:root {
  color-scheme: light;
  --ink: #14261f;
  --ink-soft: #4e5b55;
  --paper: #f2f0e6;
  --paper-deep: #e5e1d3;
  --signal: #ec6239;
  --signal-dark: #bd3e1e;
  --acid: #d7ff63;
  --line: rgba(20, 38, 31, 0.22);
  --line-strong: rgba(20, 38, 31, 0.48);
  --shadow: 0 22px 70px rgba(20, 38, 31, 0.13);
  --serif: Baskerville, "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --mono: "Cascadia Code", "Aptos Mono", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.6;
}

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

button,
select,
input[type="range"] {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.paper-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(20, 38, 31, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 38, 31, 0.045) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(to bottom, black, transparent 70%);
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  padding: 10px 14px;
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

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

:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
}

.site-header,
main,
footer {
  width: min(1460px, calc(100% - 56px));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 86px;
  border-bottom: 1px solid var(--line-strong);
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.04em;
}

.brand em {
  color: var(--signal-dark);
  font-family: var(--serif);
  font-weight: 400;
}

.brand-mark {
  display: inline-grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: var(--paper);
  background: var(--ink);
  border-radius: 50%;
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
}

nav {
  display: flex;
  gap: 32px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

nav a {
  text-decoration: none;
}

nav a:hover {
  color: var(--signal-dark);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.55fr);
  gap: clamp(48px, 8vw, 140px);
  align-items: end;
  min-height: 690px;
  padding: 90px 0 76px;
}

.kicker {
  margin: 0 0 26px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.kicker span {
  color: var(--signal-dark);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2 {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.93;
}

h1 {
  max-width: 930px;
  margin-bottom: 34px;
  font-size: clamp(76px, 9.2vw, 142px);
}

h1 span {
  display: block;
  color: var(--signal-dark);
  font-size: 0.4em;
  font-style: italic;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.hero-intro {
  max-width: 740px;
  margin-bottom: 30px;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.42;
}

.text-link {
  display: inline-flex;
  gap: 16px;
  align-items: center;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.text-link span {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--paper);
  background: var(--ink);
  border-radius: 50%;
}

.field-note {
  position: relative;
  padding: 26px;
  background: rgba(242, 240, 230, 0.86);
  border: 1px solid var(--line-strong);
  box-shadow: 12px 12px 0 var(--paper-deep);
}

.field-note::before {
  position: absolute;
  top: -22px;
  right: 24px;
  width: 74px;
  height: 42px;
  background: rgba(215, 255, 99, 0.72);
  content: "";
  transform: rotate(4deg);
}

.field-note-heading {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.field-note-heading span:last-child {
  color: var(--ink-soft);
}

.live-dot {
  width: 8px;
  height: 8px;
  background: #3a8b58;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(58, 139, 88, 0.14);
  animation: pulse 2s ease-in-out infinite;
}

.field-note > p {
  margin: 24px 0;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.5;
}

.field-note dl {
  margin: 0;
}

.field-note dl div {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-size: 11px;
}

.field-note dt {
  color: var(--ink-soft);
}

.field-note dd {
  margin: 0;
  font-weight: 700;
}

.lab-section {
  margin-bottom: 130px;
  scroll-margin-top: 30px;
}

.section-heading {
  display: flex;
  gap: 40px;
  align-items: end;
  justify-content: space-between;
  padding: 32px 0;
  border-top: 1px solid var(--line-strong);
}

.section-heading .kicker {
  margin-bottom: 15px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(48px, 6vw, 84px);
}

.section-heading > p {
  max-width: 400px;
  margin-bottom: 8px;
  color: var(--ink-soft);
  text-align: right;
}

.lab-shell {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  min-height: 980px;
  color: var(--paper);
  background: var(--ink);
  border: 1px solid var(--ink);
  box-shadow: var(--shadow);
}

.control-deck {
  padding: 28px;
  border-right: 1px solid rgba(242, 240, 230, 0.18);
  background:
    radial-gradient(circle at 10% 0, rgba(215, 255, 99, 0.08), transparent 30%),
    var(--ink);
}

.deck-heading,
.generated-output > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.deck-heading {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(242, 240, 230, 0.23);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.quiet-button {
  padding: 0;
  color: inherit;
  background: transparent;
  border: 0;
  border-bottom: 1px solid currentColor;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.field {
  display: grid;
  gap: 9px;
  margin-bottom: 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.field-prompt {
  margin-bottom: 26px;
}

.field small {
  color: rgba(242, 240, 230, 0.55);
  font-size: 9px;
  text-align: right;
}

textarea,
select,
input[type="number"] {
  width: 100%;
  color: var(--paper);
  background: rgba(242, 240, 230, 0.06);
  border: 1px solid rgba(242, 240, 230, 0.26);
  border-radius: 0;
}

textarea {
  min-height: 104px;
  padding: 13px;
  resize: vertical;
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.45;
  text-transform: none;
}

select,
input[type="number"] {
  height: 42px;
  padding: 0 10px;
}

select option {
  color: var(--ink);
  background: var(--paper);
}

fieldset {
  margin: 0 0 26px;
  padding: 20px 0 0;
  border: 0;
  border-top: 1px solid rgba(242, 240, 230, 0.23);
}

legend {
  padding: 0 10px 0 0;
  color: var(--acid);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.range-field > span {
  display: flex;
  justify-content: space-between;
}

output {
  color: var(--acid);
}

input[type="range"] {
  width: 100%;
  height: 18px;
  margin: 0;
  accent-color: var(--signal);
}

.field-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.deck-actions {
  display: grid;
  gap: 10px;
}

.primary-button,
.secondary-button {
  min-height: 48px;
  padding: 12px 16px;
  border: 1px solid var(--acid);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: transform 150ms ease, background 150ms ease;
}

.primary-button {
  color: var(--ink);
  background: var(--acid);
}

.secondary-button {
  color: var(--paper);
  background: transparent;
}

.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-2px);
}

.secondary-button:hover {
  color: var(--ink);
  background: var(--acid);
}

.visual-deck {
  min-width: 0;
  padding: 28px;
  background:
    linear-gradient(rgba(242, 240, 230, 0.026) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 240, 230, 0.026) 1px, transparent 1px);
  background-size: 24px 24px;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-bottom: 28px;
  border: 1px solid rgba(242, 240, 230, 0.22);
}

.metric-strip > div {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 16px 18px;
  border-right: 1px solid rgba(242, 240, 230, 0.18);
}

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

.metric-strip span {
  color: rgba(242, 240, 230, 0.55);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.metric-strip strong {
  color: var(--acid);
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 400;
}

.viz-panel {
  background: rgba(242, 240, 230, 0.035);
  border: 1px solid rgba(242, 240, 230, 0.22);
}

.panel-heading {
  display: flex;
  min-height: 66px;
  align-items: center;
  justify-content: space-between;
  padding: 13px 16px;
  border-bottom: 1px solid rgba(242, 240, 230, 0.18);
}

.panel-heading > div {
  display: flex;
  gap: 12px;
  align-items: center;
}

.panel-heading h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 400;
}

.panel-heading p,
.mode-label {
  margin: 0;
  color: rgba(242, 240, 230, 0.55);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel-index {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  color: var(--ink);
  background: var(--signal);
  border-radius: 50%;
  font-size: 10px;
  font-weight: 700;
}

.token-panel {
  margin-bottom: 22px;
}

.token-ribbon {
  display: flex;
  gap: 7px;
  min-height: 112px;
  align-items: center;
  padding: 17px;
  overflow-x: auto;
  scrollbar-color: var(--signal) rgba(242, 240, 230, 0.08);
}

.token-chip {
  position: relative;
  display: grid;
  min-width: 57px;
  height: 70px;
  place-items: center;
  background: var(--paper);
  border-top: 3px solid var(--signal);
  color: var(--ink);
  flex: 0 0 auto;
  animation: enter 280ms ease both;
}

.token-chip b {
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 400;
}

.token-chip small {
  position: absolute;
  right: 5px;
  bottom: 3px;
  color: var(--ink-soft);
  font-size: 8px;
}

.token-chip.is-truncated {
  min-width: 34px;
  color: rgba(242, 240, 230, 0.6);
  background: transparent;
  border: 1px dashed rgba(242, 240, 230, 0.25);
}

.viz-grid {
  display: grid;
  grid-template-columns: minmax(340px, 1.15fr) minmax(310px, 0.85fr);
  gap: 22px;
}

.compact-field {
  display: flex;
  gap: 8px;
  align-items: center;
  color: rgba(242, 240, 230, 0.6);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.compact-field select {
  width: 70px;
  height: 32px;
}

.canvas-wrap {
  position: relative;
  width: min(100%, 660px);
  margin: 0 auto;
  padding: 20px;
}

#attentionCanvas {
  display: block;
  width: 100%;
  height: auto;
}

.canvas-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: rgba(242, 240, 230, 0.6);
}

.attention-key {
  display: flex;
  gap: 9px;
  align-items: center;
  padding: 0 20px 17px;
  color: rgba(242, 240, 230, 0.55);
  font-size: 8px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.attention-key i {
  width: 70px;
  height: 6px;
  background: linear-gradient(90deg, rgba(236, 98, 57, 0.12), var(--signal));
}

.attention-key b {
  margin-left: auto;
  color: var(--acid);
  font-weight: 400;
}

.distribution {
  display: grid;
  gap: 14px;
  min-height: 430px;
  align-content: start;
  padding: 24px 20px;
}

.distribution-row {
  display: grid;
  grid-template-columns: 27px minmax(0, 1fr) 52px;
  gap: 10px;
  align-items: center;
  font-size: 10px;
}

.distribution-token {
  color: var(--acid);
  font-family: var(--serif);
  font-size: 18px;
  text-align: center;
}

.bar-track {
  height: 11px;
  background: rgba(242, 240, 230, 0.08);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: var(--signal);
  transform-origin: left;
  animation: stretch 420ms ease both;
}

.distribution-value {
  color: rgba(242, 240, 230, 0.62);
  text-align: right;
}

.generated-output {
  margin: 0 20px 20px;
  padding: 16px;
  color: var(--ink);
  background: var(--acid);
}

.generated-output > div > span {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.generated-output p {
  min-height: 76px;
  margin: 14px 0 8px;
  overflow-wrap: anywhere;
  font-family: var(--serif);
  font-size: 20px;
  line-height: 1.35;
}

.generated-output small {
  color: rgba(20, 38, 31, 0.66);
  font-size: 9px;
}

.architecture {
  margin-bottom: 130px;
  scroll-margin-top: 30px;
}

.architecture-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-strong);
  background: rgba(242, 240, 230, 0.64);
}

.architecture-flow li {
  position: relative;
  min-height: 320px;
  padding: 28px;
  border-right: 1px solid var(--line-strong);
}

.architecture-flow li:last-child {
  border-right: 0;
}

.architecture-flow li > span {
  display: block;
  color: var(--signal-dark);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.architecture-flow h3 {
  margin: 54px 0 16px;
  font-family: var(--serif);
  font-size: 44px;
  font-weight: 400;
  letter-spacing: -0.04em;
}

.architecture-flow p {
  max-width: 360px;
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: 18px;
}

.architecture-flow code {
  position: absolute;
  right: 28px;
  bottom: 26px;
  left: 28px;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  color: var(--signal-dark);
  font-size: 11px;
}

footer {
  display: flex;
  min-height: 190px;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line-strong);
}

footer > div {
  display: flex;
  gap: 15px;
  align-items: center;
}

footer p {
  margin: 0;
}

footer > p {
  display: flex;
  flex-direction: column;
  gap: 7px;
  color: var(--ink-soft);
  font-size: 10px;
  text-align: right;
}

footer a {
  color: var(--ink);
  font-weight: 700;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

@keyframes enter {
  from { opacity: 0; transform: translateY(8px); }
}

@keyframes stretch {
  from { transform: scaleX(0); }
}

@media (max-width: 1120px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .field-note {
    max-width: 620px;
  }

  .lab-shell {
    grid-template-columns: 300px minmax(0, 1fr);
  }

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

@media (max-width: 820px) {
  .site-header,
  main,
  footer {
    width: min(100% - 30px, 1460px);
  }

  .site-header {
    align-items: flex-start;
    padding: 18px 0;
  }

  nav {
    gap: 15px;
    font-size: 9px;
  }

  nav a:nth-child(2) {
    display: none;
  }

  .hero {
    gap: 55px;
    padding: 70px 0;
  }

  h1 {
    font-size: clamp(62px, 18vw, 105px);
  }

  .section-heading {
    display: block;
  }

  .section-heading > p {
    margin: 18px 0 0;
    text-align: left;
  }

  .lab-shell {
    display: block;
  }

  .control-deck {
    border-right: 0;
    border-bottom: 1px solid rgba(242, 240, 230, 0.18);
  }

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

  .architecture-flow li {
    border-right: 0;
    border-bottom: 1px solid var(--line-strong);
  }

  .architecture-flow li:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 560px) {
  .brand em {
    display: none;
  }

  .brand-mark {
    width: 31px;
    height: 31px;
  }

  .hero-intro {
    font-size: 19px;
  }

  .field-note {
    box-shadow: 7px 7px 0 var(--paper-deep);
  }

  .lab-section,
  .architecture {
    margin-bottom: 80px;
  }

  .control-deck,
  .visual-deck {
    padding: 18px;
  }

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

  .metric-strip > div:nth-child(2) {
    border-right: 0;
  }

  .metric-strip > div:nth-child(-n + 2) {
    border-bottom: 1px solid rgba(242, 240, 230, 0.18);
  }

  .panel-heading {
    align-items: flex-start;
  }

  .panel-heading p {
    display: none;
  }

  .canvas-wrap {
    padding: 10px;
  }

  .attention-key b {
    display: none;
  }

  .distribution {
    min-height: auto;
    padding-inline: 14px;
  }

  .generated-output {
    margin-inline: 14px;
  }

  footer {
    display: grid;
    gap: 28px;
    padding: 42px 0;
  }

  footer > p {
    text-align: left;
  }
}

@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;
  }
}