.evidence-band {
  display: grid;
  grid-template-columns: minmax(300px, 0.68fr) minmax(560px, 1.32fr);
  gap: 30px;
  align-items: start;
  margin: 10px 0 44px;
  padding: 34px;
  border: 1px solid var(--line-200);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(213, 237, 235, 0.5), rgba(255, 255, 255, 0) 58%),
    var(--white);
  box-shadow: var(--shadow-soft);
}

.evidence-copy {
  position: sticky;
  top: 102px;
}

.evidence-copy h2 {
  max-width: 540px;
  margin: 0;
  font-size: 54px;
  line-height: 1.02;
  letter-spacing: 0;
}

.evidence-copy .section-lead {
  max-width: 520px;
  margin-top: 20px;
}

.premise-carousel {
  display: grid;
  grid-template-areas:
    "panel"
    "tabs";
  gap: 14px;
}

.premise-panel {
  grid-area: panel;
  min-height: 404px;
  padding: 30px;
  border: 1px solid rgba(14, 92, 88, 0.18);
  border-radius: 22px;
  background: var(--white);
  box-shadow: 0 18px 36px rgba(11, 15, 18, 0.06);
}

.premise-panel h3 {
  max-width: 760px;
  margin: 12px 0 0;
  color: var(--ink-900);
  font-size: 38px;
  line-height: 1.08;
  letter-spacing: 0;
}

.premise-panel p {
  max-width: 720px;
  margin: 16px 0 0;
  color: var(--ink-500);
  font-size: 18px;
  line-height: 1.5;
}

.evidence-source-block {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line-200);
}

.evidence-source-block > span {
  display: block;
  color: var(--teal-900);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.research-ledger {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.source-card {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 12px;
  align-items: center;
  min-height: 88px;
  padding: 12px;
  border: 1px solid rgba(14, 92, 88, 0.14);
  border-radius: 16px;
  background: rgba(238, 248, 247, 0.55);
}

.source-card:hover {
  border-color: rgba(14, 92, 88, 0.34);
  background: var(--white);
}

.source-card:focus-visible,
.premise-tab:focus-visible {
  outline: 3px solid rgba(19, 128, 122, 0.28);
  outline-offset: 3px;
}

.source-mark {
  display: grid;
  width: 58px;
  min-height: 46px;
  place-items: center;
  border: 1px solid rgba(14, 92, 88, 0.2);
  border-radius: 14px;
  background: var(--teal-900);
  color: var(--white);
  font-size: 11px;
  font-weight: 950;
  letter-spacing: 0.04em;
  text-align: center;
}

.source-card strong,
.source-card em {
  display: block;
}

.source-card strong {
  color: var(--ink-900);
  font-size: 14px;
  line-height: 1.25;
}

.source-card em {
  margin-top: 5px;
  color: var(--ink-500);
  font-size: 12px;
  font-style: normal;
  line-height: 1.35;
}

.premise-tabs {
  grid-area: tabs;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.premise-tab {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 10px;
  min-height: 138px;
  padding: 14px;
  border: 1px solid var(--line-200);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink-700);
  cursor: pointer;
  text-align: left;
}

.premise-tab:hover {
  border-color: rgba(14, 92, 88, 0.24);
  background: var(--white);
}

.premise-tab.is-active {
  border-color: var(--teal-700);
  background: var(--white);
  box-shadow: inset 0 0 0 1px var(--teal-700);
}

.premise-tab span {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border-radius: 999px;
  background: var(--teal-50);
  color: var(--teal-900);
  font-size: 12px;
  font-weight: 900;
}

.premise-tab.is-active span {
  background: var(--teal-900);
  color: var(--white);
}

.premise-tab strong {
  align-self: start;
  color: inherit;
  font-size: 13px;
  line-height: 1.28;
}

@media (max-width: 1120px) {
  .evidence-band {
    grid-template-columns: 1fr;
  }

  .evidence-copy {
    position: static;
  }

  .evidence-copy h2 {
    font-size: 46px;
  }
}

@media (max-width: 820px) {
  .research-ledger,
  .premise-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .premise-panel {
    min-height: 0;
  }
}

@media (max-width: 660px) {
  .evidence-band {
    margin-bottom: 34px;
    padding: 22px;
    border-radius: 20px;
  }

  .evidence-copy h2 {
    font-size: 34px;
    line-height: 1.08;
  }

  .premise-panel {
    padding: 22px;
    border-radius: 18px;
  }

  .premise-panel h3 {
    font-size: 29px;
    line-height: 1.12;
  }

  .premise-panel p {
    font-size: 16px;
  }

  .research-ledger,
  .premise-tabs {
    grid-template-columns: 1fr;
  }

  .source-card {
    grid-template-columns: 58px 1fr;
  }

  .premise-tab {
    min-height: 0;
  }
}