:root {
  --bg: #1e1e1e;
  --surface: #232323;
  --inset: #141414;
  --panel: #1a1a1a;
  --raised: #2a2a2a;
  --border: #333;
  --border-soft: #3a3a3a;

  --text-heading: #f4f4f4;
  --text-body: #d8d8d8;
  --text-bright: #ededed;
  --text-tertiary: #bdbdbd;
  --text-quiet: #a8a8a8;
  --text-placeholder: #9a9a9a;

  --amber: #ffb547;
  --amber-hi: #ffc872;
  --amber-fill: rgba(255,181,71,0.10);
  --amber-fill-soft: rgba(255,181,71,0.05);
  --amber-border: rgba(255,181,71,0.40);
  --amber-rule: rgba(255,181,71,0.32);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text-body);
  font: 400 18px/1.65 'IBM Plex Sans', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }

.page    { max-width: 1200px; margin: 0 auto; padding: 0 48px; }
.reading { max-width: 800px;  margin: 0 auto; }

.section { padding: 96px 0; }
.section + .section { border-top: 1px solid var(--border); }
/* uniform section rhythm: trailing content collapses to the 96px padding, so every
   section ends with the same space below its last element as it starts with above */
.section > *:last-child,
.section > .reading:last-child > *:last-child { margin-bottom: 0; }

.eyebrow {
  font: 500 14px/1 'JetBrains Mono', monospace;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--amber); margin: 0 0 24px;
}
.section-title {
  font: 700 56px/1.0 'Bricolage Grotesque', sans-serif;
  letter-spacing: -0.03em; color: var(--text-heading);
  font-variation-settings: "opsz" 96, "wdth" 100;
  margin: 0 0 32px;
}
.subsection-eyebrow {
  font: 600 14px/1 'JetBrains Mono', monospace;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--amber); margin: 0 0 24px;
}
.subsection-title {
  font: 700 36px/1.1 'Bricolage Grotesque', sans-serif;
  letter-spacing: -0.02em; color: var(--text-heading);
  font-variation-settings: "opsz" 48;
  margin: 0 0 40px;
}

.reading p { color: var(--text-body); margin: 0 0 22px; max-width: 64ch; }
.lead { font-size: 20px; line-height: 1.6; color: var(--text-bright); }
.reading em { color: var(--text-bright); font-style: italic; }
.reading strong { color: var(--text-heading); font-weight: 600; }
.reading h4 {
  font: 600 24px/1.2 'Bricolage Grotesque', sans-serif;
  letter-spacing: -0.015em; color: var(--text-heading);
  font-variation-settings: "opsz" 32; margin: 40px 0 16px;
}
.reading ul, .reading ol { margin: 0 0 22px; padding-left: 22px; }
.reading li { color: var(--text-body); margin: 0 0 10px; }
code.inline {
  background: var(--raised); padding: 2px 6px; border-radius: 2px;
  color: var(--amber); font: 13px 'JetBrains Mono', monospace;
}
a { color: var(--amber); text-decoration: none; }
a:hover { color: var(--amber-hi); text-decoration: underline; }

.hero { padding: 120px 0 96px; }
.hero .section-title { margin-bottom: 28px; }
.outline { display: block; margin-top: 48px; border-top: 1px solid var(--border); margin-left: -16px; margin-right: -16px; }
.outline-item {
  display: grid; grid-template-columns: 120px 1fr; gap: 24px; align-items: baseline;
  padding: 22px 16px; border-bottom: 1px solid var(--border);
  color: inherit; text-decoration: none;
  transition: background 0.18s ease;
}
.outline-item:hover {
  background: var(--amber-fill-soft);
  color: inherit; text-decoration: none;
}
.outline-num {
  font: 600 13px/1.3 'JetBrains Mono', monospace; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--amber);
  transition: color 0.18s ease;
}
.outline-item:hover .outline-num { color: var(--amber-hi); }
.outline-body { font: 400 17px/1.55 'IBM Plex Sans', sans-serif; color: var(--text-tertiary); transition: color 0.18s ease; }
.outline-item:hover .outline-body { color: var(--text-body); }
.outline-label { color: var(--text-heading); font-weight: 600; transition: color 0.18s ease; }
.outline-item:hover .outline-label { color: var(--amber); }
@media (max-width: 560px) {
  .outline-item { grid-template-columns: 1fr; gap: 6px; }
}

.callout { border-left: 3px solid var(--amber); padding: 4px 0 4px 28px; margin: 32px 0; }
.callout-label {
  font: 600 13px/1 'JetBrains Mono', monospace; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--amber); margin: 0 0 12px;
}
.callout p { font-style: italic; font-size: 17px; line-height: 1.6; color: var(--text-bright); margin: 0; }
.callout p + p { margin-top: 14px; }

.chip {
  font: 500 14px/1 'JetBrains Mono', monospace; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-tertiary);
  border: 1px solid var(--border-soft); border-radius: 2px; padding: 3px 8px;
  display: inline-block;
}
.chip.amber { color: var(--amber); background: var(--amber-fill); border-color: var(--amber-border); }

.compare { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 24px; margin: 28px 0; }
.zone { padding: 24px 26px; border-radius: 0 6px 6px 0; }
.zone.closed { border-left: 2px solid var(--border-soft); }
.zone.open { border-left: 2px solid var(--amber); background: var(--amber-fill-soft); }
.zone-label {
  font: 600 12px/1 'JetBrains Mono', monospace; letter-spacing: 0.05em;
  text-transform: uppercase; white-space: nowrap; margin: 0 0 16px;
}
.zone.closed .zone-label { color: var(--text-tertiary); }
.zone.open .zone-label { color: var(--amber); }
.zone p { margin: 0; font-size: 16px; line-height: 1.55; }
.zone.closed p { color: var(--text-tertiary); }
.zone.open p { color: var(--text-bright); }
@media (max-width: 700px) { .compare { grid-template-columns: 1fr; } }

.qpair { margin: 44px 0 40px; border-left: 3px solid var(--amber); padding: 4px 0 4px 32px; }
.q + .q { margin-top: 24px; }
.q-tag { font: 600 13px/1 'JetBrains Mono', monospace; letter-spacing: 0.14em; text-transform: uppercase; margin: 0 0 12px; }
.q.wrong .q-tag { color: var(--text-tertiary); }
.q.right .q-tag { color: var(--amber); }
.q-text { font: italic 500 22px/1.4 'Bricolage Grotesque', sans-serif; letter-spacing: -0.01em; font-variation-settings: "opsz" 32; margin: 0; }
.q.wrong .q-text { color: var(--text-quiet); }
.q.right .q-text { color: var(--text-heading); }

.example { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 28px 30px; margin: 22px 0; }
.example-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin: 0 0 20px; }
.example-title { font: 600 22px/1.25 'Bricolage Grotesque', sans-serif; letter-spacing: -0.015em; color: var(--text-heading); font-variation-settings: "opsz" 32; margin: 0; }
.example .zone { margin: 0; border-radius: 0 4px 4px 0; }
.example .zone.closed { margin-bottom: 12px; }
@media (max-width: 560px) { .example-head { flex-direction: column; gap: 8px; } }

.stats-section .reading { margin-bottom: 56px; }
.cluster-label {
  font: 600 14px/1 'JetBrains Mono', monospace; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--amber); display: flex; align-items: center; gap: 16px; margin: 0 0 24px;
}
.cluster-label::after { content: ""; flex: 1; height: 1px; background: var(--amber-rule); }
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); margin-bottom: 48px; }
.stat { padding: 0 28px 4px 0; }
.stat-num {
  font: 700 56px/0.95 'Bricolage Grotesque', sans-serif; letter-spacing: -0.035em;
  color: var(--text-heading); font-variation-settings: "opsz" 64; margin: 0 0 14px;
}
.stat-label { font: 400 15px/1.45 'IBM Plex Sans', sans-serif; color: var(--text-tertiary); max-width: 24ch; }
.cost-row { display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--border); padding-top: 20px; }
.cost-num { font: 700 56px/0.95 'Bricolage Grotesque', sans-serif; letter-spacing: -0.035em; color: var(--amber); font-variation-settings: "opsz" 64; margin: 0 0 8px; }
.cost-label { font: 400 15px/1.45 'IBM Plex Sans', sans-serif; color: var(--text-tertiary); }
@media (max-width: 900px) { .stat-row { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .stat-row { grid-template-columns: 1fr; } }

.code-block {
  background: var(--inset); border: 1px solid var(--border); border-radius: 6px;
  padding: 26px 28px; overflow-x: auto; margin: 26px 0;
}
.code-block pre { margin: 0; font: 14px/1.7 'JetBrains Mono', monospace; color: var(--text-body); white-space: pre; }
.code-block .k { color: var(--amber); font-weight: 600; }
.code-block .ph { color: var(--text-placeholder); }

.doc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 28px 0; }
.doc-card { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 24px 28px; }
.doc-card-name { font: 500 15px/1.2 'JetBrains Mono', monospace; color: var(--amber) !important; margin: 0 0 8px; }
.doc-card-role { font: 400 15px/1.5 'IBM Plex Sans', sans-serif; color: var(--text-body); margin: 0; }
@media (max-width: 820px) { .doc-grid { grid-template-columns: 1fr; } }

/* section 03 internal nudge toward the Starter Pack */
.repo-pointer { font: 400 15px/1.6 'IBM Plex Sans', sans-serif; color: var(--text-body); margin: 32px 0 0; padding-top: 22px; border-top: 1px solid var(--border); }
.repo-pointer a { font-weight: 500; }

/* single Starter Pack CTA to the public repo */
.starter-cta { display: flex; gap: 12px; margin: 24px 0 8px; flex-wrap: wrap; }
.cta-link { font: 500 14px/1 'JetBrains Mono', monospace; color: var(--amber); text-decoration: none; border: 1px solid var(--amber-border); border-radius: 4px; padding: 12px 18px; transition: border-color 0.15s, background 0.15s; }
.cta-link:hover { border-color: var(--amber); background: var(--amber-fill); text-decoration: none; }
.cta-primary { background: var(--amber); color: var(--bg); border-color: var(--amber); }
.cta-primary:hover { background: var(--amber-hi); border-color: var(--amber-hi); color: var(--bg); }

.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 28px 0; }
.flow-step {
  background: var(--surface); border: 1px solid var(--border); border-radius: 6px;
  padding: 12px 16px; font: 500 13px/1.3 'JetBrains Mono', monospace;
  color: var(--text-body); letter-spacing: 0.02em; text-align: center;
}
.flow-arrow { color: var(--amber); font-size: 18px; line-height: 1; }
@media (max-width: 560px) {
  .flow { flex-direction: column; align-items: stretch; }
  .flow-arrow { text-align: center; transform: rotate(90deg); }
}

.spread { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: stretch; margin: 0 0 24px; }
.figure-plate { margin: 0; background: var(--inset); border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.figure-plate-head {
  font: 600 14px/1 'JetBrains Mono', monospace; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--amber); padding: 15px 18px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 14px;
}
.figure-plate-head::after { content: ""; flex: 1; height: 1px; background: var(--amber-rule); }
.figure-plate-body {
  height: 880px; padding: 22px; display: flex; align-items: center; justify-content: center;
  background: var(--bg);
}
.figure-plate-body picture { display: contents; }
.figure-plate-body img { height: 100%; width: auto; max-width: 100%; object-fit: contain; border-radius: 8px; }
@media (max-width: 900px) {
  .figure-plate-body { height: auto; padding: 16px; }
  .figure-plate-body img { height: auto; width: 100%; }
}
.figure { display: flex; flex-direction: column; margin: 0; }
.figure-caption { font: 400 15px/1.5 'IBM Plex Sans', sans-serif; color: var(--text-tertiary); margin: 18px 0 0; }
.figure-caption strong { color: var(--text-bright); font-weight: 600; }
.rack-credit {
  max-width: 800px; margin: 28px auto 96px; padding-top: 24px; border-top: 1px solid var(--border);
  text-align: center; font: italic 400 15px/1.5 'IBM Plex Sans', sans-serif; color: var(--text-quiet);
}
@media (max-width: 900px) { .spread { grid-template-columns: 1fr; } }

.hw-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 0 0 56px; align-items: stretch; }
.hw-card { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 36px 32px; display: flex; flex-direction: column; }
.hw-card-accent, .outcome-accent { width: 48px; height: 2px; background: var(--amber); border-radius: 1px; }
.hw-card-accent { margin: 0 0 28px; }
.hw-card-name { font: 700 30px/1.1 'Bricolage Grotesque', sans-serif; letter-spacing: -0.02em; color: var(--text-heading); font-variation-settings: "opsz" 48; margin: 0 0 32px; }
.hw-card-specs { display: flex; flex-direction: column; gap: 18px; }
.hw-card-section { border-top: 1px solid var(--border); padding-top: 14px; }
.hw-card-section:first-child { border-top: 0; padding-top: 0; }
.hw-card-label { font: 500 13px/1 'JetBrains Mono', monospace; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-tertiary); margin: 0 0 6px; }
.hw-card-value { font: 400 16px/1.55 'IBM Plex Sans', sans-serif; color: var(--text-bright); margin: 0; }
.hw-card-value strong { color: var(--text-heading); font-weight: 600; }
.hw-card-role { margin-top: auto; padding-top: 22px; border-top: 1px dashed var(--border-soft); font: 400 16px/1.55 'IBM Plex Sans', sans-serif; color: var(--text-bright); }
.hw-card-role .label { font: 500 13px/1 'JetBrains Mono', monospace; letter-spacing: 0.12em; text-transform: uppercase; color: var(--amber); display: block; margin: 0 0 6px; }
.closing-note {
  background: var(--surface); border-left: 3px solid var(--amber); border-radius: 0 4px 4px 0;
  padding: 20px 28px; margin: 0 0 56px; font: 400 16px/1.6 'IBM Plex Sans', sans-serif; color: var(--text-body);
}
.closing-note strong { color: var(--text-heading); font-weight: 600; }
@media (max-width: 900px) { .hw-grid { grid-template-columns: 1fr; } .hw-card-name { font-size: 26px; } }

/* ===== §10 Network topology (4.8) ===== */
.topo {
  background:
    linear-gradient(rgba(255,255,255,0.014) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.014) 1px, transparent 1px),
    var(--panel);
  background-size: 34px 34px, 34px 34px, auto;
  border: 1px solid var(--raised); border-radius: 10px;
  padding: 44px 48px 28px; margin: 44px 0 0;
}
/* deliberate breathing room between the topology map and the Segmentation subsection */
.topo + .reading { margin-top: 56px; }
.band {
  display: flex; align-items: stretch;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; overflow: hidden;
}
.band-tier {
  flex-shrink: 0; width: 168px; display: flex; align-items: center;
  padding: 22px 24px; border-right: 1px solid var(--border);
  font: 600 13px/1 'JetBrains Mono', monospace; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--amber);
}
.band-body {
  flex: 1; display: flex; align-items: center; justify-content: space-between;
  gap: 24px; padding: 22px 28px;
}
.band-name {
  font: 700 25px/1.1 'Bricolage Grotesque', sans-serif; letter-spacing: -0.02em;
  color: var(--text-heading); font-variation-settings: "opsz" 40;
}
.band-spec {
  flex-shrink: 0; font: 400 13px/1 'JetBrains Mono', monospace;
  letter-spacing: 0.03em; color: var(--text-tertiary); text-align: right;
}

/* amber connectors between bands */
.connector { position: relative; height: 36px; display: flex; align-items: center; justify-content: center; }
.connector::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: 50%;
  width: 2px; background: var(--amber); transform: translateX(-50%);
}
.connector-label {
  position: relative; background: var(--panel); padding: 2px 12px;
  font: 600 13px/1 'JetBrains Mono', monospace; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--amber-hi);
}

/* distribution boundary - amber path ends above this, nothing below is amber */
.dist-label { display: flex; align-items: center; gap: 16px; margin: 38px 0 24px; }
.dist-label span {
  font: 600 13px/1 'JetBrains Mono', monospace; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-tertiary); white-space: nowrap;
}
.dist-label::after { content: ""; flex: 1; height: 1px; background: var(--border); }

/* branches - uniform 3-up grid */
.branches { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.branch {
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 22px 24px; display: flex; flex-direction: column; gap: 7px;
}
.branch-kicker {
  font: 600 13px/1 'JetBrains Mono', monospace; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-tertiary); margin: 0;
}
.branch-name {
  font: 700 21px/1.15 'Bricolage Grotesque', sans-serif; letter-spacing: -0.015em;
  color: var(--text-heading); font-variation-settings: "opsz" 28; margin: 0;
}
.branch-hw {
  font: 400 13px/1.4 'JetBrains Mono', monospace; letter-spacing: 0.02em;
  color: var(--text-body); margin: 2px 0 0;
}
.branch-sub {
  flex: 1; font: 400 14px/1.5 'IBM Plex Sans', sans-serif;
  color: var(--text-body); margin: 0;
}
.branch-chips { display: flex; flex-wrap: wrap; gap: 6px; padding-top: 4px; }
.branch-chips .chip {
  font-size: 12px; letter-spacing: 0.06em; padding: 2px 8px;
  color: var(--amber); background: var(--amber-fill); border-color: var(--amber-border);
}
.branch-chips .chip.lock { background: transparent; border-style: dashed; }

/* ===== §10 VLAN cards (4.9) ===== */
.vlan-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 28px 0 22px; align-items: start; }
.vlan-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; padding: 24px 30px 14px;
}
.vlan-card .vlan-id {
  font: 600 13px/1 'JetBrains Mono', monospace; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--amber); margin: 0 0 8px;
}
.vlan-card .vlan-name {
  font: 700 24px/1.15 'Bricolage Grotesque', sans-serif; letter-spacing: -0.015em;
  color: var(--text-heading); font-variation-settings: "opsz" 32; margin: 0 0 12px;
}
.vlan-text { font: 400 15px/1.55 'IBM Plex Sans', sans-serif; color: var(--text-body); margin: 0; }

/* §10 responsive */
@media (max-width: 1040px) { .branches { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 820px) {
  .branches { grid-template-columns: 1fr; }
  .band { flex-direction: column; align-items: stretch; }
  .band-tier { width: auto; border-right: 0; border-bottom: 1px solid var(--border); padding: 14px 20px; }
  .band-body { flex-direction: column; align-items: flex-start; gap: 8px; padding: 16px 20px; }
  .band-spec { text-align: left; }
}
@media (max-width: 700px) { .vlan-grid { grid-template-columns: 1fr; } }

/* ===== §11 Software stack (4.10 service card) ===== */
.svc-group { margin-bottom: 48px; }
.svc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 20px 0; align-items: start; }
.svc-card { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 22px 24px; }
.svc-card .svc-host { font: 600 13px/1 'JetBrains Mono', monospace; letter-spacing: 0.12em; text-transform: uppercase; color: var(--amber); margin: 0 0 10px; }
.svc-card .svc-name { font: 700 20px/1.15 'Bricolage Grotesque', sans-serif; letter-spacing: -0.015em; color: var(--text-heading); font-variation-settings: "opsz" 28; margin: 0 0 8px; }
.svc-card .svc-role { font: 400 15px/1.5 'IBM Plex Sans', sans-serif; color: var(--text-body); margin: 0; max-width: none; }
@media (max-width: 700px) { .svc-grid { grid-template-columns: 1fr; } }

/* ===== §12 What this unlocks (4.11 outcome card) ===== */
.outcome-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 28px 0; align-items: start; }
.outcome-card { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 28px 30px; }
.outcome-accent { margin: 0 0 20px; }
.outcome-card .outcome-title { font: 700 22px/1.2 'Bricolage Grotesque', sans-serif; letter-spacing: -0.015em; color: var(--text-heading); font-variation-settings: "opsz" 32; margin: 0 0 12px; }
.outcome-card .outcome-text { font: 400 16px/1.55 'IBM Plex Sans', sans-serif; color: var(--text-body); margin: 0; max-width: none; }
@media (max-width: 700px) { .outcome-grid { grid-template-columns: 1fr; } }

/* ===== §13 The journey (4.12 timeline) ===== */
/* marker convention: amber-filled = a month, hollow = an item (do not invert) */
.timeline { margin: 52px 0 0; }
.tl-month { position: relative; border-left: 2px solid var(--border); padding: 0 0 24px 40px; margin-left: 7px; }
.tl-month::before {
  content: ""; position: absolute; left: -9px; top: 2px; width: 16px; height: 16px;
  border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 4px var(--bg);
}
.tl-month .tl-month-label {
  font: 600 14px/1 'JetBrains Mono', monospace; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--amber); margin: 0; padding-top: 1px;
}
.tl-entry { position: relative; border-left: 2px solid var(--border); padding: 0 0 34px 40px; margin-left: 7px; }
.tl-entry:last-child { border-left-color: transparent; }
.tl-entry::before {
  content: ""; position: absolute; left: -7px; top: 5px; width: 12px; height: 12px;
  border-radius: 50%; background: var(--bg); border: 2px solid #555;
}
.tl-entry .tl-title {
  font: 600 22px/1.25 'Bricolage Grotesque', sans-serif; letter-spacing: -0.015em;
  color: var(--text-heading); font-variation-settings: "opsz" 32; margin: 0 0 4px;
}
.tl-entry .tl-text { font: 400 16px/1.6 'IBM Plex Sans', sans-serif; color: var(--text-body); margin: 0; max-width: none; }
/* hero entry keeps the standard hollow node; amber lives in the box, not the marker */
.tl-entry.hero .hero-box {
  background: var(--amber-fill-soft); border: 1px solid var(--amber-border); border-left: 3px solid var(--amber);
  border-radius: 0 6px 6px 0; padding: 22px 26px 24px; margin-top: 2px;
}
.tl-entry.hero .tl-title { font-size: 24px; }
.tl-entry.hero .tl-aside { font: 400 16px/1.5 'IBM Plex Sans', sans-serif; color: var(--amber-hi); margin: 16px 0 0; max-width: none; }
/* closing coda — lighter than .callout, roman not italic */
.coda { margin: 8px 0 0; border-left: 3px solid var(--amber); padding: 4px 0 4px 28px; }
.coda .coda-label {
  font: 600 13px/1 'JetBrains Mono', monospace; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--amber); margin: 0 0 12px;
}
.coda p { font: 400 17px/1.6 'IBM Plex Sans', sans-serif; color: var(--text-bright); margin: 0; max-width: none; }

/* ===== §14 starter pack ===== */
.subpart { margin-top: 64px; }
.sp-eyebrow {
  font: 600 14px/1 'JetBrains Mono', monospace; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--amber); margin: 0 0 14px;
}
.sp-subhead {
  font: 600 28px/1.15 'Bricolage Grotesque', sans-serif; letter-spacing: -0.02em;
  color: var(--text-heading); font-variation-settings: "opsz" 40; margin: 0 0 20px;
}
.sp-subhead em { color: var(--amber); font-style: italic; }
.sp-subhead.sp-intro { margin-bottom: 16px; }
.reading .scope { list-style: none; margin: 0 0 22px; padding: 0; }
.reading .scope li {
  position: relative; padding: 10px 0 10px 28px; margin: 0; border-top: 1px solid var(--border);
  font-size: 17px; line-height: 1.5; color: var(--text-bright);
}
.reading .scope li::before {
  content: ""; position: absolute; left: 0; top: 19px;
  width: 9px; height: 9px; border: 2px solid var(--amber); border-radius: 50%;
}
.code-wrap { margin: 26px 0 0; }
.code-head {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  background: var(--panel); border: 1px solid var(--border); border-bottom: 0;
  border-radius: 6px 6px 0 0; padding: 12px 16px 12px 20px;
}
.code-head-label {
  font: 600 13px 'JetBrains Mono', monospace; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--amber);
}
.copy-btn {
  font: 600 12px 'JetBrains Mono', monospace; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-tertiary); background: transparent;
  border: 1px solid var(--border-soft); border-radius: 3px; padding: 7px 13px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.copy-btn:hover, .copy-btn.copied { color: var(--amber); border-color: var(--amber-border); }
.copy-btn.copied { background: var(--amber-fill); }
.copy-btn svg { width: 14px; height: 14px; flex-shrink: 0; }
.code-wrap .code-block { border-radius: 0 0 6px 6px; margin: 0; }
.skel { margin: 22px 0 0; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.skel-item {
  display: grid; grid-template-columns: 210px 1fr; gap: 28px;
  padding: 18px 26px; border-top: 1px solid var(--border); background: var(--surface);
}
.skel-item:first-child { border-top: 0; }
.skel-name {
  font: 600 18px/1.25 'Bricolage Grotesque', sans-serif; letter-spacing: -0.01em;
  color: var(--text-heading); font-variation-settings: "opsz" 24;
}
.skel .skel-desc { font: 400 15px/1.5 'IBM Plex Sans', sans-serif; color: var(--text-body); margin: 0; }
.reading .checklist { list-style: none; margin: 22px 0 0; padding: 0; }
.reading .checklist li {
  position: relative; padding: 0 0 16px 32px; margin: 0;
  font-size: 16px; line-height: 1.55; color: var(--text-body);
}
.reading .checklist li:last-child { padding-bottom: 0; }
.reading .checklist li::before {
  content: ""; position: absolute; left: 2px; top: 7px;
  width: 9px; height: 5px; border-left: 2px solid var(--amber); border-bottom: 2px solid var(--amber);
  transform: rotate(-45deg);
}
.reading .pitfalls { margin: 22px 0 0; list-style: none; padding: 4px 0 4px 24px; border-left: 1px solid var(--border-soft); }
.reading .pitfalls li { padding: 0 0 18px; margin: 0; font-size: 16px; line-height: 1.55; color: var(--text-body); }
.reading .pitfalls li:last-child { padding-bottom: 0; }
.pitfalls strong { color: var(--text-bright); font-weight: 600; }
.closing { text-align: center; margin: 72px auto 0; max-width: 720px; padding-top: 52px; border-top: 1px solid var(--border); }
.closing p {
  font: 700 34px/1.25 'Bricolage Grotesque', sans-serif; letter-spacing: -0.02em;
  color: var(--text-heading); font-variation-settings: "opsz" 48; margin: 0;
}
.closing em { color: var(--amber); font-style: italic; }
@media (max-width: 820px) {
  .subpart { margin-top: 48px; }
  .skel-item { grid-template-columns: 1fr; gap: 6px; }
  .closing p { font-size: 27px; }
  .code-block pre { font-size: 13px; }
}

.part-divider { text-align: center; padding: 112px 0; border-top: 1px solid var(--border); }
.part-divider + .section { padding-top: 0; }
.part-divider::before {
  content: ""; display: block; width: 40px; height: 2px;
  background: var(--amber); margin: 0 auto 16px;
}
.part-divider .eyebrow { display: block; color: var(--amber); letter-spacing: 0.24em; margin-bottom: 20px; }
.part-title {
  font: 700 56px/1.0 'Bricolage Grotesque', sans-serif; letter-spacing: -0.03em;
  color: var(--text-heading); font-variation-settings: "opsz" 96, "wdth" 100;
  margin: 0 0 22px;
}
.part-frame { font: 400 19px/1.6 'IBM Plex Sans', sans-serif; color: var(--text-tertiary); max-width: 48ch; margin: 0 auto; }
@media (max-width: 900px) { .part-title { font-size: 42px; } .part-divider { padding: 76px 0; } }

.signoff { padding: 64px 0 80px; border-top: 1px solid var(--border); }
.signoff p {
  text-align: center; max-width: none; color: var(--text-tertiary);
  font: 400 15px/1 'IBM Plex Sans', sans-serif; letter-spacing: 0.02em;
}

@media (max-width: 900px) {
  .page { padding: 0 28px; }
  .section { padding: 72px 0; }
  .section-title { font-size: 42px; }
}
@media (max-width: 560px) {
  .subsection-title { font-size: 30px; }
}