-strong);
  padding: 0.15rem 0 0.15rem 1.1rem;
  margin: 1.1rem 0;
  font-size: 1.02rem;
}
.doctrine cite {
  display: block;
  font-style: normal;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-3);
  margin-top: 0.45rem;
}

/* --- footnotes ----------------------------------------------------------- */

.footnotes {
  border-top: 3px double var(--rule-strong);
  margin-top: 3rem;
  padding-top: 1rem;
  font-size: 0.82rem;
  color: var(--ink-2);
}
.footnotes h2 {
  font-family: var(--sans);
  font-size: 0.63rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 600;
  margin: 0 0 0.7rem;
}
.footnotes ol { margin: 0; padding-left: 1.4rem; }
.footnotes li { margin-bottom: 0.5rem; }
.footnotes li:target { background: var(--approve-bg); }

/* --- colophon ------------------------------------------------------------ */

.colophon {
  border-top: 1px solid var(--rule-strong);
  margin-top: 2.6rem;
  padding-top: 1rem;
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.6rem;
  justify-content: space-between;
}
.colophon nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.1rem; }

/* --- responsive collapse ------------------------------------------------- */

@media (max-width: 68rem) {
  .clause {
    grid-template-columns: var(--clause-col) minmax(0, 1fr);
  }
  .cb { max-width: none; }
  .sidenote {
    grid-column: 2;
    grid-row: auto;
    margin-top: 0.9rem;
    border-left: 2px solid var(--rule);
    background: var(--paper-2);
    padding: 0.6rem 0.75rem 0.6rem 0.85rem;
  }
  .wide { grid-column: 2; }
}

@media (max-width: 40rem) {
  body { font-size: 16px; }
  :root { --clause-col: 2.6rem; }
  .sheet { padding: 0 0.9rem 3.5rem; }
  .clause { column-gap: 0.85rem; }
  .index ol { grid-template-columns: minmax(0, 1fr); }
  .masthead { padding-top: 1.6rem; }
  .code pre, .term pre { font-size: 0.72rem; }
}

@media print {
  body::before { display: none; }
  .index, .colophon { display: none; }
}