.about-hero {
  align-items: stretch;
}

.about-identity {
  align-self: stretch;
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: 10px 10px 0 var(--yellow);
}

.about-identity h2 {
  margin: 8px 0 22px;
  font-size: clamp(2rem, 4vw, 3.7rem);
  line-height: 0.98;
}

.about-identity dl {
  margin: 0;
  border-top: 1px solid var(--ink);
}

.about-identity dl div {
  display: grid;
  grid-template-columns: minmax(90px, 0.42fr) 1fr;
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.about-identity dt {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.about-identity dd {
  margin: 0;
  font-weight: 800;
}

.about-identity > a {
  display: inline-block;
  margin-top: 20px;
  font-weight: 800;
}

.about-proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: 0 auto clamp(44px, 7vw, 88px);
  width: min(1180px, calc(100% - 40px));
  border: 1px solid var(--ink);
  background: var(--ink);
}

.about-proof-strip div {
  min-width: 0;
  padding: 18px;
  background: #fff;
}

.about-proof-strip span,
.about-who-grid span,
.about-ai-grid span,
.about-boundaries > article > span,
.about-evidence-grid span {
  display: block;
  margin-bottom: 7px;
  color: var(--green);
  font-size: 0.73rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.about-proof-strip strong {
  display: block;
  font-size: clamp(1rem, 2vw, 1.3rem);
  line-height: 1.15;
}

.about-who-grid,
.about-ai-grid,
.about-boundaries,
.about-evidence-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.about-who-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.about-who-grid article,
.about-ai-grid article,
.about-boundaries article,
.about-evidence-grid a {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--ink);
  background: #fff;
}

.about-who-grid h3,
.about-boundaries h3 {
  margin: 0 0 9px;
}

.about-who-grid p {
  margin: 0;
}

.about-principles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 24px;
  border: 1px solid var(--ink);
  background: var(--ink);
}

.about-principles article {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 22px;
  background: var(--paper);
}

.about-principles b,
.about-process > li > span {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--ink);
  background: var(--yellow);
  font-size: 0.78rem;
}

.about-principles h3,
.about-process h3 {
  margin: 0 0 5px;
}

.about-principles p,
.about-process p {
  margin: 0;
}

.about-process {
  display: grid;
  gap: 0;
  margin: 26px 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--ink);
}

.about-process li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 20px;
  border-bottom: 1px solid var(--line);
}

.about-process li:last-child {
  border-bottom: 0;
}

.about-ai-grid article:first-child,
.about-boundaries article:first-child {
  border-top: 6px solid var(--green);
}

.about-ai-grid article:last-child,
.about-boundaries .is-limit {
  border-top: 6px solid var(--yellow);
}

.about-ai-grid ul,
.about-boundaries ul {
  margin: 0;
  padding-left: 20px;
}

.about-ai-grid li + li,
.about-boundaries li + li {
  margin-top: 8px;
}

.about-evidence-grid a {
  color: inherit;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.about-evidence-grid a:hover,
.about-evidence-grid a:focus-visible {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0 var(--yellow);
}

.about-evidence-grid strong,
.about-evidence-grid small {
  display: block;
}

.about-evidence-grid small {
  margin-top: 7px;
  color: var(--muted);
}

@media (max-width: 900px) {
  .about-proof-strip,
  .about-who-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .about-proof-strip,
  .about-who-grid,
  .about-ai-grid,
  .about-boundaries,
  .about-evidence-grid,
  .about-principles {
    grid-template-columns: 1fr;
  }

  .about-proof-strip {
    width: min(100% - 24px, 1180px);
  }

  .about-identity dl div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}