/* ─────────────────────────────────────────────
   SIMPE-MS · Local Setup Documentation
   Design system — editorial-technical
   ───────────────────────────────────────────── */

:root {
  /* Type ────────────── */
  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;

  /* Color: warm paper and deep ink ────────────── */
  --paper: #f3ecdc;
  --paper-shadow: #ebe2cd;
  --paper-deep: #e3d8bf;
  --ink: #1c1812;
  --ink-soft: #4a3d2c;
  --ink-mute: #76664f;
  --rule: #c5b89c;
  --rule-soft: #d8ccb1;

  /* Accents ────────────── */
  --oxblood: #7a2e1f;
  --oxblood-soft: #b04a35;
  --amber: #c98a2b;
  --teal: #2a5854;
  --olive: #7a7d3a;

  /* Layout ────────────── */
  --max-content: 38rem;
  --measure: 64ch;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --sidebar-w: 17rem;

  --shadow-paper: 0 1px 0 rgba(28, 24, 18, 0.04), 0 0.5px 0 rgba(28, 24, 18, 0.08) inset;

  color-scheme: light;
}

/* Reset ────────────── */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  background-image:
    radial-gradient(circle at 20% 12%, rgba(122, 46, 31, 0.03) 0%, transparent 40%),
    radial-gradient(circle at 80% 85%, rgba(42, 88, 84, 0.025) 0%, transparent 50%);
  background-attachment: fixed;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Subtle paper grain overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.35;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 240 240' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.95' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.11 0 0 0 0 0.09 0 0 0 0 0.07 0 0 0 0.04 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* Skip link ────────────── */
.skip {
  position: absolute;
  left: 1rem;
  top: 1rem;
  padding: 0.5rem 0.75rem;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-150%);
  transition: transform 0.2s;
  z-index: 100;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}
.skip:focus { transform: translateY(0); }

/* Selection ────────────── */
::selection {
  background: var(--ink);
  color: var(--paper);
}

/* ─── MASTHEAD ─────────────────────────── */
.masthead {
  border-bottom: 1px solid var(--rule);
  padding: 1.25rem var(--gutter);
  position: relative;
  z-index: 10;
  background: var(--paper);
}
.masthead-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.masthead-logo {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  font-family: var(--font-display);
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  font-variation-settings: "opsz" 144;
  line-height: 1;
  position: relative;
  top: 0.3rem;
  letter-spacing: -0.02em;
}
.logo-text {
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  font-variation-settings: "opsz" 24;
}
.logo-text strong {
  font-weight: 700;
}
.masthead-meta {
  display: flex;
  gap: 0.5rem;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-mute);
}
.masthead-meta b {
  color: var(--ink);
  font-weight: 500;
}

/* ─── LAYOUT ─────────────────────────── */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  z-index: 5;
  min-height: calc(100vh - 5rem);
}

/* ─── SIDEBAR ─────────────────────────── */
.sidebar {
  border-right: 1px solid var(--rule);
  padding: 3rem 2rem 4rem 0;
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow-y: auto;
}
.sidebar-inner {
  padding-right: 1.5rem;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--ink-mute);
  margin-bottom: 1.5rem;
}

.back-home {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--ink-mute);
  margin-bottom: 1.5rem;
  transition: color 0.15s, transform 0.15s;
}
.back-home:hover {
  color: var(--oxblood);
}
.back-home::before {
  content: '←';
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1rem;
  transition: transform 0.15s;
}
.back-home:hover::before {
  transform: translateX(-3px);
}

.chapters {
  counter-reset: chapter;
}
.chapters li {
  counter-increment: chapter;
  border-top: 1px solid var(--rule-soft);
  padding: 0;
}
.chapters li:last-child {
  border-bottom: 1px solid var(--rule-soft);
}
.chapters a {
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  align-items: baseline;
  padding: 0.85rem 0;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 400;
  font-variation-settings: "opsz" 24;
  color: var(--ink-soft);
  transition: color 0.15s, background 0.15s;
  position: relative;
}
.chapters a::before {
  content: counter(chapter, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--ink-mute);
  letter-spacing: 0.05em;
  position: relative;
  top: -0.15em;
}
.chapters a:hover {
  color: var(--oxblood);
}
.chapters a:hover::before {
  color: var(--oxblood);
}
.chapters a.active {
  color: var(--ink);
  font-weight: 500;
}
.chapters a.active::before {
  color: var(--oxblood);
  font-weight: 700;
}
.chapters a.active::after {
  content: '';
  position: absolute;
  right: -1.5rem;
  top: 50%;
  width: 0.4rem;
  height: 0.4rem;
  background: var(--oxblood);
  transform: translateY(-50%) rotate(45deg);
}

.sidebar-foot {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule-soft);
  font-size: 0.78rem;
  color: var(--ink-mute);
  line-height: 1.5;
}
.sidebar-foot a {
  color: var(--oxblood);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* ─── MAIN CONTENT ─────────────────────────── */
main {
  padding: 4rem var(--gutter) 6rem;
  max-width: 100%;
  overflow-x: hidden;
}
article {
  max-width: var(--max-content);
  margin: 0 auto;
}

/* Page header ─────────── */
.page-header {
  margin-bottom: 4rem;
  padding-bottom: 2.5rem;
  border-bottom: 2px solid var(--ink);
  position: relative;
}
.kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--oxblood);
  margin-bottom: 1.5rem;
}
.kicker .num {
  display: inline-block;
  font-weight: 700;
}
.kicker .sep {
  display: inline-block;
  margin: 0 0.5rem;
  color: var(--ink-mute);
}

h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-variation-settings: "opsz" 144, "SOFT" 30;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 0.97;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-bottom: 1.25rem;
}
h1 em {
  font-style: italic;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  color: var(--oxblood);
}

.lede {
  font-family: var(--font-display);
  font-weight: 400;
  font-variation-settings: "opsz" 24;
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.45;
  color: var(--ink-soft);
  max-width: 38rem;
}

/* Section structure ─────────── */
h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-variation-settings: "opsz" 60;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin-top: 4rem;
  margin-bottom: 1.5rem;
  position: relative;
  padding-top: 2.5rem;
  border-top: 1px solid var(--rule);
}
h2 .num {
  position: absolute;
  top: 2.3rem;
  left: -3rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--oxblood);
  letter-spacing: 0.1em;
}

h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-variation-settings: "opsz" 24;
  font-size: 1.25rem;
  line-height: 1.3;
  margin-top: 2.5rem;
  margin-bottom: 0.85rem;
  color: var(--ink);
}

h4 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--ink-soft);
}

p, ul, ol {
  margin-bottom: 1.25rem;
  max-width: var(--measure);
}
p + h2, p + h3, ul + h2, ul + h3, ol + h2, ol + h3, pre + h2, pre + h3 {
  margin-top: 3rem;
}

/* Inline elements ─────────── */
strong { font-weight: 600; color: var(--ink); }
em { font-style: italic; }

a.link, p a, li a {
  color: var(--oxblood);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: var(--oxblood-soft);
  text-underline-offset: 3px;
  transition: text-decoration-thickness 0.1s;
}
a.link:hover, p a:hover, li a:hover {
  text-decoration-thickness: 2px;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--paper-deep);
  padding: 0.1em 0.35em;
  border-radius: 2px;
  color: var(--teal);
  font-weight: 500;
}

/* Lists ─────────── */
.body-list {
  padding-left: 1.5rem;
}
.body-list li {
  position: relative;
  padding-left: 0.5rem;
  margin-bottom: 0.65rem;
}
.body-list li::marker {
  color: var(--oxblood);
}
ul.body-list li {
  list-style: none;
  padding-left: 0;
}
ul.body-list li::before {
  content: '·';
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--oxblood);
  font-size: 1.5em;
  margin-right: 0.6em;
  line-height: 0;
  vertical-align: middle;
}

/* Code blocks (commands) ─────────── */
pre.cmd {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.6;
  background: #1c1812;
  color: #f0e5cc;
  padding: 1.1rem 1.35rem 1.1rem 2.5rem;
  margin: 1.5rem 0 2rem;
  position: relative;
  overflow-x: auto;
  border-left: 3px solid var(--oxblood);
  max-width: 100%;
}
pre.cmd::before {
  content: '$';
  position: absolute;
  left: 1rem;
  top: 1.1rem;
  color: var(--amber);
  font-weight: 500;
  user-select: none;
}
pre.cmd.multi::before {
  content: '';
}
pre.cmd .comment {
  color: #9a8c6c;
  font-style: italic;
}
pre.cmd .flag {
  color: #d4a44b;
}
pre.cmd .str {
  color: #b8c97f;
}
pre.cmd code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

pre.code {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.6;
  background: var(--paper-shadow);
  border: 1px solid var(--rule-soft);
  padding: 1.1rem 1.35rem;
  margin: 1.5rem 0 2rem;
  overflow-x: auto;
  color: var(--ink);
}
pre.code code {
  background: transparent;
  color: inherit;
  padding: 0;
}

.copy-btn {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  background: rgba(243, 236, 220, 0.08);
  color: var(--paper);
  border: 1px solid rgba(243, 236, 220, 0.18);
  padding: 0.25rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s;
}
pre.cmd:hover .copy-btn,
pre.code:hover .copy-btn {
  opacity: 1;
}
pre.code .copy-btn {
  background: var(--paper);
  color: var(--ink-soft);
  border-color: var(--rule);
}
.copy-btn:hover {
  background: rgba(243, 236, 220, 0.15);
}
pre.code .copy-btn:hover {
  background: var(--paper-deep);
}
.copy-btn.copied {
  background: var(--oxblood);
  color: var(--paper);
  border-color: var(--oxblood);
}

/* Tables ─────────── */
.table-wrap {
  margin: 1.75rem 0 2rem;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  overflow-x: auto;
  max-width: 100%;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.94rem;
}
th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 500;
  color: var(--ink-mute);
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--rule);
  vertical-align: bottom;
}
td {
  padding: 0.85rem;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
tbody tr:last-child td {
  border-bottom: 0;
}
td code {
  font-size: 0.84em;
}

/* Callouts ─────────── */
.callout {
  margin: 2rem 0;
  padding: 1.5rem 1.75rem;
  background: var(--paper-shadow);
  border-left: 3px solid var(--oxblood);
  position: relative;
  max-width: var(--measure);
}
.callout-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--oxblood);
  margin-bottom: 0.65rem;
  display: block;
  font-weight: 500;
}
.callout p:last-child { margin-bottom: 0; }
.callout--note { border-left-color: var(--teal); }
.callout--note .callout-label { color: var(--teal); }
.callout--warn { border-left-color: var(--amber); }
.callout--warn .callout-label { color: #a06b15; }

/* Stamp ─────────── */
.stamp {
  position: relative;
  display: inline-block;
  width: 7.5rem;
  height: 7.5rem;
  border: 2px solid var(--oxblood);
  border-radius: 50%;
  color: var(--oxblood);
  opacity: 0.85;
  transform: rotate(-8deg);
}
.stamp::before, .stamp::after {
  content: '';
  position: absolute;
  border: 1px solid var(--oxblood);
  border-radius: 50%;
}
.stamp::before {
  inset: 0.45rem;
}
.stamp::after {
  inset: 1.4rem;
}
.stamp svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.stamp-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.8rem;
  font-variation-settings: "opsz" 24;
  line-height: 1.05;
  font-weight: 600;
  z-index: 2;
  letter-spacing: 0.04em;
}

/* Page footer (prev / next nav) ─────────── */
.page-footer {
  margin-top: 5rem;
  padding-top: 2.5rem;
  border-top: 2px solid var(--ink);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.page-footer a {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1rem 0;
  border: 1px solid transparent;
  transition: color 0.15s;
}
.page-footer a:hover {
  color: var(--oxblood);
}
.page-footer .prev {
  align-items: flex-start;
}
.page-footer .next {
  align-items: flex-end;
  text-align: right;
}
.page-footer .label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
}
.page-footer .title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 500;
  font-variation-settings: "opsz" 60;
  line-height: 1;
}

/* Colophon ─────────── */
.colophon {
  border-top: 1px solid var(--rule);
  padding: 1.5rem var(--gutter);
  font-size: 0.78rem;
  color: var(--ink-mute);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  position: relative;
  z-index: 5;
}
.colophon a {
  color: var(--ink-soft);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.colophon a:hover { color: var(--oxblood); }

/* ─── HOMEPAGE COVER ─────────────────────────── */
.cover {
  padding: 4rem var(--gutter) 6rem;
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  z-index: 5;
  isolation: isolate;
}
.cover-meta {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: end;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 1.25rem;
  margin-bottom: 3rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
}
.cover-meta .vol {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-style: italic;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--ink-soft);
}
.cover-meta b {
  color: var(--ink);
  font-weight: 500;
}

.cover-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-variation-settings: "opsz" 144;
  font-size: clamp(4rem, 14vw, 11rem);
  line-height: 0.86;
  letter-spacing: -0.04em;
  color: var(--ink);
  margin-bottom: 1.5rem;
}
.cover-title em {
  font-style: italic;
  font-variation-settings: "opsz" 144, "SOFT" 100;
  color: var(--oxblood);
}
.cover-title .ampersand {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  color: var(--oxblood-soft);
  position: relative;
  font-size: 0.85em;
  margin: 0 0.05em;
}

.cover-sub {
  font-family: var(--font-display);
  font-style: italic;
  font-variation-settings: "opsz" 60;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  line-height: 1.4;
  color: var(--ink-soft);
  max-width: 38rem;
  margin-bottom: 4rem;
}

.cover-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 5rem;
  padding-top: 3rem;
  border-top: 1px solid var(--rule);
}
.cover-blurb p {
  font-size: 1.05rem;
  margin-bottom: 1rem;
  max-width: 32rem;
}
.cover-blurb p:first-child::first-line {
  font-variant: small-caps;
  letter-spacing: 0.05em;
}
.cover-blurb .dropcap {
  font-family: var(--font-display);
  font-weight: 700;
  font-variation-settings: "opsz" 144;
  font-size: 4.2rem;
  line-height: 0.85;
  float: left;
  margin: 0.05em 0.18em -0.05em 0;
  color: var(--oxblood);
}

.toc {
  position: relative;
}
.toc-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--ink-mute);
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.75rem;
}
.toc ol {
  counter-reset: tocchapter;
}
.toc li {
  counter-increment: tocchapter;
  border-bottom: 1px solid var(--rule-soft);
}
.toc a {
  display: grid;
  grid-template-columns: 2.5rem 1fr auto;
  align-items: baseline;
  padding: 1rem 0.25rem;
  gap: 1rem;
  transition: padding 0.15s, background 0.15s;
}
.toc a:hover {
  padding-left: 1rem;
  background: var(--paper-shadow);
}
.toc a::before {
  content: counter(tocchapter, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--oxblood);
  letter-spacing: 0.05em;
  position: relative;
  top: -0.15em;
}
.toc-title {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 500;
  font-variation-settings: "opsz" 60;
  letter-spacing: -0.01em;
  line-height: 1.1;
}
.toc-desc {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--ink-mute);
  display: block;
  font-weight: 400;
  margin-top: 0.2rem;
  letter-spacing: 0;
}
.toc-arrow {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: var(--ink-mute);
  font-style: italic;
  transition: color 0.15s, transform 0.15s;
}
.toc a:hover .toc-arrow {
  color: var(--oxblood);
  transform: translateX(4px);
}

.cover-stamp-wrap {
  position: absolute;
  top: 8.5rem;
  right: clamp(1.5rem, 5vw, 5rem);
  pointer-events: none;
  z-index: 0;
  transform: rotate(4deg);
}

/* Stack chip on cover */
.cover-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.5rem;
  margin-top: 1.5rem;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.32rem 0.7rem;
  border: 1px solid var(--rule);
  background: rgba(243, 236, 220, 0.4);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  border-radius: 999px;
}
.chip::before {
  content: '';
  width: 0.4rem;
  height: 0.4rem;
  background: var(--oxblood);
  border-radius: 50%;
}
.chip:nth-child(2n)::before { background: var(--teal); }
.chip:nth-child(3n)::before { background: var(--amber); }
.chip:nth-child(5n)::before { background: var(--olive); }

/* Ornament: rule with diamond */
.ornament {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 3rem 0;
  color: var(--rule);
}
.ornament::before, .ornament::after {
  content: '';
  flex: 1;
  height: 1px;
  background: currentColor;
}
.ornament-mark {
  width: 0.5rem;
  height: 0.5rem;
  background: var(--oxblood);
  transform: rotate(45deg);
  flex: 0 0 auto;
}

/* Special: terminal-emulating environment table */
.env-card {
  border: 1px solid var(--rule);
  padding: 1.5rem 1.75rem;
  margin: 1.25rem 0;
  background: rgba(243, 236, 220, 0.4);
  position: relative;
}
.env-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}
.env-card h3 {
  margin: 0;
  font-size: 1.4rem;
}
.env-card .env-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--ink);
  padding: 0.25rem 0.6rem;
}
.env-card.is-prod .env-tag { background: var(--oxblood); }
.env-card.is-test .env-tag { background: var(--teal); }
.env-card.is-local .env-tag { background: var(--olive); }
.env-card .env-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-mute);
  margin-top: 0.25rem;
}
.env-card .env-meta a {
  color: var(--oxblood);
  text-decoration: underline;
}

/* OS tabs (install page) */
.os-tabs {
  display: flex;
  border-bottom: 1px solid var(--rule);
  margin: 2rem 0 0;
  gap: 0;
}
.os-tab {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.7rem 1.2rem 0.85rem;
  color: var(--ink-mute);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
  background: transparent;
}
.os-tab:hover {
  color: var(--ink-soft);
}
.os-tab.is-active {
  color: var(--oxblood);
  border-bottom-color: var(--oxblood);
  font-weight: 500;
}
.os-panel {
  display: none;
  padding-top: 1.5rem;
}
.os-panel.is-active {
  display: block;
}

/* Steps (numbered list with big numerals) */
.steps {
  margin: 2rem 0 3rem;
  list-style: none;
  counter-reset: step;
  padding: 0;
}
.steps > li {
  counter-increment: step;
  position: relative;
  padding-left: 4rem;
  padding-bottom: 2rem;
  border-left: 1px solid var(--rule-soft);
  margin-left: 1rem;
  padding-top: 0.25rem;
  max-width: none;
}
.steps > li:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}
.steps > li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: 0;
  left: -1.05rem;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  font-variation-settings: "opsz" 144;
  color: var(--oxblood);
  background: var(--paper);
  padding: 0 0.45rem;
  line-height: 1;
}
.steps h3 {
  margin-top: 0;
  margin-bottom: 0.4rem;
  font-size: 1.3rem;
}

/* Divergent / two-column scenarios on workflow page */
.scenarios {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin: 2rem 0;
}
@media (min-width: 720px) {
  .scenarios {
    grid-template-columns: 1fr 1fr;
  }
}
.scenario {
  border: 1px solid var(--rule);
  padding: 1.5rem 1.75rem;
  background: rgba(243, 236, 220, 0.4);
}
.scenario-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--oxblood);
  margin-bottom: 0.65rem;
}
.scenario h3 {
  margin-top: 0;
  margin-bottom: 0.85rem;
}

/* MCP toggle visualization */
.mcp-comparison {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}
@media (min-width: 720px) {
  .mcp-comparison {
    grid-template-columns: 1fr 1fr;
  }
}
.mcp-side {
  border: 1px solid var(--rule);
  padding: 1.5rem 1.75rem;
  background: rgba(243, 236, 220, 0.4);
  position: relative;
}
.mcp-side.before {
  opacity: 0.85;
}
.mcp-side.after {
  border: 1px solid var(--oxblood);
  background: rgba(122, 46, 31, 0.04);
}
.mcp-side-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ink-mute);
  margin-bottom: 0.5rem;
}
.mcp-side.after .mcp-side-label {
  color: var(--oxblood);
}
.mcp-side h3 {
  margin-top: 0;
  margin-bottom: 0.85rem;
  font-size: 1.2rem;
}
.mcp-side ul {
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* User table for seed users */
.user-table td:first-child {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--teal);
  font-weight: 500;
}
.user-table td:last-child {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.95rem;
}

/* ─── RESPONSIVE ─────────────────────────── */
@media (max-width: 920px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
    padding: 1.5rem var(--gutter) 2rem;
    overflow: visible;
  }
  .sidebar-inner {
    padding-right: 0;
    max-width: 1400px;
    margin: 0 auto;
  }
  main {
    padding-top: 2.5rem;
  }
  h2 .num {
    position: static;
    display: block;
    margin-bottom: 0.5rem;
  }
  .cover-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .cover-stamp-wrap {
    position: static;
    margin: 1rem 0;
  }
}

@media (max-width: 540px) {
  .masthead-meta { display: none; }
  .cover-meta {
    grid-template-columns: 1fr;
    align-items: start;
  }
  .cover-meta .vol { margin-bottom: 0.25rem; }
  .page-footer {
    grid-template-columns: 1fr;
  }
  .page-footer .next {
    align-items: flex-start;
    text-align: left;
  }
  .toc a {
    grid-template-columns: 2rem 1fr auto;
    gap: 0.5rem;
  }
  .toc-title { font-size: 1.15rem; }
}

/* Print ─────────── */
@media print {
  .sidebar, .masthead, .colophon, .page-footer { display: none; }
  body::before { display: none; }
  body { background: white; color: black; }
}