:root {
  color-scheme: dark;
  --shell: #16161b;
  --panel: #1b1b21;
  --ink: #ece8e1;
  --ink-soft: #a9a29a;
  --ink-dim: #949089;
  --line: rgba(255, 255, 255, .11);
  --net: #35e0e8;
  --storage: #a78bfa;
  --control: #edb200;
  --orch: #00c758;
  --work: #fe6e00;
  --sans: ui-sans-serif, system-ui, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--shell); color: var(--ink); font-family: var(--sans); font-size: 18px; line-height: 1.5; }
a { color: var(--ink-soft); text-underline-offset: 4px; }
a:hover { color: var(--ink); }
button, a, [tabindex] { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--net); outline-offset: 5px; }
button { font: inherit; cursor: pointer; }
code { font-family: var(--mono); font-size: .9em; }
.skip-link { position: fixed; top: -80px; left: 20px; z-index: 10; padding: 14px; background: var(--panel); }
.skip-link:focus { top: 12px; }
.masthead { min-height: 64px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px 24px; border-bottom: 1px solid var(--line); padding: 8px 40px; }
.masthead-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.masthead-nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 12px; font-size: 16px; text-decoration: none; }
.masthead-nav .portfolio-return { color: var(--ink); border: 1px solid var(--line); }
.section-nav { display: flex; flex-wrap: wrap; gap: 8px 24px; max-width: 1600px; margin: 0 auto; padding: 12px 40px; border-bottom: 1px solid var(--line); }
.section-nav a { display: inline-flex; align-items: center; min-height: 44px; font-size: 16px; }
.brand { display: flex; align-items: center; gap: 14px; color: var(--ink); font-weight: 650; letter-spacing: .045em; text-decoration: none; }
.signal { display: flex; align-items: flex-end; height: 21px; gap: 3px; }
.signal i { display: block; width: 3px; height: 9px; background: var(--net); }
.signal i:nth-child(2) { height: 15px; background: var(--storage); }
.signal i:nth-child(3) { height: 21px; background: var(--control); }
.signal i:nth-child(4) { height: 17px; background: var(--orch); }
.signal i:nth-child(5) { height: 11px; background: var(--work); }
.eyebrow { font: 13px var(--mono); letter-spacing: .13em; text-transform: uppercase; color: var(--ink-dim); line-height: 1.5; }
main { max-width: 1600px; margin: 0 auto; padding: 0 40px; }
.intro { display: grid; grid-template-columns: 1.2fr 1fr; align-items: end; gap: 70px; padding: 36px 0 28px; }
.intro .eyebrow { margin: 0 0 10px; }
h1 { margin: 0; font-size: clamp(28px, 3vw, 44px); line-height: 1.12; font-weight: 520; letter-spacing: -.035em; }
.intro-note { max-width: 470px; justify-self: end; }
.intro-note > p:first-child { margin: 0 0 8px; line-height: 1.5; font-size: 18px; }
.caption { margin: 0; color: var(--ink-soft); font-size: 18px; line-height: 1.5; }
h2 { margin: 0; font-size: 22px; font-weight: 550; }
h3 { margin: 0 0 12px; font-size: 20px; font-weight: 520; line-height: 1.3; }
.architecture { border: 1px solid var(--line); background: var(--panel); }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 17px 22px; border-bottom: 1px solid var(--line); }
.section-heading .eyebrow { font-size: 13px; max-width: 520px; }
.diagram-toolbar { padding: 18px 22px; border-bottom: 1px solid var(--line); }
.diagram-toolbar p { margin: 0 0 14px; font-size: 18px; line-height: 1.5; }
.zoom-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }
.zoom-controls button { min-height: 44px; padding: 8px 14px; font-size: 16px; color: var(--ink); border: 1px solid var(--line); background: transparent; }
.zoom-controls a { font-size: 16px; }
button:disabled { cursor: default; opacity: .6; }
.diagram-toolbar .view-status { margin: 14px 0 0; font-size: 16px; color: var(--ink-soft); }
.diagram-scroll { overflow: auto; scroll-behavior: auto; }
.system-diagram { width: calc(1728px * var(--diagram-zoom, 1)); min-width: 1728px; display: block; }
.node > rect { fill: #1d1d24; stroke: rgba(255, 255, 255, .21); stroke-width: 1; }
.node text { fill: var(--ink-soft); font-family: var(--sans); font-size: 14px; }
.node .node-kicker { font-family: var(--mono); font-size: 11.5px; letter-spacing: .04em; fill: var(--ink-dim); }
.node .node-title { font-size: 19px; fill: var(--ink); font-weight: 550; }
.node .node-foot { font-size: 13.5px; fill: var(--ink-soft); }
.node rect.inner { fill: #16161b; stroke: var(--line); }
.lane-labels text, .diagram-foot { fill: var(--ink-dim); font: 11.5px var(--mono); letter-spacing: .05em; }
.diagram-foot { font-size: 13.5px; letter-spacing: 0; }
.edge-labels text { fill: var(--ink-soft); font: 13.5px var(--mono); }
.connection { stroke-width: 1.6; opacity: .85; }
.connection.network { stroke: var(--net); }
.connection.storage { stroke: var(--storage); }
.connection.control { stroke: var(--control); }
.connection.orchestration { stroke: var(--orch); }
.connection.work { stroke: var(--work); }
.private-boundary > rect { stroke-width: 2; }
.node, .connection { transition: opacity .25s ease; }
.system-diagram.has-selection .node:not(.selected) { opacity: .9; }
.system-diagram.has-selection .connection:not(.selected) { opacity: .18; }
.system-diagram.has-selection .node.selected > rect:first-child { stroke: var(--ink-soft); stroke-width: 1.5; }
.connection.selected { stroke-width: 2.4; stroke-dasharray: 7 5; animation: travel 2.6s linear infinite; }
@keyframes travel { to { stroke-dashoffset: -36; } }
.legend { display: flex; flex-wrap: wrap; gap: 12px 28px; border-top: 1px solid var(--line); padding: 14px 22px; }
.legend span { display: flex; align-items: center; gap: 8px; font: 16px var(--mono); line-height: 1.5; color: var(--ink-soft); }
.legend i { width: 18px; height: 2px; background: currentColor; }
.legend .network { color: var(--net); }
.legend .storage { color: var(--storage); }
.legend .control { color: var(--control); }
.legend .orchestration { color: var(--orch); }
.legend .work { color: var(--work); }
.movements { padding: 12px 0 24px; }
.movement-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 16px; }
.navigation { display: flex; gap: 8px; }
.navigation button { height: 44px; width: 48px; font-size: 20px; color: var(--ink); background: transparent; border: 1px solid var(--line); }
.stepper { display: grid; grid-template-columns: repeat(6, 1fr); border: 1px solid var(--line); }
.stepper button { border: 0; border-right: 1px solid var(--line); background: transparent; color: var(--ink-soft); padding: 14px; text-align: left; font-size: 16px; }
.stepper button:last-child { border-right: 0; }
.stepper button span { font: 13px var(--mono); color: var(--ink-dim); margin-right: 10px; }
.stepper button[aria-current] { background: #28282f; color: var(--ink); box-shadow: inset 0 -2px var(--ink); }
.movement-copy { display: grid; grid-template-columns: 185px minmax(0, 1fr); gap: 12px 24px; border: 1px solid var(--line); border-top: 0; padding: 20px 22px; }
.movement-copy .eyebrow { margin: 0; }
.movement-copy h3 { margin: 0; font-size: 22px; }
.movement-copy > p:not(.eyebrow) { font-size: 18px; line-height: 1.5; margin: 0; grid-column: 2; }
.image-links { display: flex; flex-wrap: wrap; gap: 12px 24px; padding: 22px 0; font-size: 16px; color: var(--ink-soft); }
.image-links > span:last-child { flex-basis: 100%; font-size: 18px; }
.architecture:fullscreen { display: flex; flex-direction: column; background: var(--panel); width: 100%; height: 100%; }
.architecture:fullscreen .diagram-scroll { flex: 1; min-height: 0; }
.architecture:fullscreen .section-heading, .architecture:fullscreen .diagram-toolbar, .architecture:fullscreen .legend { flex-shrink: 0; }
.boundaries, .text-model { padding: 30px 0; border-top: 1px solid var(--line); }
.boundary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 20px; }
.delivered { border: 1px solid var(--line); padding: 22px; }
.delivered p:not(.eyebrow), .portability p:not(.eyebrow), .contract-grid p { font-size: 18px; color: var(--ink-soft); line-height: 1.5; }
.delivered h3, .portability h3 { font-size: 22px; }
.portability { margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--line); }
.contract-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 24px; }
.contract-grid article { padding: 22px; border: 1px solid var(--line); margin: 0 -1px -1px 0; }
.contract-grid h3 { font-size: 22px; }
.contract-grid a { display: block; font: 16px var(--mono); line-height: 1.5; overflow-wrap: anywhere; margin-top: 9px; }
footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); padding: 28px 0 38px; font: 16px var(--mono); line-height: 1.5; color: var(--ink-soft); }
@media (max-width: 1100px) {
  main { padding: 0 24px; }
  .masthead { padding: 0 24px; }
  .section-nav { padding-inline: 24px; }
  .intro { gap: 35px; }
  .movement-copy { grid-template-columns: 140px 1fr; }
  #movement-description, .movement-copy .caption { grid-column: 2; }
  .contract-grid { grid-template-columns: 1fr 1fr; }
  .section-heading { align-items: start; flex-direction: column; gap: 4px; }
}
@media (max-width: 680px) {
  main { padding: 0 16px; }
  .masthead { padding: 0 16px; gap: 12px; }
  .section-nav { padding-inline: 16px; }
  .masthead > .eyebrow { display: none; }
  .intro { grid-template-columns: 1fr; gap: 20px; }
  .intro-note { justify-self: start; }
  .stepper { grid-template-columns: repeat(3, 1fr); }
  .stepper button { border-bottom: 1px solid var(--line); }
  .movement-copy { display: block; }
  .movement-copy h3 { margin: 8px 0 12px; }
  .movement-copy .caption { margin-top: 12px; }
  .boundary-grid, .contract-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}