/*
 * All rights reserved. See LICENSE.md.
 * Copyright (c) 2025-2026 Keelson contributors (Fred Cooke)
 *
 * Aesthetic: admiralty chart and naval architecture drawing. A keelson is the
 * beam running the length of a hull above the keel, so the page has one too:
 * a hairline down the left with a station node per section.
 *
 * Palette is the logo's own #002052 and #01a8fd, nothing invented.
 */

/* --------------------------------------------------------------------------
 * Fonts. Self hosted, latin subset, so the site makes no external requests
 * and works offline. IBM Plex, SIL OFL 1.1, see fonts/OFL.txt.
 * ----------------------------------------------------------------------- */

@font-face {
  font-family: 'Plex Cond';
  src: url('../fonts/plex-condensed-700.woff2') format('woff2');
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Plex';
  src: url('../fonts/plex-sans-400.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Plex';
  src: url('../fonts/plex-sans-600.woff2') format('woff2');
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Plex';
  src: url('../fonts/plex-sans-700.woff2') format('woff2');
  font-weight: 700; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('../fonts/plex-mono-400.woff2') format('woff2');
  font-weight: 400; font-style: normal; font-display: swap;
}

/* --------------------------------------------------------------------------
 * Tokens
 * ----------------------------------------------------------------------- */

:root {
  color-scheme: dark light;

  /* Straight off keelson-mark.svg, so the page and the logo cannot drift. */
  --hull: #002052;
  --water: #01a8fd;

  --abyss: #00101f;
  --deep: #041c33;
  --ink: #dbe7f2;
  /* Body-secondary. Distinct from --ink-dim, which is for small labels only:
   * --ink-dim at paragraph size was too low contrast to read comfortably. */
  --ink-soft: #b3c6d8;
  --ink-dim: #9ab2c6;
  --rule: #0e3054;
  --accent: var(--water);
  --label-ink: var(--water);
  --plate: #eef2f5;
  --plate-ink: #445a70;

  /* The chart-paper square. Section padding is one of these, so the gap from
   * a rule to the content it separates always reads as exactly one cell. */
  --grid: 2.5rem;

  --masthead-h: 3.9rem;
  --rail: 3.5rem;
  --measure: 40rem;
  --gutter: 1.5rem;

  --display: 'Plex Cond', 'Helvetica Neue Condensed', sans-serif;
  --body: 'Plex', 'Helvetica Neue', sans-serif;
  --mono: 'Plex Mono', ui-monospace, Menlo, monospace;

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

@media (prefers-color-scheme: light) {
  :root {
    --abyss: #eef1f4;
    --deep: #ffffff;
    --ink: #071f38;
    --ink-soft: #33485e;
    --ink-dim: #3a4f63;
    --rule: #ccd7e1;
    --accent: var(--hull);
    --label-ink: var(--hull);
    --plate: #ffffff;
    --plate-ink: #445a70;
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--masthead-h) + 1rem);
}

body {
  margin: 0;
  background: var(--abyss);
  color: var(--ink);
  font: 400 1rem/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;

  /*
   * Chart paper: a fine grid, plus one soft pool of light behind the hero so
   * the page has depth instead of a flat fill.
   */
  background-image:
    radial-gradient(70rem 45rem at 78% -8%,
      color-mix(in srgb, var(--water) 13%, transparent), transparent 65%),
    linear-gradient(color-mix(in srgb, var(--rule) 42%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--rule) 42%, transparent) 1px, transparent 1px);
  background-size: 100% 100%, var(--grid) var(--grid), var(--grid) var(--grid);
  background-attachment: fixed, scroll, scroll;
}

::selection { background: var(--water); color: #00101f; }

/* --------------------------------------------------------------------------
 * Type
 * ----------------------------------------------------------------------- */

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.02;
  margin: 0;
  text-wrap: balance;
}

/* The wordmark. Set in the full width Plex Sans rather than the condensed cut
 * used elsewhere, and in sentence case: this is a name, not a headline. */
h1 {
  font-family: var(--body);
  font-weight: 700;
  font-size: clamp(3.5rem, 12vw, 9rem);
  letter-spacing: -0.04em;
  line-height: 0.9;
  margin-bottom: 0;
}

h2 {
  font-size: clamp(1.75rem, 3.4vw, 2.6rem);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  /* Wide enough that a headline breaks over two or three lines, not five.
   * Condensed caps stack fast, so a tight measure turns into a column. */
  max-width: 26ch;
}

h3 {
  font-size: 1.0625rem;
  font-family: var(--body);
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.3;
  text-transform: none;
}

p { margin: 0 0 1rem; }

/*
 * Body prose gets the same measure as .lead, so the right edge does not jump
 * between a section's opening paragraph and the ones after it. It also pulls
 * the line back from the ~124 characters the 62rem column allowed, which was
 * well past comfortable regardless of the alignment.
 *
 * Scoped to direct children so the components that set their own width, the
 * split columns, docs list, steps and cards, keep theirs.
 */
.bay-body > p,
.sub > p { max-width: var(--measure); }
a { color: var(--accent); }

.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.55;
  color: var(--ink);
  max-width: var(--measure);
}

/* Chart annotation: small, tracked out, mono numeral in a box.
 *
 * flex-wrap and the min-width are both load bearing. Without them this row
 * cannot break, and a tracked out uppercase string sets a min-content width
 * wider than a phone, which drags the whole page into horizontal overflow. */
.eyebrow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.7rem;
  min-width: 0;
  margin: 0 0 1.5rem;
  font-family: var(--mono);
  /* Weight, size and colour match .sub-label: a section label and a subsection
   * label are the same kind of thing, so they should not read as two different
   * levels of emphasis. --ink-dim at 400 left this one visibly lighter. */
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--label-ink);
}

@media (min-width: 40rem) {
  .eyebrow { letter-spacing: 0.18em; }
}

.eyebrow span {
  padding: 0.2rem 0.45rem;
  color: var(--label-ink);
  border: 1px solid color-mix(in srgb, var(--water) 40%, transparent);
  letter-spacing: 0.1em;
}

.eyebrow::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--rule), transparent);
}

/* A secondary remark under a block: the detail, not the claim. */
.aside {
  margin-top: 1.5rem;
  padding-left: 1rem;
  border-left: 2px solid color-mix(in srgb, var(--water) 35%, transparent);
  color: var(--ink-soft);
  font-size: 0.9375rem;
  max-width: var(--measure);
}

/* Inline code in prose. */
:not(pre) > code {
  font-size: 0.875em;
  padding: 0.1em 0.32em;
  border-radius: 3px;
  background: color-mix(in srgb, var(--ink-dim) 16%, transparent);
  color: var(--ink);
}

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus {
  left: 1rem; top: 1rem; z-index: 20;
  padding: 0.5rem 0.9rem;
  background: var(--water); color: #00101f;
}

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

/* --------------------------------------------------------------------------
 * Masthead
 * ----------------------------------------------------------------------- */

.masthead {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--abyss) 82%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid var(--rule);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  height: var(--masthead-h);
  padding: 0 var(--gutter);
  max-width: 82rem;
  margin: 0 auto;
}

/* The lockup carries the name itself, so there is no text beside it. */
.brand { display: flex; align-items: center; text-decoration: none; }

/* Sized off the height: the lockup is 680x320 with the name under the vessel,
 * so it needs vertical room to stay legible at masthead scale. */
.brand img {
  height: 2.5rem;
  width: auto;
  display: block;
}

/* Navy on the dark ground needs lifting to read. */
@media (prefers-color-scheme: dark) {
  .brand img { filter: brightness(2.8) saturate(0.8); }
}

/* Outbound: the arrow says it leaves the site, so no number in the list. */
.nav-out i { font-style: normal; }

.burger {
  display: grid; gap: 4px;
  padding: 0.5rem; margin-right: -0.5rem;
  background: none; border: 0; cursor: pointer;
}
.burger span {
  display: block; width: 20px; height: 1.5px;
  background: var(--ink);
  transition: transform 0.25s var(--ease), opacity 0.15s linear;
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.nav-menu {
  display: none;
  flex-basis: 100%;
  list-style: none;
  margin: 0;
  padding: 0.5rem 0 1rem;
}
.nav-menu.open { display: block; }

.nav-menu a {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.7rem 0;
  color: var(--ink-dim);
  text-decoration: none;
  font-family: var(--display);
  font-size: 0.9375rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--rule);
  transition: color 0.2s var(--ease);
}

.nav-menu i {
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: color-mix(in srgb, var(--ink-dim) 70%, transparent);
}

.nav-menu a:hover { color: var(--ink); }
.nav-menu a[aria-current="true"] { color: var(--label-ink); }
.nav-menu a[aria-current="true"] i { color: var(--label-ink); }

/*
 * The bar goes horizontal as soon as ten items can physically fit beside the
 * lockup, not when they fit comfortably. The gap and the type scale with the
 * viewport, so the row tightens up as it narrows and only hands over to the
 * burger when it would genuinely collide with the mark.
 */
@media (min-width: 56rem) {
  .burger { display: none; }
  .nav-menu {
    display: flex;
    flex-basis: auto;
    gap: clamp(0.7rem, 1.5vw, 1.75rem);
    padding: 0;
  }
  .nav-menu a {
    display: block;
    padding: 0;
    border: 0;
    font-size: clamp(0.75rem, 0.9vw, 0.8125rem);
    white-space: nowrap;
    position: relative;
  }
  .nav-menu i { display: none; }
  /* The outbound arrow stays: it is the only cue that this one leaves. */
  .nav-menu .nav-out i { display: inline; margin-right: 0.3rem; font-size: 0.75rem; }
  /* Station tick under the active item, echoing the keel nodes. */
  .nav-menu a::after {
    content: '';
    position: absolute;
    left: 50%; bottom: -0.55rem;
    width: 0; height: 2px;
    background: var(--water);
    transform: translateX(-50%);
    transition: width 0.3s var(--ease);
  }
  .nav-menu a[aria-current="true"]::after { width: 100%; }
}

/* --------------------------------------------------------------------------
 * The keel
 * ----------------------------------------------------------------------- */

.keel { display: none; }

@media (min-width: 68rem) {
  .keel {
    display: block;
    position: fixed;
    /* max(), because between 68rem and 82rem the centring term goes negative
     * and took the whole rail off the left edge of the screen. */
    left: max(1.25rem, calc((100vw - 82rem) / 2 + 1.25rem));
    top: calc(var(--masthead-h) + 4rem);
    bottom: 4rem;
    width: 1px;
    background: var(--rule);
    z-index: 5;
  }

  /* Fills from the top as the page scrolls; height set by site.js. */
  .keel-run {
    position: absolute;
    inset: 0 0 auto 0;
    width: 1px;
    height: 0;
    background: linear-gradient(var(--water), color-mix(in srgb, var(--water) 20%, transparent));
    transition: height 0.15s linear;
  }

  /*
   * Every station is the same size and evenly spaced, set by site.js. The fill
   * runs on the same even scale, so the head of the fill always meets a dot as
   * that waypoint arrives.
   */
  .keel b {
    position: absolute;
    left: 50%;
    width: 7px; height: 7px;
    margin: -3.5px 0 0 -3.5px;
    border: 1px solid var(--rule);
    background: var(--abyss);
    transform: rotate(45deg);
    transition: background 0.3s var(--ease), border-color 0.3s var(--ease),
                box-shadow 0.3s var(--ease);
  }

  .keel b.lit {
    background: var(--water);
    border-color: var(--water);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--water) 18%, transparent);
  }

}

/* --------------------------------------------------------------------------
 * Bays (sections)
 * ----------------------------------------------------------------------- */

.bay {
  max-width: 82rem;
  margin: 0 auto;
  padding: var(--grid) var(--gutter);
  border-top: 1px solid var(--rule);
}

.bay:first-child { border-top: 0; }

/* min-width: 0 defeats the grid and flex default of min-content sizing, which
 * is what lets long mono strings and wide <pre> blocks stretch a track instead
 * of scrolling inside it. */
.bay-body { max-width: 62rem; min-width: 0; }
.bay-hero > * { min-width: 0; }

@media (min-width: 68rem) {
  .bay { padding-left: var(--rail); padding-right: var(--rail); }
}

/* Hero: the plate first and near full width, the wordmark beneath it. The rail
 * inset the other bays use is dropped here so the plate runs closer to the
 * edges, which is the point of it being the first thing you see. */
.bay-hero {
  padding-top: clamp(1.5rem, 3.5vh, 2.5rem);
  padding-bottom: var(--grid);
}

@media (min-width: 68rem) {
  .bay-hero { padding-left: var(--gutter); padding-right: var(--gutter); }
  /* Push the wordmark back to the rail the other bays use, so it sits the same
   * one grid off the keel instead of hard against it. */
  .hero-title { margin-left: calc(var(--rail) - var(--gutter)); }
}

/* Wordmark, waterline, claim: stacked, in that reading order. fit-content so
 * the block is exactly as wide as the wordmark, see .tagline below. */
.hero-title {
  width: fit-content;
  margin-top: clamp(1.5rem, 3.5vw, 2.5rem);
}

.tagline {
  /*
   * width:0 keeps the claim out of the parent's intrinsic sizing, so
   * .hero-title shrinks to the wordmark alone; min-width:100% then lays it back
   * out at that width. The claim therefore measures exactly as wide as the word
   * Keelson at any viewport, with no hardcoded ratio to drift out of step when
   * the type scales.
   */
  width: 0;
  min-width: 100%;
  margin: 0;
  font-family: var(--display);
  font-weight: 700;
  /* Sized to run nearly the width of the wordmark above it, so the two read as
   * one lockup rather than a big word with a caption trailing off short. */
  font-size: clamp(1.3rem, 2.7vw, 2.1rem);
  line-height: 1.15;
  color: var(--ink-soft);
  text-wrap: balance;
}

/* The waterline from the mark, redrawn between the name and the claim, running
 * the full width of the wordmark: the parent is already exactly that wide. */
.tagline::before {
  content: '';
  display: block;
  width: 100%;
  height: 3px;
  margin: clamp(0.85rem, 1.8vw, 1.25rem) 0 clamp(0.9rem, 1.9vw, 1.35rem);
  background: var(--water);
}

/* --------------------------------------------------------------------------
 * Drawing plate
 * ----------------------------------------------------------------------- */

.plate {
  margin: 0;
  background: var(--plate);
  border: 1px solid var(--rule);
  box-shadow: 0 24px 60px -30px rgba(0, 8, 20, 0.75);
  position: relative;
}

/* Corner ticks, as on a drawing sheet. */
.plate::before, .plate::after {
  content: '';
  position: absolute;
  width: 12px; height: 12px;
  border: 1px solid color-mix(in srgb, var(--plate-ink) 45%, transparent);
}
.plate::before { top: 7px; left: 7px; border-right: 0; border-bottom: 0; }
.plate::after { bottom: 7px; right: 7px; border-left: 0; border-top: 0; }

.plate-field {
  position: relative;
  overflow: hidden;
  padding: clamp(1rem, 2.2vw, 1.75rem) clamp(1rem, 2.2vw, 1.75rem) clamp(1.25rem, 2.6vw, 2rem);
  /* Faint squared paper inside the plate only. */
  background-image:
    linear-gradient(color-mix(in srgb, var(--plate-ink) 13%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--plate-ink) 13%, transparent) 1px, transparent 1px);
  background-size: 1.25rem 1.25rem;
}

/*
 * keelson-mark.svg carries a lot of empty margin inside its own 680x206
 * viewBox. Measured with getBBox over every drawn shape, the artwork occupies
 * x 41.4..649.1, y 40.0..164.2. So the vessel is really 4.89:1, not the 3.30:1
 * the file claims, and a third of the file's height is nothing at all. Left
 * alone, that empty band is what made the plate taller than it needed to be.
 *
 * Scaled up and pulled out by exactly that margin, with the parent clipping the
 * overhang, so the plate sizes to the vessel rather than to the file. Every
 * percentage resolves against the container width, vertical margins included,
 * which is what keeps the arithmetic consistent.
 *
 *   680 / 607.7 = 111.897%   scale so the artwork spans the field exactly
 *   41.4 / 607.7 =  6.813%   left margin inside the file
 *   30.9 / 607.7 =  5.085%   right
 *   40.0 / 607.7 =  6.582%   top
 *   41.8 / 607.7 =  6.879%   bottom
 *
 * Leaving the field 124.2/607.7 = 20.44% of its width in height.
 */
.plate-field img {
  display: block;
  width: 111.897%;
  height: auto;
  margin: -6.582% -5.085% -6.879% -6.813%;
  position: relative;
  z-index: 1;
}

/* The vessel's waterline, drawn across the full plate. */
.waterline {
  position: absolute;
  left: 0; right: 0;
  bottom: 1.25rem;
  height: 1px;
  background: linear-gradient(90deg,
    transparent, var(--water) 12%, var(--water) 88%, transparent);
  opacity: 0.85;
}

/* A plate used as a figure further down the page, rather than as the hero.
 *
 * Must come after the .plate-field rules above: these override them at equal
 * specificity, so source order is what decides. Placed earlier, the hero's
 * negative-margin crop won and clipped these bitmaps on three sides.
 */
.figure { margin: 2.5rem 0 0; }

/* Holds a bitmap that already carries its own whitespace. None of the hero's
 * cropping applies, and the grid paper would only fight the diagram. */
/* A thin, even gap on all four sides. The diagrams carry their own whitespace,
 * so a full-width plate margin on top of that reads as a wasteful frame. */
.plate-plain {
  padding: 0.5rem;
  background-image: none;
  overflow: visible;
}

.plate-plain img {
  display: block;
  width: 100%;
  height: auto;
  margin: 0;
}

.plate figcaption {
  display: grid;
  gap: 0.4rem 1rem;
  text-align: center;
  padding: 0.85rem clamp(1.25rem, 3vw, 2.5rem);
  border-top: 1px solid color-mix(in srgb, var(--plate-ink) 25%, transparent);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--plate-ink);
}

/* The plate number stays a label: uppercase, like the annotation it is. */
.plate figcaption .fig { text-transform: uppercase; }

/*
 * Three columns with the third left empty, so the title centres against the
 * whole plate rather than against the space left over beside Fig. 1.
 */
@media (min-width: 40rem) {
  .plate figcaption {
    grid-template-columns: 1fr auto 1fr;
    text-align: initial;
  }
  .plate figcaption .fig { justify-self: start; }
  .plate figcaption .cap { justify-self: center; }
}

/* --------------------------------------------------------------------------
 * Mission: the strengths in brief, each a way into its section
 * ----------------------------------------------------------------------- */

.missions {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

@media (min-width: 46rem) { .missions { grid-template-columns: 1fr 1fr; } }

.missions a {
  display: block;
  height: 100%;
  padding: 1.15rem 1.35rem;
  background: var(--abyss);
  text-decoration: none;
  position: relative;
  transition: background 0.3s var(--ease);
}

.missions a::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 0; height: 2px;
  background: var(--water);
  transition: width 0.35s var(--ease);
}

.missions a:hover,
.missions a:focus-visible { background: var(--deep); }
.missions a:hover::before,
.missions a:focus-visible::before { width: 100%; }

.missions b {
  display: block;
  margin-bottom: 0.3rem;
  font-family: var(--display);
  font-size: 1.0625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--label-ink);
}

.missions span {
  display: block;
  color: var(--ink-soft);
  font-size: 0.9375rem;
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
 * Subsections inside a bay
 * ----------------------------------------------------------------------- */

.sub {
  margin-top: var(--grid);
  padding-top: var(--grid);
  border-top: 1px solid var(--rule);
  /* Its own anchor target, since the mission list links straight in. */
  scroll-margin-top: calc(var(--masthead-h) + 1rem);
}

/*
 * --label-ink, not --water: the cyan measures 2.31:1 on the light ground, well
 * under the 4.5:1 minimum, and this is small tracked-out type where it matters
 * most. The token is the cyan in dark mode, where it reads at 7.33:1, and the
 * hull navy in light, where it reads at 13.94:1.
 */
.sub-label {
  margin: 0 0 0.6rem;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--label-ink);
}

.sub-head {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin: 0 0 1.25rem;
  max-width: 26ch;
}

/* --------------------------------------------------------------------------
 * Split: two columns of related detail
 * ----------------------------------------------------------------------- */

.split {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  margin-top: 2.5rem;
}

@media (min-width: 46rem) {
  .split { grid-template-columns: 1fr 1fr; }
}

.split > div { min-width: 0; }

.split p { color: var(--ink-soft); margin: 0; }

.split-head {
  margin: 0 0 0.9rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* --------------------------------------------------------------------------
 * Marked lists
 * ----------------------------------------------------------------------- */

.ticks, .crosses {
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--ink-soft);
}

.ticks li, .crosses li {
  position: relative;
  padding: 0 0 0.7rem 1.6rem;
  font-size: 0.9375rem;
}

.ticks li::before, .crosses li::before {
  position: absolute;
  left: 0;
  font-family: var(--mono);
  font-size: 0.8rem;
}

.ticks li::before { content: '\2713'; color: var(--label-ink); }
.crosses li::before { content: '\00d7'; color: var(--ink-dim); }

/* --------------------------------------------------------------------------
 * Spec: term and gloss, like a key on a drawing
 * ----------------------------------------------------------------------- */

.spec {
  margin: 2.25rem 0;
  border-top: 1px solid var(--rule);
}

.spec > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1.25rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--rule);
}

.spec code {
  min-width: 7rem;
  color: var(--label-ink);
  background: none;
  padding: 0;
  font-size: 0.875rem;
}

.spec span { color: var(--ink-soft); font-size: 0.9375rem; }

/* --------------------------------------------------------------------------
 * Cuts: the least-privilege reductions
 * ----------------------------------------------------------------------- */

.cuts {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

@media (min-width: 46rem) { .cuts { grid-template-columns: 1fr 1fr; } }

.cuts li {
  background: var(--abyss);
  padding: 1.1rem 1.25rem;
  color: var(--ink-soft);
  font-size: 0.9375rem;
  transition: background 0.3s var(--ease);
}

.cuts li:hover { background: var(--deep); }

.cuts b {
  display: block;
  margin-bottom: 0.3rem;
  color: var(--ink);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
 * Steps
 * ----------------------------------------------------------------------- */

.steps {
  counter-reset: step;
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding: 1.4rem 0 1.4rem 3.75rem;
  border-top: 1px solid var(--rule);
}

.steps li:last-child { border-bottom: 1px solid var(--rule); }

.steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0; top: 1.4rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--label-ink);
  border: 1px solid color-mix(in srgb, var(--water) 35%, transparent);
  padding: 0.2rem 0.45rem;
}

.steps h3 { margin-bottom: 0.35rem; }
.steps p { margin: 0; color: var(--ink-soft); max-width: var(--measure); }

/* --------------------------------------------------------------------------
 * Migration options: a plain numbered list, no station markers
 * ----------------------------------------------------------------------- */

/* Matches .split-head, rule included. */
.migrate-head {
  margin: 2rem 0 0.9rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.migrate-intro {
  margin: 0 0 0.9rem;
  max-width: var(--measure);
}

.migrate {
  margin: 0;
  padding-left: 1.4rem;
  max-width: var(--measure);
  color: var(--ink-soft);
}

.migrate li { margin-bottom: 0.55rem; }
.migrate li::marker { color: var(--label-ink); font-weight: 600; }

/* --------------------------------------------------------------------------
 * Log screenshots
 *
 * Rendered from the text in src/logs/ by src/bin/render-log-shots.bash. They
 * are images rather than styled markup because a terminal is what an operator
 * actually looks at, and green-on-black inside a light page reads as a
 * different surface, which is the point.
 * ----------------------------------------------------------------------- */

.logshot {
  margin: 2rem 0;
}

.logshot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
}

.logshot figcaption {
  margin-top: 0.6rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* --------------------------------------------------------------------------
 * Docs list
 * ----------------------------------------------------------------------- */

.docs-list {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  border-top: 1px solid var(--rule);
  max-width: 58rem;
}

.docs-list li { border-bottom: 1px solid var(--rule); }

.docs-list a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.85rem;
  padding: 1.15rem 0 0.3rem;
  font-family: var(--body);
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--ink);
  text-decoration: none;
}

/* The path, so it is obvious which file you are about to open. */
.docs-list a span {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--ink-dim);
}

.docs-list a::after {
  content: '\2197';
  margin-left: auto;
  color: var(--label-ink);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}

.docs-list a:hover,
.docs-list a:focus-visible { color: var(--label-ink); }
.docs-list a:hover::after,
.docs-list a:focus-visible::after { opacity: 1; transform: none; }

.docs-list p {
  margin: 0;
  padding-bottom: 1.15rem;
  color: var(--ink-soft);
  font-size: 0.9375rem;
  max-width: var(--measure);
}

/* A bare code box inside a docs entry. No chrome bar: the entry above already
 * says what it is, so a header would only repeat it. */
.snip {
  margin: 0 0 1.15rem;
  border: 1px solid var(--rule);
  background: var(--deep);
}

.snip pre {
  margin: 0;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--ink);
}

.snip .p { color: var(--label-ink); user-select: none; }
.snip .s { color: var(--label-ink); }
.snip .v { color: var(--ink-soft); }

/* --------------------------------------------------------------------------
 * Terminal
 * ----------------------------------------------------------------------- */

.terminal {
  /* The prose that follows a terminal block is a continuation of it, so the two
   * sit tight together. The space is all above. */
  margin: 2rem 0 0;
  border: 1px solid var(--rule);
  background: var(--deep);
  overflow: hidden;
  max-width: 54rem;
}

/* First paragraph after a terminal block sits directly under it. */
.terminal + p { margin-top: 0.9rem; }

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--rule);
  background: color-mix(in srgb, var(--abyss) 55%, var(--deep));
}

.terminal-bar span {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--ink-dim) 45%, transparent);
}

.terminal-bar b {
  margin-left: auto;
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.terminal pre {
  margin: 0;
  padding: 1.25rem 1.1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--ink);
}

.terminal .c { color: var(--ink-dim); }
.terminal .p { color: var(--label-ink); user-select: none; }
.terminal .s { color: var(--label-ink); }
.terminal .v { color: var(--ink-dim); }

/* --------------------------------------------------------------------------
 * Footer
 * ----------------------------------------------------------------------- */

/*
 * --deep, not a mix down towards black. Mixing --abyss with #000 only works in
 * the dark theme; in light --abyss is pale, so the bar came out mid grey with
 * mid grey text on it and was unreadable.
 */
.footer {
  border-top: 1px solid var(--rule);
  background: var(--deep);
}

.footer-in {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  max-width: 82rem;
  margin: 0 auto;
  padding: 1.75rem var(--gutter);
  font-size: 0.8125rem;
  color: var(--ink-dim);
}

@media (min-width: 68rem) {
  .footer-in { padding-left: var(--rail); padding-right: var(--rail); }
}

.footer p { margin: 0; }

.stamp {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.stamp span { color: var(--label-ink); }

/* --------------------------------------------------------------------------
 * Motion
 *
 * One orchestrated load for the hero, then a single reveal per bay on scroll.
 * .ready is set by site.js so nothing is stuck hidden if the script fails.
 * ----------------------------------------------------------------------- */

@media (prefers-reduced-motion: no-preference) {
  .ready .bay-hero > * {
    animation: rise 0.75s var(--ease) backwards;
  }
  /* Plate first, wordmark a beat later: the same order the eye reads them. */
  .ready .bay-hero .plate { animation-delay: 0.05s; }
  .ready .bay-hero .hero-title { animation-delay: 0.22s; }

  .ready .bay:not(.bay-hero) .bay-body {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  }
  .ready .bay.seen .bay-body { opacity: 1; transform: none; }

  @keyframes rise {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: none; }
  }
}