/* Supporting capabilities, deliberately quieter than the intelligence story. */
.essentials {
  border-top: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
}
.essentials .essentials-layout {
  display: grid;
  grid-template-columns: .86fr 1.14fr;
  gap: clamp(38px, 7vw, 100px);
  align-items: start;
}
.essentials .essentials-intro h2 {
  font-size: clamp(30px, 3.1vw, 44px);
  line-height: 1.16;
  letter-spacing: -1.5px;
  margin: 0 0 20px;
}
.essentials .essentials-intro > p:not(.eyebrow) {
  max-width: 390px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}
.essentials .essentials-caption {
  display: block;
  margin-top: 25px;
  color: var(--muted);
  font-size: 10px;
}
.essentials .essentials-list { border-top: 1px solid var(--line); }
.essentials .essentials-item { border-bottom: 1px solid var(--line); }
.essentials .essentials-item summary {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 76px;
  padding: 19px 0;
  list-style: none;
  cursor: pointer;
  color: var(--text);
}
.essentials .essentials-item summary::-webkit-details-marker { display: none; }
.essentials .essentials-item summary::marker { content: ''; }
.essentials .essentials-index {
  flex: 0 0 18px;
  font-size: 9px;
  color: var(--muted);
  letter-spacing: .6px;
}
.essentials .essentials-name {
  flex: 1;
  font-size: 16px;
  line-height: 1.5;
  font-weight: 400;
}
.essentials .essentials-plus {
  flex: 0 0 20px;
  text-align: center;
  font-size: 22px;
  line-height: 1;
  font-weight: 300;
  color: var(--accent);
  transition: transform .2s ease;
}
.essentials .essentials-item[open] .essentials-plus { transform: rotate(45deg); }
.essentials .essentials-item summary:hover .essentials-name,
.essentials .essentials-item[open] .essentials-name { color: var(--accent); }
.essentials .essentials-item summary:focus-visible,
.essentials .essentials-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
}
.essentials .essentials-detail { padding: 0 35px 25px 36px; }
.essentials .essentials-detail p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.85;
}
.essentials .essentials-link {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  min-height: 44px;
  margin-top: 12px;
  color: var(--accent);
  font-size: 11px;
  text-decoration: none;
}
.essentials .essentials-link:hover { text-decoration: underline; text-underline-offset: 4px; }
@media (max-width: 820px) {
  .essentials .essentials-layout { grid-template-columns: 1fr; gap: 30px; }
  .essentials .essentials-intro > p:not(.eyebrow) { max-width: 540px; }
  .essentials .essentials-caption { margin-top: 15px; }
}
@media (max-width: 600px) {
  .essentials .essentials-intro h2 { font-size: 32px; letter-spacing: -1.2px; }
  .essentials .essentials-item summary { min-height: 68px; gap: 13px; padding: 17px 0; }
  .essentials .essentials-name { font-size: 14px; }
  .essentials .essentials-detail { padding: 0 24px 22px 31px; }
  .essentials .essentials-detail p { font-size: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  .essentials .essentials-plus { transition: none; }
}