.brief-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.62fr);
  gap: clamp(50px, 9vw, 130px);
  align-items: center;
  min-height: calc(100vh - 68px);
  padding: 90px 6vw 104px;
  border-bottom: 1px solid var(--line);
}

.brief-hero-copy {
  max-width: 860px;
}

.brief-hero h1 {
  font-size: clamp(48px, 6.8vw, 94px);
}

.brief-note {
  max-width: 700px;
  margin: -8px 0 28px;
  color: var(--teal);
  font-size: 14px;
  line-height: 1.55;
}

.one-line-brief {
  max-width: 760px;
  margin: 0 0 30px;
  padding: 16px 18px;
  border-left: 3px solid var(--green);
  color: var(--muted);
  background: var(--soft);
  font-size: 14px;
  line-height: 1.6;
}

.one-line-brief strong {
  color: var(--ink);
}

.memo-panel {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  box-shadow: 0 24px 70px rgba(24, 65, 43, 0.12);
}

.memo-brand {
  margin: 36px 0 8px;
  color: var(--green);
  font-size: clamp(50px, 6vw, 78px);
  font-weight: 800;
  letter-spacing: -0.07em;
}

.memo-panel > p:not(.card-kicker) {
  color: var(--muted);
}

.memo-panel dl {
  margin: 34px 0 0;
  border-top: 1px solid var(--line);
}

.memo-panel dl div {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.memo-panel dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
  text-transform: uppercase;
}

.memo-panel dd {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  text-align: right;
}

.brief-section {
  border-bottom: 1px solid var(--line);
}

.definition-section {
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.definition-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.definition-grid article {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper);
}

.definition-grid ul {
  display: grid;
  gap: 0;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.definition-grid li {
  position: relative;
  padding: 14px 8px 14px 24px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.5;
}

.definition-grid li::before {
  position: absolute;
  left: 2px;
  content: "—";
  color: var(--green);
  font-weight: 800;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.summary-grid article {
  min-height: 230px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--white);
}

.summary-grid article > p:last-child,
.buyer-grid p,
.architecture-grid p,
.uses-list p,
.brief-copy {
  color: var(--muted);
  line-height: 1.58;
}

.brief-dark {
  border-bottom: 0;
}

.brief-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.8fr);
  gap: clamp(60px, 9vw, 140px);
  align-items: start;
}

.brief-principles {
  margin: 0;
  padding: 0;
  counter-reset: brief-principle;
  border-top: 1px solid rgba(255, 255, 255, 0.17);
  list-style: none;
}

.brief-principles li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.17);
  line-height: 1.5;
}

.brief-principles li::before {
  counter-increment: brief-principle;
  content: "0" counter(brief-principle);
  color: var(--lime);
  font-size: 11px;
  font-weight: 800;
}

.architecture-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.architecture-grid article {
  min-height: 245px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.82);
}

.architecture-grid article:last-child {
  grid-column: 1 / -1;
  min-height: 200px;
}

.architecture-grid span,
.uses-list > article > span {
  display: block;
  margin-bottom: 54px;
  color: var(--teal);
  font-size: 11px;
  font-weight: 800;
}

.buyer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.buyer-grid article {
  min-height: 220px;
  padding: 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.brief-brand-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(0, 1fr);
  gap: clamp(60px, 10vw, 150px);
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.brief-brand-mark {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--green);
  background: var(--white);
  box-shadow: inset 0 0 0 28px var(--soft);
  font-size: clamp(48px, 6vw, 90px);
  font-weight: 800;
  letter-spacing: -0.07em;
}

.brief-copy {
  max-width: 760px;
  font-size: 18px;
}

.legal-note {
  margin-top: 24px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.uses-section {
  background: var(--white);
}

.uses-list {
  max-width: 980px;
  border-top: 1px solid var(--line);
}

.uses-list article {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.uses-list > article > span {
  margin: 5px 0 0;
}

.uses-list h3 {
  margin-bottom: 7px;
}

.uses-list p {
  margin-bottom: 0;
}

.mid-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 60px 6vw;
  color: var(--white);
  background: var(--green-dark);
}

.mid-cta .eyebrow {
  color: var(--lime);
}

.mid-cta h2 {
  max-width: 760px;
  margin-bottom: 0;
  font-size: clamp(34px, 4.3vw, 58px);
}

.mid-cta .button {
  flex: 0 0 auto;
  color: var(--green-dark);
  border-color: var(--lime);
  background: var(--lime);
}

.brief-inquiry {
  border-bottom: 0;
}

.process-note {
  margin-top: 22px;
  font-size: 12px;
}

.brief-faq {
  border-bottom: 0;
}

.brief-faq a {
  color: var(--green);
  font-weight: 700;
}

@media (max-width: 1080px) {
  .brief-hero,
  .brief-split,
  .brief-brand-section {
    grid-template-columns: 1fr;
  }

  .brief-hero {
    min-height: auto;
  }

  .memo-panel {
    max-width: 620px;
  }

  .buyer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .brief-brand-mark {
    width: min(100%, 470px);
  }
}

@media (max-width: 700px) {
  .brief-hero {
    padding: 72px 20px;
  }

  .brief-hero h1 {
    font-size: clamp(44px, 14vw, 62px);
  }

  .summary-grid,
  .definition-grid,
  .architecture-grid,
  .buyer-grid {
    grid-template-columns: 1fr;
  }

  .architecture-grid article:last-child {
    grid-column: auto;
  }

  .brief-split {
    gap: 44px;
  }

  .brief-brand-section {
    gap: 52px;
  }

  .brief-brand-mark {
    box-shadow: inset 0 0 0 18px var(--soft);
  }

  .uses-list article {
    grid-template-columns: 42px 1fr;
    gap: 14px;
  }

  .mid-cta {
    align-items: stretch;
    flex-direction: column;
    padding: 52px 20px;
  }

  .mid-cta .button {
    width: 100%;
  }
}