/* ===========================================================================
 * tour.css — Neotko · interactive tour
 *
 * Design brief: "studio / technical paper". Near-white paper, editorial serif
 * headings, everything set on a quiet achromatic chrome.
 *
 * The one discipline that makes this work: SATURATED COLOUR IS RESERVED.
 * Teal appears in links, the active nav item and demo affordances — nowhere
 * else. Every other coloured pixel on the page is a filament swatch, a demo
 * output, or a screenshot of the app. On a site about colour, that restraint
 * is the design.
 *
 * No external requests. No web fonts. Works from file://.
 * =========================================================================== */

/* ------------------------------------------------------------------ tokens */

:root {
  color-scheme: light;

  --paper:      #fbfaf8;
  --paper-2:    #f4f2ee;
  --surface:    #ffffff;
  --surface-2:  #f7f6f3;
  --ink:        #15181d;
  --ink-soft:   #5b6270;
  --ink-faint:  #8b919c;
  --rule:       #e5e2dc;
  --rule-firm:  #d3cfc7;

  --accent:     #0d7d72;
  --accent-ink: #ffffff;
  --accent-wash:#e8f3f1;
  --warn:       #a8620a;
  --warn-wash:  #fdf4e7;
  --alert:      #bc2b53;
  --alert-wash: #fdeef2;
  --good:       #2f7d4f;
  --good-wash:  #ecf6ef;

  --shadow-sm: 0 1px 2px rgba(20,24,29,.05), 0 1px 1px rgba(20,24,29,.04);
  --shadow-md: 0 2px 4px rgba(20,24,29,.04), 0 8px 24px rgba(20,24,29,.07);
  --shadow-lg: 0 4px 8px rgba(20,24,29,.05), 0 20px 48px rgba(20,24,29,.10);

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

  --measure: 43rem;      /* the article column */
  --shell:   78rem;      /* the outer shell */
  --rail:    15rem;      /* the TOC rail */
  --radius:  10px;
  --radius-sm: 6px;
}

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

  --paper:      #101214;
  --paper-2:    #15181b;
  --surface:    #171b1e;
  --surface-2:  #1d2226;
  --ink:        #e9e7e2;
  --ink-soft:   #9aa2ad;
  --ink-faint:  #6f7883;
  --rule:       #2a2f35;
  --rule-firm:  #3a4149;

  --accent:     #2dd4bf;
  --accent-ink: #06201d;
  --accent-wash:#132a29;
  --warn:       #e0a458;
  --warn-wash:  #2a2114;
  --alert:      #f47a9b;
  --alert-wash: #2c161d;
  --good:       #6ec48f;
  --good-wash:  #14251b;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow-md: 0 2px 4px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  --shadow-lg: 0 4px 8px rgba(0,0,0,.3), 0 20px 48px rgba(0,0,0,.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --paper:#101214; --paper-2:#15181b; --surface:#171b1e; --surface-2:#1d2226;
    --ink:#e9e7e2; --ink-soft:#9aa2ad; --ink-faint:#6f7883;
    --rule:#2a2f35; --rule-firm:#3a4149;
    --accent:#2dd4bf; --accent-ink:#06201d; --accent-wash:#132a29;
    --warn:#e0a458; --warn-wash:#2a2114;
    --alert:#f47a9b; --alert-wash:#2c161d;
    --good:#6ec48f; --good-wash:#14251b;
    --shadow-sm:0 1px 2px rgba(0,0,0,.4);
    --shadow-md:0 2px 4px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
    --shadow-lg:0 4px 8px rgba(0,0,0,.3), 0 20px 48px rgba(0,0,0,.45);
  }
}

/* ------------------------------------------------------------------- reset */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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: 2px;
  border-radius: 3px;
}

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

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -.011em;
  margin: 0;
  text-wrap: balance;
}

h1 { font-size: clamp(2.1rem, 1.4rem + 2.6vw, 3.1rem); letter-spacing: -.022em; }
h2 { font-size: clamp(1.5rem, 1.2rem + 1.1vw, 1.95rem); margin: 3.2rem 0 .85rem; }
h3 { font-size: 1.24rem; margin: 2.2rem 0 .6rem; }
h4 { font-size: 1.04rem; margin: 1.6rem 0 .4rem; font-family: var(--sans); font-weight: 650; }

h2 + h3 { margin-top: 1.4rem; }

p  { margin: 0 0 1.05rem; }
ul, ol { margin: 0 0 1.2rem; padding-left: 1.35rem; }
li { margin: .3rem 0; }
li > ul, li > ol { margin: .3rem 0 .35rem; }

strong, b { font-weight: 650; }

code, kbd, samp {
  font-family: var(--mono);
  font-size: .855em;
}

/* inline code reads as "a thing in the app", not as decoration */
:not(pre) > code {
  background: var(--surface-2);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: .08em .34em;
  color: var(--ink);
  white-space: nowrap;
}

kbd {
  background: var(--surface);
  border: 1px solid var(--rule-firm);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: .08em .38em;
  font-size: .8em;
  box-shadow: var(--shadow-sm);
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 3rem 0;
}

.lede {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin: 0 0 1.6rem;
  text-wrap: pretty;
}

.eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 .7rem;
}
.eyebrow a { color: inherit; text-decoration: none; }
.eyebrow a:hover { color: var(--accent); }

.small { font-size: .88rem; color: var(--ink-soft); }
.muted { color: var(--ink-soft); }

/* ------------------------------------------------------------------ topbar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: saturate(1.6) blur(12px);
  -webkit-backdrop-filter: saturate(1.6) blur(12px);
  border-bottom: 1px solid var(--rule);
}
.topbar__in {
  max-width: var(--shell);
  margin: 0 auto;
  padding: .55rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: .5rem;
  text-decoration: none;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: -.01em;
  white-space: nowrap;
}
.brand__mark {
  width: 9px; height: 9px;
  border-radius: 2px;
  background: var(--accent);
  align-self: center;
  flex: none;
}
.brand__sub {
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 400;
}

.topnav {
  display: flex;
  gap: .15rem;
  margin-left: auto;
  align-items: center;
  overflow-x: auto;
  scrollbar-width: none;
}
.topnav::-webkit-scrollbar { display: none; }
.topnav a {
  font-size: .845rem;
  color: var(--ink-soft);
  text-decoration: none;
  padding: .32rem .6rem;
  border-radius: 6px;
  white-space: nowrap;
}
.topnav a:hover { background: var(--surface-2); color: var(--ink); }
.topnav a[aria-current="page"] { color: var(--ink); background: var(--accent-wash); }

/* The way back out of the tour, to the site's front door. Set apart from the
   section links so it does not read as another section. */
.topnav__home {
  color: var(--ink-faint) !important;
  margin-right: .35rem;
  padding-right: .7rem !important;
  border-right: 1px solid var(--rule);
  border-radius: 0 !important;
}
.topnav__home:hover { background: transparent !important; color: var(--accent) !important; }
.topnav__home::before { content: "\2190"; margin-right: .3em; }

.iconbtn {
  flex: none;
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border: 1px solid var(--rule);
  background: var(--surface);
  color: var(--ink-soft);
  border-radius: 7px;
  cursor: pointer;
  padding: 0;
}
.iconbtn:hover { color: var(--ink); border-color: var(--rule-firm); }
.iconbtn svg { width: 15px; height: 15px; }

/* ------------------------------------------------------------------ layout */

.shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.page {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: 3.5rem;
  align-items: start;
  padding: 2.5rem 0 6rem;
}

.article { max-width: var(--measure); min-width: 0; }
.article > * { max-width: var(--measure); }

/* things allowed to escape the measure and use the full column */
.bleed {
  max-width: none !important;
  width: 100%;
}
@media (min-width: 1180px) {
  .bleed { width: calc(100% + 9rem); }
}

/* ------------------------------------------------------------- the TOC rail */

.rail {
  position: sticky;
  top: 5rem;
  max-height: calc(100vh - 7rem);
  overflow-y: auto;
  font-size: .855rem;
  padding-right: .5rem;
  scrollbar-width: thin;
}
.rail__title {
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 .7rem;
  padding-left: .75rem;
}
.rail ol { list-style: none; margin: 0; padding: 0; }
.rail li { margin: 0; }
.rail a {
  display: block;
  padding: .28rem .75rem;
  color: var(--ink-soft);
  text-decoration: none;
  border-left: 2px solid var(--rule);
  line-height: 1.4;
}
.rail a:hover { color: var(--ink); border-left-color: var(--rule-firm); }
.rail a.is-active {
  color: var(--accent);
  border-left-color: var(--accent);
  font-weight: 550;
}
.rail .rail--sub a { padding-left: 1.6rem; font-size: .8rem; }

@media (max-width: 940px) {
  .page { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .rail {
    position: static;
    max-height: none;
    margin-bottom: 2.5rem;
    padding: 1rem 1.1rem;
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
  }
  .bleed { width: 100%; }
}

/* ------------------------------------------------------------------ badges */

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-family: var(--mono);
  font-size: .705rem;
  letter-spacing: .04em;
  padding: .18rem .5rem;
  border-radius: 5px;
  border: 1px solid var(--rule-firm);
  background: var(--surface);
  color: var(--ink-soft);
  white-space: nowrap;
}
.badge::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  opacity: .75;
  flex: none;
}

.badge--free   { color: var(--good);   border-color: color-mix(in srgb, var(--good) 35%, var(--rule)); background: var(--good-wash); }
.badge--gate   { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 35%, var(--rule)); background: var(--accent-wash); }
.badge--wip    { color: var(--warn);   border-color: color-mix(in srgb, var(--warn) 35%, var(--rule)); background: var(--warn-wash); }
.badge--risk   { color: var(--alert);  border-color: color-mix(in srgb, var(--alert) 35%, var(--rule)); background: var(--alert-wash); }
.badge--ver    { color: var(--ink-faint); }
.badge--plain::before { display: none; }

/* ------------------------------------------------------- the "where" strip */

.where {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .3rem .45rem;
  font-family: var(--mono);
  font-size: .795rem;
  padding: .6rem .85rem;
  background: var(--surface-2);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  margin: 0 0 1.6rem;
  color: var(--ink-soft);
}
.where__label {
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-right: .2rem;
}
.where b { color: var(--ink); font-weight: 600; }
.where .sep { color: var(--ink-faint); }

/* --------------------------------------------------------------- callouts */

.note {
  margin: 1.6rem 0;
  padding: .95rem 1.1rem;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--ink-faint);
  border-radius: var(--radius-sm);
  background: var(--surface);
  font-size: .945rem;
}
.note > :last-child { margin-bottom: 0; }
.note__t {
  display: block;
  font-family: var(--mono);
  font-size: .69rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: .35rem;
}

.note--warn  { border-left-color: var(--warn);  background: var(--warn-wash); }
.note--warn  .note__t { color: var(--warn); }
.note--alert { border-left-color: var(--alert); background: var(--alert-wash); }
.note--alert .note__t { color: var(--alert); }
.note--good  { border-left-color: var(--good);  background: var(--good-wash); }
.note--good  .note__t { color: var(--good); }
.note--key   { border-left-color: var(--accent); background: var(--accent-wash); }
.note--key   .note__t { color: var(--accent); }

/* --------------------------------------------------------------- the fold */

/* "What breaks without it" — the two-column before/after that opens a page */
.fold {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 1.8rem 0;
}
.fold > div { background: var(--surface); padding: 1.1rem 1.2rem; }
.fold h4 {
  margin: 0 0 .5rem;
  font-family: var(--mono);
  font-size: .69rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ink-faint);
}
.fold--before h4 { color: var(--alert); }
.fold--after  h4 { color: var(--good); }
.fold p:last-child { margin-bottom: 0; }
.fold p { font-size: .94rem; }
@media (max-width: 620px) { .fold { grid-template-columns: 1fr; } }

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

.tbl-wrap { overflow-x: auto; margin: 1.5rem 0; }
table {
  border-collapse: collapse;
  width: 100%;
  font-size: .92rem;
}
th, td {
  text-align: left;
  padding: .58rem .8rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
thead th {
  font-family: var(--mono);
  font-size: .69rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 500;
  border-bottom-color: var(--rule-firm);
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--surface-2); }
td code { white-space: normal; }

/* ---------------------------------------------------------------- figures */

figure {
  margin: 2rem 0;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}
figure img { width: 100%; background: var(--surface-2); }
figcaption {
  padding: .7rem .95rem;
  font-size: .855rem;
  line-height: 1.5;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  background: var(--surface-2);
}
figcaption b { color: var(--ink); }

/* ------------------------------------------------------------ demo frames */

.demo {
  margin: 2.2rem 0;
  background: var(--surface);
  border: 1px solid var(--rule-firm);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.demo__head {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .7rem 1rem;
  border-bottom: 1px solid var(--rule);
  background: var(--surface-2);
}
.demo__tag {
  font-family: var(--mono);
  font-size: .655rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--accent);
  padding: .13rem .42rem;
  border-radius: 4px;
  flex: none;
}
.demo__title { font-size: .95rem; font-weight: 600; font-family: var(--sans); }
.demo__hint {
  margin-left: auto;
  font-size: .79rem;
  color: var(--ink-faint);
  text-align: right;
}

/* Demos lay themselves out against THIS box, not the viewport: the same demo
   sits in a 640px column on a laptop and a 1050px one on a wide screen, and
   the viewport tells it nothing useful about which. */
.demo__body {
  padding: 1.1rem;
  container-type: inline-size;
  container-name: demo;
}

.demo__foot {
  padding: .6rem 1rem;
  border-top: 1px solid var(--rule);
  background: var(--surface-2);
  font-size: .81rem;
  color: var(--ink-soft);
}
.demo__foot code { font-size: .95em; }

/* the "this is the real algorithm" seal */
.seal {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-family: var(--mono);
  font-size: .7rem;
  color: var(--good);
}
.seal svg { width: 12px; height: 12px; flex: none; }

/* A labelled sub-view inside a demo: little title bar, then a canvas. Used by
   every demo that shows two or three views of the same data side by side. */
.vbox {
  border: 1px solid var(--rule);
  border-radius: 7px;
  overflow: hidden;
  background: var(--surface);
}
.vbox__hd {
  display: flex;
  justify-content: space-between;
  gap: .6rem;
  padding: .3rem .55rem;
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border-bottom: 1px solid var(--rule);
  background: var(--surface-2);
  white-space: nowrap;
}
/* The title gives way first; the status on the right is the shorter, more
   useful half, so it never gets squeezed out. */
.vbox__hd > :first-child { overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.vbox__hd > :last-child  { flex: none; }

/* ----------------------------------------------------------- demo controls */

.ctrls {
  display: grid;
  gap: .85rem 1.4rem;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.ctrl { display: flex; flex-direction: column; gap: .3rem; min-width: 0; }
.ctrl__label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: .5rem;
  font-size: .78rem;
  color: var(--ink-soft);
}
.ctrl__label b {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--ink);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%;
  height: 18px;
  background: transparent;
  cursor: pointer;
  margin: 0;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 3px; border-radius: 2px; background: var(--rule-firm);
}
input[type="range"]::-moz-range-track {
  height: 3px; border-radius: 2px; background: var(--rule-firm);
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 14px; height: 14px; margin-top: -5.5px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--surface);
  box-shadow: 0 0 0 1px var(--rule-firm);
}
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--surface);
  box-shadow: 0 0 0 1px var(--rule-firm);
}

select, input[type="text"], input[type="number"] {
  font: inherit;
  font-size: .85rem;
  font-family: var(--sans);
  padding: .3rem .5rem;
  border: 1px solid var(--rule-firm);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  width: 100%;
  min-width: 0;
}
input[type="text"] { font-family: var(--mono); }

.btn {
  font: inherit;
  font-size: .84rem;
  padding: .32rem .72rem;
  border: 1px solid var(--rule-firm);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn--on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn--on:hover { color: var(--accent-ink); opacity: .9; }
.btn--sm { font-size: .76rem; padding: .2rem .5rem; }
.btn--ghost { border-color: transparent; background: transparent; color: var(--ink-soft); }
.btn--ghost:hover { background: var(--surface-2); }

.segmented {
  display: inline-flex;
  border: 1px solid var(--rule-firm);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--surface);
}
.segmented button {
  font: inherit;
  font-size: .8rem;
  padding: .26rem .6rem;
  border: 0;
  border-right: 1px solid var(--rule);
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  white-space: nowrap;
}
.segmented button:last-child { border-right: 0; }
.segmented button:hover { background: var(--surface-2); color: var(--ink); }
.segmented button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); }

.switch {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .84rem;
  cursor: pointer;
  color: var(--ink-soft);
  user-select: none;
}
.switch input { accent-color: var(--accent); width: 15px; height: 15px; margin: 0; }
.switch:hover { color: var(--ink); }

/* ------------------------------------------------------- filament swatches */

.slots {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}
.slot {
  display: flex;
  align-items: center;
  gap: .45rem;
  padding: .3rem .5rem .3rem .35rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  font-family: var(--mono);
  font-size: .76rem;
  cursor: pointer;
}
.slot:hover { border-color: var(--rule-firm); }
.slot[aria-pressed="true"] { border-color: var(--accent); background: var(--accent-wash); }
.slot__chip {
  width: 20px; height: 20px;
  border-radius: 4px;
  border: 1px solid rgba(0,0,0,.18);
  flex: none;
}
.slot__td { color: var(--ink-faint); font-size: .72rem; }

/* a result swatch: big, honest, with its hex */
.result {
  display: flex;
  align-items: stretch;
  gap: 0;
  border: 1px solid var(--rule-firm);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.result__patch { width: 74px; flex: none; }
.result__meta {
  padding: .5rem .7rem;
  background: var(--surface-2);
  font-size: .8rem;
  line-height: 1.45;
  flex: 1;
  min-width: 0;
}
.result__meta b { font-family: var(--mono); font-size: .82rem; }

/* --------------------------------------------- mocked app-panel chrome */

/* Used to recreate a gizmo/dialog well enough to point at it. Deliberately
   NOT pixel-perfect — it is a diagram of the panel, not a fake screenshot. */
.panel {
  border: 1px solid var(--rule-firm);
  border-radius: 7px;
  background: var(--surface);
  font-size: .82rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.panel__bar {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .38rem .6rem;
  background: var(--surface-2);
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--ink-soft);
}
.panel__body { padding: .7rem; display: grid; gap: .55rem; }
.panel__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: .5rem;
}
.panel__row > span:first-child { color: var(--ink-soft); }

/* --------------------------------------------------------------- hub cards */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
  gap: 1rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.card {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  padding: 1.05rem 1.15rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color .16s, box-shadow .16s, transform .16s;
}
.card:hover {
  border-color: var(--rule-firm);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card__n {
  font-family: var(--mono);
  font-size: .66rem;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.card__t {
  font-family: var(--serif);
  font-size: 1.16rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -.012em;
}
.card__d {
  font-size: .875rem;
  line-height: 1.5;
  color: var(--ink-soft);
  margin: 0;
  flex: 1;
}
.card__f {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
  margin-top: .2rem;
}
.card__f .badge { font-size: .655rem; padding: .12rem .38rem; }

/* ------------------------------------------------- pages not written yet */

/* These carry no href on purpose, so a half-built site never 404s. Drop the
   `--soon` class and restore the href when the page lands. */
.card--soon { cursor: default; opacity: .62; }
.card--soon:hover { transform: none; box-shadow: none; border-color: var(--rule); }
.card--soon .card__t::after {
  content: "being written";
  display: inline-block;
  margin-left: .5rem;
  vertical-align: middle;
  font-family: var(--mono);
  font-size: .6rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--warn);
  border: 1px solid color-mix(in srgb, var(--warn) 35%, var(--rule));
  background: var(--warn-wash);
  border-radius: 4px;
  padding: .1rem .34rem;
}

.soon {
  color: var(--ink-soft);
  border-bottom: 1px dotted var(--rule-firm);
  cursor: help;
}

.pager__soon {
  display: block;
  padding: .85rem 1rem;
  border: 1px dashed var(--rule-firm);
  border-radius: var(--radius);
  color: var(--ink-faint);
  background: transparent;
}
.pager__soon small {
  display: block;
  font-family: var(--mono);
  font-size: .67rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.pager__soon b { font-family: var(--serif); font-size: 1.02rem; font-weight: 600; color: var(--ink-soft); }
.pager .is-next { text-align: right; }

/* --------------------------------------------------------------- next/prev */

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
}
.pager a {
  display: block;
  padding: .85rem 1rem;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  background: var(--surface);
}
.pager a:hover { border-color: var(--accent); }
.pager small {
  display: block;
  font-family: var(--mono);
  font-size: .67rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: .2rem;
}
.pager b { font-family: var(--serif); font-size: 1.02rem; font-weight: 600; }
.pager .is-next { text-align: right; }
@media (max-width: 620px) { .pager { grid-template-columns: 1fr; } }

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

.foot {
  border-top: 1px solid var(--rule);
  background: var(--paper-2);
  padding: 2.2rem 0 3rem;
  font-size: .855rem;
  color: var(--ink-soft);
}
.foot__in {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  justify-content: space-between;
}
.foot a { color: var(--ink-soft); }
.foot a:hover { color: var(--accent); }
.foot p { margin: 0 0 .35rem; max-width: 34rem; }

/* ------------------------------------------------------------------- misc */

.kv {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .25rem 1rem;
  font-size: .87rem;
  margin: 1.2rem 0;
}
.kv dt { font-family: var(--mono); font-size: .78rem; color: var(--ink-faint); }
.kv dd { margin: 0; }

.noscript {
  padding: .7rem 1rem;
  background: var(--warn-wash);
  border: 1px solid var(--warn);
  border-radius: var(--radius-sm);
  font-size: .88rem;
  margin: 1.5rem 0;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 1rem; top: .5rem;
  z-index: 100;
  background: var(--surface);
  padding: .5rem .9rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
}

@media print {
  .topbar, .rail, .pager, .foot, .demo__foot { display: none !important; }
  .page { grid-template-columns: 1fr; }
  body { background: #fff; font-size: 11pt; }
  .demo { break-inside: avoid; box-shadow: none; }
}