/* mooncrypt — the site is a machine.
   One typeface, set like a stamped plate. Every rule is a hairline, every
   label is engraved, and the only light surface is the paper the machine
   prints on. Dark is the housing; light is the enamel panel. */

/* ── tokens ─────────────────────────────────────────────────────────────── */

:root {
  color-scheme: light;

  --mono: "Azeret Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* enamel panel */
  --ground: #d8d6cd;
  --ground-2: #cfcdc3;
  --plate: #e8e5db;
  --plate-2: #efede4;
  --sunk: #c9c6bb;
  --line: #b9b6a9;
  --line-2: #979487;
  --ink: #14130d;
  --ink-2: #33302a;
  --ink-3: #5f5a4b;
  --brass: #7b5c14;
  --brass-2: #a5822c;
  --lamp: #9c440f;
  --red: #8b2b16;
  --paper: #fcf9ef;
  --paper-ink: #191610;
  --paper-rule: #d8cfb4;

  --shadow: 0 1px 0 color-mix(in oklab, var(--ground) 40%, transparent);
  --bevel: inset 0 1px 0 color-mix(in oklab, #fff 55%, transparent);

  --head-h: 60px;
  --wrap: 1240px;
  --gutter: clamp(18px, 4vw, 44px);
}

[data-theme="dark"] {
  color-scheme: dark;

  /* bakelite housing */
  --ground: #0b0b0c;
  --ground-2: #101011;
  --plate: #161617;
  --plate-2: #1c1c1e;
  --sunk: #08080a;
  --line: #2a2a2d;
  --line-2: #3c3c41;
  --ink: #ece7da;
  --ink-2: #c4bdad;
  --ink-3: #8d8779;
  --brass: #c9a049;
  --brass-2: #8d6f2b;
  --lamp: #ffb648;
  --red: #d4634a;
  --paper: #ece6d6;
  --paper-ink: #1b1811;
  --paper-rule: #cdc4aa;

  --shadow: 0 1px 0 color-mix(in oklab, #000 60%, transparent);
  --bevel: inset 0 1px 0 color-mix(in oklab, #fff 7%, transparent);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --ground: #0b0b0c;
    --ground-2: #101011;
    --plate: #161617;
    --plate-2: #1c1c1e;
    --sunk: #08080a;
    --line: #2a2a2d;
    --line-2: #3c3c41;
    --ink: #e9e4d7;
    --ink-2: #b3ac9c;
    --ink-3: #79746a;
    --brass: #c9a049;
    --brass-2: #8d6f2b;
    --lamp: #ffb648;
    --red: #d4634a;
    --paper: #ece6d6;
    --paper-ink: #1b1811;
    --paper-rule: #cdc4aa;
    --shadow: 0 1px 0 color-mix(in oklab, #000 60%, transparent);
    --bevel: inset 0 1px 0 color-mix(in oklab, #fff 7%, transparent);
  }
}

/* ── base ───────────────────────────────────────────────────────────────── */

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

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

@supports not selector(::-webkit-scrollbar) {
  html {
    scrollbar-color: var(--line-2) var(--ground);
    scrollbar-width: thin;
  }
}

::-webkit-scrollbar {
  width: 11px;
  height: 11px;
}

::-webkit-scrollbar-track {
  background: var(--ground-2);
  border-left: 1px solid var(--line);
}

::-webkit-scrollbar-thumb {
  background: var(--line-2);
  border: 3px solid var(--ground-2);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--brass);
}

/* At rest the page bar is not drawn and gives up none of its width: the strip
   stays where it is in the colour of the page, so nothing shifts when it
   appears. */
html:not(.scrolling)::-webkit-scrollbar-track,
html:not(.scrolling)::-webkit-scrollbar-corner {
  background: transparent;
  border-left-color: transparent;
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.72;
  font-variant-ligatures: none;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

@supports (font-variant-ligatures: no-contextual) {
  html,
  button,
  input,
  textarea,
  select {
    font-variant-ligatures: no-contextual;
  }
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

img,
svg {
  display: block;
  max-width: 100%;
}

/* Selection is a wash of brass, not a block of it. A solid block inverts the
   paragraph to enamel-on-brass, which reads as a different page printed on
   different stock; the point of highlighting is that the sentence is still the
   sentence you are reading. */
::selection {
  background: color-mix(in oklab, var(--brass) 26%, transparent);
  color: inherit;
}

/* The plates, the tape, the rotor and the navigation are surfaces of a machine,
   not text on a page. A drag that starts on one of them used to paint a
   selection block across the brass, which breaks the object entirely: a typebar
   does not highlight. Prose, listings, printed output and signatures stay
   selectable, because those are what a reader actually copies. */
.head,
.nav,
.foot,
.hero,
.rotor-fig,
.device,
.tape-band,
.numbers,
.parts,
.part,
.refusals,
.refusal,
.rail,
.listing-bar,
.doc-head,
.bench,
.dial,
.dial-row,
.hexdump,
.grid-bits,
.bits-legend,
.code-pin,
.otp-meta,
.verdict-line,
.sec-head,
.tag,
.kind {
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  cursor: default;
}

/* Inside those surfaces two things stay exempt. A carriage you cannot select or
   type into is not a carriage, so the text fields take selection back; and the
   controls keep a pointer, because a link is still a link even when its label
   cannot be highlighted. */
.carriage,
input,
textarea,
select {
  -webkit-user-select: auto;
  user-select: auto;
  cursor: auto;
}

.head a,
.nav a,
.part a,
.rail a,
.btn,
.field {
  cursor: pointer;
}

/* A flash of grey under the finger is the mobile equivalent of the selection
   block: it makes the object feel like a document. */
a,
button {
  -webkit-tap-highlight-color: transparent;
}

/* Nor can the drawn parts be picked up and carried like a picture. */
.rotor-fig,
.device,
.tape-band {
  -webkit-user-drag: none;
}

:focus-visible {
  outline: 1px solid var(--brass);
  outline-offset: 2px;
}

/* ── type ───────────────────────────────────────────────────────────────── */

.stamp {
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brass);
}

.stamp-quiet {
  color: var(--ink-3);
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.12;
}

.display {
  font-size: clamp(2.1rem, 5.4vw, 3.9rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.02;
  text-wrap: balance;
}

h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
}

h3 {
  font-size: 1.02rem;
}

p {
  margin: 0;
  text-wrap: pretty;
}

.lede {
  font-size: 1.02rem;
  color: var(--ink-2);
  max-width: 58ch;
}

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

.mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

/* ── layout ─────────────────────────────────────────────────────────────── */

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.band {
  border-top: 1px solid var(--line);
  padding-block: clamp(38px, 6vw, 76px);
}

.band-tight {
  padding-block: clamp(26px, 4vw, 44px);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
}

@media (width >= 900px) {
  .split-75 {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .split-64 {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
    align-items: start;
  }
}

.sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(20px, 3vw, 32px);
}

.sec-head .no {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--brass);
}

.sec-head .rest {
  margin-left: auto;
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ── header ─────────────────────────────────────────────────────────────── */

.head {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--head-h);
  background: color-mix(in oklab, var(--ground) 92%, transparent);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--line);
}

.head > .wrap {
  display: flex;
  align-items: center;
  gap: 18px;
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  white-space: nowrap;
}

.brand svg {
  width: 17px;
  height: 17px;
  color: var(--brass);
}

.brand:hover svg {
  animation: spin 8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.head-rule {
  flex: 1;
  height: 1px;
  background: var(--line);
  min-width: 12px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav a,
.nav button {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 9px;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-2);
  border: 1px solid transparent;
}

.nav a:hover,
.nav button:hover {
  color: var(--ink);
  border-color: var(--line);
  background: var(--plate);
}

.nav a[aria-current="page"] {
  color: var(--brass);
  border-color: var(--line);
  background: var(--plate);
  box-shadow: var(--bevel);
}

.nav svg {
  width: 13px;
  height: 13px;
}

.icon-link {
  padding: 6px;
}

.icon-link svg {
  width: 15px;
  height: 15px;
}

/* the lamp switch */
.lamp-sw {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  background: var(--plate);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.lamp-sw i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--line-2);
  box-shadow: inset 0 0 0 1px color-mix(in oklab, #000 30%, transparent);
}

[data-theme="dark"] .lamp-sw i,
:root:not([data-theme="light"]) .lamp-sw i {
  background: var(--lamp);
  box-shadow:
    0 0 6px color-mix(in oklab, var(--lamp) 70%, transparent),
    inset 0 0 0 1px color-mix(in oklab, #000 40%, transparent);
}

@media (width <= 720px) {
  .head .wrap {
    gap: 8px;
  }

  .brand {
    font-size: 0.7rem;
    letter-spacing: 0.14em;
  }

  .nav a,
  .nav button {
    padding: 5px 6px;
    font-size: 0.6rem;
    letter-spacing: 0.07em;
  }

  .lamp-sw {
    padding: 5px;
  }

  .lamp-sw .word {
    display: none;
  }

  .head-rule {
    display: none;
  }
}

/* ── plates, screws, drafting marks ─────────────────────────────────────── */

.plate {
  position: relative;
  background: var(--plate);
  border: 1px solid var(--line);
  box-shadow: var(--bevel);
}

.plate-sunk {
  background: var(--sunk);
  box-shadow: inset 0 2px 6px color-mix(in oklab, #000 22%, transparent);
  border-color: var(--line);
}

.ticked::before,
.ticked::after {
  content: "";
  position: absolute;
  width: 9px;
  height: 9px;
  border: 1px solid var(--brass-2);
  opacity: 0.55;
  pointer-events: none;
}

.ticked::before {
  top: 6px;
  left: 6px;
  border-right: 0;
  border-bottom: 0;
}

.ticked::after {
  right: 6px;
  bottom: 6px;
  border-left: 0;
  border-top: 0;
}

.screw {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background:
    linear-gradient(
      168deg,
      color-mix(in oklab, var(--line-2) 70%, #fff 30%),
      var(--line-2) 60%
    );
  box-shadow: inset 0 0 0 1px color-mix(in oklab, #000 35%, transparent);
  pointer-events: none;
}

.screw::after {
  content: "";
  position: absolute;
  inset: 4px 1px;
  border-top: 1px solid color-mix(in oklab, #000 55%, transparent);
  transform: rotate(var(--turn, 24deg));
}

/* ── hero ───────────────────────────────────────────────────────────────── */

.hero {
  position: relative;
  padding-block: clamp(34px, 5vw, 68px) clamp(30px, 4vw, 52px);
  border-top: 1px solid var(--line);
  background-image:
    linear-gradient(
      to right,
      color-mix(in oklab, var(--line) 34%, transparent) 1px,
      transparent 1px
    ),
    linear-gradient(
      to bottom,
      color-mix(in oklab, var(--line) 34%, transparent) 1px,
      transparent 1px
    );
  background-size: 68px 68px;
  background-position: -1px -1px;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    120% 90% at 78% 30%,
    transparent 30%,
    var(--ground) 78%
  );
  pointer-events: none;
}

.hero > .wrap {
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 40px);
}

@media (width >= 940px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.68fr);
    gap: clamp(24px, 3vw, 48px);
    align-items: center;
  }
}

.hero h1 {
  margin-block: 18px 20px;
}

.hero h1 em {
  font-style: normal;
  color: var(--brass);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink);
  background: linear-gradient(var(--plate-2), var(--plate));
  border: 1px solid var(--line-2);
  box-shadow:
    0 1px 0 var(--line-2),
    var(--bevel);
  transition: transform 90ms ease;
}

.btn:hover {
  border-color: var(--brass);
  color: var(--ink);
}

.btn:active {
  transform: translateY(1px);
  box-shadow: inset 0 2px 5px color-mix(in oklab, #000 30%, transparent);
}

.btn-brass {
  color: color-mix(in oklab, var(--brass) 80%, var(--ink));
  border-color: color-mix(in oklab, var(--brass) 55%, var(--line-2));
}

.btn svg {
  width: 12px;
  height: 12px;
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-top: 30px;
  border-top: 1px solid var(--line);
}

.hero-facts div {
  padding: 10px 18px 0 0;
  margin-right: 18px;
  border-right: 1px solid var(--line);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.hero-facts div:last-child {
  border-right: 0;
}

/* the rotor drawing */

.rotor-box {
  position: relative;
  aspect-ratio: 1;
  max-width: 462px;
  margin-inline: auto;
  width: 100%;
  /* the dial takes the wheel, so it is handled like a part, not a picture */
  border-radius: 50%;
  user-select: none;
  -webkit-user-select: none;
  touch-action: pan-y;
}

.rotor-box:focus-visible {
  outline-offset: 7px;
}

/* the letter standing under the index */
.rotor-alpha .at {
  fill: var(--brass);
  font-weight: 700;
}

.rotor-box svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.rotor-fig {
  margin: 0;
  display: grid;
  gap: 13px;
}

.rotor-caption {
  display: block;
  padding-top: 9px;
  border-top: 1px solid var(--line);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  line-height: 1.6;
}

.rotor-caption > span:first-child {
  margin-right: 5px;
  color: var(--brass);
  white-space: nowrap;
}

/* The index reads on its own line: turning the dial must never reflow the
   sentence above it. */
.rotor-caption .rotor-index {
  display: block;
  white-space: nowrap;
}

.rotor-caption b {
  color: var(--brass);
  font-weight: 600;
}

@media (width <= 940px) {
  .rotor-box {
    max-width: 320px;
  }
}

/* ── the tape ───────────────────────────────────────────────────────────── */

.tape-band {
  border-top: 1px solid var(--line);
  background: var(--ground-2);
  padding-block: clamp(30px, 4.4vw, 54px);
}

.device {
  position: relative;
  padding: clamp(16px, 2.4vw, 26px);
  background: var(--plate);
  border: 1px solid var(--line);
  box-shadow:
    var(--bevel),
    0 18px 40px -30px color-mix(in oklab, #000 80%, transparent);
}

.device-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.device-bar .lamp {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--line-2);
  transition: background 160ms ease, box-shadow 160ms ease;
}

.device-bar .lamp.live {
  background: var(--lamp);
  box-shadow: 0 0 9px color-mix(in oklab, var(--lamp) 80%, transparent);
}

.device-bar .name {
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.device-bar .right {
  margin-left: auto;
  display: flex;
  gap: 4px;
}

.rotor-pick {
  display: flex;
  gap: 0;
  border: 1px solid var(--line);
  background: var(--sunk);
}

.rotor-pick button {
  padding: 4px 9px;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  border-right: 1px solid var(--line);
}

.rotor-pick button:last-child {
  border-right: 0;
}

.rotor-pick button[aria-pressed="true"] {
  color: var(--ground);
  background: var(--brass);
}

.tape-screen {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

@media (width >= 860px) {
  .tape-screen {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 18px;
    align-items: start;
  }
}

.carriage {
  position: relative;
  background: var(--sunk);
  border: 1px solid var(--line);
  padding: 12px;
  box-shadow: inset 0 2px 7px color-mix(in oklab, #000 20%, transparent);
}

.carriage label {
  display: block;
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 8px;
}

.carriage input {
  width: 100%;
  padding: 8px 10px;
  font-family: var(--mono);
  font-size: 0.86rem;
  color: var(--ink);
  background: var(--paper);
  color: var(--paper-ink);
  border: 1px solid var(--line-2);
  border-radius: 0;
}

.carriage input:focus {
  outline: none;
  border-color: var(--brass);
  box-shadow: 0 0 0 1px color-mix(in oklab, var(--brass) 45%, transparent);
}

.carriage .out {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 9px;
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.tape {
  position: relative;
  background: var(--paper);
  color: var(--paper-ink);
  padding: 20px 0;
  border: 1px solid color-mix(in oklab, var(--paper-ink) 18%, transparent);
  overflow: hidden;
  min-height: 176px;
}

.tape::before,
.tape::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 12px;
  background-image: radial-gradient(
    circle at 7px 6px,
    color-mix(in oklab, var(--paper-ink) 26%, transparent) 0 2.6px,
    transparent 2.8px
  );
  background-size: 16px 12px;
  pointer-events: none;
}

.tape::before {
  top: 0;
}

.tape::after {
  bottom: 0;
}

.tape-rows {
  padding: 4px 18px;
  display: grid;
  gap: 0;
}

.tape-row {
  display: grid;
  grid-template-columns: 4.2em minmax(0, 1fr);
  gap: 12px;
  padding: 5px 0;
  border-bottom: 1px dotted
    color-mix(in oklab, var(--paper-ink) 20%, transparent);
  font-size: 0.72rem;
  line-height: 1.55;
  animation: feed 260ms ease both;
}

@keyframes feed {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
}

.tape-row:last-child {
  border-bottom: 0;
}

.tape-row .when {
  color: color-mix(in oklab, var(--paper-ink) 55%, transparent);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  padding-top: 2px;
}

.tape-row .cell {
  display: grid;
  gap: 1px;
  min-width: 0;
}

.tape-row .say {
  font-size: 0.66rem;
  color: color-mix(in oklab, var(--paper-ink) 58%, transparent);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tape-row .digest {
  word-break: break-all;
  letter-spacing: 0.04em;
}

.tape-row .digest b {
  font-weight: 600;
  color: var(--lamp);
  background: color-mix(in oklab, var(--lamp) 12%, transparent);
}

.tape-row .verdict {
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: color-mix(in oklab, var(--paper-ink) 60%, transparent);
}

@media (prefers-reduced-motion: reduce) {
  .tape-row {
    animation: none;
  }

  .brand:hover svg {
    animation: none;
  }
}

/* ── the numbers ────────────────────────────────────────────────────────── */

.numbers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

@media (width >= 780px) {
  .numbers {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.numbers div {
  padding: 20px 18px 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ground);
}

.numbers b {
  display: block;
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
}

.numbers span {
  display: block;
  margin-top: 9px;
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ── the parts index ────────────────────────────────────────────────────── */

.parts {
  border-top: 1px solid var(--line);
}

.part {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px 20px;
  padding: 15px 2px 15px 14px;
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: background 140ms ease, padding-left 140ms ease;
}

@media (width >= 760px) {
  .part {
    grid-template-columns: 13.5em minmax(0, 1fr);
    align-items: baseline;
  }
}

.part::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--brass);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 180ms ease;
}

.part:hover {
  background: var(--ground-2);
  padding-left: 18px;
}

.part:hover::before {
  transform: scaleY(1);
}

.part .fam {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
}

.part .pk {
  font-size: 0.74rem;
  color: var(--ink-2);
  line-height: 1.9;
  word-spacing: 0.2em;
}

.part .pk i {
  font-style: normal;
  color: var(--line-2);
  padding-inline: 3px;
}

/* ── refusals ───────────────────────────────────────────────────────────── */

.refusals {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (width >= 820px) {
  .refusals {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.refusal {
  background: var(--ground);
  padding: 22px 20px 24px;
  display: grid;
  gap: 10px;
  align-content: start;
}

.refusal .tag {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--red);
}

.refusal h3 {
  font-size: 0.95rem;
  letter-spacing: 0;
}

.refusal p {
  font-size: 0.82rem;
  color: var(--ink-2);
  line-height: 1.66;
}

.refusal code {
  font-size: 0.74rem;
  color: var(--ink-3);
  white-space: pre;
  overflow-x: auto;
  display: block;
  padding-top: 4px;
  border-top: 1px dotted var(--line);
}

/* ── footer ─────────────────────────────────────────────────────────────── */

.foot {
  border-top: 1px solid var(--line);
  background: var(--ground-2);
  padding-block: 30px 34px;
}

.foot .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  align-items: baseline;
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.foot a:hover {
  color: var(--brass);
}

.foot .spacer {
  margin-left: auto;
}

/* ── documents: guide, showcase, api ────────────────────────────────────── */

.doc-head {
  border-top: 1px solid var(--line);
  padding-block: clamp(26px, 4vw, 44px) clamp(20px, 3vw, 30px);
  background-image:
    linear-gradient(
      to right,
      color-mix(in oklab, var(--line) 26%, transparent) 1px,
      transparent 1px
    ),
    linear-gradient(
      to bottom,
      color-mix(in oklab, var(--line) 26%, transparent) 1px,
      transparent 1px
    );
  background-size: 68px 68px;
}

.doc-head h1 {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  margin-block: 14px 12px;
}

.doc-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 44px);
  padding-block: clamp(26px, 4vw, 44px) clamp(50px, 7vw, 90px);
}

@media (width >= 960px) {
  .doc-shell {
    grid-template-columns: 15.5em minmax(0, 1fr);
    align-items: start;
  }
}

.rail {
  font-size: 0.72rem;
}

@media (width >= 960px) {
  .rail {
    position: sticky;
    top: calc(var(--head-h) + 22px);
    max-height: calc(100vh - var(--head-h) - 44px);
    overflow-y: auto;
    padding-right: 6px;
  }
}

.rail .rail-title {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 10px;
}

.rail ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
}

.rail a {
  display: flex;
  gap: 9px;
  padding: 6px 8px 6px 10px;
  color: var(--ink-3);
  border-left: 2px solid transparent;
}

.rail a:hover {
  color: var(--ink);
  background: var(--ground-2);
}

.rail a[aria-current="true"] {
  color: var(--ink);
  background: var(--ground-2);
  border-left-color: var(--brass);
}

.rail a .n {
  color: var(--brass);
  font-size: 0.62rem;
  padding-top: 2px;
}

/* prose */

.prose {
  max-width: 74ch;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.prose h2 {
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 1.28rem;
}

.prose h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.prose h3 {
  margin-top: 18px;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.prose p {
  color: var(--ink-2);
}

/* A specification link is one unbreakable token. Without this, a single long
   URL in a package note scrolls the whole page sideways on a phone. */
.prose p,
.prose li,
.prose dd,
.pkg-note,
.pkg-ref {
  overflow-wrap: anywhere;
}

.prose ul,
.prose ol {
  margin: 0;
  padding-left: 1.2em;
  color: var(--ink-2);
}

.prose li {
  margin-block: 5px;
}

.prose li::marker {
  color: var(--brass);
}

.prose a:not(.btn) {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: color-mix(in oklab, var(--brass) 60%, transparent);
  text-underline-offset: 3px;
}

.prose a:not(.btn):hover {
  text-decoration-color: var(--brass);
  color: var(--ink);
}

.prose code,
.cell code {
  font-size: 0.85em;
  padding: 1px 4px;
  background: var(--ground-2);
  border: 1px solid var(--line);
  color: var(--ink);
}

/* code listings */

.listing {
  min-width: 0;
  margin: 4px 0;
  border: 1px solid var(--line);
  background: var(--sunk);
  box-shadow: inset 0 2px 8px color-mix(in oklab, #000 18%, transparent);
}

.listing-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 11px;
  border-bottom: 1px solid var(--line);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  background: var(--plate);
}

.listing-bar .spacer {
  margin-left: auto;
}

.listing pre {
  margin: 0;
  padding: 13px 0;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.79rem;
  line-height: 1.75;
  color: var(--ink);
  tab-size: 2;
}

.listing pre code {
  display: block;
  min-width: max-content;
  padding-inline: 13px;
  white-space: pre;
}

.tok-c {
  color: var(--ink-3);
}

.tok-k {
  color: var(--brass);
}

.tok-s {
  color: color-mix(in oklab, var(--ink) 70%, var(--brass) 30%);
}

.tok-n {
  color: var(--ink-2);
}

.out {
  margin: 0;
  padding: 10px 13px;
  border-top: 1px dashed var(--line-2);
  font-size: 0.74rem;
  line-height: 1.7;
  color: var(--ink-3);
  white-space: pre;
  overflow-x: auto;
  background: var(--ground);
}

.out b {
  color: var(--ink-2);
  font-weight: 500;
}

.note {
  border: 1px solid var(--line);
  border-left: 2px solid var(--brass);
  background: var(--plate);
  padding: 13px 16px;
  font-size: 0.82rem;
  color: var(--ink-2);
  display: grid;
  gap: 6px;
}

.note .stamp {
  font-size: 0.6rem;
}

/* ── api reference ──────────────────────────────────────────────────────── */

.api-index {
  columns: 2;
  column-gap: 22px;
  font-size: 0.72rem;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

@media (width <= 620px) {
  .api-index {
    columns: 1;
  }
}

.api-index a {
  display: block;
  padding: 3px 0;
  color: var(--ink-3);
  break-inside: avoid;
}

.api-index a:hover {
  color: var(--brass);
}

.pkg {
  padding-top: 26px;
}

.pkg-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-2);
  margin-bottom: 6px;
}

.pkg-head h2 {
  font-size: 1.06rem;
  letter-spacing: 0;
}

.pkg-head .path {
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  word-break: break-all;
}

.pkg-head .no {
  font-size: 0.6rem;
  color: var(--brass);
  letter-spacing: 0.14em;
}

.prose.api {
  max-width: none;
}

.pkg-ref {
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  padding: 9px 0 0;
  max-width: 74ch;
}

.pkg-note {
  font-size: 0.82rem;
  color: var(--ink-2);
  padding: 8px 0 2px;
  max-width: 74ch;
}

.item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px 18px;
  padding: 13px 0 14px;
  border-bottom: 1px dotted var(--line);
}

@media (width >= 900px) {
  .item {
    grid-template-columns: 15em minmax(0, 1fr);
  }
}

.item .name {
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  padding-top: 2px;
  word-break: break-word;
}

.item .name .kind {
  display: inline-block;
  font-size: 0.56rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--brass);
  border: 1px solid color-mix(in oklab, var(--brass) 40%, var(--line));
  padding: 0 3px;
  margin-right: 6px;
  vertical-align: 1px;
}

.item .body {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.item .sig {
  font-size: 0.75rem;
  color: var(--ink);
  white-space: pre;
  overflow-x: auto;
  line-height: 1.6;
  padding-bottom: 2px;
}

@supports not selector(::-webkit-scrollbar) {
  .item .sig {
    scrollbar-width: thin;
  }
}

.item .sig .ret {
  color: var(--ink-3);
}

.item p {
  font-size: 0.79rem;
  color: var(--ink-2);
  line-height: 1.68;
  max-width: 72ch;
}

/* ── showcase ───────────────────────────────────────────────────────────── */

.bench {
  border: 1px solid var(--line);
  background: var(--plate);
  padding: clamp(14px, 2vw, 22px);
  box-shadow: var(--bevel);
  display: grid;
  gap: 16px;
}

.bench-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.bench-top .spacer {
  margin-left: auto;
}

.grid-bits {
  display: grid;
  grid-template-columns: repeat(32, minmax(0, 1fr));
  gap: 1px;
}

.grid-bits i {
  display: block;
  aspect-ratio: 1;
  background: var(--line);
  opacity: 0.4;
}

.grid-bits i.on {
  background: var(--brass);
  opacity: 1;
}

.bits-legend {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.bits-legend b {
  color: var(--brass);
  font-weight: 500;
}

.dial-row {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  align-items: center;
}

.dial {
  width: 116px;
  height: 116px;
  flex: 0 0 auto;
}

.dial circle.track {
  fill: none;
  stroke: var(--line);
  stroke-width: 3;
}

.dial circle.arc {
  fill: none;
  stroke: var(--brass);
  stroke-width: 3;
  stroke-linecap: butt;
  transform: rotate(-90deg);
  transform-origin: center;
}

.pin {
  font-size: clamp(1.4rem, 4vw, 2rem);
  letter-spacing: 0.22em;
  font-weight: 700;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

input[type="text"],
input[type="range"] {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--paper-ink);
  background: var(--paper);
  border: 1px solid var(--line-2);
  padding: 7px 9px;
  border-radius: 0;
}

input[type="range"] {
  padding: 0;
  accent-color: var(--brass);
  background: none;
  border: 0;
  width: 150px;
}

.field {
  display: grid;
  gap: 6px;
}

.field span {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.hexdump {
  font-size: 0.72rem;
  line-height: 1.9;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--ink-2);
  padding: 10px 12px;
  background: var(--sunk);
  border: 1px solid var(--line);
}

.hexdump .hot {
  color: var(--lamp);
  font-weight: 600;
}

.verdict-line {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.verdict-line.ok {
  color: var(--brass);
}

.verdict-line.no {
  color: var(--red);
}

/* ── small screens ──────────────────────────────────────────────────────── */

@media (width <= 620px) {
  body {
    font-size: 14px;
  }

  .head {
    --head-h: 54px;
  }

  .hero-facts div {
    border-right: 0;
    margin-right: 0;
    padding-right: 14px;
  }

  .tape-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .tape-row .when {
    padding-top: 0;
  }
}

@media (width < 960px) {
  .rail {
    padding-block: 12px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .rail ol {
    display: flex;
    gap: 2px;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  @supports not selector(::-webkit-scrollbar) {
    .rail ol {
      scrollbar-width: thin;
    }
  }

  .rail a {
    white-space: nowrap;
    border-left: 0;
    border-bottom: 2px solid transparent;
    padding: 5px 10px;
  }

  .rail a[aria-current="true"] {
    border-left: 0;
    border-bottom-color: var(--brass);
  }
}

@media print {
  .head,
  .foot,
  .rail {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }
}

/* ── showcase extras ───────────────────────────────────────────────────── */

.digests {
  display: grid;
  gap: 7px;
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: var(--ink-3);
}

.digests div {
  display: grid;
  gap: 1px;
}

.digests code {
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--ink-2);
  word-break: break-all;
  line-height: 1.5;
}

.bench h3 {
  font-size: 0.92rem;
  letter-spacing: 0;
}

.bench .say {
  font-size: 0.8rem;
  color: var(--ink-2);
  max-width: 70ch;
}

.dial text {
  font-family: var(--mono);
  fill: var(--ink-3);
  font-size: 8px;
  letter-spacing: 1.4px;
}

.code-pin {
  font-size: clamp(2rem, 5vw, 2.7rem);
  letter-spacing: 0.22em;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.1;
}

.otp-meta {
  display: flex;
  gap: 14px;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.otp-meta b {
  color: var(--brass);
  font-weight: 500;
}

.prose.showcase {
  max-width: 908px;
}

@media (width <= 620px) {
  .grid-bits {
    gap: 1px;
  }
}

/* The page scroll bar shows while the page moves or under the pointer and
   hides a moment after; it keeps its place, so nothing shifts. */
@supports selector(::-webkit-scrollbar) {
  html:not(.scrolling)::-webkit-scrollbar-thumb { background: transparent; border-color: transparent; box-shadow: none; }
}
@supports not selector(::-webkit-scrollbar) {
  html:not(.scrolling) { scrollbar-color: transparent transparent; }
}