/* ==========================================================================
   assetfarmer — pipeline-flow documentation site
   One hand-written stylesheet. No framework, no build step, no remote assets.
   ========================================================================== */

:root {
  color-scheme: light dark;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  /* palette derived from the conveyor plate: sand / olive / rust / slate */
  --paper: #f4efe4;
  --paper-2: #eae3d4;
  --paper-3: #ded5c2;
  --ink: #23292a;
  --ink-2: #4b5553;
  --ink-3: #6f7873;
  --rule: #cdc3ae;
  --rule-2: #b9ac93;
  --accent: #b0501c;
  --accent-soft: #f0dccd;
  --olive: #5f6f42;
  --olive-soft: #e2e3d0;
  --shadow: 0 1px 0 rgba(35, 41, 42, .06);

  /* terminal chrome is deliberately one look in both themes */
  --term-bg: #1d2321;
  --term-bar: #2b3230;
  --term-ink: #ddd6c6;
  --term-dim: #8e968f;
  --term-green: #a9c07a;
  --term-rust: #e08a54;
  --term-blue: #8fb0bd;

  /* diagram tokens — every inline SVG paints from these */
  --svg-bg: #ffffff;
  --svg-band: #eae3d4;
  --svg-band-2: #f2ece0;
  --svg-node: #ffffff;
  --svg-node-2: #e6e8d6;
  --svg-node-3: #f4ded0;
  --svg-stroke: #6f7873;
  --svg-stroke-2: #b0a894;
  --svg-ink: #23292a;
  --svg-dim: #6f7873;
  --svg-accent: #b0501c;
  --svg-olive: #5f6f42;
  --svg-key: #c23fb0;
  --svg-grid: #d6cdb9;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #171b1a;
    --paper-2: #1f2523;
    --paper-3: #272e2c;
    --ink: #e7e1d4;
    --ink-2: #bab3a3;
    --ink-3: #8e9086;
    --rule: #333c39;
    --rule-2: #465049;
    --accent: #e08a54;
    --accent-soft: #33251c;
    --olive: #a3b578;
    --olive-soft: #232a20;
    --shadow: 0 1px 0 rgba(0, 0, 0, .3);

    --svg-bg: #1c2220;
    --svg-band: #232b28;
    --svg-band-2: #1f2624;
    --svg-node: #262e2b;
    --svg-node-3: #33251c;
    --svg-node-2: #2a3128;
    --svg-stroke: #8e9086;
    --svg-stroke-2: #5a635d;
    --svg-ink: #e7e1d4;
    --svg-dim: #9aa097;
    --svg-accent: #e08a54;
    --svg-olive: #a3b578;
    --svg-key: #d97ec8;
    --svg-grid: #333c39;
  }
}

:root[data-theme="dark"] {
  --paper: #171b1a;
  --paper-2: #1f2523;
  --paper-3: #272e2c;
  --ink: #e7e1d4;
  --ink-2: #bab3a3;
  --ink-3: #8e9086;
  --rule: #333c39;
  --rule-2: #465049;
  --accent: #e08a54;
  --accent-soft: #33251c;
  --olive: #a3b578;
  --olive-soft: #232a20;
  --svg-bg: #1c2220;
  --svg-band: #232b28;
  --svg-band-2: #1f2624;
  --svg-node: #262e2b;
  --svg-node-2: #2a3128;
  --svg-node-3: #33251c;
  --svg-stroke: #8e9086;
  --svg-stroke-2: #5a635d;
  --svg-ink: #e7e1d4;
  --svg-dim: #9aa097;
  --svg-accent: #e08a54;
  --svg-olive: #a3b578;
  --svg-key: #d97ec8;
  --svg-grid: #333c39;
}

:root[data-theme="light"] {
  --paper: #f4efe4;
  --paper-2: #eae3d4;
  --paper-3: #ded5c2;
  --ink: #23292a;
  --ink-2: #4b5553;
  --ink-3: #6f7873;
  --rule: #cdc3ae;
  --rule-2: #b9ac93;
  --accent: #b0501c;
  --accent-soft: #f0dccd;
  --olive: #5f6f42;
  --olive-soft: #e2e3d0;
  --svg-bg: #ffffff;
  --svg-band: #eae3d4;
  --svg-band-2: #f2ece0;
  --svg-node: #ffffff;
  --svg-node-2: #e6e8d6;
  --svg-node-3: #f4ded0;
  --svg-stroke: #6f7873;
  --svg-stroke-2: #b0a894;
  --svg-ink: #23292a;
  --svg-dim: #6f7873;
  --svg-accent: #b0501c;
  --svg-olive: #5f6f42;
  --svg-key: #c23fb0;
  --svg-grid: #d6cdb9;
}

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

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.62;
  overflow-x: hidden;
  position: relative;
}

/* the conveyor plate, held back to a whisper */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("conveyor.png");
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
  opacity: .055;
  pointer-events: none;
  z-index: 0;
}

@media (prefers-color-scheme: dark) {
  body::before { opacity: .06; }
}
:root[data-theme="dark"] body::before { opacity: .06; }
:root[data-theme="light"] body::before { opacity: .055; }

.wrap {
  position: relative;
  z-index: 1;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px 96px;
}

h1, h2, h3, h4 {
  line-height: 1.22;
  letter-spacing: -.011em;
  margin: 0 0 .5em;
  font-weight: 620;
}

h1 { font-size: clamp(1.65rem, 1.1rem + 2.1vw, 2.5rem); }
h2 { font-size: clamp(1.28rem, 1.02rem + 1.05vw, 1.6rem); }
h3 { font-size: 1.08rem; }
h4 { font-size: .95rem; }

p { margin: 0 0 1.05em; }
ul, ol { margin: 0 0 1.1em; padding-left: 1.25em; }
li { margin-bottom: .35em; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

code, kbd, samp, pre, .mono {
  font-family: var(--font-mono);
  font-variant-ligatures: none;
  -webkit-font-variant-ligatures: none;
  font-feature-settings: "liga" 0, "calt" 0;
}

code, kbd, samp { font-size: .875em; }

p code, li code, td code, th code, figcaption code, dd code, dt code {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: .06em .32em;
  overflow-wrap: break-word;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 2.5rem 0;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--paper-2);
  color: var(--ink);
  padding: .6rem 1rem;
  border: 1px solid var(--rule-2);
  z-index: 40;
}
.skip:focus { left: 12px; top: 12px; }

.mono { font-family: var(--font-mono); }
.dim { color: var(--ink-3); }

.lede {
  font-size: 1.08rem;
  color: var(--ink-2);
  max-width: 68ch;
}

/* --- the stage rail (site navigation, drawn as the line itself) ---------- */

.rail-zone {
  position: relative;
  z-index: 2;
  border-bottom: 1px solid var(--rule);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: blur(3px);
}

.rail-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 10px 20px 12px;
}

.rail-label {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 6px;
  display: flex;
  gap: .9em;
  flex-wrap: wrap;
  align-items: baseline;
}
.rail-label span + span::before {
  content: "·";
  margin-right: .9em;
  color: var(--rule-2);
}

.rail-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.rail {
  display: flex;
  align-items: stretch;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: max-content;
}

.rail li { margin: 0; display: flex; align-items: stretch; }

.rail-node {
  display: block;
  text-decoration: none;
  color: var(--ink-2);
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 5px 11px 6px;
  min-width: 108px;
  transition: background .12s ease, border-color .12s ease;
}
.rail-node:hover { background: var(--paper-3); border-color: var(--rule-2); }

.rail-node .n {
  display: block;
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .1em;
  color: var(--ink-3);
}
.rail-node .t {
  display: block;
  font-size: .8rem;
  font-weight: 600;
  line-height: 1.25;
  white-space: nowrap;
}

.rail-node[aria-current="page"] {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--ink);
}
.rail-node[aria-current="page"] .n { color: var(--accent); }

.rail-node.is-fork { border-style: dashed; }

.rail-arrow {
  align-self: center;
  color: var(--rule-2);
  font-family: var(--font-mono);
  font-size: .85rem;
  padding: 0 7px;
  user-select: none;
}

/* --- masthead strip (not a hero: a line header) -------------------------- */

.masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  padding: 22px 0 8px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 26px;
}

.masthead .brand {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -.01em;
  color: var(--ink);
  text-decoration: none;
}
.masthead .stage-tag {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--accent);
  padding: 2px 8px;
  border-radius: 2px;
}
.masthead .meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .68rem;
  color: var(--ink-3);
  letter-spacing: .03em;
}

/* --- page head ----------------------------------------------------------- */

.pagehead { margin: 0 0 34px; max-width: 74ch; }
.pagehead h1 { margin-bottom: .3em; }
.pagehead .subline {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--ink-3);
  letter-spacing: .04em;
  margin-bottom: .9em;
}

/* --- horizontal node track (the left-to-right line) ---------------------- */

.track-zone { margin: 0 0 34px; }

.track-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 4px 2px 12px;
  scrollbar-width: thin;
}

.track {
  display: flex;
  align-items: stretch;
  min-width: max-content;
  list-style: none;
  margin: 0;
  padding: 0;
}
.track li { margin: 0; display: flex; align-items: stretch; }

.track-node {
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 178px;
  padding: 11px 13px 13px;
  background: var(--paper-2);
  border: 1px solid var(--rule-2);
  border-top: 3px solid var(--olive);
  border-radius: 4px;
  text-decoration: none;
  color: inherit;
}
.track-node:hover { background: var(--paper-3); }
.track-node.is-fork { border-top-color: var(--accent); border-style: dashed; border-top-style: solid; }

.track-node .k {
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .11em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.track-node .h {
  font-weight: 640;
  font-size: .95rem;
  line-height: 1.25;
  color: var(--ink);
}
.track-node .m {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--accent);
  word-break: break-all;
}
.track-node .d {
  font-size: .78rem;
  color: var(--ink-2);
  line-height: 1.4;
}

.track-arrow {
  align-self: center;
  padding: 0 8px;
  color: var(--rule-2);
  flex: none;
}
.track-arrow svg { display: block; width: 30px; height: 14px; }

/* --- vertical flow spine ------------------------------------------------- */

.spine { margin: 0; padding: 0; list-style: none; counter-reset: spine; }

.spine > li {
  position: relative;
  padding: 0 0 40px 0;
  margin: 0;
}

.stage {
  position: relative;
  padding-left: 0;
}

.stage-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  padding: 0 0 4px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 18px;
}

.stage-head .marker {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--paper);
  background: var(--ink);
  border-radius: 2px;
  padding: 2px 7px;
  flex: none;
}
.stage-head h2, .stage-head h3 { margin: 0; }
.stage-head .file {
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--accent);
  margin-left: auto;
}

.flow-arrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 34px;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
}
.flow-arrow svg { flex: none; width: 16px; height: 34px; }
.flow-arrow .lbl { color: var(--ink-3); }

/* --- panels, callouts, quotes -------------------------------------------- */

.panel {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 5px;
  padding: 18px 20px;
  margin: 0 0 22px;
}

.panel > :last-child { margin-bottom: 0; }

.callout {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  padding: 14px 18px;
  border-radius: 0 4px 4px 0;
  margin: 0 0 22px;
}
.callout.olive { border-left-color: var(--olive); background: var(--olive-soft); }
.callout > :last-child { margin-bottom: 0; }
.callout .tag {
  display: block;
  font-family: var(--font-mono);
  font-size: .65rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .35em;
}
.callout.olive .tag { color: var(--olive); }

.pull {
  margin: 30px 0;
  padding: 4px 0 4px 22px;
  border-left: 4px solid var(--rule-2);
  font-size: clamp(1.05rem, .96rem + .45vw, 1.28rem);
  line-height: 1.42;
  color: var(--ink);
  font-weight: 480;
  letter-spacing: -.008em;
}
.pull p { margin-bottom: .4em; }
.pull cite {
  display: block;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--ink-3);
  letter-spacing: .04em;
}

/* --- figures & diagrams -------------------------------------------------- */

figure { margin: 0 0 30px; }

.fig {
  border: 1px solid var(--rule);
  border-radius: 5px;
  background: var(--svg-bg);
  overflow: hidden;
}

.fig-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
}

.fig svg {
  display: block;
  width: 100%;
  height: auto;
  min-width: 640px;
}
.fig.wide svg { min-width: 820px; }
.fig.xwide svg { min-width: 940px; }

figcaption {
  font-size: .83rem;
  line-height: 1.5;
  color: var(--ink-2);
  padding: 11px 14px;
  border-top: 1px solid var(--rule);
  background: var(--paper-2);
}
figcaption b, figcaption strong { color: var(--ink); font-weight: 620; }

/* SVG text defaults */
.fig svg text {
  font-family: var(--font-sans);
  fill: var(--svg-ink);
}
.fig svg text.mono, .fig svg .mono, .fig svg .mono text {
  font-family: var(--font-mono);
  font-variant-ligatures: none;
  font-feature-settings: "liga" 0, "calt" 0;
}
.fig svg .dimtext { fill: var(--svg-dim); }

/* --- terminal ------------------------------------------------------------ */

.term {
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid #121615;
  background: var(--term-bg);
  margin: 0 0 26px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .14);
}

.term-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--term-bar);
  padding: 8px 12px;
  border-bottom: 1px solid #121615;
}
.term-bar .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: #4d5654; flex: none;
}
.term-bar .dot:nth-child(1) { background: #c05a3c; }
.term-bar .dot:nth-child(2) { background: #c2a24c; }
.term-bar .dot:nth-child(3) { background: #7c9a54; }
.term-bar .title {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--term-dim);
  margin-left: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.term-body {
  margin: 0;
  padding: 14px 16px 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: .78rem;
  line-height: 1.62;
  color: var(--term-ink);
  white-space: pre;
  scrollbar-width: thin;
}

.term-body .pr { color: var(--term-green); }
.term-body .cmd { color: var(--term-ink); }
.term-body .fl { color: var(--term-blue); }
.term-body .ok { color: var(--term-green); }
.term-body .bad { color: var(--term-rust); }
.term-body .cm { color: var(--term-dim); }
.term-body .k { color: var(--term-blue); }

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

.table-scroll {
  overflow-x: auto;
  margin: 0 0 26px;
  border: 1px solid var(--rule);
  border-radius: 5px;
  scrollbar-width: thin;
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 540px;
  font-size: .86rem;
  background: var(--paper-2);
}

caption {
  caption-side: top;
  text-align: left;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 10px 14px 8px;
  background: var(--paper-2);
  border-bottom: 1px solid var(--rule);
}

th, td {
  text-align: left;
  padding: 9px 14px;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
thead th {
  font-size: .72rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--ink-3);
  background: var(--paper-3);
  font-weight: 620;
}
tbody tr:last-child td { border-bottom: 0; }
td.num, th.num { font-family: var(--font-mono); white-space: nowrap; }
td .yes { color: var(--olive); font-weight: 620; }
td .no { color: var(--ink-3); }

/* --- stat blocks --------------------------------------------------------- */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: 5px;
  overflow: hidden;
  margin: 0 0 26px;
  list-style: none;
  padding: 0;
}
.stats li { margin: 0; background: var(--paper-2); padding: 13px 15px 14px; }
.stats .v {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.32rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.15;
}
.stats .l {
  display: block;
  font-size: .74rem;
  color: var(--ink-3);
  line-height: 1.35;
  margin-top: 3px;
}

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

.codeblock {
  border: 1px solid var(--rule);
  border-radius: 5px;
  overflow: hidden;
  margin: 0 0 26px;
  background: var(--paper-2);
}

.codeblock .src {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--ink-3);
  background: var(--paper-3);
  padding: 7px 13px;
  border-bottom: 1px solid var(--rule);
}
.codeblock .src .path { color: var(--accent); }

.codeblock pre {
  margin: 0;
  padding: 13px 15px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: .78rem;
  line-height: 1.6;
  color: var(--ink);
  white-space: pre;
  scrollbar-width: thin;
}
.codeblock pre .c { color: var(--ink-3); }
.codeblock pre .kw { color: var(--accent); }
.codeblock pre .st { color: var(--olive); }
.codeblock .note {
  font-size: .8rem;
  color: var(--ink-2);
  padding: 10px 15px;
  border-top: 1px solid var(--rule);
}

/* --- definition-ish grids ------------------------------------------------ */

.pairs {
  display: grid;
  grid-template-columns: minmax(140px, max-content) 1fr;
  gap: 8px 20px;
  margin: 0 0 24px;
  font-size: .88rem;
}
.pairs dt {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--accent);
  word-break: break-word;
}
.pairs dd { margin: 0; color: var(--ink-2); }

/* --- fork block ---------------------------------------------------------- */

.forks {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}
.forks li {
  margin: 0;
  border: 1px dashed var(--rule-2);
  border-radius: 5px;
  padding: 13px 15px;
  background: var(--paper-2);
}
.forks .cond {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--accent);
  display: block;
  margin-bottom: 4px;
}
.forks p { margin: 0; font-size: .85rem; color: var(--ink-2); }
.forks p + p { margin-top: .5em; }

/* --- next / prev line links ---------------------------------------------- */

.linknav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  justify-content: space-between;
  border-top: 2px solid var(--ink);
  margin-top: 46px;
  padding-top: 16px;
  font-family: var(--font-mono);
  font-size: .82rem;
}
.linknav a { text-decoration: none; }
.linknav a:hover { text-decoration: underline; }
.linknav .lbl {
  display: block;
  font-size: .64rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

footer.site {
  border-top: 1px solid var(--rule);
  margin-top: 46px;
  padding-top: 16px;
  font-size: .8rem;
  color: var(--ink-3);
}
footer.site p { margin-bottom: .5em; }

/* --- small screens ------------------------------------------------------- */

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .wrap { padding: 0 15px 72px; }
  .rail-inner { padding: 9px 15px 11px; }
  .masthead .meta { margin-left: 0; width: 100%; }
  .pairs { grid-template-columns: 1fr; gap: 2px 0; }
  .pairs dd { margin-bottom: 10px; }
  .stats .v { font-size: 1.15rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}