/* Approach identities stay separate from the site's accent color. */
:root{--classical:#ed861a;--quantum:#2582eb;--connection:#6886a9}:root[data-theme=dark]{--classical:#ffa43e;--quantum:#58a5ff;--connection:#90b4d9}
.dot{width:10px;height:10px;background:var(--classical);box-shadow:0 0 0 1px #0000000a}.dot.c{background:var(--classical)}.dot.q{background:var(--quantum)}.dot.h{background:linear-gradient(90deg,var(--quantum) 0 50%,var(--classical) 50% 100%)}
.index-top{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px}.approach-legend{display:flex;flex-wrap:wrap;gap:18px;font-size:12px;color:var(--mut)}.approach-legend>span{display:flex;align-items:center;gap:8px}.index-filters{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:14px;border-top:1px solid var(--line);padding-top:20px}.index-filters label{display:flex;flex-direction:column;gap:7px;font-size:11px;color:var(--mut)}.index-filters input,.index-filters select{width:100%;min-width:0;border:1px solid var(--line);background:var(--panel);border-radius:4px;padding:11px 12px;font-size:14px;color:var(--ink)}.index-meta{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin:20px 0;font-size:12px;color:var(--mut)}.index-sort{display:flex;align-items:center;gap:10px;margin-left:auto}.index-sort select{border:0;background:var(--panel);padding:7px;color:var(--ink);font-size:12px}.index-sort button{padding:6px 12px;font-size:15px}.index-meta>.text-link{font-size:12px;padding:5px 0;border:0}.method-directory{min-width:850px;table-layout:fixed}.method-directory th:first-child{width:43%}.method-directory th:nth-child(2){width:20%}.method-directory th:nth-child(3){width:17%}.method-directory th:nth-child(4){width:12%}.method-directory th:nth-child(5){width:8%}.method-directory th{padding:0 9px 0 0}.method-directory th button{width:100%;display:flex;justify-content:space-between;text-align:left;padding:12px 8px 12px 0;gap:8px;border:0;border-radius:0;font-size:12px}.method-directory th button span{color:var(--mut2)}.method-directory th[aria-sort=ascending] button,.method-directory th[aria-sort=descending] button{color:var(--ink);font-weight:550}.method-directory td{padding:23px 12px 23px 0}.method-directory td:first-child a{font-size:17px;font-weight:550;line-height:1.45}.method-directory td p{font-size:14px;line-height:1.65;max-width:43ch;min-height:3.3em;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.method-directory .kind{white-space:normal;font-size:13px;line-height:1.65;padding-top:26px}.method-directory .dot{margin-right:7px}.date-cell button{padding:3px 0;border:0;font-size:13px;color:var(--mut);font-variant-numeric:tabular-nums;white-space:nowrap}.date-cell button:hover{color:var(--ink);text-decoration:underline}.index-footnote{font-size:12px;color:var(--mut);margin-top:20px}.timeline-intro{font-size:14px;color:var(--mut);margin:25px 0 18px}.timeline-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:24px;align-items:start}.timeline-panel{border:1px solid var(--line);border-radius:5px;overflow:hidden;background:var(--panel);min-width:0}.timeline-tools{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:15px 18px;border-bottom:1px solid var(--line);font-size:11px;color:var(--mut)}.timeline-tools select{border:0;background:var(--soft);border-radius:3px;padding:5px 12px;margin-left:5px;color:var(--ink)}.timeline-scroll{height:620px;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--line) transparent;position:relative}.timeline-world{position:relative;isolation:isolate}.timeline-lines{position:absolute;top:0;left:0;pointer-events:none;z-index:1;overflow:visible}.timeline-lines path{fill:none;stroke:var(--connection);stroke-width:1.6;opacity:.5}.timeline-year-mark{position:absolute;left:12px;font-size:11px;font-variant-numeric:tabular-nums;color:var(--mut)}.timeline-rule{position:absolute;left:12px;right:18px;height:1px;background:var(--line);opacity:.65}.time-node{position:absolute;height:58px;padding:9px 10px;text-align:left;display:flex;align-items:center;gap:8px;font-size:12px;line-height:1.35;background:var(--panel);border:1px solid var(--line);border-radius:4px;z-index:2;transition:opacity .18s,border-color .18s,background .18s}.time-node>span:last-child{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.time-node[aria-pressed=true]{border-color:var(--ink);background:var(--soft);box-shadow:0 0 0 1px var(--ink)}.time-node.connected:not([aria-pressed=true]){border-color:var(--connection)}.time-node.subdued{color:var(--mut)}.time-node.subdued:hover,.time-node.subdued:focus-visible{opacity:1}.foundation-mark{font-family:Georgia,serif;font-size:22px;line-height:1}.timeline-caption{padding:13px 17px;margin:0;border-top:1px solid var(--line);font-size:11px;color:var(--mut);line-height:1.6}.timeline-detail{padding:18px 0;position:sticky;top:20px;min-width:0}.timeline-detail .eyebrow{margin-bottom:10px}.timeline-detail h2{font-size:25px}.timeline-detail>p{font-size:14px;color:var(--mut)}.timeline-detail .timeline-kind{font-size:12px;display:flex;align-items:center;gap:8px;margin:17px 0}.timeline-detail .history-note{font-size:12px;border-left:2px solid var(--line);padding-left:12px}.historical-source{display:block;font-size:12px;text-decoration:underline;text-underline-offset:3px;margin:16px 0 22px;overflow-wrap:anywhere}.timeline-detail>.button{font-size:12px;padding:10px 13px}.timeline-detail>h3{margin-top:27px;padding-top:20px;border-top:1px solid var(--line);font-size:13px}.timeline-neighbors{max-height:260px;overflow:auto;scrollbar-width:thin}.timeline-neighbors>button{display:block;border:0;border-bottom:1px solid var(--line);width:100%;text-align:left;font-size:12px;padding:12px 0;border-radius:0}.timeline-neighbors small{display:block;font-size:11px;color:var(--mut);margin-top:3px}.timeline-neighbors button:disabled{opacity:.5;cursor:default}
@media(max-width:1100px){.index-top{align-items:flex-start;flex-direction:column;gap:14px}.timeline-layout{grid-template-columns:minmax(0,1fr) 260px;gap:20px}.index-filters{grid-template-columns:1fr 1fr}.method-directory th:first-child{width:39%}.method-directory th:nth-child(2){width:21%}.method-directory th:nth-child(3){width:19%}}
@media(max-width:750px){.timeline-layout{display:flex;flex-direction:column}.timeline-panel{width:100%}.timeline-detail{position:static;width:100%;padding:12px 0}.timeline-scroll{height:500px}.timeline-detail .timeline-neighbors{max-height:220px}.approach-legend{gap:9px 15px;font-size:11px}.index-meta{gap:12px}.index-sort{margin-left:0}.index-filters{gap:10px}.index-filters input,.index-filters select{font-size:12px;padding:10px 8px}.index-search{grid-column:1/-1}.index-filters label:last-child{grid-column:1/-1}.index-top .tabs button{font-size:13px}.timeline-tools{padding:12px}.timeline-intro{font-size:13px}.method-directory td p{font-size:14px;max-width:36ch}.time-node{font-size:13px}.timeline-caption{font-size:11px}}
@media(prefers-reduced-motion:reduce){.time-node{transition:none}}
.timeline-lane{position:absolute;top:12px;font-size:10px;color:var(--mut);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
@media(max-width:750px){.method-directory{min-width:0;display:block;table-layout:auto}.method-directory thead{display:none}.method-directory tbody{display:block}.method-directory tr{display:grid;grid-template-columns:1fr 1fr;gap:13px 10px;padding:23px 0;border-bottom:1px solid var(--line)}.method-directory td{display:block;padding:0;border:0;min-width:0}.method-directory td:first-child{grid-column:1/-1}.method-directory td:first-child a{font-size:17px}.method-directory td p{max-width:none;font-size:14px;margin-bottom:2px}.method-directory .kind{font-size:12px;padding:0}.method-directory td[data-label]:before{content:attr(data-label);display:block;font-size:10px;color:var(--mut2);margin-bottom:3px}.method-directory .date-cell button{font-size:12px;padding:0}.index-filters{padding-top:16px}.approach-legend .dot{width:10px;height:10px}}
.timeline-mobile-selection{display:none}@media(max-width:750px){.timeline-mobile-selection{display:block;border-top:1px solid var(--line);padding:12px 16px}.timeline-mobile-selection strong{display:block;font-size:13px;font-weight:550}.timeline-mobile-selection>div{display:flex;justify-content:space-between;align-items:center;margin-top:7px;gap:15px;font-size:12px}.timeline-mobile-selection button{border:0;border-radius:0;padding:4px 0;font-size:12px;text-decoration:underline;text-underline-offset:3px}.timeline-mobile-selection a{font-weight:550}.timeline-scroll{height:clamp(300px,55dvh,500px)}}
.historical-source small{display:block;color:var(--mut);font-size:11px;margin-top:5px}.initial-source{display:block;font-size:12px;color:var(--mut);text-decoration:underline;text-underline-offset:3px;margin:-9px 0 20px}
.timeline-event-filter{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:0 0 22px;font-size:12px}.timeline-event-filter>span{color:var(--mut);margin-right:5px}.timeline-event-filter button{font-size:12px;padding:8px 12px}.timeline-event-filter button[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}.time-node.practical-event{border-style:dashed}.time-node.practical-event[aria-pressed=true]{border-style:solid}
/* Semantic hierarchy remains visible in compact rows and mobile cards. */
.dot.mixed{background:linear-gradient(135deg,var(--classical) 0 40%,var(--mut2) 40% 60%,var(--quantum) 60% 100%)}
.index-semantic-control{margin-bottom:24px}.index-entry-kind{display:block;font-size:10px;line-height:1.5;color:var(--mut);margin-bottom:5px}.method-directory .index-row-variant td:first-child{padding-left:15px;border-left:2px solid var(--line)}.timeline-detail .secondary-source{margin-top:-9px}.timeline-kind{flex-wrap:wrap}
@media(max-width:750px){.index-semantic-control{margin-bottom:20px}.index-entry-kind{font-size:11px}.method-directory .index-row-variant td:first-child{padding-left:12px}.method-directory .index-row-variant td:first-child p{margin-bottom:0}}
.timeline-lines path{stroke-linejoin:round;stroke-linecap:round}