/* ============================================================
   Where can you change an AI? — editorial field note
   ============================================================ */

:root {
  --ai-forest: #17231b;
  --ai-forest-2: #213229;
  --ai-forest-3: #2a4033;
  --ai-paper: #f7f2e9;
  --ai-cream: #eee7db;
  --ai-white: #fffdf8;
  --ai-ink: #17231b;
  --ai-ink-soft: #58635b;
  --ai-lime: #d9f99d;
  --ai-lime-strong: #bfe87a;
  --ai-green: #83b271;
  --ai-coral: #f17251;
  --ai-peach: #f2a681;
  --ai-lilac: #c9bcf6;
  --ai-sky: #b9ddeb;
  --ai-sun: #f6cf64;
  --ai-line: rgba(23, 35, 27, 0.14);
  --ai-line-light: rgba(247, 242, 233, 0.16);
  --ai-sans: "DM Sans", system-ui, -apple-system, sans-serif;
  --ai-serif: "Fraunces", Georgia, serif;
  --ai-mono: "JetBrains Mono", ui-monospace, monospace;
}

.explainer-html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body.explainer-body {
  margin: 0;
  overflow-x: hidden;
  background: var(--ai-paper);
  color: var(--ai-ink);
  font-family: var(--ai-sans);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

.explainer-body ::selection {
  background: var(--ai-lime);
  color: var(--ai-ink);
}

.explainer-body button,
.explainer-body a {
  font: inherit;
}

.explainer-body a {
  color: inherit;
}

.explainer-body a:focus-visible,
.explainer-body button:focus-visible {
  outline: 3px solid var(--ai-coral);
  outline-offset: 3px;
}

.ai-skip-link {
  position: fixed;
  z-index: 100;
  top: 0.6rem;
  left: 50%;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  background: var(--ai-lime);
  color: var(--ai-ink);
  font-size: 0.8rem;
  font-weight: 700;
  text-decoration: none;
  transform: translate(-50%, -180%);
  transition: transform 180ms ease;
}

.ai-skip-link:focus {
  transform: translate(-50%, 0);
}

.ai-shell {
  width: min(calc(100% - 3rem), 78rem);
  margin-inline: auto;
}

.ai-reading {
  width: min(calc(100% - 3rem), 58rem);
  margin-inline: auto;
}

/* ---------- Navigation ---------- */

.ai-nav {
  position: fixed;
  z-index: 50;
  top: 0;
  right: 0;
  left: 0;
  background: rgba(247, 242, 233, 0.92);
  color: var(--ai-ink);
  border-bottom: 1px solid rgba(23, 35, 27, 0.1);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.ai-nav__inner {
  display: flex;
  width: min(calc(100% - 2rem), 90rem);
  min-height: 4.35rem;
  margin-inline: auto;
  align-items: center;
  gap: 0.85rem;
}

.ai-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: inherit;
  text-decoration: none;
}

.ai-brand__mark {
  display: inline-grid;
  width: 1.8rem;
  height: 1.8rem;
  flex: 0 0 auto;
  place-items: center;
  border: 2px solid currentColor;
  border-radius: 50%;
  transition: transform 300ms ease;
}

.ai-brand:hover .ai-brand__mark {
  transform: rotate(90deg);
}

.ai-brand__mark span {
  width: 0.54rem;
  height: 0.54rem;
  border-radius: 50%;
  background: var(--ai-coral);
}

.ai-brand__name {
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  white-space: nowrap;
}

.ai-nav__divider {
  width: 1px;
  height: 1.3rem;
  margin-left: 0.2rem;
  background: var(--ai-line);
}

.ai-nav__series,
.ai-nav__read-time {
  color: #6a746d;
  font-family: var(--ai-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.075em;
  text-transform: uppercase;
  white-space: nowrap;
}

.ai-nav__links {
  display: flex;
  margin-left: auto;
  align-items: center;
  gap: 1.65rem;
}

.ai-nav__links a {
  color: var(--ai-ink-soft);
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
  transition: color 160ms ease;
}

.ai-nav__links a:hover {
  color: var(--ai-ink);
}

.ai-nav__read-time {
  margin-left: 0.65rem;
  padding: 0.52rem 0.7rem;
  border: 1px solid var(--ai-line);
  border-radius: 999px;
  color: var(--ai-ink);
}

.ai-nav__progress {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--ai-coral);
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}

/* ---------- Shared type ---------- */

.ai-kicker {
  display: flex;
  margin: 0 0 1.2rem;
  align-items: center;
  gap: 0.7rem;
  color: var(--ai-ink);
  font-family: var(--ai-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: 1;
  text-transform: uppercase;
}

.ai-kicker--lime {
  color: var(--ai-lime);
}

.ai-kicker__line {
  width: 2.7rem;
  height: 1px;
  background: currentColor;
  opacity: 0.55;
}

.ai-stage-number {
  display: inline-grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  letter-spacing: 0;
}

.ai-eyebrow {
  margin: 0;
  font-family: var(--ai-mono);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.11em;
  line-height: 1.4;
  text-transform: uppercase;
}

.ai-section-number {
  margin: 0 0 1.4rem;
  color: var(--ai-coral);
  font-family: var(--ai-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-align: center;
  text-transform: uppercase;
}

/* ---------- Hero ---------- */

.ai-hero {
  position: relative;
  display: grid;
  min-height: min(100svh, 76rem);
  padding: 8rem 0 6rem;
  place-items: center;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 12% 88%, rgba(217, 249, 157, 0.1), transparent 28%),
    radial-gradient(circle at 92% 12%, rgba(241, 114, 81, 0.12), transparent 29%),
    var(--ai-forest);
  color: var(--ai-paper);
}

.ai-hero__grid {
  position: absolute;
  z-index: -2;
  inset: 0;
  background-image:
    linear-gradient(rgba(247, 242, 233, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 242, 233, 0.035) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(to bottom, black 0%, transparent 93%);
}

.ai-orbit {
  position: absolute;
  z-index: -1;
  border: 1px solid rgba(217, 249, 157, 0.1);
  border-radius: 50%;
  pointer-events: none;
}

.ai-orbit--one {
  top: -20rem;
  right: -11rem;
  width: 47rem;
  height: 47rem;
}

.ai-orbit--two {
  right: 17%;
  bottom: -28rem;
  width: 52rem;
  height: 52rem;
}

.ai-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(27rem, 0.95fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 7.5rem);
}

.ai-hero__copy h1 {
  max-width: 48rem;
  margin: 0;
  color: var(--ai-paper);
  font-size: clamp(4.1rem, 7.3vw, 7.8rem);
  font-weight: 700;
  letter-spacing: -0.075em;
  line-height: 0.84;
}

.ai-hero__copy h1 em {
  color: var(--ai-lime);
  font-family: var(--ai-serif);
  font-weight: 600;
}

.ai-hero__dek {
  max-width: 42rem;
  margin: 2rem 0 0;
  color: rgba(247, 242, 233, 0.67);
  font-size: clamp(1.08rem, 1.55vw, 1.35rem);
  line-height: 1.55;
}

.ai-hero__dek strong {
  color: var(--ai-paper);
  font-weight: 650;
}

.ai-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2.1rem;
}

.ai-hero__meta span {
  padding: 0.45rem 0.65rem;
  border: 1px solid rgba(247, 242, 233, 0.17);
  border-radius: 999px;
  color: rgba(247, 242, 233, 0.56);
  font-family: var(--ai-mono);
  font-size: 0.58rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ai-hero-stack {
  position: relative;
  width: min(100%, 35rem);
  margin: 0;
  padding: 1.2rem;
  border: 1px solid rgba(247, 242, 233, 0.15);
  border-radius: 1.4rem;
  background: rgba(247, 242, 233, 0.045);
  box-shadow: 0 35px 80px rgba(0, 0, 0, 0.23);
  backdrop-filter: blur(10px);
}

.ai-hero-stack::before {
  position: absolute;
  z-index: -1;
  top: -1.4rem;
  right: -1.35rem;
  bottom: 2rem;
  left: 2.2rem;
  border: 1px solid rgba(217, 249, 157, 0.1);
  border-radius: 1.4rem;
  content: "";
}

.ai-hero-stack figcaption {
  margin-bottom: 0.8rem;
  color: rgba(247, 242, 233, 0.43);
  font-family: var(--ai-mono);
  font-size: 0.58rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.ai-hero-stack__layer {
  display: grid;
  min-height: 5.7rem;
  padding: 1rem 1.05rem;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.9rem;
  border: 1px solid rgba(247, 242, 233, 0.13);
  border-radius: 0.85rem;
  background: rgba(247, 242, 233, 0.055);
}

.ai-hero-stack__layer--surface {
  border-color: rgba(217, 249, 157, 0.4);
  background: var(--ai-lime);
  color: var(--ai-ink);
  box-shadow: 0 12px 36px rgba(217, 249, 157, 0.08);
}

.ai-hero-stack__layer--inference {
  margin-bottom: 0.58rem;
}

.ai-hero-stack__layer--core {
  background: rgba(201, 188, 246, 0.1);
}

.ai-layer-index {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--ai-mono);
  font-size: 0.58rem;
  opacity: 0.55;
}

.ai-hero-stack__layer small,
.ai-control-layer small,
.ai-control-stack__training small {
  display: block;
  margin-bottom: 0.22rem;
  color: currentColor;
  font-family: var(--ai-mono);
  font-size: 0.54rem;
  letter-spacing: 0.08em;
  opacity: 0.55;
  text-transform: uppercase;
}

.ai-hero-stack__layer strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 650;
}

.ai-layer-status {
  padding: 0.38rem 0.48rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--ai-mono);
  font-size: 0.49rem;
  letter-spacing: 0.04em;
  opacity: 0.58;
  text-transform: uppercase;
}

.ai-hero-stack__flow {
  display: flex;
  height: 1.45rem;
  align-items: center;
  justify-content: center;
  gap: 0.23rem;
}

.ai-hero-stack__flow span {
  width: 0.22rem;
  height: 0.22rem;
  border-radius: 50%;
  background: var(--ai-lime);
  opacity: 0.48;
}

.ai-hero-stack__boundary {
  display: flex;
  margin: 0.2rem 0 0.58rem;
  align-items: center;
  gap: 0.7rem;
  color: rgba(247, 242, 233, 0.38);
  font-family: var(--ai-mono);
  font-size: 0.51rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.ai-hero-stack__boundary::before,
.ai-hero-stack__boundary::after {
  height: 1px;
  flex: 1;
  background: rgba(247, 242, 233, 0.13);
  content: "";
}

.ai-hero-stack__boundary span:last-child {
  display: none;
}

.ai-hero-stack__note {
  display: flex;
  margin: 1rem 0 0;
  align-items: start;
  gap: 0.55rem;
  color: rgba(247, 242, 233, 0.47);
  font-family: var(--ai-serif);
  font-size: 0.8rem;
  font-style: italic;
}

.ai-hero-stack__note span {
  color: var(--ai-coral);
  font-family: var(--ai-sans);
  font-style: normal;
}

.ai-scroll-cue {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: rgba(247, 242, 233, 0.38);
  font-family: var(--ai-mono);
  font-size: 0.57rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  transform: translateX(-50%);
}

.ai-scroll-cue svg {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: var(--ai-lime);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
  animation: ai-nudge 1.7s ease-in-out infinite;
}

@keyframes ai-nudge {
  0%, 100% { transform: translateY(-2px); }
  50% { transform: translateY(4px); }
}

/* ---------- Sections ---------- */

.ai-section {
  position: relative;
  padding: clamp(6rem, 10vw, 9rem) 0;
}

.ai-section--paper {
  background: var(--ai-paper);
}

.ai-section--cream {
  background: var(--ai-cream);
}

.ai-section--forest {
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 4% 45%, rgba(217, 249, 157, 0.08), transparent 24%),
    radial-gradient(circle at 95% 82%, rgba(201, 188, 246, 0.08), transparent 28%),
    var(--ai-forest);
  color: var(--ai-paper);
}

.ai-section-heading {
  max-width: 57rem;
  margin-bottom: clamp(3rem, 6vw, 5rem);
}

.ai-section-heading h2 {
  margin: 0;
  font-size: clamp(2.7rem, 5.2vw, 5.3rem);
  font-weight: 700;
  letter-spacing: -0.065em;
  line-height: 0.96;
}

.ai-section-heading > p:last-child {
  max-width: 43rem;
  margin: 1.35rem 0 0;
  color: var(--ai-ink-soft);
  font-size: clamp(1rem, 1.3vw, 1.2rem);
  line-height: 1.58;
}

.ai-section-heading--split {
  display: grid;
  max-width: none;
  grid-template-columns: minmax(0, 1.15fr) minmax(20rem, 0.7fr);
  align-items: end;
  gap: clamp(2rem, 8vw, 8rem);
}

.ai-section-heading--split h2 {
  max-width: 50rem;
}

.ai-section-heading--split > p {
  margin: 0 0 0.2rem;
  color: var(--ai-ink-soft);
  font-size: clamp(1rem, 1.3vw, 1.2rem);
  line-height: 1.58;
}

.ai-section-heading--light h2 {
  color: var(--ai-paper);
}

.ai-section-heading--light > p:last-child {
  color: rgba(247, 242, 233, 0.56);
}

.ai-display-quote {
  margin: 0;
  font-size: clamp(2.7rem, 5.3vw, 5.2rem);
  font-weight: 650;
  letter-spacing: -0.06em;
  line-height: 1.02;
  text-align: center;
}

.ai-display-quote em {
  color: #5c784e;
  font-family: var(--ai-serif);
  font-weight: 600;
}

.ai-prose {
  color: var(--ai-ink-soft);
  font-size: clamp(1.04rem, 1.35vw, 1.2rem);
  line-height: 1.75;
}

.ai-prose--lead {
  display: grid;
  margin-top: 3rem;
  grid-template-columns: 1fr 1fr;
  gap: 2.8rem;
}

.ai-prose p {
  margin: 0;
}

.ai-prose strong {
  color: var(--ai-ink);
  font-weight: 650;
}

/* ---------- Thesis ---------- */

.ai-thesis-grid {
  display: grid;
  margin-top: clamp(4rem, 8vw, 7rem);
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.ai-thesis-card {
  position: relative;
  min-height: 27rem;
  padding: clamp(2rem, 4vw, 3.2rem);
  overflow: hidden;
  border: 1px solid var(--ai-line);
  border-radius: 1.35rem;
}

.ai-thesis-card::after {
  position: absolute;
  right: -4rem;
  bottom: -4rem;
  width: 13rem;
  height: 13rem;
  border: 1px solid currentColor;
  border-radius: 50%;
  content: "";
  opacity: 0.1;
}

.ai-thesis-card--skill {
  background: var(--ai-lime);
}

.ai-thesis-card--weights {
  background: var(--ai-forest);
  color: var(--ai-paper);
}

.ai-thesis-card__icon {
  display: grid;
  width: 4.6rem;
  height: 4.6rem;
  margin-bottom: 4.2rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.ai-thesis-card__icon svg {
  width: 2.4rem;
  height: 2.4rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.ai-thesis-card h3 {
  max-width: 30rem;
  margin: 0.7rem 0 1rem;
  font-size: clamp(1.7rem, 2.6vw, 2.45rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

.ai-thesis-card p:not(.ai-eyebrow) {
  max-width: 32rem;
  margin: 0;
  color: currentColor;
  font-size: 1rem;
  line-height: 1.62;
  opacity: 0.7;
}

.ai-thesis-card__tag {
  display: inline-block;
  margin-top: 1.7rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--ai-mono);
  font-size: 0.56rem;
  letter-spacing: 0.07em;
  opacity: 0.68;
  text-transform: uppercase;
}

.ai-margin-note {
  display: grid;
  max-width: 57rem;
  margin: 1.2rem auto 0;
  padding: 1.5rem 1.7rem;
  grid-template-columns: auto 1fr;
  gap: 1.3rem;
  border: 1px dashed rgba(23, 35, 27, 0.22);
  border-radius: 0.8rem;
  transform: rotate(-0.45deg);
}

.ai-margin-note__mark {
  align-self: start;
  padding: 0.42rem 0.55rem;
  background: var(--ai-sun);
  font-family: var(--ai-serif);
  font-size: 0.75rem;
  font-style: italic;
  white-space: nowrap;
  transform: rotate(-2deg);
}

.ai-margin-note p {
  margin: 0;
  color: var(--ai-ink-soft);
  font-size: 0.93rem;
  line-height: 1.6;
}

.ai-margin-note strong {
  color: var(--ai-ink);
}

/* ---------- Definitions ---------- */

.ai-definition-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}

.ai-definition-card {
  position: relative;
  min-height: 31rem;
  padding: 2rem;
  border: 1px solid var(--ai-line);
  border-radius: 1.15rem;
  background: rgba(255, 253, 248, 0.36);
}

.ai-definition-card--featured {
  background: var(--ai-white);
  box-shadow: 0 20px 45px rgba(23, 35, 27, 0.07);
  transform: translateY(-1rem);
}

.ai-definition-card__number {
  color: #7c857e;
  font-family: var(--ai-mono);
  font-size: 0.58rem;
}

.ai-definition-card__lock {
  display: grid;
  width: 5.2rem;
  height: 5.2rem;
  margin: 3rem 0 2.1rem;
  place-items: center;
  border-radius: 50%;
  background: var(--ai-lime);
}

.ai-definition-card__lock--closed {
  background: var(--ai-peach);
}

.ai-definition-card__lock--source {
  background: var(--ai-lilac);
}

.ai-definition-card__lock svg {
  width: 2.5rem;
  height: 2.5rem;
  fill: none;
  stroke: var(--ai-ink);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.ai-definition-card h3 {
  margin: 0 0 0.8rem;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.ai-definition-card > p {
  min-height: 8rem;
  margin: 0;
  color: var(--ai-ink-soft);
  font-size: 0.95rem;
  line-height: 1.62;
}

.ai-definition-card ul {
  display: grid;
  margin: 1.5rem 0 0;
  padding: 1.25rem 0 0;
  gap: 0.7rem;
  border-top: 1px solid var(--ai-line);
  list-style: none;
}

.ai-definition-card li {
  position: relative;
  padding-left: 1.15rem;
  color: var(--ai-ink-soft);
  font-size: 0.82rem;
  line-height: 1.45;
}

.ai-definition-card li::before {
  position: absolute;
  top: 0.5em;
  left: 0;
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 50%;
  background: var(--ai-coral);
  content: "";
}

.ai-source-line {
  margin: 2rem 0 0;
  color: #6e776f;
  font-family: var(--ai-mono);
  font-size: 0.61rem;
  line-height: 1.7;
}

.ai-source-line a {
  color: var(--ai-ink);
  text-decoration-color: rgba(23, 35, 27, 0.35);
  text-underline-offset: 0.2em;
}

.ai-source-line span {
  margin-left: 0.3rem;
  color: var(--ai-coral);
  text-transform: uppercase;
}

/* ---------- Skill anatomy ---------- */

.ai-skill-anatomy {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(22rem, 0.75fr);
  align-items: center;
  gap: clamp(3rem, 8vw, 8rem);
}

.ai-skill-folder {
  position: relative;
  padding-top: 2.35rem;
}

.ai-skill-folder::before {
  position: absolute;
  z-index: 0;
  top: 3.25rem;
  right: -0.8rem;
  bottom: -0.8rem;
  left: 0.8rem;
  border: 1px solid rgba(23, 35, 27, 0.11);
  border-radius: 0.8rem;
  content: "";
}

.ai-skill-folder__tab {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 0;
  min-width: 12rem;
  padding: 0.8rem 1.2rem 1.5rem;
  border-radius: 0.8rem 0.8rem 0 0;
  background: var(--ai-sun);
  font-family: var(--ai-mono);
  font-size: 0.65rem;
  font-weight: 600;
}

.ai-skill-folder__body {
  position: relative;
  z-index: 1;
  display: grid;
  padding: 1rem;
  gap: 0.55rem;
  border: 1px solid rgba(23, 35, 27, 0.14);
  border-radius: 0.9rem;
  background: var(--ai-white);
  box-shadow: 0 24px 60px rgba(23, 35, 27, 0.08);
}

.ai-file-row {
  display: grid;
  min-height: 4.65rem;
  padding: 0.85rem 0.95rem;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.85rem;
  border: 1px solid var(--ai-line);
  border-radius: 0.62rem;
  background: var(--ai-paper);
}

.ai-file-row--primary {
  border-color: rgba(23, 35, 27, 0.22);
  background: var(--ai-lime);
}

.ai-file-icon {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 0.45rem;
  font-family: var(--ai-mono);
  font-size: 0.58rem;
  font-weight: 600;
}

.ai-file-row strong {
  display: block;
  font-family: var(--ai-mono);
  font-size: 0.74rem;
}

.ai-file-row small {
  display: block;
  margin-top: 0.2rem;
  color: var(--ai-ink-soft);
  font-size: 0.71rem;
}

.ai-file-badge {
  padding: 0.36rem 0.46rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--ai-mono);
  font-size: 0.48rem;
  opacity: 0.5;
  text-transform: uppercase;
}

.ai-skill-explanation h3 {
  margin: 0.8rem 0 1.2rem;
  font-size: clamp(2rem, 3.2vw, 3.15rem);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.ai-skill-explanation > p:not(.ai-eyebrow) {
  margin: 0;
  color: var(--ai-ink-soft);
  font-size: 1rem;
  line-height: 1.68;
}

.ai-skill-property {
  display: grid;
  margin-top: 1.5rem;
  padding-top: 1rem;
  grid-template-columns: 7rem 1fr;
  gap: 1rem;
  border-top: 1px solid var(--ai-line);
}

.ai-skill-property span {
  color: #777f79;
  font-family: var(--ai-mono);
  font-size: 0.56rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.ai-skill-property strong {
  font-size: 0.86rem;
  font-weight: 650;
}

.ai-runtime-flow {
  display: grid;
  margin-top: clamp(5rem, 9vw, 8rem);
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 0.8rem;
}

.ai-runtime-flow article {
  position: relative;
  min-height: 13rem;
  padding: 1.35rem;
  border: 1px solid var(--ai-line);
  border-radius: 0.9rem;
  background: rgba(255, 253, 248, 0.56);
}

.ai-runtime-flow article > span {
  position: absolute;
  top: 1rem;
  right: 1rem;
  color: #9ba19c;
  font-family: var(--ai-mono);
  font-size: 0.54rem;
}

.ai-runtime-flow__icon {
  display: grid;
  width: 3rem;
  height: 3rem;
  margin-bottom: 1.65rem;
  place-items: center;
  border-radius: 50%;
  background: var(--ai-lime);
}

.ai-runtime-flow__icon svg {
  width: 1.55rem;
  height: 1.55rem;
  fill: none;
  stroke: var(--ai-ink);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.ai-runtime-flow h3 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
  font-weight: 700;
}

.ai-runtime-flow p {
  margin: 0;
  color: var(--ai-ink-soft);
  font-size: 0.78rem;
  line-height: 1.5;
}

.ai-runtime-flow > i {
  color: #969e98;
  font-family: var(--ai-mono);
  font-size: 0.9rem;
  font-style: normal;
}

.ai-boundary-callout {
  display: grid;
  margin-top: 1rem;
  padding: clamp(2rem, 4vw, 3.3rem);
  grid-template-columns: auto 1fr;
  gap: 1.5rem;
  border-radius: 1rem;
  background: var(--ai-forest);
  color: var(--ai-paper);
}

.ai-boundary-callout__icon {
  display: grid;
  width: 3.2rem;
  height: 3.2rem;
  place-items: center;
  border: 1px solid rgba(247, 242, 233, 0.35);
  border-radius: 50%;
  color: var(--ai-lime);
  font-family: var(--ai-serif);
  font-size: 1.35rem;
  font-style: italic;
}

.ai-boundary-callout h3 {
  margin: 0.65rem 0 0.7rem;
  color: var(--ai-lime);
  font-size: clamp(1.6rem, 2.6vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.045em;
}

.ai-boundary-callout p:not(.ai-eyebrow) {
  max-width: 60rem;
  margin: 0;
  color: rgba(247, 242, 233, 0.65);
  font-size: 0.96rem;
  line-height: 1.7;
}

.ai-boundary-callout em {
  color: var(--ai-paper);
  font-family: var(--ai-serif);
}

/* ---------- Interactive control stack ---------- */

.ai-forest-orbit {
  position: absolute;
  z-index: -1;
  border: 1px solid rgba(217, 249, 157, 0.08);
  border-radius: 50%;
}

.ai-forest-orbit--one {
  top: -20rem;
  right: -20rem;
  width: 48rem;
  height: 48rem;
}

.ai-forest-orbit--two {
  bottom: -26rem;
  left: -18rem;
  width: 55rem;
  height: 55rem;
}

.ai-control__layout {
  display: grid;
  grid-template-columns: minmax(24rem, 0.8fr) minmax(30rem, 1.1fr);
  align-items: center;
  gap: clamp(3rem, 8vw, 8rem);
}

.ai-control-stack {
  position: relative;
  padding: 1.1rem;
  border: 1px solid var(--ai-line-light);
  border-radius: 1.25rem;
  background: rgba(247, 242, 233, 0.035);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.18);
}

.ai-control-stack__outcome {
  display: flex;
  padding: 0.75rem 0.9rem;
  align-items: center;
  justify-content: space-between;
  border-radius: 0.55rem;
  background: rgba(247, 242, 233, 0.08);
  color: rgba(247, 242, 233, 0.65);
  font-family: var(--ai-mono);
  font-size: 0.54rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ai-control-stack__outcome strong {
  color: var(--ai-paper);
  font-size: 0.55rem;
}

.ai-control-stack__connector {
  display: grid;
  height: 1.3rem;
  place-items: center;
}

.ai-control-stack__connector span {
  width: 1px;
  height: 100%;
  background: rgba(247, 242, 233, 0.2);
}

.ai-control-layer {
  position: relative;
  display: grid;
  width: 100%;
  min-height: 5.3rem;
  padding: 0.9rem 1rem;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.9rem;
  border: 1px solid var(--ai-line-light);
  border-radius: 0.72rem;
  background: rgba(247, 242, 233, 0.045);
  color: var(--ai-paper);
  text-align: left;
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease, color 180ms ease, transform 180ms ease;
}

.ai-control-layer + .ai-control-layer {
  margin-top: 0.55rem;
}

.ai-control-layer:hover {
  border-color: rgba(217, 249, 157, 0.34);
  transform: translateX(0.18rem);
}

.ai-control-layer.is-active {
  border-color: var(--ai-lime);
  background: var(--ai-lime);
  color: var(--ai-ink);
}

.ai-control-layer__index {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--ai-mono);
  font-size: 0.54rem;
  opacity: 0.54;
}

.ai-control-layer strong,
.ai-control-stack__training strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 650;
}

.ai-control-layer__pulse {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.2;
}

.ai-control-layer.is-active .ai-control-layer__pulse {
  box-shadow: 0 0 0 0 rgba(23, 35, 27, 0.25);
  opacity: 1;
  animation: ai-pulse 1.8s ease-out infinite;
}

@keyframes ai-pulse {
  70% { box-shadow: 0 0 0 0.55rem rgba(23, 35, 27, 0); }
  100% { box-shadow: 0 0 0 0 rgba(23, 35, 27, 0); }
}

.ai-control-stack__boundary {
  display: grid;
  height: 2.3rem;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 0.7rem;
  color: rgba(247, 242, 233, 0.34);
  font-family: var(--ai-mono);
  font-size: 0.47rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-control-stack__boundary i {
  height: 1px;
  background: repeating-linear-gradient(90deg, rgba(247, 242, 233, 0.2) 0 5px, transparent 5px 10px);
}

.ai-control-stack__training {
  display: grid;
  min-height: 5.3rem;
  margin-top: 0.55rem;
  padding: 0.9rem 1rem;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.9rem;
  border: 1px solid rgba(201, 188, 246, 0.22);
  border-radius: 0.72rem;
  color: rgba(247, 242, 233, 0.5);
}

.ai-control-stack__research {
  font-family: var(--ai-mono);
  font-size: 0.43rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.ai-control-panel {
  overflow: hidden;
  border: 1px solid rgba(247, 242, 233, 0.16);
  border-radius: 1.2rem;
  background: var(--ai-paper);
  color: var(--ai-ink);
  box-shadow: 0 35px 80px rgba(0, 0, 0, 0.22);
}

.ai-control-switcher {
  display: grid;
  padding: 0.45rem;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--ai-line);
  background: var(--ai-cream);
}

.ai-control-switcher button {
  padding: 0.75rem 0.7rem;
  border: 0;
  border-radius: 0.55rem;
  background: transparent;
  color: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 0.59rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
}

.ai-control-switcher button.is-active {
  background: var(--ai-white);
  color: var(--ai-ink);
  box-shadow: 0 2px 8px rgba(23, 35, 27, 0.07);
}

.ai-control-panel__content {
  min-height: 28rem;
  padding: clamp(2rem, 4vw, 3.4rem);
}

.ai-control-panel__kicker {
  margin: 0 0 2.6rem;
  color: #69736c;
  font-family: var(--ai-mono);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-control-panel__content h3 {
  max-width: 38rem;
  margin: 0;
  font-size: clamp(2rem, 3.4vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 1.01;
}

.ai-control-panel__content > p:not(.ai-control-panel__kicker) {
  max-width: 38rem;
  margin: 1.2rem 0 0;
  color: var(--ai-ink-soft);
  font-size: 0.96rem;
  line-height: 1.65;
}

.ai-control-panel__facts {
  display: grid;
  margin: 2.2rem 0 0;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.ai-control-panel__facts div {
  padding-top: 0.9rem;
  border-top: 1px solid var(--ai-line);
}

.ai-control-panel__facts dt {
  margin-bottom: 0.5rem;
  color: #7d857f;
  font-family: var(--ai-mono);
  font-size: 0.52rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-control-panel__facts dd {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1.5;
}

.ai-control-panel__example {
  border-top: 1px solid rgba(247, 242, 233, 0.1);
  background: #101812;
  color: var(--ai-paper);
}

.ai-control-panel__terminal-bar {
  display: flex;
  padding: 0.75rem 1rem;
  align-items: center;
  gap: 0.35rem;
  border-bottom: 1px solid rgba(247, 242, 233, 0.08);
}

.ai-control-panel__terminal-bar span {
  width: 0.48rem;
  height: 0.48rem;
  border-radius: 50%;
  background: rgba(247, 242, 233, 0.22);
}

.ai-control-panel__terminal-bar span:first-child {
  background: var(--ai-coral);
}

.ai-control-panel__terminal-bar small {
  margin-left: auto;
  color: rgba(247, 242, 233, 0.32);
  font-family: var(--ai-mono);
  font-size: 0.48rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ai-control-panel__example code {
  display: block;
  min-height: 5.5rem;
  padding: 1.5rem;
  color: var(--ai-lime);
  font-family: var(--ai-mono);
  font-size: 0.69rem;
  line-height: 1.6;
  white-space: normal;
}

.ai-control__caption {
  max-width: 52rem;
  margin: 3rem auto 0;
  color: rgba(247, 242, 233, 0.48);
  font-family: var(--ai-serif);
  font-size: 1.05rem;
  font-style: italic;
  line-height: 1.55;
  text-align: center;
}

/* ---------- Interactive probability lab ---------- */

.ai-probability-lab {
  overflow: hidden;
  border: 1px solid rgba(247, 242, 233, 0.13);
  border-radius: 1.3rem;
  background: var(--ai-forest);
  color: var(--ai-paper);
  box-shadow: 0 30px 70px rgba(23, 35, 27, 0.16);
}

.ai-probability-lab [hidden] {
  display: none !important;
}

.ai-probability-lab__header {
  display: grid;
  padding: clamp(2rem, 4vw, 3.2rem);
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 2rem;
  background:
    radial-gradient(circle at 94% 0%, rgba(217, 249, 157, 0.08), transparent 30%),
    var(--ai-forest);
}

.ai-probability-lab__header h3 {
  max-width: 47rem;
  margin: 0.8rem 0 1rem;
  font-size: clamp(2.2rem, 4.2vw, 4.25rem);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 0.98;
}

.ai-probability-lab__header p:not(.ai-eyebrow) {
  max-width: 48rem;
  margin: 0;
  color: rgba(247, 242, 233, 0.58);
  font-size: 0.95rem;
  line-height: 1.65;
}

.ai-probability-lab__header p strong {
  color: var(--ai-paper);
}

.ai-probability-lab__disclaimer {
  display: inline-flex;
  padding: 0.6rem 0.75rem;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid rgba(247, 242, 233, 0.14);
  border-radius: 999px;
  color: rgba(247, 242, 233, 0.48);
  font-family: var(--ai-mono);
  font-size: 0.5rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
  text-transform: uppercase;
}

.ai-probability-lab__disclaimer i {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--ai-coral);
}

.ai-probability-modes {
  display: grid;
  padding: 0 1rem 1rem;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  background: var(--ai-forest);
}

.ai-probability-modes button {
  position: relative;
  display: grid;
  min-height: 5.2rem;
  padding: 0.9rem 1rem 0.9rem 3.7rem;
  align-content: center;
  border: 1px solid rgba(247, 242, 233, 0.13);
  border-radius: 0.72rem;
  background: rgba(247, 242, 233, 0.045);
  color: rgba(247, 242, 233, 0.72);
  text-align: left;
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease, color 180ms ease;
}

.ai-probability-modes button:hover {
  border-color: rgba(217, 249, 157, 0.38);
}

.ai-probability-modes button.is-active {
  border-color: var(--ai-lime);
  background: var(--ai-lime);
  color: var(--ai-ink);
}

.ai-probability-modes button > span {
  position: absolute;
  top: 50%;
  left: 1rem;
  display: grid;
  width: 1.9rem;
  height: 1.9rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--ai-mono);
  font-size: 0.48rem;
  opacity: 0.55;
  transform: translateY(-50%);
}

.ai-probability-modes strong,
.ai-probability-modes small {
  display: block;
}

.ai-probability-modes strong {
  font-size: 0.82rem;
}

.ai-probability-modes small {
  margin-top: 0.15rem;
  font-family: var(--ai-mono);
  font-size: 0.48rem;
  letter-spacing: 0.05em;
  opacity: 0.52;
  text-transform: uppercase;
}

.ai-probability-lab__body {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(25rem, 1.05fr);
  border-top: 1px solid rgba(247, 242, 233, 0.1);
}

.ai-probability-experiment {
  min-height: 35rem;
  padding: clamp(1.6rem, 3.5vw, 2.8rem);
  background: var(--ai-paper);
  color: var(--ai-ink);
}

.ai-probability-experiment__label {
  display: flex;
  margin-bottom: 1rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: #727b74;
  font-family: var(--ai-mono);
  font-size: 0.52rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.ai-probability-experiment__label strong {
  padding: 0.4rem 0.52rem;
  border-radius: 999px;
  background: var(--ai-lime);
  color: var(--ai-ink);
  font-size: 0.48rem;
}

.ai-probability-prompt {
  display: flex;
  min-height: 7rem;
  padding: 1.3rem;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45em;
  border: 1px solid var(--ai-line);
  border-radius: 0.8rem;
  background: var(--ai-white);
  font-family: var(--ai-mono);
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  letter-spacing: -0.045em;
}

.ai-probability-prompt mark {
  padding: 0.12em 0.22em;
  border-radius: 0.25rem;
  background: var(--ai-lime);
  color: var(--ai-ink);
  font-weight: 700;
  transition: background 180ms ease;
}

.ai-probability-description {
  min-height: 4.8rem;
  margin: 1.15rem 0 0;
  color: var(--ai-ink-soft);
  font-size: 0.86rem;
  line-height: 1.62;
}

.ai-skill-context {
  display: grid;
  margin-top: 1.2rem;
  padding: 1rem;
  gap: 0.55rem;
  border: 1px solid rgba(117, 94, 202, 0.22);
  border-left: 3px solid #8f78dc;
  border-radius: 0.2rem 0.65rem 0.65rem 0.2rem;
  background: rgba(201, 188, 246, 0.22);
}

.ai-skill-context > span {
  color: #6554a2;
  font-family: var(--ai-mono);
  font-size: 0.51rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.ai-skill-context code {
  color: var(--ai-ink);
  font-family: var(--ai-mono);
  font-size: 0.68rem;
  line-height: 1.55;
}

.ai-skill-context small {
  color: var(--ai-ink-soft);
  font-size: 0.7rem;
  line-height: 1.5;
}

.ai-bias-controls {
  margin-top: 1.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--ai-line);
}

.ai-bias-controls__heading {
  display: flex;
  margin-bottom: 1.15rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.ai-bias-controls__heading span,
.ai-bias-controls__heading small {
  display: block;
}

.ai-bias-controls__heading span {
  font-family: var(--ai-mono);
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.ai-bias-controls__heading small {
  margin-top: 0.25rem;
  color: #7a837c;
  font-size: 0.68rem;
}

.ai-bias-controls__heading button,
.ai-bias-presets button {
  border: 1px solid var(--ai-line);
  background: transparent;
  color: var(--ai-ink);
  cursor: pointer;
}

.ai-bias-controls__heading button {
  padding: 0.42rem 0.6rem;
  border-radius: 999px;
  font-family: var(--ai-mono);
  font-size: 0.48rem;
  text-transform: uppercase;
}

.ai-bias-slider {
  display: grid;
  min-height: 2.65rem;
  grid-template-columns: 5.5rem 1fr 3rem;
  align-items: center;
  gap: 0.8rem;
}

.ai-bias-slider label {
  font-family: var(--ai-mono);
  font-size: 0.58rem;
  font-weight: 600;
}

.ai-bias-slider input[type="range"] {
  width: 100%;
  height: 0.35rem;
  margin: 0;
  border-radius: 999px;
  outline: none;
  background:
    linear-gradient(to right, var(--ai-green) 0 var(--range-fill, 50%), rgba(23, 35, 27, 0.1) var(--range-fill, 50%) 100%);
  appearance: none;
  -webkit-appearance: none;
}

.ai-bias-slider input[type="range"]::-webkit-slider-thumb {
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--ai-paper);
  border-radius: 50%;
  background: var(--ai-ink);
  box-shadow: 0 0 0 1px var(--ai-ink);
  cursor: grab;
  appearance: none;
  -webkit-appearance: none;
}

.ai-bias-slider input[type="range"]::-moz-range-thumb {
  width: 0.85rem;
  height: 0.85rem;
  border: 2px solid var(--ai-paper);
  border-radius: 50%;
  background: var(--ai-ink);
  box-shadow: 0 0 0 1px var(--ai-ink);
  cursor: grab;
}

.ai-bias-slider input[type="range"]:focus-visible {
  outline: 3px solid var(--ai-coral);
  outline-offset: 5px;
}

.ai-bias-slider output {
  color: var(--ai-ink);
  font-family: var(--ai-mono);
  font-size: 0.61rem;
  font-weight: 600;
  text-align: right;
}

.ai-bias-presets {
  display: flex;
  margin-top: 0.8rem;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.ai-bias-presets button {
  padding: 0.48rem 0.6rem;
  border-radius: 0.42rem;
  font-family: var(--ai-mono);
  font-size: 0.49rem;
  transition: border-color 160ms ease, background 160ms ease;
}

.ai-bias-presets button:hover {
  border-color: var(--ai-ink);
  background: var(--ai-white);
}

.ai-probability-chart {
  display: flex;
  min-height: 35rem;
  padding: clamp(1.6rem, 3.5vw, 2.8rem);
  flex-direction: column;
  justify-content: center;
  border-left: 1px solid rgba(247, 242, 233, 0.1);
  background:
    radial-gradient(circle at 95% 8%, rgba(201, 188, 246, 0.09), transparent 35%),
    #101812;
}

.ai-probability-chart__header {
  display: flex;
  margin-bottom: 2rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: rgba(247, 242, 233, 0.55);
  font-family: var(--ai-mono);
  font-size: 0.56rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-probability-chart__header small {
  color: var(--ai-coral);
  font-size: 0.47rem;
}

.ai-probability-row {
  display: grid;
  min-height: 4.2rem;
  grid-template-columns: 5.2rem 1fr 3.8rem;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid rgba(247, 242, 233, 0.08);
}

.ai-probability-row__token strong,
.ai-probability-row__token small {
  display: block;
}

.ai-probability-row__token strong {
  color: rgba(247, 242, 233, 0.66);
  font-family: var(--ai-mono);
  font-size: 0.73rem;
  font-weight: 600;
  transition: color 180ms ease;
}

.ai-probability-row__token small {
  margin-top: 0.18rem;
  color: rgba(247, 242, 233, 0.3);
  font-family: var(--ai-mono);
  font-size: 0.48rem;
}

.ai-probability-row__track {
  height: 0.75rem;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(247, 242, 233, 0.08);
}

.ai-probability-row__track i {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: rgba(247, 242, 233, 0.28);
  transition: width 320ms cubic-bezier(0.2, 0.72, 0.18, 1), background 180ms ease;
}

.ai-probability-row output {
  color: rgba(247, 242, 233, 0.6);
  font-family: var(--ai-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-align: right;
  transition: color 180ms ease;
}

.ai-probability-row.is-winner .ai-probability-row__token strong,
.ai-probability-row.is-winner output {
  color: var(--ai-lime);
}

.ai-probability-row.is-winner .ai-probability-row__track i {
  background: var(--ai-lime);
}

.ai-probability-chart__legend {
  display: flex;
  margin-top: 1.7rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: rgba(247, 242, 233, 0.32);
  font-family: var(--ai-mono);
  font-size: 0.48rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.ai-probability-chart__legend span:first-child {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.ai-probability-chart__legend i {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--ai-lime);
}

.ai-probability-lab__footer {
  display: grid;
  padding: 1.2rem clamp(1.6rem, 3.5vw, 2.8rem);
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: clamp(2rem, 6vw, 6rem);
  border-top: 1px solid rgba(247, 242, 233, 0.1);
  background: var(--ai-forest-2);
}

.ai-probability-formula {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: rgba(247, 242, 233, 0.45);
  font-family: var(--ai-mono);
  font-size: 0.48rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
  text-transform: uppercase;
}

.ai-probability-formula span,
.ai-probability-formula strong {
  padding: 0.4rem 0.48rem;
  border: 1px solid rgba(247, 242, 233, 0.12);
  border-radius: 0.35rem;
}

.ai-probability-formula strong {
  border-color: rgba(217, 249, 157, 0.4);
  color: var(--ai-lime);
}

.ai-probability-formula i {
  font-style: normal;
}

.ai-probability-lab__footer > p {
  margin: 0;
  color: rgba(247, 242, 233, 0.58);
  font-family: var(--ai-serif);
  font-size: 0.87rem;
  font-style: italic;
  line-height: 1.5;
  text-align: right;
}

.ai-correction {
  display: grid;
  margin-top: 1rem;
  padding: 1.7rem 2rem;
  grid-template-columns: 11rem 1fr;
  gap: 2rem;
  border: 1px solid var(--ai-line);
  border-radius: 0.8rem;
  background: var(--ai-sun);
}

.ai-correction__label {
  align-self: start;
  font-family: var(--ai-mono);
  font-size: 0.59rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-correction h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.ai-correction p {
  margin: 0;
  color: rgba(23, 35, 27, 0.72);
  font-size: 0.87rem;
  line-height: 1.6;
}

/* ---------- Choice table ---------- */

.ai-choice-table {
  overflow: hidden;
  border: 1px solid var(--ai-line);
  border-radius: 1rem;
}

.ai-choice-table__row {
  display: grid;
  min-height: 5.2rem;
  padding: 1rem 1.2rem;
  grid-template-columns: 1.05fr 0.8fr 1.3fr 0.8fr;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid var(--ai-line);
  background: rgba(255, 253, 248, 0.48);
}

.ai-choice-table__row:last-child {
  border-bottom: 0;
}

.ai-choice-table__head {
  min-height: 3.2rem;
  background: var(--ai-cream);
  color: #737c75;
  font-family: var(--ai-mono);
  font-size: 0.52rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.ai-choice-table__row > strong {
  font-size: 0.88rem;
}

.ai-choice-table__row > span {
  color: var(--ai-ink-soft);
  font-size: 0.78rem;
  line-height: 1.45;
}

.ai-pill {
  display: inline-block;
  padding: 0.45rem 0.58rem;
  border-radius: 999px;
  color: var(--ai-ink);
  font-family: var(--ai-mono);
  font-size: 0.49rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.ai-pill--lime { background: var(--ai-lime); }
.ai-pill--sky { background: var(--ai-sky); }
.ai-pill--peach { background: var(--ai-peach); }
.ai-pill--lilac { background: var(--ai-lilac); }

.ai-decision-grid {
  display: grid;
  margin-top: 1rem;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.ai-decision-grid article {
  min-height: 15rem;
  padding: 1.7rem;
  border: 1px solid var(--ai-line);
  border-radius: 0.9rem;
}

.ai-decision-grid span {
  color: var(--ai-coral);
  font-family: var(--ai-mono);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-decision-grid h3 {
  margin: 3.2rem 0 0.7rem;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.1;
}

.ai-decision-grid p {
  margin: 0;
  color: var(--ai-ink-soft);
  font-size: 0.82rem;
  line-height: 1.55;
}

/* ---------- Takeaway ---------- */

.ai-section--takeaway {
  overflow: hidden;
  background: var(--ai-lime);
}

.ai-section--takeaway::before {
  position: absolute;
  top: -20rem;
  right: -15rem;
  width: 48rem;
  height: 48rem;
  border: 1px solid rgba(23, 35, 27, 0.12);
  border-radius: 50%;
  content: "";
}

.ai-takeaway {
  position: relative;
  z-index: 1;
  max-width: 64rem;
  margin-inline: auto;
  text-align: center;
}

.ai-takeaway__mark {
  display: grid;
  width: 4rem;
  height: 4rem;
  margin: 0 auto 2rem;
  place-items: center;
  border: 2px solid var(--ai-ink);
  border-radius: 50%;
}

.ai-takeaway__mark span {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  background: var(--ai-coral);
}

.ai-takeaway h2 {
  margin: 0.9rem 0 1.4rem;
  font-size: clamp(2.8rem, 5.6vw, 5.7rem);
  font-weight: 700;
  letter-spacing: -0.068em;
  line-height: 0.98;
}

.ai-takeaway h2 em {
  font-family: var(--ai-serif);
  font-weight: 600;
}

.ai-takeaway > p:not(.ai-eyebrow) {
  max-width: 47rem;
  margin: 0 auto;
  color: rgba(23, 35, 27, 0.7);
  font-size: clamp(1rem, 1.4vw, 1.18rem);
  line-height: 1.6;
}

.ai-takeaway__actions {
  display: flex;
  margin-top: 2.4rem;
  justify-content: center;
  gap: 0.7rem;
}

.ai-button {
  display: inline-flex;
  min-height: 3.3rem;
  padding: 0.8rem 1.25rem;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  border: 1px solid var(--ai-ink);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.ai-button:hover {
  transform: translateY(-2px);
}

.ai-button--primary {
  background: var(--ai-ink);
  color: var(--ai-paper) !important;
}

.ai-button--primary:hover {
  box-shadow: 0 10px 24px rgba(23, 35, 27, 0.22);
}

.ai-button--ghost {
  background: transparent;
}

.ai-button svg {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.ai-sources {
  display: grid;
  max-width: 55rem;
  margin: clamp(5rem, 9vw, 8rem) auto 0;
  padding-top: 1.4rem;
  grid-template-columns: 10rem 1fr;
  gap: 2rem;
  border-top: 1px solid rgba(23, 35, 27, 0.18);
  text-align: left;
}

.ai-sources ol {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 0.65rem;
  list-style: none;
}

.ai-sources li {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.6rem;
  color: rgba(23, 35, 27, 0.65);
  font-family: var(--ai-mono);
  font-size: 0.61rem;
  line-height: 1.5;
}

.ai-sources li span {
  color: var(--ai-coral);
}

.ai-sources a {
  text-decoration-color: rgba(23, 35, 27, 0.25);
  text-underline-offset: 0.2em;
}

/* ---------- Footer ---------- */

.ai-footer {
  padding: 2.6rem 0;
  border-top: 1px solid rgba(247, 242, 233, 0.11);
  background: var(--ai-forest);
  color: var(--ai-paper);
}

.ai-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.ai-brand--footer {
  flex: 0 0 auto;
}

.ai-footer p {
  margin: 0;
  color: rgba(247, 242, 233, 0.42);
  font-family: var(--ai-serif);
  font-size: 0.85rem;
  font-style: italic;
}

.ai-footer__top {
  color: rgba(247, 242, 233, 0.62) !important;
  font-family: var(--ai-mono);
  font-size: 0.57rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
}

.ai-footer__top span {
  margin-left: 0.25rem;
  color: var(--ai-lime);
}

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .ai-nav__links {
    display: none;
  }

  .ai-nav__read-time {
    margin-left: auto;
  }

  .ai-hero__inner {
    grid-template-columns: 1fr;
  }

  .ai-hero__copy {
    max-width: 48rem;
  }

  .ai-hero-stack {
    width: min(100%, 39rem);
    justify-self: end;
  }

  .ai-section-heading--split {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 1.5rem;
  }

  .ai-section-heading--split > p {
    max-width: 43rem;
  }

  .ai-definition-grid {
    grid-template-columns: 1fr;
  }

  .ai-definition-card {
    min-height: 0;
  }

  .ai-definition-card--featured {
    transform: none;
  }

  .ai-definition-card__lock {
    margin: 2rem 0 1.5rem;
  }

  .ai-definition-card > p {
    min-height: 0;
  }

  .ai-skill-anatomy {
    grid-template-columns: 1fr;
  }

  .ai-skill-folder {
    width: min(100%, 43rem);
  }

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

  .ai-runtime-flow > i {
    display: none;
  }

  .ai-control__layout {
    grid-template-columns: 1fr;
  }

  .ai-control-stack {
    width: min(100%, 36rem);
    margin-inline: auto;
  }

  .ai-probability-lab__header {
    grid-template-columns: 1fr;
  }

  .ai-probability-lab__disclaimer {
    justify-self: start;
  }

  .ai-probability-lab__body {
    grid-template-columns: 1fr;
  }

  .ai-probability-experiment,
  .ai-probability-chart {
    min-height: 0;
  }

  .ai-probability-chart {
    border-top: 1px solid rgba(247, 242, 233, 0.1);
    border-left: 0;
  }

  .ai-probability-lab__footer {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .ai-probability-lab__footer > p {
    text-align: left;
  }

  .ai-choice-table__row {
    grid-template-columns: 1fr 0.8fr 1fr;
  }

  .ai-choice-table__row > :last-child {
    display: none;
  }
}

@media (max-width: 720px) {
  .ai-shell,
  .ai-reading {
    width: min(calc(100% - 2rem), 78rem);
  }

  .ai-nav__inner {
    min-height: 3.85rem;
  }

  .ai-brand__name {
    font-size: 0.84rem;
  }

  .ai-nav__divider,
  .ai-nav__series {
    display: none;
  }

  .ai-nav__read-time {
    padding: 0;
    border: 0;
  }

  .ai-hero {
    min-height: auto;
    padding: 7.2rem 0 5rem;
  }

  .ai-hero__inner {
    gap: 4rem;
  }

  .ai-hero__copy h1 {
    font-size: clamp(3.7rem, 18vw, 5.4rem);
  }

  .ai-hero__dek {
    font-size: 1.05rem;
  }

  .ai-hero__meta span:last-child {
    display: none;
  }

  .ai-hero-stack {
    padding: 0.8rem;
  }

  .ai-hero-stack__layer {
    min-height: 4.8rem;
    padding: 0.8rem;
  }

  .ai-hero-stack__layer strong {
    font-size: 0.76rem;
  }

  .ai-layer-status {
    display: none;
  }

  .ai-scroll-cue {
    display: none;
  }

  .ai-section {
    padding: 5rem 0;
  }

  .ai-section-heading {
    margin-bottom: 2.8rem;
  }

  .ai-section-heading h2,
  .ai-display-quote {
    font-size: clamp(2.55rem, 12vw, 3.7rem);
  }

  .ai-prose--lead {
    grid-template-columns: 1fr;
    gap: 1.4rem;
  }

  .ai-thesis-grid {
    grid-template-columns: 1fr;
  }

  .ai-thesis-card {
    min-height: 25rem;
    padding: 1.7rem;
  }

  .ai-thesis-card__icon {
    margin-bottom: 3.2rem;
  }

  .ai-margin-note {
    grid-template-columns: 1fr;
  }

  .ai-margin-note__mark {
    justify-self: start;
  }

  .ai-definition-card {
    padding: 1.5rem;
  }

  .ai-file-row {
    grid-template-columns: auto 1fr;
  }

  .ai-file-badge {
    display: none;
  }

  .ai-skill-property {
    grid-template-columns: 1fr;
    gap: 0.45rem;
  }

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

  .ai-runtime-flow article {
    min-height: 11rem;
  }

  .ai-boundary-callout {
    grid-template-columns: 1fr;
  }

  .ai-control__layout {
    gap: 2.2rem;
  }

  .ai-control-stack {
    padding: 0.75rem;
  }

  .ai-control-stack__training {
    grid-template-columns: auto 1fr;
  }

  .ai-control-stack__research {
    display: none;
  }

  .ai-control-panel__content {
    min-height: 31rem;
    padding: 1.7rem;
  }

  .ai-control-panel__facts {
    grid-template-columns: 1fr;
  }

  .ai-control-panel__terminal-bar small {
    display: none;
  }

  .ai-probability-lab__header {
    padding: 1.5rem;
  }

  .ai-probability-lab__header h3 {
    font-size: clamp(2rem, 10vw, 2.8rem);
  }

  .ai-probability-modes {
    padding: 0 0.65rem 0.65rem;
    gap: 0.35rem;
  }

  .ai-probability-modes button {
    display: block;
    min-height: 4.7rem;
    padding: 0.6rem 0.3rem;
    text-align: center;
  }

  .ai-probability-modes button > span {
    position: static;
    display: inline-grid;
    width: 1.5rem;
    height: 1.5rem;
    margin: 0 auto 0.35rem;
    font-size: 0.4rem;
    transform: none;
  }

  .ai-probability-modes strong {
    font-size: 0.64rem;
  }

  .ai-probability-modes small {
    display: none;
  }

  .ai-probability-experiment,
  .ai-probability-chart {
    padding: 1rem;
  }

  .ai-probability-prompt {
    min-height: 5.5rem;
    padding: 1rem;
    font-size: 1.2rem;
  }

  .ai-probability-description {
    min-height: 0;
  }

  .ai-bias-slider {
    grid-template-columns: 4.8rem 1fr 2.8rem;
    gap: 0.5rem;
  }

  .ai-bias-presets button {
    flex: 1 1 7rem;
  }

  .ai-probability-chart__header {
    margin-bottom: 1.2rem;
  }

  .ai-probability-row {
    min-height: 3.9rem;
    grid-template-columns: 3.7rem 1fr 3.2rem;
    gap: 0.55rem;
  }

  .ai-probability-row__token small {
    font-size: 0.42rem;
  }

  .ai-probability-row output {
    font-size: 0.61rem;
  }

  .ai-probability-chart__legend span:last-child {
    display: none;
  }

  .ai-probability-lab__footer {
    padding: 1rem;
  }

  .ai-probability-formula {
    flex-wrap: wrap;
    white-space: normal;
  }

  .ai-correction {
    grid-template-columns: 1fr;
    gap: 0.8rem;
    padding: 1.5rem;
  }

  .ai-choice-table {
    overflow: visible;
    border: 0;
  }

  .ai-choice-table__head {
    display: none;
  }

  .ai-choice-table__row {
    min-height: 0;
    margin-bottom: 0.7rem;
    padding: 1.2rem;
    grid-template-columns: 1fr;
    gap: 0.7rem;
    border: 1px solid var(--ai-line);
    border-radius: 0.75rem;
  }

  .ai-choice-table__row > :last-child {
    display: block;
  }

  .ai-choice-table__row > span:last-child::before {
    color: #858c86;
    content: "Access: ";
    font-family: var(--ai-mono);
    font-size: 0.5rem;
    text-transform: uppercase;
  }

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

  .ai-decision-grid article {
    min-height: 13rem;
  }

  .ai-takeaway h2 {
    font-size: clamp(2.65rem, 12vw, 4rem);
  }

  .ai-takeaway__actions {
    flex-direction: column;
  }

  .ai-sources {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .ai-footer__inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .ai-footer p {
    display: none;
  }
}

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

  .ai-scroll-cue svg,
  .ai-control-layer.is-active .ai-control-layer__pulse {
    animation: none;
  }

  .ai-brand__mark,
  .ai-button,
  .ai-control-layer,
  .ai-probability-row__track i {
    transition: none;
  }
}

@media print {
  .ai-nav,
  .ai-scroll-cue,
  .ai-takeaway__actions,
  .ai-footer {
    display: none;
  }

  .ai-hero {
    min-height: 0;
    padding-top: 4rem;
  }

  .ai-section {
    break-inside: avoid;
    padding: 3rem 0;
  }
}