/* strata — amber on black.
 *
 * One typeface, monospace, everywhere. Not a stylistic flourish: every number
 * on this page belongs in a column with the numbers above and below it, and a
 * proportional face breaks every one of those columns. Once the numbers have to
 * be mono, headings set in something else would be two pages stapled together.
 *
 * The amber is a phosphor colour and it is spent on one job: the rung the coin
 * is standing on, and money that is live. Everything settled recedes. So when
 * the page shows amber it means "this is happening", not "a brand wanted to be
 * noticed".
 *
 * No font is loaded from anywhere. No script is loaded from anywhere. Both are
 * checked by the tests, because a page that says it is not watching you and
 * then pulls a font off a CDN has handed the reader's IP to a third party on
 * the first paint.
 */

:root {
  --ground:  #0a0805;
  --panel:   #100c06;
  --sunk:    #16110a;
  --rule:    #241c11;
  --rule-2:  #3a2d1a;

  --ink:     #e8ddc6;
  --dim:     #9d9078;
  --faint:   #5f5642;
  --ghost:   #372f22;

  --amber:   #ffb000;      /* live: the rung it is on, money not yet paid */
  --amber-hi:#ffd479;
  --amber-lo:#a8730a;
  --amber-bg:#2a1c02;

  --red:     #ff6b4a;

  /* Two faces, and the split is a rule rather than a taste: mono wherever a
     number has to sit in a column under another number — every table, every
     figure, the ladder, the labels — and a sans everywhere a sentence runs.
     Setting prose in mono was costing about a fifth of the reading speed and
     buying nothing, because prose has no columns to keep. Neither face is
     loaded from anywhere; both are already on the machine. */
  --sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
          Helvetica, Arial, sans-serif;
  --mono: ui-monospace, 'SF Mono', SFMono-Regular, Menlo, Consolas,
          'DejaVu Sans Mono', 'Liberation Mono', monospace;

  --col: 78rem;
  --r: 10px;
  --lift: 0 1px 0 rgba(255,196,74,.04) inset,
          0 18px 44px -28px rgba(0,0,0,.9);
  --lab: .69rem;
  --ease: cubic-bezier(.22,.7,.24,1);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 400 15.5px/1.68 var(--sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* The ground is not flat. A phosphor screen has a bloom where the beam is
   working and falls off to nothing at the edges, and one wide soft gradient
   does more for the feeling of an instrument than a raster of hard scanlines,
   which mostly just makes text harder to read. */
body::before {
  content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(255,176,0,.055), transparent 60%),
    radial-gradient(90% 60% at 100% 8%, rgba(255,140,0,.035), transparent 55%);
}
body > * { position: relative; z-index: 1; }

a { color: var(--amber); text-decoration: none;
    border-bottom: 1px solid rgba(255,176,0,.24);
    transition: border-color .16s var(--ease); }
a:hover { border-bottom-color: var(--amber); }
code { font: .92em/1 var(--mono); color: var(--amber-hi); }
b { font-weight: 400; color: var(--ink); }
em { font-style: normal; color: var(--amber); }

.wrap { width: min(100% - 2.6rem, var(--col)); margin-inline: auto; }

/* ─────────────────────────────────────────────────────────────────── chrome */

.strip {
  border-bottom: 1px solid var(--rule);
  background: var(--panel);
  font: 400 .74rem/1.6 var(--mono); color: var(--dim);
}
.strip .wrap { display: flex; gap: 1.2rem; align-items: center;
               padding: .55rem 0; flex-wrap: wrap; }
.strip .right { margin-left: auto; }
.strip code { word-break: break-all; }
.strip button {
  font: inherit; color: var(--dim); background: transparent;
  border: 1px solid var(--rule-2); border-radius: 3px;
  padding: .05rem .45rem; margin-left: .5rem; cursor: pointer;
}
.strip button:hover { color: var(--amber); border-color: var(--amber-lo); }

.bar {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid var(--rule);
  background: color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter: blur(8px);
}
.bar .wrap { display: flex; align-items: center; gap: 1.4rem; padding: .85rem 0; }
.brand { display: flex; align-items: center; gap: .7rem; border: 0; color: var(--ink); }
.brand img { width: 26px; height: 26px; display: block; }
.brand .wordmark { width: 78px; height: auto; object-fit: contain; }
.brand b { letter-spacing: .2em; font: 400 .8rem var(--mono);
           text-transform: uppercase; }
.bar nav { display: flex; gap: .3rem; margin-left: auto; font-size: .84rem; }
.bar nav a { color: var(--dim); border: 0; padding: .3rem .7rem; border-radius: 999px;
             transition: color .16s var(--ease), background .16s var(--ease); }
.bar nav a:hover { color: var(--ink); background: var(--sunk); }
.bar nav a.on { color: var(--amber); background: rgba(255,176,0,.08); }
.head-actions { display: flex; align-items: center; gap: .45rem; margin-left: .35rem; }
.ca-copy, .social-x {
  width: 2rem; height: 2rem; display: grid; place-items: center;
  border: 1px solid var(--rule-2); border-radius: 50%;
  color: var(--dim); background: transparent; transition:
    color .16s var(--ease), border-color .16s var(--ease), background .16s var(--ease);
}
.ca-copy {
  padding: 0; font: 400 .62rem/1 var(--mono); letter-spacing: -.03em; cursor: pointer;
}
.social-x { border: 0; }
.social-x svg { width: .92rem; height: .92rem; display: block; }
.ca-copy:hover, .social-x:hover {
  color: var(--ink); border-color: var(--amber-lo); background: var(--sunk);
}
.ca-copy.copied { color: var(--amber); border-color: var(--amber-lo); }
@media (max-width: 780px) { .hide-sm { display: none; } }
/* the panel header has to stay on one line — a wrapped label in a chrome bar
   reads as a layout that broke rather than a label that is long */
@media (max-width: 1400px) { .hide-md { display: none; } }

.progress { position: fixed; left: 0; top: 0; height: 2px; width: 100%;
            transform: scaleX(0); transform-origin: 0 50%;
            background: var(--amber); z-index: 60; }

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

.hero { padding: 4.6rem 0 3rem; }
.hgrid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.06fr);
         gap: 3.4rem; align-items: center; }
.hcopy { min-width: 0; }
.hrig { min-width: 0; }
@media (max-width: 1080px) {
  .hgrid { grid-template-columns: 1fr; gap: 2.4rem; }
  .hero { padding: 3rem 0 2.4rem; }
}

.lab { font: 400 var(--lab)/1 var(--mono); letter-spacing: .2em;
       text-transform: uppercase; color: var(--faint); margin: 0; }
.lab.on { color: var(--amber-lo); }

h1 { margin: 1.3rem 0 0; font-size: clamp(2.4rem, 5vw, 3.6rem); line-height: 1.04;
     font-weight: 500; letter-spacing: -.035em; max-width: 15ch; text-wrap: balance; }
h2 { margin: .8rem 0 0; font-size: clamp(1.6rem, 3.1vw, 2.15rem); font-weight: 500;
     letter-spacing: -.028em; line-height: 1.12; text-wrap: balance; }
h3 { margin: 0; font-size: 1.02rem; font-weight: 500; color: var(--ink);
     letter-spacing: -.012em; }

.lede { margin: 1.3rem 0 0; color: var(--dim); max-width: 48ch; font-size: 1.02rem;
        line-height: 1.66; }
.lede b { color: var(--ink); }

.acts { display: flex; gap: .7rem; margin-top: 1.6rem; flex-wrap: wrap; }
.btn { border: 1px solid var(--rule-2); border-radius: 999px; padding: .6rem 1.3rem;
       font-size: .9rem; color: var(--ink); background: var(--panel);
       transition: border-color .16s var(--ease), color .16s var(--ease),
                   transform .16s var(--ease), background .16s var(--ease); }
.btn:hover { border-color: var(--amber-lo); color: var(--amber);
             background: var(--sunk); transform: translateY(-1px); }
.btn.go { background: var(--amber); border-color: var(--amber); color: #1a1200; }
.btn.go { box-shadow: 0 0 0 0 rgba(255,176,0,.4); }
.btn.go:hover { background: var(--amber-hi); border-color: var(--amber-hi);
                color: #1a1200; box-shadow: 0 8px 28px -10px rgba(255,176,0,.5); }

/* ─────────────────────────────────────────────────────────── the ladder itself */

.rig { border: 1px solid var(--rule-2); background: var(--panel);
       border-radius: var(--r); overflow: hidden; box-shadow: var(--lift);
       position: relative; }
/* the bloom a lit screen puts on the bezel around it */
.rig::after { content: ''; position: absolute; inset: -1px; border-radius: inherit;
              pointer-events: none;
              box-shadow: 0 0 60px -20px rgba(255,176,0,.18) inset; }
.hrig .rig { margin-top: 0; }
.rig .top, .rig .foot {
  display: flex; gap: 1rem; align-items: center; padding: .72rem 1.05rem;
  font: 400 var(--lab)/1 var(--mono); letter-spacing: .16em;
  text-transform: uppercase; color: var(--faint); background: var(--sunk);
}
.rig .top { border-bottom: 1px solid var(--rule); flex-wrap: nowrap; }
.rig .top > span, .rig .foot > span { white-space: nowrap; }
.rig .foot { border-top: 1px solid var(--rule); flex-wrap: wrap; }
.rig .top .now, .rig .foot .v { margin-left: auto; color: var(--amber); }
.rig .foot .cell { display: flex; gap: .5rem; align-items: baseline; }
.rig .foot .cell b { color: var(--amber); }

pre.ladder {
  margin: 0; padding: 1.1rem .95rem; overflow-x: auto;
  font: 14px/1.75 var(--mono); white-space: pre; color: var(--dim);
  letter-spacing: .01em;
}
/* the four tones the ladder is drawn in, and nothing else uses these tags */
pre.ladder mark { background: transparent; color: var(--amber-hi); }
pre.ladder b    { color: var(--amber); }            /* banked, not yet paid for */
pre.ladder i    { color: var(--amber-lo); font-style: normal; }  /* paid and burned */
pre.ladder u    { color: var(--ink); text-decoration: none; }    /* the peak rung */
pre.ladder s    { color: var(--ghost); text-decoration: none; }  /* never banked */

.key { display: flex; gap: 1.4rem; flex-wrap: wrap; margin-top: 1rem;
       font: 400 .76rem var(--mono); color: var(--faint); }
.key span { display: flex; gap: .45rem; align-items: center; }
.key i { font-style: normal; }
.key .k1 { color: var(--amber); }
.key .k2 { color: var(--amber-lo); }
.key .k3 { color: var(--ghost); }

/* ───────────────────────────────────────────────────────────────────── tiles */

.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: .8rem;
         margin-top: 2.6rem; }
.tile { background: var(--panel); padding: 1.15rem 1.2rem;
        border: 1px solid var(--rule); border-radius: var(--r);
        position: relative; overflow: hidden;
        transition: border-color .18s var(--ease), transform .18s var(--ease); }
/* a hairline of the accent along the top edge, brighter on the live one */
.tile::before { content: ''; position: absolute; left: 0; right: 0; top: 0; height: 1px;
                background: linear-gradient(90deg, var(--amber-lo), transparent 70%);
                opacity: .5; }
.tile:hover { border-color: var(--rule-2); transform: translateY(-2px); }
.tile .lab { margin-bottom: .85rem; }
.tile .v { font: 400 1.7rem/1.05 var(--mono); color: var(--ink);
           letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.tile .v em { font-size: .55em; color: var(--faint); margin-left: .35em; }
.tile .v.on { color: var(--amber); }
.tile .n { margin-top: .6rem; font-size: .8rem; color: var(--faint); line-height: 1.5; }
.tile .v.on { text-shadow: 0 0 24px rgba(255,176,0,.35); }
@media (max-width: 1080px) { .tiles { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .tiles { grid-template-columns: 1fr; } }

/* ────────────────────────────────────────────────────────────────── sections */

section { padding: 6rem 0; border-top: 1px solid var(--rule); }
.head { max-width: 58ch; }
.head p { color: var(--dim); font-size: 1rem; margin-top: 1rem; line-height: 1.66; }

.cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: .8rem;
        margin-top: 2.4rem; }
.cols > div { background: var(--panel); padding: 1.5rem 1.45rem;
              border: 1px solid var(--rule); border-radius: var(--r);
              transition: border-color .18s var(--ease), transform .18s var(--ease); }
.cols > div:hover { border-color: var(--rule-2); transform: translateY(-2px); }
.cols .n { font: 400 var(--lab)/1 var(--mono); letter-spacing: .2em;
           color: var(--amber-lo); text-transform: uppercase; }
.cols h3 { margin: .9rem 0 .6rem; }
.cols p { margin: 0; color: var(--dim); font-size: .92rem; line-height: 1.62; }
.cols pre { margin: 1.1rem 0 0; padding: .8rem .9rem; background: var(--sunk);
            border: 1px solid var(--rule); border-radius: 8px;
            font: 400 .78rem/1.6 var(--mono); color: var(--faint); overflow-x: auto; }
.cols pre b { color: var(--amber); }
@media (max-width: 900px) { .cols { grid-template-columns: 1fr; } }

ul.notes { list-style: none; margin: 2.6rem 0 0; padding: 0; max-width: 72ch; }
ul.notes li { position: relative; padding-left: 1.6rem; margin-bottom: 1.1rem;
              color: var(--dim); font-size: .95rem; line-height: 1.64; }
ul.notes li::before { content: '\2014'; position: absolute; left: 0;
                      color: var(--amber-lo); }
ul.notes b { color: var(--ink); }

/* ──────────────────────────────────────────────────────────────────── tables */

.sheet { margin-top: 2.2rem; border: 1px solid var(--rule-2); border-radius: var(--r);
         background: var(--panel); overflow: hidden; box-shadow: var(--lift); }
.sheet .cap { display: flex; gap: 1rem; align-items: center; padding: .72rem 1.05rem;
              background: var(--sunk); border-bottom: 1px solid var(--rule);
              font: 400 var(--lab)/1 var(--mono); letter-spacing: .16em;
              text-transform: uppercase; color: var(--faint); }
.sheet .cap .right { margin-left: auto; }
.scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse;
        font: 400 .82rem/1.5 var(--mono); font-variant-numeric: tabular-nums; }
th { text-align: right; font-weight: 400; padding: .65rem .9rem;
     font-size: var(--lab); letter-spacing: .14em; text-transform: uppercase;
     color: var(--faint); border-bottom: 1px solid var(--rule); white-space: nowrap; }
td { text-align: right; padding: .58rem .9rem; border-bottom: 1px solid var(--rule);
     white-space: nowrap; color: var(--dim); }
th:first-child, td:first-child { text-align: left; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: var(--sunk); }
td.who { color: var(--ink); }
td .on { color: var(--amber); }
td .off { color: var(--ghost); }
td .bad { color: var(--red); }

/* which rungs a wallet banked on, as a tiny strip of blocks */
.strip-rungs { letter-spacing: .06em; color: var(--ghost); }
.strip-rungs b { color: var(--amber); }
.strip-rungs i { color: var(--amber-lo); font-style: normal; }

.tag { font: 400 .68rem var(--mono); letter-spacing: .1em; text-transform: uppercase;
       color: var(--faint); }
.tag.live { color: var(--amber-lo); }
.tag.back { color: var(--red); }

.after { margin-top: .9rem; color: var(--faint); font-size: .8rem; max-width: 74ch; }

/* the empty state, said properly rather than left blank */
td.hollow { padding: 2.6rem 1rem !important; text-align: center; }
td.hollow .chip { display: inline-block; border: 1px solid var(--amber-lo);
                  color: var(--amber); border-radius: 999px; padding: .34em .8em;
                  font-size: var(--lab); letter-spacing: .16em; text-transform: uppercase; }
td.hollow b { display: block; margin: .9rem 0 .35rem; color: var(--ink); font-size: 1rem; }
td.hollow span.why { display: block; width: 44ch; max-width: 100%; margin-inline: auto;
                     white-space: normal; color: var(--faint); font-size: .8rem;
                     line-height: 1.6; }

/* ─────────────────────────────────────────────────────────────────── lookup */

.look { display: flex; gap: .6rem; margin-top: 1.6rem; max-width: 40rem; }
.look input {
  flex: 1; font: 400 .88rem var(--mono); color: var(--ink);
  background: var(--panel); border: 1px solid var(--rule-2); border-radius: 999px;
  padding: .68rem 1.1rem;
  transition: border-color .16s var(--ease), box-shadow .16s var(--ease);
}
.look input:focus { outline: 0; border-color: var(--amber-lo);
                    box-shadow: 0 0 0 3px rgba(255,176,0,.08); }
.look input::placeholder { color: var(--ghost); }
#found { margin-top: 1.4rem; }

/* ──────────────────────────────────────────────────────────────────── status */

.status { border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
          background: var(--sunk); font-size: .8rem; color: var(--faint); }
.status .wrap { padding: .85rem 0; font: 400 .82rem/1.6 var(--mono); }
.status b { color: var(--amber); }

footer { padding: 4rem 0 5rem; border-top: 1px solid var(--rule); color: var(--faint);
         font-size: .88rem; }
footer nav { display: flex; gap: 1.3rem; margin-bottom: 1rem; }
footer a { color: var(--dim); border: 0; }
footer a:hover { color: var(--amber); }
footer p { margin: .4rem 0 0; max-width: 70ch; }

/* ────────────────────────────────────────────────────────────────── movement */

[data-in] { opacity: 0; transform: translateY(18px);
            transition: opacity .7s var(--ease), transform .7s var(--ease); }
[data-in].seen { opacity: 1; transform: none; }
[data-stagger] > * { opacity: 0; transform: translateY(16px);
                     transition: opacity .6s var(--ease), transform .6s var(--ease); }
[data-stagger].seen > * { opacity: 1; transform: none; }
[data-stagger].seen > *:nth-child(2) { transition-delay: .08s; }
[data-stagger].seen > *:nth-child(3) { transition-delay: .16s; }
[data-stagger].seen > *:nth-child(4) { transition-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
  [data-in], [data-stagger] > * { opacity: 1 !important; transform: none !important;
                                  transition: none !important; }
  .progress { display: none; }
}

/* ═══════════════════════════════════════════════════════════════ the movement
 *
 * Three things move on this page and each one is doing a job.
 *
 * The hero boots, because an instrument that appears fully drawn looks like a
 * picture of an instrument. The ladder's bars grow from nothing the first time
 * they are seen, at the speed they would actually grow. And the mechanism
 * section is driven by the scroll: the panel is pinned and the steps beside it
 * put it into the four states the engine really produces.
 *
 * All of it is off under prefers-reduced-motion, and the page is complete and
 * correct without a single frame of it.
 */

/* the blinking block after the headline. A terminal has one; this is one */
.caret { display: inline-block; width: .52em; height: .92em; margin-left: .12em;
         background: var(--amber); vertical-align: -.08em;
         animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 0%, 55% { opacity: 1 } 56%, 100% { opacity: 0 } }

/* ── the boot ─────────────────────────────────────────────────────────────── */

.boot-in .hero .lab      { animation: rise .6s var(--ease) .05s both; }
.boot-in .hero h1        { animation: rise .75s var(--ease) .18s both; }
.boot-in .hero .lede     { animation: rise .75s var(--ease) .34s both; }
.boot-in .hero .acts     { animation: rise .7s  var(--ease) .46s both; }
.boot-in .hero .rig      { animation: panel .9s var(--ease) .5s both; }
.boot-in .hero .key      { animation: rise .7s  var(--ease) .8s both; }
.boot-in .hero .tiles    { animation: rise .8s  var(--ease) .9s both; }
.boot-in .hero .caret    { animation: blink 1.1s steps(1) .9s infinite; opacity: 0; }

@keyframes rise  { from { opacity: 0; transform: translateY(14px) }
                   to   { opacity: 1; transform: none } }
@keyframes panel { from { opacity: 0; transform: translateY(20px) scale(.994) }
                   to   { opacity: 1; transform: none } }

/* the ladder wipes on from the left the first time it is drawn, which is the
   direction its bars are read in */
pre.ladder.wipe { animation: wipe 1.1s cubic-bezier(.3,.05,.2,1) both; }
@keyframes wipe { from { clip-path: inset(0 100% 0 0) } to { clip-path: inset(0 0 0 0) } }

/* ── the dock ─────────────────────────────────────────────────────────────── */

.dock {
  position: fixed; left: 0; right: 0; top: 0; z-index: 55;
  background: var(--panel); border-bottom: 1px solid var(--rule-2);
  transform: translateY(-105%); transition: transform .38s var(--ease);
  font-size: .78rem; color: var(--dim);
}
.dock.up { transform: none; }
.dock .wrap { display: flex; gap: 1.4rem; align-items: center; padding: .62rem 0;
               font: 400 .78rem var(--mono); }
.dock .dl { white-space: nowrap; }
.dock .dl.dim { color: var(--faint); }
.dock .dl.amber { color: var(--amber); margin-left: auto; }
.dock .pip { width: .5em; height: .5em; border-radius: 50%; background: var(--amber);
             animation: pulse 2.4s ease-out infinite; flex: none; }
@keyframes pulse { 0% { opacity: 1 } 50% { opacity: .3 } 100% { opacity: 1 } }
@media (max-width: 640px) { .dock .dl.dim { display: none; } }

/* ── the scrollytelling ───────────────────────────────────────────────────── */

.story { display: grid; grid-template-columns: 1fr 1.05fr; gap: 3.5rem;
         margin-top: 2.6rem; align-items: start; }

.steps { display: flex; flex-direction: column; }
.step { padding: 3.6rem 0; opacity: .26;
        transition: opacity .45s var(--ease); }
.step:first-child { padding-top: 1rem; }
.step:last-child { padding-bottom: 6rem; }
.step.on { opacity: 1; }
.step .n { font-size: var(--lab); letter-spacing: .24em; color: var(--amber-lo);
           margin: 0 0 .8rem; }
.step h3 { font-size: 1.2rem; margin-bottom: .7rem; }
.step p { margin: 0; color: var(--dim); font-size: .95rem; max-width: 42ch;
          line-height: 1.64; }
.step pre { margin: 1.2rem 0 0; padding: .8rem .95rem; background: var(--sunk);
            border: 1px solid var(--rule); border-radius: 8px;
            font: 400 .8rem/1.6 var(--mono); color: var(--faint); overflow-x: auto; }
.step pre b { color: var(--amber); }
/* a rule down the left of the steps, filled to the step you are on */
.steps { position: relative; padding-left: 1.6rem; }
.steps::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0;
                 width: 1px; background: var(--rule); }
.steps::after { content: ''; position: absolute; left: 0; top: 0; width: 1px;
                height: var(--told, 0%); background: var(--amber);
                transition: height .35s var(--ease); }

.stage { position: sticky; top: 7rem; }
.rig.pin { margin-top: 0; }
.rig.pin pre.ladder { padding: 1.3rem 1rem; }
.rig.pin .foot { color: var(--dim); }

@media (max-width: 900px) {
  .story { grid-template-columns: 1fr; gap: 1.4rem; }
  .stage { position: static; order: -1; }
  .step { padding: 2rem 0; opacity: 1; }
}

/* the section rules draw across as they arrive */
section { position: relative; }
section::before { content: ''; position: absolute; left: 0; top: -1px; height: 1px;
                  width: 0; background: var(--amber-lo);
                  transition: width 1s var(--ease); }
section.seen-rule::before { width: 100%; }

/* table rows arrive in sequence rather than all at once */
tbody.arrive tr { opacity: 0; transform: translateY(8px);
                  transition: opacity .4s var(--ease), transform .4s var(--ease); }
tbody.arrive.seen tr { opacity: 1; transform: none; }
tbody.arrive.seen tr:nth-child(1)  { transition-delay: .02s }
tbody.arrive.seen tr:nth-child(2)  { transition-delay: .05s }
tbody.arrive.seen tr:nth-child(3)  { transition-delay: .08s }
tbody.arrive.seen tr:nth-child(4)  { transition-delay: .11s }
tbody.arrive.seen tr:nth-child(5)  { transition-delay: .14s }
tbody.arrive.seen tr:nth-child(6)  { transition-delay: .17s }
tbody.arrive.seen tr:nth-child(7)  { transition-delay: .20s }
tbody.arrive.seen tr:nth-child(8)  { transition-delay: .23s }

@media (prefers-reduced-motion: reduce) {
  .caret { animation: none; }
  .boot-in .hero .lab, .boot-in .hero h1, .boot-in .hero .lede,
  .boot-in .hero .acts, .boot-in .hero .rig, .boot-in .hero .key,
  .boot-in .hero .tiles, .boot-in .hero .caret,
  pre.ladder.wipe { animation: none; opacity: 1; transform: none; }
  .dock { display: none; }
  .step { opacity: 1; }
  section::before { width: 100%; transition: none; }
  tbody.arrive tr { opacity: 1; transform: none; transition: none; }
}