:root {
  --paper: #f2f0e9;
  --paper-deep: #e7e3d9;
  --ink: #171917;
  --muted: #646761;
  --line: rgba(23, 25, 23, 0.16);
  --acid: #d8ff4f;
  --dark: #20231f;
  --wrap: min(1180px, calc(100vw - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(23, 25, 23, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 25, 23, 0.025) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px;
  font-family:
    Inter,
    ui-sans-serif,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 99;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  background: var(--ink);
  color: white;
  transform: translateY(-150%);
}

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

.wrap {
  width: var(--wrap);
  margin-inline: auto;
}

.site-header {
  height: 92px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.monogram {
  width: max-content;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.06em;
  text-decoration: none;
}

.monogram span {
  color: #769400;
}

.header-note,
.quiet-link {
  font-size: 0.74rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-note {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #769400;
  box-shadow: 0 0 0 0 rgba(118, 148, 0, 0.35);
  animation: pulse 2.4s infinite;
}

.quiet-link {
  justify-self: end;
  text-decoration: none;
}

.quiet-link-left {
  justify-self: flex-start;
}

.quiet-link span {
  display: inline-block;
  margin-left: 5px;
  transition: transform 180ms ease;
}

.quiet-link:hover span {
  transform: translate(3px, -3px);
}

.hero {
  position: relative;
  min-height: 600px;
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) 330px;
  gap: 38px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.hero-index,
.eyebrow {
  font:
    600 0.7rem/1.4 ui-monospace,
    "SFMono-Regular",
    Consolas,
    monospace;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero-index {
  align-self: start;
  margin-top: 64px;
  color: var(--muted);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.eyebrow {
  margin: 0 0 24px;
  color: #5b6e13;
}

.hero h1 {
  max-width: 800px;
  margin: 0;
  font-size: clamp(4rem, 7.2vw, 7.4rem);
  font-weight: 720;
  line-height: 0.9;
  letter-spacing: -0.075em;
}

.hero h1 em {
  color: transparent;
  -webkit-text-stroke: 1.4px var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
}

.lede {
  max-width: 620px;
  margin: 36px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.22rem);
  line-height: 1.65;
}

.orbit {
  position: relative;
  width: 280px;
  aspect-ratio: 1;
  /* justify-self: end; */
}

.orbit-ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.orbit-ring::before,
.orbit-ring::after {
  content: "";
  position: absolute;
  inset: 15%;
  border: 1px dashed var(--line);
  border-radius: 50%;
}

.orbit-ring::after {
  inset: 36%;
  border-style: solid;
}

.orbit-core {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 68px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--acid);
  font-weight: 800;
  transform: translate(-50%, -50%);
}

.orbit-dot {
  position: absolute;
  top: 48%;
  left: 48%;
  width: 13px;
  aspect-ratio: 1;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--acid);
  animation: orbit 9s linear infinite;
  transform-origin: 8px 8px;
}

.orbit-label {
  position: absolute;
  right: -40px;
  bottom: 32px;
  padding: 7px 10px;
  background: var(--acid);
  font:
    700 0.58rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.08em;
  transform: rotate(-7deg);
}

.archive {
  padding-block: 104px 120px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 42px;
}

.section-heading .eyebrow {
  margin-bottom: 10px;
}

.section-heading h2,
.archive-note h2 {
  margin: 0;
  font-size: clamp(2.3rem, 4vw, 4.4rem);
  line-height: 1;
  letter-spacing: -0.06em;
}

.archive-count {
  margin: 0;
  color: var(--muted);
  font:
    600 0.7rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.archive-count span {
  color: var(--ink);
}

.version-list {
  display: grid;
  gap: 28px;
}

.archive-error {
  padding: 30px;
  border: 1px solid var(--line);
  background: var(--paper-deep);
}

.archive-error p {
  margin: 0 0 12px;
  color: var(--muted);
}

.archive-error a {
  font-size: 0.78rem;
  font-weight: 750;
  text-decoration: none;
}

.version-card {
  --mouse-x: 50%;
  --mouse-y: 50%;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 4px;
  padding: 30px;
  color: #f3f1e9;
  background:
    radial-gradient(
      500px circle at var(--mouse-x) var(--mouse-y),
      rgba(216, 255, 79, 0.08),
      transparent 45%
    ),
    var(--dark);
  box-shadow: 0 22px 50px rgba(24, 26, 23, 0.12);
  overflow: hidden;
  animation: rise 650ms calc(var(--order) * 90ms) both
    cubic-bezier(0.2, 0.75, 0.25, 1);
}

.version-card::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border: 1px solid transparent;
  transition: border-color 180ms ease;
}

.version-card:hover::after {
  border-color: rgba(216, 255, 79, 0.34);
}

.card-main-link {
  position: absolute;
  z-index: 1;
  inset: 0;
}

.card-topline {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: #999d96;
  font:
    600 0.68rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  pointer-events: none;
}

.card-version {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--acid);
}

.current-pill {
  padding: 5px 8px;
  border: 1px solid rgba(216, 255, 79, 0.3);
  border-radius: 99px;
  color: var(--acid);
  font-size: 0.55rem;
}

.card-body {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(40px, 7vw, 110px);
  padding: 58px 0 64px;
}

.card-chapter {
  margin: 0 0 20px;
  color: var(--acid);
  font:
    600 0.7rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.card-copy h3 {
  margin: 0;
  font-size: clamp(2.55rem, 5vw, 5.6rem);
  font-weight: 670;
  line-height: 0.97;
  letter-spacing: -0.065em;
}

.card-summary {
  max-width: 570px;
  margin: 28px 0;
  color: #afb3ab;
  font-size: 1rem;
  line-height: 1.65;
}

.tag-list {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  pointer-events: none;
}

.tag-list li {
  padding: 8px 11px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 99px;
  color: #c9ccc4;
  font-size: 0.7rem;
}

.system-map {
  position: relative;
  min-height: 300px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: #1b1e1a;
  overflow: hidden;
}

.map-grid {
  position: absolute;
  inset: 0;
  opacity: 0.3;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
}

.system-map svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: calc(100% - 40px);
}

.system-map path {
  fill: none;
  stroke: rgba(216, 255, 79, 0.5);
  stroke-width: 1;
  stroke-dasharray: 5 5;
}

.map-node {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 56px;
  height: 30px;
  border: 1px solid rgba(216, 255, 79, 0.55);
  background: #242820;
  color: var(--acid);
  font:
    650 0.55rem/1 ui-monospace,
    monospace;
}

.node-a {
  left: 10%;
  top: 16%;
}
.node-b {
  left: calc(50% - 28px);
  top: 38%;
}
.node-c {
  right: 8%;
  top: 16%;
}
.node-d {
  right: 8%;
  bottom: 17%;
}

.map-packet {
  position: absolute;
  z-index: 3;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 14px var(--acid);
}

.packet-one {
  top: 21%;
  left: 22%;
  animation: packet-one 4s infinite ease-in-out;
}

.packet-two {
  left: 51%;
  top: 42%;
  animation: packet-two 4s 1.6s infinite ease-in-out;
}

.system-map > p {
  position: absolute;
  bottom: 14px;
  left: 18px;
  margin: 0;
  color: #73776f;
  font:
    600 0.56rem/1 ui-monospace,
    monospace;
  letter-spacing: 0.12em;
}

.card-footer {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: end;
  justify-content: space-between;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

.card-stats {
  display: flex;
  gap: clamp(24px, 5vw, 68px);
}

.card-stat {
  display: grid;
  gap: 6px;
}

.card-stat strong {
  color: var(--acid);
  font-size: 1.15rem;
}

.card-stat span {
  color: #858981;
  font-size: 0.66rem;
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.75rem;
  font-weight: 700;
}

.resume-link {
  position: relative;
  z-index: 3;
  color: #aeb2a9;
  text-decoration: none;
  pointer-events: auto;
}

.resume-link:hover {
  color: white;
}

.open-chapter {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.round-arrow {
  width: 40px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--acid);
  color: var(--ink);
  font-size: 1rem;
  transition: transform 180ms ease;
}

.version-card:hover .round-arrow {
  transform: rotate(45deg);
}

.archive-note {
  min-height: 470px;
  display: grid;
  grid-template-columns: 0.45fr 1.1fr 0.65fr;
  gap: 50px;
  align-items: center;
  border-top: 1px solid var(--line);
}

.archive-note .eyebrow {
  margin: 0;
}

.archive-note > p:last-child {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.site-footer {
  min-height: 110px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font:
    600 0.67rem/1.4 ui-monospace,
    monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@keyframes pulse {
  70% {
    box-shadow: 0 0 0 9px rgba(118, 148, 0, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(118, 148, 0, 0);
  }
}

@keyframes orbit {
  from {
    transform: rotate(0deg) translateX(140px) rotate(0deg);
  }
  to {
    transform: rotate(360deg) translateX(140px) rotate(-360deg);
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes packet-one {
  0%,
  10% {
    transform: translate(0, 0);
    opacity: 0;
  }
  18% {
    opacity: 1;
  }
  50% {
    transform: translate(115px, 67px);
    opacity: 1;
  }
  60%,
  100% {
    transform: translate(115px, 67px);
    opacity: 0;
  }
}

@keyframes packet-two {
  0%,
  10% {
    transform: translate(0, 0);
    opacity: 0;
  }
  18% {
    opacity: 1;
  }
  55% {
    transform: translate(118px, 81px);
    opacity: 1;
  }
  65%,
  100% {
    transform: translate(118px, 81px);
    opacity: 0;
  }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 52px 1fr;
  }

  .orbit {
    position: absolute;
    right: -150px;
    opacity: 0.3;
  }

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

  .system-map {
    min-height: 280px;
  }

  .archive-note {
    grid-template-columns: 1fr 1.6fr;
  }

  .archive-note > p:last-child {
    grid-column: 2;
  }
}

@media (max-width: 640px) {
  :root {
    --wrap: calc(100vw - 28px);
  }

  .site-header {
    height: 74px;
    grid-template-columns: 1fr 1fr;
  }

  .header-note {
    display: none;
  }

  .hero {
    min-height: 610px;
    grid-template-columns: 1fr;
    align-content: center;
  }

  .hero-index {
    display: none;
  }

  .hero h1 {
    font-size: clamp(3.5rem, 18vw, 5.1rem);
  }

  .lede {
    max-width: 94%;
  }

  .orbit {
    right: -190px;
  }

  .archive {
    padding-block: 74px;
  }

  .section-heading {
    align-items: start;
    gap: 20px;
  }

  .archive-count {
    white-space: nowrap;
  }

  .version-card {
    padding: 20px;
  }

  .card-body {
    gap: 42px;
    padding-block: 42px;
  }

  .card-copy h3 {
    font-size: 2.8rem;
  }

  .card-footer {
    align-items: start;
    gap: 28px;
    flex-direction: column;
  }

  .card-stats {
    width: 100%;
    justify-content: space-between;
    gap: 12px;
  }

  .card-actions {
    width: 100%;
    justify-content: space-between;
  }

  .archive-note {
    padding-block: 80px;
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .archive-note > p:last-child {
    grid-column: auto;
  }

  .site-footer {
    align-items: start;
    padding-block: 28px;
    gap: 12px;
    flex-direction: column;
  }
}

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

/* Chapter-specific archive diagrams: semantic inline SVG, no image assets required. */
.system-map:has(.chapter-flow) {
  min-height: 280px;
  display: grid;
  place-items: center;
  background: #171b19;
}
.chapter-flow {
  width: 100%;
  height: 100%;
  min-height: 280px;
  color: #dfff59;
  overflow: visible;
}
.chapter-flow text {
  fill: currentColor;
  font:
    700 8px/1 ui-monospace,
    SFMono-Regular,
    Consolas,
    monospace;
  text-anchor: middle;
  letter-spacing: 0.08em;
}
.chapter-flow .node-sub {
  fill: #858d83;
  font-size: 5px;
  letter-spacing: 0.1em;
}
.chapter-flow .flow-node rect {
  fill: #202722;
  stroke: rgba(223, 255, 89, 0.62);
  stroke-width: 1;
}
.chapter-flow .flow-node-warn rect {
  stroke: #e8a467;
}
.chapter-flow .flow-node-done rect {
  stroke: #7ad8c5;
}
.chapter-flow .flow-route,
.chapter-flow .flow-retry-route,
.chapter-flow .flow-context-route,
.chapter-flow .flow-feedback-route {
  fill: none;
  stroke: #dfff59;
  stroke-opacity: 0.58;
  stroke-width: 1;
  stroke-dasharray: 3 4;
}
.chapter-flow .flow-retry-route {
  stroke: #e8a467;
  stroke-opacity: 0.8;
}
.chapter-flow .flow-caption {
  fill: #a1aaa0;
  font-size: 6px;
  letter-spacing: 0.16em;
}
.chapter-flow .flow-packet {
  fill: #f5ffd0;
  filter: drop-shadow(0 0 4px #dfff59);
}
.flow-orchestration {
  color: #7ad8c5;
}
.flow-orchestration .flow-node rect {
  fill: #1d2928;
  stroke: rgba(122, 216, 197, 0.66);
}
.flow-orchestration .flow-node-core rect {
  fill: #203432;
  stroke: #7ad8c5;
  stroke-width: 1.4;
}
.flow-orchestration .flow-node-context rect {
  fill: #282438;
  stroke: rgba(194, 163, 255, 0.7);
}
.flow-orchestration .flow-context-route {
  fill: none;
  stroke: #c2a3ff;
  stroke-opacity: 0.78;
  stroke-width: 1;
  stroke-dasharray: 2 4;
}
.flow-orchestration .flow-feedback-route {
  fill: none;
  stroke: #7ad8c5;
  stroke-opacity: 0.48;
  stroke-width: 1;
  stroke-dasharray: 2 4;
}
.flow-orchestration .packet-intent {
  fill: #d7fff7;
  filter: drop-shadow(0 0 4px #7ad8c5);
}
.flow-orchestration .packet-context {
  fill: #e2d5ff;
  filter: drop-shadow(0 0 4px #c2a3ff);
}
@media (prefers-reduced-motion: reduce) {
  .chapter-flow .flow-packet {
    display: none;
  }
}
.flow-consent-rag {
  color: #7ad8c5;
}
.flow-consent-rag .flow-node rect {
  fill: #1d2928;
  stroke: rgba(122, 216, 197, 0.66);
}
.flow-consent-rag .flow-node-core rect {
  fill: #203432;
  stroke: #7ad8c5;
  stroke-width: 1.4;
}
.flow-consent-rag .flow-node-context rect {
  fill: #282438;
  stroke: rgba(194, 163, 255, 0.7);
}
.flow-consent-rag .flow-context-route {
  fill: none;
  stroke: #c2a3ff;
  stroke-opacity: 0.78;
  stroke-width: 1;
  stroke-dasharray: 2 4;
}
.flow-consent-rag .flow-feedback-route {
  fill: none;
  stroke: #7ad8c5;
  stroke-opacity: 0.48;
  stroke-width: 1;
  stroke-dasharray: 2 4;
}