:root {
  --bg: #061019;
  --bg-deep: #040a11;
  --bg-raised: #0a1622;
  --surface: rgba(13, 27, 41, 0.88);
  --surface-strong: #102033;
  --surface-soft: rgba(20, 38, 57, 0.62);
  --surface-hover: rgba(29, 51, 72, 0.72);
  --border: rgba(135, 160, 183, 0.2);
  --border-bright: rgba(157, 187, 212, 0.38);
  --grid-line: rgba(121, 153, 180, 0.055);

  --text: #eef5f7;
  --text-soft: #c9d6dc;
  --muted: #92a7b4;
  --faint: #667d8b;
  --customer: #f4efe5;
  --color-a: #38bde8;
  --color-a-rgb: 56, 189, 232;
  --color-b: #a78bfa;
  --color-b-rgb: 167, 139, 250;
  --color-transition: #f2b84b;
  --color-transition-rgb: 242, 184, 75;
  --color-target: #3dd3a0;
  --color-target-rgb: 61, 211, 160;
  --color-risk: #fb7185;
  --color-risk-rgb: 251, 113, 133;
  --neutral: #7891a2;

  --font-sans: "Avenir Next", "Segoe UI Variable", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", "Cascadia Code", "Liberation Mono", Consolas, monospace;

  --rail-width: 260px;
  --content-width: 1200px;
  --content-wide: 1320px;
  --page-pad: clamp(24px, 4vw, 72px);
  --section-pad: clamp(88px, 9vw, 144px);
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4.5rem;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --shadow-panel: 0 26px 70px rgba(0, 0, 0, 0.25);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  scroll-padding-top: 32px;
  background: var(--bg);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 82% 5%, rgba(var(--color-b-rgb), 0.08), transparent 27rem),
    radial-gradient(circle at 20% 18%, rgba(var(--color-a-rgb), 0.06), transparent 32rem),
    var(--bg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black, transparent 88%);
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
dd,
blockquote {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  line-height: 1.07;
  letter-spacing: -0.035em;
}

p:last-child,
ul:last-child,
ol:last-child,
dl:last-child {
  margin-bottom: 0;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-transition);
  outline-offset: 4px;
}

::selection {
  color: var(--bg-deep);
  background: var(--color-a);
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  color: var(--bg);
  background: var(--customer);
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 180ms var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.reading-progress {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 900;
  height: 3px;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.04);
}

.reading-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--color-a), var(--color-b), var(--color-transition), var(--color-target));
  box-shadow: 0 0 14px rgba(var(--color-a-rgb), 0.35);
  transform-origin: left;
}

.site-rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 80;
  display: flex;
  width: var(--rail-width);
  flex-direction: column;
  padding: 30px 22px 24px;
  border-right: 1px solid var(--border);
  background: rgba(5, 14, 22, 0.91);
  backdrop-filter: blur(18px);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
}

.brand-lockup > span:last-child {
  display: grid;
  gap: 1px;
}

.brand-lockup strong {
  font-size: 0.94rem;
  letter-spacing: 0.02em;
}

.brand-lockup small {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-mark {
  position: relative;
  display: inline-block;
  width: 35px;
  height: 35px;
  flex: 0 0 35px;
  border: 1px solid var(--border-bright);
  border-radius: 50%;
}

.brand-mark::before,
.brand-mark::after,
.brand-mark i {
  position: absolute;
  border-radius: 50%;
  content: "";
}

.brand-mark::before {
  inset: 6px 13px 6px 6px;
  border: 2px solid var(--color-a);
}

.brand-mark::after {
  inset: 6px 6px 6px 13px;
  border: 2px solid var(--color-b);
}

.brand-mark i:first-child {
  top: 15px;
  left: 15px;
  width: 5px;
  height: 5px;
  background: var(--color-transition);
  box-shadow: 0 0 10px rgba(var(--color-transition-rgb), 0.5);
}

.chapter-navigation {
  min-height: 0;
  margin-top: 46px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-bright) transparent;
}

.rail-label,
.eyebrow,
.hero-kicker,
.edition,
.outcome-label,
.note-type,
.matrix-heading > span,
.state-summary small,
.decision-flow header > span,
.migration-sequence header > span,
.completion-criteria header > span,
.closing-statement > span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.rail-label {
  margin-bottom: 12px;
  padding-left: 12px;
  font-size: 0.6rem;
}

.chapter-navigation ol {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.chapter-navigation a {
  position: relative;
  display: grid;
  grid-template-columns: 29px 1fr;
  align-items: center;
  min-height: 37px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 0.73rem;
  line-height: 1.2;
  text-decoration: none;
  transition: color 180ms ease, background 180ms ease;
}

.chapter-navigation a::before {
  position: absolute;
  left: -22px;
  width: 2px;
  height: 0;
  border-radius: 4px;
  background: var(--color-a);
  content: "";
  transition: height 220ms var(--ease);
}

.chapter-navigation a span {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.58rem;
}

.chapter-navigation a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.035);
}

.chapter-navigation a.active,
.chapter-navigation a[aria-current="location"] {
  color: var(--text);
  background: rgba(var(--color-a-rgb), 0.08);
}

.chapter-navigation a.active::before,
.chapter-navigation a[aria-current="location"]::before {
  height: 24px;
}

.chapter-navigation a.active span,
.chapter-navigation a[aria-current="location"] span {
  color: var(--color-a);
}

.rail-status {
  display: grid;
  gap: 3px;
  margin-top: auto;
  padding: 17px 13px 0;
  border-top: 1px solid var(--border);
}

.rail-status span {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.rail-status strong {
  font-size: 0.72rem;
  font-weight: 600;
}

.mobile-header,
.nav-scrim {
  display: none;
}

main {
  margin-left: var(--rail-width);
}

.hero,
.chapter {
  position: relative;
  isolation: isolate;
}

.hero {
  display: flex;
  min-height: 100svh;
  flex-direction: column;
  justify-content: center;
  padding: 50px var(--page-pad) 42px;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 56%, rgba(var(--color-transition-rgb), 0.055), transparent 18rem),
    linear-gradient(180deg, rgba(4, 11, 18, 0.3), rgba(7, 18, 28, 0.7));
}

.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -2;
  opacity: 0.62;
  background-image:
    linear-gradient(rgba(140, 168, 191, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(140, 168, 191, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 55%, black, transparent 70%);
}

.hero-orbit {
  position: absolute;
  z-index: -1;
  border: 1px solid rgba(137, 166, 190, 0.11);
  border-radius: 50%;
  pointer-events: none;
}

.orbit-one {
  top: 43%;
  left: 50%;
  width: 520px;
  height: 520px;
  transform: translate(-50%, -50%);
}

.orbit-two {
  top: 43%;
  left: 50%;
  width: 780px;
  height: 780px;
  transform: translate(-50%, -50%);
}

.hero-topline {
  position: absolute;
  top: 35px;
  right: var(--page-pad);
  left: var(--page-pad);
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.hero-topline p {
  margin: 0;
}

.signal-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 7px;
  border-radius: 50%;
  background: var(--color-target);
  box-shadow: 0 0 0 4px rgba(var(--color-target-rgb), 0.09);
}

.hero-copy {
  max-width: 980px;
  margin: 80px auto 34px;
  text-align: center;
}

.hero-kicker {
  margin-bottom: 17px;
  color: var(--color-a);
}

.hero h1 {
  max-width: 970px;
  margin: 0 auto 20px;
  font-size: clamp(3rem, 6.7vw, 7.1rem);
  font-weight: 650;
  line-height: 0.88;
  letter-spacing: -0.072em;
}

.hero h1 em {
  display: block;
  color: transparent;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.93em;
  font-weight: 400;
  letter-spacing: -0.045em;
  background: linear-gradient(95deg, var(--customer), #9eb8c4 44%, var(--color-b));
  background-clip: text;
  -webkit-background-clip: text;
}

.hero-subtitle {
  margin-bottom: 10px;
  color: var(--text-soft);
  font-size: clamp(1rem, 1.6vw, 1.38rem);
  letter-spacing: -0.015em;
}

.hero-intro {
  max-width: 690px;
  margin-right: auto;
  margin-bottom: 0;
  margin-left: auto;
  color: var(--muted);
  font-size: 0.98rem;
}

.fusion-stage {
  display: grid;
  width: min(100%, var(--content-width));
  grid-template-columns: minmax(0, 1fr) 160px minmax(0, 1fr);
  align-items: stretch;
  margin: 0 auto;
}

.world-card {
  position: relative;
  min-height: 270px;
  padding: 24px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, var(--surface), rgba(9, 20, 31, 0.7));
  box-shadow: var(--shadow-panel);
}

.world-card::after {
  position: absolute;
  inset: auto -20% -55% 15%;
  height: 220px;
  border-radius: 50%;
  content: "";
  filter: blur(50px);
  pointer-events: none;
}

.world-a {
  border-top-color: rgba(var(--color-a-rgb), 0.65);
}

.world-a::after {
  background: rgba(var(--color-a-rgb), 0.1);
}

.world-b {
  border-top-color: rgba(var(--color-b-rgb), 0.65);
}

.world-b::after {
  background: rgba(var(--color-b-rgb), 0.1);
}

.world-heading {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.world-code,
.actor-token {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.84rem;
}

.world-a .world-code {
  color: var(--color-a);
  background: rgba(var(--color-a-rgb), 0.08);
}

.world-b .world-code {
  color: var(--color-b);
  background: rgba(var(--color-b-rgb), 0.08);
}

.world-heading p,
.architecture-board header p {
  margin-bottom: 3px;
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.world-heading h2,
.architecture-board header h3 {
  margin: 0;
  font-size: 1.13rem;
}

.signal-list,
.check-list,
.compact-list,
.feature-list,
.ledger-out ul,
.ledger-stay ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.signal-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 7px;
  color: var(--text-soft);
  font-size: 0.79rem;
}

.signal-list li {
  position: relative;
  padding-left: 16px;
}

.signal-list li::before {
  position: absolute;
  top: 0.62em;
  left: 0;
  width: 5px;
  height: 1px;
  background: currentColor;
  content: "";
}

.world-a .signal-list li::before {
  color: var(--color-a);
}

.world-b .signal-list li::before {
  color: var(--color-b);
}

.mini-stack {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 20px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.55rem;
}

.mini-stack span {
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.025);
}

.mini-stack i {
  width: 11px;
  height: 1px;
  background: var(--border-bright);
}

.fusion-core {
  position: relative;
  display: flex;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  gap: 15px;
  text-align: center;
}

.fusion-label {
  position: relative;
  z-index: 2;
  display: grid;
  width: 72px;
  height: 72px;
  place-items: center;
  border: 1px solid rgba(var(--color-transition-rgb), 0.55);
  border-radius: 50%;
  color: var(--color-transition);
  background: var(--bg-raised);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  box-shadow: 0 0 40px rgba(var(--color-transition-rgb), 0.09);
}

.fusion-pulse {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 108px;
  height: 108px;
  border: 1px solid rgba(var(--color-transition-rgb), 0.16);
  border-radius: 50%;
  transform: translate(-50%, -68%);
}

.fusion-line {
  position: absolute;
  top: 43%;
  width: 55px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-transition));
}

.line-left {
  left: 0;
}

.line-right {
  right: 0;
  transform: rotate(180deg);
}

.fusion-core small {
  color: var(--muted);
  font-size: 0.62rem;
  line-height: 1.5;
}

.hero-outcome {
  display: grid;
  width: min(100%, var(--content-width));
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  margin: 17px auto 0;
  padding: 13px 18px;
  border: 1px solid rgba(var(--color-target-rgb), 0.2);
  border-radius: var(--radius-md);
  background: rgba(var(--color-target-rgb), 0.04);
}

.outcome-label {
  color: var(--color-target);
}

.hero-outcome p {
  margin: 0;
  font-size: 0.82rem;
}

.hero-outcome strong:first-child {
  color: var(--color-a);
}

.hero-outcome strong:nth-of-type(2) {
  color: var(--color-b);
}

.text-link {
  color: var(--text-soft);
  font-size: 0.75rem;
  font-weight: 650;
  text-decoration: none;
}

.text-link span {
  margin-left: 6px;
  color: var(--color-target);
}

.chapter {
  padding: var(--section-pad) var(--page-pad);
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(7, 17, 26, 0.24), rgba(9, 22, 33, 0.42));
}

.chapter:nth-of-type(odd) {
  background: linear-gradient(180deg, rgba(13, 26, 39, 0.42), rgba(6, 16, 25, 0.25));
}

.chapter::before {
  position: absolute;
  top: 0;
  left: 14%;
  z-index: -1;
  width: 38%;
  height: 260px;
  border-radius: 50%;
  background: rgba(var(--color-a-rgb), 0.028);
  content: "";
  filter: blur(80px);
}

.chapter-shell {
  width: min(100%, var(--content-width));
  margin: 0 auto;
}

.wide-shell {
  width: min(100%, var(--content-wide));
}

.chapter-header {
  display: grid;
  grid-template-columns: 72px minmax(0, 760px);
  gap: 27px;
  align-items: start;
  margin-bottom: clamp(45px, 6vw, 74px);
}

.chapter-index {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 9px;
  margin-top: 13px;
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.chapter-index i {
  display: block;
  height: 1px;
  background: linear-gradient(90deg, currentColor, transparent);
}

.chapter-header .eyebrow {
  margin-bottom: 12px;
  color: var(--color-a);
}

.chapter-header h2 {
  margin-bottom: 17px;
  font-size: clamp(2.5rem, 5.3vw, 5.2rem);
  font-weight: 610;
  letter-spacing: -0.062em;
}

.chapter-lede {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.35vw, 1.18rem);
  line-height: 1.65;
}

.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 440ms ease, transform 440ms var(--ease);
}

.js .reveal.in-view {
  opacity: 1;
  transform: none;
}

.context-map {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 0.95fr) minmax(0, 1fr);
  align-items: center;
  gap: 24px;
}

.context-actor {
  min-height: 370px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-panel);
}

.actor-a {
  border-top: 2px solid var(--color-a);
}

.actor-b {
  border-top: 2px solid var(--color-b);
}

.actor-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  margin-bottom: 27px;
}

.actor-a .actor-token {
  color: var(--color-a);
}

.actor-b .actor-token {
  color: var(--color-b);
}

.role-tag {
  padding: 5px 9px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  text-transform: uppercase;
}

.context-actor h3 {
  margin-bottom: 24px;
  font-size: 1.45rem;
}

.check-list {
  display: grid;
  gap: 13px;
  color: var(--text-soft);
  font-size: 0.88rem;
}

.check-list li {
  position: relative;
  padding: 0 0 13px 23px;
  border-bottom: 1px solid var(--border);
}

.check-list li::before {
  position: absolute;
  top: 0.28em;
  left: 0;
  width: 9px;
  height: 9px;
  border: 1px solid currentColor;
  border-radius: 50%;
  content: "";
}

.actor-a .check-list li::before {
  color: var(--color-a);
}

.actor-b .check-list li::before {
  color: var(--color-b);
}

.tension-field {
  position: relative;
  min-height: 440px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--color-transition-rgb), 0.09), transparent 53%);
}

.tension-field::before,
.tension-field::after {
  position: absolute;
  inset: 12%;
  border: 1px dashed rgba(var(--color-transition-rgb), 0.2);
  border-radius: 50%;
  content: "";
}

.tension-field::after {
  inset: 27%;
}

.tension-axis {
  position: absolute;
  top: 50%;
  left: 10%;
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-bright), transparent);
}

.tension-axis.vertical {
  transform: rotate(90deg);
}

.tension-center {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  width: 58%;
  text-align: center;
  transform: translate(-50%, -50%);
}

.tension-center small {
  display: block;
  margin-bottom: 9px;
  color: var(--color-transition);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tension-center strong {
  font-size: 1.14rem;
  line-height: 1.35;
}

.tension-word {
  position: absolute;
  padding: 4px 7px;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-soft);
  background: var(--bg-raised);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  text-align: center;
}

.word-n { top: -10px; left: 50%; transform: translateX(-50%); }
.word-e { top: 50%; right: -14px; transform: translateY(-50%); }
.word-s { bottom: -10px; left: 50%; transform: translateX(-50%); }
.word-w { top: 50%; left: -18px; transform: translateY(-50%); }
.word-ne { top: 14%; right: 3%; }
.word-sw { bottom: 14%; left: -1%; }

.statement {
  position: relative;
  display: grid;
  grid-template-columns: 65px 1fr;
  gap: 22px;
  align-items: center;
  margin: 36px 0 0;
  padding: 34px 42px;
  overflow: hidden;
  border: 1px solid rgba(var(--color-transition-rgb), 0.22);
  border-radius: var(--radius-lg);
  background: linear-gradient(100deg, rgba(var(--color-transition-rgb), 0.07), rgba(var(--color-a-rgb), 0.025));
}

.statement-mark {
  color: var(--color-transition);
  font-family: Georgia, serif;
  font-size: 5rem;
  line-height: 0.7;
}

.statement p {
  max-width: 930px;
  margin: 0;
  color: var(--text-soft);
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  line-height: 1.55;
}

.chapter-notes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1px;
  margin-top: 42px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--border);
}

.chapter-notes article {
  min-height: 140px;
  padding: 23px;
  background: rgba(8, 19, 29, 0.96);
}

.chapter-notes p {
  margin: 13px 0 0;
  color: var(--text-soft);
  font-size: 0.83rem;
  line-height: 1.6;
}

.note-type.decision {
  color: var(--color-target);
}

.note-type.question {
  color: var(--color-transition);
}

.note-type.risk {
  color: var(--color-risk);
}

.architecture-duo {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 25px;
}

.architecture-board {
  position: relative;
  padding: 30px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.board-a {
  box-shadow: inset 0 2px 0 rgba(var(--color-a-rgb), 0.7), var(--shadow-panel);
}

.board-b {
  box-shadow: inset 0 2px 0 rgba(var(--color-b-rgb), 0.7), var(--shadow-panel);
}

.architecture-board > header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.board-number {
  display: grid;
  width: 43px;
  height: 43px;
  place-items: center;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.board-a .board-number {
  color: var(--color-a);
  background: rgba(var(--color-a-rgb), 0.11);
}

.board-b .board-number {
  color: var(--color-b);
  background: rgba(var(--color-b-rgb), 0.11);
}

.vertical-stack,
.target-flow,
.transition-diagram {
  display: flex;
  align-items: center;
  flex-direction: column;
}

.vertical-stack {
  padding: 27px 14px;
}

.system-node {
  position: relative;
  z-index: 1;
  display: grid;
  width: min(100%, 290px);
  min-height: 55px;
  align-content: center;
  padding: 10px 16px;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  background: var(--surface-strong);
  text-align: left;
}

.system-node small {
  margin-bottom: 2px;
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.53rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.system-node strong {
  font-size: 0.79rem;
  letter-spacing: -0.01em;
}

.system-node.wide {
  width: min(100%, 430px);
}

.customer-node {
  color: var(--customer);
  border-radius: 999px;
  background: rgba(244, 239, 229, 0.07);
  text-align: center;
}

.a-node {
  border-left: 3px solid var(--color-a);
}

.b-node {
  border-left: 3px solid var(--color-b);
}

.legacy-node {
  border-left: 3px dashed var(--color-transition);
  background:
    repeating-linear-gradient(135deg, transparent 0 9px, rgba(var(--color-transition-rgb), 0.025) 9px 18px),
    var(--surface-strong);
}

.neutral-node {
  border-left: 3px solid var(--neutral);
}

.target-node {
  border-left: 3px solid var(--color-target);
  box-shadow: inset 0 0 25px rgba(var(--color-target-rgb), 0.035);
}

.flow-down {
  position: relative;
  display: block;
  width: 1px;
  height: 21px;
  background: var(--border-bright);
}

.flow-down::after {
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 6px;
  height: 6px;
  border-right: 1px solid var(--muted);
  border-bottom: 1px solid var(--muted);
  content: "";
  transform: translate(-50%, -1px) rotate(45deg);
}

.property-cloud,
.tag-row,
.state-facts,
.role-cloud,
.routing-inputs,
.impact-row,
.final-crosscut {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.property-cloud {
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.property-cloud span,
.tag-row span,
.state-facts span,
.role-cloud span,
.routing-inputs span,
.impact-row span,
.final-crosscut span {
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.025);
  font-family: var(--font-mono);
  font-size: 0.57rem;
}

.compare-control {
  display: flex;
  justify-content: center;
  margin-top: 26px;
}

.outline-button,
.primary-button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 17px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
  transition: transform 180ms var(--ease), border-color 180ms ease, background 180ms ease;
}

.outline-button {
  border: 1px solid var(--border-bright);
  color: var(--text-soft);
  background: rgba(255, 255, 255, 0.025);
}

.outline-button:hover {
  border-color: var(--color-a);
  background: rgba(var(--color-a-rgb), 0.07);
  transform: translateY(-1px);
}

.outline-button[aria-expanded="true"] {
  color: var(--color-a);
  border-color: rgba(var(--color-a-rgb), 0.55);
  background: rgba(var(--color-a-rgb), 0.08);
}

.primary-button {
  border: 1px solid var(--color-target);
  color: var(--bg-deep);
  background: var(--color-target);
}

.button-symbol {
  font-size: 1.15rem;
}

.comparison-panel {
  margin-top: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  animation: panel-in 280ms var(--ease) both;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-bright) var(--bg-raised);
}

table {
  width: 100%;
  min-width: 790px;
  border-collapse: collapse;
  color: var(--text-soft);
  font-size: 0.77rem;
}

caption {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

th,
td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

thead th {
  color: var(--muted);
  background: rgba(255, 255, 255, 0.025);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

tbody th {
  color: var(--text);
  font-weight: 650;
}

tbody tr:last-child th,
tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover {
  background: rgba(var(--color-a-rgb), 0.025);
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.principle-card {
  position: relative;
  min-height: 270px;
  padding: 27px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  transition: transform 220ms var(--ease), border-color 220ms ease, background 220ms ease;
}

.principle-card:hover {
  border-color: var(--border-bright);
  background: var(--surface-hover);
  transform: translateY(-3px);
}

.principle-card.featured {
  grid-column: span 2;
  background: linear-gradient(135deg, rgba(var(--color-a-rgb), 0.11), var(--surface));
}

.principle-card.warning-edge {
  border-bottom-color: rgba(var(--color-transition-rgb), 0.6);
}

.principle-number {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.6rem;
}

.principle-icon {
  position: absolute;
  top: 20px;
  right: 22px;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.principle-card h3 {
  max-width: 330px;
  margin: 48px 0 15px;
  font-size: 1.3rem;
}

.principle-card p {
  max-width: 520px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.65;
}

.tag-row {
  position: absolute;
  right: 27px;
  bottom: 25px;
  left: 27px;
}

.guardrail-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  margin-top: 22px;
  padding: 22px 26px;
  border: 1px solid rgba(var(--color-target-rgb), 0.2);
  border-radius: var(--radius-md);
  background: rgba(var(--color-target-rgb), 0.045);
}

.guardrail-bar > span {
  color: var(--color-target);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.guardrail-bar p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.84rem;
}

.guardrail-bar strong {
  color: var(--color-target);
  font-size: 0.76rem;
}

.target-architecture {
  padding: 26px;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(rgba(135, 160, 183, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(135, 160, 183, 0.035) 1px, transparent 1px),
    rgba(6, 16, 25, 0.86);
  background-size: 32px 32px;
  box-shadow: var(--shadow-panel);
}

.architecture-caption {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding-bottom: 19px;
  border-bottom: 1px solid var(--border);
}

.owner-key {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.58rem;
}

.owner-key i {
  width: 15px;
  height: 3px;
  border-radius: 3px;
}

.owner-a-key i { background: var(--color-a); }
.owner-b-key i { background: var(--color-b); }
.owner-shared-key i { background: var(--neutral); }

.cross-cutting-rail {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 7px;
  margin: 22px 0;
  padding: 14px;
  border: 1px dashed var(--border-bright);
  border-radius: var(--radius-sm);
  background: rgba(118, 145, 162, 0.035);
}

.cross-cutting-rail span {
  padding: 6px 9px;
  border-radius: 4px;
  color: var(--text-soft);
  background: rgba(255, 255, 255, 0.035);
  font-family: var(--font-mono);
  font-size: 0.55rem;
}

.target-lanes {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 58px minmax(0, 1fr);
  gap: 12px;
}

.owner-lane {
  display: flex;
  min-height: 580px;
  flex-direction: column;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(11, 25, 38, 0.9);
}

.lane-a {
  border-top: 2px solid var(--color-a);
}

.lane-b {
  border-top: 2px solid var(--color-b);
}

.owner-lane > header {
  display: grid;
  gap: 3px;
  margin-bottom: 20px;
}

.owner-lane > header span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.56rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.owner-lane > header strong {
  font-size: 0.98rem;
}

.target-flow {
  flex: 1;
  justify-content: center;
}

.compact-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
  margin-top: 19px;
}

.compact-list li {
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--muted);
  font-size: 0.63rem;
}

.service-boundary {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-boundary i {
  position: absolute;
  top: 40px;
  bottom: 40px;
  left: 50%;
  border-left: 1px dashed var(--color-transition);
}

.service-boundary span {
  position: relative;
  z-index: 1;
  padding: 10px 7px;
  color: var(--color-transition);
  background: var(--bg-raised);
  font-family: var(--font-mono);
  font-size: 0.49rem;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.saas-box {
  flex: 1;
  padding: 18px;
  border: 2px solid rgba(var(--color-b-rgb), 0.46);
  border-radius: var(--radius-md);
  background: rgba(var(--color-b-rgb), 0.045);
}

.saas-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 13px;
  border-bottom: 1px solid rgba(var(--color-b-rgb), 0.18);
}

.saas-heading small {
  color: var(--color-b);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  text-transform: uppercase;
}

.saas-heading span {
  padding: 3px 6px;
  border: 1px solid rgba(var(--color-target-rgb), 0.3);
  border-radius: 999px;
  color: var(--color-target);
  font-family: var(--font-mono);
  font-size: 0.5rem;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding-top: 15px;
}

.service-grid span {
  display: grid;
  min-height: 48px;
  place-items: center;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-soft);
  background: rgba(8, 18, 29, 0.64);
  font-size: 0.64rem;
  text-align: center;
}

.boundary-contract {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--border);
}

.boundary-contract > div {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 13px;
  padding: 20px;
  background: var(--bg-raised);
}

.boundary-contract span {
  color: var(--color-transition);
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.boundary-contract p {
  display: grid;
  gap: 3px;
  margin: 0;
  color: var(--muted);
  font-size: 0.7rem;
}

.boundary-contract strong {
  color: var(--text);
  font-size: 0.78rem;
}

.state-tabs {
  overflow: hidden;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg);
  background: rgba(7, 17, 27, 0.9);
  box-shadow: var(--shadow-panel);
}

.tab-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 7px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.018);
}

.tab-list button {
  min-height: 48px;
  border: 0;
  border-radius: var(--radius-sm);
  color: var(--muted);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  cursor: pointer;
}

.tab-list button[aria-selected="true"] {
  color: var(--color-transition);
  background: rgba(var(--color-transition-rgb), 0.09);
  box-shadow: inset 0 0 0 1px rgba(var(--color-transition-rgb), 0.22);
}

.tab-stage {
  min-height: 610px;
}

.tab-panel {
  padding: 34px;
  animation: panel-in 300ms var(--ease) both;
}

.state-summary {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: start;
  max-width: 690px;
  margin: 0 auto 36px;
}

.state-index {
  color: var(--color-transition);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.state-summary h3 {
  margin: 4px 0 9px;
  font-size: 1.65rem;
}

.state-summary p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.today-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 130px minmax(0, 1fr);
  align-items: center;
  max-width: 930px;
  margin: 0 auto;
}

.silo {
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 9px;
  padding: 25px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.silo-a { border-top: 2px solid var(--color-a); }
.silo-b { border-top: 2px solid var(--color-b); }

.silo strong {
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
}

.silo span {
  width: 100%;
  padding: 9px;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-soft);
  background: rgba(255, 255, 255, 0.025);
  font-size: 0.72rem;
  text-align: center;
}

.silo i {
  width: 1px;
  height: 10px;
  background: var(--border-bright);
}

.silo-gap {
  position: relative;
  display: grid;
  height: 100%;
  place-items: center;
}

.silo-gap::before,
.silo-gap::after {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  border-left: 1px dashed rgba(var(--color-risk-rgb), 0.35);
  content: "";
}

.silo-gap::before { left: 33%; }
.silo-gap::after { right: 33%; }

.silo-gap span {
  z-index: 1;
  padding: 7px;
  color: var(--color-risk);
  background: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.48rem;
  text-align: center;
  text-transform: uppercase;
}

.state-facts {
  justify-content: center;
  margin-top: 31px;
}

.transition-diagram {
  max-width: 960px;
  margin: 0 auto;
}

.transition-diagram > .system-node {
  width: 235px;
  text-align: center;
}

.router-node {
  position: relative;
  z-index: 2;
  display: grid;
  width: 300px;
  min-height: 67px;
  align-content: center;
  padding: 10px 18px;
  overflow: hidden;
  border: 1px dashed var(--color-transition);
  border-radius: var(--radius-sm);
  background: rgba(var(--color-transition-rgb), 0.08);
  text-align: center;
}

.router-node small {
  color: var(--color-transition);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  text-transform: uppercase;
}

.router-node strong {
  font-size: 0.8rem;
}

.data-pulse {
  position: absolute;
  top: 0;
  left: -20px;
  width: 20px;
  height: 2px;
  background: var(--color-transition);
  box-shadow: 0 0 10px var(--color-transition);
  animation: route-pulse 4s linear infinite;
}

.route-fan {
  position: relative;
  width: 78%;
  height: 36px;
  border-right: 1px solid var(--border-bright);
  border-bottom: 1px solid var(--border-bright);
  border-left: 1px solid var(--border-bright);
}

.route-fan i {
  position: absolute;
  bottom: 0;
  width: 1px;
  height: 10px;
  background: var(--border-bright);
}

.route-fan i:nth-child(1) { left: 25%; }
.route-fan i:nth-child(2) { left: 50%; }
.route-fan i:nth-child(3) { left: 75%; }
.route-fan i:nth-child(4) { left: 100%; }

.route-targets {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.route-targets .system-node {
  min-width: 0;
  text-align: center;
}

.compact-chain {
  display: flex;
  max-width: 950px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  margin: 100px auto 0;
}

.compact-chain span {
  padding: 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-soft);
  background: var(--surface-strong);
  font-size: 0.7rem;
  text-align: center;
}

.compact-chain i {
  color: var(--muted);
  font-style: normal;
}

.a-fill { border-left: 3px solid var(--color-a) !important; }
.b-fill { border-left: 3px solid var(--color-b) !important; }
.target-fill { border-left: 3px solid var(--color-target) !important; }

.transition-controls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 20px;
}

.transition-controls article {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.control-state {
  display: inline-block;
  padding: 4px 7px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.52rem;
  text-transform: uppercase;
}

.control-state.live { color: var(--color-a); background: rgba(var(--color-a-rgb), 0.08); }
.control-state.governed { color: var(--color-transition); background: rgba(var(--color-transition-rgb), 0.08); }
.control-state.retire { color: var(--color-target); background: rgba(var(--color-target-rgb), 0.08); }

.transition-controls h3 {
  margin: 18px 0 10px;
  font-size: 1rem;
}

.transition-controls p {
  color: var(--muted);
  font-size: 0.75rem;
}

.identity-model {
  position: relative;
  min-height: 570px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at center, rgba(var(--color-transition-rgb), 0.075), transparent 19rem),
    var(--surface);
}

.identity-model::before,
.identity-model::after {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px dashed rgba(132, 158, 181, 0.15);
  border-radius: 50%;
  content: "";
  transform: translate(-50%, -50%);
}

.identity-model::before { width: 360px; height: 360px; }
.identity-model::after { width: 510px; height: 510px; }

.identity-core {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 4;
  display: grid;
  width: 176px;
  height: 176px;
  place-content: center;
  border: 1px solid rgba(var(--color-transition-rgb), 0.55);
  border-radius: 50%;
  background: var(--bg-raised);
  text-align: center;
  box-shadow: 0 0 50px rgba(var(--color-transition-rgb), 0.1);
  transform: translate(-50%, -50%);
}

.identity-core small {
  color: var(--color-transition);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  text-transform: uppercase;
}

.identity-core strong {
  margin: 7px 0;
  font-size: 1.18rem;
  line-height: 1.15;
}

.identity-core em {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.45rem;
  font-style: normal;
}

.core-ring {
  position: absolute;
  top: 50%;
  width: 92px;
  height: 92px;
  border-radius: 50%;
  transform: translateY(-50%);
}

.ring-a { left: 10px; border: 1px solid var(--color-a); }
.ring-b { right: 10px; border: 1px solid var(--color-b); }

.identity-spoke {
  position: absolute;
  z-index: 3;
  display: grid;
  width: 180px;
  min-height: 70px;
  align-content: center;
  padding: 12px 16px;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  background: var(--surface-strong);
  text-align: center;
}

.identity-spoke::after {
  position: absolute;
  z-index: -1;
  width: 82px;
  height: 1px;
  background: var(--border-bright);
  content: "";
}

.identity-spoke span {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  text-transform: uppercase;
}

.identity-spoke strong {
  font-size: 0.77rem;
}

.spoke-1 { top: 12%; left: 12%; border-left: 3px solid var(--color-a); }
.spoke-1::after { right: -68px; bottom: -28px; transform: rotate(35deg); }
.spoke-2 { top: 12%; right: 12%; border-left: 3px solid var(--color-b); }
.spoke-2::after { bottom: -28px; left: -68px; transform: rotate(-35deg); }
.spoke-3 { top: 44%; left: 5%; border-left: 3px solid var(--color-a); }
.spoke-3::after { top: 50%; right: -80px; }
.spoke-4 { top: 44%; right: 5%; border-left: 3px solid var(--color-b); }
.spoke-4::after { top: 50%; left: -80px; }
.spoke-5 { bottom: 10%; left: 15%; border-left: 3px solid var(--color-transition); }
.spoke-5::after { top: -25px; right: -65px; transform: rotate(-38deg); }
.spoke-6 { right: 15%; bottom: 10%; border-left: 3px solid var(--neutral); }
.spoke-6::after { top: -25px; left: -65px; transform: rotate(38deg); }

.identity-roles {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 24px;
  margin-top: 18px;
  padding: 18px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
}

.identity-roles p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.75rem;
  font-weight: 650;
}

.migration-sequence {
  margin-top: 42px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.migration-sequence > header,
.decision-flow > header {
  padding: 25px 28px;
  border-bottom: 1px solid var(--border);
}

.migration-sequence h3,
.decision-flow h3 {
  margin: 5px 0 0;
  font-size: 1.4rem;
}

.migration-sequence ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--border);
  list-style: none;
}

.migration-sequence li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 13px;
  min-height: 88px;
  padding: 17px 20px;
  background: var(--bg-raised);
}

.migration-sequence li > span {
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.6rem;
}

.migration-sequence li p {
  display: grid;
  gap: 3px;
  margin: 0;
  font-size: 0.79rem;
  font-weight: 650;
}

.migration-sequence li small {
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 400;
}

.option-comparison {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 15px;
  margin-top: 42px;
}

.option-card {
  position: relative;
  padding: 25px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.option-card.recommended {
  border-color: rgba(var(--color-transition-rgb), 0.55);
  background: linear-gradient(150deg, rgba(var(--color-transition-rgb), 0.08), var(--surface));
}

.recommendation {
  position: absolute;
  top: -10px;
  right: 15px;
  padding: 4px 8px;
  border: 1px solid rgba(var(--color-transition-rgb), 0.45);
  border-radius: 999px;
  color: var(--color-transition);
  background: var(--bg-raised);
  font-family: var(--font-mono);
  font-size: 0.48rem;
  text-transform: uppercase;
}

.option-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.option-head > span {
  display: grid;
  width: 37px;
  height: 37px;
  place-items: center;
  border: 1px solid var(--border-bright);
  border-radius: 50%;
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.65rem;
}

.option-head small {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.51rem;
  text-transform: uppercase;
}

.option-card h3 {
  margin: 24px 0 18px;
  font-size: 1.17rem;
}

.pros-cons {
  display: grid;
  gap: 11px;
}

.pros-cons p {
  margin: 0;
  color: var(--muted);
  font-size: 0.7rem;
}

.pros-cons p:first-child strong { color: var(--color-target); }
.pros-cons p:last-child strong { color: var(--color-risk); }

.context-note {
  margin: 18px 0 0;
  padding: 18px 21px;
  border-left: 2px solid var(--color-transition);
  color: var(--muted);
  background: rgba(var(--color-transition-rgb), 0.035);
  font-size: 0.78rem;
}

.context-note strong {
  color: var(--color-transition);
}

.portal-stages {
  position: relative;
  display: grid;
  gap: 12px;
  max-width: 980px;
  margin: 0 auto;
}

.portal-stages::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 28px;
  width: 1px;
  background: linear-gradient(var(--color-a), var(--color-transition), var(--color-target));
  content: "";
}

.portal-stage {
  position: relative;
  display: grid;
  grid-template-columns: 58px 1fr auto;
  align-items: center;
  gap: 18px;
  min-height: 126px;
  margin-left: calc(var(--stage-indent, 0) * 26px);
  padding: 20px 22px 20px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.portal-stage:nth-child(2) { --stage-indent: 1; }
.portal-stage:nth-child(3) { --stage-indent: 2; }
.portal-stage:nth-child(4) { --stage-indent: 3; }

.stage-no {
  position: relative;
  z-index: 1;
  display: grid;
  width: 56px;
  height: 56px;
  place-items: center;
  border: 1px solid var(--color-a);
  border-radius: 50%;
  color: var(--color-a);
  background: var(--bg-raised);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  transform: translateX(-1px);
}

.portal-stage:nth-child(2) .stage-no { color: #78cfd5; border-color: #78cfd5; }
.portal-stage:nth-child(3) .stage-no { color: var(--color-transition); border-color: var(--color-transition); }
.portal-stage:nth-child(4) .stage-no { color: var(--color-target); border-color: var(--color-target); }

.portal-stage small {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  text-transform: uppercase;
}

.portal-stage h3 {
  margin: 4px 0 8px;
  font-size: 1.12rem;
}

.portal-stage p {
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
}

.stage-state {
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  text-transform: uppercase;
}

.target-stage {
  border-color: rgba(var(--color-target-rgb), 0.34);
  background: linear-gradient(90deg, rgba(var(--color-target-rgb), 0.05), var(--surface));
}

.target-stage .stage-state {
  color: var(--color-target);
  border-color: rgba(var(--color-target-rgb), 0.35);
}

.coverage-matrix {
  margin-top: 46px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.matrix-heading {
  padding: 25px 28px;
  border-bottom: 1px solid var(--border);
}

.matrix-heading h3 {
  margin: 6px 0 0;
  font-size: 1.28rem;
}

.matrix-dot {
  display: inline-flex;
  min-height: 25px;
  align-items: center;
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.5rem;
}

.matrix-dot.yes,
.matrix-dot.ready { color: var(--color-target); border-color: rgba(var(--color-target-rgb), 0.3); background: rgba(var(--color-target-rgb), 0.05); }
.matrix-dot.progress { color: var(--color-transition); border-color: rgba(var(--color-transition-rgb), 0.3); }
.matrix-dot.no { color: var(--color-risk); border-color: rgba(var(--color-risk-rgb), 0.26); }
.matrix-dot.partial { color: var(--muted); }

.matrix-disclaimer,
.criteria-disclaimer {
  margin: 0;
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  color: var(--faint);
  font-size: 0.64rem;
}

.portal-rule {
  display: flex;
  align-items: center;
  gap: 17px;
  margin-top: 20px;
  padding: 20px 23px;
  border: 1px solid rgba(var(--color-a-rgb), 0.22);
  border-radius: var(--radius-md);
  background: rgba(var(--color-a-rgb), 0.04);
}

.portal-rule > span {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  place-items: center;
  border: 1px solid rgba(var(--color-a-rgb), 0.35);
  border-radius: 50%;
  color: var(--color-a);
}

.portal-rule small {
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  text-transform: uppercase;
}

.portal-rule p {
  margin: 3px 0 0;
  color: var(--text-soft);
  font-size: 0.87rem;
}

.layer-model {
  display: grid;
  gap: 8px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.layer-row {
  display: grid;
  grid-template-columns: 50px minmax(190px, 0.75fr) 1.3fr 40px;
  align-items: center;
  gap: 17px;
  min-height: 94px;
  padding: 15px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
}

.layer-code {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.57rem;
}

.layer-row small {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  text-transform: uppercase;
}

.layer-row h3 {
  margin: 4px 0 0;
  font-size: 0.97rem;
}

.layer-row p {
  margin: 0;
  color: var(--muted);
  font-size: 0.72rem;
}

.layer-owner {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.56rem;
}

.layer-frontend,
.layer-bff,
.layer-middleware { border-left: 3px solid var(--color-a); }
.layer-services { border-left: 3px solid var(--color-b); }
.layer-core { border-left: 3px solid var(--color-target); }
.layer-frontend .layer-owner,
.layer-bff .layer-owner,
.layer-middleware .layer-owner { color: var(--color-a); }
.layer-services .layer-owner,
.layer-core .layer-owner { color: var(--color-b); }

.responsibility-panels {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 17px;
  margin-top: 20px;
}

.responsibility-panels > article {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.responsibility-panels header {
  display: flex;
  align-items: center;
  gap: 15px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.tech-mark {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border: 1px solid var(--color-a);
  border-radius: var(--radius-sm);
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.65rem;
}

.responsibility-panels header small {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  text-transform: uppercase;
}

.responsibility-panels header h3 {
  margin: 3px 0 0;
  font-size: 1.08rem;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 16px;
  padding-top: 20px;
}

.feature-list li {
  position: relative;
  padding-left: 14px;
  color: var(--muted);
  font-size: 0.7rem;
}

.feature-list li::before {
  position: absolute;
  top: 0.6em;
  left: 0;
  width: 5px;
  height: 1px;
  background: var(--color-a);
  content: "";
}

.architecture-warning {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 17px;
  margin-top: 20px;
  padding: 22px;
  border: 1px solid rgba(var(--color-risk-rgb), 0.3);
  border-radius: var(--radius-md);
  background: rgba(var(--color-risk-rgb), 0.055);
}

.warning-symbol {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--color-risk);
  border-radius: 50%;
  color: var(--color-risk);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.architecture-warning small {
  color: var(--color-risk);
  font-family: var(--font-mono);
  font-size: 0.53rem;
  text-transform: uppercase;
}

.architecture-warning p {
  margin: 4px 0 0;
  color: var(--text-soft);
  font-size: 0.86rem;
}

.glossary-inline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 17px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.018);
}

.glossary-inline p {
  margin: 0 8px 0 0;
  color: var(--muted);
  font-size: 0.7rem;
}

.glossary-inline button {
  min-height: 34px;
  padding: 5px 9px;
  border: 1px dashed var(--border-bright);
  border-radius: 5px;
  color: var(--text-soft);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.57rem;
  cursor: pointer;
}

.glossary-inline button:hover {
  color: var(--color-a);
  border-color: var(--color-a);
  background: rgba(var(--color-a-rgb), 0.05);
}

.mixed-customer-card {
  max-width: 840px;
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-panel);
}

.mixed-customer-card > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 25px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.mixed-customer-card > header > div {
  display: flex;
  align-items: center;
  gap: 13px;
}

.customer-avatar {
  display: grid;
  width: 45px;
  height: 45px;
  place-items: center;
  border: 1px solid rgba(var(--color-transition-rgb), 0.5);
  border-radius: 50%;
  color: var(--color-transition);
  background: rgba(var(--color-transition-rgb), 0.06);
  font-family: var(--font-mono);
  font-size: 0.64rem;
}

.mixed-customer-card header small {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  text-transform: uppercase;
}

.mixed-customer-card header h3 {
  margin: 2px 0 0;
  font-size: 1.13rem;
}

.status-chip {
  display: inline-flex;
  min-height: 25px;
  align-items: center;
  justify-content: center;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.49rem;
  font-weight: 600;
  text-transform: uppercase;
  white-space: nowrap;
}

.status-transition,
.status-progress { color: var(--color-transition); border-color: rgba(var(--color-transition-rgb), 0.35); background: rgba(var(--color-transition-rgb), 0.055); }
.status-decided { color: var(--color-target); border-color: rgba(var(--color-target-rgb), 0.35); background: rgba(var(--color-target-rgb), 0.055); }
.status-open { color: var(--muted); border-color: var(--border-bright); }
.status-critical { color: var(--color-risk); border-color: rgba(var(--color-risk-rgb), 0.38); background: rgba(var(--color-risk-rgb), 0.055); }

.customer-tree {
  padding: 14px 25px 24px;
}

.customer-tree > div {
  display: grid;
  grid-template-columns: minmax(150px, auto) 1fr minmax(140px, auto);
  align-items: center;
  gap: 12px;
  min-height: 48px;
  border-bottom: 1px solid var(--border);
}

.customer-tree > div:last-child {
  border-bottom: 0;
}

.tree-label {
  color: var(--muted);
  font-size: 0.72rem;
}

.customer-tree i {
  height: 1px;
  background: linear-gradient(90deg, var(--border), var(--border-bright));
}

.customer-tree strong {
  font-size: 0.69rem;
  text-align: right;
}

.a-text { color: var(--color-a); }
.b-text { color: var(--color-b); }
.transition-text { color: var(--color-transition); }

.decision-flow {
  margin-top: 35px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.decision-flow ol {
  display: grid;
  grid-template-columns: repeat(8, minmax(115px, 1fr));
  margin: 0;
  padding: 22px;
  overflow-x: auto;
  list-style: none;
}

.decision-flow li {
  position: relative;
  min-height: 115px;
  padding: 14px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
}

.decision-flow li:not(:last-child)::after {
  position: absolute;
  top: 50%;
  right: -5px;
  z-index: 2;
  width: 8px;
  height: 8px;
  border-top: 1px solid var(--color-transition);
  border-right: 1px solid var(--color-transition);
  background: var(--bg-raised);
  content: "";
  transform: translateY(-50%) rotate(45deg);
}

.decision-flow li span {
  color: var(--color-transition);
  font-family: var(--font-mono);
  font-size: 0.52rem;
}

.decision-flow li p {
  margin: 25px 0 0;
  color: var(--text-soft);
  font-size: 0.68rem;
  line-height: 1.35;
}

.routing-simulator {
  margin-top: 44px;
  overflow: hidden;
  border: 1px solid rgba(var(--color-transition-rgb), 0.35);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(var(--color-transition-rgb), 0.045), var(--surface));
  box-shadow: var(--shadow-panel);
}

.simulator-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 27px 30px;
  border-bottom: 1px solid var(--border);
}

.simulator-heading .eyebrow {
  display: block;
  margin-bottom: 5px;
  color: var(--color-transition);
}

.simulator-heading h3 {
  margin: 0 0 8px;
  font-size: 1.5rem;
}

.simulator-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
}

.sim-live {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--color-target);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  text-transform: uppercase;
}

.sim-live i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-target);
}

.simulator-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
}

.sim-controls {
  display: grid;
  gap: 21px;
  padding: 28px 30px;
  border-right: 1px solid var(--border);
}

.sim-controls fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.sim-controls legend {
  margin-bottom: 8px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.57rem;
  text-transform: uppercase;
}

.segmented-control {
  display: grid;
  grid-auto-columns: 1fr;
  grid-auto-flow: column;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(3, 10, 16, 0.4);
}

.segmented-control button {
  min-height: 41px;
  padding: 8px;
  border: 0;
  border-radius: 5px;
  color: var(--muted);
  background: transparent;
  font-size: 0.66rem;
  cursor: pointer;
}

.segmented-control button[aria-pressed="true"] {
  color: var(--text);
  background: var(--surface-hover);
  box-shadow: inset 0 0 0 1px var(--border-bright);
}

.switch-control {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.switch-control > span {
  display: grid;
  gap: 2px;
}

.switch-control strong {
  font-size: 0.68rem;
}

.switch-control small {
  color: var(--muted);
  font-size: 0.58rem;
}

.switch-control input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.switch-control i {
  position: relative;
  width: 40px;
  height: 22px;
  flex: 0 0 40px;
  border: 1px solid var(--border-bright);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
}

.switch-control i::after {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--muted);
  content: "";
  transition: transform 180ms var(--ease), background 180ms ease;
}

.switch-control input:checked + i {
  border-color: rgba(var(--color-risk-rgb), 0.5);
  background: rgba(var(--color-risk-rgb), 0.1);
}

.switch-control input:checked + i::after {
  background: var(--color-risk);
  transform: translateX(18px);
}

.switch-control:focus-within {
  outline: 3px solid var(--color-transition);
  outline-offset: 4px;
}

.sim-output {
  padding: 30px;
  background: rgba(5, 14, 22, 0.55);
}

.sim-route-visual {
  display: grid;
  grid-template-columns: auto 30px auto 30px 1fr 1fr;
  align-items: center;
  gap: 6px;
  margin-bottom: 29px;
}

.sim-route-visual > i {
  height: 1px;
  background: var(--border-bright);
}

.sim-node {
  display: grid;
  min-height: 44px;
  place-items: center;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--faint);
  background: var(--bg-raised);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  transition: opacity 200ms ease, border-color 200ms ease, color 200ms ease, box-shadow 200ms ease;
}

.sim-node:not(.active) {
  opacity: 0.32;
}

.sim-node.active {
  color: var(--text);
  border-color: var(--border-bright);
}

.sim-node.sys-a.active {
  color: var(--color-a);
  border-color: var(--color-a);
  box-shadow: 0 0 18px rgba(var(--color-a-rgb), 0.08);
}

.sim-node.sys-b.active {
  color: var(--color-b);
  border-color: var(--color-b);
  box-shadow: 0 0 18px rgba(var(--color-b-rgb), 0.08);
}

.sim-node.unavailable {
  color: var(--color-risk);
  border-color: var(--color-risk);
  opacity: 0.7;
  background: repeating-linear-gradient(135deg, rgba(var(--color-risk-rgb), 0.02) 0 5px, rgba(var(--color-risk-rgb), 0.09) 5px 10px);
}

.sim-result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.sim-result-head small {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.49rem;
}

.sim-output h4 {
  margin: 22px 0 11px;
  font-size: 1.32rem;
}

.sim-output > p {
  color: var(--muted);
  font-size: 0.75rem;
}

.sim-facts {
  display: grid;
  gap: 1px;
  margin-top: 25px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--border);
}

.sim-facts > div {
  display: grid;
  grid-template-columns: 42% 1fr;
  gap: 12px;
  padding: 11px 13px;
  background: var(--bg-raised);
}

.sim-facts dt {
  color: var(--faint);
  font-size: 0.62rem;
}

.sim-facts dd {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.62rem;
  text-align: right;
}

.routing-inputs {
  justify-content: center;
  margin-top: 18px;
  padding: 17px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
}

.roadmap-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 23px;
}

.roadmap-filter button {
  min-height: 39px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  font-size: 0.64rem;
  cursor: pointer;
}

.roadmap-filter button[aria-pressed="true"] {
  color: var(--bg-deep);
  border-color: var(--color-transition);
  background: var(--color-transition);
}

.roadmap {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 15px;
}

.roadmap-axis {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: auto 1fr auto 1fr auto;
  align-items: center;
  gap: 11px;
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  text-transform: uppercase;
}

.roadmap-axis i {
  height: 1px;
  background: linear-gradient(90deg, var(--color-a), var(--color-transition));
}

.roadmap-axis i:last-of-type {
  background: linear-gradient(90deg, var(--color-transition), var(--color-target));
}

.roadmap-phase {
  display: flex;
  min-height: 680px;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.phase-one { border-top: 2px solid var(--color-a); }
.phase-two { border-top: 2px solid var(--color-transition); }
.phase-three { border-top: 2px solid var(--color-target); }

.roadmap-phase header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding-bottom: 19px;
  border-bottom: 1px solid var(--border);
}

.phase-index {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.phase-two .phase-index { color: var(--color-transition); }
.phase-three .phase-index { color: var(--color-target); }

.roadmap-phase header small {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  text-transform: uppercase;
}

.roadmap-phase h3 {
  margin: 4px 0 0;
  font-size: 1.07rem;
}

.phase-goal {
  min-height: 74px;
  margin: 20px 0;
  color: var(--text-soft);
  font-size: 0.73rem;
}

.roadmap-phase ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.roadmap-phase li {
  position: relative;
  min-height: 41px;
  padding: 10px 10px 10px 28px;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.018);
  font-size: 0.65rem;
  transition: opacity 180ms ease, border-color 180ms ease, color 180ms ease, background 180ms ease;
}

.roadmap-phase li::before {
  position: absolute;
  top: 15px;
  left: 12px;
  width: 6px;
  height: 6px;
  border: 1px solid currentColor;
  border-radius: 50%;
  content: "";
}

.roadmap.is-filtered li:not(.roadmap-match) {
  opacity: 0.18;
}

.roadmap.is-filtered li.roadmap-match {
  color: var(--text);
  border-color: rgba(var(--color-transition-rgb), 0.44);
  background: rgba(var(--color-transition-rgb), 0.06);
}

.phase-gate {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  margin-top: auto;
  padding-top: 20px;
}

.phase-gate span {
  color: var(--color-transition);
  font-family: var(--font-mono);
  font-size: 0.52rem;
}

.phase-gate p {
  margin: 0;
  color: var(--muted);
  font-size: 0.62rem;
}

.dependency-chain {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 21px;
  padding: 20px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  white-space: nowrap;
}

.dependency-chain span {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-soft);
  font-family: var(--font-mono);
  font-size: 0.55rem;
}

.dependency-chain i {
  color: var(--color-transition);
  font-style: normal;
}

.innovation-stack {
  overflow: hidden;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-panel);
}

.innovation-layer {
  padding: 28px;
  background: linear-gradient(140deg, rgba(var(--color-a-rgb), 0.08), rgba(var(--color-b-rgb), 0.05));
}

.innovation-layer > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  margin-bottom: 20px;
}

.innovation-layer > header span {
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.63rem;
  text-transform: uppercase;
}

.innovation-layer > header small {
  color: var(--muted);
  font-size: 0.57rem;
}

.innovation-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.innovation-grid article {
  min-height: 102px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(6, 16, 25, 0.65);
}

.innovation-grid span {
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.5rem;
}

.innovation-grid p {
  margin: 26px 0 0;
  color: var(--text-soft);
  font-size: 0.66rem;
  line-height: 1.35;
}

.abstraction-layer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 15px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(var(--color-transition-rgb), 0.045);
}

.abstraction-layer span {
  padding: 7px 10px;
  border: 1px solid rgba(var(--color-transition-rgb), 0.28);
  border-radius: 5px;
  color: var(--color-transition);
  font-family: var(--font-mono);
  font-size: 0.55rem;
}

.abstraction-layer i {
  width: 50px;
  height: 1px;
  background: var(--color-transition);
}

.core-layer {
  display: grid;
  min-height: 150px;
  place-content: center;
  padding: 25px;
  text-align: center;
}

.core-layer small {
  color: var(--color-b);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  text-transform: uppercase;
}

.core-layer strong {
  margin: 7px 0;
  font-size: 1.32rem;
}

.core-layer span {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.5rem;
}

.innovation-equation {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1.25fr;
  align-items: center;
  gap: 14px;
  margin-top: 20px;
}

.innovation-equation > div {
  display: grid;
  min-height: 110px;
  place-content: center;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  text-align: center;
}

.innovation-equation > span {
  color: var(--color-transition);
  font-family: var(--font-mono);
}

.innovation-equation small {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.5rem;
  text-transform: uppercase;
}

.innovation-equation strong {
  margin-top: 4px;
  font-size: 0.83rem;
}

.innovation-equation .equation-result {
  border-color: rgba(var(--color-target-rgb), 0.3);
  background: rgba(var(--color-target-rgb), 0.045);
}

.equation-result strong {
  color: var(--color-target);
}

.innovation-rules {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 22px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--border);
}

.innovation-rules article {
  padding: 20px;
  background: var(--bg-raised);
}

.innovation-rules span {
  color: var(--color-target);
  font-family: var(--font-mono);
  font-size: 0.55rem;
}

.innovation-rules p {
  margin: 25px 0 0;
  color: var(--muted);
  font-size: 0.68rem;
}

.risk-eyebrow {
  color: var(--color-risk) !important;
}

.risk-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.risk-card,
.decision-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-left: 3px solid var(--color-risk);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.risk-card.wide-risk {
  grid-column: 1 / -1;
}

.risk-card > button,
.decision-card > button {
  display: grid;
  width: 100%;
  min-height: 95px;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 17px;
  padding: 17px 20px;
  border: 0;
  color: inherit;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.risk-card > button:hover,
.decision-card > button:hover {
  background: rgba(255, 255, 255, 0.025);
}

.risk-id {
  color: var(--color-risk);
  font-family: var(--font-mono);
  font-size: 0.55rem;
}

.risk-card button small,
.decision-card button small {
  display: block;
  margin-bottom: 3px;
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.49rem;
  text-transform: uppercase;
}

.risk-card button strong,
.decision-card button strong {
  display: block;
  font-size: 0.83rem;
  letter-spacing: -0.01em;
}

.risk-card button > i,
.decision-card button > i {
  position: relative;
  width: 20px;
  height: 20px;
}

.risk-card button > i::before,
.risk-card button > i::after,
.decision-card button > i::before,
.decision-card button > i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 1px;
  background: var(--muted);
  content: "";
  transition: transform 180ms var(--ease);
}

.risk-card button > i::after,
.decision-card button > i::after {
  transform: rotate(90deg);
}

.risk-card button[aria-expanded="true"] > i::after,
.decision-card button[aria-expanded="true"] > i::after {
  transform: rotate(0);
}

.accordion-panel {
  padding: 0 20px 20px;
  animation: panel-in 220ms var(--ease) both;
}

.risk-card .accordion-panel p {
  padding-top: 17px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.72rem;
}

.impact-row span {
  color: var(--color-risk);
  border-color: rgba(var(--color-risk-rgb), 0.24);
}

.anti-pattern-rule {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: center;
  margin-top: 20px;
  padding: 20px 22px;
  border: 1px solid rgba(var(--color-risk-rgb), 0.27);
  border-radius: var(--radius-md);
  background: rgba(var(--color-risk-rgb), 0.04);
}

.anti-pattern-rule span {
  color: var(--color-risk);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  text-transform: uppercase;
}

.anti-pattern-rule p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.8rem;
}

.decision-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 17px;
  margin-bottom: 18px;
}

.decision-legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 0.6rem;
}

.decision-legend i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.chip-decided { background: var(--color-target); }
.chip-progress { background: var(--color-transition); }
.chip-open { background: var(--muted); }
.chip-critical { background: var(--color-risk); }

.decision-map {
  display: grid;
  gap: 10px;
}

.decision-card {
  border-left-color: var(--color-a);
}

.decision-card > button {
  grid-template-columns: auto 1fr auto 25px;
}

.decision-glyph {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(var(--color-a-rgb), 0.4);
  border-radius: var(--radius-sm);
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.57rem;
}

.decision-card .accordion-panel {
  padding: 0;
  border-top: 1px solid var(--border);
}

.decision-card ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--border);
  list-style: none;
}

.decision-card li {
  display: flex;
  min-height: 66px;
  align-items: center;
  gap: 12px;
  padding: 13px 18px;
  color: var(--text-soft);
  background: var(--bg-raised);
  font-size: 0.69rem;
}

.decision-practice {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 21px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--border);
}

.decision-practice > div {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  padding: 20px;
  background: var(--bg-raised);
}

.decision-practice > div > span {
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.58rem;
}

.decision-practice p {
  display: grid;
  gap: 3px;
  margin: 0;
  color: var(--muted);
  font-size: 0.64rem;
}

.decision-practice strong {
  color: var(--text);
  font-size: 0.72rem;
}

.finale {
  padding-bottom: 50px;
  background:
    radial-gradient(circle at 50% 15%, rgba(var(--color-target-rgb), 0.075), transparent 32rem),
    linear-gradient(180deg, rgba(7, 18, 28, 0.9), var(--bg-deep));
}

.final-architecture {
  padding: 32px;
  border: 1px solid rgba(var(--color-target-rgb), 0.3);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(rgba(135, 160, 183, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(135, 160, 183, 0.035) 1px, transparent 1px),
    rgba(7, 18, 28, 0.82);
  background-size: 32px 32px;
  box-shadow: var(--shadow-panel);
}

.final-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 9px;
}

.final-flow > i {
  width: 17px;
  height: 1px;
  background: var(--color-target);
}

.final-node {
  position: relative;
  display: grid;
  min-height: 100px;
  align-content: center;
  padding: 15px;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  background: var(--surface-strong);
  text-align: center;
}

.final-node > span {
  position: absolute;
  top: 8px;
  left: 9px;
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.47rem;
}

.final-node small {
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.47rem;
  text-transform: uppercase;
}

.final-node strong {
  margin-top: 5px;
  font-size: 0.71rem;
}

.final-node.customer { border-radius: 999px; color: var(--customer); }
.final-node.owned-a { border-top: 3px solid var(--color-a); }
.final-node.owned-b { border-top: 3px solid var(--color-b); }
.final-node.target { border-top: 3px solid var(--color-target); }

.final-crosscut {
  justify-content: center;
  margin-top: 25px;
  padding-top: 20px;
  border-top: 1px dashed var(--border-bright);
}

.shutdown-ledger {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 17px;
  margin-top: 28px;
}

.shutdown-ledger article {
  padding: 27px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.ledger-out {
  background:
    repeating-linear-gradient(135deg, transparent 0 12px, rgba(var(--color-risk-rgb), 0.018) 12px 24px),
    var(--surface) !important;
}

.ledger-stay {
  border-color: rgba(var(--color-target-rgb), 0.24) !important;
}

.shutdown-ledger header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 21px;
}

.shutdown-ledger header span {
  display: grid;
  width: 33px;
  height: 33px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--font-mono);
}

.ledger-out header span { color: var(--color-risk); }
.ledger-stay header span { color: var(--color-target); }

.shutdown-ledger h3 {
  margin: 0;
  font-size: 1.08rem;
}

.shutdown-ledger ul {
  display: grid;
  gap: 10px;
}

.shutdown-ledger li {
  position: relative;
  padding: 0 0 10px 17px;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.72rem;
}

.shutdown-ledger li::before {
  position: absolute;
  top: 0.58em;
  left: 0;
  width: 6px;
  height: 1px;
  content: "";
}

.ledger-out li::before { background: var(--color-risk); }
.ledger-stay li::before { background: var(--color-target); }

.completion-criteria {
  margin-top: 27px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.completion-criteria > header {
  padding: 25px 28px;
  border-bottom: 1px solid var(--border);
}

.completion-criteria h3 {
  margin: 6px 0 0;
  font-size: 1.3rem;
}

.criteria-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--border);
}

.criteria-grid article {
  min-height: 160px;
  padding: 23px;
  background: var(--bg-raised);
}

.criteria-grid span {
  color: var(--color-target);
  font-family: var(--font-mono);
  font-size: 1.45rem;
}

.criteria-grid p {
  display: grid;
  gap: 4px;
  margin: 31px 0 0;
  color: var(--muted);
  font-size: 0.66rem;
}

.criteria-grid strong {
  color: var(--text);
  font-size: 0.76rem;
}

.closing-statement {
  margin: 38px 0 0;
  padding: 48px;
  border: 1px solid rgba(var(--color-target-rgb), 0.3);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(var(--color-target-rgb), 0.075), rgba(var(--color-a-rgb), 0.03));
  text-align: center;
}

.closing-statement > span {
  color: var(--color-target);
}

.closing-statement p {
  max-width: 900px;
  margin: 18px auto 0;
  color: var(--customer);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.45rem, 3vw, 2.55rem);
  line-height: 1.35;
  letter-spacing: -0.028em;
}

.final-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 29px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  margin-top: 100px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.site-footer p {
  margin: 0;
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.52rem;
}

.glossary-dialog {
  width: min(calc(100% - 32px), 540px);
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-lg);
  color: var(--text);
  background: var(--bg-raised);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.55);
}

.glossary-dialog::backdrop {
  background: rgba(2, 7, 11, 0.76);
  backdrop-filter: blur(5px);
}

.dialog-topline {
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px 10px 22px;
  border-bottom: 1px solid var(--border);
}

.dialog-topline span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.56rem;
  text-transform: uppercase;
}

.dialog-topline button {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-soft);
  background: transparent;
  font-size: 1.3rem;
  cursor: pointer;
}

.dialog-content {
  padding: 30px;
}

.dialog-content small {
  color: var(--color-a);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  text-transform: uppercase;
}

.dialog-content h2 {
  margin: 8px 0 16px;
  font-size: 2rem;
}

.dialog-content p {
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.7;
}

@keyframes panel-in {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: none; }
}

@keyframes route-pulse {
  0% { left: -20px; opacity: 0; }
  12% { opacity: 1; }
  88% { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

@media (max-width: 1180px) {
  :root {
    --rail-width: 220px;
  }

  .chapter-navigation a {
    font-size: 0.67rem;
  }

  .context-map {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tension-field {
    grid-column: 1 / -1;
    grid-row: 2;
    width: min(100%, 500px);
    margin: 20px auto;
  }

  .innovation-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .final-flow {
    grid-template-columns: repeat(3, 1fr);
  }

  .final-flow > i {
    width: 1px;
    height: 18px;
    justify-self: center;
  }
}

@media (max-width: 980px) {
  :root {
    --rail-width: 0px;
  }

  html {
    scroll-padding-top: 78px;
  }

  .site-rail {
    top: 66px;
    z-index: 150;
    width: min(88vw, 340px);
    padding-top: 22px;
    transform: translateX(-105%);
    transition: transform 260ms var(--ease);
  }

  .site-rail .rail-brand {
    display: none;
  }

  .chapter-navigation {
    margin-top: 0;
  }

  .chapter-navigation a {
    min-height: 46px;
    font-size: 0.78rem;
  }

  body.nav-open {
    overflow: hidden;
  }

  body.nav-open .site-rail {
    transform: translateX(0);
  }

  .nav-scrim {
    position: fixed;
    inset: 66px 0 0;
    z-index: 140;
    width: 100%;
    border: 0;
    background: rgba(2, 7, 11, 0.68);
    backdrop-filter: blur(4px);
  }

  body.nav-open .nav-scrim {
    display: block;
  }

  .mobile-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 160;
    display: flex;
    min-height: 66px;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    border-bottom: 1px solid var(--border);
    background: rgba(5, 14, 22, 0.91);
    backdrop-filter: blur(18px);
  }

  .mobile-header .brand-lockup small {
    font-size: 0.58rem;
  }

  .menu-toggle {
    display: grid;
    width: 44px;
    height: 44px;
    place-content: center;
    gap: 7px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
  }

  .menu-toggle span {
    width: 19px;
    height: 1px;
    background: var(--text);
    transition: transform 180ms var(--ease);
  }

  .menu-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }

  main {
    margin-left: 0;
  }

  .hero {
    padding-top: 100px;
  }

  .hero-topline {
    top: 82px;
  }

  .fusion-stage {
    grid-template-columns: 1fr 110px 1fr;
  }

  .world-card {
    min-height: 300px;
  }

  .mini-stack {
    align-items: stretch;
    flex-direction: column;
  }

  .mini-stack i {
    width: 1px;
    height: 6px;
    margin-left: 12px;
  }

  .principle-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .target-lanes {
    grid-template-columns: 1fr;
  }

  .service-boundary {
    min-height: 50px;
  }

  .service-boundary i {
    top: 50%;
    right: 40px;
    bottom: auto;
    left: 40px;
    border-top: 1px dashed var(--color-transition);
    border-left: 0;
  }

  .service-boundary span {
    padding: 7px 10px;
    writing-mode: horizontal-tb;
    transform: none;
  }

  .owner-lane {
    min-height: auto;
  }

  .route-targets {
    grid-template-columns: repeat(2, 1fr);
  }

  .route-fan {
    display: none;
  }

  .route-targets {
    margin-top: 22px;
  }

  .identity-model {
    min-height: 690px;
  }

  .spoke-1 { left: 4%; }
  .spoke-2 { right: 4%; }
  .spoke-3 { left: 2%; }
  .spoke-4 { right: 2%; }
  .spoke-5 { left: 7%; }
  .spoke-6 { right: 7%; }

  .portal-stage,
  .portal-stage:nth-child(n) {
    margin-left: 0;
  }

  .portal-stages::before {
    display: none;
  }

  .roadmap {
    grid-template-columns: 1fr;
  }

  .roadmap-phase {
    min-height: auto;
  }

  .phase-goal {
    min-height: auto;
  }

  .roadmap-axis {
    grid-template-columns: auto 1fr auto;
  }

  .roadmap-axis span:nth-of-type(2),
  .roadmap-axis i:nth-of-type(2) {
    display: none;
  }
}

@media (max-width: 760px) {
  :root {
    --page-pad: 20px;
    --section-pad: 86px;
  }

  body {
    font-size: 16px;
  }

  .hero {
    display: block;
    min-height: auto;
    padding-top: 132px;
  }

  .hero-topline {
    top: 88px;
  }

  .hero-topline .edition {
    display: none;
  }

  .hero-copy {
    margin: 40px auto 30px;
  }

  .hero h1 {
    font-size: clamp(3.15rem, 15vw, 5rem);
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .hero-intro {
    font-size: 1rem;
  }

  .fusion-stage {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .fusion-core {
    min-height: 130px;
    order: 2;
  }

  .world-a {
    order: 1;
  }

  .world-b {
    order: 3;
  }

  .fusion-line {
    top: auto;
    right: auto;
    left: 50%;
    width: 1px;
    height: 32px;
    background: linear-gradient(transparent, var(--color-transition));
  }

  .line-left { top: 0; }
  .line-right { right: auto; bottom: 0; transform: rotate(180deg); }

  .fusion-pulse {
    top: 50%;
    transform: translate(-50%, -50%);
  }

  .world-card {
    min-height: auto;
  }

  .mini-stack {
    display: none;
  }

  .hero-outcome {
    grid-template-columns: 1fr;
    margin-top: 18px;
    text-align: center;
  }

  .hero-outcome p,
  .text-link {
    font-size: 0.94rem;
  }

  .chapter-header {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .chapter-index {
    width: 76px;
  }

  .chapter-header h2 {
    font-size: clamp(2.65rem, 13vw, 4.2rem);
  }

  .chapter-lede {
    font-size: 1rem;
  }

  .context-map,
  .architecture-duo,
  .principle-grid,
  .boundary-contract,
  .transition-controls,
  .migration-sequence ol,
  .option-comparison,
  .responsibility-panels,
  .simulator-layout,
  .risk-grid,
  .decision-practice,
  .shutdown-ledger,
  .criteria-grid {
    grid-template-columns: 1fr;
  }

  .tension-field {
    min-height: 360px;
  }

  .context-actor {
    min-height: auto;
  }

  .statement {
    grid-template-columns: 1fr;
    padding: 29px;
  }

  .statement-mark {
    font-size: 3.5rem;
  }

  .statement p {
    font-size: 1.04rem;
  }

  .principle-card.featured {
    grid-column: auto;
  }

  .principle-card {
    min-height: 250px;
  }

  .guardrail-bar {
    grid-template-columns: 1fr;
  }

  .target-architecture,
  .tab-panel,
  .final-architecture {
    padding: 18px;
  }

  .cross-cutting-rail {
    justify-content: flex-start;
  }

  .compact-list {
    grid-template-columns: 1fr;
  }

  .tab-list {
    overflow-x: auto;
  }

  .tab-list button {
    min-width: 125px;
    font-size: 0.94rem;
  }

  .tab-stage {
    min-height: auto;
  }

  .today-diagram {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .silo-gap {
    min-height: 68px;
  }

  .silo-gap::before,
  .silo-gap::after {
    top: 0;
    bottom: 0;
    left: 50%;
  }

  .silo-gap::after {
    display: none;
  }

  .route-targets {
    grid-template-columns: 1fr;
    width: 100%;
  }

  .route-targets .system-node {
    width: 100%;
  }

  .compact-chain {
    align-items: stretch;
    flex-direction: column;
    margin-top: 38px;
  }

  .compact-chain i {
    text-align: center;
  }

  .identity-model {
    display: grid;
    min-height: auto;
    gap: 12px;
    padding: 24px;
  }

  .identity-model::before,
  .identity-model::after,
  .identity-spoke::after {
    display: none;
  }

  .identity-core {
    position: relative;
    top: auto;
    left: auto;
    width: 170px;
    height: 170px;
    margin: 0 auto 15px;
    transform: none;
  }

  .identity-spokes {
    display: grid;
    gap: 8px;
  }

  .identity-spoke,
  .spoke-1,
  .spoke-2,
  .spoke-3,
  .spoke-4,
  .spoke-5,
  .spoke-6 {
    position: relative;
    inset: auto;
    width: 100%;
  }

  .identity-roles {
    grid-template-columns: 1fr;
  }

  .portal-stage {
    grid-template-columns: 58px 1fr;
    padding-right: 14px;
  }

  .stage-state {
    grid-column: 2;
    justify-self: start;
  }

  .layer-row {
    grid-template-columns: 40px 1fr 36px;
  }

  .layer-row p {
    grid-column: 2 / -1;
    font-size: 0.94rem;
  }

  .feature-list {
    grid-template-columns: 1fr;
  }

  .architecture-warning {
    align-items: start;
  }

  .decision-flow ol {
    grid-template-columns: 1fr;
    gap: 0;
    overflow: visible;
  }

  .decision-flow li {
    min-height: 83px;
  }

  .decision-flow li:not(:last-child)::after {
    top: auto;
    right: 50%;
    bottom: -5px;
    transform: translateX(50%) rotate(135deg);
  }

  .decision-flow li p {
    margin-top: 14px;
    font-size: 0.94rem;
  }

  .simulator-heading {
    flex-direction: column;
  }

  .sim-controls {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .segmented-control {
    grid-auto-flow: row;
  }

  .segmented-control button {
    min-height: 48px;
    font-size: 0.94rem;
  }

  .sim-route-visual {
    grid-template-columns: 1fr;
  }

  .sim-route-visual > i {
    width: 1px;
    height: 14px;
    justify-self: center;
  }

  .sim-node {
    font-size: 0.94rem;
  }

  .sim-result-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .sim-facts > div {
    grid-template-columns: 1fr;
  }

  .sim-facts dt,
  .sim-facts dd {
    font-size: 0.94rem;
    text-align: left;
  }

  .roadmap-filter button {
    min-height: 46px;
    font-size: 0.94rem;
  }

  .dependency-chain {
    justify-content: flex-start;
  }

  .dependency-chain span {
    font-size: 0.94rem;
  }

  .innovation-grid,
  .innovation-rules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .innovation-equation {
    grid-template-columns: 1fr;
  }

  .innovation-equation > span {
    text-align: center;
  }

  .risk-card.wide-risk {
    grid-column: auto;
  }

  .risk-card > button,
  .decision-card > button {
    min-height: 86px;
  }

  .decision-card > button {
    grid-template-columns: auto 1fr 25px;
  }

  .decision-card > button .status-chip {
    grid-column: 2;
    justify-self: start;
  }

  .decision-card ul {
    grid-template-columns: 1fr;
  }

  .decision-card li {
    align-items: flex-start;
    flex-direction: column;
    font-size: 0.94rem;
  }

  .final-flow {
    grid-template-columns: 1fr;
  }

  .final-flow > i {
    justify-self: center;
  }

  .closing-statement {
    padding: 32px 22px;
  }

  .final-actions,
  .site-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .site-footer {
    margin-top: 70px;
  }

  .site-footer p {
    font-size: 0.94rem;
  }

  .word-e {
    right: 0;
  }

  .word-w,
  .word-sw {
    left: 0;
  }

  /* The brief requires at least 15px text on mobile. */
  .eyebrow,
  .hero-kicker,
  .outcome-label,
  .note-type,
  .rail-label,
  .world-heading p,
  .system-node small,
  .property-cloud span,
  .tag-row span,
  .role-tag,
  .chapter-notes p,
  .portal-stage small,
  .portal-stage p,
  .stage-state,
  .layer-code,
  .layer-row small,
  .feature-list li,
  .glossary-inline p,
  .glossary-inline button,
  .status-chip,
  .tree-label,
  .customer-tree strong,
  .sim-controls legend,
  .switch-control strong,
  .switch-control small,
  .sim-output > p,
  .roadmap-phase header small,
  .roadmap-phase li,
  .phase-gate p,
  .innovation-grid p,
  .innovation-rules p,
  .risk-card button small,
  .risk-card button strong,
  .decision-card button small,
  .decision-card button strong,
  .anti-pattern-rule span,
  .decision-legend span,
  .shutdown-ledger li,
  .criteria-grid p,
  .matrix-disclaimer,
  .criteria-disclaimer,
  .dialog-topline span,
  .dialog-content small,
  .dialog-content p {
    font-size: 0.9375rem;
  }

  body *:not(h1):not(h2):not(h3):not(h4) {
    font-size: max(0.9375rem, 1em) !important;
  }
}

@media (max-width: 460px) {
  .mobile-header {
    padding-inline: 14px;
  }

  .mobile-header .brand-mark {
    width: 32px;
    height: 32px;
    flex-basis: 32px;
  }

  .mobile-header .brand-lockup strong {
    font-size: 0.88rem;
  }

  .hero h1 {
    font-size: 3.1rem;
  }

  .world-card,
  .architecture-board,
  .principle-card,
  .option-card,
  .responsibility-panels > article,
  .roadmap-phase,
  .shutdown-ledger article {
    padding: 21px;
  }

  .tension-field {
    min-height: 330px;
  }

  .tension-word {
    max-width: 110px;
    font-size: 0.75rem;
  }

  .identity-model {
    padding: 18px;
  }

  .innovation-grid,
  .innovation-rules {
    grid-template-columns: 1fr;
  }

  .sim-controls,
  .sim-output,
  .simulator-heading {
    padding: 22px;
  }

  .chapter-navigation a {
    font-size: 0.94rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}

@media print {
  :root {
    color-scheme: light;
  }

  body {
    color: #17232c;
    background: #fff;
  }

  .site-rail,
  .mobile-header,
  .reading-progress,
  .nav-scrim,
  .final-actions,
  .roadmap-filter {
    display: none !important;
  }

  main {
    margin: 0;
  }

  .hero,
  .chapter {
    min-height: auto;
    page-break-inside: avoid;
    color: #17232c;
    background: #fff;
  }

  .chapter {
    padding: 50px 30px;
  }
}