/* Research narrative: editable DOM, the site's existing paper palette and type. */
.learning-loop {
  margin: 32px 0 0;
  padding: clamp(18px, 3vw, 32px);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--surface);
}
.loop-agent {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--hairline);
}
.loop-agent > div { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 16px; }
.loop-agent strong { color: var(--ink); font-size: 1.3rem; letter-spacing: .025em; }
.loop-agent span { color: var(--muted); font-size: .86rem; }
.loop-agent code { font-family: var(--font-mono); font-size: .72rem; color: var(--accent); }
.loop-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; list-style: none; padding: 28px 0; margin: 0; }
.loop-step { position: relative; min-width: 0; }
.loop-step + .loop-step::before { content: '→'; position: absolute; left: -23px; top: -2px; color: var(--muted); }
.loop-step .step-title { margin: 0 0 8px; font-size: 1.08rem; }
.loop-step .step-text { line-height: 1.6; }
.loop-memory { display: flex; align-items: center; gap: 18px; padding: 20px 0 0; border-top: 1px solid var(--hairline); }
.loop-return { font-size: 2rem; color: var(--accent); line-height: 1; }
.loop-memory strong { font-size: .9rem; font-weight: 500; color: var(--ink); }
.loop-skills { display: flex; flex-wrap: wrap; gap: 5px 16px; margin-top: 9px; color: var(--ink-2); font-family: var(--font-mono); font-size: .67rem; }
.loop-next { flex-shrink: 0; margin-left: auto; font-size: .78rem; color: var(--accent); }
.learning-loop figcaption { margin: 22px 0 0; text-align: left; font-size: .8rem; }
.method-tools { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 28px; }
.method-tool h3 { font-size: 1rem; margin: 0 0 8px; }
.method-tool p { margin: 0; font-size: .88rem; line-height: 1.65; }
#evolution-note { margin-top: 24px; }
.evolution-protocol { margin-top: 10px; font-size: .76rem; }
.policy-architecture { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; list-style: none; margin: 28px 0; padding: 22px 0; border-block: 1px solid var(--hairline); }
.policy-architecture li { position: relative; min-width: 0; }
.policy-architecture li + li::before { content: '→'; position: absolute; left: -24px; color: var(--accent); }
.policy-architecture h3 { font-size: .98rem; margin: 0 0 8px; }
.policy-architecture p { font-size: .85rem; line-height: 1.6; margin: 0; }
.policy-result { display: flex; gap: 28px; align-items: center; margin: 0 0 26px; }
.policy-metric { flex-shrink: 0; display: grid; gap: 3px; }
.policy-metric strong { color: var(--ink); font-size: 1.65rem; line-height: 1.2; }
.policy-metric span { font-size: .74rem; color: var(--muted); }
.policy-result p { font-size: .84rem; line-height: 1.6; margin: 0; max-width: 630px; }
.policy-examples { border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.policy-examples summary { padding: 20px 0; color: var(--ink); font-weight: 500; cursor: pointer; }
.policy-examples summary span { display: inline-block; margin-left: 16px; font-size: .8rem; color: var(--muted); font-weight: 400; }
.policy-examples summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.policy-dataset { padding: 0 0 24px; }
.policy-dataset > p { max-width: 780px; font-size: .9rem; }
#platform .platform-grid { margin-top: 28px; }
@media (max-width: 960px) {
  .loop-agent { flex-direction: column; align-items: flex-start; }
  .loop-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .loop-step:nth-child(3)::before { content: none; }
}
@media (max-width: 600px) {
  .loop-steps, .method-tools, .policy-architecture { grid-template-columns: 1fr; }
  .loop-steps { gap: 24px; }
  .loop-step { padding-left: 30px; }
  .loop-step .step-num { position: absolute; left: 0; top: 3px; }
  .loop-step + .loop-step::before { content: none; }
  .loop-memory { flex-wrap: wrap; gap: 12px; align-items: flex-start; }
  .loop-memory > div { flex: 1; }
  .loop-next { width: 100%; padding-left: 38px; }
  .loop-agent code { font-size: clamp(.6rem, 2.6vw, .72rem); overflow-wrap: anywhere; }
  .method-tools { gap: 24px; }
  .policy-architecture { gap: 28px; }
  .policy-architecture li + li::before { content: '↓'; left: 0; top: -26px; }
  .policy-result { flex-wrap: wrap; gap: 16px; }
  .policy-examples summary span { display: block; margin: 5px 0 0 18px; }
}