.article-body {
  background:
    radial-gradient(circle at 90% 2%, rgba(24, 91, 216, 0.07), transparent 31rem),
    var(--color-bg);
}

.reading-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  height: 3px;
  background: transparent;
  pointer-events: none;
}

.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--color-signal);
  transform: scaleX(0);
  transform-origin: left;
  will-change: transform;
}

.article-header .site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.article-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(19rem, 0.7fr);
  gap: clamp(3rem, 8vw, 9rem);
  align-items: end;
  min-height: min(56rem, calc(100svh - 4.75rem));
  padding: clamp(5.5rem, 10vw, 10rem) var(--page-pad) clamp(4rem, 8vw, 7rem);
  border-bottom: 1px solid var(--color-line-strong);
}

.article-hero-copy {
  max-width: 69rem;
}

.article-kicker,
.section-label {
  margin: 0;
  color: var(--color-success);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.055em;
  line-height: 1.4;
  text-transform: uppercase;
}

.article-hero h1 {
  max-width: 12ch;
  margin: 1.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(4rem, 8vw, 6rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 0.9;
  text-wrap: balance;
}

.article-hero h1 em {
  color: var(--color-accent-deep);
  font-weight: inherit;
}

.article-deck {
  max-width: 48rem;
  margin: 2rem 0 0;
  color: var(--color-muted);
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.1vw, 2rem);
  line-height: 1.35;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 2.25rem;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 1.25rem;
}

.article-meta span:not(:last-child)::after {
  width: 0.28rem;
  height: 0.28rem;
  border-radius: 50%;
  background: var(--color-signal);
  content: "";
}

.prompt-specimen {
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.5rem);
  border: 1px solid var(--color-line-strong);
  background: var(--color-surface);
  box-shadow: 1rem 1rem 0 rgba(24, 91, 216, 0.11);
}

.prompt-specimen::before {
  position: absolute;
  top: -0.55rem;
  right: 2rem;
  width: 4.8rem;
  height: 1.05rem;
  background: var(--color-signal);
  content: "";
  transform: rotate(2deg);
}

.specimen-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-line-strong);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.prompt-specimen dl {
  margin: 0;
}

.prompt-specimen dl > div {
  display: grid;
  grid-template-columns: 5rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-line);
}

.prompt-specimen dt {
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.prompt-specimen dd {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.25;
}

.prompt-specimen > p {
  margin: 1.5rem 0 0;
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.article-thesis {
  padding: clamp(2.25rem, 4vw, 4rem) var(--page-pad);
  background: var(--color-ink);
  color: var(--color-surface-strong);
}

.article-thesis p {
  max-width: 68rem;
  margin: 0 auto;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 2.4vw, 2.25rem);
  line-height: 1.35;
}

.article-thesis strong {
  color: #83d7bd;
  font-family: var(--font-body);
  font-size: 0.9em;
}

.article-shell {
  display: grid;
  grid-template-columns: minmax(11rem, 16rem) minmax(0, 50rem);
  gap: clamp(3rem, 7vw, 8rem);
  justify-content: center;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: clamp(5rem, 10vw, 9rem) var(--page-pad);
}

.article-toc {
  position: sticky;
  top: 7rem;
  align-self: start;
  padding-top: 0.15rem;
}

.article-toc > p {
  margin: 0 0 1rem;
  color: var(--color-quiet);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.article-toc ol {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-line-strong);
  list-style: none;
}

.article-toc a {
  display: block;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: var(--text-sm);
  font-weight: 650;
  line-height: 1.35;
  transition:
    color var(--duration-fast) ease,
    padding-left var(--duration-fast) var(--ease-out);
}

.article-toc a:hover,
.article-toc a:focus-visible,
.article-toc a[aria-current="true"] {
  padding-left: 0.45rem;
  color: var(--color-accent-deep);
}

.article-content {
  min-width: 0;
}

.article-content section {
  scroll-margin-top: 7rem;
}

.article-content section + section {
  margin-top: clamp(6rem, 12vw, 10rem);
  padding-top: clamp(4rem, 7vw, 6rem);
  border-top: 1px solid var(--color-line-strong);
}

.article-content h2 {
  max-width: 15ch;
  margin: 1.25rem 0 2rem;
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 5.5vw, 4.9rem);
  font-weight: 500;
  hyphens: auto;
  letter-spacing: -0.04em;
  line-height: 0.98;
  overflow-wrap: break-word;
  text-wrap: balance;
}

.article-content h3 {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.2vw, 2.8rem);
  font-weight: 550;
  hyphens: auto;
  letter-spacing: -0.025em;
  line-height: 1.06;
  overflow-wrap: break-word;
  text-wrap: balance;
}

.article-content p,
.article-content li {
  max-width: 70ch;
  color: var(--color-muted);
  font-size: 1.08rem;
  line-height: 1.76;
}

.article-content p {
  margin: 0 0 1.45rem;
}

.article-content .lead {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  line-height: 1.55;
}

.article-content a:not(.button) {
  color: var(--color-accent-deep);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: rgba(13, 62, 159, 0.32);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

.article-content a:not(.button):hover {
  text-decoration-color: currentColor;
}

.article-content code {
  padding: 0.1em 0.3em;
  background: rgba(24, 91, 216, 0.08);
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.term-tooltip {
  --tooltip-shift: 0px;
  position: relative;
  display: inline-block;
}

.term-tooltip__trigger {
  appearance: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-accent-deep);
  cursor: help;
  font: inherit;
  font-weight: 700;
  line-height: inherit;
  text-align: inherit;
  text-decoration: underline dotted;
  text-decoration-color: rgba(13, 62, 159, 0.55);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
  touch-action: manipulation;
}

.term-tooltip__trigger:hover {
  text-decoration-style: solid;
  text-decoration-color: currentColor;
}

.term-tooltip__content {
  position: absolute;
  inset-block-end: calc(100% + var(--space-2));
  inset-inline-start: 50%;
  z-index: 20;
  width: max-content;
  max-width: min(19rem, calc(100vw - 2.25rem));
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-sm);
  background: var(--color-surface-strong);
  box-shadow: var(--shadow-md);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: normal;
  line-height: 1.45;
  opacity: 0;
  pointer-events: none;
  text-align: left;
  text-transform: none;
  transform: translate(calc(-50% + var(--tooltip-shift)), var(--space-1));
  transition:
    opacity var(--duration-fast) ease,
    transform var(--duration-fast) var(--ease-out),
    visibility 0s linear var(--duration-fast);
  visibility: hidden;
}

.term-tooltip__content::after {
  position: absolute;
  top: calc(100% - 0.32rem);
  left: calc(50% - var(--tooltip-shift));
  width: 0.65rem;
  height: 0.65rem;
  border-right: 1px solid var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
  background: var(--color-surface-strong);
  content: "";
  transform: translateX(-50%) rotate(45deg);
}

.term-tooltip:not(.is-dismissed):hover .term-tooltip__content,
.term-tooltip.is-open .term-tooltip__content {
  opacity: 1;
  transform: translate(calc(-50% + var(--tooltip-shift)), 0);
  transition-delay: 0s;
  visibility: visible;
}

.margin-note {
  margin: 3rem 0 0;
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-signal);
  border-bottom: 1px solid var(--color-line-strong);
}

.margin-note span,
.evidence-strip span,
.security-note span {
  color: var(--color-signal);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.margin-note p {
  margin: 0.65rem 0 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 1.35rem;
  line-height: 1.45;
}

.principle {
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
  padding-top: clamp(4rem, 8vw, 7rem);
}

.principle + .principle {
  margin-top: clamp(3rem, 7vw, 6rem);
  border-top: 1px solid var(--color-line);
}

.principle-number {
  display: grid;
  place-items: center;
  align-self: start;
  width: 2.6rem;
  aspect-ratio: 1;
  background: var(--color-ink);
  color: var(--color-surface-strong);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 750;
}

.before-after {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  margin: 2.25rem 0;
  border: 1px solid var(--color-line-strong);
}

.before-after > div {
  padding: 1.5rem;
  background: rgba(255, 253, 247, 0.55);
}

.before-after > div + div {
  border-left: 1px solid var(--color-line-strong);
  background: var(--color-surface);
}

.before-after span {
  color: var(--color-quiet);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 750;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.before-after > div:last-child span {
  color: var(--color-success);
}

.before-after p {
  margin: 0.75rem 0 0;
  color: var(--color-ink);
  font-size: 0.96rem;
  line-height: 1.58;
}

.evidence-strip {
  display: grid;
  grid-template-columns: 7rem 1fr;
  gap: 1.5rem;
  align-items: baseline;
  margin: 2.25rem 0;
  padding: 1.35rem 0;
  border-top: 1px solid var(--color-line-strong);
  border-bottom: 1px solid var(--color-line-strong);
}

.evidence-strip p {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 1.22rem;
  line-height: 1.45;
}

.workflow-sequence {
  margin: 2.25rem 0;
  padding: 0;
  border-top: 1px solid var(--color-line-strong);
  list-style: none;
}

.workflow-sequence li {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: 1.5rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--color-line);
}

.workflow-sequence span {
  color: var(--color-accent-deep);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.workflow-sequence p {
  margin: 0;
  color: var(--color-ink);
  font-size: 1rem;
  line-height: 1.5;
}

.security-note {
  margin: 2.5rem 0;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background: var(--color-ink);
  color: var(--color-surface-strong);
}

.security-note span {
  color: #f2b54b;
}

.security-note p {
  margin: 0.85rem 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.98rem;
  line-height: 1.67;
}

.security-note a {
  color: #ffffff !important;
  text-decoration-color: rgba(255, 255, 255, 0.45) !important;
}

.prompt-template {
  margin: 3rem 0;
  border: 1px solid var(--color-line-strong);
  background: var(--color-ink);
  box-shadow: 1rem 1rem 0 rgba(217, 76, 53, 0.12);
}

.prompt-template-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem 0.9rem 1.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.62);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.prompt-template button {
  min-height: 2.75rem;
  padding: 0 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-surface-strong);
  cursor: pointer;
  font: inherit;
  transition:
    background var(--duration-fast) ease,
    color var(--duration-fast) ease;
}

.prompt-template button:hover,
.prompt-template button[data-copied="true"] {
  background: var(--color-surface-strong);
  color: var(--color-ink);
}

.prompt-template pre {
  max-width: 100%;
  margin: 0;
  overflow-x: auto;
  padding: clamp(1.4rem, 4vw, 2.4rem);
  white-space: pre-wrap;
}

.prompt-template pre code {
  padding: 0;
  background: none;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.86rem;
  line-height: 1.75;
}

.copy-status {
  min-height: 1.3rem;
  margin: 0 !important;
  padding: 0 1.4rem 1rem;
  color: #83d7bd !important;
  font-family: var(--font-mono);
  font-size: 0.7rem !important;
}

.article-content blockquote {
  margin: 3rem 0;
  padding: 2rem 0;
  border-top: 1px solid var(--color-accent);
  border-bottom: 1px solid var(--color-line-strong);
}

.article-content blockquote p {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  line-height: 1.32;
}

.final-checklist {
  margin: 3rem 0;
  padding: 0;
  border-top: 1px solid var(--color-line-strong);
  list-style: none;
}

.final-checklist li {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  gap: 1.5rem;
  align-items: baseline;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-line);
}

.final-checklist span {
  color: var(--color-signal);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 750;
}

.final-checklist p {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1.4;
}

.article-close {
  color: var(--color-ink) !important;
  font-family: var(--font-display);
  font-size: 1.45rem !important;
  line-height: 1.55 !important;
}

.sources-section h2 {
  max-width: 18ch;
}

.sources-list {
  margin: 2.5rem 0 0;
  padding: 0;
  border-top: 1px solid var(--color-line-strong);
  list-style: none;
}

.sources-list li {
  display: grid;
  grid-template-columns: minmax(14rem, 0.8fr) minmax(0, 1.2fr);
  gap: 2rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--color-line);
}

.sources-list a {
  align-self: start;
  line-height: 1.45;
}

.sources-list span {
  color: var(--color-quiet);
  font-size: 0.88rem;
  line-height: 1.55;
}

.article-cta {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(18rem, 0.8fr);
  gap: clamp(3rem, 8vw, 9rem);
  align-items: end;
  padding: clamp(5rem, 10vw, 9rem) var(--page-pad);
  border-top: 0.65rem solid var(--color-signal);
  background: var(--color-surface);
}

.article-cta h2 {
  max-width: 14ch;
  margin: 1rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 5.5vw, 5.25rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 0.95;
}

.article-cta > div:last-child {
  max-width: 31rem;
}

.article-cta > div:last-child p {
  margin: 0 0 2rem;
  color: var(--color-muted);
  font-size: 1.08rem;
}

@media (max-width: 70rem) {
  .article-hero {
    grid-template-columns: minmax(0, 1fr);
    min-height: auto;
  }

  .prompt-specimen {
    width: min(100%, 38rem);
  }

  .article-shell {
    grid-template-columns: minmax(0, 50rem);
  }

  .article-toc {
    position: static;
    display: none;
  }
}

@media (max-width: 48rem) {
  .article-hero,
  .article-shell,
  .article-cta {
    padding-right: 1.125rem;
    padding-left: 1.125rem;
  }

  .article-hero {
    gap: 3rem;
    padding-top: 4.5rem;
  }

  .article-hero h1 {
    font-size: clamp(3.65rem, 17vw, 5.3rem);
  }

  .article-meta {
    display: grid;
    gap: 0.35rem;
  }

  .article-meta span::after {
    display: none;
  }

  .article-thesis {
    padding-right: 1.125rem;
    padding-left: 1.125rem;
  }

  .article-shell {
    padding-top: 4.5rem;
    padding-bottom: 5rem;
  }

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

  .before-after,
  .article-cta {
    grid-template-columns: 1fr;
  }

  .before-after > div + div {
    border-top: 1px solid var(--color-line-strong);
    border-left: 0;
  }

  .evidence-strip,
  .workflow-sequence li,
  .sources-list li {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .prompt-template {
    box-shadow: 0.55rem 0.55rem 0 rgba(217, 76, 53, 0.12);
  }

  .prompt-template-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .prompt-template button {
    width: 100%;
  }

  .final-checklist li {
    grid-template-columns: 2.2rem 1fr;
    gap: 0.8rem;
  }

  .article-cta {
    align-items: start;
  }
}

@media (max-width: 21.25rem) {
  .article-hero h1 {
    font-size: 14vw;
  }

  .article-content h2 {
    font-size: 2.45rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .reading-progress {
    display: none;
  }

  .term-tooltip__content {
    transition: none;
  }
}