.learn-sources { border-top: 1px solid var(--line); margin-top: 28px; max-width: 960px; }
.learn-sources summary { cursor: pointer; padding: 18px 0; color: var(--text-soft); font: 600 18px/1.4 var(--font-display); }
.learn-sources summary:hover { color: var(--text); }
.learn-sources ul { list-style: none; margin: 0; padding: 0 0 6px; display: grid; gap: 20px; }
.learn-sources li { padding-left: 15px; border-left: 2px solid var(--line-strong); }
.learn-source-title { font-weight: 600; text-decoration: underline; text-underline-offset: 4px; text-decoration-color: var(--line-strong); overflow-wrap: anywhere; }
.learn-source-title:hover { text-decoration-color: var(--red); }
.learn-source-meta, .learn-source-location { margin: 7px 0 0; color: var(--muted); font-size: 12px; overflow-wrap: anywhere; }
.learn-source-claim { color: var(--text-soft); margin: 9px 0 0; max-width: 780px; line-height: 1.55; }