/* ==================== 02. ALLIANCE (VARIANT 3A: ARCHITECTURAL SPECIFICATION LEDGER) ==================== */
.alliance {
  background: var(--stone);
  color: #181411;
  padding: 108px 0 116px;
}

.alliance .eyebrow {
  color: #7c5834;
}

.alliance .eyebrow::before {
  background: #7c5834;
}

.alliance-intro {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: end;
  padding-bottom: 40px;
  margin-bottom: 44px;
  border-bottom: 1px solid rgba(24, 20, 17, 0.12);
}

.alliance-title {
  font-family: var(--font-serif);
  font-size: clamp(36px, 3.8vw, 52px);
  line-height: 1.05;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  color: #181411;
}

.alliance-title span {
  font-style: normal;
  font-weight: 500;
  color: #8a623a;
}

.alliance-lead {
  color: #3f3831;
  font-size: 15.5px;
  line-height: 1.65;
}

.alliance-lead p {
  margin: 0;
}

.duo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(24, 20, 17, 0.14);
  border: 1px solid rgba(24, 20, 17, 0.14);
}

.duo-card {
  background: var(--stone-card);
  padding: 40px 44px 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
}

.duo-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid rgba(24, 20, 17, 0.12);
  padding-bottom: 20px;
}

.duo-brand {
  display: flex;
  align-items: center;
  gap: 15px;
}

.duo-brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.duo-brand h3 {
  font-family: var(--font-serif);
  font-size: 31px;
  font-weight: 600;
  margin: 0;
  color: #181411;
  line-height: 1.08;
}

.duo-brand small {
  display: block;
  font-family: var(--font-sans);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #7c5834;
  font-weight: 700;
  margin-bottom: 4px;
}

.duo-code {
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #6b533b;
  padding: 6px 10px;
  border: 1px solid rgba(24, 20, 17, 0.14);
  background: rgba(24, 20, 17, 0.03);
  white-space: nowrap;
}

.duo-card-lead {
  margin: 14px 0 8px;
  font-size: 14.5px;
  font-weight: 600;
  color: #2f2923;
  line-height: 1.5;
}

.alliance-contract-note {
  margin: 18px 0 0;
  font-size: 12px;
  line-height: 1.5;
  color: #695e53;
}

/* Architectural Specification Table (Replaces Bullet List) */
.duo-specs {
  margin: 6px 0 0;
  display: flex;
  flex-direction: column;
}

.duo-spec-row {
  display: grid;
  grid-template-columns: 156px 1fr;
  gap: 20px;
  padding: 15px 0;
  border-bottom: 1px solid rgba(24, 20, 17, 0.09);
  align-items: baseline;
}

.duo-spec-row:last-child {
  border-bottom: 0;
  padding-bottom: 4px;
}

.duo-spec-row dt {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #7c5834;
  line-height: 1.4;
}

.duo-spec-row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.54;
  color: #2f2923;
}

.duo-foot {
  padding-top: 16px;
  border-top: 1px solid rgba(24, 20, 17, 0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.duo-tag {
  color: #6e5236;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 700;
}

.duo-clients {
  font-size: 11.5px;
  color: #695e53;
  font-weight: 500;
}

.alliance-mobile-tabs {
  display: none;
}

@media (max-width: 1080px) {
  .alliance {
    padding: 80px 0 88px;
  }
  .alliance-intro,
  .duo-grid {
    grid-template-columns: 1fr;
  }
  .alliance-intro {
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .alliance {
    padding: 56px 0 64px;
  }
  .alliance-intro {
    gap: 16px;
    padding-bottom: 22px;
    margin-bottom: 22px;
  }
  .alliance-title {
    font-size: clamp(30px, 7.8vw, 36px);
  }
  .alliance-lead {
    font-size: 14.5px;
    line-height: 1.54;
  }
  .alliance-mobile-tabs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
    padding: 4px;
    background: rgba(24, 20, 17, 0.08);
    border: 1px solid rgba(24, 20, 17, 0.14);
    margin-bottom: 14px;
  }
  .alliance-mobile-tab {
    padding: 11px 8px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #5c5044;
    text-align: center;
    transition: background 0.25s var(--ease), color 0.25s var(--ease);
  }
  .alliance-mobile-tab.active {
    background: #181411;
    color: var(--stone-card);
  }
  .duo-card {
    display: none;
    padding: 24px 18px;
    gap: 18px;
  }
  .duo-card.active-wing {
    display: flex;
    animation: fadePanel 0.3s var(--ease);
  }
  .duo-card-head {
    flex-direction: row;
    align-items: center;
    padding-bottom: 14px;
  }
  .duo-brand img {
    width: 34px;
    height: 34px;
  }
  .duo-brand h3 {
    font-size: 24px;
  }
  .duo-code,
  .duo-foot {
    display: none;
  }
  .duo-spec-row {
    grid-template-columns: 108px 1fr;
    gap: 12px;
    padding: 11px 0;
  }
  .duo-spec-row dt {
    font-size: 10px;
  }
  .duo-spec-row dd {
    font-size: 13.5px;
    line-height: 1.46;
  }
}