:root {
  --black: #050505;
  --ink: #0b0b0b;
  --paper: #f2f2ef;
  --white: #ffffff;
  --soft: #c8c8c2;
  --muted: #898984;
  --dim: #343434;
  --line: rgba(242, 242, 239, 0.22);
  --line-strong: rgba(242, 242, 239, 0.72);
  --space: clamp(22px, 4vw, 64px);
  --display: "Cinzel", Georgia, serif;
  --body: Arial, Helvetica, sans-serif;
  --text-small: 11px;
  --text-base: 13px;
  --text-large: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--paper);
  background: var(--black);
  font-family: var(--body);
  font-size: var(--text-base);
  line-height: 1.62;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 4;
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 46px 46px, 46px 46px;
  mix-blend-mode: screen;
}

.field {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.42;
  pointer-events: none;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px var(--space);
  border-bottom: 1px solid var(--line);
  background: rgba(5, 5, 5, 0.74);
  backdrop-filter: blur(12px);
}

.brand {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

nav {
  display: flex;
  gap: clamp(14px, 3vw, 38px);
  font-family: var(--body);
  font-size: var(--text-small);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--soft);
}

nav a {
  padding-bottom: 4px;
  border-bottom: 1px solid transparent;
}

nav a:hover {
  border-color: var(--paper);
}

.section {
  position: relative;
  min-height: 100vh;
  padding: 118px var(--space) 78px;
  border-bottom: 1px solid var(--line);
}

.hero {
  display: grid;
  grid-template-columns: minmax(270px, 0.68fr) minmax(420px, 1.32fr);
  gap: clamp(28px, 4vw, 72px);
  align-items: center;
}

.kicker {
  margin: 0 0 20px;
  color: var(--muted);
  font-family: var(--body);
  font-size: var(--text-small);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  font-weight: 400;
  text-transform: uppercase;
}

h1 {
  display: inline-block;
  font-family: var(--display);
  font-size: clamp(34px, 4.7vw, 64px);
  line-height: 1.14;
  letter-spacing: 0.08em;
  transform: scaleX(1.02);
  transform-origin: left center;
  color: var(--paper);
  text-shadow: none;
}

h1 span {
  font-family: var(--body);
  font-size: var(--text-large);
  letter-spacing: 0.16em;
  color: var(--paper);
  text-shadow: none;
}

h2 {
  max-width: 920px;
  font-family: var(--display);
  font-size: clamp(24px, 2.45vw, 36px);
  line-height: 1.25;
  letter-spacing: 0.06em;
  transform: none;
  transform-origin: left center;
}

.thesis {
  max-width: 620px;
  margin: 28px 0 0;
  color: var(--soft);
  font-size: var(--text-large);
  line-height: 1.8;
}

.hero-machine {
  align-self: stretch;
  display: grid;
  place-items: center;
  min-height: 650px;
}

.sigil {
  width: min(100%, 980px);
  overflow: visible;
}

.mobile-tree {
  display: none;
}

.sigil text {
  fill: var(--paper);
  font-family: var(--body);
  font-size: var(--text-base);
  letter-spacing: 0.08em;
}

.rule,
.arch,
.ast path,
.transform-stack rect,
.pulse {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1;
}

.faint {
  stroke: var(--line);
}

.arch.inner {
  stroke: var(--line);
}

.ast circle {
  fill: var(--black);
  stroke: var(--paper);
  stroke-width: 1;
}

.ast-a,
.ast-b {
  animation: breathe 5.8s ease-in-out infinite;
}

.ast-b {
  animation-delay: 1.2s;
}

.transform-stack rect {
  fill: rgba(255, 255, 255, 0.025);
}

.transform-stack rect:nth-of-type(2) {
  animation: invert 4.8s ease-in-out infinite;
}

.pulse {
  stroke: var(--white);
  stroke-dasharray: 48 260;
  stroke-dashoffset: 0;
  filter: url(#soften);
  animation: moveDash 3.6s linear infinite;
}

.p2 {
  animation-delay: 1.1s;
}

.machine-caption {
  fill: var(--muted);
  font-size: var(--text-small);
}

.state-graph .state rect,
.state-graph .branch rect,
.state-graph .leaf rect,
.state-graph .policy rect,
.state-graph .next-state rect {
  fill: rgba(255, 255, 255, 0.018);
  stroke: var(--line-strong);
  stroke-width: 1;
}

.state-graph .branch path,
.state-graph .edge-field path,
.state-graph .continuation path,
.state-graph .choice-line,
.state-graph .chosen-line,
.state-graph .ast-mini path {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
}

.state-graph .branch text,
.state-graph .leaf text,
.state-graph .policy text,
.state-graph .state text,
.state-graph .next-state text {
  font-size: var(--text-small);
}

.state-graph .expr {
  fill: var(--paper);
  font-size: var(--text-base);
  letter-spacing: 0.03em;
}

.search-tree .depth-label {
  font-size: var(--text-small);
  letter-spacing: 0.14em;
}

.search-tree .breadth-note {
  font-size: var(--text-small);
  letter-spacing: 0.08em;
}

.search-tree .leaf text {
  font-size: var(--text-small);
  letter-spacing: 0.035em;
}

.search-tree .leaf .expr {
  font-size: var(--text-small);
  letter-spacing: 0;
}

.search-tree .leaf .rank {
  fill: var(--muted);
  font-size: var(--text-small);
  letter-spacing: 0.12em;
}

.search-tree .branch .rank {
  fill: var(--muted);
  font-size: var(--text-small);
  letter-spacing: 0.08em;
}

.search-tree .chosen-node rect,
.search-tree .chosen-line {
  stroke: var(--paper);
}

.search-tree .chosen-node rect {
  fill: rgba(255, 255, 255, 0.085);
}

.search-tree .search-node:not(.chosen-node) rect,
.search-tree .leaf:not(.chosen-node) rect {
  stroke: rgba(242, 242, 239, 0.42);
}

.search-tree .selected-edge {
  fill: none;
  stroke: var(--paper);
  stroke-width: 1;
}

.search-tree .decision-tag rect {
  fill: var(--black);
  stroke: var(--paper);
  stroke-width: 1;
}

.search-tree .decision-tag text {
  fill: var(--paper);
  font-size: var(--text-small);
  letter-spacing: 0.12em;
}

.search-tree .flow-particle {
  --flow-opacity: 0.7;
  fill: var(--muted);
  opacity: 0;
  filter: url(#particle-glow);
  animation: revealParticle 0.01s var(--flow-delay, 0s) forwards;
}

.search-tree .flow-particle.selected {
  --flow-opacity: 1;
  fill: var(--white);
}

.search-tree .secondary-flow {
  opacity: 0.55;
}

.search-tree .continuation path {
  stroke-dasharray: 2 7;
}

.search-tree .search-modes text {
  font-size: var(--text-small);
}

.search-tree .search-modes .mode-detail {
  fill: var(--muted);
  font-size: var(--text-small);
  letter-spacing: 0.03em;
}

.search-tree .mode-line {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1;
}

.search-tree .beam-line {
  stroke-dasharray: 16 5 4 5 4 5 4 5 4 5;
}

.search-tree .footer-caption {
  font-size: var(--text-small);
}

.state-graph .branch-left rect,
.state-graph .chosen-line {
  stroke: var(--paper);
}

.state-graph .chosen-line {
  stroke-dasharray: 38 220;
  stroke-dashoffset: 0;
  animation: moveDash 3.8s linear infinite;
}

.state-graph .choice-line {
  stroke-dasharray: 2 8;
}

.ast-mini circle {
  fill: var(--black);
  stroke: var(--line-strong);
  stroke-width: 1;
}

.scroll-mark {
  position: absolute;
  left: var(--space);
  bottom: 32px;
  color: var(--muted);
  font-size: var(--text-small);
  letter-spacing: 0.18em;
  writing-mode: vertical-rl;
}

.split {
  display: grid;
  grid-template-columns: minmax(280px, 0.92fr) minmax(320px, 1.08fr);
  gap: clamp(28px, 6vw, 110px);
  align-items: center;
}

.process {
  border-top: 1px solid var(--line-strong);
}

.process-row {
  display: grid;
  grid-template-columns: minmax(130px, 0.42fr) minmax(190px, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.process-row span {
  color: var(--muted);
  font-family: var(--body);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: var(--text-small);
}

code {
  color: var(--paper);
  font-family: var(--body);
  font-size: var(--text-large);
}

.section-heading {
  margin-bottom: clamp(36px, 7vw, 86px);
}

.section-note {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--soft);
  font-size: var(--text-base);
  line-height: 1.82;
}

.compact {
  margin-bottom: clamp(28px, 4vw, 52px);
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.metric-strip > div {
  min-height: 178px;
  padding: 26px;
  border-right: 1px solid var(--line);
}

.metric-strip > div:last-child {
  border-right: 0;
}

.metric {
  display: block;
  font-family: var(--body);
  font-size: var(--text-large);
  line-height: 0.95;
  font-weight: 500;
}

.label {
  display: block;
  max-width: 260px;
  margin-top: 18px;
  color: var(--muted);
  font-family: var(--body);
  font-size: var(--text-base);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bar-stage {
  margin-top: 72px;
  border-top: 1px solid var(--line);
}

.bar-row {
  display: grid;
  grid-template-columns: minmax(170px, 0.35fr) minmax(180px, 1fr) 78px;
  align-items: center;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.bar-name {
  color: var(--soft);
  font-family: var(--body);
  font-size: var(--text-large);
  overflow-wrap: anywhere;
}

.bar-track {
  height: 1px;
  background: var(--dim);
}

.bar-fill {
  height: 1px;
  width: 0%;
  background: var(--paper);
  transition: width 900ms cubic-bezier(.2,.7,.1,1);
}

.bar-value {
  text-align: right;
  color: var(--paper);
  font-family: var(--body);
}

.map-wrap {
  border-top: 1px solid var(--line-strong);
  padding-top: 34px;
  overflow-x: auto;
}

.sweep-map {
  width: 100%;
  min-height: 340px;
  overflow: visible;
}

.sweep-map line,
.sweep-map path {
  stroke: var(--line);
  stroke-width: 1;
}

.sweep-map circle {
  fill: var(--black);
  stroke: var(--paper);
  stroke-width: 1;
}

.sweep-map circle.best {
  fill: var(--paper);
  stroke: var(--paper);
}

.sweep-map text {
  fill: var(--muted);
  font-family: var(--body);
  font-size: var(--text-base);
  letter-spacing: 0.03em;
}

.table-wrap {
  border-top: 1px solid var(--line-strong);
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 820px;
  border-collapse: collapse;
}

th,
td {
  padding: 18px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: var(--text-large);
}

th {
  color: var(--muted);
  font-family: var(--body);
  font-size: var(--text-small);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
}

td:nth-child(3),
td:nth-child(4),
td:nth-child(5),
td:nth-child(6) {
  font-family: var(--body);
}

tr:hover td {
  background: rgba(255, 255, 255, 0.035);
}

.closing {
  min-height: 76vh;
  display: grid;
  align-content: center;
}

.closing-line {
  max-width: 1160px;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(24px, 2.9vw, 42px);
  line-height: 1.22;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.examples {
  min-height: auto;
}

.example-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
}

.example {
  padding: 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.example:last-child {
  border-right: 0;
}

.example-id {
  margin: 0 0 28px;
  color: var(--muted);
  font-family: var(--body);
  font-size: var(--text-small);
  letter-spacing: 0.14em;
}

h3 {
  margin: 0 0 18px;
  color: var(--paper);
  font-family: var(--display);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.example p:not(.example-id) {
  margin: 0;
  color: var(--soft);
  font-size: var(--text-base);
  line-height: 1.78;
}

.terms {
  min-height: auto;
}

.term-list,
.advantage-list {
  border-top: 1px solid var(--line-strong);
}

.term-row,
.advantage-row {
  display: grid;
  grid-template-columns: minmax(150px, 0.28fr) minmax(280px, 1fr);
  gap: clamp(18px, 4vw, 70px);
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.term-row span,
.advantage-row span {
  color: var(--paper);
  font-family: var(--body);
  font-size: var(--text-large);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.term-row p,
.advantage-row p {
  max-width: 900px;
  margin: 0;
  color: var(--soft);
  font-size: var(--text-base);
  line-height: 1.82;
}

.advantages {
  min-height: auto;
}

.trace {
  display: grid;
  gap: 10px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.trace code {
  font-size: var(--text-small);
  line-height: 1.45;
  overflow-wrap: anywhere;
}

@keyframes moveDash {
  to {
    stroke-dashoffset: -308;
  }
}

@keyframes breathe {
  0%, 100% {
    opacity: 0.58;
  }
  50% {
    opacity: 1;
  }
}

@keyframes invert {
  0%, 45%, 100% {
    fill: rgba(255, 255, 255, 0.025);
  }
  55%, 68% {
    fill: rgba(255, 255, 255, 0.16);
  }
}

@keyframes revealParticle {
  to {
    opacity: var(--flow-opacity);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  .flow-particles {
    display: none;
  }
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    gap: 14px;
  }

  nav {
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px 18px;
  }

  .hero,
  .split {
    grid-template-columns: 1fr;
  }

  .hero-machine {
    min-height: auto;
  }

  .section {
    padding-top: 112px;
  }

  .metric-strip {
    grid-template-columns: 1fr;
  }

  .metric-strip > div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .metric-strip > div:last-child {
    border-bottom: 0;
  }

  .bar-row,
  .process-row,
  .term-row,
  .advantage-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .example {
    border-right: 0;
  }
}

@media (max-width: 520px) {
  :root {
    --space: 18px;
  }

  .site-header {
    position: absolute;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  nav {
    display: none;
  }

  h1 {
    font-size: 31px;
    letter-spacing: 0.05em;
    transform: scaleX(1);
    overflow-wrap: anywhere;
  }

  h2,
  .closing-line {
    font-size: 22px;
    letter-spacing: 0.04em;
    transform: scaleX(1);
  }

  .section {
    min-height: auto;
    padding-top: 92px;
    padding-bottom: 58px;
  }

  .hero {
    gap: 32px;
  }

  .thesis,
  .section-note,
  .term-row p,
  .advantage-row p,
  .example p:not(.example-id) {
    line-height: 1.68;
  }

  .sigil {
    display: none;
  }

  .mobile-tree {
    display: grid;
    width: 100%;
    gap: 14px;
    border-top: 1px solid var(--line-strong);
    border-bottom: 1px solid var(--line-strong);
    padding: 18px 0;
  }

  .mobile-node,
  .mobile-branches > div {
    border-bottom: 1px solid var(--line);
    padding: 12px 0;
  }

  .mobile-node:first-child {
    border-top: 0;
  }

  .mobile-node:last-child {
    border-bottom: 0;
  }

  .mobile-branches {
    display: grid;
    gap: 0;
  }

  .mobile-node span,
  .mobile-branches span {
    display: block;
    color: var(--muted);
    font-size: var(--text-small);
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }

  .mobile-node strong,
  .mobile-branches strong {
    display: block;
    margin-top: 6px;
    color: var(--paper);
    font-size: var(--text-large);
    font-weight: 400;
  }

  .mobile-node.selected,
  .mobile-branches .selected {
    background: rgba(255, 255, 255, 0.045);
    padding-left: 12px;
    padding-right: 12px;
  }

  .scroll-mark {
    display: none;
  }

  .metric-strip > div {
    min-height: auto;
    padding: 18px 0;
  }

  .bar-stage {
    margin-top: 42px;
  }

  .bar-row {
    gap: 14px;
    padding: 18px 0;
  }

  .bar-track {
    width: 100%;
  }

  .example {
    padding: 22px 0;
  }

  .example-id {
    margin-bottom: 18px;
  }

  .trace {
    gap: 8px;
  }

  .map-wrap {
    margin-right: calc(var(--space) * -1);
    padding-right: var(--space);
  }

  .sweep-map {
    min-width: 640px;
    min-height: 310px;
  }

  .table-wrap {
    overflow: visible;
  }

  table,
  thead,
  tbody,
  tr,
  th,
  td {
    display: block;
  }

  table {
    min-width: 0;
  }

  thead {
    display: none;
  }

  tr {
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
  }

  td {
    display: grid;
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 12px;
    padding: 5px 0;
    border-bottom: 0;
    overflow-wrap: anywhere;
  }

  td::before {
    color: var(--muted);
    font-size: var(--text-small);
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  td:nth-child(1)::before {
    content: "Model";
  }

  td:nth-child(2)::before {
    content: "Family";
  }

  td:nth-child(3)::before {
    content: "Params";
  }

  td:nth-child(4)::before {
    content: "Greedy";
  }

  td:nth-child(5)::before {
    content: "Beam-5";
  }

  td:nth-child(6)::before {
    content: "Overhead";
  }
}

@media (max-width: 390px) {
  :root {
    --space: 16px;
  }

  h1 {
    font-size: 28px;
  }

  h2,
  .closing-line {
    font-size: 20px;
  }

  .brand {
    font-size: 14px;
  }

  .section-heading {
    margin-bottom: 30px;
  }

  td {
    grid-template-columns: 74px minmax(0, 1fr);
  }
}