/* Artshelf docs — "Ledger" design */

:root {
  color-scheme: light;
  --paper: #f5f0e4;
  --raised: #fcf9f1;
  --sunken: #ece5d2;
  --ink: #22271f;
  --body-ink: #3a4136;
  --soft: #6b7263;
  --faint: #99a08e;
  --rule: #d8d0ba;
  --rule-soft: #e6dfcb;
  --green: #1c6b4d;
  --green-deep: #0f5238;
  --green-wash: #e3eedd;
  --red: #a23d2e;
  --red-wash: #f5e6df;
  --amber: #8a5c14;
  --amber-wash: #f2e9d0;
  --term-bg: #11190f;
  --term-ink: #d9e8cf;
  --term-soft: #8da683;
  --term-rule: #25341f;
  --shadow: 0 14px 40px rgba(46, 42, 26, 0.12);
  --fs-text: 1.25rem;      /* ~20px: body, nav, toc, prose spans */
  --fs-text-sm: 1.1rem;    /* secondary text: nav children, toc, tables */
  --fs-mono: 0.95rem;      /* commands and mono accents beside 20px serif */
  --fs-label: 0.75rem;     /* small-caps micro labels (stamps, kickers) */
  --serif: "Newsreader", "Iowan Old Style", Georgia, serif;
  --display: "Fraunces", "Newsreader", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --paper: #0d110c;
  --raised: #151b13;
  --sunken: #090c08;
  --ink: #eaeedd;
  --body-ink: #c7cfb6;
  --soft: #909a7f;
  --faint: #67705a;
  --rule: #2a3424;
  --rule-soft: #1d2519;
  --green: #6fd3a3;
  --green-deep: #93e8bf;
  --green-wash: #14241a;
  --red: #e08a76;
  --red-wash: #281512;
  --amber: #d9ab5d;
  --amber-wash: #251d0e;
  --term-bg: #090d07;
  --term-ink: #d9e8cf;
  --term-rule: #1d2917;
  --shadow: 0 16px 44px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 500px at 70% -10%, rgba(28, 107, 77, 0.05), transparent 70%),
    var(--paper);
  color: var(--body-ink);
  font-family: var(--serif);
  font-size: var(--fs-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--green); color: var(--paper); }

a { color: var(--green-deep); text-decoration-thickness: 1px; text-underline-offset: 0.22em; }
a:hover { color: var(--green); }

.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 99;
  background: var(--raised);
  padding: 8px 14px;
}
.skip:focus { left: 8px; }

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

.masthead {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}

.masthead::after {
  content: "";
  display: block;
  border-bottom: 1px solid var(--rule);
  margin-top: 2px;
}

.masthead-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  width: min(1340px, 100% - 48px);
  margin-inline: auto;
  padding: 13px 0 11px;
}

.brand {
  font-family: var(--display);
  font-weight: 620;
  font-style: italic;
  font-size: 1.4rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.brand-tag {
  font-family: var(--mono);
  font-style: normal;
  font-weight: 450;
  font-size: var(--fs-label);
  color: var(--soft);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-left: 9px;
  vertical-align: 0.18em;
}


.search-btn {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--raised);
  color: var(--soft);
  font-family: var(--mono);
  font-size: 0.88rem;
  padding: 7px 9px 7px 13px;
  cursor: pointer;
}
.search-btn:hover { border-color: var(--soft); color: var(--ink); }
.search-btn kbd {
  font-family: var(--mono);
  font-size: 0.78rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--sunken);
  padding: 1px 7px;
}

.masthead-tools { display: flex; align-items: center; gap: 12px; }

.masthead-tools .gh {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--soft);
}
.masthead-tools .gh:hover { color: var(--ink); }

.theme-btn,
.menu-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: var(--raised);
  color: var(--soft);
  cursor: pointer;
  padding: 0;
}
.theme-btn:hover,
.menu-btn:hover { color: var(--ink); border-color: var(--soft); }
.theme-btn svg, .menu-btn svg { width: 15px; height: 15px; display: block; }
.theme-btn .icon-sun, html[data-theme="dark"] .theme-btn .icon-moon { display: none; }
html[data-theme="dark"] .theme-btn .icon-sun { display: block; }

.menu-btn { display: none; }

/* ---------- frame ---------- */

.frame {
  display: grid;
  grid-template-columns: 252px minmax(0, 1fr) 232px;
  gap: 56px;
  width: min(1340px, 100% - 48px);
  margin-inline: auto;
  padding: 40px 0 90px;
}

/* ---------- sidebar ---------- */

.sidebar {
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--rule) transparent;
  padding-bottom: 20px;
}

.nav-group { margin-bottom: 26px; }

.nav-group-title {
  margin: 0 0 9px;
  font-family: var(--mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
}

.sidebar a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 4px 0;
  color: var(--body-ink);
  font-size: var(--fs-text);
  text-decoration: none;
  border-radius: 4px;
}

.sidebar a .n {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--faint);
  min-width: 2.1em;
}

.sidebar a:hover { color: var(--green-deep); }
.sidebar a[aria-current="page"] { color: var(--green-deep); font-weight: 600; }
.sidebar a[aria-current="page"] .n { color: var(--green); }

.sidebar .children {
  margin: 2px 0 4px 9px;
  border-left: 1px solid var(--rule);
  padding-left: 13px;
}
.sidebar .children a { font-size: var(--fs-text-sm); color: var(--soft); }
.sidebar .children a:hover,
.sidebar .children a[aria-current="page"] { color: var(--green-deep); }

.sidebar .ext::after { content: "↗"; font-family: var(--mono); font-size: 0.7em; color: var(--faint); margin-left: 2px; }

/* ---------- article ---------- */

.article-col { min-width: 0; max-width: 70ch; }

.kicker {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--soft);
}
.kicker .n { color: var(--green); margin-right: 6px; }

h1 {
  margin: 0 0 18px;
  font-family: var(--display);
  font-size: 2.55rem;
  font-weight: 580;
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.lede {
  margin: 0 0 8px;
  font-size: 1.4rem;
  line-height: 1.62;
  color: var(--soft);
}

article > section { margin-top: 50px; }

h2 {
  position: relative;
  margin: 0 0 20px;
  padding-bottom: 10px;
  font-family: var(--display);
  font-size: 1.7rem;
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
}
/* ledger double-rule */
h2::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  border-bottom: 1px solid var(--rule);
}

h3 {
  margin: 26px 0 10px;
  font-family: var(--display);
  font-size: 1.4rem;
  font-weight: 620;
  color: var(--ink);
}

.anchor {
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 0.78em;
  color: var(--faint);
  text-decoration: none;
  opacity: 0;
}
h2:hover .anchor, h3:hover .anchor, .cmd-head:hover .anchor { opacity: 1; }
.anchor:hover { color: var(--green); }

p, li { font-size: var(--fs-text); }
ul, ol { padding-left: 1.3em; }
li { margin: 4px 0; }
li::marker { color: var(--green); }

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

/* ---------- code ---------- */

code {
  font-family: var(--mono);
  font-size: 0.84em;
  background: var(--sunken);
  border: 1px solid var(--rule-soft);
  border-radius: 4px;
  padding: 0.1em 0.38em;
  color: var(--ink);
}

.snippet { position: relative; margin: 18px 0; }

pre {
  margin: 0;
  overflow-x: auto;
  background: var(--term-bg);
  color: var(--term-ink);
  border: 1px solid var(--term-rule);
  border-radius: 8px;
  padding: 15px 18px;
  font-family: var(--mono);
  font-size: var(--fs-mono);
  line-height: 1.66;
  scrollbar-width: thin;
  scrollbar-color: var(--term-rule) transparent;
}

pre code { background: transparent; border: 0; padding: 0; color: inherit; font-size: 1em; white-space: pre; }

pre .c { color: var(--term-soft); }

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  border: 1px solid var(--term-rule);
  border-radius: 5px;
  background: var(--term-bg);
  color: var(--term-soft);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 9px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 120ms ease;
}
.snippet:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { color: var(--term-ink); }
.copy-btn.done { color: var(--green); border-color: var(--green); opacity: 1; }

/* ---------- ledger table (the loop) ---------- */

.ledger {
  margin: 18px 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  position: relative;
}
.ledger::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  border-bottom: 1px solid var(--rule);
}

.ledger-row {
  display: grid;
  grid-template-columns: 48px 140px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 13px 2px;
  text-decoration: none;
  color: inherit;
}
.ledger-row + .ledger-row { border-top: 1px solid var(--rule-soft); }

.ledger-row .n {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--green);
}
.ledger-row .stage {
  font-family: var(--display);
  font-weight: 620;
  font-size: var(--fs-text);
  color: var(--ink);
}
.ledger-row .what { color: var(--soft); font-size: var(--fs-text); }
.ledger-row .what code { font-size: 0.8em; }
.ledger-row .cmdline {
  display: block;
  font-family: var(--mono);
  font-size: var(--fs-mono);
  color: var(--green-deep);
  margin-bottom: 3px;
}

a.ledger-row:hover .stage { color: var(--green-deep); }
a.ledger-row:hover { background: color-mix(in srgb, var(--green-wash) 50%, transparent); }

/* ---------- callouts (stamped) ---------- */

.callout {
  position: relative;
  margin: 22px 0;
  border: 1px solid var(--rule);
  border-radius: 7px;
  padding: 18px 18px 14px;
  background: var(--raised);
}

.callout-label {
  position: absolute;
  top: -0.74em;
  left: 13px;
  font-family: var(--mono);
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: var(--raised);
  border: 1px solid currentColor;
  border-radius: 3px;
  padding: 1px 8px;
}

.callout p { margin: 4px 0; font-size: var(--fs-text); }
.callout p:first-of-type { margin-top: 0; }

.callout[data-kind="boundary"] { border-color: color-mix(in srgb, var(--red) 45%, var(--rule)); }
.callout[data-kind="boundary"] .callout-label { color: var(--red); transform: rotate(-1deg); background: var(--red-wash); }

.callout[data-kind="readonly"] { border-color: color-mix(in srgb, var(--green) 40%, var(--rule)); }
.callout[data-kind="readonly"] .callout-label { color: var(--green-deep); background: var(--green-wash); }

.callout[data-kind="note"] .callout-label { color: var(--amber); background: var(--amber-wash); }

/* boundary list on overview */
.boundary-list { margin: 0; padding: 0; list-style: none; }
.boundary-list li {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr);
  gap: 14px;
  padding: 10px 0;
  align-items: baseline;
}
.boundary-list li + li { border-top: 1px solid var(--rule-soft); }
.boundary-list .stamp {
  font-family: var(--mono);
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: center;
  border: 1px solid currentColor;
  border-radius: 3px;
  padding: 2px 6px;
}
.boundary-list .stamp.refused { color: var(--red); background: var(--red-wash); transform: rotate(-1.2deg); }
.boundary-list .stamp.readonly { color: var(--green-deep); background: var(--green-wash); transform: rotate(0.8deg); }
.boundary-list .stamp.approval { color: var(--amber); background: var(--amber-wash); transform: rotate(-0.6deg); }

/* ---------- definition rows ---------- */

.def-rows { margin: 14px 0; }
.def-rows > div {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 16px;
  padding: 9px 0;
  align-items: baseline;
}
.def-rows > div + div { border-top: 1px solid var(--rule-soft); }
.def-rows dt, .def-rows .k { font-family: var(--mono); font-size: var(--fs-mono); color: var(--green-deep); }
.def-rows dd, .def-rows .v { margin: 0; color: var(--soft); font-size: var(--fs-text); }

/* ---------- command reference ---------- */

.cmd { margin-top: 44px; }

.cmd-head {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 12px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--rule);
}
.cmd-head::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  border-bottom: 1px solid var(--rule);
}
.cmd-head h2, .cmd-head h3 {
  margin: 0;
  padding: 0;
  border: 0;
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
}
.cmd-head h2::after, .cmd-head h3::after { display: none; }

.cmd-flag {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  border-radius: 3px;
  padding: 1px 7px;
  white-space: nowrap;
}
.cmd-flag.readonly { color: var(--green-deep); }
.cmd-flag.plan { color: var(--amber); }
.cmd-flag.approval { color: var(--red); }

.cmd > p { margin: 10px 0; font-size: var(--fs-text); }

table.opts {
  width: 100%;
  margin: 12px 0;
  border-collapse: collapse;
  font-size: var(--fs-text-sm);
}
table.opts th {
  font-family: var(--mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
  text-align: left;
  padding: 6px 14px 6px 0;
  border-bottom: 1px solid var(--rule);
}
table.opts td {
  padding: 7px 14px 7px 0;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: baseline;
  color: var(--soft);
}
table.opts td:first-child { font-family: var(--mono); font-size: var(--fs-mono); color: var(--ink); white-space: nowrap; }

/* ---------- toc ---------- */

.toc-col {
  position: sticky;
  top: 92px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  font-size: var(--fs-text-sm);
  scrollbar-width: thin;
  scrollbar-color: var(--rule) transparent;
}

.toc-title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
}

#toc { border-left: 1px solid var(--rule); }

#toc a {
  display: block;
  padding: 4px 0 4px 14px;
  margin-left: -1px;
  color: var(--soft);
  text-decoration: none;
  border-left: 1px solid transparent;
  line-height: 1.45;
}
#toc a:hover { color: var(--ink); }
#toc a.active { color: var(--green-deep); border-left-color: var(--green); font-weight: 600; }
#toc a.sub { padding-left: 26px; font-size: 1rem; }

/* ---------- pager ---------- */

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 70px;
  border-top: 1px solid var(--rule);
  padding-top: 6px;
  position: relative;
}
.pager::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 3px;
  border-top: 1px solid var(--rule);
}

.pager a {
  display: grid;
  gap: 3px;
  padding: 16px 4px;
  text-decoration: none;
}
.pager a.next { text-align: right; }
.pager .dir {
  font-family: var(--mono);
  font-size: var(--fs-label);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}
.pager .t { font-family: var(--display); font-weight: 620; color: var(--ink); }
.pager a:hover .t { color: var(--green-deep); }

/* ---------- search palette ---------- */

.palette-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: color-mix(in srgb, var(--ink) 26%, transparent);
  backdrop-filter: blur(2px);
}

.palette {
  position: fixed;
  z-index: 81;
  top: 14vh;
  left: 50%;
  transform: translateX(-50%);
  width: min(620px, calc(100vw - 32px));
  background: var(--raised);
  border: 1px solid var(--rule);
  border-radius: 10px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.palette::before {
  content: "";
  display: block;
  border-top: 3px double var(--green);
}

.palette input {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 1.05rem;
  padding: 15px 18px;
  outline: none;
}
.palette input::placeholder { color: var(--faint); }

.palette-results { max-height: 46vh; overflow-y: auto; padding: 8px; scrollbar-width: thin; }

.palette-results a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 9px 12px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--body-ink);
  font-size: var(--fs-text-sm);
}
.palette-results a .where {
  font-family: var(--mono);
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  white-space: nowrap;
}
.palette-results a.sel,
.palette-results a:hover { background: var(--green-wash); color: var(--green-deep); }
.palette-results .empty {
  padding: 16px 12px;
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--faint);
}

/* ---------- footer ---------- */

.colophon {
  border-top: 1px solid var(--rule);
  margin-top: 30px;
}
.colophon-inner {
  width: min(1340px, 100% - 48px);
  margin-inline: auto;
  padding: 22px 0 36px;
  display: flex;
  gap: 18px;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--faint);
}
.colophon a { color: var(--soft); }

/* ---------- entrance ---------- */

@media (prefers-reduced-motion: no-preference) {
  article > * {
    animation: rise 420ms cubic-bezier(0.2, 0.7, 0.3, 1) both;
  }
  article > *:nth-child(2) { animation-delay: 40ms; }
  article > *:nth-child(3) { animation-delay: 80ms; }
  article > *:nth-child(4) { animation-delay: 120ms; }
  article > *:nth-child(5) { animation-delay: 160ms; }
  article > *:nth-child(n + 6) { animation-delay: 200ms; }

  @keyframes rise {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: none; }
  }
}

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

@media (max-width: 1180px) {
  .frame { grid-template-columns: 240px minmax(0, 1fr); gap: 44px; }
  .toc-col { display: none; }
}

@media (max-width: 880px) {
  .menu-btn { display: inline-flex; }
  .search-btn span { display: none; }
  .search-btn { gap: 0; padding: 7px 9px; }
  .masthead-tools .gh { display: none; }

  .frame { display: block; padding-top: 26px; }

  .sidebar {
    position: fixed;
    inset: 0;
    top: 61px;
    z-index: 60;
    max-height: none;
    background: var(--paper);
    padding: 26px 24px 40px;
    transform: translateX(-102%);
    transition: transform 200ms ease;
    border-right: 1px solid var(--rule);
  }
  body.nav-open .sidebar { transform: none; }
  body.nav-open { overflow: hidden; }

  .article-col { max-width: none; }
  h1 { font-size: 2.05rem; }

  .ledger-row { grid-template-columns: 36px minmax(0, 1fr); }
  .ledger-row .what { grid-column: 2; }

  .boundary-list li, .def-rows > div { grid-template-columns: 1fr; gap: 5px; }
  .boundary-list .stamp { justify-self: start; }
}

@media (max-width: 560px) {
  .masthead-inner, .colophon-inner { width: calc(100% - 32px); }
  h1 { font-size: 1.78rem; }
  pre { font-size: 0.88rem; padding: 12px 14px; }
  .pager { grid-template-columns: 1fr; }
  .pager a.next { text-align: left; }
}