/* ==========================================================================
   Shamit / S-k404 — datasheet layout
   Type: Archivo (variable width) for text, Martian Mono for labels & data.
   Palette: cool instrument grey + one accent, oscilloscope CH1 yellow.
   ========================================================================== */

:root {
  --bg: #e4e7e9;
  --paper: #eef0f1;
  --ink: #111518;
  --ink-2: #4a5258;
  --rule: #aeb6bc;
  --rule-soft: #cdd3d7;
  --dot: #c3c9cd;
  --accent: #f5c400;
  --accent-ink: #111518;
  --accent-text: #6b5400;
  --focus: #111518;

  --sans: "Archivo", ui-sans-serif, system-ui, sans-serif;
  --mono: "Martian Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --rail-w: 13.5rem;
  --gutter: clamp(1rem, 4vw, 3.5rem);
  --measure: 58rem;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1215;
    --paper: #151a1e;
    --ink: #dde2e5;
    --ink-2: #8f989f;
    --rule: #39434a;
    --rule-soft: #232b31;
    --dot: #1e252a;
    --accent: #f5c400;
    --accent-ink: #0e1215;
    --accent-text: #f5c400;
    --focus: #f5c400;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e1215;
  --paper: #151a1e;
  --ink: #dde2e5;
  --ink-2: #8f989f;
  --rule: #39434a;
  --rule-soft: #232b31;
  --dot: #1e252a;
  --accent: #f5c400;
  --accent-ink: #0e1215;
  --accent-text: #f5c400;
  --focus: #f5c400;
  color-scheme: dark;
}

/* ---------- Base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 1.5rem;
}

body {
  margin: 0;
  background-color: var(--bg);
  background-image: radial-gradient(var(--dot) 1px, transparent 1.3px);
  background-size: 24px 24px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  font-variation-settings: "wdth" 100;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; line-height: 1.1; }
p { margin: 0; }
a { color: inherit; }
code {
  font-family: var(--mono);
  font-size: 0.82em;
  font-variation-settings: "wdth" 87.5;
  padding: 0.05em 0.3em;
  background: var(--rule-soft);
}
strong { font-weight: 650; }

.mono {
  font-family: var(--mono);
  font-variation-settings: "wdth" 87.5;
}

::selection { background: var(--accent); color: var(--accent-ink); }

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

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 10;
  padding: 0.6rem 0.9rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--mono);
  font-size: 0.8rem;
  text-decoration: none;
}
.skip:focus { top: 1rem; }

.arrow {
  display: inline-block;
  margin-left: 0.35em;
  transition: transform 160ms ease;
}
a:hover .arrow, a:focus-visible .arrow { transform: translate(2px, -2px); }

/* ---------- Sheet: rail + main ---------- */

.sheet {
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  min-height: 100vh;
}

/* Pin-out rail */
.rail {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  padding: 2rem 1.25rem 1.5rem 1.5rem;
  border-right: 1px solid var(--rule);
  background: var(--bg);
}

.chip {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}
.chip svg { width: 2.25rem; height: 2.25rem; color: var(--ink); }
.mark-s { stroke: var(--accent-text); }
.chip-id {
  font-family: var(--mono);
  font-variation-settings: "wdth" 87.5;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.pins {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}
.pins a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.3rem 0;
  text-decoration: none;
  font-family: var(--mono);
  font-variation-settings: "wdth" 87.5;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
}
/* The pin lead: a short trace running out of the package edge. */
.pins a::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 50%;
  width: 1.5rem;
  border-top: 1px solid var(--rule);
  transition: border-color 160ms ease;
}
.pin-no {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 1.5rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  font-size: 0.7rem;
  transition: background-color 160ms ease, border-color 160ms ease;
}
.pins a:hover { color: var(--ink); }
.pins a:hover .pin-no { border-color: var(--ink); }
.pins a[aria-current="page"] { color: var(--ink); }
.pins a[aria-current="page"]::before { border-color: var(--ink); border-top-width: 2px; }
.pins a[aria-current="page"] .pin-no {
  background: var(--accent);
  border-color: var(--ink);
  color: var(--accent-ink);
  font-weight: 600;
}

/* Theme toggle */
.theme {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 0;
  border: 0;
  background: none;
  color: var(--ink-2);
  font-family: var(--mono);
  font-variation-settings: "wdth" 87.5;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
}
.theme:hover { color: var(--ink); }
.theme-track {
  position: relative;
  width: 2rem;
  height: 1rem;
  border: 1px solid currentColor;
  flex: none;
}
.theme-knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 0.625rem;
  height: 0.625rem;
  background: var(--ink);
  transition: transform 180ms ease;
}
:root[data-theme="dark"] .theme-knob { transform: translateX(1rem); background: var(--accent); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-knob { transform: translateX(1rem); background: var(--accent); }
}

/* Main column */
main {
  padding: 0 var(--gutter);
  max-width: calc(var(--measure) + 2 * var(--gutter));
  width: 100%;
}

/* ---------- 00 Title block ---------- */

.title {
  padding: 0 0 clamp(3rem, 8vw, 5.5rem);
}

.docline {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--ink);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.name {
  margin-top: clamp(2.5rem, 9vw, 5.5rem);
  font-size: clamp(4.25rem, 15vw, 10.5rem);
  font-weight: 800;
  font-variation-settings: "wdth" 125;
  letter-spacing: -0.035em;
  line-height: 0.82;
  margin-left: -0.05em;
}

.handle {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.9rem;
  margin-top: 1.5rem;
  font-size: clamp(0.78rem, 1.6vw, 0.9rem);
  letter-spacing: 0.02em;
}
.tag {
  padding: 0.2rem 0.55rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}

.lede {
  margin-top: 2rem;
  max-width: 38rem;
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
  line-height: 1.45;
  font-variation-settings: "wdth" 96;
  letter-spacing: -0.005em;
}

.titleblock {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 3rem 0 0;
  border: 1px solid var(--ink);
  background: var(--paper);
}
.titleblock > div {
  padding: 0.7rem 0.85rem 0.8rem;
  border-left: 1px solid var(--rule);
}
.titleblock > div:first-child { border-left: 0; }
.titleblock dt {
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.titleblock dd {
  margin: 0.3rem 0 0;
  font-size: 0.78rem;
  line-height: 1.45;
}

/* ---------- Blocks ---------- */

.block {
  padding: clamp(3rem, 7vw, 5rem) 0;
  border-top: 1px solid var(--ink);
}

.block-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}
.block-no {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--ink);
  transform: translateY(-0.35em);
}
.block-head h2 {
  font-size: clamp(1.9rem, 4.6vw, 3rem);
  font-weight: 750;
  font-variation-settings: "wdth" 112;
  letter-spacing: -0.02em;
}

/* 01 About */
.about {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
}
.prose p + p { margin-top: 1rem; }
.prose { max-width: 36rem; }

.features {
  padding: 1.1rem 1.2rem 1.25rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  align-self: start;
}
.features h3 {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.features ul {
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.95rem;
  line-height: 1.45;
}
.features li {
  position: relative;
  padding-left: 1.1rem;
}
.features li + li { margin-top: 0.6rem; }
.features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--accent);
  outline: 1px solid var(--ink);
}

/* 02 Work: each project is a "part" on the sheet */
.part {
  position: relative;
  padding: 1.75rem 0 2.25rem;
  border-top: 1px dashed var(--rule);
}
.part:first-of-type { border-top: 0; padding-top: 0; }
.part + .part { margin-top: 1.5rem; }

.part-id {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 1rem;
  row-gap: 0.6rem;
  align-items: baseline;
}
.part-id > :not(.refdes) { grid-column: 2; }

.refdes {
  display: inline-grid;
  place-items: center;
  min-width: 2.6rem;
  height: 2.6rem;
  padding: 0 0.4rem;
  background: var(--ink);
  color: var(--bg);
  font-size: 0.85rem;
  font-weight: 600;
  align-self: start;
}
.part-id h3 {
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  font-weight: 700;
  font-variation-settings: "wdth" 108;
  letter-spacing: -0.015em;
  align-self: center;
}
.part-sum { max-width: 40rem; color: var(--ink); }

.ext {
  justify-self: start;
  font-size: 0.72rem;
  color: var(--ink-2);
  text-decoration: underline;
  text-decoration-color: var(--rule);
  text-underline-offset: 0.3em;
  overflow-wrap: anywhere;
}
.ext:hover { color: var(--ink); text-decoration-color: var(--accent); text-decoration-thickness: 2px; }

/* Block diagrams */
.diagram {
  margin: 1.75rem 0 0;
  border: 1px solid var(--rule);
  background: var(--paper);
}
.diagram-scroll {
  overflow-x: auto;
  padding: 1rem 0.75rem 0.5rem;
  scrollbar-width: thin;
}
.diagram svg {
  display: block;
  width: 100%;
  min-width: 560px;
  height: auto;
  font-family: var(--mono);
  font-variation-settings: "wdth" 75;
}
.diagram figcaption {
  padding: 0.5rem 0.85rem;
  border-top: 1px solid var(--rule-soft);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.node rect { fill: var(--bg); stroke: var(--ink); stroke-width: 1.25; }
.node text {
  fill: var(--ink);
  font-size: 10.5px;
  font-weight: 600;
  text-anchor: middle;
}
.node text.sub { fill: var(--ink-2); font-size: 7.5px; font-weight: 400; }
.node.hot rect { fill: var(--accent); }
.node.hot text, .node.hot text.sub { fill: var(--accent-ink); }
.wire path { fill: none; stroke: var(--ink-2); stroke-width: 1.25; }
.wire.signal path {
  stroke: var(--accent);
  stroke-width: 2.25;
  stroke-dasharray: 5 14;
  stroke-dashoffset: 0;
  opacity: 0;
  transition: opacity 300ms ease;
}
.joint { fill: var(--ink-2); }
.note { fill: var(--accent-text); font-size: 9px; text-anchor: middle; letter-spacing: 0.08em; }

.part.is-live .wire.signal path {
  opacity: 1;
  animation: signal 1.4s linear infinite;
}
@keyframes signal { to { stroke-dashoffset: -19; } }

/* Characteristics table */
.specs {
  width: 100%;
  margin-top: 1.75rem;
  border-collapse: collapse;
  font-size: 0.95rem;
  line-height: 1.5;
}
.specs caption {
  text-align: left;
  padding-bottom: 0.5rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.specs tr { border-top: 1px solid var(--rule-soft); }
.specs tr:last-child { border-bottom: 1px solid var(--rule-soft); }
.specs th, .specs td { padding: 0.65rem 0; vertical-align: baseline; text-align: left; }
.specs th {
  width: 9.5rem;
  padding-right: 1.25rem;
  font-family: var(--mono);
  font-variation-settings: "wdth" 87.5;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.68rem;
}
.tags li {
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--rule);
  color: var(--ink-2);
}

.more {
  margin-top: 1rem;
  font-size: 0.78rem;
}
.more a {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.3em;
}

/* 03 Stack: bill of materials */
.bom-wrap { overflow-x: auto; }
.bom {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--ink);
  background: var(--paper);
}
.bom thead th {
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid var(--ink);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: left;
  color: var(--ink-2);
}
.bom td, .bom tbody th {
  padding: 0.85rem 0.9rem;
  border-top: 1px solid var(--rule-soft);
  text-align: left;
  vertical-align: baseline;
}
.bom tbody tr:first-child > * { border-top: 0; }
.bom td.mono { width: 4rem; font-size: 0.75rem; font-weight: 600; color: var(--accent-text); }
.bom tbody th { width: 11rem; font-weight: 650; font-variation-settings: "wdth" 104; }

/* 04 Contact */
.connector {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 1rem;
  row-gap: 1.25rem;
  align-items: center;
}
.connector > :not(.refdes) { grid-column: 2; }
.connector p { font-size: 1.15rem; max-width: 34rem; }

.jack {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1.2rem;
  border: 1.5px solid var(--ink);
  background: var(--paper);
  font-family: var(--mono);
  font-variation-settings: "wdth" 87.5;
  font-size: clamp(0.8rem, 2.2vw, 1rem);
  font-weight: 600;
  text-decoration: none;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform 120ms ease, box-shadow 120ms ease, background-color 120ms ease;
}
.jack svg { width: 1.3rem; height: 1.3rem; fill: currentColor; flex: none; }
.jack:hover { background: var(--accent); color: var(--accent-ink); }
.jack:active { transform: translate(4px, 4px); box-shadow: 0 0 0 var(--ink); }

/* Footer */
.foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
  margin-left: var(--rail-w);
  padding: 1.5rem var(--gutter) 2rem;
  max-width: calc(var(--measure) + 2 * var(--gutter));
  border-top: 1px solid var(--ink);
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-2);
}
/* Footer rule should line up with the main column, not the rail. */
@media (min-width: 821px) {
  .foot { border-top: 0; background: linear-gradient(var(--ink), var(--ink)) no-repeat var(--gutter) 0 / calc(100% - 2 * var(--gutter)) 1px; }
}

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
  .titleblock { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .titleblock > div:nth-child(3) { border-left: 0; }
  .titleblock > div:nth-child(n + 3) { border-top: 1px solid var(--rule); }
  .about { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 820px) {
  :root { --rail-w: 0px; }
  html { scroll-padding-top: 4.5rem; }

  .sheet { grid-template-columns: minmax(0, 1fr); }

  .rail {
    z-index: 5;
    height: auto;
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1rem;
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }
  .chip svg { width: 1.9rem; height: 1.9rem; }
  .chip-id { display: none; }

  .rail nav { flex: 1; min-width: 0; overflow-x: auto; scrollbar-width: none; }
  .rail nav::-webkit-scrollbar { display: none; }
  .pins { grid-auto-flow: column; justify-content: start; gap: 0.9rem; }
  .pins a { gap: 0.4rem; }
  .pins a::before { display: none; }
  .pin-no { width: 1.7rem; height: 1.35rem; font-size: 0.62rem; }
  .pin-name { font-size: 0.66rem; }

  .theme { margin-top: 0; }
  .theme-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

  main { padding: 0 1rem; }
  .docline { margin-top: 1.25rem; }
  .foot { margin-left: 0; padding: 1.25rem 1rem 1.75rem; }
}

@media (max-width: 560px) {
  body { font-size: 1rem; }
  .pin-no { display: none; }
  .pins { gap: 0.25rem; }
  .pins a { padding: 0.3rem 0.45rem; border: 1px solid transparent; }
  .pins a[aria-current="page"] { background: var(--accent); color: var(--accent-ink); border-color: var(--ink); }

  .titleblock { grid-template-columns: minmax(0, 1fr); }
  .titleblock > div { border-left: 0 !important; }
  .titleblock > div + div { border-top: 1px solid var(--rule); }

  .part-id, .connector { grid-template-columns: minmax(0, 1fr); }
  .part-id > :not(.refdes), .connector > :not(.refdes) { grid-column: 1; }
  .refdes { justify-self: start; min-width: 2.2rem; height: 2.2rem; }

  .specs tr { display: block; padding: 0.6rem 0; }
  .specs th, .specs td { display: block; width: auto; padding: 0; }
  .specs th { margin-bottom: 0.25rem; }

  .bom thead { display: none; }
  .bom tr { display: grid; grid-template-columns: 3rem minmax(0, 1fr); border-top: 1px solid var(--rule-soft); }
  .bom tbody tr:first-child { border-top: 0; }
  .bom td, .bom tbody th { border-top: 0; width: auto !important; }
  .bom td.mono { grid-row: span 2; }
  .bom tbody th { padding-bottom: 0.15rem; }
  .bom td:last-child { padding-top: 0; grid-column: 2; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .part.is-live .wire.signal path { opacity: 0; }
}

@media print {
  :root, :root[data-theme="dark"] {
    --bg: #fff; --paper: #fff; --ink: #000; --ink-2: #333; --rule: #999; --rule-soft: #ccc; --accent-text: #000; color-scheme: light;
  }
  body { background: #fff; }
  .rail, .skip, .theme { display: none; }
  .sheet { display: block; }
  .foot { margin-left: 0; }
  .block { break-inside: avoid-page; }
}

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.notfound { margin: 0 auto; padding: 2rem var(--gutter); }
.notfound .more { margin-top: 2.5rem; }

/* ---------- Sub-pages ---------- */

.pagehead { padding: clamp(2.5rem, 7vw, 4.5rem) 0 clamp(2.5rem, 6vw, 4rem); }
.pagehead .lede { margin-top: 1.25rem; }
.pagetitle {
  font-size: clamp(2.6rem, 8vw, 5.5rem);
  font-weight: 800;
  font-variation-settings: "wdth" 118;
  letter-spacing: -0.03em;
  line-height: 0.9;
}
.pagehead .part-id .pagetitle { align-self: center; font-size: clamp(2.1rem, 5.2vw, 3.9rem); font-variation-settings: "wdth" 108; }
.pagehead .part-id .lede { margin-top: 0.5rem; }
.pagehead .refdes { min-width: 3rem; height: 3rem; font-size: 1rem; align-self: center; }

.crumbs {
  display: flex;
  gap: 0.6rem;
  margin-top: 1.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.crumbs a { text-decoration-color: var(--rule); text-underline-offset: 0.3em; }
.crumbs a:hover { color: var(--ink); text-decoration-color: var(--accent); }
.crumbs + .pagehead { padding-top: clamp(1.5rem, 4vw, 2.5rem); }

.part-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  margin-top: 0.75rem;
}
.usage {
  padding: 0.35rem 0.6rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  font-size: 0.72rem;
  overflow-wrap: anywhere;
}

/* Home: roadmap */
.roadmap { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.75rem; }
.roadmap li {
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr);
  gap: 1rem;
  align-items: baseline;
  padding: 0.9rem 0;
  border-top: 1px solid var(--rule-soft);
}
.roadmap li:first-child { border-top: 0; }
.rm-state {
  justify-self: start;
  padding: 0.15rem 0.45rem;
  border: 1px dashed var(--ink-2);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
}

/* Home: sheet index (links to the sub-sites) */
.sheets { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.sheets a {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 12rem) minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: baseline;
  padding: 1.1rem 0.25rem;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  transition: background-color 140ms ease, padding 140ms ease;
}
.sheets a:hover { background: var(--accent); color: var(--accent-ink); padding-left: 0.75rem; }
.sheets a:hover .sheets-no, .sheets a:hover .sheets-desc { color: var(--accent-ink); }
.sheets-no { font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-2); }
.sheets-name { font-size: clamp(1.25rem, 3vw, 1.6rem); font-weight: 700; font-variation-settings: "wdth" 110; letter-spacing: -0.01em; }
.sheets-desc { color: var(--ink-2); font-size: 0.95rem; }

/* Projects index */
.block:has(> .partlist) { border-top: 1px solid var(--ink); }
.partlist { list-style: none; margin: 0; padding: 0; }
.partrow {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 10rem;
  gap: 1.25rem;
  padding: 1.75rem 0;
  border-top: 1px dashed var(--rule);
}
.partrow:first-child { border-top: 0; padding-top: 0; }
.partrow h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  font-variation-settings: "wdth" 108;
  letter-spacing: -0.015em;
}
.partrow h2 a {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 3px;
  text-underline-offset: 0.18em;
}
.partrow h2 a:hover { background: var(--accent); color: var(--accent-ink); }
.partrow-body p { margin-top: 0.5rem; max-width: 36rem; }
.partrow-key {
  display: grid;
  align-content: start;
  justify-items: end;
  text-align: right;
  border-left: 1px solid var(--rule);
  padding-left: 1rem;
}
.key-val { font-size: 2.2rem; font-weight: 800; font-variation-settings: "wdth" 120; line-height: 1; }
.key-lbl { margin-top: 0.4rem; font-size: 0.62rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-2); }

/* Project pages */
.block .part { padding: 0; border: 0; }
.block .part .diagram { margin-top: 0; }
.bench caption {
  caption-side: bottom;
  padding: 0.6rem 0.9rem;
  text-align: left;
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.bench tbody th { width: auto; font-weight: 500; }
.bench td { white-space: nowrap; font-variant-numeric: tabular-nums; }

.pager {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 0 3rem;
  border-top: 1px solid var(--ink);
  font-size: 0.75rem;
}
.pager a { text-decoration-color: var(--accent); text-decoration-thickness: 2px; text-underline-offset: 0.3em; }

@media (max-width: 720px) {
  .sheets a { grid-template-columns: minmax(0, 1fr) auto; row-gap: 0.25rem; }
  .sheets-no { grid-column: 1 / -1; }
  .sheets-desc { grid-column: 1; }
  .sheets .arrow { grid-row: 2; grid-column: 2; }
  .partrow { grid-template-columns: auto minmax(0, 1fr); }
  .partrow-key { grid-column: 2; justify-items: start; text-align: left; border-left: 0; padding-left: 0; border-top: 1px solid var(--rule-soft); padding-top: 0.75rem; }
  .roadmap li { grid-template-columns: minmax(0, 1fr); gap: 0.4rem; }
}
@media (max-width: 560px) {
  .partrow { grid-template-columns: minmax(0, 1fr); }
  .partrow-key { grid-column: 1; }
  .bench thead { display: table-header-group; }
  .bench tr { display: table-row; }
  .bench td, .bench tbody th { display: table-cell; padding: 0.6rem 0.5rem; }
  .bench tbody tr:first-child > * { border-top: 0; }
  .bench td:last-child { padding-top: 0.6rem; }
}

.roadmap-intro { max-width: 38rem; margin-bottom: 1.5rem; color: var(--ink-2); }
.roadmap h3 { font-size: 1.1rem; font-weight: 700; font-variation-settings: "wdth" 106; }
.roadmap li p { margin-top: 0.25rem; max-width: 38rem; }
.roadmap li a { text-decoration-color: var(--accent); text-decoration-thickness: 2px; text-underline-offset: 0.2em; }
.rm-state.is-on { border-style: solid; border-color: var(--ink); background: var(--accent); color: var(--accent-ink); }

/* ---------- Projects: "On the bench" progress pies ---------- */
.pie {
  --p: 0%;
  width: 2.6rem;
  height: 2.6rem;
  margin-bottom: 0.6rem;
  border: 1px solid var(--ink);
  border-radius: 50%;
  background: conic-gradient(var(--accent) 0 var(--p), var(--paper) var(--p) 100%);
  box-shadow: inset 0 0 0 3px var(--paper);
}
.pie.is-queued { --p: 10%; }
.pie.is-planning { --p: 25%; }
.pie.is-building { --p: 50%; }
.pie.is-verifying { --p: 80%; }
.pie.is-done { --p: 100%; }
.partrow-next { margin-top: 0.4rem !important; font-size: 0.72rem; color: var(--ink-2); }
.partrow-next span { margin-right: 0.4rem; padding: 0 0.3rem; border: 1px solid var(--rule); text-transform: uppercase; font-size: 0.6rem; letter-spacing: 0.05em; }
@media (max-width: 720px) {
  .partrow-key:has(.pie) { grid-template-columns: auto minmax(0, 1fr); column-gap: 0.75rem; align-items: center; }
  .partrow-key .pie { grid-row: span 2; width: 2.2rem; height: 2.2rem; margin: 0; }
  .partrow-key:has(.pie) .key-lbl { margin-top: 0.2rem; }
}

/* ---------- Projects: ASCII cat intermission ---------- */
.cat {
  margin: 0;
  padding: 2rem 0 2.5rem;
  border-top: 1px dashed var(--rule);
  display: grid;
  justify-items: center;
  gap: 0.75rem;
}
.cat-stage { display: grid; }
.cat-frame {
  grid-area: 1 / 1;
  margin: 0;
  min-width: 20ch;
  font-size: 0.8rem;
  line-height: 1.2;
  color: var(--ink);
  opacity: 0;
  animation: cat-frame 2.4s steps(1, end) infinite;
}
.cat-frame:nth-child(1) { opacity: 1; }
.cat-frame:nth-child(2) { animation-delay: 0.8s; }
.cat-frame:nth-child(3) { animation-delay: 1.6s; }
@keyframes cat-frame { 0% { opacity: 1; } 33.34% { opacity: 0; } 100% { opacity: 0; } }
.cat-yarn { color: var(--accent-text); font-weight: 700; }
.cat figcaption { font-size: 0.65rem; letter-spacing: 0.04em; color: var(--ink-2); }
.cat-frame { text-transform: none; letter-spacing: 0; }
/* Footer cats: small, left-aligned, on their own line above the footer text. */
.cat-mini { flex-basis: 100%; padding: 0; border: 0; justify-items: start; }
.cat-mini .cat-frame { min-width: 0; font-size: 0.66rem; line-height: 1.15; color: var(--ink-2); }
.notfound .cat { margin-top: 2rem; justify-items: start; }