/* Keel Linux project site. Plain CSS, system fonts, no build step.
   Colours: the brand's navy and waterline blue (handbook docs/brand), the
   site's text navy #0B1F3A and off-white #F4F7FA, and teal for the mesh. */

:root {
  color-scheme: light dark;

  --navy: #0B1F3A;
  --brand-navy: #0B2847;
  --waterline: #0072C9;
  --teal: #16A6A0;
  --offwhite: #F4F7FA;

  --bg: #F7F9FC;
  --bg-alt: #EDF2F8;
  --surface: #FFFFFF;
  --surface-2: #F2F6FA;
  --fg: var(--navy);
  --muted: #44576F;
  --faint: #55667E;
  --line: #D6DFE9;
  --line-strong: #B9C7D6;
  --accent: var(--waterline);
  --accent-text: #005A9E;
  --accent-soft: #E3F0FB;
  --mesh: #0A6B66;
  --mesh-soft: #DDF3F1;
  --warn: #8A5300;
  --warn-soft: #FDF1DC;
  --stop: #B42318;
  --plate: var(--offwhite);
  --btn-bg: var(--navy);
  --btn-fg: var(--offwhite);
  --code-bg: #E8EEF5;
  --term-bg: #0B1B30;
  --term-fg: #D9E4F0;
  --focus: #005A9E;
  --shadow: 0 1px 2px rgb(11 31 58 / 6%), 0 8px 24px rgb(11 31 58 / 6%);
  --shadow-lg: 0 2px 4px rgb(11 31 58 / 6%), 0 24px 48px rgb(11 31 58 / 10%);

  --gutter: 24px;
  --wrap: 1200px;
  --measure: 64ch;
  --radius: 14px;
  --radius-sm: 8px;
  --header-h: 64px;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Liberation Mono",
    "DejaVu Sans Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #07182B;
    --bg-alt: #0A1F37;
    --surface: #0E2540;
    --surface-2: #112C4B;
    --fg: #EEF3F8;
    --muted: #AFBED0;
    --faint: #93A5BB;
    --line: #1F3D63;
    --line-strong: #2C5382;
    --accent: #4DA8F0;
    --accent-text: #7DC0F5;
    --accent-soft: #12355A;
    --mesh: #3CCBC4;
    --mesh-soft: #0F3B45;
    --warn: #F2C36B;
    --warn-soft: #3A2C12;
    --stop: #FF8A7A;
    --btn-bg: #4DA8F0;
    --btn-fg: #06172A;
    --code-bg: #15365C;
    --term-bg: #050F1D;
    --focus: #7DC0F5;
    --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px rgb(0 0 0 / 25%);
    --shadow-lg: 0 2px 4px rgb(0 0 0 / 30%), 0 24px 48px rgb(0 0 0 / 35%);
  }
}

:root[data-theme="dark"] {
  --bg: #07182B;
  --bg-alt: #0A1F37;
  --surface: #0E2540;
  --surface-2: #112C4B;
  --fg: #EEF3F8;
  --muted: #AFBED0;
  --faint: #93A5BB;
  --line: #1F3D63;
  --line-strong: #2C5382;
  --accent: #4DA8F0;
  --accent-text: #7DC0F5;
  --accent-soft: #12355A;
  --mesh: #3CCBC4;
  --mesh-soft: #0F3B45;
  --warn: #F2C36B;
  --warn-soft: #3A2C12;
  --stop: #FF8A7A;
  --btn-bg: #4DA8F0;
  --btn-fg: #06172A;
  --code-bg: #15365C;
  --term-bg: #050F1D;
  --focus: #7DC0F5;
  --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px rgb(0 0 0 / 25%);
  --shadow-lg: 0 2px 4px rgb(0 0 0 / 30%), 0 24px 48px rgb(0 0 0 / 35%);
}

/* Base */

[hidden] { display: none !important; }

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

html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 16px); }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", "Liberation Sans", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--accent-text); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }

code, pre, kbd { font-family: var(--mono); }
code {
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.1em 0.38em;
  border-radius: 0.3em;
  overflow-wrap: anywhere;
}

h1, h2, h3, h4 { line-height: 1.15; margin: 0 0 0.5em; letter-spacing: -0.02em; font-weight: 750; }
h1 { font-size: clamp(2.2rem, 1.5rem + 2.6vw, 3.5rem); letter-spacing: -0.035em; }
h2 { font-size: clamp(1.75rem, 1.35rem + 1.6vw, 2.6rem); letter-spacing: -0.03em; }
h3 { font-size: 1.2rem; letter-spacing: -0.01em; }
h4 { font-size: 1rem; letter-spacing: 0; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.25em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.skip {
  position: absolute; left: 12px; top: -64px; z-index: 100;
  background: var(--btn-bg); color: var(--btn-fg);
  padding: 0.6rem 1rem; border-radius: var(--radius-sm); font-weight: 650;
}
.skip:focus { top: 12px; }

.sr-only {
  position: absolute !important; width: 1px; height: 1px; margin: -1px;
  padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Header */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: 1rem; min-height: var(--header-h); }

.brand {
  display: inline-flex; align-items: center; gap: 0.6rem;
  color: var(--fg); text-decoration: none; font-weight: 700; font-size: 1.05rem;
  margin-right: auto; white-space: nowrap;
}
.brand img { width: 2rem; height: 2rem; background: var(--plate); border-radius: 0.4rem; padding: 2px; }

.site-nav ul { display: flex; flex-wrap: wrap; gap: 0.25rem; list-style: none; margin: 0; padding: 0; }
.site-nav a {
  display: block; padding: 0.45rem 0.7rem; border-radius: var(--radius-sm);
  color: var(--muted); text-decoration: none; font-size: 0.95rem; font-weight: 550;
}
.site-nav a:hover { color: var(--fg); background: var(--surface-2); }
.site-nav a[aria-current="page"] { color: var(--fg); background: var(--accent-soft); }

.icon-btn {
  display: inline-grid; place-items: center; width: 40px; height: 40px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--surface);
  color: var(--fg); cursor: pointer; padding: 0;
}
.icon-btn:hover { border-color: var(--line-strong); }
.icon-btn svg { width: 20px; height: 20px; }
.nav-toggle { display: none; }

@media (max-width: 900px) {
  .js .nav-toggle { display: inline-grid; }
  .js .site-nav {
    position: absolute; left: 0; right: 0; top: 100%;
    background: var(--bg); border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-lg); display: none;
  }
  .js .site-nav.is-open { display: block; }
  .js .site-nav ul { flex-direction: column; padding: 0.5rem var(--gutter) 1rem; }
  .js .site-nav a { padding: 0.75rem 0.5rem; font-size: 1rem; }
  html:not(.js) .site-header .wrap { flex-wrap: wrap; padding-bottom: 0.5rem; }
}

/* Buttons, chips, badges */

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.8rem 1.25rem; border-radius: 10px; font-weight: 650; font-size: 1rem;
  text-decoration: none; border: 1px solid transparent; line-height: 1.2;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn-primary { background: var(--btn-bg); color: var(--btn-fg); box-shadow: var(--shadow); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.btn-ghost { color: var(--fg); border-color: var(--line-strong); background: var(--surface); }
.btn-ghost:hover { border-color: var(--accent); }
.btn svg { width: 18px; height: 18px; }

.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; list-style: none; margin: 0; padding: 0; }
.chip {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.3rem 0.75rem; border-radius: 999px; font-size: 0.85rem; font-weight: 600;
  background: var(--surface); border: 1px solid var(--line); color: var(--muted);
}
.chip::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--mesh); }

.badge {
  display: inline-flex; align-items: center; gap: 0.35rem; white-space: nowrap;
  padding: 0.2rem 0.6rem; border-radius: 999px; font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.01em; background: var(--surface-2); color: var(--muted);
}
.badge::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.badge-live { background: var(--mesh-soft); color: var(--mesh); }
.badge-partial { background: var(--warn-soft); color: var(--warn); }
.badge-decided { background: var(--accent-soft); color: var(--accent-text); }
.badge-goal { background: var(--surface-2); color: var(--muted); }

.eyebrow {
  display: inline-block; font-size: 0.8rem; font-weight: 750; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--accent-text); margin-bottom: 0.9rem;
}
.lead { font-size: clamp(1.1rem, 1rem + 0.35vw, 1.3rem); color: var(--muted); max-width: var(--measure); }

/* Sections */

.section { padding: clamp(64px, 5rem + 2vw, 112px) 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 760px; margin-bottom: clamp(2rem, 1.5rem + 1.5vw, 3.25rem); }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .lead { margin-left: auto; margin-right: auto; }

.grid { display: grid; gap: 1.25rem; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 1000px) { .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 680px) { .grid-2, .grid-3 { grid-template-columns: minmax(0, 1fr); } }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem; box-shadow: var(--shadow); min-width: 0;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
a.card { color: inherit; text-decoration: none; display: block; }
a.card:hover, .card.lift:hover { transform: translateY(-3px); border-color: var(--line-strong); box-shadow: var(--shadow-lg); }
.card h3 { margin-top: 0.9rem; }
.card p { color: var(--muted); }
.card p:last-child { margin-bottom: 0; }
ul.grid { list-style: none; padding: 0; margin: 0; }

.card-top { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; flex-wrap: wrap; }
.icon {
  display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 12px;
  background: var(--accent-soft); color: var(--accent-text);
}
.icon svg { width: 22px; height: 22px; }
.refs { margin-top: 1rem; font-size: 0.85rem; color: var(--faint); display: flex; flex-wrap: wrap; gap: 0.4rem 0.75rem; }
.refs a { color: var(--faint); }
.refs a:hover { color: var(--accent-text); }

/* Hero */

.hero { position: relative; padding: clamp(48px, 4rem + 3vw, 120px) 0 clamp(56px, 4rem + 2vw, 104px); overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(60% 60% at 85% 20%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%),
    radial-gradient(50% 50% at 10% 90%, color-mix(in srgb, var(--mesh) 12%, transparent), transparent 70%);
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: clamp(2rem, 4vw, 4rem); align-items: center; }
@media (max-width: 960px) { .hero-grid { grid-template-columns: minmax(0, 1fr); } }
.hero h1 { margin-bottom: 0.4em; }
.hero h1 .accent { color: var(--accent-text); }
.hero .promise { font-size: clamp(1.15rem, 1rem + 0.6vw, 1.45rem); font-weight: 600; margin-bottom: 0.9rem; }
.hero .sub { color: var(--muted); max-width: 60ch; }
.hero .chips { margin: 1.5rem 0 2rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.status-pill {
  display: inline-flex; align-items: center; gap: 0.5rem; margin-bottom: 1.5rem;
  padding: 0.35rem 0.85rem 0.35rem 0.4rem; border-radius: 999px; font-size: 0.87rem; font-weight: 600;
  background: var(--surface); border: 1px solid var(--line); color: var(--muted); text-decoration: none;
}
.status-pill strong { background: var(--warn-soft); color: var(--warn); padding: 0.1rem 0.55rem; border-radius: 999px; font-size: 0.78rem; }
.status-pill:hover { border-color: var(--line-strong); color: var(--fg); }

.mesh-panel {
  position: relative; border-radius: 20px; border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  box-shadow: var(--shadow-lg); overflow: hidden;
}
.panel-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 0.5rem;
  padding: 0.7rem 1rem; border-bottom: 1px solid var(--line);
  font: 600 0.8rem/1.2 var(--mono); color: var(--faint);
}
.panel-bar .dots { display: inline-flex; gap: 6px; }
.panel-bar .dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-strong); }
.mesh-stage { position: relative; aspect-ratio: 5 / 4; }
.mesh-stage canvas { width: 100%; height: 100%; }
.mesh-legend {
  display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; padding: 0.75rem 1rem;
  border-top: 1px solid var(--line); font-size: 0.8rem; color: var(--faint); list-style: none; margin: 0;
}
.mesh-legend li { display: inline-flex; align-items: center; gap: 0.4rem; }
.mesh-legend i { width: 18px; height: 0; border-top: 2px solid var(--mesh); }
.mesh-legend i.nat { border-top-style: dashed; border-color: var(--accent); }
.mesh-legend i.dot { width: 8px; height: 8px; border: 0; border-radius: 50%; background: var(--accent); }

/* Page hero for inner pages */

.page-hero { padding: clamp(48px, 3rem + 3vw, 96px) 0 clamp(32px, 2rem + 2vw, 64px); position: relative; overflow: hidden; }
.page-hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(50% 80% at 90% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 70%);
}
.page-hero h1 { font-size: clamp(2rem, 1.4rem + 2.6vw, 3.4rem); max-width: 20ch; }
.crumbs { font-size: 0.9rem; color: var(--faint); margin-bottom: 1rem; }
.crumbs a { color: var(--faint); }

/* Layout with an in-page contents column */

.doc { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: clamp(2rem, 4vw, 4rem); align-items: start; }
@media (max-width: 960px) { .doc { grid-template-columns: minmax(0, 1fr); } }
.toc { position: sticky; top: calc(var(--header-h) + 24px); font-size: 0.92rem; }
.toc h2 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--faint); margin-bottom: 0.75rem; }
.toc ol { list-style: none; padding: 0; margin: 0; border-left: 2px solid var(--line); }
.toc a { display: block; padding: 0.3rem 0 0.3rem 1rem; margin-left: -2px; border-left: 2px solid transparent; color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--fg); }
.toc a.is-active { color: var(--accent-text); border-left-color: var(--accent); font-weight: 600; }
@media (max-width: 960px) {
  .toc { position: static; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.25rem; }
}

.prose { min-width: 0; }
.prose > section { padding-bottom: clamp(2.5rem, 2rem + 2vw, 4rem); margin-bottom: clamp(2.5rem, 2rem + 2vw, 4rem); border-bottom: 1px solid var(--line); }
.prose > section:last-child { border-bottom: 0; margin-bottom: 0; }
.prose h2 { font-size: clamp(1.5rem, 1.25rem + 1vw, 2.1rem); }
.prose h3 { margin-top: 1.75rem; }
.prose p, .prose li { max-width: var(--measure); }
.prose li { margin-bottom: 0.4em; }
.prose .grid { margin: 1.5rem 0; }

.callout {
  border: 1px solid var(--line); border-left: 4px solid var(--accent); background: var(--surface);
  border-radius: var(--radius-sm); padding: 1rem 1.25rem; margin: 1.5rem 0; max-width: 72ch;
}
.callout.warn { border-left-color: var(--warn); }
.callout p:last-child { margin-bottom: 0; }
.callout strong:first-child { display: block; margin-bottom: 0.25rem; }

/* Tables */

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); margin: 1.25rem 0; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 0.7rem 0.9rem; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: var(--surface-2); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); white-space: nowrap; }
tbody tr:last-child td, tbody tr:last-child th { border-bottom: 0; }
tbody th { font-weight: 650; }
.state { font: 600 0.82rem var(--mono); padding: 0.1rem 0.45rem; border-radius: 6px; white-space: nowrap; }
.state-on { background: var(--mesh-soft); color: var(--mesh); }
.state-off { background: var(--surface-2); color: var(--muted); }

/* Code blocks */

pre.code {
  background: var(--term-bg); color: var(--term-fg); border-radius: var(--radius-sm);
  padding: 1rem 1.2rem; overflow-x: auto; font-size: 0.85rem; line-height: 1.6; margin: 1.25rem 0;
  border: 1px solid var(--line);
}
pre.code .c { color: #8FA3BA; }
pre.code .k { color: #7DC0F5; }
pre.code .s { color: #7EE0C3; }

/* Composition diagram */

.compose {
  display: grid; grid-template-columns: minmax(0, 1.25fr) 120px minmax(0, 1fr);
  gap: 0; align-items: stretch; margin-top: 1rem;
}
.stack, .services { display: flex; flex-direction: column; gap: 0.6rem; list-style: none; margin: 0; padding: 0; }
.stack-title, .services-title { font-size: 0.78rem; font-weight: 750; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); margin: 0 0 0.75rem; }
.layer {
  position: relative; border-radius: 12px; padding: 0.9rem 1.1rem; border: 1px solid var(--line);
  background: var(--surface); box-shadow: var(--shadow);
}
.layer strong { display: block; font-size: 1.02rem; }
.layer span { display: block; font-size: 0.88rem; color: var(--muted); }
.layer em { font-style: normal; font-family: var(--mono); font-size: 0.78rem; color: var(--faint); }
.layer-app { margin: 0 12%; border-top: 3px solid #7B61FF; }
.layer-runtime { margin: 0 8%; border-top: 3px solid var(--mesh); }
.layer-web { margin: 0 4%; border-top: 3px solid var(--accent); }
.layer-core { border-top: 3px solid var(--fg); background: var(--surface-2); }
.service { border-left: 3px solid var(--accent); }
.mesh-link { position: relative; display: grid; place-items: center; }
.mesh-link::before {
  content: ""; position: absolute; left: 12px; right: 12px; top: 50%; height: 2px;
  background: repeating-linear-gradient(90deg, var(--mesh) 0 8px, transparent 8px 14px);
}
.mesh-link span {
  position: relative; background: var(--mesh-soft); color: var(--mesh); border: 1px solid var(--mesh);
  font: 700 0.72rem/1.25 var(--mono); padding: 0.35rem 0.5rem; border-radius: 8px; text-align: center;
}
.mesh-link .flow {
  position: absolute; top: calc(50% - 4px); left: 12px; width: 8px; height: 8px; border-radius: 50%;
  background: var(--mesh); box-shadow: 0 0 0 4px color-mix(in srgb, var(--mesh) 25%, transparent);
}
@media (prefers-reduced-motion: no-preference) {
  .mesh-link .flow { animation: flow 2.6s linear infinite; }
  .mesh-link .flow.two { animation-delay: 1.3s; animation-direction: reverse; }
}
@keyframes flow { from { left: 12px; } to { left: calc(100% - 20px); } }
.compose-note { margin-top: 1.25rem; font-size: 0.92rem; color: var(--faint); max-width: 80ch; }
@media (max-width: 760px) {
  .compose { grid-template-columns: minmax(0, 1fr); }
  .mesh-link { height: 72px; }
  .mesh-link::before { left: 50%; right: auto; top: 6px; bottom: 6px; width: 2px; height: auto;
    background: repeating-linear-gradient(180deg, var(--mesh) 0 8px, transparent 8px 14px); }
  .mesh-link .flow { display: none; }
  .layer-app, .layer-runtime, .layer-web { margin: 0; }
}

/* Installation modes */

.mode .nodes { display: flex; gap: 0.5rem; margin: 0.25rem 0 1rem; flex-wrap: wrap; }
.mode .node {
  display: grid; place-items: center; min-width: 58px; height: 40px; padding: 0 0.5rem; border-radius: 8px;
  font: 700 0.72rem var(--mono); background: var(--surface-2); border: 1px solid var(--line-strong); color: var(--muted);
}
.mode .node.primary { border-color: var(--accent); color: var(--accent-text); background: var(--accent-soft); }
.mode .node.voter { border-style: dashed; }
.mode ul { color: var(--muted); font-size: 0.95rem; margin-bottom: 0; }

/* Request pipeline */

.pipeline { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); overflow: hidden; }
.pipeline-stage { position: relative; }
.pipeline-stage canvas { width: 100%; height: 150px; }
.pipeline-steps { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); counter-reset: step; }
.pipeline-steps li { padding: 1.1rem 1rem; border-right: 1px solid var(--line); font-size: 0.9rem; color: var(--muted); counter-increment: step; }
.pipeline-steps li:last-child { border-right: 0; }
.pipeline-steps strong { display: block; color: var(--fg); font-size: 0.98rem; margin-bottom: 0.2rem; }
.pipeline-steps strong::before { content: counter(step) ". "; color: var(--accent-text); }
.pipeline-foot { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; padding: 0.75rem 1rem; border-top: 1px solid var(--line); font-size: 0.82rem; color: var(--faint); }
.pipeline-foot span { display: inline-flex; align-items: center; gap: 0.4rem; }
.pipeline-foot i { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.pipeline-foot .ok { background: var(--mesh); }
.pipeline-foot .ban { background: var(--stop); }
.pipeline-foot .waf { background: var(--warn); }
.pipeline-foot .pow { background: var(--accent); }
@media (max-width: 900px) {
  .pipeline-steps { grid-template-columns: minmax(0, 1fr); }
  .pipeline-steps li { border-right: 0; border-bottom: 1px solid var(--line); }
  .pipeline-steps li:last-child { border-bottom: 0; }
}

/* Terminal */

.terminal { border-radius: 16px; background: var(--term-bg); color: var(--term-fg); box-shadow: var(--shadow-lg); overflow: hidden; border: 1px solid #1C3354; }
.terminal .panel-bar { border-bottom-color: #1C3354; color: #8FA3BA; }
.terminal .panel-bar .dots i { background: #2A4468; }
.terminal pre { margin: 0; padding: 1.1rem 1.2rem 1.4rem; font-size: 0.8rem; line-height: 1.65; min-height: 31em; overflow-x: auto; white-space: pre-wrap; overflow-wrap: anywhere; }
.terminal .prompt { color: #7EE0C3; }
.terminal .cmd { color: #FFFFFF; font-weight: 600; }
.terminal .same { color: #8FA3BA; }
.terminal .drift { color: #F2C36B; }
.terminal .done { color: #7EE0C3; }
.terminal .note { color: #7D93AD; font-style: italic; }
.terminal .caret { display: inline-block; width: 0.6em; height: 1.1em; vertical-align: text-bottom; background: #7EE0C3; }
@media (prefers-reduced-motion: no-preference) { .terminal .caret { animation: blink 1s steps(1) infinite; } }
@keyframes blink { 50% { opacity: 0; } }
.terminal-tools { display: flex; justify-content: flex-end; }
.terminal-tools button {
  background: transparent; border: 1px solid #2A4468; color: #B8C7D8; border-radius: 6px;
  font: 600 0.75rem var(--mono); padding: 0.2rem 0.6rem; cursor: pointer;
}
.terminal-tools button:hover { color: #FFFFFF; border-color: #7DC0F5; }

/* Split feature rows */

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(2rem, 4vw, 4rem); align-items: center; }
.split.reverse > :first-child { order: 2; }
@media (max-width: 960px) { .split { grid-template-columns: minmax(0, 1fr); } .split.reverse > :first-child { order: 0; } }
.checks { list-style: none; padding: 0; margin: 1.25rem 0 0; }
.checks li { position: relative; padding-left: 1.9rem; margin-bottom: 0.75rem; color: var(--muted); }
.checks li strong { color: var(--fg); }
.checks li::before {
  content: ""; position: absolute; left: 0; top: 0.3em; width: 1.1rem; height: 1.1rem; border-radius: 50%;
  background: var(--mesh-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='%230A6B66' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 80% no-repeat;
}

/* Layers and measurements */

.manifest-card { font: 0.84rem/1.8 var(--mono); }
.manifest-card .row { display: flex; justify-content: space-between; gap: 1rem; border-bottom: 1px dashed var(--line); padding: 0.2rem 0; }
.manifest-card .row:last-child { border-bottom: 0; }
.manifest-card .sig { color: var(--mesh); font-weight: 700; }
.bars { list-style: none; margin: 0; padding: 0; }
.bars li { margin-bottom: 1.1rem; }
.bars .label { margin: 0 0 0.35rem; display: flex; justify-content: space-between; gap: 1rem; font-size: 0.93rem; margin-bottom: 0.35rem; }
.bars .label span:last-child { font-weight: 700; font-variant-numeric: tabular-nums; }
.bars .track { display: block; height: 10px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--line); overflow: hidden; }
.bars .fill { display: block; height: 100%; width: var(--w); border-radius: 999px; background: linear-gradient(90deg, var(--accent), var(--mesh)); }
.bars .fill.slow { background: var(--line-strong); }
.js-motion .bars .fill { width: 0; transition: width 1.1s cubic-bezier(.2, .7, .2, 1); }
.js-motion .is-in .bars .fill, .js-motion .bars.is-in .fill { width: var(--w); }
.hint { font-size: 0.88rem; color: var(--faint); }

/* Standards */

.standards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: 1.25rem; list-style: none; margin: 0; padding: 0; }
.standards li { border-top: 2px solid var(--fg); padding-top: 1rem; }
.standards strong { display: block; font-size: 1.05rem; margin-bottom: 0.35rem; }
.standards p { color: var(--muted); margin: 0; }

/* Status and roadmap */

.status-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 4vw, 4rem); }
@media (max-width: 860px) { .status-grid { grid-template-columns: minmax(0, 1fr); } }
.focus-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.75rem; }
.focus-list li { display: flex; gap: 1rem; align-items: flex-start; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 1rem 1.1rem; }
.focus-list .num { flex: none; font: 700 0.8rem var(--mono); color: var(--accent-text); background: var(--accent-soft); border-radius: 6px; padding: 0.2rem 0.45rem; }
.focus-list p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.focus-list strong { display: block; color: var(--fg); }

.phases { list-style: none; margin: 0; padding: 0; position: relative; }
.phases::before { content: ""; position: absolute; left: 19px; top: 8px; bottom: 8px; width: 2px; background: var(--line); }
.phase { position: relative; padding-left: 60px; margin-bottom: 1.5rem; }
.phase-dot {
  position: absolute; left: 0; top: 1.4rem; width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center; font: 700 0.85rem var(--mono);
  background: var(--surface); border: 2px solid var(--line-strong); color: var(--muted);
}
.phase.is-current .phase-dot { border-color: var(--accent); color: var(--accent-text); background: var(--accent-soft); }
.phase .card { padding: 1.4rem 1.5rem; }
.phase h2 { font-size: 1.35rem; margin: 0; }
.phase-head { display: flex; justify-content: space-between; align-items: center; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 0.75rem; }
.progress { display: flex; align-items: center; gap: 0.6rem; font-size: 0.82rem; color: var(--faint); font-variant-numeric: tabular-nums; }
.progress .track { display: block; width: 120px; height: 8px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--line); overflow: hidden; }
.progress .fill { display: block; height: 100%; width: var(--w); background: var(--mesh); }
.tasks { list-style: none; padding: 0; margin: 0 0 1rem; }
.tasks li { position: relative; padding-left: 1.8rem; margin-bottom: 0.45rem; color: var(--muted); font-size: 0.97rem; }
.tasks li::before {
  content: ""; position: absolute; left: 0; top: 0.28em; width: 1.05rem; height: 1.05rem; border-radius: 4px;
  border: 2px solid var(--line-strong); background: var(--surface);
}
.tasks li.done { color: var(--fg); }
.tasks li.done::before {
  border-color: var(--mesh); background: var(--mesh) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='white' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 90% no-repeat;
}
.done-when { font-size: 0.93rem; background: var(--surface-2); border-radius: var(--radius-sm); padding: 0.75rem 1rem; color: var(--muted); }
.done-when strong { color: var(--fg); }
.filters { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.filters button {
  font: 600 0.88rem/1 system-ui, sans-serif; padding: 0.55rem 0.9rem; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line-strong); background: var(--surface); color: var(--muted);
}
.filters button[aria-pressed="true"] { background: var(--btn-bg); color: var(--btn-fg); border-color: var(--btn-bg); }
.tasks.only-open li.done, .tasks.only-done li:not(.done) { display: none; }

/* CTA band */

.cta { border-radius: 24px; padding: clamp(2rem, 1.5rem + 3vw, 4rem); background: linear-gradient(135deg, var(--navy), #123A66); color: #EEF3F8; position: relative; overflow: hidden; }
.cta h2 { color: #FFFFFF; max-width: 22ch; }
.cta p { color: #C6D4E4; max-width: 60ch; }
.cta .btn-primary { background: #FFFFFF; color: var(--navy); }
.cta .btn-ghost { background: transparent; color: #FFFFFF; border-color: rgb(255 255 255 / 40%); }
.cta a:not(.btn) { color: #9DD0F7; }

/* Guidelines */

.guide h2 { margin-top: 2.5rem; font-size: 1.5rem; }
.guide h2:first-child { margin-top: 0; }
.swatches { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr)); gap: 1rem; list-style: none; padding: 0; margin: 1rem 0 1.5rem; }
.swatches li { border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; background: var(--surface); }
.swatches .chip-color { display: block; height: 64px; background: var(--c); }
.swatches p { margin: 0; padding: 0.6rem 0.8rem; font-size: 0.88rem; }
.swatches code { background: none; padding: 0; }
.mark-row { display: flex; flex-wrap: wrap; gap: 1rem; margin: 1rem 0; }
.mark-row figure { margin: 0; background: var(--plate); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 1rem; }
.mark-row figure.dark { background: var(--navy); }
.mark-row img { width: 96px; height: 96px; }

/* Footer */

.site-footer { border-top: 1px solid var(--line); background: var(--bg-alt); padding: 3.5rem 0 2rem; font-size: 0.93rem; color: var(--muted); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) repeat(2, minmax(0, 1fr)); gap: 2rem; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: minmax(0, 1fr); } }
.site-footer h2 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--faint); margin-bottom: 0.9rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 0.45rem; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--fg); text-decoration: underline; }
.site-footer .brand { margin-bottom: 0.75rem; }
.legal { border-top: 1px solid var(--line); margin-top: 2.5rem; padding-top: 1.5rem; font-size: 0.85rem; color: var(--faint); }

/* Scroll reveal: only when scripts run and motion is welcome */

.js-motion [data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(.2, .7, .2, 1); }
.js-motion [data-reveal].is-in { opacity: 1; transform: none; }
.js-motion [data-reveal-delay="1"] { transition-delay: 0.08s; }
.js-motion [data-reveal-delay="2"] { transition-delay: 0.16s; }
.js-motion [data-reveal-delay="3"] { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}

@media (max-width: 560px) {
  :root { --gutter: 16px; }
  .card { padding: 1.25rem; }
  .btn { width: 100%; justify-content: center; }
  .terminal pre { font-size: 0.7rem; }
}

@media print {
  .site-header, .mesh-panel, .pipeline-stage, .terminal-tools { display: none; }
}