.support-module-overview {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.support-module-overview article {
  min-width: 0;
  padding: 22px 18px;
  border-right: 1px solid var(--line);
}

.support-module-overview article:first-child {
  padding-left: 0;
}

.support-module-overview article:last-child {
  padding-right: 0;
  border-right: 0;
}

.support-module-overview span,
.support-module-fieldset legend,
.support-field-group > h3,
.support-controls > summary {
  color: #526079;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.support-module-overview strong {
  display: block;
  margin-top: 8px;
  color: var(--ink-strong);
  font-size: 1rem;
}

.support-module-overview p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

.support-policy-shell {
  grid-template-columns: minmax(340px, 0.98fr) minmax(0, 1.02fr);
}

.support-module-fieldset {
  min-width: 0;
  margin: 0;
  border: 0;
  padding: 0;
}

.support-module-fieldset legend {
  margin-bottom: 9px;
  padding: 0;
}

.support-module-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.15);
  border-radius: 8px;
  background: #eef2f6;
}

.support-module-tabs button {
  min-width: 0;
  min-height: 42px;
  border: 0;
  border-right: 1px solid rgba(15, 23, 42, 0.12);
  padding: 0 10px;
  color: #46546a;
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
}

.support-module-tabs button:last-child {
  border-right: 0;
}

.support-module-tabs button[aria-selected="true"] {
  color: #ffffff;
  background: #17325f;
}

.support-module-tabs button:focus-visible {
  position: relative;
  z-index: 1;
  outline: 3px solid rgba(23, 50, 95, 0.28);
  outline-offset: -3px;
}

.support-module-description {
  min-height: 2.7em;
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.5;
}

.support-field-group {
  display: grid;
  gap: 10px;
  min-width: 0;
  border-top: 1px solid rgba(15, 23, 42, 0.1);
  padding-top: 16px;
}

.support-field-group > h3 {
  margin: 0;
}

.support-field-grid,
.support-policy-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  min-width: 0;
}

.support-policy-fields[hidden] {
  display: none;
}

.support-controls {
  border-top: 1px solid rgba(15, 23, 42, 0.1);
  border-bottom: 1px solid rgba(15, 23, 42, 0.1);
  padding: 14px 0;
}

.support-controls > summary {
  cursor: pointer;
  list-style-position: outside;
}

.support-controls[open] > summary {
  margin-bottom: 12px;
}

.support-policy-output .proposal-decision-meta {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.support-record-chain {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 24px minmax(0, 1fr);
  align-items: stretch;
  margin-top: 14px;
  border-top: 1px solid rgba(15, 23, 42, 0.1);
  border-bottom: 1px solid rgba(15, 23, 42, 0.1);
}

.support-record-chain section {
  min-width: 0;
  padding: 16px 0;
}

.support-record-chain section:last-child {
  padding-left: 14px;
}

.support-record-chain .support-chain-arrow {
  display: grid;
  place-items: center;
  color: #758197;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
}

.support-record-chain h3 {
  margin: 0 0 7px;
  font-size: 0.92rem;
}

.support-record-chain p {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

@media (max-width: 920px) {
  .support-module-overview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .support-module-overview article,
  .support-module-overview article:first-child,
  .support-module-overview article:last-child {
    padding: 18px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .support-module-overview article:nth-child(2n) {
    border-right: 0;
  }

  .support-module-overview article:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .support-policy-shell {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 620px) {
  .support-module-tabs,
  .support-field-grid,
  .support-policy-fields {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .support-module-tabs button:nth-child(2) {
    border-right: 0;
  }

  .support-module-tabs button:nth-child(-n + 2) {
    border-bottom: 1px solid rgba(15, 23, 42, 0.12);
  }

  .support-policy-output .proposal-decision-meta {
    grid-template-columns: minmax(0, 1fr);
  }

  .support-record-chain {
    grid-template-columns: minmax(0, 1fr);
  }

  .support-record-chain section:last-child {
    padding-left: 0;
  }

  .support-record-chain .support-chain-arrow {
    min-height: 24px;
    transform: rotate(90deg);
  }
}