/* ============================================================
   The best model is not the best product — field note 02
   Extends the shared editorial system in model_openness.css.
   ============================================================ */

.mark-article {
  --mark-blue: #b9ddeb;
  --mark-blue-deep: #4e7888;
  --mark-violet: #c9bcf6;
  --mark-yellow: #f6cf64;
}

.mark-article .ai-section {
  padding-top: clamp(4.8rem, 7vw, 7rem);
  padding-bottom: clamp(4.8rem, 7vw, 7rem);
}

.mark-article .ai-section-heading h2 {
  letter-spacing: -0.042em;
}

.mark-article em {
  font-family: inherit;
  font-style: normal;
}

.mark-hero-accent {
  color: var(--ai-lime);
}

.mark-quote-accent {
  color: #587c4f;
}

.mark-section--process .ai-section-heading h2 {
  letter-spacing: -0.028em;
}

.mark-article .mark-hero {
  background:
    radial-gradient(circle at 10% 92%, rgba(185, 221, 235, 0.11), transparent 29%),
    radial-gradient(circle at 92% 10%, rgba(246, 207, 100, 0.1), transparent 26%),
    var(--ai-forest);
}

.mark-article .ai-hero__copy h1 {
  font-size: clamp(4rem, 7vw, 7.3rem);
}

.mark-hero-board {
  position: relative;
  width: min(100%, 36rem);
  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);
}

.mark-hero-board::before {
  position: absolute;
  z-index: -1;
  inset: -1.2rem 1.8rem 1.8rem -1.2rem;
  border: 1px solid rgba(185, 221, 235, 0.1);
  border-radius: 1.4rem;
  content: "";
}

.mark-hero-board figcaption {
  margin-bottom: 0.85rem;
  color: rgba(247, 242, 233, 0.43);
  font-family: var(--ai-mono);
  font-size: 0.58rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.mark-rank-list {
  display: grid;
  gap: 0.46rem;
}

.mark-rank {
  display: grid;
  min-height: 4.7rem;
  padding: 0.75rem 0.9rem;
  grid-template-columns: 2rem 1fr auto;
  align-items: center;
  gap: 0.72rem;
  border: 1px solid rgba(247, 242, 233, 0.13);
  border-radius: 0.78rem;
  background: rgba(247, 242, 233, 0.05);
}

.mark-rank--one {
  border-color: rgba(246, 207, 100, 0.38);
  background: rgba(246, 207, 100, 0.1);
}

.mark-rank > span {
  display: grid;
  width: 1.8rem;
  height: 1.8rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: rgba(247, 242, 233, 0.48);
  font-family: var(--ai-mono);
  font-size: 0.52rem;
}

.mark-rank small,
.mark-rank strong {
  display: block;
}

.mark-rank small {
  margin-bottom: 0.13rem;
  color: rgba(247, 242, 233, 0.4);
  font-family: var(--ai-mono);
  font-size: 0.5rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.mark-rank strong {
  color: rgba(247, 242, 233, 0.87);
  font-size: 0.78rem;
  font-weight: 650;
}

.mark-rank b {
  color: var(--mark-yellow);
  font-family: var(--ai-mono);
  font-size: 1.05rem;
  font-weight: 500;
}

.mark-board-arrow {
  display: grid;
  height: 2.5rem;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.75rem;
  color: var(--ai-coral);
}

.mark-board-arrow span {
  height: 1px;
  background: rgba(247, 242, 233, 0.11);
}

.mark-board-arrow b {
  font-family: var(--ai-serif);
  font-size: 1.2rem;
}

.mark-product-score {
  padding: 1rem;
  border: 1px solid rgba(217, 249, 157, 0.34);
  border-radius: 0.85rem;
  background: var(--ai-lime);
  color: var(--ai-ink);
}

.mark-product-score > p {
  margin: 0 0 0.75rem;
  font-family: var(--ai-mono);
  font-size: 0.53rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mark-product-score > div {
  display: grid;
  margin: 0.42rem 0;
  grid-template-columns: 5rem 1fr;
  align-items: center;
  gap: 0.65rem;
}

.mark-product-score > div span {
  font-size: 0.65rem;
  font-weight: 600;
}

.mark-product-score > div i {
  height: 0.35rem;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(23, 35, 27, 0.12);
}

.mark-product-score > div i::after {
  display: block;
  width: var(--score);
  height: 100%;
  border-radius: inherit;
  background: var(--ai-forest);
  content: "";
}

.mark-product-score > strong {
  display: block;
  margin-top: 0.8rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(23, 35, 27, 0.16);
  font-size: 0.82rem;
}

.mark-board-note {
  display: flex;
  margin: 0.95rem 0 0;
  gap: 0.5rem;
  color: rgba(247, 242, 233, 0.5);
  font-family: var(--ai-sans);
  font-size: 0.78rem;
  font-style: normal;
}

.mark-board-note span {
  color: var(--ai-coral);
  font-family: var(--ai-sans);
  font-style: normal;
}

/* ---------- Long-form copy ---------- */

.mark-prose {
  color: var(--ai-ink-soft);
  font-size: clamp(1.07rem, 1.42vw, 1.23rem);
  line-height: 1.78;
}

.mark-prose--opening,
.mark-prose--commercial {
  margin-top: 3.2rem;
}

.mark-prose p {
  margin: 0 0 1.5rem;
}

.mark-prose p:last-child {
  margin-bottom: 0;
}

.mark-prose a {
  color: var(--ai-ink);
  font-weight: 650;
  text-decoration-color: var(--ai-coral);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.22em;
}

.mark-commercial-test {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding: clamp(1.5rem, 3.5vw, 2.7rem);
  border: 1px solid var(--ai-line);
  border-left: 0.32rem solid var(--ai-coral);
  border-radius: 0.85rem;
  background: var(--ai-white);
}

.mark-commercial-test h3 {
  max-width: 48rem;
  margin: 0.6rem 0 1.5rem;
  font-size: clamp(1.65rem, 3vw, 2.7rem);
  letter-spacing: -0.045em;
  line-height: 1.05;
}

.mark-commercial-test > div {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.55rem;
}

.mark-commercial-test span {
  display: flex;
  min-height: 3.2rem;
  padding: 0.75rem 0.85rem;
  align-items: center;
  gap: 0.7rem;
  border: 1px solid var(--ai-line);
  border-radius: 0.5rem;
  color: var(--ai-ink-soft);
  font-size: 0.78rem;
}

.mark-commercial-test b {
  color: var(--ai-coral);
  font-family: var(--ai-mono);
  font-size: 0.52rem;
}

.mark-section-prose,
.mark-process-intro {
  display: grid;
  margin: 0 0 clamp(2rem, 4vw, 3.4rem);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.4rem, 4vw, 4rem);
}

.mark-section-prose p,
.mark-process-intro p,
.mark-after-figure {
  margin: 0;
  color: var(--ai-ink-soft);
  font-size: 0.94rem;
  line-height: 1.7;
}

.mark-process-intro p {
  color: rgba(247, 242, 233, 0.78);
}

.mark-after-figure {
  max-width: 64rem;
  margin: 1.5rem auto 0;
}

.mark-section-prose--models {
  margin-top: 2rem;
  margin-bottom: 2rem;
}

.mark-thesis {
  display: grid;
  margin-top: clamp(4rem, 8vw, 7rem);
  padding: clamp(2rem, 4vw, 3.3rem);
  grid-template-columns: auto minmax(0, 1.15fr) minmax(18rem, 0.7fr);
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3.6rem);
  border: 1px solid var(--ai-line);
  border-radius: 1.3rem;
  background: var(--ai-lime);
}

.mark-thesis__index {
  display: grid;
  width: 4.5rem;
  height: 4.5rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--ai-mono);
  font-size: 0.75rem;
  opacity: 0.5;
}

.mark-thesis h3 {
  max-width: 45rem;
  margin: 0.65rem 0 0;
  font-size: clamp(1.8rem, 3vw, 3rem);
  letter-spacing: -0.05em;
  line-height: 1.03;
}

.mark-thesis > p {
  margin: 0;
  color: rgba(23, 35, 27, 0.66);
  font-size: 0.98rem;
  line-height: 1.62;
}

/* ---------- Abstract inline figures ---------- */

.mark-inline-art {
  position: relative;
  margin: clamp(3rem, 7vw, 5.5rem) 0 0;
  overflow: hidden;
  border: 1px solid var(--ai-line);
  border-radius: 1.1rem;
}

.mark-inline-art figcaption {
  position: absolute;
  z-index: 4;
  top: 1.15rem;
  left: 1.25rem;
  color: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mark-inline-art--fit {
  min-height: 20rem;
  background:
    radial-gradient(circle at 78% 48%, rgba(217, 249, 157, 0.48), transparent 23%),
    linear-gradient(135deg, rgba(185, 221, 235, 0.34), rgba(255, 253, 248, 0.7) 55%),
    var(--ai-white);
}

.mark-fit-field {
  position: absolute;
  inset: 3.2rem 2rem 3.5rem;
}

.mark-fit-field > i {
  position: absolute;
  width: 0.65rem;
  height: 0.65rem;
  border: 1px solid var(--ai-ink);
  border-radius: 50%;
  opacity: 0.34;
}

.mark-fit-field > i:nth-child(1) { top: 18%; left: 8%; }
.mark-fit-field > i:nth-child(2) { top: 62%; left: 17%; }
.mark-fit-field > i:nth-child(3) { top: 35%; left: 27%; }
.mark-fit-field > i:nth-child(4) { top: 77%; left: 38%; }
.mark-fit-field > i:nth-child(5) { top: 13%; left: 43%; }
.mark-fit-field > i:nth-child(6) { top: 50%; left: 52%; }
.mark-fit-field > i:nth-child(7) { top: 27%; left: 64%; }
.mark-fit-field > i:nth-child(8) { top: 72%; left: 70%; }
.mark-fit-field > i:nth-child(9) { top: 16%; left: 86%; }

.mark-fit-field__sweep {
  position: absolute;
  top: 50%;
  left: 5%;
  width: 67%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--ai-coral));
  transform: rotate(-7deg);
}

.mark-fit-field__sweep::before,
.mark-fit-field__sweep::after {
  position: absolute;
  top: 50%;
  right: 0;
  width: 1.2rem;
  height: 1.2rem;
  border-top: 1px solid var(--ai-coral);
  border-right: 1px solid var(--ai-coral);
  content: "";
  transform: translateY(-50%) rotate(45deg);
}

.mark-fit-field__sweep::after {
  right: 1rem;
  opacity: 0.4;
}

.mark-fit-field__target {
  position: absolute;
  top: 50%;
  right: 8%;
  width: 7rem;
  height: 7rem;
  border: 1px solid var(--ai-ink);
  border-radius: 50%;
  transform: translateY(-50%);
}

.mark-fit-field__target::before,
.mark-fit-field__target::after {
  position: absolute;
  border: 1px solid var(--ai-ink);
  border-radius: 50%;
  content: "";
  inset: 1rem;
  opacity: 0.55;
}

.mark-fit-field__target::after { inset: 2rem; opacity: 0.32; }

.mark-fit-field__target b {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: var(--ai-coral);
  transform: translate(-50%, -50%);
}

.mark-fit-labels {
  position: absolute;
  right: 2rem;
  bottom: 1.15rem;
  left: 2rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  color: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 0.52rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.mark-fit-labels i {
  color: var(--ai-coral);
  font-style: normal;
}

.mark-fit-labels strong {
  color: var(--ai-ink);
  font-weight: 600;
  text-align: right;
}

.mark-inline-art--structure {
  display: grid;
  min-height: 15rem;
  padding: 4.2rem clamp(1.2rem, 4vw, 3rem) 1.5rem;
  grid-template-columns: minmax(10rem, 0.8fr) minmax(5rem, 0.3fr) minmax(14rem, 1fr);
  align-items: center;
  gap: 1.5rem;
  border-color: rgba(247, 242, 233, 0.2);
  background: rgba(247, 242, 233, 0.08);
}

.mark-inline-art--structure figcaption { color: rgba(247, 242, 233, 0.64); }

.mark-structure-raw {
  position: relative;
  min-height: 8rem;
  border: 1px solid rgba(247, 242, 233, 0.25);
  border-radius: 0.65rem;
  transform: rotate(-2deg);
}

.mark-structure-raw i {
  position: absolute;
  left: 14%;
  height: 1px;
  background: rgba(247, 242, 233, 0.52);
  transform-origin: left;
}

.mark-structure-raw i:nth-child(1) { top: 24%; width: 63%; transform: rotate(3deg); }
.mark-structure-raw i:nth-child(2) { top: 39%; width: 47%; transform: rotate(-4deg); }
.mark-structure-raw i:nth-child(3) { top: 55%; width: 69%; transform: rotate(2deg); }
.mark-structure-raw i:nth-child(4) { top: 69%; width: 38%; transform: rotate(-6deg); }
.mark-structure-raw i:nth-child(5) { top: 82%; width: 57%; transform: rotate(4deg); }

.mark-structure-raw span {
  position: absolute;
  right: 0.7rem;
  bottom: 0.55rem;
  color: rgba(247, 242, 233, 0.48);
  font-family: var(--ai-mono);
  font-size: 0.46rem;
  text-transform: uppercase;
}

.mark-structure-flow {
  display: flex;
  justify-content: center;
  gap: 0.3rem;
}

.mark-structure-flow i {
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 50%;
  background: var(--ai-coral);
}

.mark-structure-flow i:nth-child(1) { opacity: 0.3; }
.mark-structure-flow i:nth-child(2) { opacity: 0.6; }

.mark-structure-records {
  display: grid;
  gap: 0.45rem;
}

.mark-structure-records > span {
  display: grid;
  min-height: 2.6rem;
  padding: 0.55rem 0.7rem;
  grid-template-columns: 2.5rem 1fr 0.65fr;
  align-items: center;
  gap: 0.6rem;
  border: 1px solid rgba(217, 249, 157, 0.35);
  border-radius: 0.5rem;
  background: rgba(217, 249, 157, 0.1);
}

.mark-structure-records b {
  color: var(--ai-lime);
  font-family: var(--ai-mono);
  font-size: 0.5rem;
}

.mark-structure-records i {
  height: 0.3rem;
  border-radius: 999px;
  background: rgba(247, 242, 233, 0.48);
}

.mark-inline-art--structure > p {
  position: absolute;
  right: 1.5rem;
  bottom: 0.75rem;
  margin: 0;
  color: rgba(247, 242, 233, 0.58);
  font-family: var(--ai-serif);
  font-size: 0.72rem;
  font-style: italic;
}

.mark-inline-art--loop {
  min-height: 19rem;
  background:
    radial-gradient(circle at 50% 50%, rgba(217, 249, 157, 0.34), transparent 25%),
    var(--ai-white);
}

.mark-learning-loop {
  position: absolute;
  inset: 3.8rem 2rem 1.5rem;
}

.mark-learning-loop::before {
  position: absolute;
  border: 1px solid var(--ai-line);
  border-radius: 50%;
  content: "";
  inset: 7% 13%;
}

.mark-learning-loop__node {
  position: absolute;
  z-index: 2;
  display: flex;
  width: 8.5rem;
  min-height: 4.6rem;
  padding: 0.7rem;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  border: 1px solid var(--ai-line);
  border-radius: 999px;
  background: var(--ai-paper);
  font-size: 0.83rem;
  font-weight: 700;
  text-align: center;
}

.mark-learning-loop__node small {
  margin-top: 0.2rem;
  color: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 0.43rem;
  font-weight: 500;
  text-transform: uppercase;
}

.mark-learning-loop__node--submit { top: 50%; left: 0; transform: translateY(-50%); }
.mark-learning-loop__node--mark { top: 0; left: 50%; background: var(--mark-blue); transform: translateX(-50%); }
.mark-learning-loop__node--feedback { top: 50%; right: 0; background: var(--ai-lime); transform: translateY(-50%); }
.mark-learning-loop__node--ask { bottom: 0; left: 50%; background: var(--mark-violet); transform: translateX(-50%); }

.mark-learning-loop__arc {
  position: absolute;
  z-index: 1;
  width: 0.65rem;
  height: 0.65rem;
  border-top: 2px solid var(--ai-coral);
  border-right: 2px solid var(--ai-coral);
  transform: rotate(45deg);
}

.mark-learning-loop__arc--one { top: 16%; left: 29%; transform: rotate(-8deg); }
.mark-learning-loop__arc--two { top: 25%; right: 25%; transform: rotate(65deg); }
.mark-learning-loop__arc--three { right: 27%; bottom: 14%; transform: rotate(122deg); }

/* ---------- Monolithic architecture ---------- */

.mark-monolith {
  display: grid;
  padding: clamp(1.2rem, 3vw, 2rem);
  grid-template-columns: minmax(15rem, 0.9fr) minmax(8rem, 0.45fr) minmax(20rem, 1fr);
  align-items: stretch;
  gap: clamp(1.2rem, 3vw, 2.8rem);
  border: 1px solid var(--ai-line);
  border-radius: 1.35rem;
  background:
    linear-gradient(90deg, rgba(185, 221, 235, 0.08), transparent 38%),
    var(--ai-white);
  box-shadow: 0 25px 60px rgba(23, 35, 27, 0.06);
}

.mark-monolith figcaption {
  display: flex;
  padding-bottom: 1rem;
  grid-column: 1 / -1;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--ai-line);
  color: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 0.56rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mark-monolith__tasks {
  display: grid;
  align-content: center;
  gap: 0.5rem;
}

.mark-monolith__tasks span {
  display: flex;
  min-height: 2.8rem;
  padding: 0.65rem 0.8rem;
  align-items: center;
  gap: 0.75rem;
  border: 1px solid var(--ai-line);
  border-radius: 0.55rem;
  color: var(--ai-ink-soft);
  font-size: 0.76rem;
  font-weight: 600;
}

.mark-monolith__tasks b {
  color: var(--ai-coral);
  font-family: var(--ai-mono);
  font-size: 0.52rem;
  font-weight: 500;
}

.mark-monolith__compression {
  position: relative;
  display: grid;
  min-height: 22rem;
  place-items: center;
  overflow: hidden;
}

.mark-monolith__compression::before,
.mark-monolith__compression::after {
  position: absolute;
  top: 50%;
  width: 1.3rem;
  height: 1.3rem;
  border-top: 1px solid var(--ai-coral);
  border-right: 1px solid var(--ai-coral);
  content: "";
  transform: translateY(-50%) rotate(45deg);
}

.mark-monolith__compression::before { left: 0; }
.mark-monolith__compression::after { right: 0; }

.mark-monolith__compression i {
  position: absolute;
  left: 0.8rem;
  width: calc(100% - 1.6rem);
  height: 1px;
  background: var(--ai-line);
  transform-origin: right center;
}

.mark-monolith__compression i:nth-child(1) { top: 12%; transform: rotate(18deg); }
.mark-monolith__compression i:nth-child(2) { top: 27%; transform: rotate(12deg); }
.mark-monolith__compression i:nth-child(3) { top: 42%; transform: rotate(5deg); }
.mark-monolith__compression i:nth-child(4) { top: 57%; transform: rotate(-5deg); }
.mark-monolith__compression i:nth-child(5) { top: 72%; transform: rotate(-12deg); }
.mark-monolith__compression i:nth-child(6) { top: 87%; transform: rotate(-18deg); }

.mark-monolith__compression span {
  position: relative;
  z-index: 2;
  display: grid;
  width: 5.5rem;
  height: 5.5rem;
  place-items: center;
  border-radius: 50%;
  background: var(--ai-forest);
  color: var(--ai-lime);
  font-family: var(--ai-mono);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
}

.mark-monolith__trace {
  display: flex;
  min-height: 22rem;
  padding: clamp(1.3rem, 2.5vw, 2rem);
  justify-content: center;
  flex-direction: column;
  border-radius: 1rem;
  background: var(--ai-forest);
  color: var(--ai-paper);
}

.mark-monolith__trace-line {
  display: flex;
  height: 2.8rem;
  margin-bottom: 1.6rem;
  align-items: end;
  gap: 0.35rem;
}

.mark-monolith__trace-line i {
  display: block;
  width: 1.7rem;
  height: 35%;
  border-radius: 999px;
  background: var(--ai-lime);
  opacity: 0.24;
}

.mark-monolith__trace-line i:nth-child(2) { height: 78%; opacity: 0.4; }
.mark-monolith__trace-line i:nth-child(3) { height: 50%; opacity: 0.3; }
.mark-monolith__trace-line i:nth-child(4) { height: 92%; opacity: 0.5; }
.mark-monolith__trace-line i:nth-child(5) { height: 63%; opacity: 0.34; }

.mark-monolith__trace strong {
  font-size: 1.35rem;
  letter-spacing: -0.035em;
}

.mark-monolith__trace p {
  margin: 0.5rem 0 1.25rem;
  color: rgba(247, 242, 233, 0.68);
  font-size: 0.8rem;
  line-height: 1.55;
}

.mark-monolith__trace ul {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 0.55rem;
  list-style: none;
}

.mark-monolith__trace li {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: rgba(247, 242, 233, 0.78);
  font-size: 0.72rem;
}

.mark-monolith__trace li span {
  width: 0.45rem;
  height: 0.45rem;
  flex: 0 0 auto;
  border: 1px solid var(--ai-coral);
  border-radius: 50%;
}

.mark-failure-grid {
  display: grid;
  margin-top: 1rem;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.7rem;
}

.mark-failure-grid article {
  min-height: 13rem;
  padding: 1.45rem;
  border: 1px solid var(--ai-line);
  border-radius: 0.9rem;
  background: rgba(255, 253, 248, 0.58);
}

.mark-failure-grid span,
.mark-principles span {
  color: var(--ai-coral);
  font-family: var(--ai-mono);
  font-size: 0.58rem;
}

.mark-failure-grid h3,
.mark-principles h3 {
  margin: 2.5rem 0 0.55rem;
  font-size: 1.08rem;
  letter-spacing: -0.025em;
}

.mark-failure-grid p,
.mark-principles p {
  margin: 0;
  color: var(--ai-ink-soft);
  font-size: 0.83rem;
  line-height: 1.55;
}

/* ---------- MARK pipeline ---------- */

.mark-pipeline {
  margin: 0;
  padding: clamp(1rem, 2.5vw, 1.7rem);
  border: 1px solid rgba(247, 242, 233, 0.25);
  border-radius: 1.3rem;
  background: rgba(247, 242, 233, 0.075);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.16);
}

.mark-pipeline figcaption {
  display: flex;
  margin-bottom: 1.1rem;
  justify-content: space-between;
  gap: 1rem;
  color: rgba(247, 242, 233, 0.7);
  font-family: var(--ai-mono);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mark-pipeline__track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr) auto) minmax(0, 1fr);
  align-items: stretch;
  gap: 0.45rem;
}

.mark-pipeline-step {
  position: relative;
  min-height: 18rem;
  padding: 1.15rem;
  border: 1px solid rgba(247, 242, 233, 0.26);
  border-radius: 0.85rem;
  background: rgba(247, 242, 233, 0.1);
}

.mark-pipeline-step--code {
  border-color: rgba(185, 221, 235, 0.48);
  background: rgba(185, 221, 235, 0.14);
}

.mark-pipeline-step--workhorse {
  border-color: rgba(217, 249, 157, 0.5);
  background: rgba(217, 249, 157, 0.14);
}

.mark-pipeline-step--route {
  border-color: rgba(201, 188, 246, 0.48);
  background: rgba(201, 188, 246, 0.14);
}

.mark-pipeline-step__number {
  display: grid;
  width: 2rem;
  height: 2rem;
  margin-bottom: 2.5rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: rgba(247, 242, 233, 0.7);
  font-family: var(--ai-mono);
  font-size: 0.52rem;
}

.mark-pipeline-step small {
  color: #e1ffab;
  font-family: var(--ai-mono);
  font-size: 0.49rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.mark-pipeline-step h3 {
  margin: 0.55rem 0 0.65rem;
  color: var(--ai-paper);
  font-size: 1.15rem;
  letter-spacing: -0.03em;
}

.mark-pipeline-step p {
  margin: 0;
  color: rgba(247, 242, 233, 0.8);
  font-size: 0.77rem;
  line-height: 1.55;
}

.mark-pipeline-step b {
  position: absolute;
  right: 1.1rem;
  bottom: 1.1rem;
  left: 1.1rem;
  padding-top: 0.7rem;
  border-top: 1px solid rgba(247, 242, 233, 0.24);
  color: rgba(247, 242, 233, 0.92);
  font-family: var(--ai-mono);
  font-size: 0.54rem;
  font-weight: 500;
}

.mark-pipeline__connector {
  align-self: center;
  color: var(--ai-coral);
  font-family: var(--ai-sans);
  font-style: normal;
}

.mark-pipeline__branches {
  display: grid;
  margin-top: 0.65rem;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
}

.mark-pipeline-branch {
  padding: 1.2rem;
  border: 1px solid rgba(247, 242, 233, 0.26);
  border-radius: 0.8rem;
}

.mark-pipeline-branch--frontier { background: rgba(201, 188, 246, 0.17); }
.mark-pipeline-branch--feedback { background: rgba(246, 207, 100, 0.15); }
.mark-pipeline-branch--human { background: rgba(241, 114, 81, 0.16); }

.mark-pipeline-branch span,
.mark-pipeline-branch strong,
.mark-pipeline-branch small {
  display: block;
}

.mark-pipeline-branch span {
  margin-bottom: 1.2rem;
  color: rgba(247, 242, 233, 0.68);
  font-family: var(--ai-mono);
  font-size: 0.49rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.mark-pipeline-branch strong {
  color: var(--ai-paper);
  font-size: 0.92rem;
}

.mark-pipeline-branch small {
  margin-top: 0.55rem;
  color: rgba(247, 242, 233, 0.76);
  font-size: 0.7rem;
  line-height: 1.5;
}

.mark-process-notes {
  display: grid;
  margin-top: 1rem;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.7rem;
}

.mark-process-notes article {
  padding: 1.3rem;
  border-top: 1px solid rgba(217, 249, 157, 0.55);
  background: rgba(247, 242, 233, 0.08);
}

.mark-process-notes span {
  color: var(--ai-lime);
  font-size: 0.8rem;
  font-weight: 650;
}

.mark-process-notes p {
  margin: 0.55rem 0 0;
  color: rgba(247, 242, 233, 0.76);
  font-size: 0.78rem;
  line-height: 1.58;
}

.mark-technical {
  margin-top: 1rem;
  border: 1px solid rgba(247, 242, 233, 0.25);
  border-radius: 0.85rem;
  background: rgba(247, 242, 233, 0.07);
}

.mark-technical summary {
  display: flex;
  min-height: 4.5rem;
  padding: 1rem 1.3rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: rgba(247, 242, 233, 0.7);
  cursor: pointer;
  font-size: 0.85rem;
  list-style: none;
}

.mark-technical summary::-webkit-details-marker { display: none; }

.mark-technical summary b {
  margin-right: 0.65rem;
  color: var(--ai-lime);
  font-family: var(--ai-mono);
  font-size: 0.54rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mark-technical summary i {
  color: var(--ai-coral);
  font-size: 1.2rem;
  font-style: normal;
  transition: transform 180ms ease;
}

.mark-technical[open] summary i { transform: rotate(45deg); }

.mark-technical > div {
  padding: 0 1.3rem 1.3rem;
}

.mark-technical p {
  max-width: 54rem;
  margin: 0;
  color: rgba(247, 242, 233, 0.78);
  font-size: 0.85rem;
  line-height: 1.65;
}

/* ---------- Evidence ---------- */

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

.mark-evidence-card {
  min-height: 22rem;
  padding: clamp(1.5rem, 3vw, 2.2rem);
  border: 1px solid var(--ai-line);
  border-radius: 1.05rem;
}

.mark-evidence-card--number { background: var(--mark-blue); }
.mark-evidence-card--cost { background: var(--ai-lime); }
.mark-evidence-card--quality { background: var(--mark-violet); }

.mark-evidence-card__label {
  font-family: var(--ai-mono);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.mark-evidence-card strong {
  display: block;
  margin: 5.8rem 0 1rem;
  font-size: clamp(2.5rem, 4.6vw, 4.7rem);
  letter-spacing: -0.07em;
  line-height: 0.94;
}

.mark-evidence-card p {
  margin: 0;
  color: rgba(23, 35, 27, 0.66);
  font-size: 0.88rem;
  line-height: 1.55;
}

.mark-chemistry-case {
  display: grid;
  margin-top: 1rem;
  padding: clamp(2rem, 4.5vw, 4rem);
  grid-template-columns: minmax(15rem, 0.7fr) minmax(0, 1.1fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 6rem);
  border-radius: 1.2rem;
  background: var(--ai-forest);
  color: var(--ai-paper);
}

.mark-chemistry-case__equation {
  display: grid;
  padding: 2rem;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.55rem;
  border: 1px solid rgba(247, 242, 233, 0.15);
  border-radius: 1rem;
  background: rgba(247, 242, 233, 0.05);
}

.mark-chemistry-case__equation span {
  color: rgba(247, 242, 233, 0.5);
  font-family: var(--ai-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
}

.mark-chemistry-case__equation strong {
  display: grid;
  width: 4rem;
  height: 4rem;
  place-items: center;
  border: 1px solid var(--ai-coral);
  border-radius: 50%;
  color: var(--ai-coral);
  font-family: var(--ai-serif);
  font-size: 1.5rem;
  text-decoration: line-through;
}

.mark-chemistry-case__equation i {
  grid-column: 2;
  color: rgba(247, 242, 233, 0.3);
  font-style: normal;
  text-align: center;
}

.mark-chemistry-case__equation strong.is-correct {
  border-color: var(--ai-lime);
  color: var(--ai-lime);
  text-decoration: none;
}

.mark-chemistry-case h3 {
  margin: 0.7rem 0 1rem;
  font-size: clamp(2rem, 4vw, 3.8rem);
  letter-spacing: -0.06em;
  line-height: 0.98;
}

.mark-chemistry-case > div:last-child > p:last-child {
  margin: 0;
  color: rgba(247, 242, 233, 0.56);
  font-size: 0.95rem;
  line-height: 1.65;
}

.mark-latency-truth {
  display: grid;
  margin-top: 1rem;
  padding: clamp(1.7rem, 3.5vw, 3rem);
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 1.8rem;
  border: 1px solid var(--ai-line);
  border-radius: 1rem;
  background: var(--ai-white);
}

.mark-latency-truth__icon {
  display: grid;
  width: 5rem;
  height: 5rem;
  place-items: center;
  border: 1px solid var(--ai-line);
  border-radius: 50%;
  color: var(--ai-coral);
  font-size: 2rem;
}

.mark-latency-truth h3 {
  margin: 0.55rem 0 0.45rem;
  font-size: 1.45rem;
  letter-spacing: -0.035em;
}

.mark-latency-truth > div > p:last-child {
  max-width: 55rem;
  margin: 0;
  color: var(--ai-ink-soft);
  font-size: 0.9rem;
  line-height: 1.62;
}

/* ---------- Model portfolio ---------- */

.mark-portfolio {
  position: relative;
  display: grid;
  min-height: 42rem;
  margin: 0;
  padding: 4.8rem 3rem 4.5rem 5rem;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: repeat(10, 1fr);
  gap: 0.5rem;
  overflow: hidden;
  border: 1px solid var(--ai-line);
  border-radius: 1.3rem;
  background: var(--ai-white);
}

.mark-portfolio figcaption {
  position: absolute;
  top: 1.4rem;
  left: 1.5rem;
  color: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 0.57rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mark-portfolio__grid {
  position: absolute;
  z-index: 0;
  inset: 4.8rem 3rem 4.5rem 5rem;
  border-bottom: 1px solid var(--ai-line);
  border-left: 1px solid var(--ai-line);
  background-image:
    linear-gradient(var(--ai-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--ai-line) 1px, transparent 1px);
  background-size: 20% 20%;
  opacity: 0.55;
}

.mark-portfolio__axis {
  position: absolute;
  z-index: 2;
  color: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 0.52rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mark-portfolio__axis--y {
  top: 50%;
  left: 1.15rem;
  transform: rotate(-90deg) translateX(-50%);
  transform-origin: top left;
}

.mark-portfolio__axis--x {
  right: 3rem;
  bottom: 1.6rem;
}

.mark-model-role {
  position: relative;
  z-index: 2;
  padding: 1.35rem;
  border: 1px solid var(--ai-line);
  border-radius: 1rem;
  box-shadow: 0 18px 35px rgba(23, 35, 27, 0.08);
}

.mark-model-role--frontier {
  grid-area: 1 / 1 / 6 / 6;
  background: var(--mark-violet);
}

.mark-model-role--workhorse {
  grid-area: 4 / 5 / 10 / 10;
  background: var(--ai-lime);
}

.mark-model-role--budget {
  grid-area: 6 / 9 / 11 / 13;
  background: var(--mark-blue);
}

.mark-model-role > span {
  font-family: var(--ai-mono);
  font-size: 0.57rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.mark-model-role h3 {
  margin: 2rem 0 0.65rem;
  font-size: clamp(1.25rem, 2.2vw, 2rem);
  letter-spacing: -0.05em;
  line-height: 1.03;
}

.mark-model-role p {
  margin: 0;
  color: rgba(23, 35, 27, 0.62);
  font-size: 0.82rem;
  line-height: 1.5;
}

.mark-model-role b {
  position: absolute;
  right: 1.35rem;
  bottom: 1.35rem;
  left: 1.35rem;
  padding-top: 0.65rem;
  border-top: 1px solid rgba(23, 35, 27, 0.15);
  font-family: var(--ai-mono);
  font-size: 0.5rem;
  font-weight: 500;
}

.mark-portfolio-note {
  max-width: 58rem;
  margin: 1.25rem auto 0;
  color: var(--ai-ink-soft);
  font-family: var(--ai-sans);
  font-size: 0.9rem;
  font-style: normal;
  line-height: 1.6;
  text-align: center;
}

.mark-open-weight-callout {
  display: grid;
  margin-top: clamp(4rem, 8vw, 7rem);
  padding: clamp(2rem, 4vw, 3.4rem);
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 6vw, 6rem);
  border-radius: 1.25rem;
  background: var(--ai-forest);
  color: var(--ai-paper);
}

.mark-open-weight-callout h3 {
  margin: 0.7rem 0 0;
  font-size: clamp(2rem, 4vw, 3.7rem);
  letter-spacing: -0.06em;
  line-height: 0.98;
}

.mark-open-weight-callout__copy p {
  margin: 0 0 1rem;
  color: rgba(247, 242, 233, 0.57);
  font-size: 0.9rem;
  line-height: 1.65;
}

.mark-cost-formula {
  display: flex;
  padding-top: 1.6rem;
  grid-column: 1 / -1;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  border-top: 1px solid rgba(247, 242, 233, 0.12);
  flex-wrap: wrap;
}

.mark-cost-formula span,
.mark-cost-formula strong {
  padding: 0.6rem 0.72rem;
  border: 1px solid rgba(247, 242, 233, 0.15);
  border-radius: 999px;
  font-family: var(--ai-mono);
  font-size: 0.52rem;
  font-weight: 500;
  text-transform: uppercase;
}

.mark-cost-formula strong {
  border-color: var(--ai-lime);
  background: var(--ai-lime);
  color: var(--ai-ink);
}

.mark-cost-formula i {
  color: var(--ai-coral);
  font-style: normal;
}

/* ---------- Commercial principles and closing ---------- */

.mark-principles {
  display: grid;
  margin-top: clamp(4rem, 8vw, 7rem);
  grid-template-columns: repeat(4, 1fr);
  gap: 0.7rem;
}

.mark-principles article {
  min-height: 15rem;
  padding: 1.5rem;
  border-top: 2px solid var(--ai-ink);
  background: var(--ai-cream);
}

.mark-disclosure {
  display: grid;
  margin-top: 5rem;
  padding-top: 1.5rem;
  grid-template-columns: 12rem 1fr;
  gap: 2rem;
  border-top: 1px solid rgba(247, 242, 233, 0.13);
}

.mark-disclosure p:last-child {
  max-width: 54rem;
  margin: 0;
  color: rgba(247, 242, 233, 0.45);
  font-family: var(--ai-mono);
  font-size: 0.59rem;
  line-height: 1.65;
}

.mark-section--process .ai-section-heading--light > p:last-child {
  color: rgba(247, 242, 233, 0.78);
}

/* ---------- Floating share rail ---------- */

.mark-share-rail {
  position: fixed;
  z-index: 45;
  top: 50%;
  right: 18px;
  display: none;
  align-items: center;
  flex-direction: column;
  gap: 8px;
  transform: translateY(-50%);
}

.mark-share-rail > span {
  margin-bottom: 4px;
  color: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 0.52rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

.mark-share-rail a,
.mark-share-rail button {
  display: grid;
  width: 42px;
  height: 42px;
  padding: 0;
  place-items: center;
  border: 1px solid rgba(23, 35, 27, 0.22);
  border-radius: 50%;
  background: var(--ai-white);
  box-shadow: 0 1px 2px rgba(23, 35, 27, 0.06), 0 7px 20px -10px rgba(23, 35, 27, 0.28);
  color: var(--ai-ink);
  cursor: pointer;
  text-decoration: none;
  transition: background 150ms ease, border-color 150ms ease, color 150ms ease, transform 150ms ease;
}

.mark-share-rail a:hover,
.mark-share-rail button:hover {
  border-color: var(--ai-ink);
  background: var(--ai-lime);
  transform: translateX(-2px);
}

.mark-share-rail button.is-done {
  border-color: #1f7a4d;
  background: #1f7a4d;
  color: #fff;
}

.mark-share-rail svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.mark-share-rail svg.is-filled {
  fill: currentColor;
  stroke: none;
}

/* ---------- Revised explanatory graphics ---------- */

.mark-monolith {
  grid-template-columns: minmax(9rem, 0.55fr) auto minmax(26rem, 2fr) auto minmax(10rem, 0.65fr);
  align-items: center;
  gap: clamp(0.7rem, 1.5vw, 1.4rem);
}

.mark-monolith__inputs {
  display: grid;
  gap: 0.65rem;
}

.mark-monolith__inputs span {
  display: flex;
  min-height: 4.6rem;
  padding: 0.9rem;
  justify-content: center;
  flex-direction: column;
  border: 1px solid var(--ai-line);
  border-radius: 0.65rem;
  color: var(--ai-ink);
  font-size: 0.78rem;
  font-weight: 650;
}

.mark-monolith__inputs b,
.mark-monolith__output > span,
.mark-monolith__call-label {
  margin-bottom: 0.3rem;
  color: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 0.48rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.mark-monolith__arrow {
  color: var(--ai-coral);
  font-size: 1.45rem;
  font-style: normal;
}

.mark-monolith__call {
  min-height: 16rem;
  padding: clamp(1.3rem, 2.6vw, 2.2rem);
  border-radius: 1rem;
  background: var(--ai-forest);
  color: var(--ai-paper);
}

.mark-monolith__call-label {
  display: block;
  color: var(--ai-lime);
}

.mark-monolith__jobs {
  display: grid;
  margin-top: 2.3rem;
  grid-template-columns: minmax(6.5rem, 1fr) auto minmax(9rem, 1.35fr) auto minmax(6.5rem, 1fr);
  align-items: center;
  gap: 0.3rem;
}

.mark-monolith__jobs article {
  display: flex;
  min-height: 6.5rem;
  padding: 0.75rem;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  border: 1px solid rgba(247, 242, 233, 0.18);
  border-radius: 0.55rem;
  background: rgba(247, 242, 233, 0.06);
  font-size: 0.68rem;
  font-weight: 650;
  text-align: center;
}

.mark-monolith__jobs b {
  margin-bottom: 0.35rem;
  color: var(--ai-coral);
  font-family: var(--ai-mono);
  font-size: 0.44rem;
  font-weight: 500;
}

.mark-monolith__jobs i {
  color: rgba(247, 242, 233, 0.35);
  font-style: normal;
}

.mark-monolith__jobs strong {
  font-size: 0.72rem;
}

.mark-monolith__jobs small {
  margin-top: 0.35rem;
  color: rgba(247, 242, 233, 0.55);
  font-size: 0.52rem;
  font-weight: 400;
  line-height: 1.35;
}

.mark-monolith__call > p {
  margin: 1.6rem 0 0;
  color: rgba(247, 242, 233, 0.58);
  font-family: var(--ai-mono);
  font-size: 0.5rem;
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: uppercase;
}

.mark-monolith__output {
  display: flex;
  min-height: 11rem;
  padding: 1.25rem;
  justify-content: center;
  flex-direction: column;
  border: 1px solid var(--ai-line);
  border-radius: 0.8rem;
  background: var(--ai-lime);
}

.mark-monolith__output strong {
  font-size: 1.1rem;
  letter-spacing: -0.025em;
}

.mark-monolith__output p {
  margin: 0.45rem 0 1.4rem;
  color: var(--ai-ink-soft);
  font-size: 0.72rem;
}

.mark-monolith__output > b {
  padding-top: 0.65rem;
  border-top: 1px solid rgba(23, 35, 27, 0.18);
  color: #9b402e;
  font-family: var(--ai-mono);
  font-size: 0.48rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.mark-inline-art--loop {
  min-height: 0;
  padding: 3.1rem 1rem 0.5rem;
}

.mark-learning-loop {
  position: static;
  display: block;
  width: 100%;
  height: auto;
}

.mark-learning-loop__paths path {
  fill: none;
  stroke: var(--ai-coral);
  stroke-width: 2;
  marker-end: url(#mark-loop-arrow);
}

.mark-learning-loop .mark-learning-loop__node {
  position: static;
  display: block;
  width: auto;
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: none;
  transform: none;
}

.mark-learning-loop__node rect {
  stroke: var(--ai-line);
  stroke-width: 1;
}

.mark-learning-loop__node--submit rect { fill: var(--ai-paper); }
.mark-learning-loop__node--mark rect { fill: var(--mark-blue); }
.mark-learning-loop__node--feedback rect { fill: var(--ai-lime); }
.mark-learning-loop__node--ask rect { fill: var(--mark-violet); }

.mark-learning-loop__node text {
  fill: var(--ai-ink);
  font-family: var(--ai-sans);
  font-size: 17px;
  font-weight: 700;
  text-anchor: middle;
}

.mark-learning-loop__node text.is-small {
  fill: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 7px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.mark-eval-methods {
  margin-top: 1rem;
  padding: clamp(1.6rem, 3vw, 2.4rem);
  border: 1px solid var(--ai-line);
  border-radius: 1rem;
  background: var(--ai-white);
}

.mark-eval-methods > div {
  display: grid;
  margin-top: 1.3rem;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
}

.mark-eval-methods article {
  min-height: 9.5rem;
  padding: 1rem;
  border: 1px solid var(--ai-line);
  border-radius: 0.6rem;
}

.mark-eval-methods article > span {
  color: var(--ai-coral);
  font-family: var(--ai-mono);
  font-size: 0.5rem;
}

.mark-eval-methods strong {
  display: block;
  margin: 1.1rem 0 0.4rem;
  font-size: 0.85rem;
}

.mark-eval-methods article p {
  margin: 0;
  color: var(--ai-ink-soft);
  font-size: 0.72rem;
  line-height: 1.52;
}

/* ---------- Clearer process and value explanation ---------- */

.mark-pipeline__track {
  grid-template-columns: repeat(3, minmax(0, 1fr) auto) minmax(0, 1fr);
}

.mark-boundary-explainer {
  display: grid;
  margin-top: 1rem;
  padding: clamp(1.4rem, 3vw, 2.2rem);
  grid-template-columns: minmax(9rem, 0.45fr) minmax(18rem, 1fr) minmax(22rem, 1.25fr);
  align-items: center;
  gap: clamp(1rem, 3vw, 2.5rem);
  border: 1px solid rgba(247, 242, 233, 0.26);
  border-radius: 0.85rem;
  background: rgba(247, 242, 233, 0.08);
}

.mark-boundary-explainer > span {
  color: var(--ai-lime);
  font-family: var(--ai-mono);
  font-size: 0.52rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.mark-boundary-explainer strong {
  color: var(--ai-paper);
  font-size: 1rem;
  line-height: 1.45;
}

.mark-boundary-explainer p {
  margin: 0;
  color: rgba(247, 242, 233, 0.76);
  font-size: 0.78rem;
  line-height: 1.6;
}

.mark-value-detail {
  margin-top: clamp(4.5rem, 8vw, 7rem);
  padding-top: clamp(4rem, 7vw, 6rem);
  border-top: 1px solid var(--ai-line);
}

.mark-value-detail > header {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(18rem, 0.7fr);
  align-items: end;
  column-gap: clamp(2rem, 6vw, 7rem);
}

.mark-value-detail > header .ai-kicker {
  grid-column: 1 / -1;
}

.mark-value-detail > header h2 {
  max-width: 48rem;
  margin: 1.4rem 0 0;
  font-size: clamp(2.8rem, 5.8vw, 6rem);
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.mark-value-detail > header > p:last-child {
  margin: 0;
  color: var(--ai-ink-soft);
  font-size: 1rem;
  line-height: 1.65;
}

.mark-value-grid {
  display: grid;
  margin-top: clamp(2.5rem, 5vw, 4rem);
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.mark-value-grid article {
  min-height: 18rem;
  padding: clamp(1.5rem, 3vw, 2.4rem);
  border: 1px solid var(--ai-line);
  border-radius: 0.9rem;
  background: var(--ai-white);
}

.mark-value-grid article:nth-child(1) { background: var(--mark-blue); }
.mark-value-grid article:nth-child(3) { background: var(--ai-lime); }

.mark-value-grid span {
  font-family: var(--ai-mono);
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mark-value-grid h3 {
  max-width: 31rem;
  margin: 3.8rem 0 0.9rem;
  font-size: clamp(1.45rem, 2.6vw, 2.3rem);
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.mark-value-grid p {
  max-width: 35rem;
  margin: 0;
  color: var(--ai-ink-soft);
  font-size: 0.84rem;
  line-height: 1.65;
}

.mark-value-caveat {
  margin: 1rem 0 0;
  padding: 1.4rem 1.6rem;
  border-left: 0.25rem solid var(--ai-coral);
  background: var(--ai-white);
  color: var(--ai-ink-soft);
  font-size: 0.84rem;
  line-height: 1.65;
}

.mark-role-table {
  margin: 0;
  padding: clamp(1rem, 2.5vw, 1.6rem);
  border: 1px solid var(--ai-line);
  border-radius: 1.1rem;
  background: var(--ai-white);
}

.mark-role-table figcaption {
  padding: 0.4rem 0.35rem 1.2rem;
  color: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 0.55rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mark-role-table__row {
  display: grid;
  min-height: 10.5rem;
  padding: clamp(1.2rem, 2.5vw, 2rem);
  grid-template-columns: 8rem minmax(0, 1.4fr) minmax(13rem, 0.7fr);
  align-items: center;
  gap: clamp(1rem, 3vw, 3rem);
  border-top: 1px solid var(--ai-line);
}

.mark-role-table__row > span {
  display: inline-flex;
  width: fit-content;
  padding: 0.5rem 0.7rem;
  border-radius: 999px;
  font-family: var(--ai-mono);
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mark-role-table__row--frontier > span { background: var(--mark-violet); }
.mark-role-table__row--workhorse > span { background: var(--ai-lime); }
.mark-role-table__row--budget > span { background: var(--mark-blue); }

.mark-role-table__row strong,
.mark-role-table__row b,
.mark-role-table__row small {
  display: block;
}

.mark-role-table__row strong {
  font-size: 1.12rem;
}

.mark-role-table__row p {
  margin: 0.45rem 0 0;
  color: var(--ai-ink-soft);
  font-size: 0.8rem;
  line-height: 1.55;
}

.mark-role-table__row small {
  margin-bottom: 0.45rem;
  color: var(--ai-ink-soft);
  font-family: var(--ai-mono);
  font-size: 0.48rem;
  text-transform: uppercase;
}

.mark-role-table__row b {
  font-size: 0.78rem;
  font-weight: 650;
  line-height: 1.5;
}

@media (min-width: 1280px) {
  .mark-share-rail { display: flex; }
}

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

@media (max-width: 1100px) {
  .mark-pipeline__track {
    grid-template-columns: repeat(4, minmax(12rem, 1fr));
    overflow-x: auto;
    scroll-snap-type: x mandatory;
  }

  .mark-pipeline-step { scroll-snap-align: start; }
  .mark-pipeline__connector { display: none; }
}

@media (max-width: 980px) {
  .mark-hero-board {
    width: min(100%, 39rem);
    justify-self: end;
  }

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

  .mark-thesis > p {
    grid-column: 2;
  }

  .mark-monolith {
    grid-template-columns: 1fr;
  }

  .mark-monolith__jobs {
    grid-template-columns: repeat(3, 1fr);
  }

  .mark-monolith__jobs i { display: none; }

  .mark-monolith__inputs { grid-template-columns: repeat(2, 1fr); }

  .mark-monolith__arrow {
    transform: rotate(90deg);
    text-align: center;
  }

  .mark-failure-grid,
  .mark-principles {
    grid-template-columns: 1fr 1fr;
  }

  .mark-evidence-grid {
    grid-template-columns: 1fr;
  }

  .mark-eval-methods > div {
    grid-template-columns: repeat(2, 1fr);
  }

  .mark-value-detail > header {
    grid-template-columns: 1fr;
  }

  .mark-value-detail > header > p:last-child {
    max-width: 42rem;
    margin-top: 1.4rem;
  }

  .mark-role-table__row {
    grid-template-columns: 7rem minmax(0, 1fr) 12rem;
  }

  .mark-evidence-card {
    min-height: 15rem;
  }

  .mark-evidence-card strong {
    margin-top: 3rem;
  }

  .mark-portfolio {
    min-height: 50rem;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: repeat(2, 1fr);
  }

  .mark-model-role--frontier { grid-area: 1 / 1; }
  .mark-model-role--workhorse { grid-area: 1 / 2; }
  .mark-model-role--budget { grid-area: 2 / 2; }

  .mark-open-weight-callout {
    grid-template-columns: 1fr;
  }

  .mark-cost-formula { grid-column: auto; }
}

@media (max-width: 720px) {
  .mark-article .ai-hero__copy h1 {
    font-size: clamp(3.55rem, 17vw, 5.25rem);
  }

  .mark-rank {
    grid-template-columns: 1.8rem 1fr auto;
  }

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

  .mark-thesis__index {
    width: 3.5rem;
    height: 3.5rem;
  }

  .mark-thesis > p { grid-column: auto; }

  .mark-commercial-test > div,
  .mark-section-prose,
  .mark-process-intro,
  .mark-value-grid {
    grid-template-columns: 1fr;
  }

  .mark-monolith {
    grid-template-columns: 1fr;
  }

  .mark-monolith figcaption span:last-child { display: none; }

  .mark-monolith__arrow {
    transform: rotate(90deg);
    text-align: center;
  }

  .mark-monolith__jobs {
    display: flex;
    flex-direction: column;
  }

  .mark-monolith__jobs article { width: 100%; }

  .mark-monolith__jobs i {
    display: block;
    transform: rotate(90deg);
  }

  .mark-inline-art--structure {
    grid-template-columns: 1fr;
  }

  .mark-structure-flow { transform: rotate(90deg); }

  .mark-inline-art--structure > p {
    position: static;
    margin-top: 0.4rem;
  }

  .mark-inline-art--loop { padding-inline: 0; }

  .mark-eval-methods > div { grid-template-columns: 1fr; }

  .mark-failure-grid,
  .mark-pipeline__branches,
  .mark-process-notes,
  .mark-principles {
    grid-template-columns: 1fr;
  }

  .mark-failure-grid article,
  .mark-principles article {
    min-height: 11rem;
  }

  .mark-pipeline figcaption span:last-child { display: none; }
  .mark-pipeline__track {
    grid-template-columns: 1fr;
    overflow: visible;
  }

  .mark-boundary-explainer,
  .mark-role-table__row {
    grid-template-columns: 1fr;
  }

  .mark-value-grid article { min-height: 16rem; }

  .mark-technical summary span b {
    display: block;
    margin-bottom: 0.35rem;
  }

  .mark-chemistry-case {
    grid-template-columns: 1fr;
  }

  .mark-chemistry-case__equation {
    width: min(100%, 22rem);
  }

  .mark-latency-truth {
    grid-template-columns: 1fr;
  }

  .mark-latency-truth__icon {
    width: 4rem;
    height: 4rem;
  }

  .mark-portfolio {
    display: grid;
    min-height: 0;
    padding: 4.2rem 1rem 1rem;
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }

  .mark-portfolio__grid,
  .mark-portfolio__axis {
    display: none;
  }

  .mark-model-role--frontier,
  .mark-model-role--workhorse,
  .mark-model-role--budget {
    min-height: 14rem;
    grid-area: auto;
  }

  .mark-open-weight-callout {
    padding: 1.6rem;
  }

  .mark-cost-formula {
    justify-content: flex-start;
  }

  .mark-cost-formula i { display: none; }

  .mark-disclosure {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mark-technical summary i { transition: none; }
}

@media print {
  .mark-hero-board,
  .mark-pipeline,
  .mark-open-weight-callout,
  .mark-chemistry-case {
    break-inside: avoid;
  }
}